diff options
Diffstat (limited to 'freebsd/sys/netipsec/key.c')
| -rw-r--r-- | freebsd/sys/netipsec/key.c | 7131 |
1 files changed, 3732 insertions, 3399 deletions
diff --git a/freebsd/sys/netipsec/key.c b/freebsd/sys/netipsec/key.c index 6619c6db..5d3a612d 100644 --- a/freebsd/sys/netipsec/key.c +++ b/freebsd/sys/netipsec/key.c @@ -44,12 +44,14 @@ #include <rtems/bsd/sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> +#include <sys/fnv_hash.h> #include <rtems/bsd/sys/lock.h> #include <sys/mutex.h> #include <sys/mbuf.h> #include <sys/domain.h> #include <sys/protosw.h> #include <sys/malloc.h> +#include <sys/rmlock.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <sys/sysctl.h> @@ -59,15 +61,18 @@ #include <sys/refcount.h> #include <sys/syslog.h> +#include <vm/uma.h> + #include <net/if.h> -#include <net/route.h> -#include <net/raw_cb.h> +#include <net/if_var.h> #include <net/vnet.h> +#include <net/raw_cb.h> #include <netinet/in.h> #include <netinet/in_systm.h> #include <netinet/ip.h> #include <netinet/in_var.h> +#include <netinet/udp.h> #ifdef INET6 #include <netinet/ip6.h> @@ -75,13 +80,6 @@ #include <netinet6/ip6_var.h> #endif /* INET6 */ -#if defined(INET) || defined(INET6) -#include <netinet/in_pcb.h> -#endif -#ifdef INET6 -#include <netinet6/in6_pcb.h> -#endif /* INET6 */ - #include <net/pfkeyv2.h> #include <netipsec/keydb.h> #include <netipsec/key.h> @@ -94,7 +92,7 @@ #endif #include <netipsec/xform.h> - +#include <machine/in_cksum.h> #include <machine/stdarg.h> /* randomness */ @@ -142,28 +140,118 @@ static VNET_DEFINE(int, key_preferred_oldsa) = 1; static VNET_DEFINE(u_int32_t, acq_seq) = 0; #define V_acq_seq VNET(acq_seq) - /* SPD */ -static VNET_DEFINE(LIST_HEAD(_sptree, secpolicy), sptree[IPSEC_DIR_MAX]); +static VNET_DEFINE(uint32_t, sp_genid) = 0; +#define V_sp_genid VNET(sp_genid) + +/* SPD */ +TAILQ_HEAD(secpolicy_queue, secpolicy); +LIST_HEAD(secpolicy_list, secpolicy); +static VNET_DEFINE(struct secpolicy_queue, sptree[IPSEC_DIR_MAX]); +static VNET_DEFINE(struct secpolicy_queue, sptree_ifnet[IPSEC_DIR_MAX]); +static struct rmlock sptree_lock; #define V_sptree VNET(sptree) -static struct mtx sptree_lock; -#define SPTREE_LOCK_INIT() \ - mtx_init(&sptree_lock, "sptree", \ - "fast ipsec security policy database", MTX_DEF) -#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) -#define SPTREE_LOCK() mtx_lock(&sptree_lock) -#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) -#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) - -static VNET_DEFINE(LIST_HEAD(_sahtree, secashead), sahtree); /* SAD */ +#define V_sptree_ifnet VNET(sptree_ifnet) +#define SPTREE_LOCK_INIT() rm_init(&sptree_lock, "sptree") +#define SPTREE_LOCK_DESTROY() rm_destroy(&sptree_lock) +#define SPTREE_RLOCK_TRACKER struct rm_priotracker sptree_tracker +#define SPTREE_RLOCK() rm_rlock(&sptree_lock, &sptree_tracker) +#define SPTREE_RUNLOCK() rm_runlock(&sptree_lock, &sptree_tracker) +#define SPTREE_RLOCK_ASSERT() rm_assert(&sptree_lock, RA_RLOCKED) +#define SPTREE_WLOCK() rm_wlock(&sptree_lock) +#define SPTREE_WUNLOCK() rm_wunlock(&sptree_lock) +#define SPTREE_WLOCK_ASSERT() rm_assert(&sptree_lock, RA_WLOCKED) +#define SPTREE_UNLOCK_ASSERT() rm_assert(&sptree_lock, RA_UNLOCKED) + +/* Hash table for lookup SP using unique id */ +static VNET_DEFINE(struct secpolicy_list *, sphashtbl); +static VNET_DEFINE(u_long, sphash_mask); +#define V_sphashtbl VNET(sphashtbl) +#define V_sphash_mask VNET(sphash_mask) + +#define SPHASH_NHASH_LOG2 7 +#define SPHASH_NHASH (1 << SPHASH_NHASH_LOG2) +#define SPHASH_HASHVAL(id) (key_u32hash(id) & V_sphash_mask) +#define SPHASH_HASH(id) &V_sphashtbl[SPHASH_HASHVAL(id)] + +/* SAD */ +TAILQ_HEAD(secashead_queue, secashead); +LIST_HEAD(secashead_list, secashead); +static VNET_DEFINE(struct secashead_queue, sahtree); +static struct rmlock sahtree_lock; #define V_sahtree VNET(sahtree) -static struct mtx sahtree_lock; -#define SAHTREE_LOCK_INIT() \ - mtx_init(&sahtree_lock, "sahtree", \ - "fast ipsec security association database", MTX_DEF) -#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) -#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) -#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) -#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) +#define SAHTREE_LOCK_INIT() rm_init(&sahtree_lock, "sahtree") +#define SAHTREE_LOCK_DESTROY() rm_destroy(&sahtree_lock) +#define SAHTREE_RLOCK_TRACKER struct rm_priotracker sahtree_tracker +#define SAHTREE_RLOCK() rm_rlock(&sahtree_lock, &sahtree_tracker) +#define SAHTREE_RUNLOCK() rm_runlock(&sahtree_lock, &sahtree_tracker) +#define SAHTREE_RLOCK_ASSERT() rm_assert(&sahtree_lock, RA_RLOCKED) +#define SAHTREE_WLOCK() rm_wlock(&sahtree_lock) +#define SAHTREE_WUNLOCK() rm_wunlock(&sahtree_lock) +#define SAHTREE_WLOCK_ASSERT() rm_assert(&sahtree_lock, RA_WLOCKED) +#define SAHTREE_UNLOCK_ASSERT() rm_assert(&sahtree_lock, RA_UNLOCKED) + +/* Hash table for lookup in SAD using SA addresses */ +static VNET_DEFINE(struct secashead_list *, sahaddrhashtbl); +static VNET_DEFINE(u_long, sahaddrhash_mask); +#define V_sahaddrhashtbl VNET(sahaddrhashtbl) +#define V_sahaddrhash_mask VNET(sahaddrhash_mask) + +#define SAHHASH_NHASH_LOG2 7 +#define SAHHASH_NHASH (1 << SAHHASH_NHASH_LOG2) +#define SAHADDRHASH_HASHVAL(saidx) \ + (key_saidxhash(saidx) & V_sahaddrhash_mask) +#define SAHADDRHASH_HASH(saidx) \ + &V_sahaddrhashtbl[SAHADDRHASH_HASHVAL(saidx)] + +/* Hash table for lookup in SAD using SPI */ +LIST_HEAD(secasvar_list, secasvar); +static VNET_DEFINE(struct secasvar_list *, savhashtbl); +static VNET_DEFINE(u_long, savhash_mask); +#define V_savhashtbl VNET(savhashtbl) +#define V_savhash_mask VNET(savhash_mask) +#define SAVHASH_NHASH_LOG2 7 +#define SAVHASH_NHASH (1 << SAVHASH_NHASH_LOG2) +#define SAVHASH_HASHVAL(spi) (key_u32hash(spi) & V_savhash_mask) +#define SAVHASH_HASH(spi) &V_savhashtbl[SAVHASH_HASHVAL(spi)] + +static uint32_t +key_saidxhash(const struct secasindex *saidx) +{ + uint32_t hval; + + hval = fnv_32_buf(&saidx->proto, sizeof(saidx->proto), + FNV1_32_INIT); + switch (saidx->dst.sa.sa_family) { +#ifdef INET + case AF_INET: + hval = fnv_32_buf(&saidx->src.sin.sin_addr, + sizeof(in_addr_t), hval); + hval = fnv_32_buf(&saidx->dst.sin.sin_addr, + sizeof(in_addr_t), hval); + break; +#endif +#ifdef INET6 + case AF_INET6: + hval = fnv_32_buf(&saidx->src.sin6.sin6_addr, + sizeof(struct in6_addr), hval); + hval = fnv_32_buf(&saidx->dst.sin6.sin6_addr, + sizeof(struct in6_addr), hval); + break; +#endif + default: + hval = 0; + ipseclog((LOG_DEBUG, "%s: unknown address family %d", + __func__, saidx->dst.sa.sa_family)); + } + return (hval); +} + +static uint32_t +key_u32hash(uint32_t val) +{ + + return (fnv_32_buf(&val, sizeof(val), FNV1_32_INIT)); +} /* registed list */ static VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]); @@ -176,16 +264,40 @@ static struct mtx regtree_lock; #define REGTREE_UNLOCK() mtx_unlock(®tree_lock) #define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) -static VNET_DEFINE(LIST_HEAD(_acqtree, secacq), acqtree); /* acquiring list */ +/* Acquiring list */ +LIST_HEAD(secacq_list, secacq); +static VNET_DEFINE(struct secacq_list, acqtree); #define V_acqtree VNET(acqtree) static struct mtx acq_lock; #define ACQ_LOCK_INIT() \ - mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) + mtx_init(&acq_lock, "acqtree", "ipsec SA acquiring list", MTX_DEF) #define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) #define ACQ_LOCK() mtx_lock(&acq_lock) #define ACQ_UNLOCK() mtx_unlock(&acq_lock) #define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) +/* Hash table for lookup in ACQ list using SA addresses */ +static VNET_DEFINE(struct secacq_list *, acqaddrhashtbl); +static VNET_DEFINE(u_long, acqaddrhash_mask); +#define V_acqaddrhashtbl VNET(acqaddrhashtbl) +#define V_acqaddrhash_mask VNET(acqaddrhash_mask) + +/* Hash table for lookup in ACQ list using SEQ number */ +static VNET_DEFINE(struct secacq_list *, acqseqhashtbl); +static VNET_DEFINE(u_long, acqseqhash_mask); +#define V_acqseqhashtbl VNET(acqseqhashtbl) +#define V_acqseqhash_mask VNET(acqseqhash_mask) + +#define ACQHASH_NHASH_LOG2 7 +#define ACQHASH_NHASH (1 << ACQHASH_NHASH_LOG2) +#define ACQADDRHASH_HASHVAL(saidx) \ + (key_saidxhash(saidx) & V_acqaddrhash_mask) +#define ACQSEQHASH_HASHVAL(seq) \ + (key_u32hash(seq) & V_acqseqhash_mask) +#define ACQADDRHASH_HASH(saidx) \ + &V_acqaddrhashtbl[ACQADDRHASH_HASHVAL(saidx)] +#define ACQSEQHASH_HASH(seq) \ + &V_acqseqhashtbl[ACQSEQHASH_HASHVAL(seq)] /* SP acquiring list */ static VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree); #define V_spacqtree VNET(spacqtree) @@ -198,22 +310,6 @@ static struct mtx spacq_lock; #define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) #define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) -/* search order for SAs */ -static const u_int saorder_state_valid_prefer_old[] = { - SADB_SASTATE_DYING, SADB_SASTATE_MATURE, -}; -static const u_int saorder_state_valid_prefer_new[] = { - SADB_SASTATE_MATURE, SADB_SASTATE_DYING, -}; -static const u_int saorder_state_alive[] = { - /* except DEAD */ - SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL -}; -static const u_int saorder_state_any[] = { - SADB_SASTATE_MATURE, SADB_SASTATE_DYING, - SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD -}; - static const int minsize[] = { sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ sizeof(struct sadb_sa), /* SADB_EXT_SA */ @@ -241,7 +337,12 @@ static const int minsize[] = { sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ + sizeof(struct sadb_x_sa_replay), /* SADB_X_EXT_SA_REPLAY */ + sizeof(struct sadb_address), /* SADB_X_EXT_NEW_ADDRESS_SRC */ + sizeof(struct sadb_address), /* SADB_X_EXT_NEW_ADDRESS_DST */ }; +_Static_assert(sizeof(minsize)/sizeof(int) == SADB_EXT_MAX + 1, "minsize size mismatch"); + static const int maxsize[] = { sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ sizeof(struct sadb_sa), /* SADB_EXT_SA */ @@ -269,7 +370,23 @@ static const int maxsize[] = { 0, /* SADB_X_EXT_NAT_T_OAI */ 0, /* SADB_X_EXT_NAT_T_OAR */ sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ + sizeof(struct sadb_x_sa_replay), /* SADB_X_EXT_SA_REPLAY */ + 0, /* SADB_X_EXT_NEW_ADDRESS_SRC */ + 0, /* SADB_X_EXT_NEW_ADDRESS_DST */ }; +_Static_assert(sizeof(maxsize)/sizeof(int) == SADB_EXT_MAX + 1, "minsize size mismatch"); + +/* + * Internal values for SA flags: + * SADB_X_EXT_F_CLONED means that SA was cloned by key_updateaddresses, + * thus we will not free the most of SA content in key_delsav(). + */ +#define SADB_X_EXT_F_CLONED 0x80000000 + +#define SADB_CHECKLEN(_mhp, _ext) \ + ((_mhp)->extlen[(_ext)] < minsize[(_ext)] || (maxsize[(_ext)] != 0 && \ + ((_mhp)->extlen[(_ext)] > maxsize[(_ext)]))) +#define SADB_CHECKHDR(_mhp, _ext) ((_mhp)->ext[(_ext)] == NULL) static VNET_DEFINE(int, ipsec_esp_keymin) = 256; static VNET_DEFINE(int, ipsec_esp_auth) = 0; @@ -279,88 +396,75 @@ static VNET_DEFINE(int, ipsec_ah_keymin) = 128; #define V_ipsec_esp_auth VNET(ipsec_esp_auth) #define V_ipsec_ah_keymin VNET(ipsec_ah_keymin) -#ifdef SYSCTL_DECL -SYSCTL_DECL(_net_key); +#ifdef IPSEC_DEBUG +VNET_DEFINE(int, ipsec_debug) = 1; +#else +VNET_DEFINE(int, ipsec_debug) = 0; +#endif + +#ifdef INET +SYSCTL_DECL(_net_inet_ipsec); +SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEBUG, debug, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_debug), 0, + "Enable IPsec debugging output when set."); +#endif +#ifdef INET6 +SYSCTL_DECL(_net_inet6_ipsec6); +SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEBUG, debug, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_debug), 0, + "Enable IPsec debugging output when set."); #endif -SYSCTL_VNET_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, - CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, ""); +SYSCTL_DECL(_net_key); +SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, ""); /* max count of trial for the decision of spi value */ -SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, - CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, ""); /* minimum spi value to allocate automatically. */ -SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MIN_VALUE, - spi_minval, CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, ""); /* maximun spi value to allocate automatically. */ -SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MAX_VALUE, - spi_maxval, CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, ""); /* interval to initialize randseed */ -SYSCTL_VNET_INT(_net_key, KEYCTL_RANDOM_INT, - int_random, CTLFLAG_RW, &VNET_NAME(key_int_random), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_int_random), 0, ""); /* lifetime for larval SA */ -SYSCTL_VNET_INT(_net_key, KEYCTL_LARVAL_LIFETIME, - larval_lifetime, CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, ""); /* counter for blocking to send SADB_ACQUIRE to IKEd */ -SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, - blockacq_count, CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, ""); /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ -SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, - blockacq_lifetime, CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, ""); /* ESP auth */ -SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, - CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, ""); /* minimum ESP key length */ -SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_KEYMIN, - esp_keymin, CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, ""); /* minimum AH key length */ -SYSCTL_VNET_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, - CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, ""); /* perfered old SA rather than new SA */ -SYSCTL_VNET_INT(_net_key, KEYCTL_PREFERED_OLDSA, - preferred_oldsa, CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, ""); +SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, preferred_oldsa, + CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, ""); #define __LIST_CHAINED(elm) \ (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) -#define LIST_INSERT_TAIL(head, elm, type, field) \ -do {\ - struct type *curelm = LIST_FIRST(head); \ - if (curelm == NULL) {\ - LIST_INSERT_HEAD(head, elm, field); \ - } else { \ - while (LIST_NEXT(curelm, field)) \ - curelm = LIST_NEXT(curelm, field);\ - LIST_INSERT_AFTER(curelm, elm, field);\ - }\ -} while (0) - -#define KEY_CHKSASTATE(head, sav, name) \ -do { \ - if ((head) != (sav)) { \ - ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ - (name), (head), (sav))); \ - continue; \ - } \ -} while (0) - -#define KEY_CHKSPDIR(head, sp, name) \ -do { \ - if ((head) != (sp)) { \ - ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ - "anyway continue.\n", \ - (name), (head), (sp))); \ - } \ -} while (0) MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); @@ -370,6 +474,17 @@ MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); +static VNET_DEFINE(uma_zone_t, key_lft_zone); +#define V_key_lft_zone VNET(key_lft_zone) + +static LIST_HEAD(xforms_list, xformsw) xforms = LIST_HEAD_INITIALIZER(); +static struct mtx xforms_lock; +#define XFORMS_LOCK_INIT() \ + mtx_init(&xforms_lock, "xforms_list", "IPsec transforms list", MTX_DEF) +#define XFORMS_LOCK_DESTROY() mtx_destroy(&xforms_lock) +#define XFORMS_LOCK() mtx_lock(&xforms_lock) +#define XFORMS_UNLOCK() mtx_unlock(&xforms_lock) + /* * set parameters into secpolicyindex buffer. * Must allocate secpolicyindex buffer passed to this function. @@ -397,6 +512,8 @@ do { \ (idx)->reqid = (r); \ bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ + key_porttosaddr(&(idx)->src.sa, 0); \ + key_porttosaddr(&(idx)->dst.sa, 0); \ } while (0) /* key statistics */ @@ -411,176 +528,206 @@ struct sadb_msghdr { int extlen[SADB_EXT_MAX + 1]; }; -static struct secasvar *key_allocsa_policy __P((const struct secasindex *)); -static void key_freesp_so __P((struct secpolicy **)); -static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); -static void key_delsp __P((struct secpolicy *)); -static struct secpolicy *key_getsp __P((struct secpolicyindex *)); -static void _key_delsp(struct secpolicy *sp); -static struct secpolicy *key_getspbyid __P((u_int32_t)); -static u_int32_t key_newreqid __P((void)); -static struct mbuf *key_gather_mbuf __P((struct mbuf *, - const struct sadb_msghdr *, int, int, ...)); -static int key_spdadd __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static u_int32_t key_getnewspid __P((void)); -static int key_spddelete __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_spddelete2 __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_spdget __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_spdflush __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_spddump __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static struct mbuf *key_setdumpsp __P((struct secpolicy *, - u_int8_t, u_int32_t, u_int32_t)); -static u_int key_getspreqmsglen __P((struct secpolicy *)); -static int key_spdexpire __P((struct secpolicy *)); -static struct secashead *key_newsah __P((struct secasindex *)); -static void key_delsah __P((struct secashead *)); -static struct secasvar *key_newsav __P((struct mbuf *, - const struct sadb_msghdr *, struct secashead *, int *, - const char*, int)); -#define KEY_NEWSAV(m, sadb, sah, e) \ - key_newsav(m, sadb, sah, e, __FILE__, __LINE__) -static void key_delsav __P((struct secasvar *)); -static struct secashead *key_getsah __P((struct secasindex *)); -static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); -static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); -static int key_setsaval __P((struct secasvar *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_mature __P((struct secasvar *)); -static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, - u_int8_t, u_int32_t, u_int32_t)); -static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, - u_int32_t, pid_t, u_int16_t)); -static struct mbuf *key_setsadbsa __P((struct secasvar *)); -static struct mbuf *key_setsadbaddr __P((u_int16_t, - const struct sockaddr *, u_int8_t, u_int16_t)); -#ifdef IPSEC_NAT_T +static struct supported_ealgs { + int sadb_alg; + const struct enc_xform *xform; +} supported_ealgs[] = { + { SADB_EALG_DESCBC, &enc_xform_des }, + { SADB_EALG_3DESCBC, &enc_xform_3des }, + { SADB_X_EALG_AES, &enc_xform_rijndael128 }, + { SADB_X_EALG_BLOWFISHCBC, &enc_xform_blf }, + { SADB_X_EALG_CAST128CBC, &enc_xform_cast5 }, + { SADB_EALG_NULL, &enc_xform_null }, + { SADB_X_EALG_CAMELLIACBC, &enc_xform_camellia }, + { SADB_X_EALG_AESCTR, &enc_xform_aes_icm }, + { SADB_X_EALG_AESGCM16, &enc_xform_aes_nist_gcm }, + { SADB_X_EALG_AESGMAC, &enc_xform_aes_nist_gmac }, +}; + +static struct supported_aalgs { + int sadb_alg; + const struct auth_hash *xform; +} supported_aalgs[] = { + { SADB_X_AALG_NULL, &auth_hash_null }, + { SADB_AALG_MD5HMAC, &auth_hash_hmac_md5 }, + { SADB_AALG_SHA1HMAC, &auth_hash_hmac_sha1 }, + { SADB_X_AALG_RIPEMD160HMAC, &auth_hash_hmac_ripemd_160 }, + { SADB_X_AALG_MD5, &auth_hash_key_md5 }, + { SADB_X_AALG_SHA, &auth_hash_key_sha1 }, + { SADB_X_AALG_SHA2_256, &auth_hash_hmac_sha2_256 }, + { SADB_X_AALG_SHA2_384, &auth_hash_hmac_sha2_384 }, + { SADB_X_AALG_SHA2_512, &auth_hash_hmac_sha2_512 }, + { SADB_X_AALG_AES128GMAC, &auth_hash_nist_gmac_aes_128 }, + { SADB_X_AALG_AES192GMAC, &auth_hash_nist_gmac_aes_192 }, + { SADB_X_AALG_AES256GMAC, &auth_hash_nist_gmac_aes_256 }, +}; + +static struct supported_calgs { + int sadb_alg; + const struct comp_algo *xform; +} supported_calgs[] = { + { SADB_X_CALG_DEFLATE, &comp_algo_deflate }, +}; + +#ifndef IPSEC_DEBUG2 +static struct callout key_timer; +#endif + +static void key_unlink(struct secpolicy *); +static struct secpolicy *key_getsp(struct secpolicyindex *); +static struct secpolicy *key_getspbyid(u_int32_t); +static struct mbuf *key_gather_mbuf(struct mbuf *, + const struct sadb_msghdr *, int, int, ...); +static int key_spdadd(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static uint32_t key_getnewspid(void); +static int key_spddelete(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spddelete2(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spdget(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spdflush(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_spddump(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static struct mbuf *key_setdumpsp(struct secpolicy *, + u_int8_t, u_int32_t, u_int32_t); +static struct mbuf *key_sp2mbuf(struct secpolicy *); +static size_t key_getspreqmsglen(struct secpolicy *); +static int key_spdexpire(struct secpolicy *); +static struct secashead *key_newsah(struct secasindex *); +static void key_freesah(struct secashead **); +static void key_delsah(struct secashead *); +static struct secasvar *key_newsav(const struct sadb_msghdr *, + struct secasindex *, uint32_t, int *); +static void key_delsav(struct secasvar *); +static void key_unlinksav(struct secasvar *); +static struct secashead *key_getsah(struct secasindex *); +static int key_checkspidup(uint32_t); +static struct secasvar *key_getsavbyspi(uint32_t); +static int key_setnatt(struct secasvar *, const struct sadb_msghdr *); +static int key_setsaval(struct secasvar *, const struct sadb_msghdr *); +static int key_updatelifetimes(struct secasvar *, const struct sadb_msghdr *); +static int key_updateaddresses(struct socket *, struct mbuf *, + const struct sadb_msghdr *, struct secasvar *, struct secasindex *); + +static struct mbuf *key_setdumpsa(struct secasvar *, u_int8_t, + u_int8_t, u_int32_t, u_int32_t); +static struct mbuf *key_setsadbmsg(u_int8_t, u_int16_t, u_int8_t, + u_int32_t, pid_t, u_int16_t); +static struct mbuf *key_setsadbsa(struct secasvar *); +static struct mbuf *key_setsadbaddr(u_int16_t, + const struct sockaddr *, u_int8_t, u_int16_t); static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t); static struct mbuf *key_setsadbxtype(u_int16_t); -#endif -static void key_porttosaddr(struct sockaddr *, u_int16_t); -#define KEY_PORTTOSADDR(saddr, port) \ - key_porttosaddr((struct sockaddr *)(saddr), (port)) -static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); -static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, - u_int32_t)); -static struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, - struct malloc_type *); +static struct mbuf *key_setsadbxsa2(u_int8_t, u_int32_t, u_int32_t); +static struct mbuf *key_setsadbxsareplay(u_int32_t); +static struct mbuf *key_setsadbxpolicy(u_int16_t, u_int8_t, + u_int32_t, u_int32_t); +static struct seckey *key_dup_keymsg(const struct sadb_key *, size_t, + struct malloc_type *); static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, - struct malloc_type *type); -#ifdef INET6 -static int key_ismyaddr6 __P((struct sockaddr_in6 *)); -#endif + struct malloc_type *); /* flags for key_cmpsaidx() */ #define CMP_HEAD 1 /* protocol, addresses. */ #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ #define CMP_REQID 3 /* additionally HEAD, reaid. */ #define CMP_EXACTLY 4 /* all elements. */ -static int key_cmpsaidx - __P((const struct secasindex *, const struct secasindex *, int)); - -static int key_cmpspidx_exactly - __P((struct secpolicyindex *, struct secpolicyindex *)); -static int key_cmpspidx_withmask - __P((struct secpolicyindex *, struct secpolicyindex *)); -static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); -static int key_bbcmp __P((const void *, const void *, u_int)); -static u_int16_t key_satype2proto __P((u_int8_t)); -static u_int8_t key_proto2satype __P((u_int16_t)); - -static int key_getspi __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static u_int32_t key_do_getnewspi __P((struct sadb_spirange *, - struct secasindex *)); -static int key_update __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -#ifdef IPSEC_DOSEQCHECK -static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); -#endif -static int key_add __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_setident __P((struct secashead *, struct mbuf *, - const struct sadb_msghdr *)); -static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, - const struct sadb_msghdr *)); -static int key_delete __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_get __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); - -static void key_getcomb_setlifetime __P((struct sadb_comb *)); -static struct mbuf *key_getcomb_esp __P((void)); -static struct mbuf *key_getcomb_ah __P((void)); -static struct mbuf *key_getcomb_ipcomp __P((void)); -static struct mbuf *key_getprop __P((const struct secasindex *)); - -static int key_acquire __P((const struct secasindex *, struct secpolicy *)); -static struct secacq *key_newacq __P((const struct secasindex *)); -static struct secacq *key_getacq __P((const struct secasindex *)); -static struct secacq *key_getacqbyseq __P((u_int32_t)); -static struct secspacq *key_newspacq __P((struct secpolicyindex *)); -static struct secspacq *key_getspacq __P((struct secpolicyindex *)); -static int key_acquire2 __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_register __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_expire __P((struct secasvar *)); -static int key_flush __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_dump __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_promisc __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)); -static int key_senderror __P((struct socket *, struct mbuf *, int)); -static int key_validate_ext __P((const struct sadb_ext *, int)); -static int key_align __P((struct mbuf *, struct sadb_msghdr *)); -static struct mbuf *key_setlifetime(struct seclifetime *src, - u_int16_t exttype); -static struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); - -#if 0 -static const char *key_getfqdn __P((void)); -static const char *key_getuserfqdn __P((void)); -#endif -static void key_sa_chgstate __P((struct secasvar *, u_int8_t)); -static struct mbuf *key_alloc_mbuf __P((int)); - -static __inline void -sa_initref(struct secasvar *sav) -{ +static int key_cmpsaidx(const struct secasindex *, + const struct secasindex *, int); +static int key_cmpspidx_exactly(struct secpolicyindex *, + struct secpolicyindex *); +static int key_cmpspidx_withmask(struct secpolicyindex *, + struct secpolicyindex *); +static int key_bbcmp(const void *, const void *, u_int); +static uint8_t key_satype2proto(uint8_t); +static uint8_t key_proto2satype(uint8_t); + +static int key_getspi(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static uint32_t key_do_getnewspi(struct sadb_spirange *, struct secasindex *); +static int key_update(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_add(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_setident(struct secashead *, const struct sadb_msghdr *); +static struct mbuf *key_getmsgbuf_x1(struct mbuf *, + const struct sadb_msghdr *); +static int key_delete(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_delete_all(struct socket *, struct mbuf *, + const struct sadb_msghdr *, struct secasindex *); +static void key_delete_xform(const struct xformsw *); +static int key_get(struct socket *, struct mbuf *, + const struct sadb_msghdr *); + +static void key_getcomb_setlifetime(struct sadb_comb *); +static struct mbuf *key_getcomb_ealg(void); +static struct mbuf *key_getcomb_ah(void); +static struct mbuf *key_getcomb_ipcomp(void); +static struct mbuf *key_getprop(const struct secasindex *); + +static int key_acquire(const struct secasindex *, struct secpolicy *); +static uint32_t key_newacq(const struct secasindex *, int *); +static uint32_t key_getacq(const struct secasindex *, int *); +static int key_acqdone(const struct secasindex *, uint32_t); +static int key_acqreset(uint32_t); +static struct secspacq *key_newspacq(struct secpolicyindex *); +static struct secspacq *key_getspacq(struct secpolicyindex *); +static int key_acquire2(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_register(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_expire(struct secasvar *, int); +static int key_flush(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_dump(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_promisc(struct socket *, struct mbuf *, + const struct sadb_msghdr *); +static int key_senderror(struct socket *, struct mbuf *, int); +static int key_validate_ext(const struct sadb_ext *, int); +static int key_align(struct mbuf *, struct sadb_msghdr *); +static struct mbuf *key_setlifetime(struct seclifetime *, uint16_t); +static struct mbuf *key_setkey(struct seckey *, uint16_t); +static int xform_init(struct secasvar *, u_short); + +#define DBG_IPSEC_INITREF(t, p) do { \ + refcount_init(&(p)->refcnt, 1); \ + KEYDBG(KEY_STAMP, \ + printf("%s: Initialize refcnt %s(%p) = %u\n", \ + __func__, #t, (p), (p)->refcnt)); \ +} while (0) +#define DBG_IPSEC_ADDREF(t, p) do { \ + refcount_acquire(&(p)->refcnt); \ + KEYDBG(KEY_STAMP, \ + printf("%s: Acquire refcnt %s(%p) -> %u\n", \ + __func__, #t, (p), (p)->refcnt)); \ +} while (0) +#define DBG_IPSEC_DELREF(t, p) do { \ + KEYDBG(KEY_STAMP, \ + printf("%s: Release refcnt %s(%p) -> %u\n", \ + __func__, #t, (p), (p)->refcnt - 1)); \ + refcount_release(&(p)->refcnt); \ +} while (0) - refcount_init(&sav->refcnt, 1); -} -static __inline void -sa_addref(struct secasvar *sav) -{ +#define IPSEC_INITREF(t, p) refcount_init(&(p)->refcnt, 1) +#define IPSEC_ADDREF(t, p) refcount_acquire(&(p)->refcnt) +#define IPSEC_DELREF(t, p) refcount_release(&(p)->refcnt) - refcount_acquire(&sav->refcnt); - IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); -} -static __inline int -sa_delref(struct secasvar *sav) -{ +#define SP_INITREF(p) IPSEC_INITREF(SP, p) +#define SP_ADDREF(p) IPSEC_ADDREF(SP, p) +#define SP_DELREF(p) IPSEC_DELREF(SP, p) - IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); - return (refcount_release(&sav->refcnt)); -} +#define SAH_INITREF(p) IPSEC_INITREF(SAH, p) +#define SAH_ADDREF(p) IPSEC_ADDREF(SAH, p) +#define SAH_DELREF(p) IPSEC_DELREF(SAH, p) -#define SP_ADDREF(p) do { \ - (p)->refcnt++; \ - IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ -} while (0) -#define SP_DELREF(p) do { \ - IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ - (p)->refcnt--; \ -} while (0) - +#define SAV_INITREF(p) IPSEC_INITREF(SAV, p) +#define SAV_ADDREF(p) IPSEC_ADDREF(SAV, p) +#define SAV_DELREF(p) IPSEC_DELREF(SAV, p) /* * Update the refcnt while holding the SPTREE lock. @@ -588,9 +735,8 @@ sa_delref(struct secasvar *sav) void key_addref(struct secpolicy *sp) { - SPTREE_LOCK(); + SP_ADDREF(sp); - SPTREE_UNLOCK(); } /* @@ -603,60 +749,54 @@ key_havesp(u_int dir) { return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? - LIST_FIRST(&V_sptree[dir]) != NULL : 1); + TAILQ_FIRST(&V_sptree[dir]) != NULL : 1); } /* %%% IPsec policy management */ /* - * allocating a SP for OUTBOUND or INBOUND packet. - * Must call key_freesp() later. - * OUT: NULL: not found - * others: found and return the pointer. + * Return current SPDB generation. */ -struct secpolicy * -key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) +uint32_t +key_getspgen(void) { - struct secpolicy *sp; - IPSEC_ASSERT(spidx != NULL, ("null spidx")); - IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, - ("invalid direction %u", dir)); - - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s from %s:%u\n", __func__, where, tag)); + return (V_sp_genid); +} - /* get a SP entry */ - KEYDEBUG(KEYDEBUG_IPSEC_DATA, - printf("*** objects\n"); - kdebug_secpolicyindex(spidx)); +void +key_bumpspgen(void) +{ - SPTREE_LOCK(); - LIST_FOREACH(sp, &V_sptree[dir], chain) { - KEYDEBUG(KEYDEBUG_IPSEC_DATA, - printf("*** in SPD\n"); - kdebug_secpolicyindex(&sp->spidx)); + V_sp_genid++; +} - if (sp->state == IPSEC_SPSTATE_DEAD) - continue; - if (key_cmpspidx_withmask(&sp->spidx, spidx)) - goto found; - } - sp = NULL; -found: - if (sp) { - /* sanity check */ - KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); +static int +key_checksockaddrs(struct sockaddr *src, struct sockaddr *dst) +{ - /* found a SPD entry */ - sp->lastused = time_second; - SP_ADDREF(sp); + /* family match */ + if (src->sa_family != dst->sa_family) + return (EINVAL); + /* sa_len match */ + if (src->sa_len != dst->sa_len) + return (EINVAL); + switch (src->sa_family) { +#ifdef INET + case AF_INET: + if (src->sa_len != sizeof(struct sockaddr_in)) + return (EINVAL); + break; +#endif +#ifdef INET6 + case AF_INET6: + if (src->sa_len != sizeof(struct sockaddr_in6)) + return (EINVAL); + break; +#endif + default: + return (EAFNOSUPPORT); } - SPTREE_UNLOCK(); - - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, - sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); - return sp; + return (0); } /* @@ -666,577 +806,415 @@ found: * others: found and return the pointer. */ struct secpolicy * -key_allocsp2(u_int32_t spi, - union sockaddr_union *dst, - u_int8_t proto, - u_int dir, - const char* where, int tag) +key_allocsp(struct secpolicyindex *spidx, u_int dir) { + SPTREE_RLOCK_TRACKER; struct secpolicy *sp; - IPSEC_ASSERT(dst != NULL, ("null dst")); + IPSEC_ASSERT(spidx != NULL, ("null spidx")); IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, ("invalid direction %u", dir)); - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s from %s:%u\n", __func__, where, tag)); - - /* get a SP entry */ - KEYDEBUG(KEYDEBUG_IPSEC_DATA, - printf("*** objects\n"); - printf("spi %u proto %u dir %u\n", spi, proto, dir); - kdebug_sockaddr(&dst->sa)); - - SPTREE_LOCK(); - LIST_FOREACH(sp, &V_sptree[dir], chain) { - KEYDEBUG(KEYDEBUG_IPSEC_DATA, - printf("*** in SPD\n"); - kdebug_secpolicyindex(&sp->spidx)); - - if (sp->state == IPSEC_SPSTATE_DEAD) - continue; - /* compare simple values, then dst address */ - if (sp->spidx.ul_proto != proto) - continue; - /* NB: spi's must exist and match */ - if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) - continue; - if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) - goto found; + SPTREE_RLOCK(); + TAILQ_FOREACH(sp, &V_sptree[dir], chain) { + if (key_cmpspidx_withmask(&sp->spidx, spidx)) { + SP_ADDREF(sp); + break; + } } - sp = NULL; -found: - if (sp) { - /* sanity check */ - KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); + SPTREE_RUNLOCK(); - /* found a SPD entry */ + if (sp != NULL) { /* found a SPD entry */ sp->lastused = time_second; - SP_ADDREF(sp); + KEYDBG(IPSEC_STAMP, + printf("%s: return SP(%p)\n", __func__, sp)); + KEYDBG(IPSEC_DATA, kdebug_secpolicy(sp)); + } else { + KEYDBG(IPSEC_DATA, + printf("%s: lookup failed for ", __func__); + kdebug_secpolicyindex(spidx, NULL)); } - SPTREE_UNLOCK(); - - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, - sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); - return sp; + return (sp); } -#if 0 /* - * return a policy that matches this particular inbound packet. - * XXX slow + * Allocating an SA entry for an *INBOUND* or *OUTBOUND* TCP packet, signed + * or should be signed by MD5 signature. + * We don't use key_allocsa() for such lookups, because we don't know SPI. + * Unlike ESP and AH protocols, SPI isn't transmitted in the TCP header with + * signed packet. We use SADB only as storage for password. + * OUT: positive: corresponding SA for given saidx found. + * NULL: SA not found */ -struct secpolicy * -key_gettunnel(const struct sockaddr *osrc, - const struct sockaddr *odst, - const struct sockaddr *isrc, - const struct sockaddr *idst, - const char* where, int tag) +struct secasvar * +key_allocsa_tcpmd5(struct secasindex *saidx) { - struct secpolicy *sp; - const int dir = IPSEC_DIR_INBOUND; - struct ipsecrequest *r1, *r2, *p; - struct secpolicyindex spidx; - - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s from %s:%u\n", __func__, where, tag)); - - if (isrc->sa_family != idst->sa_family) { - ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", - __func__, isrc->sa_family, idst->sa_family)); - sp = NULL; - goto done; - } + SAHTREE_RLOCK_TRACKER; + struct secashead *sah; + struct secasvar *sav; - SPTREE_LOCK(); - LIST_FOREACH(sp, &V_sptree[dir], chain) { - if (sp->state == IPSEC_SPSTATE_DEAD) + IPSEC_ASSERT(saidx->proto == IPPROTO_TCP, + ("unexpected security protocol %u", saidx->proto)); + IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TCPMD5, + ("unexpected mode %u", saidx->mode)); + + SAHTREE_RLOCK(); + LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) { + KEYDBG(IPSEC_DUMP, + printf("%s: checking SAH\n", __func__); + kdebug_secash(sah, " ")); + if (sah->saidx.proto != IPPROTO_TCP) continue; - - r1 = r2 = NULL; - for (p = sp->req; p; p = p->next) { - if (p->saidx.mode != IPSEC_MODE_TUNNEL) - continue; - - r1 = r2; - r2 = p; - - if (!r1) { - /* here we look at address matches only */ - spidx = sp->spidx; - if (isrc->sa_len > sizeof(spidx.src) || - idst->sa_len > sizeof(spidx.dst)) - continue; - bcopy(isrc, &spidx.src, isrc->sa_len); - bcopy(idst, &spidx.dst, idst->sa_len); - if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) - continue; - } else { - if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || - key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) - continue; - } - - if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || - key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) - continue; - - goto found; - } + if (!key_sockaddrcmp(&saidx->dst.sa, &sah->saidx.dst.sa, 0)) + break; } - sp = NULL; -found: - if (sp) { - sp->lastused = time_second; - SP_ADDREF(sp); + if (sah != NULL) { + if (V_key_preferred_oldsa) + sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue); + else + sav = TAILQ_FIRST(&sah->savtree_alive); + if (sav != NULL) + SAV_ADDREF(sav); + } else + sav = NULL; + SAHTREE_RUNLOCK(); + + if (sav != NULL) { + KEYDBG(IPSEC_STAMP, + printf("%s: return SA(%p)\n", __func__, sav)); + KEYDBG(IPSEC_DATA, kdebug_secasv(sav)); + } else { + KEYDBG(IPSEC_STAMP, + printf("%s: SA not found\n", __func__)); + KEYDBG(IPSEC_DATA, kdebug_secasindex(saidx, NULL)); } - SPTREE_UNLOCK(); -done: - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, - sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); - return sp; + return (sav); } -#endif /* - * allocating an SA entry for an *OUTBOUND* packet. - * checking each request entries in SP, and acquire an SA if need. - * OUT: 0: there are valid requests. - * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. + * Allocating an SA entry for an *OUTBOUND* packet. + * OUT: positive: corresponding SA for given saidx found. + * NULL: SA not found, but will be acquired, check *error + * for acquiring status. */ -int -key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) +struct secasvar * +key_allocsa_policy(struct secpolicy *sp, const struct secasindex *saidx, + int *error) { - u_int level; - int error; + SAHTREE_RLOCK_TRACKER; + struct secashead *sah; struct secasvar *sav; - IPSEC_ASSERT(isr != NULL, ("null isr")); IPSEC_ASSERT(saidx != NULL, ("null saidx")); IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || saidx->mode == IPSEC_MODE_TUNNEL, ("unexpected policy %u", saidx->mode)); /* - * XXX guard against protocol callbacks from the crypto - * thread as they reference ipsecrequest.sav which we - * temporarily null out below. Need to rethink how we - * handle bundled SA's in the callback thread. - */ - IPSECREQUEST_LOCK_ASSERT(isr); - - /* get current level */ - level = ipsec_get_reqlevel(isr); - - /* * We check new SA in the IPsec request because a different * SA may be involved each time this request is checked, either * because new SAs are being configured, or this request is * associated with an unconnected datagram socket, or this request * is associated with a system default policy. - * - * key_allocsa_policy should allocate the oldest SA available. - * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. */ - sav = key_allocsa_policy(saidx); - if (sav != isr->sav) { - /* SA need to be updated. */ - if (!IPSECREQUEST_UPGRADE(isr)) { - /* Kick everyone off. */ - IPSECREQUEST_UNLOCK(isr); - IPSECREQUEST_WLOCK(isr); - } - if (isr->sav != NULL) - KEY_FREESAV(&isr->sav); - isr->sav = sav; - IPSECREQUEST_DOWNGRADE(isr); - } else if (sav != NULL) - KEY_FREESAV(&sav); - - /* When there is SA. */ - if (isr->sav != NULL) { - if (isr->sav->state != SADB_SASTATE_MATURE && - isr->sav->state != SADB_SASTATE_DYING) - return EINVAL; - return 0; - } - - /* there is no SA */ - error = key_acquire(saidx, isr->sp); - if (error != 0) { - /* XXX What should I do ? */ - ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", - __func__, error)); - return error; - } - - if (level != IPSEC_LEVEL_REQUIRE) { - /* XXX sigh, the interface to this routine is botched */ - IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); - return 0; - } else { - return ENOENT; - } -} - -/* - * allocating a SA for policy entry from SAD. - * NOTE: searching SAD of aliving state. - * OUT: NULL: not found. - * others: found and return the pointer. - */ -static struct secasvar * -key_allocsa_policy(const struct secasindex *saidx) -{ -#define N(a) _ARRAYLEN(a) - struct secashead *sah; - struct secasvar *sav; - u_int stateidx, arraysize; - const u_int *state_valid; - - state_valid = NULL; /* silence gcc */ - arraysize = 0; /* silence gcc */ - - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (sah->state == SADB_SASTATE_DEAD) - continue; - if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { - if (V_key_preferred_oldsa) { - state_valid = saorder_state_valid_prefer_old; - arraysize = N(saorder_state_valid_prefer_old); - } else { - state_valid = saorder_state_valid_prefer_new; - arraysize = N(saorder_state_valid_prefer_new); - } + SAHTREE_RLOCK(); + LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) { + KEYDBG(IPSEC_DUMP, + printf("%s: checking SAH\n", __func__); + kdebug_secash(sah, " ")); + if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) break; - } - } - SAHTREE_UNLOCK(); - if (sah == NULL) - return NULL; - /* search valid state */ - for (stateidx = 0; stateidx < arraysize; stateidx++) { - sav = key_do_allocsa_policy(sah, state_valid[stateidx]); - if (sav != NULL) - return sav; } - - return NULL; -#undef N -} - -/* - * searching SAD with direction, protocol, mode and state. - * called by key_allocsa_policy(). - * OUT: - * NULL : not found - * others : found, pointer to a SA. - */ -static struct secasvar * -key_do_allocsa_policy(struct secashead *sah, u_int state) -{ - struct secasvar *sav, *nextsav, *candidate, *d; - - /* initilize */ - candidate = NULL; - - SAHTREE_LOCK(); - for (sav = LIST_FIRST(&sah->savtree[state]); - sav != NULL; - sav = nextsav) { - - nextsav = LIST_NEXT(sav, chain); - - /* sanity check */ - KEY_CHKSASTATE(sav->state, state, __func__); - - /* initialize */ - if (candidate == NULL) { - candidate = sav; - continue; - } - - /* Which SA is the better ? */ - - IPSEC_ASSERT(candidate->lft_c != NULL, - ("null candidate lifetime")); - IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); - - /* What the best method is to compare ? */ - if (V_key_preferred_oldsa) { - if (candidate->lft_c->addtime > - sav->lft_c->addtime) { - candidate = sav; - } - continue; - /*NOTREACHED*/ - } - - /* preferred new sa rather than old sa */ - if (candidate->lft_c->addtime < - sav->lft_c->addtime) { - d = candidate; - candidate = sav; - } else - d = sav; - + if (sah != NULL) { /* - * prepared to delete the SA when there is more - * suitable candidate and the lifetime of the SA is not - * permanent. + * Allocate the oldest SA available according to + * draft-jenkins-ipsec-rekeying-03. */ - if (d->lft_h->addtime != 0) { - struct mbuf *m, *result; - u_int8_t satype; - - key_sa_chgstate(d, SADB_SASTATE_DEAD); - - IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); - - satype = key_proto2satype(d->sah->saidx.proto); - if (satype == 0) - goto msgfail; - - m = key_setsadbmsg(SADB_DELETE, 0, - satype, 0, 0, d->refcnt - 1); - if (!m) - goto msgfail; - result = m; - - /* set sadb_address for saidx's. */ - m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, - &d->sah->saidx.src.sa, - d->sah->saidx.src.sa.sa_len << 3, - IPSEC_ULPROTO_ANY); - if (!m) - goto msgfail; - m_cat(result, m); - - /* set sadb_address for saidx's. */ - m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, - &d->sah->saidx.dst.sa, - d->sah->saidx.dst.sa.sa_len << 3, - IPSEC_ULPROTO_ANY); - if (!m) - goto msgfail; - m_cat(result, m); - - /* create SA extension */ - m = key_setsadbsa(d); - if (!m) - goto msgfail; - m_cat(result, m); - - if (result->m_len < sizeof(struct sadb_msg)) { - result = m_pullup(result, - sizeof(struct sadb_msg)); - if (result == NULL) - goto msgfail; - } - - result->m_pkthdr.len = 0; - for (m = result; m; m = m->m_next) - result->m_pkthdr.len += m->m_len; - mtod(result, struct sadb_msg *)->sadb_msg_len = - PFKEY_UNIT64(result->m_pkthdr.len); + if (V_key_preferred_oldsa) + sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue); + else + sav = TAILQ_FIRST(&sah->savtree_alive); + if (sav != NULL) + SAV_ADDREF(sav); + } else + sav = NULL; + SAHTREE_RUNLOCK(); - if (key_sendup_mbuf(NULL, result, - KEY_SENDUP_REGISTERED)) - goto msgfail; - msgfail: - KEY_FREESAV(&d); - } - } - if (candidate) { - sa_addref(candidate); - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s cause refcnt++:%d SA:%p\n", - __func__, candidate->refcnt, candidate)); + if (sav != NULL) { + *error = 0; + KEYDBG(IPSEC_STAMP, + printf("%s: chosen SA(%p) for SP(%p)\n", __func__, + sav, sp)); + KEYDBG(IPSEC_DATA, kdebug_secasv(sav)); + return (sav); /* return referenced SA */ } - SAHTREE_UNLOCK(); - return candidate; + /* there is no SA */ + *error = key_acquire(saidx, sp); + if ((*error) != 0) + ipseclog((LOG_DEBUG, + "%s: error %d returned from key_acquire()\n", + __func__, *error)); + KEYDBG(IPSEC_STAMP, + printf("%s: acquire SA for SP(%p), error %d\n", + __func__, sp, *error)); + KEYDBG(IPSEC_DATA, kdebug_secasindex(saidx, NULL)); + return (NULL); } /* * allocating a usable SA entry for a *INBOUND* packet. * Must call key_freesav() later. * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). - * NULL: not found, or error occured. + * NULL: not found, or error occurred. + * + * According to RFC 2401 SA is uniquely identified by a triple SPI, + * destination address, and security protocol. But according to RFC 4301, + * SPI by itself suffices to specify an SA. * - * In the comparison, no source address is used--for RFC2401 conformance. - * To quote, from section 4.1: - * A security association is uniquely identified by a triple consisting - * of a Security Parameter Index (SPI), an IP Destination Address, and a - * security protocol (AH or ESP) identifier. * Note that, however, we do need to keep source address in IPsec SA. * IKE specification and PF_KEY specification do assume that we * keep source address in IPsec SA. We see a tricky situation here. */ struct secasvar * -key_allocsa( - union sockaddr_union *dst, - u_int proto, - u_int32_t spi, - const char* where, int tag) +key_allocsa(union sockaddr_union *dst, uint8_t proto, uint32_t spi) { - struct secashead *sah; + SAHTREE_RLOCK_TRACKER; struct secasvar *sav; - u_int stateidx, arraysize, state; - const u_int *saorder_state_valid; - int chkport; - - IPSEC_ASSERT(dst != NULL, ("null dst address")); - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s from %s:%u\n", __func__, where, tag)); - -#ifdef IPSEC_NAT_T - chkport = (dst->sa.sa_family == AF_INET && - dst->sa.sa_len == sizeof(struct sockaddr_in) && - dst->sin.sin_port != 0); -#else - chkport = 0; -#endif + IPSEC_ASSERT(proto == IPPROTO_ESP || proto == IPPROTO_AH || + proto == IPPROTO_IPCOMP, ("unexpected security protocol %u", + proto)); + SAHTREE_RLOCK(); + LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) { + if (sav->spi == spi) + break; + } /* - * searching SAD. - * XXX: to be checked internal IP header somewhere. Also when - * IPsec tunnel packet is received. But ESP tunnel mode is - * encrypted so we can't check internal IP header. + * We use single SPI namespace for all protocols, so it is + * impossible to have SPI duplicates in the SAVHASH. */ - SAHTREE_LOCK(); - if (V_key_preferred_oldsa) { - saorder_state_valid = saorder_state_valid_prefer_old; - arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); + if (sav != NULL) { + if (sav->state != SADB_SASTATE_LARVAL && + sav->sah->saidx.proto == proto && + key_sockaddrcmp(&dst->sa, + &sav->sah->saidx.dst.sa, 0) == 0) + SAV_ADDREF(sav); + else + sav = NULL; + } + SAHTREE_RUNLOCK(); + + if (sav == NULL) { + KEYDBG(IPSEC_STAMP, + char buf[IPSEC_ADDRSTRLEN]; + printf("%s: SA not found for spi %u proto %u dst %s\n", + __func__, ntohl(spi), proto, ipsec_address(dst, buf, + sizeof(buf)))); } else { - saorder_state_valid = saorder_state_valid_prefer_new; - arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); - } - LIST_FOREACH(sah, &V_sahtree, chain) { - /* search valid state */ - for (stateidx = 0; stateidx < arraysize; stateidx++) { - state = saorder_state_valid[stateidx]; - LIST_FOREACH(sav, &sah->savtree[state], chain) { - /* sanity check */ - KEY_CHKSASTATE(sav->state, state, __func__); - /* do not return entries w/ unusable state */ - if (sav->state != SADB_SASTATE_MATURE && - sav->state != SADB_SASTATE_DYING) - continue; - if (proto != sav->sah->saidx.proto) - continue; - if (spi != sav->spi) - continue; -#if 0 /* don't check src */ - /* check src address */ - if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, chkport) != 0) - continue; -#endif - /* check dst address */ - if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) - continue; - sa_addref(sav); - goto done; - } - } + KEYDBG(IPSEC_STAMP, + printf("%s: return SA(%p)\n", __func__, sav)); + KEYDBG(IPSEC_DATA, kdebug_secasv(sav)); } - sav = NULL; -done: - SAHTREE_UNLOCK(); + return (sav); +} + +struct secasvar * +key_allocsa_tunnel(union sockaddr_union *src, union sockaddr_union *dst, + uint8_t proto) +{ + SAHTREE_RLOCK_TRACKER; + struct secasindex saidx; + struct secashead *sah; + struct secasvar *sav; + + IPSEC_ASSERT(src != NULL, ("null src address")); + IPSEC_ASSERT(dst != NULL, ("null dst address")); + + KEY_SETSECASIDX(proto, IPSEC_MODE_TUNNEL, 0, &src->sa, + &dst->sa, &saidx); - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s return SA:%p; refcnt %u\n", __func__, - sav, sav ? sav->refcnt : 0)); - return sav; + sav = NULL; + SAHTREE_RLOCK(); + LIST_FOREACH(sah, SAHADDRHASH_HASH(&saidx), addrhash) { + if (IPSEC_MODE_TUNNEL != sah->saidx.mode) + continue; + if (proto != sah->saidx.proto) + continue; + if (key_sockaddrcmp(&src->sa, &sah->saidx.src.sa, 0) != 0) + continue; + if (key_sockaddrcmp(&dst->sa, &sah->saidx.dst.sa, 0) != 0) + continue; + /* XXXAE: is key_preferred_oldsa reasonably?*/ + if (V_key_preferred_oldsa) + sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue); + else + sav = TAILQ_FIRST(&sah->savtree_alive); + if (sav != NULL) { + SAV_ADDREF(sav); + break; + } + } + SAHTREE_RUNLOCK(); + KEYDBG(IPSEC_STAMP, + printf("%s: return SA(%p)\n", __func__, sav)); + if (sav != NULL) + KEYDBG(IPSEC_DATA, kdebug_secasv(sav)); + return (sav); } /* * Must be called after calling key_allocsp(). - * For both the packet without socket and key_freeso(). */ void -_key_freesp(struct secpolicy **spp, const char* where, int tag) +key_freesp(struct secpolicy **spp) { struct secpolicy *sp = *spp; IPSEC_ASSERT(sp != NULL, ("null sp")); + if (SP_DELREF(sp) == 0) + return; - SPTREE_LOCK(); - SP_DELREF(sp); + KEYDBG(IPSEC_STAMP, + printf("%s: last reference to SP(%p)\n", __func__, sp)); + KEYDBG(IPSEC_DATA, kdebug_secpolicy(sp)); + + *spp = NULL; + while (sp->tcount > 0) + ipsec_delisr(sp->req[--sp->tcount]); + free(sp, M_IPSEC_SP); +} - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", - __func__, sp, sp->id, where, tag, sp->refcnt)); +static void +key_unlink(struct secpolicy *sp) +{ - if (sp->refcnt == 0) { - *spp = NULL; - key_delsp(sp); + IPSEC_ASSERT(sp->spidx.dir == IPSEC_DIR_INBOUND || + sp->spidx.dir == IPSEC_DIR_OUTBOUND, + ("invalid direction %u", sp->spidx.dir)); + SPTREE_UNLOCK_ASSERT(); + + KEYDBG(KEY_STAMP, + printf("%s: SP(%p)\n", __func__, sp)); + SPTREE_WLOCK(); + if (sp->state != IPSEC_SPSTATE_ALIVE) { + /* SP is already unlinked */ + SPTREE_WUNLOCK(); + return; } - SPTREE_UNLOCK(); + sp->state = IPSEC_SPSTATE_DEAD; + TAILQ_REMOVE(&V_sptree[sp->spidx.dir], sp, chain); + LIST_REMOVE(sp, idhash); + V_sp_genid++; + SPTREE_WUNLOCK(); + key_freesp(&sp); } /* - * Must be called after calling key_allocsp(). - * For the packet with socket. + * insert a secpolicy into the SP database. Lower priorities first */ -void -key_freeso(struct socket *so) +static void +key_insertsp(struct secpolicy *newsp) { - IPSEC_ASSERT(so != NULL, ("null so")); - - switch (so->so_proto->pr_domain->dom_family) { -#if defined(INET) || defined(INET6) -#ifdef INET - case PF_INET: -#endif -#ifdef INET6 - case PF_INET6: -#endif - { - struct inpcb *pcb = sotoinpcb(so); + struct secpolicy *sp; - /* Does it have a PCB ? */ - if (pcb == NULL) - return; - key_freesp_so(&pcb->inp_sp->sp_in); - key_freesp_so(&pcb->inp_sp->sp_out); - } - break; -#endif /* INET || INET6 */ - default: - ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", - __func__, so->so_proto->pr_domain->dom_family)); - return; + SPTREE_WLOCK_ASSERT(); + TAILQ_FOREACH(sp, &V_sptree[newsp->spidx.dir], chain) { + if (newsp->priority < sp->priority) { + TAILQ_INSERT_BEFORE(sp, newsp, chain); + goto done; + } } + TAILQ_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, chain); +done: + LIST_INSERT_HEAD(SPHASH_HASH(newsp->id), newsp, idhash); + newsp->state = IPSEC_SPSTATE_ALIVE; + V_sp_genid++; } -static void -key_freesp_so(struct secpolicy **sp) +/* + * Insert a bunch of VTI secpolicies into the SPDB. + * We keep VTI policies in the separate list due to following reasons: + * 1) they should be immutable to user's or some deamon's attempts to + * delete. The only way delete such policies - destroy or unconfigure + * corresponding virtual inteface. + * 2) such policies have traffic selector that matches all traffic per + * address family. + * Since all VTI policies have the same priority, we don't care about + * policies order. + */ +int +key_register_ifnet(struct secpolicy **spp, u_int count) { - IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); + struct mbuf *m; + u_int i; - if ((*sp)->policy == IPSEC_POLICY_ENTRUST || - (*sp)->policy == IPSEC_POLICY_BYPASS) - return; + SPTREE_WLOCK(); + /* + * First of try to acquire id for each SP. + */ + for (i = 0; i < count; i++) { + IPSEC_ASSERT(spp[i]->spidx.dir == IPSEC_DIR_INBOUND || + spp[i]->spidx.dir == IPSEC_DIR_OUTBOUND, + ("invalid direction %u", spp[i]->spidx.dir)); - IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, - ("invalid policy %u", (*sp)->policy)); - KEY_FREESP(sp); + if ((spp[i]->id = key_getnewspid()) == 0) { + SPTREE_WUNLOCK(); + return (EAGAIN); + } + } + for (i = 0; i < count; i++) { + TAILQ_INSERT_TAIL(&V_sptree_ifnet[spp[i]->spidx.dir], + spp[i], chain); + /* + * NOTE: despite the fact that we keep VTI SP in the + * separate list, SPHASH contains policies from both + * sources. Thus SADB_X_SPDGET will correctly return + * SP by id, because it uses SPHASH for lookups. + */ + LIST_INSERT_HEAD(SPHASH_HASH(spp[i]->id), spp[i], idhash); + spp[i]->state = IPSEC_SPSTATE_IFNET; + } + SPTREE_WUNLOCK(); + /* + * Notify user processes about new SP. + */ + for (i = 0; i < count; i++) { + m = key_setdumpsp(spp[i], SADB_X_SPDADD, 0, 0); + if (m != NULL) + key_sendup_mbuf(NULL, m, KEY_SENDUP_ALL); + } + return (0); } void -key_addrefsa(struct secasvar *sav, const char* where, int tag) +key_unregister_ifnet(struct secpolicy **spp, u_int count) { + struct mbuf *m; + u_int i; - IPSEC_ASSERT(sav != NULL, ("null sav")); - IPSEC_ASSERT(sav->refcnt > 0, ("refcount must exist")); + SPTREE_WLOCK(); + for (i = 0; i < count; i++) { + IPSEC_ASSERT(spp[i]->spidx.dir == IPSEC_DIR_INBOUND || + spp[i]->spidx.dir == IPSEC_DIR_OUTBOUND, + ("invalid direction %u", spp[i]->spidx.dir)); + + if (spp[i]->state != IPSEC_SPSTATE_IFNET) + continue; + spp[i]->state = IPSEC_SPSTATE_DEAD; + TAILQ_REMOVE(&V_sptree_ifnet[spp[i]->spidx.dir], + spp[i], chain); + LIST_REMOVE(spp[i], idhash); + } + SPTREE_WUNLOCK(); - sa_addref(sav); + for (i = 0; i < count; i++) { + m = key_setdumpsp(spp[i], SADB_X_SPDDELETE, 0, 0); + if (m != NULL) + key_sendup_mbuf(NULL, m, KEY_SENDUP_ALL); + } } /* @@ -1245,58 +1223,57 @@ key_addrefsa(struct secasvar *sav, const char* where, int tag) * for a policy. */ void -key_freesav(struct secasvar **psav, const char* where, int tag) +key_freesav(struct secasvar **psav) { struct secasvar *sav = *psav; IPSEC_ASSERT(sav != NULL, ("null sav")); + if (SAV_DELREF(sav) == 0) + return; - if (sa_delref(sav)) { - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", - __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); - *psav = NULL; - key_delsav(sav); - } else { - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", - __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); - } + KEYDBG(IPSEC_STAMP, + printf("%s: last reference to SA(%p)\n", __func__, sav)); + + *psav = NULL; + key_delsav(sav); } -/* %%% SPD management */ /* - * free security policy entry. + * Unlink SA from SAH and SPI hash under SAHTREE_WLOCK. + * Expect that SA has extra reference due to lookup. + * Release this references, also release SAH reference after unlink. */ static void -key_delsp(struct secpolicy *sp) +key_unlinksav(struct secasvar *sav) { - struct ipsecrequest *isr, *nextisr; - - IPSEC_ASSERT(sp != NULL, ("null sp")); - SPTREE_LOCK_ASSERT(); - - sp->state = IPSEC_SPSTATE_DEAD; - - IPSEC_ASSERT(sp->refcnt == 0, - ("SP with references deleted (refcnt %u)", sp->refcnt)); - - /* remove from SP index */ - if (__LIST_CHAINED(sp)) - LIST_REMOVE(sp, chain); + struct secashead *sah; - for (isr = sp->req; isr != NULL; isr = nextisr) { - if (isr->sav != NULL) { - KEY_FREESAV(&isr->sav); - isr->sav = NULL; - } + KEYDBG(KEY_STAMP, + printf("%s: SA(%p)\n", __func__, sav)); - nextisr = isr->next; - ipsec_delisr(isr); + SAHTREE_UNLOCK_ASSERT(); + SAHTREE_WLOCK(); + if (sav->state == SADB_SASTATE_DEAD) { + /* SA is already unlinked */ + SAHTREE_WUNLOCK(); + return; } - _key_delsp(sp); + /* Unlink from SAH */ + if (sav->state == SADB_SASTATE_LARVAL) + TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain); + else + TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain); + /* Unlink from SPI hash */ + LIST_REMOVE(sav, spihash); + sav->state = SADB_SASTATE_DEAD; + sah = sav->sah; + SAHTREE_WUNLOCK(); + key_freesav(&sav); + /* Since we are unlinked, release reference to SAH */ + key_freesah(&sah); } +/* %%% SPD management */ /* * search SPD * OUT: NULL : not found @@ -1305,20 +1282,19 @@ key_delsp(struct secpolicy *sp) static struct secpolicy * key_getsp(struct secpolicyindex *spidx) { + SPTREE_RLOCK_TRACKER; struct secpolicy *sp; IPSEC_ASSERT(spidx != NULL, ("null spidx")); - SPTREE_LOCK(); - LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { - if (sp->state == IPSEC_SPSTATE_DEAD) - continue; + SPTREE_RLOCK(); + TAILQ_FOREACH(sp, &V_sptree[spidx->dir], chain) { if (key_cmpspidx_exactly(spidx, &sp->spidx)) { SP_ADDREF(sp); break; } } - SPTREE_UNLOCK(); + SPTREE_RUNLOCK(); return sp; } @@ -1326,73 +1302,58 @@ key_getsp(struct secpolicyindex *spidx) /* * get SP by index. * OUT: NULL : not found - * others : found, pointer to a SP. + * others : found, pointer to referenced SP. */ static struct secpolicy * -key_getspbyid(u_int32_t id) +key_getspbyid(uint32_t id) { + SPTREE_RLOCK_TRACKER; struct secpolicy *sp; - SPTREE_LOCK(); - LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { - if (sp->state == IPSEC_SPSTATE_DEAD) - continue; - if (sp->id == id) { - SP_ADDREF(sp); - goto done; - } - } - - LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { - if (sp->state == IPSEC_SPSTATE_DEAD) - continue; + SPTREE_RLOCK(); + LIST_FOREACH(sp, SPHASH_HASH(id), idhash) { if (sp->id == id) { SP_ADDREF(sp); - goto done; + break; } } -done: - SPTREE_UNLOCK(); - - return sp; + SPTREE_RUNLOCK(); + return (sp); } struct secpolicy * -key_newsp(const char* where, int tag) +key_newsp(void) { - struct secpolicy *newsp = NULL; + struct secpolicy *sp; - newsp = (struct secpolicy *) - malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); - if (newsp) { - SECPOLICY_LOCK_INIT(newsp); - newsp->refcnt = 1; - newsp->req = NULL; - } + sp = malloc(sizeof(*sp), M_IPSEC_SP, M_NOWAIT | M_ZERO); + if (sp != NULL) + SP_INITREF(sp); + return (sp); +} - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s from %s:%u return SP:%p\n", __func__, - where, tag, newsp)); - return newsp; +struct ipsecrequest * +ipsec_newisr(void) +{ + + return (malloc(sizeof(struct ipsecrequest), M_IPSEC_SR, + M_NOWAIT | M_ZERO)); } -static void -_key_delsp(struct secpolicy *sp) +void +ipsec_delisr(struct ipsecrequest *p) { - SECPOLICY_LOCK_DESTROY(sp); - free(sp, M_IPSEC_SP); + + free(p, M_IPSEC_SR); } /* * create secpolicy structure from sadb_x_policy structure. - * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, - * so must be set properly later. + * NOTE: `state', `secpolicyindex' and 'id' in secpolicy structure + * are not set, so must be set properly later. */ struct secpolicy * -key_msg2sp(xpl0, len, error) - struct sadb_x_policy *xpl0; - size_t len; - int *error; +key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error) { struct secpolicy *newsp; @@ -1405,13 +1366,15 @@ key_msg2sp(xpl0, len, error) return NULL; } - if ((newsp = KEY_NEWSP()) == NULL) { + if ((newsp = key_newsp()) == NULL) { *error = ENOBUFS; return NULL; } newsp->spidx.dir = xpl0->sadb_x_policy_dir; newsp->policy = xpl0->sadb_x_policy_type; + newsp->priority = xpl0->sadb_x_policy_priority; + newsp->tcount = 0; /* check policy */ switch (xpl0->sadb_x_policy_type) { @@ -1419,20 +1382,19 @@ key_msg2sp(xpl0, len, error) case IPSEC_POLICY_NONE: case IPSEC_POLICY_ENTRUST: case IPSEC_POLICY_BYPASS: - newsp->req = NULL; break; case IPSEC_POLICY_IPSEC: { - int tlen; struct sadb_x_ipsecrequest *xisr; - struct ipsecrequest **p_isr = &newsp->req; + struct ipsecrequest *isr; + int tlen; /* validity check */ if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } @@ -1445,22 +1407,33 @@ key_msg2sp(xpl0, len, error) if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " "length.\n", __func__)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } + if (newsp->tcount >= IPSEC_MAXREQ) { + ipseclog((LOG_DEBUG, + "%s: too many ipsecrequests.\n", + __func__)); + key_freesp(&newsp); + *error = EINVAL; + return (NULL); + } + /* allocate request buffer */ /* NB: data structure is zero'd */ - *p_isr = ipsec_newisr(); - if ((*p_isr) == NULL) { + isr = ipsec_newisr(); + if (isr == NULL) { ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = ENOBUFS; return NULL; } + newsp->req[newsp->tcount++] = isr; + /* set values */ switch (xisr->sadb_x_ipsecrequest_proto) { case IPPROTO_ESP: @@ -1471,11 +1444,12 @@ key_msg2sp(xpl0, len, error) ipseclog((LOG_DEBUG, "%s: invalid proto type=%u\n", __func__, xisr->sadb_x_ipsecrequest_proto)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EPROTONOSUPPORT; return NULL; } - (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; + isr->saidx.proto = + (uint8_t)xisr->sadb_x_ipsecrequest_proto; switch (xisr->sadb_x_ipsecrequest_mode) { case IPSEC_MODE_TRANSPORT: @@ -1486,11 +1460,11 @@ key_msg2sp(xpl0, len, error) ipseclog((LOG_DEBUG, "%s: invalid mode=%u\n", __func__, xisr->sadb_x_ipsecrequest_mode)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } - (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; + isr->saidx.mode = xisr->sadb_x_ipsecrequest_mode; switch (xisr->sadb_x_ipsecrequest_level) { case IPSEC_LEVEL_DEFAULT: @@ -1517,16 +1491,16 @@ key_msg2sp(xpl0, len, error) if (xisr->sadb_x_ipsecrequest_reqid == 0) { u_int32_t reqid; if ((reqid = key_newreqid()) == 0) { - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = ENOBUFS; return NULL; } - (*p_isr)->saidx.reqid = reqid; + isr->saidx.reqid = reqid; xisr->sadb_x_ipsecrequest_reqid = reqid; } else { /* set it for manual keying. */ - (*p_isr)->saidx.reqid = - xisr->sadb_x_ipsecrequest_reqid; + isr->saidx.reqid = + xisr->sadb_x_ipsecrequest_reqid; } break; @@ -1534,59 +1508,72 @@ key_msg2sp(xpl0, len, error) ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", __func__, xisr->sadb_x_ipsecrequest_level)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } - (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; + isr->level = xisr->sadb_x_ipsecrequest_level; /* set IP addresses if there */ if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { struct sockaddr *paddr; paddr = (struct sockaddr *)(xisr + 1); - /* validity check */ if (paddr->sa_len - > sizeof((*p_isr)->saidx.src)) { + > sizeof(isr->saidx.src)) { ipseclog((LOG_DEBUG, "%s: invalid " "request address length.\n", __func__)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } - bcopy(paddr, &(*p_isr)->saidx.src, - paddr->sa_len); - - paddr = (struct sockaddr *)((caddr_t)paddr - + paddr->sa_len); + bcopy(paddr, &isr->saidx.src, paddr->sa_len); + paddr = (struct sockaddr *)((caddr_t)paddr + + paddr->sa_len); /* validity check */ if (paddr->sa_len - > sizeof((*p_isr)->saidx.dst)) { + > sizeof(isr->saidx.dst)) { ipseclog((LOG_DEBUG, "%s: invalid " "request address length.\n", __func__)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } - bcopy(paddr, &(*p_isr)->saidx.dst, - paddr->sa_len); + /* AF family should match */ + if (paddr->sa_family != + isr->saidx.src.sa.sa_family) { + ipseclog((LOG_DEBUG, "%s: address " + "family doesn't match.\n", + __func__)); + key_freesp(&newsp); + *error = EINVAL; + return (NULL); + } + bcopy(paddr, &isr->saidx.dst, paddr->sa_len); + } else { + /* + * Addresses for TUNNEL mode requests are + * mandatory. + */ + if (isr->saidx.mode == IPSEC_MODE_TUNNEL) { + ipseclog((LOG_DEBUG, "%s: missing " + "request addresses.\n", __func__)); + key_freesp(&newsp); + *error = EINVAL; + return (NULL); + } } - - (*p_isr)->sp = newsp; - - /* initialization for the next. */ - p_isr = &(*p_isr)->next; tlen -= xisr->sadb_x_ipsecrequest_len; /* validity check */ if (tlen < 0) { ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", __func__)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } @@ -1594,76 +1581,114 @@ key_msg2sp(xpl0, len, error) xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr + xisr->sadb_x_ipsecrequest_len); } + /* XXXAE: LARVAL SP */ + if (newsp->tcount < 1) { + ipseclog((LOG_DEBUG, "%s: valid IPSEC transforms " + "not found.\n", __func__)); + key_freesp(&newsp); + *error = EINVAL; + return (NULL); + } } break; default: ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); - KEY_FREESP(&newsp); + key_freesp(&newsp); *error = EINVAL; return NULL; } *error = 0; - return newsp; + return (newsp); } -static u_int32_t -key_newreqid() +uint32_t +key_newreqid(void) { - static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; + static uint32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; - auto_reqid = (auto_reqid == ~0 - ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); + if (auto_reqid == ~0) + auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; + else + auto_reqid++; /* XXX should be unique check */ - - return auto_reqid; + return (auto_reqid); } /* * copy secpolicy struct to sadb_x_policy structure indicated. */ -struct mbuf * -key_sp2msg(sp) - struct secpolicy *sp; +static struct mbuf * +key_sp2mbuf(struct secpolicy *sp) { - struct sadb_x_policy *xpl; - int tlen; - caddr_t p; struct mbuf *m; - - IPSEC_ASSERT(sp != NULL, ("null policy")); + size_t tlen; tlen = key_getspreqmsglen(sp); - - m = key_alloc_mbuf(tlen); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); - return NULL; + m = m_get2(tlen, M_NOWAIT, MT_DATA, 0); + if (m == NULL) + return (NULL); + m_align(m, tlen); + m->m_len = tlen; + if (key_sp2msg(sp, m->m_data, &tlen) != 0) { + m_freem(m); + return (NULL); } + return (m); +} - m->m_len = tlen; - m->m_next = NULL; - xpl = mtod(m, struct sadb_x_policy *); - bzero(xpl, tlen); +int +key_sp2msg(struct secpolicy *sp, void *request, size_t *len) +{ + struct sadb_x_ipsecrequest *xisr; + struct sadb_x_policy *xpl; + struct ipsecrequest *isr; + size_t xlen, ilen; + caddr_t p; + int error, i; + + IPSEC_ASSERT(sp != NULL, ("null policy")); + + xlen = sizeof(*xpl); + if (*len < xlen) + return (EINVAL); - xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); + error = 0; + bzero(request, *len); + xpl = (struct sadb_x_policy *)request; xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; xpl->sadb_x_policy_type = sp->policy; xpl->sadb_x_policy_dir = sp->spidx.dir; xpl->sadb_x_policy_id = sp->id; - p = (caddr_t)xpl + sizeof(*xpl); + xpl->sadb_x_policy_priority = sp->priority; + switch (sp->state) { + case IPSEC_SPSTATE_IFNET: + xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_IFNET; + break; + case IPSEC_SPSTATE_PCB: + xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_PCB; + break; + default: + xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_GLOBAL; + } /* if is the policy for ipsec ? */ if (sp->policy == IPSEC_POLICY_IPSEC) { - struct sadb_x_ipsecrequest *xisr; - struct ipsecrequest *isr; - - for (isr = sp->req; isr != NULL; isr = isr->next) { - + p = (caddr_t)xpl + sizeof(*xpl); + for (i = 0; i < sp->tcount; i++) { + isr = sp->req[i]; + ilen = PFKEY_ALIGN8(sizeof(*xisr) + + isr->saidx.src.sa.sa_len + + isr->saidx.dst.sa.sa_len); + xlen += ilen; + if (xlen > *len) { + error = ENOBUFS; + /* Calculate needed size */ + continue; + } xisr = (struct sadb_x_ipsecrequest *)p; - + xisr->sadb_x_ipsecrequest_len = ilen; xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; xisr->sadb_x_ipsecrequest_level = isr->level; @@ -1673,31 +1698,21 @@ key_sp2msg(sp) bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); p += isr->saidx.src.sa.sa_len; bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); - p += isr->saidx.src.sa.sa_len; - - xisr->sadb_x_ipsecrequest_len = - PFKEY_ALIGN8(sizeof(*xisr) - + isr->saidx.src.sa.sa_len - + isr->saidx.dst.sa.sa_len); + p += isr->saidx.dst.sa.sa_len; } } - - return m; + xpl->sadb_x_policy_len = PFKEY_UNIT64(xlen); + if (error == 0) + *len = xlen; + else + *len = sizeof(*xpl); + return (error); } /* m will not be freed nor modified */ static struct mbuf * -#ifdef __STDC__ key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, - int ndeep, int nitem, ...) -#else -key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) - struct mbuf *m; - const struct sadb_msghdr *mhp; - int ndeep; - int nitem; - va_dcl -#endif + int ndeep, int nitem, ...) { va_list ap; int idx; @@ -1725,7 +1740,7 @@ key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); - MGETHDR(n, M_DONTWAIT, MT_DATA); + MGETHDR(n, M_NOWAIT, MT_DATA); if (!n) goto fail; n->m_len = len; @@ -1734,17 +1749,16 @@ key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) mtod(n, caddr_t)); } else if (i < ndeep) { len = mhp->extlen[idx]; - n = key_alloc_mbuf(len); - if (!n || n->m_next) { /*XXX*/ - if (n) - m_freem(n); + n = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (n == NULL) goto fail; - } + m_align(n, len); + n->m_len = len; m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], mtod(n, caddr_t)); } else { n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], - M_DONTWAIT); + M_NOWAIT); } if (n == NULL) goto fail; @@ -1784,18 +1798,16 @@ fail: * SPDSETIDX like SPDADD without a part of policy requests. * SPDUPDATE replace a unique policy entry. * + * XXXAE: serialize this in PF_KEY to avoid races. * m will always be freed. */ static int -key_spdadd(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { + struct secpolicyindex spidx; struct sadb_address *src0, *dst0; struct sadb_x_policy *xpl0, *xpl; struct sadb_lifetime *lft = NULL; - struct secpolicyindex spidx; struct secpolicy *newsp; int error; @@ -1804,24 +1816,26 @@ key_spdadd(so, m, mhp) IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); - if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || - mhp->ext[SADB_X_EXT_POLICY] == NULL) { - ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); + if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) || + SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || - mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) || + SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { - if (mhp->extlen[SADB_EXT_LIFETIME_HARD] - < sizeof(struct sadb_lifetime)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (!SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD)) { + if (SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_HARD)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); return key_senderror(so, m, EINVAL); } lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; @@ -1831,141 +1845,93 @@ key_spdadd(so, m, mhp) dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; - /* - * Note: do not parse SADB_X_EXT_NAT_T_* here: - * we are processing traffic endpoints. - */ - - /* make secindex */ - /* XXX boundary check against sa_len */ - KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, - src0 + 1, - dst0 + 1, - src0->sadb_address_prefixlen, - dst0->sadb_address_prefixlen, - src0->sadb_address_proto, - &spidx); - - /* checking the direciton. */ + /* check the direciton */ switch (xpl0->sadb_x_policy_dir) { case IPSEC_DIR_INBOUND: case IPSEC_DIR_OUTBOUND: break; default: - ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); - mhp->msg->sadb_msg_errno = EINVAL; - return 0; + ipseclog((LOG_DEBUG, "%s: invalid SP direction.\n", __func__)); + return key_senderror(so, m, EINVAL); } - - /* check policy */ /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ - if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST - || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { - ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); + if (xpl0->sadb_x_policy_type != IPSEC_POLICY_DISCARD && + xpl0->sadb_x_policy_type != IPSEC_POLICY_NONE && + xpl0->sadb_x_policy_type != IPSEC_POLICY_IPSEC) { + ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); return key_senderror(so, m, EINVAL); } /* policy requests are mandatory when action is ipsec. */ - if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX - && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC - && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { - ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", - __func__)); + if (xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && + mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { + ipseclog((LOG_DEBUG, + "%s: policy requests required.\n", __func__)); return key_senderror(so, m, EINVAL); } - /* - * checking there is SP already or not. - * SPDUPDATE doesn't depend on whether there is a SP or not. - * If the type is either SPDADD or SPDSETIDX AND a SP is found, - * then error. - */ - newsp = key_getsp(&spidx); - if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { - if (newsp) { - SPTREE_LOCK(); - newsp->state = IPSEC_SPSTATE_DEAD; - SPTREE_UNLOCK(); - KEY_FREESP(&newsp); - } - } else { - if (newsp != NULL) { - KEY_FREESP(&newsp); - ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", - __func__)); - return key_senderror(so, m, EEXIST); - } - } - - /* allocation new SP entry */ - if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { + error = key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)); + if (error != 0 || + src0->sadb_address_proto != dst0->sadb_address_proto) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); return key_senderror(so, m, error); } - - if ((newsp->id = key_getnewspid()) == 0) { - _key_delsp(newsp); - return key_senderror(so, m, ENOBUFS); - } - - /* XXX boundary check against sa_len */ + /* make secindex */ KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, src0 + 1, dst0 + 1, src0->sadb_address_prefixlen, dst0->sadb_address_prefixlen, src0->sadb_address_proto, - &newsp->spidx); - - /* sanity check on addr pair */ - if (((struct sockaddr *)(src0 + 1))->sa_family != - ((struct sockaddr *)(dst0+ 1))->sa_family) { - _key_delsp(newsp); - return key_senderror(so, m, EINVAL); - } - if (((struct sockaddr *)(src0 + 1))->sa_len != - ((struct sockaddr *)(dst0+ 1))->sa_len) { - _key_delsp(newsp); - return key_senderror(so, m, EINVAL); - } -#if 1 - if (newsp->req && newsp->req->saidx.src.sa.sa_family && newsp->req->saidx.dst.sa.sa_family) { - if (newsp->req->saidx.src.sa.sa_family != newsp->req->saidx.dst.sa.sa_family) { - _key_delsp(newsp); - return key_senderror(so, m, EINVAL); + &spidx); + /* Checking there is SP already or not. */ + newsp = key_getsp(&spidx); + if (newsp != NULL) { + if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { + KEYDBG(KEY_STAMP, + printf("%s: unlink SP(%p) for SPDUPDATE\n", + __func__, newsp)); + KEYDBG(KEY_DATA, kdebug_secpolicy(newsp)); + key_unlink(newsp); + key_freesp(&newsp); + } else { + key_freesp(&newsp); + ipseclog((LOG_DEBUG, "%s: a SP entry exists already.", + __func__)); + return (key_senderror(so, m, EEXIST)); } } -#endif - newsp->created = time_second; - newsp->lastused = newsp->created; + /* allocate new SP entry */ + if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { + return key_senderror(so, m, error); + } + + newsp->lastused = newsp->created = time_second; newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; + bcopy(&spidx, &newsp->spidx, sizeof(spidx)); - newsp->refcnt = 1; /* do not reclaim until I say I do */ - newsp->state = IPSEC_SPSTATE_ALIVE; - LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); - - /* delete the entry in spacqtree */ - if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { - struct secspacq *spacq = key_getspacq(&spidx); - if (spacq != NULL) { - /* reset counter in order to deletion by timehandler. */ - spacq->created = time_second; - spacq->count = 0; - SPACQ_UNLOCK(); - } - } + /* XXXAE: there is race between key_getsp() and key_insertsp() */ + SPTREE_WLOCK(); + if ((newsp->id = key_getnewspid()) == 0) { + SPTREE_WUNLOCK(); + key_freesp(&newsp); + return key_senderror(so, m, ENOBUFS); + } + key_insertsp(newsp); + SPTREE_WUNLOCK(); + + KEYDBG(KEY_STAMP, + printf("%s: SP(%p)\n", __func__, newsp)); + KEYDBG(KEY_DATA, kdebug_secpolicy(newsp)); { struct mbuf *n, *mpolicy; struct sadb_msg *newmsg; int off; - /* - * Note: do not send SADB_X_EXT_NAT_T_* here: - * we are sending traffic endpoints. - */ - /* create new sadb_msg to reply. */ if (lft) { n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, @@ -2013,30 +1979,32 @@ key_spdadd(so, m, mhp) * 0: failure. * others: success. */ -static u_int32_t -key_getnewspid() +static uint32_t +key_getnewspid(void) { - u_int32_t newid = 0; - int count = V_key_spi_trycnt; /* XXX */ struct secpolicy *sp; + uint32_t newid = 0; + int count = V_key_spi_trycnt; /* XXX */ - /* when requesting to allocate spi ranged */ + SPTREE_WLOCK_ASSERT(); while (count--) { - newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); - - if ((sp = key_getspbyid(newid)) == NULL) + if (V_policy_id == ~0) /* overflowed */ + newid = V_policy_id = 1; + else + newid = ++V_policy_id; + LIST_FOREACH(sp, SPHASH_HASH(newid), idhash) { + if (sp->id == newid) + break; + } + if (sp == NULL) break; - - KEY_FREESP(&sp); } - if (count == 0 || newid == 0) { - ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", - __func__)); - return 0; + ipseclog((LOG_DEBUG, "%s: failed to allocate policy id.\n", + __func__)); + return (0); } - - return newid; + return (newid); } /* @@ -2052,14 +2020,12 @@ key_getnewspid() * m will always be freed. */ static int -key_spddelete(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_spddelete(struct socket *so, struct mbuf *m, + const struct sadb_msghdr *mhp) { + struct secpolicyindex spidx; struct sadb_address *src0, *dst0; struct sadb_x_policy *xpl0; - struct secpolicyindex spidx; struct secpolicy *sp; IPSEC_ASSERT(so != NULL, ("null so")); @@ -2067,18 +2033,19 @@ key_spddelete(so, m, mhp) IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); - if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || - mhp->ext[SADB_X_EXT_POLICY] == NULL) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) || + SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || - mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) || + SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); return key_senderror(so, m, EINVAL); } @@ -2086,13 +2053,29 @@ key_spddelete(so, m, mhp) dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; - /* - * Note: do not parse SADB_X_EXT_NAT_T_* here: - * we are processing traffic endpoints. - */ - + /* check the direciton */ + switch (xpl0->sadb_x_policy_dir) { + case IPSEC_DIR_INBOUND: + case IPSEC_DIR_OUTBOUND: + break; + default: + ipseclog((LOG_DEBUG, "%s: invalid SP direction.\n", __func__)); + return key_senderror(so, m, EINVAL); + } + /* Only DISCARD, NONE and IPSEC are allowed */ + if (xpl0->sadb_x_policy_type != IPSEC_POLICY_DISCARD && + xpl0->sadb_x_policy_type != IPSEC_POLICY_NONE && + xpl0->sadb_x_policy_type != IPSEC_POLICY_IPSEC) { + ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); + return key_senderror(so, m, EINVAL); + } + if (key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)) != 0 || + src0->sadb_address_proto != dst0->sadb_address_proto) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); + return key_senderror(so, m, EINVAL); + } /* make secindex */ - /* XXX boundary check against sa_len */ KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, src0 + 1, dst0 + 1, @@ -2101,16 +2084,6 @@ key_spddelete(so, m, mhp) src0->sadb_address_proto, &spidx); - /* checking the direciton. */ - switch (xpl0->sadb_x_policy_dir) { - case IPSEC_DIR_INBOUND: - case IPSEC_DIR_OUTBOUND: - break; - default: - ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); - return key_senderror(so, m, EINVAL); - } - /* Is there SP in SPD ? */ if ((sp = key_getsp(&spidx)) == NULL) { ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); @@ -2120,20 +2093,16 @@ key_spddelete(so, m, mhp) /* save policy id to buffer to be returned. */ xpl0->sadb_x_policy_id = sp->id; - SPTREE_LOCK(); - sp->state = IPSEC_SPSTATE_DEAD; - SPTREE_UNLOCK(); - KEY_FREESP(&sp); + KEYDBG(KEY_STAMP, + printf("%s: SP(%p)\n", __func__, sp)); + KEYDBG(KEY_DATA, kdebug_secpolicy(sp)); + key_unlink(sp); + key_freesp(&sp); { struct mbuf *n; struct sadb_msg *newmsg; - /* - * Note: do not send SADB_X_EXT_NAT_T_* here: - * we are sending traffic endpoints. - */ - /* create new sadb_msg to reply. */ n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); @@ -2162,37 +2131,45 @@ key_spddelete(so, m, mhp) * m will always be freed. */ static int -key_spddelete2(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_spddelete2(struct socket *so, struct mbuf *m, + const struct sadb_msghdr *mhp) { - u_int32_t id; struct secpolicy *sp; + uint32_t id; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); - if (mhp->ext[SADB_X_EXT_POLICY] == NULL || - mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); + if (SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY) || + SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) { + ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", + __func__)); return key_senderror(so, m, EINVAL); } - id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; + id = ((struct sadb_x_policy *) + mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; /* Is there SP in SPD ? */ if ((sp = key_getspbyid(id)) == NULL) { - ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); + ipseclog((LOG_DEBUG, "%s: no SP found for id %u.\n", + __func__, id)); return key_senderror(so, m, EINVAL); } - SPTREE_LOCK(); - sp->state = IPSEC_SPSTATE_DEAD; - SPTREE_UNLOCK(); - KEY_FREESP(&sp); + KEYDBG(KEY_STAMP, + printf("%s: SP(%p)\n", __func__, sp)); + KEYDBG(KEY_DATA, kdebug_secpolicy(sp)); + key_unlink(sp); + if (sp->state != IPSEC_SPSTATE_DEAD) { + ipseclog((LOG_DEBUG, "%s: failed to delete SP with id %u.\n", + __func__, id)); + key_freesp(&sp); + return (key_senderror(so, m, EACCES)); + } + key_freesp(&sp); { struct mbuf *n, *nn; @@ -2202,10 +2179,9 @@ key_spddelete2(so, m, mhp) /* create new sadb_msg to reply. */ len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); - MGETHDR(n, M_DONTWAIT, MT_DATA); + MGETHDR(n, M_NOWAIT, MT_DATA); if (n && len > MHLEN) { - MCLGET(n, M_DONTWAIT); - if ((n->m_flags & M_EXT) == 0) { + if (!(MCLGET(n, M_NOWAIT))) { m_freem(n); n = NULL; } @@ -2224,7 +2200,7 @@ key_spddelete2(so, m, mhp) off, len)); n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], - mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); + mhp->extlen[SADB_X_EXT_POLICY], M_NOWAIT); if (!n->m_next) { m_freem(n); return key_senderror(so, m, ENOBUFS); @@ -2244,7 +2220,7 @@ key_spddelete2(so, m, mhp) } /* - * SADB_X_GET processing + * SADB_X_SPDGET processing * receive * <base, policy(*)> * from the user(?), @@ -2256,37 +2232,37 @@ key_spddelete2(so, m, mhp) * m will always be freed. */ static int -key_spdget(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_spdget(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - u_int32_t id; struct secpolicy *sp; struct mbuf *n; + uint32_t id; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); - if (mhp->ext[SADB_X_EXT_POLICY] == NULL || - mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { + if (SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY) || + SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) { ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + __func__)); return key_senderror(so, m, EINVAL); } - id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; + id = ((struct sadb_x_policy *) + mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; /* Is there SP in SPD ? */ if ((sp = key_getspbyid(id)) == NULL) { - ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); + ipseclog((LOG_DEBUG, "%s: no SP found for id %u.\n", + __func__, id)); return key_senderror(so, m, ENOENT); } - n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); - KEY_FREESP(&sp); + n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, + mhp->msg->sadb_msg_pid); + key_freesp(&sp); if (n != NULL) { m_freem(m); return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); @@ -2300,7 +2276,7 @@ key_spdget(so, m, mhp) * send * <base, policy(*)> * to KMD, and expect to receive - * <base> with SADB_X_SPDACQUIRE if error occured, + * <base> with SADB_X_SPDACQUIRE if error occurred, * or * <base, policy> * with SADB_X_SPDUPDATE from KMD by PF_KEY. @@ -2310,8 +2286,7 @@ key_spdget(so, m, mhp) * others: error number */ int -key_spdacquire(sp) - struct secpolicy *sp; +key_spdacquire(struct secpolicy *sp) { struct mbuf *result = NULL, *m; struct secspacq *newspacq; @@ -2330,7 +2305,8 @@ key_spdacquire(sp) } else { /* increment counter and do nothing. */ newspacq->count++; - return 0; + SPACQ_UNLOCK(); + return (0); } SPACQ_UNLOCK(); } else { @@ -2370,13 +2346,11 @@ key_spdacquire(sp) * m will always be freed. */ static int -key_spdflush(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_spdflush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { + struct secpolicy_queue drainq; struct sadb_msg *newmsg; - struct secpolicy *sp; + struct secpolicy *sp, *nextsp; u_int dir; IPSEC_ASSERT(so != NULL, ("null socket")); @@ -2387,11 +2361,27 @@ key_spdflush(so, m, mhp) if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) return key_senderror(so, m, EINVAL); + TAILQ_INIT(&drainq); + SPTREE_WLOCK(); for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { - SPTREE_LOCK(); - LIST_FOREACH(sp, &V_sptree[dir], chain) - sp->state = IPSEC_SPSTATE_DEAD; - SPTREE_UNLOCK(); + TAILQ_CONCAT(&drainq, &V_sptree[dir], chain); + } + /* + * We need to set state to DEAD for each policy to be sure, + * that another thread won't try to unlink it. + * Also remove SP from sphash. + */ + TAILQ_FOREACH(sp, &drainq, chain) { + sp->state = IPSEC_SPSTATE_DEAD; + LIST_REMOVE(sp, idhash); + } + V_sp_genid++; + SPTREE_WUNLOCK(); + sp = TAILQ_FIRST(&drainq); + while (sp != NULL) { + nextsp = TAILQ_NEXT(sp, chain); + key_freesp(&sp); + sp = nextsp; } if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { @@ -2410,27 +2400,34 @@ key_spdflush(so, m, mhp) return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); } +static uint8_t +key_satype2scopemask(uint8_t satype) +{ + + if (satype == IPSEC_POLICYSCOPE_ANY) + return (0xff); + return (satype); +} /* * SADB_SPDDUMP processing * receive * <base> - * from the user, and dump all SP leaves - * and send, + * from the user, and dump all SP leaves and send, * <base> ..... * to the ikmpd. * - * m will always be freed. + * NOTE: + * sadb_msg_satype is considered as mask of policy scopes. + * m will always be freed. */ static int -key_spddump(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_spddump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { + SPTREE_RLOCK_TRACKER; struct secpolicy *sp; - int cnt; - u_int dir; struct mbuf *n; + int cnt; + u_int dir, scope; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); @@ -2439,36 +2436,55 @@ key_spddump(so, m, mhp) /* search SPD entry and get buffer size. */ cnt = 0; - SPTREE_LOCK(); + scope = key_satype2scopemask(mhp->msg->sadb_msg_satype); + SPTREE_RLOCK(); for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { - LIST_FOREACH(sp, &V_sptree[dir], chain) { - cnt++; + if (scope & IPSEC_POLICYSCOPE_GLOBAL) { + TAILQ_FOREACH(sp, &V_sptree[dir], chain) + cnt++; + } + if (scope & IPSEC_POLICYSCOPE_IFNET) { + TAILQ_FOREACH(sp, &V_sptree_ifnet[dir], chain) + cnt++; } } if (cnt == 0) { - SPTREE_UNLOCK(); + SPTREE_RUNLOCK(); return key_senderror(so, m, ENOENT); } for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { - LIST_FOREACH(sp, &V_sptree[dir], chain) { - --cnt; - n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, - mhp->msg->sadb_msg_pid); + if (scope & IPSEC_POLICYSCOPE_GLOBAL) { + TAILQ_FOREACH(sp, &V_sptree[dir], chain) { + --cnt; + n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, + mhp->msg->sadb_msg_pid); + + if (n != NULL) + key_sendup_mbuf(so, n, KEY_SENDUP_ONE); + } + } + if (scope & IPSEC_POLICYSCOPE_IFNET) { + TAILQ_FOREACH(sp, &V_sptree_ifnet[dir], chain) { + --cnt; + n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, + mhp->msg->sadb_msg_pid); - if (n) - key_sendup_mbuf(so, n, KEY_SENDUP_ONE); + if (n != NULL) + key_sendup_mbuf(so, n, KEY_SENDUP_ONE); + } } } - SPTREE_UNLOCK(); + SPTREE_RUNLOCK(); m_freem(m); - return 0; + return (0); } static struct mbuf * -key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) +key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, + u_int32_t pid) { struct mbuf *result = NULL, *m; struct seclifetime lt; @@ -2478,10 +2494,6 @@ key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) goto fail; result = m; - /* - * Note: do not send SADB_X_EXT_NAT_T_* here: - * we are sending traffic endpoints. - */ m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); @@ -2496,7 +2508,7 @@ key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) goto fail; m_cat(result, m); - m = key_sp2msg(sp); + m = key_sp2mbuf(sp); if (!m) goto fail; m_cat(result, m); @@ -2539,37 +2551,29 @@ fail: m_freem(result); return NULL; } - /* * get PFKEY message length for security policy and request. */ -static u_int -key_getspreqmsglen(sp) - struct secpolicy *sp; +static size_t +key_getspreqmsglen(struct secpolicy *sp) { - u_int tlen; + size_t tlen, len; + int i; tlen = sizeof(struct sadb_x_policy); - /* if is the policy for ipsec ? */ if (sp->policy != IPSEC_POLICY_IPSEC) - return tlen; + return (tlen); /* get length of ipsec requests */ - { - struct ipsecrequest *isr; - int len; - - for (isr = sp->req; isr != NULL; isr = isr->next) { + for (i = 0; i < sp->tcount; i++) { len = sizeof(struct sadb_x_ipsecrequest) - + isr->saidx.src.sa.sa_len - + isr->saidx.dst.sa.sa_len; + + sp->req[i]->saidx.src.sa.sa_len + + sp->req[i]->saidx.dst.sa.sa_len; tlen += PFKEY_ALIGN8(len); } - } - - return tlen; + return (tlen); } /* @@ -2582,18 +2586,18 @@ key_getspreqmsglen(sp) * others : error number */ static int -key_spdexpire(sp) - struct secpolicy *sp; +key_spdexpire(struct secpolicy *sp) { - struct mbuf *result = NULL, *m; - int len; - int error = -1; struct sadb_lifetime *lt; - - /* XXX: Why do we lock ? */ + struct mbuf *result = NULL, *m; + int len, error = -1; IPSEC_ASSERT(sp != NULL, ("null secpolicy")); + KEYDBG(KEY_STAMP, + printf("%s: SP(%p)\n", __func__, sp)); + KEYDBG(KEY_DATA, kdebug_secpolicy(sp)); + /* set msg header */ m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); if (!m) { @@ -2604,13 +2608,13 @@ key_spdexpire(sp) /* create lifetime extension (current and hard) */ len = PFKEY_ALIGN8(sizeof(*lt)) * 2; - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) { error = ENOBUFS; goto fail; } + m_align(m, len); + m->m_len = len; bzero(mtod(m, caddr_t), len); lt = mtod(m, struct sadb_lifetime *); lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); @@ -2628,11 +2632,6 @@ key_spdexpire(sp) lt->sadb_lifetime_usetime = sp->validtime; m_cat(result, m); - /* - * Note: do not send SADB_X_EXT_NAT_T_* here: - * we are sending traffic endpoints. - */ - /* set sadb_address for source */ m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, @@ -2654,7 +2653,7 @@ key_spdexpire(sp) m_cat(result, m); /* set secpolicy */ - m = key_sp2msg(sp); + m = key_sp2mbuf(sp); if (!m) { error = ENOBUFS; goto fail; @@ -2691,185 +2690,220 @@ key_spdexpire(sp) /* %%% SAD management */ /* - * allocating a memory for new SA head, and copy from the values of mhp. + * allocating and initialize new SA head. * OUT: NULL : failure due to the lack of memory. * others : pointer to new SA head. */ static struct secashead * -key_newsah(saidx) - struct secasindex *saidx; +key_newsah(struct secasindex *saidx) { - struct secashead *newsah; + struct secashead *sah; - IPSEC_ASSERT(saidx != NULL, ("null saidx")); + sah = malloc(sizeof(struct secashead), M_IPSEC_SAH, + M_NOWAIT | M_ZERO); + if (sah == NULL) { + PFKEYSTAT_INC(in_nomem); + return (NULL); + } + TAILQ_INIT(&sah->savtree_larval); + TAILQ_INIT(&sah->savtree_alive); + sah->saidx = *saidx; + sah->state = SADB_SASTATE_DEAD; + SAH_INITREF(sah); - newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); - if (newsah != NULL) { - int i; - for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) - LIST_INIT(&newsah->savtree[i]); - newsah->saidx = *saidx; + KEYDBG(KEY_STAMP, + printf("%s: SAH(%p)\n", __func__, sah)); + KEYDBG(KEY_DATA, kdebug_secash(sah, NULL)); + return (sah); +} - /* add to saidxtree */ - newsah->state = SADB_SASTATE_MATURE; +static void +key_freesah(struct secashead **psah) +{ + struct secashead *sah = *psah; - SAHTREE_LOCK(); - LIST_INSERT_HEAD(&V_sahtree, newsah, chain); - SAHTREE_UNLOCK(); - } - return(newsah); + if (SAH_DELREF(sah) == 0) + return; + + KEYDBG(KEY_STAMP, + printf("%s: last reference to SAH(%p)\n", __func__, sah)); + KEYDBG(KEY_DATA, kdebug_secash(sah, NULL)); + + *psah = NULL; + key_delsah(sah); } -/* - * delete SA index and all SA registerd. - */ static void -key_delsah(sah) - struct secashead *sah; +key_delsah(struct secashead *sah) { - struct secasvar *sav, *nextsav; - u_int stateidx; - int zombie = 0; - IPSEC_ASSERT(sah != NULL, ("NULL sah")); - SAHTREE_LOCK_ASSERT(); - - /* searching all SA registerd in the secindex. */ - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_any); - stateidx++) { - u_int state = saorder_state_any[stateidx]; - LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { - if (sav->refcnt == 0) { - /* sanity check */ - KEY_CHKSASTATE(state, sav->state, __func__); - /* - * do NOT call KEY_FREESAV here: - * it will only delete the sav if refcnt == 1, - * where we already know that refcnt == 0 - */ - key_delsav(sav); - } else { - /* give up to delete this sa */ - zombie++; - } - } - } - if (!zombie) { /* delete only if there are savs */ - /* remove from tree of SA index */ - if (__LIST_CHAINED(sah)) - LIST_REMOVE(sah, chain); - if (sah->route_cache.sa_route.ro_rt) { - RTFREE(sah->route_cache.sa_route.ro_rt); - sah->route_cache.sa_route.ro_rt = (struct rtentry *)NULL; - } - free(sah, M_IPSEC_SAH); - } + IPSEC_ASSERT(sah->state == SADB_SASTATE_DEAD, + ("Attempt to free non DEAD SAH %p", sah)); + IPSEC_ASSERT(TAILQ_EMPTY(&sah->savtree_larval), + ("Attempt to free SAH %p with LARVAL SA", sah)); + IPSEC_ASSERT(TAILQ_EMPTY(&sah->savtree_alive), + ("Attempt to free SAH %p with ALIVE SA", sah)); + + free(sah, M_IPSEC_SAH); } /* - * allocating a new SA with LARVAL state. key_add() and key_getspi() call, + * allocating a new SA for key_add() and key_getspi() call, * and copy the values of mhp into new buffer. - * When SAD message type is GETSPI: - * to set sequence number from acq_seq++, - * to set zero to SPI. - * not to call key_setsava(). + * When SAD message type is SADB_GETSPI set SA state to LARVAL. + * For SADB_ADD create and initialize SA with MATURE state. * OUT: NULL : fail * others : pointer to new secasvar. - * - * does not modify mbuf. does not free mbuf on error. */ static struct secasvar * -key_newsav(m, mhp, sah, errp, where, tag) - struct mbuf *m; - const struct sadb_msghdr *mhp; - struct secashead *sah; - int *errp; - const char* where; - int tag; +key_newsav(const struct sadb_msghdr *mhp, struct secasindex *saidx, + uint32_t spi, int *errp) { - struct secasvar *newsav; - const struct sadb_sa *xsa; + struct secashead *sah; + struct secasvar *sav; + int isnew; - IPSEC_ASSERT(m != NULL, ("null mbuf")); IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); - IPSEC_ASSERT(sah != NULL, ("null secashead")); - - newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); - if (newsav == NULL) { - ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); - *errp = ENOBUFS; - goto done; - } - - switch (mhp->msg->sadb_msg_type) { - case SADB_GETSPI: - newsav->spi = 0; - -#ifdef IPSEC_DOSEQCHECK - /* sync sequence number */ - if (mhp->msg->sadb_msg_seq == 0) - newsav->seq = - (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); - else -#endif - newsav->seq = mhp->msg->sadb_msg_seq; - break; + IPSEC_ASSERT(mhp->msg->sadb_msg_type == SADB_GETSPI || + mhp->msg->sadb_msg_type == SADB_ADD, ("wrong message type")); - case SADB_ADD: - /* sanity check */ - if (mhp->ext[SADB_EXT_SA] == NULL) { - free(newsav, M_IPSEC_SA); - newsav = NULL; - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + sav = NULL; + sah = NULL; + /* check SPI value */ + switch (saidx->proto) { + case IPPROTO_ESP: + case IPPROTO_AH: + /* + * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values + * 1-255 reserved by IANA for future use, + * 0 for implementation specific, local use. + */ + if (ntohl(spi) <= 255) { + ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", + __func__, ntohl(spi))); *errp = EINVAL; goto done; } - xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; - newsav->spi = xsa->sadb_sa_spi; - newsav->seq = mhp->msg->sadb_msg_seq; break; - default: - free(newsav, M_IPSEC_SA); - newsav = NULL; - *errp = EINVAL; - goto done; } + sav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT | M_ZERO); + if (sav == NULL) { + *errp = ENOBUFS; + goto done; + } + sav->lock = malloc(sizeof(struct mtx), M_IPSEC_MISC, + M_NOWAIT | M_ZERO); + if (sav->lock == NULL) { + *errp = ENOBUFS; + goto done; + } + mtx_init(sav->lock, "ipsec association", NULL, MTX_DEF); + sav->lft_c = uma_zalloc(V_key_lft_zone, M_NOWAIT); + if (sav->lft_c == NULL) { + *errp = ENOBUFS; + goto done; + } + counter_u64_zero(sav->lft_c_allocations); + counter_u64_zero(sav->lft_c_bytes); - /* copy sav values */ - if (mhp->msg->sadb_msg_type != SADB_GETSPI) { - *errp = key_setsaval(newsav, m, mhp); - if (*errp) { - free(newsav, M_IPSEC_SA); - newsav = NULL; + sav->spi = spi; + sav->seq = mhp->msg->sadb_msg_seq; + sav->state = SADB_SASTATE_LARVAL; + sav->pid = (pid_t)mhp->msg->sadb_msg_pid; + SAV_INITREF(sav); +again: + sah = key_getsah(saidx); + if (sah == NULL) { + /* create a new SA index */ + sah = key_newsah(saidx); + if (sah == NULL) { + ipseclog((LOG_DEBUG, + "%s: No more memory.\n", __func__)); + *errp = ENOBUFS; goto done; } - } - - SECASVAR_LOCK_INIT(newsav); - - /* reset created */ - newsav->created = time_second; - newsav->pid = mhp->msg->sadb_msg_pid; + isnew = 1; + } else + isnew = 0; - /* add to satree */ - newsav->sah = sah; - sa_initref(newsav); - newsav->state = SADB_SASTATE_LARVAL; + sav->sah = sah; + if (mhp->msg->sadb_msg_type == SADB_GETSPI) { + sav->created = time_second; + } else if (sav->state == SADB_SASTATE_LARVAL) { + /* + * Do not call key_setsaval() second time in case + * of `goto again`. We will have MATURE state. + */ + *errp = key_setsaval(sav, mhp); + if (*errp != 0) + goto done; + sav->state = SADB_SASTATE_MATURE; + } - SAHTREE_LOCK(); - LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, - secasvar, chain); - SAHTREE_UNLOCK(); + SAHTREE_WLOCK(); + /* + * Check that existing SAH wasn't unlinked. + * Since we didn't hold the SAHTREE lock, it is possible, + * that callout handler or key_flush() or key_delete() could + * unlink this SAH. + */ + if (isnew == 0 && sah->state == SADB_SASTATE_DEAD) { + SAHTREE_WUNLOCK(); + key_freesah(&sah); /* reference from key_getsah() */ + goto again; + } + if (isnew != 0) { + /* + * Add new SAH into SADB. + * + * XXXAE: we can serialize key_add and key_getspi calls, so + * several threads will not fight in the race. + * Otherwise we should check under SAHTREE lock, that this + * SAH would not added twice. + */ + TAILQ_INSERT_HEAD(&V_sahtree, sah, chain); + /* Add new SAH into hash by addresses */ + LIST_INSERT_HEAD(SAHADDRHASH_HASH(saidx), sah, addrhash); + /* Now we are linked in the chain */ + sah->state = SADB_SASTATE_MATURE; + /* + * SAV references this new SAH. + * In case of existing SAH we reuse reference + * from key_getsah(). + */ + SAH_ADDREF(sah); + } + /* Link SAV with SAH */ + if (sav->state == SADB_SASTATE_MATURE) + TAILQ_INSERT_HEAD(&sah->savtree_alive, sav, chain); + else + TAILQ_INSERT_HEAD(&sah->savtree_larval, sav, chain); + /* Add SAV into SPI hash */ + LIST_INSERT_HEAD(SAVHASH_HASH(sav->spi), sav, spihash); + SAHTREE_WUNLOCK(); + *errp = 0; /* success */ done: - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s from %s:%u return SP:%p\n", __func__, - where, tag, newsav)); - - return newsav; + if (*errp != 0) { + if (sav != NULL) { + if (sav->lock != NULL) { + mtx_destroy(sav->lock); + free(sav->lock, M_IPSEC_MISC); + } + if (sav->lft_c != NULL) + uma_zfree(V_key_lft_zone, sav->lft_c); + free(sav, M_IPSEC_SA), sav = NULL; + } + if (sah != NULL) + key_freesah(&sah); + if (*errp == ENOBUFS) { + ipseclog((LOG_DEBUG, "%s: No more memory.\n", + __func__)); + PFKEYSTAT_INC(in_nomem); + } + } + return (sav); } /* @@ -2878,6 +2912,13 @@ done: static void key_cleansav(struct secasvar *sav) { + + if (sav->natt != NULL) { + free(sav->natt, M_IPSEC_MISC); + sav->natt = NULL; + } + if (sav->flags & SADB_X_EXT_F_CLONED) + return; /* * Cleanup xform state. Note that zeroize'ing causes the * keys to be cleared; otherwise we must do it ourself. @@ -2886,7 +2927,6 @@ key_cleansav(struct secasvar *sav) sav->tdb_xform->xf_zeroize(sav); sav->tdb_xform = NULL; } else { - KASSERT(sav->iv == NULL, ("iv but no xform")); if (sav->key_auth != NULL) bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); if (sav->key_enc != NULL) @@ -2904,19 +2944,12 @@ key_cleansav(struct secasvar *sav) free(sav->key_enc, M_IPSEC_MISC); sav->key_enc = NULL; } - if (sav->sched) { - bzero(sav->sched, sav->schedlen); - free(sav->sched, M_IPSEC_MISC); - sav->sched = NULL; - } if (sav->replay != NULL) { + if (sav->replay->bitmap != NULL) + free(sav->replay->bitmap, M_IPSEC_MISC); free(sav->replay, M_IPSEC_MISC); sav->replay = NULL; } - if (sav->lft_c != NULL) { - free(sav->lft_c, M_IPSEC_MISC); - sav->lft_c = NULL; - } if (sav->lft_h != NULL) { free(sav->lft_h, M_IPSEC_MISC); sav->lft_h = NULL; @@ -2931,202 +2964,288 @@ key_cleansav(struct secasvar *sav) * free() SA variable entry. */ static void -key_delsav(sav) - struct secasvar *sav; +key_delsav(struct secasvar *sav) { IPSEC_ASSERT(sav != NULL, ("null sav")); - IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); + IPSEC_ASSERT(sav->state == SADB_SASTATE_DEAD, + ("attempt to free non DEAD SA %p", sav)); + IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", + sav->refcnt)); - /* remove from SA header */ - if (__LIST_CHAINED(sav)) - LIST_REMOVE(sav, chain); + /* + * SA must be unlinked from the chain and hashtbl. + * If SA was cloned, we leave all fields untouched, + * except NAT-T config. + */ key_cleansav(sav); - SECASVAR_LOCK_DESTROY(sav); + if ((sav->flags & SADB_X_EXT_F_CLONED) == 0) { + mtx_destroy(sav->lock); + free(sav->lock, M_IPSEC_MISC); + uma_zfree(V_key_lft_zone, sav->lft_c); + } free(sav, M_IPSEC_SA); } /* - * search SAD. + * search SAH. * OUT: * NULL : not found - * others : found, pointer to a SA. + * others : found, referenced pointer to a SAH. */ static struct secashead * -key_getsah(saidx) - struct secasindex *saidx; +key_getsah(struct secasindex *saidx) { + SAHTREE_RLOCK_TRACKER; struct secashead *sah; - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (sah->state == SADB_SASTATE_DEAD) - continue; - if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) - break; + SAHTREE_RLOCK(); + LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) { + if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID) != 0) { + SAH_ADDREF(sah); + break; + } } - SAHTREE_UNLOCK(); - - return sah; + SAHTREE_RUNLOCK(); + return (sah); } /* - * check not to be duplicated SPI. - * NOTE: this function is too slow due to searching all SAD. + * Check not to be duplicated SPI. * OUT: - * NULL : not found - * others : found, pointer to a SA. + * 0 : not found + * 1 : found SA with given SPI. */ -static struct secasvar * -key_checkspidup(saidx, spi) - struct secasindex *saidx; - u_int32_t spi; +static int +key_checkspidup(uint32_t spi) { - struct secashead *sah; + SAHTREE_RLOCK_TRACKER; struct secasvar *sav; - /* check address family */ - if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { - ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", - __func__)); - return NULL; - } - - sav = NULL; - /* check all SAD */ - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) - continue; - sav = key_getsavbyspi(sah, spi); - if (sav != NULL) + /* Assume SPI is in network byte order */ + SAHTREE_RLOCK(); + LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) { + if (sav->spi == spi) break; } - SAHTREE_UNLOCK(); - - return sav; + SAHTREE_RUNLOCK(); + return (sav != NULL); } /* - * search SAD litmited alive SA, protocol, SPI. + * Search SA by SPI. * OUT: * NULL : not found - * others : found, pointer to a SA. + * others : found, referenced pointer to a SA. */ static struct secasvar * -key_getsavbyspi(sah, spi) - struct secashead *sah; - u_int32_t spi; +key_getsavbyspi(uint32_t spi) { + SAHTREE_RLOCK_TRACKER; struct secasvar *sav; - u_int stateidx, state; - - sav = NULL; - SAHTREE_LOCK_ASSERT(); - /* search all status */ - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_alive); - stateidx++) { - - state = saorder_state_alive[stateidx]; - LIST_FOREACH(sav, &sah->savtree[state], chain) { - - /* sanity check */ - if (sav->state != state) { - ipseclog((LOG_DEBUG, "%s: " - "invalid sav->state (queue: %d SA: %d)\n", - __func__, state, sav->state)); - continue; - } - if (sav->spi == spi) - return sav; - } + /* Assume SPI is in network byte order */ + SAHTREE_RLOCK(); + LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) { + if (sav->spi != spi) + continue; + SAV_ADDREF(sav); + break; } + SAHTREE_RUNLOCK(); + return (sav); +} - return NULL; +static int +key_updatelifetimes(struct secasvar *sav, const struct sadb_msghdr *mhp) +{ + struct seclifetime *lft_h, *lft_s, *tmp; + + /* Lifetime extension is optional, check that it is present. */ + if (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) && + SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) { + /* + * In case of SADB_UPDATE we may need to change + * existing lifetimes. + */ + if (sav->state == SADB_SASTATE_MATURE) { + lft_h = lft_s = NULL; + goto reset; + } + return (0); + } + /* Both HARD and SOFT extensions must present */ + if ((SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) && + !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) || + (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) && + !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); + return (EINVAL); + } + if (SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_HARD) || + SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_SOFT)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); + return (EINVAL); + } + lft_h = key_dup_lifemsg((const struct sadb_lifetime *) + mhp->ext[SADB_EXT_LIFETIME_HARD], M_IPSEC_MISC); + if (lft_h == NULL) { + PFKEYSTAT_INC(in_nomem); + ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); + return (ENOBUFS); + } + lft_s = key_dup_lifemsg((const struct sadb_lifetime *) + mhp->ext[SADB_EXT_LIFETIME_SOFT], M_IPSEC_MISC); + if (lft_s == NULL) { + PFKEYSTAT_INC(in_nomem); + free(lft_h, M_IPSEC_MISC); + ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); + return (ENOBUFS); + } +reset: + if (sav->state != SADB_SASTATE_LARVAL) { + /* + * key_update() holds reference to this SA, + * so it won't be deleted in meanwhile. + */ + SECASVAR_LOCK(sav); + tmp = sav->lft_h; + sav->lft_h = lft_h; + lft_h = tmp; + + tmp = sav->lft_s; + sav->lft_s = lft_s; + lft_s = tmp; + SECASVAR_UNLOCK(sav); + if (lft_h != NULL) + free(lft_h, M_IPSEC_MISC); + if (lft_s != NULL) + free(lft_s, M_IPSEC_MISC); + return (0); + } + /* We can update lifetime without holding a lock */ + IPSEC_ASSERT(sav->lft_h == NULL, ("lft_h is already initialized\n")); + IPSEC_ASSERT(sav->lft_s == NULL, ("lft_s is already initialized\n")); + sav->lft_h = lft_h; + sav->lft_s = lft_s; + return (0); } /* - * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. - * You must update these if need. + * copy SA values from PF_KEY message except *SPI, SEQ, PID and TYPE*. + * You must update these if need. Expects only LARVAL SAs. * OUT: 0: success. * !0: failure. - * - * does not modify mbuf. does not free mbuf on error. */ static int -key_setsaval(sav, m, mhp) - struct secasvar *sav; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_setsaval(struct secasvar *sav, const struct sadb_msghdr *mhp) { - int error = 0; + const struct sadb_sa *sa0; + const struct sadb_key *key0; + uint32_t replay; + size_t len; + int error; - IPSEC_ASSERT(m != NULL, ("null mbuf")); IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); + IPSEC_ASSERT(sav->state == SADB_SASTATE_LARVAL, + ("Attempt to update non LARVAL SA")); - /* initialization */ - sav->replay = NULL; - sav->key_auth = NULL; - sav->key_enc = NULL; - sav->sched = NULL; - sav->schedlen = 0; - sav->iv = NULL; - sav->lft_c = NULL; - sav->lft_h = NULL; - sav->lft_s = NULL; - sav->tdb_xform = NULL; /* transform */ - sav->tdb_encalgxform = NULL; /* encoding algorithm */ - sav->tdb_authalgxform = NULL; /* authentication algorithm */ - sav->tdb_compalgxform = NULL; /* compression algorithm */ - /* Initialize even if NAT-T not compiled in: */ - sav->natt_type = 0; - sav->natt_esp_frag_len = 0; + /* XXX rewrite */ + error = key_setident(sav->sah, mhp); + if (error != 0) + goto fail; /* SA */ - if (mhp->ext[SADB_EXT_SA] != NULL) { - const struct sadb_sa *sa0; - - sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; - if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { + if (!SADB_CHECKHDR(mhp, SADB_EXT_SA)) { + if (SADB_CHECKLEN(mhp, SADB_EXT_SA)) { error = EINVAL; goto fail; } - + sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; sav->alg_auth = sa0->sadb_sa_auth; sav->alg_enc = sa0->sadb_sa_encrypt; sav->flags = sa0->sadb_sa_flags; + if ((sav->flags & SADB_KEY_FLAGS_MAX) != sav->flags) { + ipseclog((LOG_DEBUG, + "%s: invalid sa_flags 0x%08x.\n", __func__, + sav->flags)); + error = EINVAL; + goto fail; + } + + /* Optional replay window */ + replay = 0; + if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) + replay = sa0->sadb_sa_replay; + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_SA_REPLAY)) { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA_REPLAY)) { + error = EINVAL; + goto fail; + } + replay = ((const struct sadb_x_sa_replay *) + mhp->ext[SADB_X_EXT_SA_REPLAY])->sadb_x_sa_replay_replay; + + if (replay > UINT32_MAX - 32) { + ipseclog((LOG_DEBUG, + "%s: replay window too big.\n", __func__)); + error = EINVAL; + goto fail; + } + + replay = (replay + 7) >> 3; + } + + sav->replay = malloc(sizeof(struct secreplay), M_IPSEC_MISC, + M_NOWAIT | M_ZERO); + if (sav->replay == NULL) { + PFKEYSTAT_INC(in_nomem); + ipseclog((LOG_DEBUG, "%s: No more memory.\n", + __func__)); + error = ENOBUFS; + goto fail; + } + + if (replay != 0) { + /* number of 32b blocks to be allocated */ + uint32_t bitmap_size; - /* replay window */ - if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { - sav->replay = (struct secreplay *) - malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); - if (sav->replay == NULL) { + /* RFC 6479: + * - the allocated replay window size must be + * a power of two. + * - use an extra 32b block as a redundant window. + */ + bitmap_size = 1; + while (replay + 4 > bitmap_size) + bitmap_size <<= 1; + bitmap_size = bitmap_size / 4; + + sav->replay->bitmap = malloc( + bitmap_size * sizeof(uint32_t), M_IPSEC_MISC, + M_NOWAIT | M_ZERO); + if (sav->replay->bitmap == NULL) { + PFKEYSTAT_INC(in_nomem); ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); error = ENOBUFS; goto fail; } - if (sa0->sadb_sa_replay != 0) - sav->replay->bitmap = (caddr_t)(sav->replay+1); - sav->replay->wsize = sa0->sadb_sa_replay; + sav->replay->bitmap_size = bitmap_size; + sav->replay->wsize = replay; } } /* Authentication keys */ - if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { - const struct sadb_key *key0; - int len; - - key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; - len = mhp->extlen[SADB_EXT_KEY_AUTH]; - - error = 0; - if (len < sizeof(*key0)) { + if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH)) { + if (SADB_CHECKLEN(mhp, SADB_EXT_KEY_AUTH)) { error = EINVAL; goto fail; } + error = 0; + key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; + len = mhp->extlen[SADB_EXT_KEY_AUTH]; switch (mhp->msg->sadb_msg_satype) { case SADB_SATYPE_AH: case SADB_SATYPE_ESP: @@ -3146,29 +3265,25 @@ key_setsaval(sav, m, mhp) goto fail; } - sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, - M_IPSEC_MISC); + sav->key_auth = key_dup_keymsg(key0, len, M_IPSEC_MISC); if (sav->key_auth == NULL ) { ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); + PFKEYSTAT_INC(in_nomem); error = ENOBUFS; goto fail; } } /* Encryption key */ - if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { - const struct sadb_key *key0; - int len; - - key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; - len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; - - error = 0; - if (len < sizeof(*key0)) { + if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT)) { + if (SADB_CHECKLEN(mhp, SADB_EXT_KEY_ENCRYPT)) { error = EINVAL; goto fail; } + error = 0; + key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; + len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; switch (mhp->msg->sadb_msg_satype) { case SADB_SATYPE_ESP: if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && @@ -3176,12 +3291,11 @@ key_setsaval(sav, m, mhp) error = EINVAL; break; } - sav->key_enc = (struct seckey *)key_dup_keymsg(key0, - len, - M_IPSEC_MISC); + sav->key_enc = key_dup_keymsg(key0, len, M_IPSEC_MISC); if (sav->key_enc == NULL) { ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); + PFKEYSTAT_INC(in_nomem); error = ENOBUFS; goto fail; } @@ -3206,172 +3320,83 @@ key_setsaval(sav, m, mhp) /* set iv */ sav->ivlen = 0; - switch (mhp->msg->sadb_msg_satype) { case SADB_SATYPE_AH: - error = xform_init(sav, XF_AH); - break; - case SADB_SATYPE_ESP: - error = xform_init(sav, XF_ESP); - break; - case SADB_X_SATYPE_IPCOMP: - error = xform_init(sav, XF_IPCOMP); - break; - case SADB_X_SATYPE_TCPSIGNATURE: - error = xform_init(sav, XF_TCPSIGNATURE); - break; - } - if (error) { - ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", - __func__, mhp->msg->sadb_msg_satype)); - goto fail; - } - - /* reset created */ - sav->created = time_second; - - /* make lifetime for CURRENT */ - sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); - if (sav->lft_c == NULL) { - ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); - error = ENOBUFS; - goto fail; - } - - sav->lft_c->allocations = 0; - sav->lft_c->bytes = 0; - sav->lft_c->addtime = time_second; - sav->lft_c->usetime = 0; - - /* lifetimes for HARD and SOFT */ - { - const struct sadb_lifetime *lft0; - - lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; - if (lft0 != NULL) { - if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { + if (sav->flags & SADB_X_EXT_DERIV) { + ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " + "given to AH SA.\n", __func__)); error = EINVAL; goto fail; } - sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); - if (sav->lft_h == NULL) { - ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); - error = ENOBUFS; - goto fail; - } - /* to be initialize ? */ - } - - lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; - if (lft0 != NULL) { - if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { + if (sav->alg_enc != SADB_EALG_NONE) { + ipseclog((LOG_DEBUG, "%s: protocol and algorithm " + "mismated.\n", __func__)); error = EINVAL; goto fail; } - sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); - if (sav->lft_s == NULL) { - ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); - error = ENOBUFS; - goto fail; - } - /* to be initialize ? */ - } - } - - return 0; - - fail: - /* initialization */ - key_cleansav(sav); - - return error; -} - -/* - * validation with a secasvar entry, and set SADB_SATYPE_MATURE. - * OUT: 0: valid - * other: errno - */ -static int -key_mature(struct secasvar *sav) -{ - int error; - - /* check SPI value */ - switch (sav->sah->saidx.proto) { - case IPPROTO_ESP: - case IPPROTO_AH: - /* - * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values - * 1-255 reserved by IANA for future use, - * 0 for implementation specific, local use. - */ - if (ntohl(sav->spi) <= 255) { - ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", - __func__, (u_int32_t)ntohl(sav->spi))); - return EINVAL; - } + error = xform_init(sav, XF_AH); break; - } - - /* check satype */ - switch (sav->sah->saidx.proto) { - case IPPROTO_ESP: - /* check flags */ - if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == - (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { + case SADB_SATYPE_ESP: + if ((sav->flags & (SADB_X_EXT_OLD | SADB_X_EXT_DERIV)) == + (SADB_X_EXT_OLD | SADB_X_EXT_DERIV)) { ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " - "given to old-esp.\n", __func__)); - return EINVAL; + "given to old-esp.\n", __func__)); + error = EINVAL; + goto fail; } error = xform_init(sav, XF_ESP); break; - case IPPROTO_AH: - /* check flags */ - if (sav->flags & SADB_X_EXT_DERIV) { - ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " - "given to AH SA.\n", __func__)); - return EINVAL; - } - if (sav->alg_enc != SADB_EALG_NONE) { - ipseclog((LOG_DEBUG, "%s: protocol and algorithm " - "mismated.\n", __func__)); - return(EINVAL); - } - error = xform_init(sav, XF_AH); - break; - case IPPROTO_IPCOMP: + case SADB_X_SATYPE_IPCOMP: if (sav->alg_auth != SADB_AALG_NONE) { ipseclog((LOG_DEBUG, "%s: protocol and algorithm " - "mismated.\n", __func__)); - return(EINVAL); + "mismated.\n", __func__)); + error = EINVAL; + goto fail; } - if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 - && ntohl(sav->spi) >= 0x10000) { + if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 && + ntohl(sav->spi) >= 0x10000) { ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", - __func__)); - return(EINVAL); + __func__)); + error = EINVAL; + goto fail; } error = xform_init(sav, XF_IPCOMP); break; - case IPPROTO_TCP: + case SADB_X_SATYPE_TCPSIGNATURE: if (sav->alg_enc != SADB_EALG_NONE) { ipseclog((LOG_DEBUG, "%s: protocol and algorithm " - "mismated.\n", __func__)); - return(EINVAL); + "mismated.\n", __func__)); + error = EINVAL; + goto fail; } error = xform_init(sav, XF_TCPSIGNATURE); break; default: ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); error = EPROTONOSUPPORT; - break; + goto fail; } - if (error == 0) { - SAHTREE_LOCK(); - key_sa_chgstate(sav, SADB_SASTATE_MATURE); - SAHTREE_UNLOCK(); + if (error) { + ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", + __func__, mhp->msg->sadb_msg_satype)); + goto fail; } + + /* Handle NAT-T headers */ + error = key_setnatt(sav, mhp); + if (error != 0) + goto fail; + + /* Initialize lifetime for CURRENT */ + sav->firstused = 0; + sav->created = time_second; + + /* lifetimes for HARD and SOFT */ + error = key_updatelifetimes(sav, mhp); + if (error == 0) + return (0); +fail: + key_cleansav(sav); return (error); } @@ -3379,32 +3404,32 @@ key_mature(struct secasvar *sav) * subroutine for SADB_GET and SADB_DUMP. */ static struct mbuf * -key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, - u_int32_t seq, u_int32_t pid) +key_setdumpsa(struct secasvar *sav, uint8_t type, uint8_t satype, + uint32_t seq, uint32_t pid) { + struct seclifetime lft_c; struct mbuf *result = NULL, *tres = NULL, *m; - int i; - int dumporder[] = { - SADB_EXT_SA, SADB_X_EXT_SA2, + int i, dumporder[] = { + SADB_EXT_SA, SADB_X_EXT_SA2, SADB_X_EXT_SA_REPLAY, SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, - SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, - SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, - SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, -#ifdef IPSEC_NAT_T + SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, + SADB_EXT_KEY_AUTH, SADB_EXT_KEY_ENCRYPT, + SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, + SADB_EXT_SENSITIVITY, SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG, -#endif }; + uint32_t replay_count; m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); if (m == NULL) goto fail; result = m; - for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { + for (i = nitems(dumporder) - 1; i >= 0; i--) { m = NULL; switch (dumporder[i]) { case SADB_EXT_SA: @@ -3414,13 +3439,25 @@ key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, break; case SADB_X_EXT_SA2: - m = key_setsadbxsa2(sav->sah->saidx.mode, - sav->replay ? sav->replay->count : 0, + SECASVAR_LOCK(sav); + replay_count = sav->replay ? sav->replay->count : 0; + SECASVAR_UNLOCK(sav); + m = key_setsadbxsa2(sav->sah->saidx.mode, replay_count, sav->sah->saidx.reqid); if (!m) goto fail; break; + case SADB_X_EXT_SA_REPLAY: + if (sav->replay == NULL || + sav->replay->wsize <= UINT8_MAX) + continue; + + m = key_setsadbxsareplay(sav->replay->wsize); + if (!m) + goto fail; + break; + case SADB_EXT_ADDRESS_SRC: m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, @@ -3454,10 +3491,12 @@ key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, break; case SADB_EXT_LIFETIME_CURRENT: - if (!sav->lft_c) - continue; - m = key_setlifetime(sav->lft_c, - SADB_EXT_LIFETIME_CURRENT); + lft_c.addtime = sav->created; + lft_c.allocations = (uint32_t)counter_u64_fetch( + sav->lft_c_allocations); + lft_c.bytes = counter_u64_fetch(sav->lft_c_bytes); + lft_c.usetime = sav->firstused; + m = key_setlifetime(&lft_c, SADB_EXT_LIFETIME_CURRENT); if (!m) goto fail; break; @@ -3481,35 +3520,53 @@ key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, goto fail; break; -#ifdef IPSEC_NAT_T case SADB_X_EXT_NAT_T_TYPE: - m = key_setsadbxtype(sav->natt_type); + if (sav->natt == NULL) + continue; + m = key_setsadbxtype(UDP_ENCAP_ESPINUDP); if (!m) goto fail; break; - + case SADB_X_EXT_NAT_T_DPORT: - m = key_setsadbxport( - KEY_PORTFROMSADDR(&sav->sah->saidx.dst), + if (sav->natt == NULL) + continue; + m = key_setsadbxport(sav->natt->dport, SADB_X_EXT_NAT_T_DPORT); if (!m) goto fail; break; case SADB_X_EXT_NAT_T_SPORT: - m = key_setsadbxport( - KEY_PORTFROMSADDR(&sav->sah->saidx.src), + if (sav->natt == NULL) + continue; + m = key_setsadbxport(sav->natt->sport, SADB_X_EXT_NAT_T_SPORT); if (!m) goto fail; break; case SADB_X_EXT_NAT_T_OAI: + if (sav->natt == NULL || + (sav->natt->flags & IPSEC_NATT_F_OAI) == 0) + continue; + m = key_setsadbaddr(SADB_X_EXT_NAT_T_OAI, + &sav->natt->oai.sa, FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) + goto fail; + break; case SADB_X_EXT_NAT_T_OAR: + if (sav->natt == NULL || + (sav->natt->flags & IPSEC_NATT_F_OAR) == 0) + continue; + m = key_setsadbaddr(SADB_X_EXT_NAT_T_OAR, + &sav->natt->oar.sa, FULLMASK, IPSEC_ULPROTO_ANY); + if (!m) + goto fail; + break; case SADB_X_EXT_NAT_T_FRAG: /* We do not (yet) support those. */ continue; -#endif case SADB_EXT_ADDRESS_PROXY: case SADB_EXT_IDENTITY_SRC: @@ -3525,10 +3582,10 @@ key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, if (tres) m_cat(m, tres); tres = m; - } m_cat(result, tres); + tres = NULL; if (result->m_len < sizeof(struct sadb_msg)) { result = m_pullup(result, sizeof(struct sadb_msg)); if (result == NULL) @@ -3564,10 +3621,9 @@ key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); if (len > MCLBYTES) return NULL; - MGETHDR(m, M_DONTWAIT, MT_DATA); + MGETHDR(m, M_NOWAIT, MT_DATA); if (m && len > MHLEN) { - MCLGET(m, M_DONTWAIT); - if ((m->m_flags & M_EXT) == 0) { + if (!(MCLGET(m, M_NOWAIT))) { m_freem(m); m = NULL; } @@ -3596,41 +3652,39 @@ key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, * copy secasvar data into sadb_address. */ static struct mbuf * -key_setsadbsa(sav) - struct secasvar *sav; +key_setsadbsa(struct secasvar *sav) { struct mbuf *m; struct sadb_sa *p; int len; len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); - return NULL; - } - + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) + return (NULL); + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_sa *); - bzero(p, len); p->sadb_sa_len = PFKEY_UNIT64(len); p->sadb_sa_exttype = SADB_EXT_SA; p->sadb_sa_spi = sav->spi; - p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); + p->sadb_sa_replay = sav->replay ? + (sav->replay->wsize > UINT8_MAX ? UINT8_MAX : + sav->replay->wsize): 0; p->sadb_sa_state = sav->state; p->sadb_sa_auth = sav->alg_auth; p->sadb_sa_encrypt = sav->alg_enc; - p->sadb_sa_flags = sav->flags; - - return m; + p->sadb_sa_flags = sav->flags & SADB_KEY_FLAGS_MAX; + return (m); } /* * set data into sadb_address. */ static struct mbuf * -key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) +key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, + u_int8_t prefixlen, u_int16_t ul_proto) { struct mbuf *m; struct sadb_address *p; @@ -3638,13 +3692,11 @@ key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefix len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + PFKEY_ALIGN8(saddr->sa_len); - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); - return NULL; - } - + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) + return (NULL); + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_address *); bzero(p, len); @@ -3684,13 +3736,11 @@ key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) size_t len; len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); - return NULL; - } - + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) + return (NULL); + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_x_sa2 *); bzero(p, len); @@ -3705,7 +3755,32 @@ key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) return m; } -#ifdef IPSEC_NAT_T +/* + * Set data into sadb_x_sa_replay. + */ +static struct mbuf * +key_setsadbxsareplay(u_int32_t replay) +{ + struct mbuf *m; + struct sadb_x_sa_replay *p; + size_t len; + + len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa_replay)); + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) + return (NULL); + m_align(m, len); + m->m_len = len; + p = mtod(m, struct sadb_x_sa_replay *); + + bzero(p, len); + p->sadb_x_sa_replay_len = PFKEY_UNIT64(len); + p->sadb_x_sa_replay_exttype = SADB_X_EXT_SA_REPLAY; + p->sadb_x_sa_replay_replay = (replay << 3); + + return m; +} + /* * Set a type in sadb_x_nat_t_type. */ @@ -3718,13 +3793,11 @@ key_setsadbxtype(u_int16_t type) len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) return (NULL); - } - + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_x_nat_t_type *); bzero(p, len); @@ -3747,13 +3820,11 @@ key_setsadbxport(u_int16_t port, u_int16_t type) len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) return (NULL); - } - + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_x_nat_t_port *); bzero(p, len); @@ -3764,10 +3835,10 @@ key_setsadbxport(u_int16_t port, u_int16_t type) return (m); } -/* +/* * Get port from sockaddr. Port is in network byte order. */ -u_int16_t +uint16_t key_portfromsaddr(struct sockaddr *sa) { @@ -3781,18 +3852,14 @@ key_portfromsaddr(struct sockaddr *sa) return ((struct sockaddr_in6 *)sa)->sin6_port; #endif } - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s unexpected address family %d\n", - __func__, sa->sa_family)); return (0); } -#endif /* IPSEC_NAT_T */ /* * Set port in struct sockaddr. Port is in network byte order. */ -static void -key_porttosaddr(struct sockaddr *sa, u_int16_t port) +void +key_porttosaddr(struct sockaddr *sa, uint16_t port) { switch (sa->sa_family) { @@ -3817,20 +3884,18 @@ key_porttosaddr(struct sockaddr *sa, u_int16_t port) * set data into sadb_x_policy */ static struct mbuf * -key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) +key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id, u_int32_t priority) { struct mbuf *m; struct sadb_x_policy *p; size_t len; len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); - return NULL; - } - + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) + return (NULL); + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_x_policy *); bzero(p, len); @@ -3839,6 +3904,7 @@ key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) p->sadb_x_policy_type = type; p->sadb_x_policy_dir = dir; p->sadb_x_policy_id = id; + p->sadb_x_policy_priority = priority; return m; } @@ -3851,29 +3917,29 @@ key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) * OUT: NULL no more memory */ struct seckey * -key_dup_keymsg(const struct sadb_key *src, u_int len, - struct malloc_type *type) +key_dup_keymsg(const struct sadb_key *src, size_t len, + struct malloc_type *type) { struct seckey *dst; - dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); + + dst = malloc(sizeof(*dst), type, M_NOWAIT); if (dst != NULL) { dst->bits = src->sadb_key_bits; - dst->key_data = (char *)malloc(len, type, M_NOWAIT); + dst->key_data = malloc(len, type, M_NOWAIT); if (dst->key_data != NULL) { - bcopy((const char *)src + sizeof(struct sadb_key), - dst->key_data, len); + bcopy((const char *)(src + 1), dst->key_data, len); } else { - ipseclog((LOG_DEBUG, "%s: No more memory.\n", - __func__)); + ipseclog((LOG_DEBUG, "%s: No more memory.\n", + __func__)); free(dst, type); dst = NULL; } } else { - ipseclog((LOG_DEBUG, "%s: No more memory.\n", - __func__)); + ipseclog((LOG_DEBUG, "%s: No more memory.\n", + __func__)); } - return dst; + return (dst); } /* Take a lifetime message (sadb_lifetime) passed in on a socket and @@ -3884,118 +3950,21 @@ key_dup_keymsg(const struct sadb_key *src, u_int len, */ static struct seclifetime * -key_dup_lifemsg(const struct sadb_lifetime *src, - struct malloc_type *type) +key_dup_lifemsg(const struct sadb_lifetime *src, struct malloc_type *type) { - struct seclifetime *dst = NULL; + struct seclifetime *dst; - dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), - type, M_NOWAIT); + dst = malloc(sizeof(*dst), type, M_NOWAIT); if (dst == NULL) { - /* XXX counter */ ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); - } else { - dst->allocations = src->sadb_lifetime_allocations; - dst->bytes = src->sadb_lifetime_bytes; - dst->addtime = src->sadb_lifetime_addtime; - dst->usetime = src->sadb_lifetime_usetime; - } - return dst; -} - -/* compare my own address - * OUT: 1: true, i.e. my address. - * 0: false - */ -int -key_ismyaddr(sa) - struct sockaddr *sa; -{ -#ifdef INET - struct sockaddr_in *sin; - struct in_ifaddr *ia; -#endif - - IPSEC_ASSERT(sa != NULL, ("null sockaddr")); - - switch (sa->sa_family) { -#ifdef INET - case AF_INET: - sin = (struct sockaddr_in *)sa; - IN_IFADDR_RLOCK(); - for (ia = V_in_ifaddrhead.tqh_first; ia; - ia = ia->ia_link.tqe_next) - { - if (sin->sin_family == ia->ia_addr.sin_family && - sin->sin_len == ia->ia_addr.sin_len && - sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) - { - IN_IFADDR_RUNLOCK(); - return 1; - } - } - IN_IFADDR_RUNLOCK(); - break; -#endif -#ifdef INET6 - case AF_INET6: - return key_ismyaddr6((struct sockaddr_in6 *)sa); -#endif - } - - return 0; -} - -#ifdef INET6 -/* - * compare my own address for IPv6. - * 1: ours - * 0: other - * NOTE: derived ip6_input() in KAME. This is necessary to modify more. - */ -#include <netinet6/in6_var.h> - -static int -key_ismyaddr6(sin6) - struct sockaddr_in6 *sin6; -{ - struct in6_ifaddr *ia; -#if 0 - struct in6_multi *in6m; -#endif - - IN6_IFADDR_RLOCK(); - TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { - if (key_sockaddrcmp((struct sockaddr *)&sin6, - (struct sockaddr *)&ia->ia_addr, 0) == 0) { - IN6_IFADDR_RUNLOCK(); - return 1; - } - -#if 0 - /* - * XXX Multicast - * XXX why do we care about multlicast here while we don't care - * about IPv4 multicast?? - * XXX scope - */ - in6m = NULL; - IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); - if (in6m) { - IN6_IFADDR_RUNLOCK(); - return 1; - } -#endif + return (NULL); } - IN6_IFADDR_RUNLOCK(); - - /* loopback, just for safety */ - if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) - return 1; - - return 0; + dst->allocations = src->sadb_lifetime_allocations; + dst->bytes = src->sadb_lifetime_bytes; + dst->addtime = src->sadb_lifetime_addtime; + dst->usetime = src->sadb_lifetime_usetime; + return (dst); } -#endif /*INET6*/ /* * compare two secasindex structure. @@ -4010,12 +3979,9 @@ key_ismyaddr6(sin6) * 0 : not equal */ static int -key_cmpsaidx( - const struct secasindex *saidx0, - const struct secasindex *saidx1, - int flag) +key_cmpsaidx(const struct secasindex *saidx0, const struct secasindex *saidx1, + int flag) { - int chkport = 0; /* sanity */ if (saidx0 == NULL && saidx1 == NULL) @@ -4032,19 +3998,21 @@ key_cmpsaidx( return 0; if (saidx0->reqid != saidx1->reqid) return 0; - if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || - bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) + if (bcmp(&saidx0->src, &saidx1->src, + saidx0->src.sa.sa_len) != 0 || + bcmp(&saidx0->dst, &saidx1->dst, + saidx0->dst.sa.sa_len) != 0) return 0; } else { /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ - if (flag == CMP_MODE_REQID - ||flag == CMP_REQID) { + if (flag == CMP_MODE_REQID || flag == CMP_REQID) { /* * If reqid of SPD is non-zero, unique SA is required. * The result must be of same reqid in this case. */ - if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) + if (saidx1->reqid != 0 && + saidx0->reqid != saidx1->reqid) return 0; } @@ -4054,27 +4022,10 @@ key_cmpsaidx( return 0; } -#ifdef IPSEC_NAT_T - /* - * If NAT-T is enabled, check ports for tunnel mode. - * Do not check ports if they are set to zero in the SPD. - * Also do not do it for transport mode, as there is no - * port information available in the SP. - */ - if (saidx1->mode == IPSEC_MODE_TUNNEL && - saidx1->src.sa.sa_family == AF_INET && - saidx1->dst.sa.sa_family == AF_INET && - ((const struct sockaddr_in *)(&saidx1->src))->sin_port && - ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) - chkport = 1; -#endif /* IPSEC_NAT_T */ - - if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { + if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) return 0; - } - if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { + if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) return 0; - } } return 1; @@ -4090,9 +4041,8 @@ key_cmpsaidx( * 0 : not equal */ static int -key_cmpspidx_exactly( - struct secpolicyindex *spidx0, - struct secpolicyindex *spidx1) +key_cmpspidx_exactly(struct secpolicyindex *spidx0, + struct secpolicyindex *spidx1) { /* sanity */ if (spidx0 == NULL && spidx1 == NULL) @@ -4120,9 +4070,8 @@ key_cmpspidx_exactly( * 0 : not equal */ static int -key_cmpspidx_withmask( - struct secpolicyindex *spidx0, - struct secpolicyindex *spidx1) +key_cmpspidx_withmask(struct secpolicyindex *spidx0, + struct secpolicyindex *spidx1) { /* sanity */ if (spidx0 == NULL && spidx1 == NULL) @@ -4211,13 +4160,6 @@ key_cmpspidx_withmask( return 1; } -/* returns 0 on match */ -static int -key_sockaddrcmp( - const struct sockaddr *sa1, - const struct sockaddr *sa2, - int port) -{ #ifdef satosin #undef satosin #endif @@ -4226,10 +4168,16 @@ key_sockaddrcmp( #undef satosin6 #endif #define satosin6(s) ((const struct sockaddr_in6 *)s) +/* returns 0 on match */ +int +key_sockaddrcmp(const struct sockaddr *sa1, const struct sockaddr *sa2, + int port) +{ if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) return 1; switch (sa1->sa_family) { +#ifdef INET case AF_INET: if (sa1->sa_len != sizeof(struct sockaddr_in)) return 1; @@ -4240,6 +4188,8 @@ key_sockaddrcmp( if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) return 1; break; +#endif +#ifdef INET6 case AF_INET6: if (sa1->sa_len != sizeof(struct sockaddr_in6)) return 1; /*EINVAL*/ @@ -4256,6 +4206,7 @@ key_sockaddrcmp( return 1; } break; +#endif default: if (bcmp(sa1, sa2, sa1->sa_len) != 0) return 1; @@ -4263,9 +4214,35 @@ key_sockaddrcmp( } return 0; +} + +/* returns 0 on match */ +int +key_sockaddrcmp_withmask(const struct sockaddr *sa1, + const struct sockaddr *sa2, size_t mask) +{ + if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) + return (1); + + switch (sa1->sa_family) { +#ifdef INET + case AF_INET: + return (!key_bbcmp(&satosin(sa1)->sin_addr, + &satosin(sa2)->sin_addr, mask)); +#endif +#ifdef INET6 + case AF_INET6: + if (satosin6(sa1)->sin6_scope_id != + satosin6(sa2)->sin6_scope_id) + return (1); + return (!key_bbcmp(&satosin6(sa1)->sin6_addr, + &satosin6(sa2)->sin6_addr, mask)); +#endif + } + return (1); +} #undef satosin #undef satosin6 -} /* * compare two buffers with mask. @@ -4307,185 +4284,256 @@ key_bbcmp(const void *a1, const void *a2, u_int bits) static void key_flush_spd(time_t now) { - static u_int16_t sptree_scangen = 0; - u_int16_t gen = sptree_scangen++; - struct secpolicy *sp; + SPTREE_RLOCK_TRACKER; + struct secpolicy_list drainq; + struct secpolicy *sp, *nextsp; u_int dir; - /* SPD */ + LIST_INIT(&drainq); + SPTREE_RLOCK(); for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { -restart: - SPTREE_LOCK(); - LIST_FOREACH(sp, &V_sptree[dir], chain) { - if (sp->scangen == gen) /* previously handled */ - continue; - sp->scangen = gen; - if (sp->state == IPSEC_SPSTATE_DEAD && - sp->refcnt == 1) { - /* - * Ensure that we only decrease refcnt once, - * when we're the last consumer. - * Directly call SP_DELREF/key_delsp instead - * of KEY_FREESP to avoid unlocking/relocking - * SPTREE_LOCK before key_delsp: may refcnt - * be increased again during that time ? - * NB: also clean entries created by - * key_spdflush - */ - SP_DELREF(sp); - key_delsp(sp); - SPTREE_UNLOCK(); - goto restart; - } + TAILQ_FOREACH(sp, &V_sptree[dir], chain) { if (sp->lifetime == 0 && sp->validtime == 0) continue; - if ((sp->lifetime && now - sp->created > sp->lifetime) - || (sp->validtime && now - sp->lastused > sp->validtime)) { - sp->state = IPSEC_SPSTATE_DEAD; - SPTREE_UNLOCK(); - key_spdexpire(sp); - goto restart; + if ((sp->lifetime && + now - sp->created > sp->lifetime) || + (sp->validtime && + now - sp->lastused > sp->validtime)) { + /* Hold extra reference to send SPDEXPIRE */ + SP_ADDREF(sp); + LIST_INSERT_HEAD(&drainq, sp, drainq); } } - SPTREE_UNLOCK(); + } + SPTREE_RUNLOCK(); + if (LIST_EMPTY(&drainq)) + return; + + SPTREE_WLOCK(); + sp = LIST_FIRST(&drainq); + while (sp != NULL) { + nextsp = LIST_NEXT(sp, drainq); + /* Check that SP is still linked */ + if (sp->state != IPSEC_SPSTATE_ALIVE) { + LIST_REMOVE(sp, drainq); + key_freesp(&sp); /* release extra reference */ + sp = nextsp; + continue; + } + TAILQ_REMOVE(&V_sptree[sp->spidx.dir], sp, chain); + LIST_REMOVE(sp, idhash); + sp->state = IPSEC_SPSTATE_DEAD; + sp = nextsp; + } + V_sp_genid++; + SPTREE_WUNLOCK(); + + sp = LIST_FIRST(&drainq); + while (sp != NULL) { + nextsp = LIST_NEXT(sp, drainq); + key_spdexpire(sp); + key_freesp(&sp); /* release extra reference */ + key_freesp(&sp); /* release last reference */ + sp = nextsp; } } static void key_flush_sad(time_t now) { + SAHTREE_RLOCK_TRACKER; + struct secashead_list emptyq; + struct secasvar_list drainq, hexpireq, sexpireq, freeq; struct secashead *sah, *nextsah; struct secasvar *sav, *nextsav; - /* SAD */ - SAHTREE_LOCK(); - LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { - /* if sah has been dead, then delete it and process next sah. */ - if (sah->state == SADB_SASTATE_DEAD) { - key_delsah(sah); + LIST_INIT(&drainq); + LIST_INIT(&hexpireq); + LIST_INIT(&sexpireq); + LIST_INIT(&emptyq); + + SAHTREE_RLOCK(); + TAILQ_FOREACH(sah, &V_sahtree, chain) { + /* Check for empty SAH */ + if (TAILQ_EMPTY(&sah->savtree_larval) && + TAILQ_EMPTY(&sah->savtree_alive)) { + SAH_ADDREF(sah); + LIST_INSERT_HEAD(&emptyq, sah, drainq); continue; } - - /* if LARVAL entry doesn't become MATURE, delete it. */ - LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { - /* Need to also check refcnt for a larval SA ??? */ - if (now - sav->created > V_key_larval_lifetime) - KEY_FREESAV(&sav); + /* Add all stale LARVAL SAs into drainq */ + TAILQ_FOREACH(sav, &sah->savtree_larval, chain) { + if (now - sav->created < V_key_larval_lifetime) + continue; + SAV_ADDREF(sav); + LIST_INSERT_HEAD(&drainq, sav, drainq); } - - /* - * check MATURE entry to start to send expire message - * whether or not. - */ - LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { - /* we don't need to check. */ - if (sav->lft_s == NULL) + TAILQ_FOREACH(sav, &sah->savtree_alive, chain) { + /* lifetimes aren't specified */ + if (sav->lft_h == NULL) continue; - - /* sanity check */ - if (sav->lft_c == NULL) { - ipseclog((LOG_DEBUG,"%s: there is no CURRENT " - "time, why?\n", __func__)); + SECASVAR_LOCK(sav); + /* + * Check again with lock held, because it may + * be updated by SADB_UPDATE. + */ + if (sav->lft_h == NULL) { + SECASVAR_UNLOCK(sav); continue; } - - /* check SOFT lifetime */ - if (sav->lft_s->addtime != 0 && - now - sav->created > sav->lft_s->addtime) { - key_sa_chgstate(sav, SADB_SASTATE_DYING); - /* - * Actually, only send expire message if - * SA has been used, as it was done before, - * but should we always send such message, - * and let IKE daemon decide if it should be - * renegotiated or not ? - * XXX expire message will actually NOT be - * sent if SA is only used after soft - * lifetime has been reached, see below - * (DYING state) - */ - if (sav->lft_c->usetime != 0) - key_expire(sav); - } - /* check SOFT lifetime by bytes */ /* - * XXX I don't know the way to delete this SA - * when new SA is installed. Caution when it's - * installed too big lifetime by time. + * RFC 2367: + * HARD lifetimes MUST take precedence over SOFT + * lifetimes, meaning if the HARD and SOFT lifetimes + * are the same, the HARD lifetime will appear on the + * EXPIRE message. */ - else if (sav->lft_s->bytes != 0 && - sav->lft_s->bytes < sav->lft_c->bytes) { - - key_sa_chgstate(sav, SADB_SASTATE_DYING); - /* - * XXX If we keep to send expire - * message in the status of - * DYING. Do remove below code. - */ - key_expire(sav); - } - } - - /* check DYING entry to change status to DEAD. */ - LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { - /* we don't need to check. */ - if (sav->lft_h == NULL) + /* check HARD lifetime */ + if ((sav->lft_h->addtime != 0 && + now - sav->created > sav->lft_h->addtime) || + (sav->lft_h->usetime != 0 && sav->firstused && + now - sav->firstused > sav->lft_h->usetime) || + (sav->lft_h->bytes != 0 && counter_u64_fetch( + sav->lft_c_bytes) > sav->lft_h->bytes)) { + SECASVAR_UNLOCK(sav); + SAV_ADDREF(sav); + LIST_INSERT_HEAD(&hexpireq, sav, drainq); continue; - - /* sanity check */ - if (sav->lft_c == NULL) { - ipseclog((LOG_DEBUG, "%s: there is no CURRENT " - "time, why?\n", __func__)); + } + /* check SOFT lifetime (only for MATURE SAs) */ + if (sav->state == SADB_SASTATE_MATURE && ( + (sav->lft_s->addtime != 0 && + now - sav->created > sav->lft_s->addtime) || + (sav->lft_s->usetime != 0 && sav->firstused && + now - sav->firstused > sav->lft_s->usetime) || + (sav->lft_s->bytes != 0 && counter_u64_fetch( + sav->lft_c_bytes) > sav->lft_s->bytes))) { + SECASVAR_UNLOCK(sav); + SAV_ADDREF(sav); + LIST_INSERT_HEAD(&sexpireq, sav, drainq); continue; } + SECASVAR_UNLOCK(sav); + } + } + SAHTREE_RUNLOCK(); - if (sav->lft_h->addtime != 0 && - now - sav->created > sav->lft_h->addtime) { - key_sa_chgstate(sav, SADB_SASTATE_DEAD); - KEY_FREESAV(&sav); - } -#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ - else if (sav->lft_s != NULL - && sav->lft_s->addtime != 0 - && now - sav->created > sav->lft_s->addtime) { - /* - * XXX: should be checked to be - * installed the valid SA. - */ + if (LIST_EMPTY(&emptyq) && LIST_EMPTY(&drainq) && + LIST_EMPTY(&hexpireq) && LIST_EMPTY(&sexpireq)) + return; - /* - * If there is no SA then sending - * expire message. - */ - key_expire(sav); - } -#endif - /* check HARD lifetime by bytes */ - else if (sav->lft_h->bytes != 0 && - sav->lft_h->bytes < sav->lft_c->bytes) { - key_sa_chgstate(sav, SADB_SASTATE_DEAD); - KEY_FREESAV(&sav); - } + LIST_INIT(&freeq); + SAHTREE_WLOCK(); + /* Unlink stale LARVAL SAs */ + sav = LIST_FIRST(&drainq); + while (sav != NULL) { + nextsav = LIST_NEXT(sav, drainq); + /* Check that SA is still LARVAL */ + if (sav->state != SADB_SASTATE_LARVAL) { + LIST_REMOVE(sav, drainq); + LIST_INSERT_HEAD(&freeq, sav, drainq); + sav = nextsav; + continue; } - - /* delete entry in DEAD */ - LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { - /* sanity check */ - if (sav->state != SADB_SASTATE_DEAD) { - ipseclog((LOG_DEBUG, "%s: invalid sav->state " - "(queue: %d SA: %d): kill it anyway\n", - __func__, - SADB_SASTATE_DEAD, sav->state)); - } - /* - * do not call key_freesav() here. - * sav should already be freed, and sav->refcnt - * shows other references to sav - * (such as from SPD). - */ + TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain); + LIST_REMOVE(sav, spihash); + sav->state = SADB_SASTATE_DEAD; + sav = nextsav; + } + /* Unlink all SAs with expired HARD lifetime */ + sav = LIST_FIRST(&hexpireq); + while (sav != NULL) { + nextsav = LIST_NEXT(sav, drainq); + /* Check that SA is not unlinked */ + if (sav->state == SADB_SASTATE_DEAD) { + LIST_REMOVE(sav, drainq); + LIST_INSERT_HEAD(&freeq, sav, drainq); + sav = nextsav; + continue; + } + TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain); + LIST_REMOVE(sav, spihash); + sav->state = SADB_SASTATE_DEAD; + sav = nextsav; + } + /* Mark all SAs with expired SOFT lifetime as DYING */ + sav = LIST_FIRST(&sexpireq); + while (sav != NULL) { + nextsav = LIST_NEXT(sav, drainq); + /* Check that SA is not unlinked */ + if (sav->state == SADB_SASTATE_DEAD) { + LIST_REMOVE(sav, drainq); + LIST_INSERT_HEAD(&freeq, sav, drainq); + sav = nextsav; + continue; + } + /* + * NOTE: this doesn't change SA order in the chain. + */ + sav->state = SADB_SASTATE_DYING; + sav = nextsav; + } + /* Unlink empty SAHs */ + sah = LIST_FIRST(&emptyq); + while (sah != NULL) { + nextsah = LIST_NEXT(sah, drainq); + /* Check that SAH is still empty and not unlinked */ + if (sah->state == SADB_SASTATE_DEAD || + !TAILQ_EMPTY(&sah->savtree_larval) || + !TAILQ_EMPTY(&sah->savtree_alive)) { + LIST_REMOVE(sah, drainq); + key_freesah(&sah); /* release extra reference */ + sah = nextsah; + continue; } + TAILQ_REMOVE(&V_sahtree, sah, chain); + LIST_REMOVE(sah, addrhash); + sah->state = SADB_SASTATE_DEAD; + sah = nextsah; + } + SAHTREE_WUNLOCK(); + + /* Send SPDEXPIRE messages */ + sav = LIST_FIRST(&hexpireq); + while (sav != NULL) { + nextsav = LIST_NEXT(sav, drainq); + key_expire(sav, 1); + key_freesah(&sav->sah); /* release reference from SAV */ + key_freesav(&sav); /* release extra reference */ + key_freesav(&sav); /* release last reference */ + sav = nextsav; + } + sav = LIST_FIRST(&sexpireq); + while (sav != NULL) { + nextsav = LIST_NEXT(sav, drainq); + key_expire(sav, 0); + key_freesav(&sav); /* release extra reference */ + sav = nextsav; + } + /* Free stale LARVAL SAs */ + sav = LIST_FIRST(&drainq); + while (sav != NULL) { + nextsav = LIST_NEXT(sav, drainq); + key_freesah(&sav->sah); /* release reference from SAV */ + key_freesav(&sav); /* release extra reference */ + key_freesav(&sav); /* release last reference */ + sav = nextsav; + } + /* Free SAs that were unlinked/changed by someone else */ + sav = LIST_FIRST(&freeq); + while (sav != NULL) { + nextsav = LIST_NEXT(sav, drainq); + key_freesav(&sav); /* release extra reference */ + sav = nextsav; + } + /* Free empty SAH */ + sah = LIST_FIRST(&emptyq); + while (sah != NULL) { + nextsah = LIST_NEXT(sah, drainq); + key_freesah(&sah); /* release extra reference */ + key_freesah(&sah); /* release last reference */ + sah = nextsah; } - SAHTREE_UNLOCK(); } static void @@ -4495,13 +4543,16 @@ key_flush_acq(time_t now) /* ACQ tree */ ACQ_LOCK(); - for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { + acq = LIST_FIRST(&V_acqtree); + while (acq != NULL) { nextacq = LIST_NEXT(acq, chain); - if (now - acq->created > V_key_blockacq_lifetime - && __LIST_CHAINED(acq)) { + if (now - acq->created > V_key_blockacq_lifetime) { LIST_REMOVE(acq, chain); + LIST_REMOVE(acq, addrhash); + LIST_REMOVE(acq, seqhash); free(acq, M_IPSEC_SAQ); } + acq = nextacq; } ACQ_UNLOCK(); } @@ -4530,8 +4581,8 @@ key_flush_spacq(time_t now) * and do to remove or to expire. * XXX: year 2038 problem may remain. */ -void -key_timehandler(void) +static void +key_timehandler(void *arg) { VNET_ITERATOR_DECL(vnet_iter); time_t now = time_second; @@ -4549,7 +4600,7 @@ key_timehandler(void) #ifndef IPSEC_DEBUG2 /* do exchange to tick time !! */ - (void)timeout((void *)key_timehandler, (void *)0, hz); + callout_schedule(&key_timer, hz); #endif /* IPSEC_DEBUG2 */ } @@ -4563,9 +4614,7 @@ key_random() } void -key_randomfill(p, l) - void *p; - size_t l; +key_randomfill(void *p, size_t l) { size_t n; u_long v; @@ -4594,8 +4643,8 @@ key_randomfill(p, l) * OUT: * 0: invalid satype. */ -static u_int16_t -key_satype2proto(u_int8_t satype) +static uint8_t +key_satype2proto(uint8_t satype) { switch (satype) { case SADB_SATYPE_UNSPEC: @@ -4619,8 +4668,8 @@ key_satype2proto(u_int8_t satype) * OUT: * 0: invalid protocol type. */ -static u_int8_t -key_proto2satype(u_int16_t proto) +static uint8_t +key_proto2satype(uint8_t proto) { switch (proto) { case IPPROTO_AH: @@ -4651,44 +4700,58 @@ key_proto2satype(u_int16_t proto) * other if success, return pointer to the message to send. */ static int -key_getspi(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_getspi(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - struct sadb_address *src0, *dst0; struct secasindex saidx; - struct secashead *newsah; - struct secasvar *newsav; - u_int8_t proto; - u_int32_t spi; - u_int8_t mode; - u_int32_t reqid; + struct sadb_address *src0, *dst0; + struct secasvar *sav; + uint32_t reqid, spi; int error; + uint8_t mode, proto; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); - if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); - return key_senderror(so, m, EINVAL); + if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) +#ifdef PFKEY_STRICT_CHECKS + || SADB_CHECKHDR(mhp, SADB_EXT_SPIRANGE) +#endif + ) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); + error = EINVAL; + goto fail; } - if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); - return key_senderror(so, m, EINVAL); + if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) +#ifdef PFKEY_STRICT_CHECKS + || SADB_CHECKLEN(mhp, SADB_EXT_SPIRANGE) +#endif + ) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); + error = EINVAL; + goto fail; } - if (mhp->ext[SADB_X_EXT_SA2] != NULL) { - mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; - reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; - } else { + if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) { mode = IPSEC_MODE_ANY; reqid = 0; + } else { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + error = EINVAL; + goto fail; + } + mode = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; + reqid = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; } src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); @@ -4698,121 +4761,55 @@ key_getspi(so, m, mhp) if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", __func__)); - return key_senderror(so, m, EINVAL); - } - - /* - * Make sure the port numbers are zero. - * In case of NAT-T we will update them later if needed. - */ - switch (((struct sockaddr *)(src0 + 1))->sa_family) { - case AF_INET: - if (((struct sockaddr *)(src0 + 1))->sa_len != - sizeof(struct sockaddr_in)) - return key_senderror(so, m, EINVAL); - ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; - break; - case AF_INET6: - if (((struct sockaddr *)(src0 + 1))->sa_len != - sizeof(struct sockaddr_in6)) - return key_senderror(so, m, EINVAL); - ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; - break; - default: - ; /*???*/ + error = EINVAL; + goto fail; } - switch (((struct sockaddr *)(dst0 + 1))->sa_family) { - case AF_INET: - if (((struct sockaddr *)(dst0 + 1))->sa_len != - sizeof(struct sockaddr_in)) - return key_senderror(so, m, EINVAL); - ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; - break; - case AF_INET6: - if (((struct sockaddr *)(dst0 + 1))->sa_len != - sizeof(struct sockaddr_in6)) - return key_senderror(so, m, EINVAL); - ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; - break; - default: - ; /*???*/ + error = key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)); + if (error != 0) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); + error = EINVAL; + goto fail; } - - /* XXX boundary check against sa_len */ KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); -#ifdef IPSEC_NAT_T - /* - * Handle NAT-T info if present. - * We made sure the port numbers are zero above, so we do - * not have to worry in case we do not update them. - */ - if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) - ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); - if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) - ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); - - if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { - struct sadb_x_nat_t_type *type; - struct sadb_x_nat_t_port *sport, *dport; - - if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || - mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || - mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { - ipseclog((LOG_DEBUG, "%s: invalid nat-t message " - "passed.\n", __func__)); - return key_senderror(so, m, EINVAL); - } - - sport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_SPORT]; - dport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_DPORT]; - - if (sport) - KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); - if (dport) - KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); - } -#endif - /* SPI allocation */ - spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], - &saidx); - if (spi == 0) - return key_senderror(so, m, EINVAL); - - /* get a SA index */ - if ((newsah = key_getsah(&saidx)) == NULL) { - /* create a new SA index */ - if ((newsah = key_newsah(&saidx)) == NULL) { - ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); - return key_senderror(so, m, ENOBUFS); - } + spi = key_do_getnewspi( + (struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], &saidx); + if (spi == 0) { + /* + * Requested SPI or SPI range is not available or + * already used. + */ + error = EEXIST; + goto fail; } + sav = key_newsav(mhp, &saidx, spi, &error); + if (sav == NULL) + goto fail; - /* get a new SA */ - /* XXX rewrite */ - newsav = KEY_NEWSAV(m, mhp, newsah, &error); - if (newsav == NULL) { - /* XXX don't free new SA index allocated in above. */ - return key_senderror(so, m, error); + if (sav->seq != 0) { + /* + * RFC2367: + * If the SADB_GETSPI message is in response to a + * kernel-generated SADB_ACQUIRE, the sadb_msg_seq + * MUST be the same as the SADB_ACQUIRE message. + * + * XXXAE: However it doesn't definethe behaviour how to + * check this and what to do if it doesn't match. + * Also what we should do if it matches? + * + * We can compare saidx used in SADB_ACQUIRE with saidx + * used in SADB_GETSPI, but this probably can break + * existing software. For now just warn if it doesn't match. + * + * XXXAE: anyway it looks useless. + */ + key_acqdone(&saidx, sav->seq); } - - /* set spi */ - newsav->spi = htonl(spi); - - /* delete the entry in acqtree */ - if (mhp->msg->sadb_msg_seq != 0) { - struct secacq *acq; - if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { - /* reset counter in order to deletion by timehandler. */ - acq->created = time_second; - acq->count = 0; - } - } + KEYDBG(KEY_STAMP, + printf("%s: SA(%p)\n", __func__, sav)); + KEYDBG(KEY_DATA, kdebug_secasv(sav)); { struct mbuf *n, *nn; @@ -4824,16 +4821,17 @@ key_getspi(so, m, mhp) len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + PFKEY_ALIGN8(sizeof(struct sadb_sa)); - MGETHDR(n, M_DONTWAIT, MT_DATA); + MGETHDR(n, M_NOWAIT, MT_DATA); if (len > MHLEN) { - MCLGET(n, M_DONTWAIT); - if ((n->m_flags & M_EXT) == 0) { + if (!(MCLGET(n, M_NOWAIT))) { m_freem(n); n = NULL; } } - if (!n) - return key_senderror(so, m, ENOBUFS); + if (!n) { + error = ENOBUFS; + goto fail; + } n->m_len = len; n->m_next = NULL; @@ -4845,7 +4843,7 @@ key_getspi(so, m, mhp) m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); m_sa->sadb_sa_exttype = SADB_EXT_SA; - m_sa->sadb_sa_spi = htonl(spi); + m_sa->sadb_sa_spi = spi; /* SPI is already in network byte order */ off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); IPSEC_ASSERT(off == len, @@ -4855,7 +4853,8 @@ key_getspi(so, m, mhp) SADB_EXT_ADDRESS_DST); if (!n->m_next) { m_freem(n); - return key_senderror(so, m, ENOBUFS); + error = ENOBUFS; + goto fail; } if (n->m_len < sizeof(struct sadb_msg)) { @@ -4869,13 +4868,16 @@ key_getspi(so, m, mhp) n->m_pkthdr.len += nn->m_len; newmsg = mtod(n, struct sadb_msg *); - newmsg->sadb_msg_seq = newsav->seq; + newmsg->sadb_msg_seq = sav->seq; newmsg->sadb_msg_errno = 0; newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); m_freem(m); return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); } + +fail: + return (key_senderror(so, m, error)); } /* @@ -4883,15 +4885,12 @@ key_getspi(so, m, mhp) * called by key_getspi(). * OUT: * 0: failure. - * others: success. + * others: success, SPI in network byte order. */ -static u_int32_t -key_do_getnewspi(spirange, saidx) - struct sadb_spirange *spirange; - struct secasindex *saidx; +static uint32_t +key_do_getnewspi(struct sadb_spirange *spirange, struct secasindex *saidx) { - u_int32_t newspi; - u_int32_t min, max; + uint32_t min, max, newspi, t; int count = V_key_spi_trycnt; /* set spi range to allocate */ @@ -4904,7 +4903,6 @@ key_do_getnewspi(spirange, saidx) } /* IPCOMP needs 2-byte SPI */ if (saidx->proto == IPPROTO_IPCOMP) { - u_int32_t t; if (min >= 0x10000) min = 0xffff; if (max >= 0x10000) @@ -4915,15 +4913,14 @@ key_do_getnewspi(spirange, saidx) } if (min == max) { - if (key_checkspidup(saidx, min) != NULL) { + if (!key_checkspidup(htonl(min))) { ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", - __func__, min)); + __func__, min)); return 0; } count--; /* taking one cost. */ newspi = min; - } else { /* init SPI */ @@ -4933,23 +4930,244 @@ key_do_getnewspi(spirange, saidx) while (count--) { /* generate pseudo-random SPI value ranged. */ newspi = min + (key_random() % (max - min + 1)); - - if (key_checkspidup(saidx, newspi) == NULL) + if (!key_checkspidup(htonl(newspi))) break; } if (count == 0 || newspi == 0) { - ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", - __func__)); + ipseclog((LOG_DEBUG, + "%s: failed to allocate SPI.\n", __func__)); return 0; } } /* statistics */ keystat.getspi_count = - (keystat.getspi_count + V_key_spi_trycnt - count) / 2; + (keystat.getspi_count + V_key_spi_trycnt - count) / 2; + + return (htonl(newspi)); +} + +/* + * Find TCP-MD5 SA with corresponding secasindex. + * If not found, return NULL and fill SPI with usable value if needed. + */ +static struct secasvar * +key_getsav_tcpmd5(struct secasindex *saidx, uint32_t *spi) +{ + SAHTREE_RLOCK_TRACKER; + struct secashead *sah; + struct secasvar *sav; + + IPSEC_ASSERT(saidx->proto == IPPROTO_TCP, ("wrong proto")); + SAHTREE_RLOCK(); + LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) { + if (sah->saidx.proto != IPPROTO_TCP) + continue; + if (!key_sockaddrcmp(&saidx->dst.sa, &sah->saidx.dst.sa, 0)) + break; + } + if (sah != NULL) { + if (V_key_preferred_oldsa) + sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue); + else + sav = TAILQ_FIRST(&sah->savtree_alive); + if (sav != NULL) { + SAV_ADDREF(sav); + SAHTREE_RUNLOCK(); + return (sav); + } + } + if (spi == NULL) { + /* No SPI required */ + SAHTREE_RUNLOCK(); + return (NULL); + } + /* Check that SPI is unique */ + LIST_FOREACH(sav, SAVHASH_HASH(*spi), spihash) { + if (sav->spi == *spi) + break; + } + if (sav == NULL) { + SAHTREE_RUNLOCK(); + /* SPI is already unique */ + return (NULL); + } + SAHTREE_RUNLOCK(); + /* XXX: not optimal */ + *spi = key_do_getnewspi(NULL, saidx); + return (NULL); +} + +static int +key_updateaddresses(struct socket *so, struct mbuf *m, + const struct sadb_msghdr *mhp, struct secasvar *sav, + struct secasindex *saidx) +{ + struct sockaddr *newaddr; + struct secashead *sah; + struct secasvar *newsav, *tmp; + struct mbuf *n; + int error, isnew; + + /* Check that we need to change SAH */ + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC)) { + newaddr = (struct sockaddr *)( + ((struct sadb_address *) + mhp->ext[SADB_X_EXT_NEW_ADDRESS_SRC]) + 1); + bcopy(newaddr, &saidx->src, newaddr->sa_len); + key_porttosaddr(&saidx->src.sa, 0); + } + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST)) { + newaddr = (struct sockaddr *)( + ((struct sadb_address *) + mhp->ext[SADB_X_EXT_NEW_ADDRESS_DST]) + 1); + bcopy(newaddr, &saidx->dst, newaddr->sa_len); + key_porttosaddr(&saidx->dst.sa, 0); + } + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC) || + !SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST)) { + error = key_checksockaddrs(&saidx->src.sa, &saidx->dst.sa); + if (error != 0) { + ipseclog((LOG_DEBUG, "%s: invalid new sockaddr.\n", + __func__)); + return (error); + } + + sah = key_getsah(saidx); + if (sah == NULL) { + /* create a new SA index */ + sah = key_newsah(saidx); + if (sah == NULL) { + ipseclog((LOG_DEBUG, + "%s: No more memory.\n", __func__)); + return (ENOBUFS); + } + isnew = 2; /* SAH is new */ + } else + isnew = 1; /* existing SAH is referenced */ + } else { + /* + * src and dst addresses are still the same. + * Do we want to change NAT-T config? + */ + if (sav->sah->saidx.proto != IPPROTO_ESP || + SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) || + SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_SPORT) || + SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_DPORT)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); + return (EINVAL); + } + /* We hold reference to SA, thus SAH will be referenced too. */ + sah = sav->sah; + isnew = 0; + } + + newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, + M_NOWAIT | M_ZERO); + if (newsav == NULL) { + ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); + error = ENOBUFS; + goto fail; + } + + /* Clone SA's content into newsav */ + SAV_INITREF(newsav); + bcopy(sav, newsav, offsetof(struct secasvar, chain)); + /* + * We create new NAT-T config if it is needed. + * Old NAT-T config will be freed by key_cleansav() when + * last reference to SA will be released. + */ + newsav->natt = NULL; + newsav->sah = sah; + newsav->state = SADB_SASTATE_MATURE; + error = key_setnatt(sav, mhp); + if (error != 0) + goto fail; + + SAHTREE_WLOCK(); + /* Check that SA is still alive */ + if (sav->state == SADB_SASTATE_DEAD) { + /* SA was unlinked */ + SAHTREE_WUNLOCK(); + error = ESRCH; + goto fail; + } + + /* Unlink SA from SAH and SPI hash */ + IPSEC_ASSERT((sav->flags & SADB_X_EXT_F_CLONED) == 0, + ("SA is already cloned")); + IPSEC_ASSERT(sav->state == SADB_SASTATE_MATURE || + sav->state == SADB_SASTATE_DYING, + ("Wrong SA state %u\n", sav->state)); + TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain); + LIST_REMOVE(sav, spihash); + sav->state = SADB_SASTATE_DEAD; + + /* + * Link new SA with SAH. Keep SAs ordered by + * create time (newer are first). + */ + TAILQ_FOREACH(tmp, &sah->savtree_alive, chain) { + if (newsav->created > tmp->created) { + TAILQ_INSERT_BEFORE(tmp, newsav, chain); + break; + } + } + if (tmp == NULL) + TAILQ_INSERT_TAIL(&sah->savtree_alive, newsav, chain); + + /* Add new SA into SPI hash. */ + LIST_INSERT_HEAD(SAVHASH_HASH(newsav->spi), newsav, spihash); + + /* Add new SAH into SADB. */ + if (isnew == 2) { + TAILQ_INSERT_HEAD(&V_sahtree, sah, chain); + LIST_INSERT_HEAD(SAHADDRHASH_HASH(saidx), sah, addrhash); + sah->state = SADB_SASTATE_MATURE; + SAH_ADDREF(sah); /* newsav references new SAH */ + } + /* + * isnew == 1 -> @sah was referenced by key_getsah(). + * isnew == 0 -> we use the same @sah, that was used by @sav, + * and we use its reference for @newsav. + */ + SECASVAR_LOCK(sav); + /* XXX: replace cntr with pointer? */ + newsav->cntr = sav->cntr; + sav->flags |= SADB_X_EXT_F_CLONED; + SECASVAR_UNLOCK(sav); + + SAHTREE_WUNLOCK(); - return newspi; + KEYDBG(KEY_STAMP, + printf("%s: SA(%p) cloned into SA(%p)\n", + __func__, sav, newsav)); + KEYDBG(KEY_DATA, kdebug_secasv(newsav)); + + key_freesav(&sav); /* release last reference */ + + /* set msg buf from mhp */ + n = key_getmsgbuf_x1(m, mhp); + if (n == NULL) { + ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); + return (ENOBUFS); + } + m_freem(m); + key_sendup_mbuf(so, n, KEY_SENDUP_ALL); + return (0); +fail: + if (isnew != 0) + key_freesah(&sah); + if (newsav != NULL) { + if (newsav->natt != NULL) + free(newsav->natt, M_IPSEC_MISC); + free(newsav, M_IPSEC_SA); + } + return (error); } /* @@ -4966,26 +5184,15 @@ key_do_getnewspi(spirange, saidx) * m will always be freed. */ static int -key_update(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - struct sadb_sa *sa0; - struct sadb_address *src0, *dst0; -#ifdef IPSEC_NAT_T - struct sadb_x_nat_t_type *type; - struct sadb_x_nat_t_port *sport, *dport; - struct sadb_address *iaddr, *raddr; - struct sadb_x_nat_t_frag *frag; -#endif struct secasindex saidx; - struct secashead *sah; + struct sadb_address *src0, *dst0; + struct sadb_sa *sa0; struct secasvar *sav; - u_int16_t proto; - u_int8_t mode; - u_int32_t reqid; + uint32_t reqid; int error; + uint8_t mode, proto; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); @@ -4995,199 +5202,182 @@ key_update(so, m, mhp) /* map satype to proto */ if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", - __func__)); + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_EXT_SA] == NULL || - mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || - (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && - mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || - (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && - mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || - (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && - mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || - (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && - mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKHDR(mhp, SADB_EXT_SA) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) || + (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) && + !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) || + (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) && + !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || - mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKLEN(mhp, SADB_EXT_SA) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_X_EXT_SA2] != NULL) { - mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; - reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; - } else { + if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) { mode = IPSEC_MODE_ANY; reqid = 0; + } else { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return key_senderror(so, m, EINVAL); + } + mode = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; + reqid = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; } - /* XXX boundary checking for other extensions */ sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); - /* XXX boundary check against sa_len */ - KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); - - /* - * Make sure the port numbers are zero. - * In case of NAT-T we will update them later if needed. - */ - KEY_PORTTOSADDR(&saidx.src, 0); - KEY_PORTTOSADDR(&saidx.dst, 0); - -#ifdef IPSEC_NAT_T /* - * Handle NAT-T info if present. + * Only SADB_SASTATE_MATURE SAs may be submitted in an + * SADB_UPDATE message. */ - if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { - - if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || - mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || - mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { - ipseclog((LOG_DEBUG, "%s: invalid message.\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - - type = (struct sadb_x_nat_t_type *) - mhp->ext[SADB_X_EXT_NAT_T_TYPE]; - sport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_SPORT]; - dport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_DPORT]; - } else { - type = 0; - sport = dport = 0; - } - if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { - if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || - mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { - ipseclog((LOG_DEBUG, "%s: invalid message\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; - raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; - ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); - } else { - iaddr = raddr = NULL; - } - if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { - if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { - ipseclog((LOG_DEBUG, "%s: invalid message\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - frag = (struct sadb_x_nat_t_frag *) - mhp->ext[SADB_X_EXT_NAT_T_FRAG]; - } else { - frag = 0; - } + if (sa0->sadb_sa_state != SADB_SASTATE_MATURE) { + ipseclog((LOG_DEBUG, "%s: invalid state.\n", __func__)); +#ifdef PFKEY_STRICT_CHECKS + return key_senderror(so, m, EINVAL); #endif - - /* get a SA header */ - if ((sah = key_getsah(&saidx)) == NULL) { - ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); - return key_senderror(so, m, ENOENT); } - - /* set spidx if there */ - /* XXX rewrite */ - error = key_setident(sah, m, mhp); - if (error) + error = key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)); + if (error != 0) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); return key_senderror(so, m, error); - - /* find a SA with sequence number. */ -#ifdef IPSEC_DOSEQCHECK - if (mhp->msg->sadb_msg_seq != 0 - && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { - ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " - "exists.\n", __func__, mhp->msg->sadb_msg_seq)); - return key_senderror(so, m, ENOENT); } -#else - SAHTREE_LOCK(); - sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); - SAHTREE_UNLOCK(); + KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); + sav = key_getsavbyspi(sa0->sadb_sa_spi); if (sav == NULL) { - ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", - __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); - return key_senderror(so, m, EINVAL); - } -#endif - - /* validity check */ - if (sav->sah->saidx.proto != proto) { - ipseclog((LOG_DEBUG, "%s: protocol mismatched " - "(DB=%u param=%u)\n", __func__, - sav->sah->saidx.proto, proto)); + ipseclog((LOG_DEBUG, "%s: no SA found for SPI %u\n", + __func__, ntohl(sa0->sadb_sa_spi))); return key_senderror(so, m, EINVAL); } -#ifdef IPSEC_DOSEQCHECK - if (sav->spi != sa0->sadb_sa_spi) { - ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", - __func__, - (u_int32_t)ntohl(sav->spi), - (u_int32_t)ntohl(sa0->sadb_sa_spi))); - return key_senderror(so, m, EINVAL); - } -#endif + /* + * Check that SADB_UPDATE issued by the same process that did + * SADB_GETSPI or SADB_ADD. + */ if (sav->pid != mhp->msg->sadb_msg_pid) { - ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", - __func__, sav->pid, mhp->msg->sadb_msg_pid)); + ipseclog((LOG_DEBUG, + "%s: pid mismatched (SPI %u, pid %u vs. %u)\n", __func__, + ntohl(sav->spi), sav->pid, mhp->msg->sadb_msg_pid)); + key_freesav(&sav); return key_senderror(so, m, EINVAL); } - - /* copy sav values */ - error = key_setsaval(sav, m, mhp); - if (error) { - KEY_FREESAV(&sav); - return key_senderror(so, m, error); - } - -#ifdef IPSEC_NAT_T - /* - * Handle more NAT-T info if present, - * now that we have a sav to fill. - */ - if (type) - sav->natt_type = type->sadb_x_nat_t_type_type; - - if (sport) - KEY_PORTTOSADDR(&sav->sah->saidx.src, - sport->sadb_x_nat_t_port_port); - if (dport) - KEY_PORTTOSADDR(&sav->sah->saidx.dst, - dport->sadb_x_nat_t_port_port); - -#if 0 - /* - * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. - * We should actually check for a minimum MTU here, if we - * want to support it in ip_output. - */ - if (frag) - sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; -#endif -#endif - - /* check SA values to be mature. */ - if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { - KEY_FREESAV(&sav); - return key_senderror(so, m, 0); + /* saidx should match with SA. */ + if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_MODE_REQID) == 0) { + ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u", + __func__, ntohl(sav->spi))); + key_freesav(&sav); + return key_senderror(so, m, ESRCH); + } + + if (sav->state == SADB_SASTATE_LARVAL) { + if ((mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && + SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT)) || + (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && + SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH))) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); + key_freesav(&sav); + return key_senderror(so, m, EINVAL); + } + /* + * We can set any values except src, dst and SPI. + */ + error = key_setsaval(sav, mhp); + if (error != 0) { + key_freesav(&sav); + return (key_senderror(so, m, error)); + } + /* Change SA state to MATURE */ + SAHTREE_WLOCK(); + if (sav->state != SADB_SASTATE_LARVAL) { + /* SA was deleted or another thread made it MATURE. */ + SAHTREE_WUNLOCK(); + key_freesav(&sav); + return (key_senderror(so, m, ESRCH)); + } + /* + * NOTE: we keep SAs in savtree_alive ordered by created + * time. When SA's state changed from LARVAL to MATURE, + * we update its created time in key_setsaval() and move + * it into head of savtree_alive. + */ + TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain); + TAILQ_INSERT_HEAD(&sav->sah->savtree_alive, sav, chain); + sav->state = SADB_SASTATE_MATURE; + SAHTREE_WUNLOCK(); + } else { + /* + * For DYING and MATURE SA we can change only state + * and lifetimes. Report EINVAL if something else attempted + * to change. + */ + if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT) || + !SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH)) { + key_freesav(&sav); + return (key_senderror(so, m, EINVAL)); + } + error = key_updatelifetimes(sav, mhp); + if (error != 0) { + key_freesav(&sav); + return (key_senderror(so, m, error)); + } + /* + * This is FreeBSD extension to RFC2367. + * IKEd can specify SADB_X_EXT_NEW_ADDRESS_SRC and/or + * SADB_X_EXT_NEW_ADDRESS_DST when it wants to change + * SA addresses (for example to implement MOBIKE protocol + * as described in RFC4555). Also we allow to change + * NAT-T config. + */ + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC) || + !SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST) || + !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) || + sav->natt != NULL) { + error = key_updateaddresses(so, m, mhp, sav, &saidx); + key_freesav(&sav); + if (error != 0) + return (key_senderror(so, m, error)); + return (0); + } + /* Check that SA is still alive */ + SAHTREE_WLOCK(); + if (sav->state == SADB_SASTATE_DEAD) { + /* SA was unlinked */ + SAHTREE_WUNLOCK(); + key_freesav(&sav); + return (key_senderror(so, m, ESRCH)); + } + /* + * NOTE: there is possible state moving from DYING to MATURE, + * but this doesn't change created time, so we won't reorder + * this SA. + */ + sav->state = SADB_SASTATE_MATURE; + SAHTREE_WUNLOCK(); } + KEYDBG(KEY_STAMP, + printf("%s: SA(%p)\n", __func__, sav)); + KEYDBG(KEY_DATA, kdebug_secasv(sav)); + key_freesav(&sav); { struct mbuf *n; @@ -5205,42 +5395,6 @@ key_update(so, m, mhp) } /* - * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. - * only called by key_update(). - * OUT: - * NULL : not found - * others : found, pointer to a SA. - */ -#ifdef IPSEC_DOSEQCHECK -static struct secasvar * -key_getsavbyseq(sah, seq) - struct secashead *sah; - u_int32_t seq; -{ - struct secasvar *sav; - u_int state; - - state = SADB_SASTATE_LARVAL; - - /* search SAD with sequence number ? */ - LIST_FOREACH(sav, &sah->savtree[state], chain) { - - KEY_CHKSASTATE(state, sav->state, __func__); - - if (sav->seq == seq) { - sa_addref(sav); - KEYDEBUG(KEYDEBUG_IPSEC_STAMP, - printf("DP %s cause refcnt++:%d SA:%p\n", - __func__, sav->refcnt, sav)); - return sav; - } - } - - return NULL; -} -#endif - -/* * SADB_ADD processing * add an entry to SA database, when received * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) @@ -5256,24 +5410,14 @@ key_getsavbyseq(sah, seq) * m will always be freed. */ static int -key_add(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_add(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - struct sadb_sa *sa0; - struct sadb_address *src0, *dst0; -#ifdef IPSEC_NAT_T - struct sadb_x_nat_t_type *type; - struct sadb_address *iaddr, *raddr; - struct sadb_x_nat_t_frag *frag; -#endif struct secasindex saidx; - struct secashead *newsah; - struct secasvar *newsav; - u_int16_t proto; - u_int8_t mode; - u_int32_t reqid; + struct sadb_address *src0, *dst0; + struct sadb_sa *sa0; + struct secasvar *sav; + uint32_t reqid, spi; + uint8_t mode, proto; int error; IPSEC_ASSERT(so != NULL, ("null socket")); @@ -5284,176 +5428,115 @@ key_add(so, m, mhp) /* map satype to proto */ if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", - __func__)); + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_EXT_SA] == NULL || - mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || - (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && - mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || - (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && - mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || - (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && - mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || - (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && - mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKHDR(mhp, SADB_EXT_SA) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) || + (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && ( + SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT) || + SADB_CHECKLEN(mhp, SADB_EXT_KEY_ENCRYPT))) || + (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && ( + SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH) || + SADB_CHECKLEN(mhp, SADB_EXT_KEY_AUTH))) || + (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) && + !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) || + (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) && + !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || - mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { - /* XXX need more */ - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKLEN(mhp, SADB_EXT_SA) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_X_EXT_SA2] != NULL) { - mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; - reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; - } else { + if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) { mode = IPSEC_MODE_ANY; reqid = 0; + } else { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return key_senderror(so, m, EINVAL); + } + mode = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; + reqid = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; } sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; - /* XXX boundary check against sa_len */ - KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); - - /* - * Make sure the port numbers are zero. - * In case of NAT-T we will update them later if needed. - */ - KEY_PORTTOSADDR(&saidx.src, 0); - KEY_PORTTOSADDR(&saidx.dst, 0); - -#ifdef IPSEC_NAT_T /* - * Handle NAT-T info if present. + * Only SADB_SASTATE_MATURE SAs may be submitted in an + * SADB_ADD message. */ - if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { - struct sadb_x_nat_t_port *sport, *dport; - - if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || - mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || - mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { - ipseclog((LOG_DEBUG, "%s: invalid message.\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - - type = (struct sadb_x_nat_t_type *) - mhp->ext[SADB_X_EXT_NAT_T_TYPE]; - sport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_SPORT]; - dport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_DPORT]; - - if (sport) - KEY_PORTTOSADDR(&saidx.src, - sport->sadb_x_nat_t_port_port); - if (dport) - KEY_PORTTOSADDR(&saidx.dst, - dport->sadb_x_nat_t_port_port); - } else { - type = 0; + if (sa0->sadb_sa_state != SADB_SASTATE_MATURE) { + ipseclog((LOG_DEBUG, "%s: invalid state.\n", __func__)); +#ifdef PFKEY_STRICT_CHECKS + return key_senderror(so, m, EINVAL); +#endif } - if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { - if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || - mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { - ipseclog((LOG_DEBUG, "%s: invalid message\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; - raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; - ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); - } else { - iaddr = raddr = NULL; + error = key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)); + if (error != 0) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); + return key_senderror(so, m, error); } - if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { - if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { - ipseclog((LOG_DEBUG, "%s: invalid message\n", + KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); + spi = sa0->sadb_sa_spi; + /* + * For TCP-MD5 SAs we don't use SPI. Check the uniqueness using + * secasindex. + * XXXAE: IPComp seems also doesn't use SPI. + */ + if (proto == IPPROTO_TCP) { + sav = key_getsav_tcpmd5(&saidx, &spi); + if (sav == NULL && spi == 0) { + /* Failed to allocate SPI */ + ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); - return key_senderror(so, m, EINVAL); + return key_senderror(so, m, EEXIST); } - frag = (struct sadb_x_nat_t_frag *) - mhp->ext[SADB_X_EXT_NAT_T_FRAG]; + /* XXX: SPI that we report back can have another value */ } else { - frag = 0; + /* We can create new SA only if SPI is different. */ + sav = key_getsavbyspi(spi); } -#endif - - /* get a SA header */ - if ((newsah = key_getsah(&saidx)) == NULL) { - /* create a new SA header */ - if ((newsah = key_newsah(&saidx)) == NULL) { - ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); - return key_senderror(so, m, ENOBUFS); - } - } - - /* set spidx if there */ - /* XXX rewrite */ - error = key_setident(newsah, m, mhp); - if (error) { - return key_senderror(so, m, error); - } - - /* create new SA entry. */ - /* We can create new SA only if SPI is differenct. */ - SAHTREE_LOCK(); - newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); - SAHTREE_UNLOCK(); - if (newsav != NULL) { + if (sav != NULL) { + key_freesav(&sav); ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); return key_senderror(so, m, EEXIST); } - newsav = KEY_NEWSAV(m, mhp, newsah, &error); - if (newsav == NULL) { - return key_senderror(so, m, error); - } -#ifdef IPSEC_NAT_T - /* - * Handle more NAT-T info if present, - * now that we have a sav to fill. - */ - if (type) - newsav->natt_type = type->sadb_x_nat_t_type_type; - -#if 0 - /* - * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. - * We should actually check for a minimum MTU here, if we - * want to support it in ip_output. - */ - if (frag) - newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; -#endif -#endif - - /* check SA values to be mature. */ - if ((error = key_mature(newsav)) != 0) { - KEY_FREESAV(&newsav); + sav = key_newsav(mhp, &saidx, spi, &error); + if (sav == NULL) return key_senderror(so, m, error); - } - + KEYDBG(KEY_STAMP, + printf("%s: return SA(%p)\n", __func__, sav)); + KEYDBG(KEY_DATA, kdebug_secasv(sav)); /* - * don't call key_freesav() here, as we would like to keep the SA - * in the database on success. + * If SADB_ADD was in response to SADB_ACQUIRE, we need to schedule + * ACQ for deletion. */ + if (sav->seq != 0) + key_acqdone(&saidx, sav->seq); { + /* + * Don't call key_freesav() on error here, as we would like to + * keep the SA in the database. + */ struct mbuf *n; /* set msg buf from mhp */ @@ -5468,33 +5551,199 @@ key_add(so, m, mhp) } } -/* m is retained */ +/* + * NAT-T support. + * IKEd may request the use ESP in UDP encapsulation when it detects the + * presence of NAT. It uses NAT-T extension headers for such SAs to specify + * parameters needed for encapsulation and decapsulation. These PF_KEY + * extension headers are not standardized, so this comment addresses our + * implementation. + * SADB_X_EXT_NAT_T_TYPE specifies type of encapsulation, we support only + * UDP_ENCAP_ESPINUDP as described in RFC3948. + * SADB_X_EXT_NAT_T_SPORT/DPORT specifies source and destination ports for + * UDP header. We use these ports in UDP encapsulation procedure, also we + * can check them in UDP decapsulation procedure. + * SADB_X_EXT_NAT_T_OA[IR] specifies original address of initiator or + * responder. These addresses can be used for transport mode to adjust + * checksum after decapsulation and decryption. Since original IP addresses + * used by peer usually different (we detected presence of NAT), TCP/UDP + * pseudo header checksum and IP header checksum was calculated using original + * addresses. After decapsulation and decryption we need to adjust checksum + * to have correct datagram. + * + * We expect presence of NAT-T extension headers only in SADB_ADD and + * SADB_UPDATE messages. We report NAT-T extension headers in replies + * to SADB_ADD, SADB_UPDATE, SADB_GET, and SADB_DUMP messages. + */ static int -key_setident(sah, m, mhp) - struct secashead *sah; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_setnatt(struct secasvar *sav, const struct sadb_msghdr *mhp) +{ + struct sadb_x_nat_t_port *port; + struct sadb_x_nat_t_type *type; + struct sadb_address *oai, *oar; + struct sockaddr *sa; + uint32_t addr; + uint16_t cksum; + + IPSEC_ASSERT(sav->natt == NULL, ("natt is already initialized")); + /* + * Ignore NAT-T headers if sproto isn't ESP. + */ + if (sav->sah->saidx.proto != IPPROTO_ESP) + return (0); + + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) && + !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_SPORT) && + !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_DPORT)) { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_TYPE) || + SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_SPORT) || + SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_DPORT)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return (EINVAL); + } + } else + return (0); + + type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; + if (type->sadb_x_nat_t_type_type != UDP_ENCAP_ESPINUDP) { + ipseclog((LOG_DEBUG, "%s: unsupported NAT-T type %u.\n", + __func__, type->sadb_x_nat_t_type_type)); + return (EINVAL); + } + /* + * Allocate storage for NAT-T config. + * On error it will be released by key_cleansav(). + */ + sav->natt = malloc(sizeof(struct secnatt), M_IPSEC_MISC, + M_NOWAIT | M_ZERO); + if (sav->natt == NULL) { + PFKEYSTAT_INC(in_nomem); + ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); + return (ENOBUFS); + } + port = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; + if (port->sadb_x_nat_t_port_port == 0) { + ipseclog((LOG_DEBUG, "%s: invalid NAT-T sport specified.\n", + __func__)); + return (EINVAL); + } + sav->natt->sport = port->sadb_x_nat_t_port_port; + port = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; + if (port->sadb_x_nat_t_port_port == 0) { + ipseclog((LOG_DEBUG, "%s: invalid NAT-T dport specified.\n", + __func__)); + return (EINVAL); + } + sav->natt->dport = port->sadb_x_nat_t_port_port; + + /* + * SADB_X_EXT_NAT_T_OAI and SADB_X_EXT_NAT_T_OAR are optional + * and needed only for transport mode IPsec. + * Usually NAT translates only one address, but it is possible, + * that both addresses could be translated. + * NOTE: Value of SADB_X_EXT_NAT_T_OAI is equal to SADB_X_EXT_NAT_T_OA. + */ + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAI)) { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAI)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return (EINVAL); + } + oai = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; + } else + oai = NULL; + if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAR)) { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAR)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", + __func__)); + return (EINVAL); + } + oar = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; + } else + oar = NULL; + + /* Initialize addresses only for transport mode */ + if (sav->sah->saidx.mode != IPSEC_MODE_TUNNEL) { + cksum = 0; + if (oai != NULL) { + /* Currently we support only AF_INET */ + sa = (struct sockaddr *)(oai + 1); + if (sa->sa_family != AF_INET || + sa->sa_len != sizeof(struct sockaddr_in)) { + ipseclog((LOG_DEBUG, + "%s: wrong NAT-OAi header.\n", + __func__)); + return (EINVAL); + } + /* Ignore address if it the same */ + if (((struct sockaddr_in *)sa)->sin_addr.s_addr != + sav->sah->saidx.src.sin.sin_addr.s_addr) { + bcopy(sa, &sav->natt->oai.sa, sa->sa_len); + sav->natt->flags |= IPSEC_NATT_F_OAI; + /* Calculate checksum delta */ + addr = sav->sah->saidx.src.sin.sin_addr.s_addr; + cksum = in_addword(cksum, ~addr >> 16); + cksum = in_addword(cksum, ~addr & 0xffff); + addr = sav->natt->oai.sin.sin_addr.s_addr; + cksum = in_addword(cksum, addr >> 16); + cksum = in_addword(cksum, addr & 0xffff); + } + } + if (oar != NULL) { + /* Currently we support only AF_INET */ + sa = (struct sockaddr *)(oar + 1); + if (sa->sa_family != AF_INET || + sa->sa_len != sizeof(struct sockaddr_in)) { + ipseclog((LOG_DEBUG, + "%s: wrong NAT-OAr header.\n", + __func__)); + return (EINVAL); + } + /* Ignore address if it the same */ + if (((struct sockaddr_in *)sa)->sin_addr.s_addr != + sav->sah->saidx.dst.sin.sin_addr.s_addr) { + bcopy(sa, &sav->natt->oar.sa, sa->sa_len); + sav->natt->flags |= IPSEC_NATT_F_OAR; + /* Calculate checksum delta */ + addr = sav->sah->saidx.dst.sin.sin_addr.s_addr; + cksum = in_addword(cksum, ~addr >> 16); + cksum = in_addword(cksum, ~addr & 0xffff); + addr = sav->natt->oar.sin.sin_addr.s_addr; + cksum = in_addword(cksum, addr >> 16); + cksum = in_addword(cksum, addr & 0xffff); + } + } + sav->natt->cksum = cksum; + } + return (0); +} + +static int +key_setident(struct secashead *sah, const struct sadb_msghdr *mhp) { const struct sadb_ident *idsrc, *iddst; int idsrclen, iddstlen; IPSEC_ASSERT(sah != NULL, ("null secashead")); - IPSEC_ASSERT(m != NULL, ("null mbuf")); IPSEC_ASSERT(mhp != NULL, ("null msghdr")); IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); /* don't make buffer if not there */ - if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && - mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { + if (SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_SRC) && + SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_DST)) { sah->idents = NULL; sah->identd = NULL; - return 0; + return (0); } - - if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || - mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { + + if (SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_DST)) { ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); - return EINVAL; + return (EINVAL); } idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; @@ -5543,12 +5792,13 @@ key_setident(sah, m, mhp) /* * m will not be freed on return. - * it is caller's responsibility to free the result. + * it is caller's responsibility to free the result. + * + * Called from SADB_ADD and SADB_UPDATE. Reply will contain headers + * from the request in defined order. */ static struct mbuf * -key_getmsgbuf_x1(m, mhp) - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) { struct mbuf *n; @@ -5557,11 +5807,15 @@ key_getmsgbuf_x1(m, mhp) IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); /* create new sadb_msg to reply. */ - n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, + n = key_gather_mbuf(m, mhp, 1, 16, SADB_EXT_RESERVED, SADB_EXT_SA, SADB_X_EXT_SA2, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, - SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); + SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, + SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, + SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, + SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NEW_ADDRESS_SRC, + SADB_X_EXT_NEW_ADDRESS_DST); if (!n) return NULL; @@ -5577,9 +5831,6 @@ key_getmsgbuf_x1(m, mhp) return n; } -static int key_delete_all __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *, u_int16_t)); - /* * SADB_DELETE processing * receive @@ -5592,17 +5843,13 @@ static int key_delete_all __P((struct socket *, struct mbuf *, * m will always be freed. */ static int -key_delete(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_delete(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - struct sadb_sa *sa0; - struct sadb_address *src0, *dst0; struct secasindex saidx; - struct secashead *sah; - struct secasvar *sav = NULL; - u_int16_t proto; + struct sadb_address *src0, *dst0; + struct secasvar *sav; + struct sadb_sa *sa0; + uint8_t proto; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); @@ -5612,110 +5859,70 @@ key_delete(so, m, mhp) /* map satype to proto */ if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", - __func__)); + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { + if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) { ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); - return key_senderror(so, m, EINVAL); - } + src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); + dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); - if (mhp->ext[SADB_EXT_SA] == NULL) { + if (key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)) != 0) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); + return (key_senderror(so, m, EINVAL)); + } + KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); + if (SADB_CHECKHDR(mhp, SADB_EXT_SA)) { /* * Caller wants us to delete all non-LARVAL SAs * that match the src/dst. This is used during * IKE INITIAL-CONTACT. + * XXXAE: this looks like some extension to RFC2367. */ ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); - return key_delete_all(so, m, mhp, proto); - } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); - return key_senderror(so, m, EINVAL); + return (key_delete_all(so, m, mhp, &saidx)); } - - sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; - src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); - - /* XXX boundary check against sa_len */ - KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); - - /* - * Make sure the port numbers are zero. - * In case of NAT-T we will update them later if needed. - */ - KEY_PORTTOSADDR(&saidx.src, 0); - KEY_PORTTOSADDR(&saidx.dst, 0); - -#ifdef IPSEC_NAT_T - /* - * Handle NAT-T info if present. - */ - if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { - struct sadb_x_nat_t_port *sport, *dport; - - if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || - mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { - ipseclog((LOG_DEBUG, "%s: invalid message.\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - - sport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_SPORT]; - dport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_DPORT]; - - if (sport) - KEY_PORTTOSADDR(&saidx.src, - sport->sadb_x_nat_t_port_port); - if (dport) - KEY_PORTTOSADDR(&saidx.dst, - dport->sadb_x_nat_t_port_port); - } -#endif - - /* get a SA header */ - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (sah->state == SADB_SASTATE_DEAD) - continue; - if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) - continue; - - /* get a SA with SPI. */ - sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); - if (sav) - break; - } - if (sah == NULL) { - SAHTREE_UNLOCK(); - ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); - return key_senderror(so, m, ENOENT); + if (SADB_CHECKLEN(mhp, SADB_EXT_SA)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); + return (key_senderror(so, m, EINVAL)); } - - key_sa_chgstate(sav, SADB_SASTATE_DEAD); - KEY_FREESAV(&sav); - SAHTREE_UNLOCK(); + sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; + if (proto == IPPROTO_TCP) + sav = key_getsav_tcpmd5(&saidx, NULL); + else + sav = key_getsavbyspi(sa0->sadb_sa_spi); + if (sav == NULL) { + ipseclog((LOG_DEBUG, "%s: no SA found for SPI %u.\n", + __func__, ntohl(sa0->sadb_sa_spi))); + return (key_senderror(so, m, ESRCH)); + } + if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_HEAD) == 0) { + ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u.\n", + __func__, ntohl(sav->spi))); + key_freesav(&sav); + return (key_senderror(so, m, ESRCH)); + } + KEYDBG(KEY_STAMP, + printf("%s: SA(%p)\n", __func__, sav)); + KEYDBG(KEY_DATA, kdebug_secasv(sav)); + key_unlinksav(sav); + key_freesav(&sav); { struct mbuf *n; struct sadb_msg *newmsg; /* create new sadb_msg to reply. */ - /* XXX-BZ NAT-T extensions? */ n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); if (!n) @@ -5739,95 +5946,44 @@ key_delete(so, m, mhp) * delete all SAs for src/dst. Called from key_delete(). */ static int -key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, - u_int16_t proto) +key_delete_all(struct socket *so, struct mbuf *m, + const struct sadb_msghdr *mhp, struct secasindex *saidx) { - struct sadb_address *src0, *dst0; - struct secasindex saidx; + struct secasvar_queue drainq; struct secashead *sah; struct secasvar *sav, *nextsav; - u_int stateidx, state; - - src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); - dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); - - /* XXX boundary check against sa_len */ - KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); - /* - * Make sure the port numbers are zero. - * In case of NAT-T we will update them later if needed. - */ - KEY_PORTTOSADDR(&saidx.src, 0); - KEY_PORTTOSADDR(&saidx.dst, 0); - -#ifdef IPSEC_NAT_T - /* - * Handle NAT-T info if present. - */ - - if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { - struct sadb_x_nat_t_port *sport, *dport; - - if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || - mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { - ipseclog((LOG_DEBUG, "%s: invalid message.\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - - sport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_SPORT]; - dport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_DPORT]; - - if (sport) - KEY_PORTTOSADDR(&saidx.src, - sport->sadb_x_nat_t_port_port); - if (dport) - KEY_PORTTOSADDR(&saidx.dst, - dport->sadb_x_nat_t_port_port); - } -#endif - - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (sah->state == SADB_SASTATE_DEAD) - continue; - if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) + TAILQ_INIT(&drainq); + SAHTREE_WLOCK(); + LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) { + if (key_cmpsaidx(&sah->saidx, saidx, CMP_HEAD) == 0) continue; - - /* Delete all non-LARVAL SAs. */ - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_alive); - stateidx++) { - state = saorder_state_alive[stateidx]; - if (state == SADB_SASTATE_LARVAL) - continue; - for (sav = LIST_FIRST(&sah->savtree[state]); - sav != NULL; sav = nextsav) { - nextsav = LIST_NEXT(sav, chain); - /* sanity check */ - if (sav->state != state) { - ipseclog((LOG_DEBUG, "%s: invalid " - "sav->state (queue %d SA %d)\n", - __func__, state, sav->state)); - continue; - } - - key_sa_chgstate(sav, SADB_SASTATE_DEAD); - KEY_FREESAV(&sav); - } - } + /* Move all ALIVE SAs into drainq */ + TAILQ_CONCAT(&drainq, &sah->savtree_alive, chain); + } + /* Unlink all queued SAs from SPI hash */ + TAILQ_FOREACH(sav, &drainq, chain) { + sav->state = SADB_SASTATE_DEAD; + LIST_REMOVE(sav, spihash); + } + SAHTREE_WUNLOCK(); + /* Now we can release reference for all SAs in drainq */ + sav = TAILQ_FIRST(&drainq); + while (sav != NULL) { + KEYDBG(KEY_STAMP, + printf("%s: SA(%p)\n", __func__, sav)); + KEYDBG(KEY_DATA, kdebug_secasv(sav)); + nextsav = TAILQ_NEXT(sav, chain); + key_freesah(&sav->sah); /* release reference from SAV */ + key_freesav(&sav); /* release last reference */ + sav = nextsav; } - SAHTREE_UNLOCK(); + { struct mbuf *n; struct sadb_msg *newmsg; /* create new sadb_msg to reply. */ - /* XXX-BZ NAT-T extensions? */ n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); if (!n) @@ -5848,6 +6004,52 @@ key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, } /* + * Delete all alive SAs for corresponding xform. + * Larval SAs have not initialized tdb_xform, so it is safe to leave them + * here when xform disappears. + */ +static void +key_delete_xform(const struct xformsw *xsp) +{ + struct secasvar_queue drainq; + struct secashead *sah; + struct secasvar *sav, *nextsav; + + TAILQ_INIT(&drainq); + SAHTREE_WLOCK(); + TAILQ_FOREACH(sah, &V_sahtree, chain) { + sav = TAILQ_FIRST(&sah->savtree_alive); + if (sav == NULL) + continue; + if (sav->tdb_xform != xsp) + continue; + /* + * It is supposed that all SAs in the chain are related to + * one xform. + */ + TAILQ_CONCAT(&drainq, &sah->savtree_alive, chain); + } + /* Unlink all queued SAs from SPI hash */ + TAILQ_FOREACH(sav, &drainq, chain) { + sav->state = SADB_SASTATE_DEAD; + LIST_REMOVE(sav, spihash); + } + SAHTREE_WUNLOCK(); + + /* Now we can release reference for all SAs in drainq */ + sav = TAILQ_FIRST(&drainq); + while (sav != NULL) { + KEYDBG(KEY_STAMP, + printf("%s: SA(%p)\n", __func__, sav)); + KEYDBG(KEY_DATA, kdebug_secasv(sav)); + nextsav = TAILQ_NEXT(sav, chain); + key_freesah(&sav->sah); /* release reference from SAV */ + key_freesav(&sav); /* release last reference */ + sav = nextsav; + } +} + +/* * SADB_GET processing * receive * <base, SA(*), address(SD)> @@ -5860,17 +6062,13 @@ key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, * m will always be freed. */ static int -key_get(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - struct sadb_sa *sa0; - struct sadb_address *src0, *dst0; struct secasindex saidx; - struct secashead *sah; - struct secasvar *sav = NULL; - u_int16_t proto; + struct sadb_address *src0, *dst0; + struct sadb_sa *sa0; + struct secasvar *sav; + uint8_t proto; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); @@ -5884,18 +6082,19 @@ key_get(so, m, mhp) return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_EXT_SA] == NULL || - mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKHDR(mhp, SADB_EXT_SA) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || - mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKLEN(mhp, SADB_EXT_SA) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); return key_senderror(so, m, EINVAL); } @@ -5903,79 +6102,45 @@ key_get(so, m, mhp) src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; - /* XXX boundary check against sa_len */ - KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); - - /* - * Make sure the port numbers are zero. - * In case of NAT-T we will update them later if needed. - */ - KEY_PORTTOSADDR(&saidx.src, 0); - KEY_PORTTOSADDR(&saidx.dst, 0); - -#ifdef IPSEC_NAT_T - /* - * Handle NAT-T info if present. - */ - - if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { - struct sadb_x_nat_t_port *sport, *dport; - - if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || - mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { - ipseclog((LOG_DEBUG, "%s: invalid message.\n", - __func__)); - return key_senderror(so, m, EINVAL); - } - - sport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_SPORT]; - dport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_DPORT]; - - if (sport) - KEY_PORTTOSADDR(&saidx.src, - sport->sadb_x_nat_t_port_port); - if (dport) - KEY_PORTTOSADDR(&saidx.dst, - dport->sadb_x_nat_t_port_port); + if (key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)) != 0) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); + return key_senderror(so, m, EINVAL); } -#endif - - /* get a SA header */ - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (sah->state == SADB_SASTATE_DEAD) - continue; - if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) - continue; + KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); - /* get a SA with SPI. */ - sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); - if (sav) - break; - } - SAHTREE_UNLOCK(); - if (sah == NULL) { + if (proto == IPPROTO_TCP) + sav = key_getsav_tcpmd5(&saidx, NULL); + else + sav = key_getsavbyspi(sa0->sadb_sa_spi); + if (sav == NULL) { ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); - return key_senderror(so, m, ENOENT); + return key_senderror(so, m, ESRCH); + } + if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_HEAD) == 0) { + ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u.\n", + __func__, ntohl(sa0->sadb_sa_spi))); + key_freesav(&sav); + return (key_senderror(so, m, ESRCH)); } { struct mbuf *n; - u_int8_t satype; + uint8_t satype; /* map proto to satype */ - if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { + if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) { ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", - __func__)); + __func__)); + key_freesav(&sav); return key_senderror(so, m, EINVAL); } /* create new sadb_msg to reply. */ n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, mhp->msg->sadb_msg_pid); + + key_freesav(&sav); if (!n) return key_senderror(so, m, ENOBUFS); @@ -5986,8 +6151,7 @@ key_get(so, m, mhp) /* XXX make it sysctl-configurable? */ static void -key_getcomb_setlifetime(comb) - struct sadb_comb *comb; +key_getcomb_setlifetime(struct sadb_comb *comb) { comb->sadb_comb_soft_allocations = 1; @@ -6005,10 +6169,10 @@ key_getcomb_setlifetime(comb) * XXX no idea if the user wants ESP authentication or not */ static struct mbuf * -key_getcomb_esp() +key_getcomb_ealg(void) { struct sadb_comb *comb; - struct enc_xform *algo; + const struct enc_xform *algo; struct mbuf *result = NULL, *m, *n; int encmin; int i, off, o; @@ -6017,7 +6181,7 @@ key_getcomb_esp() m = NULL; for (i = 1; i <= SADB_EALG_MAX; i++) { - algo = esp_algorithm_lookup(i); + algo = enc_algorithm_lookup(i); if (algo == NULL) continue; @@ -6034,7 +6198,7 @@ key_getcomb_esp() else { IPSEC_ASSERT(l <= MLEN, ("l=%u > MLEN=%lu", l, (u_long) MLEN)); - MGET(m, M_DONTWAIT, MT_DATA); + MGET(m, M_NOWAIT, MT_DATA); if (m) { M_ALIGN(m, l); m->m_len = l; @@ -6079,11 +6243,8 @@ key_getcomb_esp() } static void -key_getsizes_ah( - const struct auth_hash *ah, - int alg, - u_int16_t* min, - u_int16_t* max) +key_getsizes_ah(const struct auth_hash *ah, int alg, u_int16_t* min, + u_int16_t* max) { *min = *max = ah->keysize; @@ -6113,8 +6274,8 @@ key_getsizes_ah( static struct mbuf * key_getcomb_ah() { + const struct auth_hash *algo; struct sadb_comb *comb; - struct auth_hash *algo; struct mbuf *m; u_int16_t minkeysize, maxkeysize; int i; @@ -6131,7 +6292,7 @@ key_getcomb_ah() i != SADB_X_AALG_SHA2_512) continue; #endif - algo = ah_algorithm_lookup(i); + algo = auth_algorithm_lookup(i); if (!algo) continue; key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); @@ -6142,14 +6303,14 @@ key_getcomb_ah() if (!m) { IPSEC_ASSERT(l <= MLEN, ("l=%u > MLEN=%lu", l, (u_long) MLEN)); - MGET(m, M_DONTWAIT, MT_DATA); + MGET(m, M_NOWAIT, MT_DATA); if (m) { M_ALIGN(m, l); m->m_len = l; m->m_next = NULL; } } else - M_PREPEND(m, l, M_DONTWAIT); + M_PREPEND(m, l, M_NOWAIT); if (!m) return NULL; @@ -6171,29 +6332,29 @@ key_getcomb_ah() static struct mbuf * key_getcomb_ipcomp() { + const struct comp_algo *algo; struct sadb_comb *comb; - struct comp_algo *algo; struct mbuf *m; int i; const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); m = NULL; for (i = 1; i <= SADB_X_CALG_MAX; i++) { - algo = ipcomp_algorithm_lookup(i); + algo = comp_algorithm_lookup(i); if (!algo) continue; if (!m) { IPSEC_ASSERT(l <= MLEN, ("l=%u > MLEN=%lu", l, (u_long) MLEN)); - MGET(m, M_DONTWAIT, MT_DATA); + MGET(m, M_NOWAIT, MT_DATA); if (m) { M_ALIGN(m, l); m->m_len = l; m->m_next = NULL; } } else - M_PREPEND(m, l, M_DONTWAIT); + M_PREPEND(m, l, M_NOWAIT); if (!m) return NULL; @@ -6213,8 +6374,7 @@ key_getcomb_ipcomp() * XXX sysctl interface to ipsec_{ah,esp}_keymin */ static struct mbuf * -key_getprop(saidx) - const struct secasindex *saidx; +key_getprop(const struct secasindex *saidx) { struct sadb_prop *prop; struct mbuf *m, *n; @@ -6223,7 +6383,7 @@ key_getprop(saidx) switch (saidx->proto) { case IPPROTO_ESP: - m = key_getcomb_esp(); + m = key_getcomb_ealg(); break; case IPPROTO_AH: m = key_getcomb_ah(); @@ -6237,7 +6397,7 @@ key_getprop(saidx) if (!m) return NULL; - M_PREPEND(m, l, M_DONTWAIT); + M_PREPEND(m, l, M_NOWAIT); if (!m) return NULL; @@ -6260,7 +6420,7 @@ key_getprop(saidx) * <base, SA, address(SD), (address(P)), x_policy, * (identity(SD),) (sensitivity,) proposal> * to KMD, and expect to receive - * <base> with SADB_ACQUIRE if error occured, + * <base> with SADB_ACQUIRE if error occurred, * or * <base, src address, dst address, (SPI range)> with SADB_GETSPI * from KMD by PF_KEY. @@ -6277,40 +6437,26 @@ key_getprop(saidx) static int key_acquire(const struct secasindex *saidx, struct secpolicy *sp) { - struct mbuf *result = NULL, *m; - struct secacq *newacq; - u_int8_t satype; - int error = -1; - u_int32_t seq; + union sockaddr_union addr; + struct mbuf *result, *m; + uint32_t seq; + int error; + uint16_t ul_proto; + uint8_t mask, satype; IPSEC_ASSERT(saidx != NULL, ("null saidx")); satype = key_proto2satype(saidx->proto); IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); - /* - * We never do anything about acquirng SA. There is anather - * solution that kernel blocks to send SADB_ACQUIRE message until - * getting something message from IKEd. In later case, to be - * managed with ACQUIRING list. - */ - /* Get an entry to check whether sending message or not. */ - if ((newacq = key_getacq(saidx)) != NULL) { - if (V_key_blockacq_count < newacq->count) { - /* reset counter and do send message. */ - newacq->count = 0; - } else { - /* increment counter and do nothing. */ - newacq->count++; - return 0; - } - } else { - /* make new entry for blocking to send SADB_ACQUIRE. */ - if ((newacq = key_newacq(saidx)) == NULL) - return ENOBUFS; - } + error = -1; + result = NULL; + ul_proto = IPSEC_ULPROTO_ANY; + /* Get seq number to check whether sending message or not. */ + seq = key_getacq(saidx, &error); + if (seq == 0) + return (error); - seq = newacq->seq; m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); if (!m) { error = ENOBUFS; @@ -6319,21 +6465,69 @@ key_acquire(const struct secasindex *saidx, struct secpolicy *sp) result = m; /* - * No SADB_X_EXT_NAT_T_* here: we do not know - * anything related to NAT-T at this time. + * set sadb_address for saidx's. + * + * Note that if sp is supplied, then we're being called from + * key_allocsa_policy() and should supply port and protocol + * information. + * XXXAE: why only TCP and UDP? ICMP and SCTP looks applicable too. + * XXXAE: probably we can handle this in the ipsec[46]_allocsa(). + * XXXAE: it looks like we should save this info in the ACQ entry. */ - - /* set sadb_address for saidx's. */ - m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, - &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); + if (sp != NULL && (sp->spidx.ul_proto == IPPROTO_TCP || + sp->spidx.ul_proto == IPPROTO_UDP)) + ul_proto = sp->spidx.ul_proto; + + addr = saidx->src; + mask = FULLMASK; + if (ul_proto != IPSEC_ULPROTO_ANY) { + switch (sp->spidx.src.sa.sa_family) { + case AF_INET: + if (sp->spidx.src.sin.sin_port != IPSEC_PORT_ANY) { + addr.sin.sin_port = sp->spidx.src.sin.sin_port; + mask = sp->spidx.prefs; + } + break; + case AF_INET6: + if (sp->spidx.src.sin6.sin6_port != IPSEC_PORT_ANY) { + addr.sin6.sin6_port = + sp->spidx.src.sin6.sin6_port; + mask = sp->spidx.prefs; + } + break; + default: + break; + } + } + m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &addr.sa, mask, ul_proto); if (!m) { error = ENOBUFS; goto fail; } m_cat(result, m); - m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, - &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); + addr = saidx->dst; + mask = FULLMASK; + if (ul_proto != IPSEC_ULPROTO_ANY) { + switch (sp->spidx.dst.sa.sa_family) { + case AF_INET: + if (sp->spidx.dst.sin.sin_port != IPSEC_PORT_ANY) { + addr.sin.sin_port = sp->spidx.dst.sin.sin_port; + mask = sp->spidx.prefd; + } + break; + case AF_INET6: + if (sp->spidx.dst.sin6.sin6_port != IPSEC_PORT_ANY) { + addr.sin6.sin6_port = + sp->spidx.dst.sin6.sin6_port; + mask = sp->spidx.prefd; + } + break; + default: + break; + } + } + m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &addr.sa, mask, ul_proto); if (!m) { error = ENOBUFS; goto fail; @@ -6343,8 +6537,9 @@ key_acquire(const struct secasindex *saidx, struct secpolicy *sp) /* XXX proxy address (optional) */ /* set sadb_x_policy */ - if (sp) { - m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); + if (sp != NULL) { + m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id, + sp->priority); if (!m) { error = ENOBUFS; goto fail; @@ -6436,6 +6631,10 @@ key_acquire(const struct secasindex *saidx, struct secpolicy *sp) mtod(result, struct sadb_msg *)->sadb_msg_len = PFKEY_UNIT64(result->m_pkthdr.len); + KEYDBG(KEY_STAMP, + printf("%s: SP(%p)\n", __func__, sp)); + KEYDBG(KEY_DATA, kdebug_secasindex(saidx, NULL)); + return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); fail: @@ -6444,66 +6643,126 @@ key_acquire(const struct secasindex *saidx, struct secpolicy *sp) return error; } -static struct secacq * -key_newacq(const struct secasindex *saidx) +static uint32_t +key_newacq(const struct secasindex *saidx, int *perror) { - struct secacq *newacq; + struct secacq *acq; + uint32_t seq; - /* get new entry */ - newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); - if (newacq == NULL) { + acq = malloc(sizeof(*acq), M_IPSEC_SAQ, M_NOWAIT | M_ZERO); + if (acq == NULL) { ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); - return NULL; + *perror = ENOBUFS; + return (0); } /* copy secindex */ - bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); - newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); - newacq->created = time_second; - newacq->count = 0; + bcopy(saidx, &acq->saidx, sizeof(acq->saidx)); + acq->created = time_second; + acq->count = 0; /* add to acqtree */ ACQ_LOCK(); - LIST_INSERT_HEAD(&V_acqtree, newacq, chain); + seq = acq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); + LIST_INSERT_HEAD(&V_acqtree, acq, chain); + LIST_INSERT_HEAD(ACQADDRHASH_HASH(saidx), acq, addrhash); + LIST_INSERT_HEAD(ACQSEQHASH_HASH(seq), acq, seqhash); ACQ_UNLOCK(); - - return newacq; + *perror = 0; + return (seq); } -static struct secacq * -key_getacq(const struct secasindex *saidx) +static uint32_t +key_getacq(const struct secasindex *saidx, int *perror) { struct secacq *acq; + uint32_t seq; ACQ_LOCK(); - LIST_FOREACH(acq, &V_acqtree, chain) { - if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) + LIST_FOREACH(acq, ACQADDRHASH_HASH(saidx), addrhash) { + if (key_cmpsaidx(&acq->saidx, saidx, CMP_EXACTLY)) { + if (acq->count > V_key_blockacq_count) { + /* + * Reset counter and send message. + * Also reset created time to keep ACQ for + * this saidx. + */ + acq->created = time_second; + acq->count = 0; + seq = acq->seq; + } else { + /* + * Increment counter and do nothing. + * We send SADB_ACQUIRE message only + * for each V_key_blockacq_count packet. + */ + acq->count++; + seq = 0; + } break; + } } ACQ_UNLOCK(); - - return acq; + if (acq != NULL) { + *perror = 0; + return (seq); + } + /* allocate new entry */ + return (key_newacq(saidx, perror)); } -static struct secacq * -key_getacqbyseq(seq) - u_int32_t seq; +static int +key_acqreset(uint32_t seq) { struct secacq *acq; ACQ_LOCK(); - LIST_FOREACH(acq, &V_acqtree, chain) { - if (acq->seq == seq) + LIST_FOREACH(acq, ACQSEQHASH_HASH(seq), seqhash) { + if (acq->seq == seq) { + acq->count = 0; + acq->created = time_second; break; + } } ACQ_UNLOCK(); + if (acq == NULL) + return (ESRCH); + return (0); +} +/* + * Mark ACQ entry as stale to remove it in key_flush_acq(). + * Called after successful SADB_GETSPI message. + */ +static int +key_acqdone(const struct secasindex *saidx, uint32_t seq) +{ + struct secacq *acq; - return acq; + ACQ_LOCK(); + LIST_FOREACH(acq, ACQSEQHASH_HASH(seq), seqhash) { + if (acq->seq == seq) + break; + } + if (acq != NULL) { + if (key_cmpsaidx(&acq->saidx, saidx, CMP_EXACTLY) == 0) { + ipseclog((LOG_DEBUG, + "%s: Mismatched saidx for ACQ %u", __func__, seq)); + acq = NULL; + } else { + acq->created = 0; + } + } else { + ipseclog((LOG_DEBUG, + "%s: ACQ %u is not found.", __func__, seq)); + } + ACQ_UNLOCK(); + if (acq == NULL) + return (ESRCH); + return (0); } static struct secspacq * -key_newspacq(spidx) - struct secpolicyindex *spidx; +key_newspacq(struct secpolicyindex *spidx) { struct secspacq *acq; @@ -6528,8 +6787,7 @@ key_newspacq(spidx) } static struct secspacq * -key_getspacq(spidx) - struct secpolicyindex *spidx; +key_getspacq(struct secpolicyindex *spidx) { struct secspacq *acq; @@ -6560,16 +6818,15 @@ key_getspacq(spidx) * m will always be freed. */ static int -key_acquire2(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_acquire2(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - const struct sadb_address *src0, *dst0; + SAHTREE_RLOCK_TRACKER; + struct sadb_address *src0, *dst0; struct secasindex saidx; struct secashead *sah; - u_int16_t proto; + uint32_t reqid; int error; + uint8_t mode, proto; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); @@ -6578,35 +6835,28 @@ key_acquire2(so, m, mhp) /* * Error message from KMd. - * We assume that if error was occured in IKEd, the length of PFKEY + * We assume that if error was occurred in IKEd, the length of PFKEY * message is equal to the size of sadb_msg structure. - * We do not raise error even if error occured in this function. + * We do not raise error even if error occurred in this function. */ if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { - struct secacq *acq; - /* check sequence number */ - if (mhp->msg->sadb_msg_seq == 0) { + if (mhp->msg->sadb_msg_seq == 0 || + mhp->msg->sadb_msg_errno == 0) { ipseclog((LOG_DEBUG, "%s: must specify sequence " - "number.\n", __func__)); - m_freem(m); - return 0; - } - - if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { + "number and errno.\n", __func__)); + } else { /* - * the specified larval SA is already gone, or we got - * a bogus sequence number. we can silently ignore it. + * IKEd reported that error occurred. + * XXXAE: what it expects from the kernel? + * Probably we should send SADB_ACQUIRE again? + * If so, reset ACQ's state. + * XXXAE: it looks useless. */ - m_freem(m); - return 0; + key_acqreset(mhp->msg->sadb_msg_seq); } - - /* reset acq counter in order to deletion by timehander. */ - acq->created = time_second; - acq->count = 0; m_freem(m); - return 0; + return (0); } /* @@ -6616,79 +6866,60 @@ key_acquire2(so, m, mhp) /* map satype to proto */ if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", - __func__)); + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || - mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || - mhp->ext[SADB_EXT_PROPOSAL] == NULL) { - /* error */ - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) || + SADB_CHECKHDR(mhp, SADB_EXT_PROPOSAL)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: missing required header.\n", + __func__)); return key_senderror(so, m, EINVAL); } - if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || - mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { - /* error */ - ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", - __func__)); + if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) || + SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) || + SADB_CHECKLEN(mhp, SADB_EXT_PROPOSAL)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); return key_senderror(so, m, EINVAL); } - src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; - dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; - - /* XXX boundary check against sa_len */ - KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); - - /* - * Make sure the port numbers are zero. - * In case of NAT-T we will update them later if needed. - */ - KEY_PORTTOSADDR(&saidx.src, 0); - KEY_PORTTOSADDR(&saidx.dst, 0); - -#ifndef IPSEC_NAT_T - /* - * Handle NAT-T info if present. - */ - - if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && - mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { - struct sadb_x_nat_t_port *sport, *dport; - - if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || - mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { - ipseclog((LOG_DEBUG, "%s: invalid message.\n", + if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) { + mode = IPSEC_MODE_ANY; + reqid = 0; + } else { + if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) { + ipseclog((LOG_DEBUG, + "%s: invalid message: wrong header size.\n", __func__)); return key_senderror(so, m, EINVAL); } + mode = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; + reqid = ((struct sadb_x_sa2 *) + mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; + } - sport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_SPORT]; - dport = (struct sadb_x_nat_t_port *) - mhp->ext[SADB_X_EXT_NAT_T_DPORT]; + src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; + dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; - if (sport) - KEY_PORTTOSADDR(&saidx.src, - sport->sadb_x_nat_t_port_port); - if (dport) - KEY_PORTTOSADDR(&saidx.dst, - dport->sadb_x_nat_t_port_port); + error = key_checksockaddrs((struct sockaddr *)(src0 + 1), + (struct sockaddr *)(dst0 + 1)); + if (error != 0) { + ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__)); + return key_senderror(so, m, EINVAL); } -#endif + KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); /* get a SA index */ - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (sah->state == SADB_SASTATE_DEAD) - continue; + SAHTREE_RLOCK(); + LIST_FOREACH(sah, SAHADDRHASH_HASH(&saidx), addrhash) { if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) break; } - SAHTREE_UNLOCK(); + SAHTREE_RUNLOCK(); if (sah != NULL) { ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); return key_senderror(so, m, EEXIST); @@ -6696,12 +6927,13 @@ key_acquire2(so, m, mhp) error = key_acquire(&saidx, NULL); if (error != 0) { - ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", - __func__, mhp->msg->sadb_msg_errno)); + ipseclog((LOG_DEBUG, + "%s: error %d returned from key_acquire()\n", + __func__, error)); return key_senderror(so, m, error); } - - return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); + m_freem(m); + return (0); } /* @@ -6718,12 +6950,9 @@ key_acquire2(so, m, mhp) * m will always be freed. */ static int -key_register(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_register(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { - struct secreg *reg, *newreg = 0; + struct secreg *reg, *newreg = NULL; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); @@ -6777,14 +7006,14 @@ key_register(so, m, mhp) /* create new sadb_msg to reply. */ alen = 0; for (i = 1; i <= SADB_AALG_MAX; i++) { - if (ah_algorithm_lookup(i)) + if (auth_algorithm_lookup(i)) alen += sizeof(struct sadb_alg); } if (alen) alen += sizeof(struct sadb_supported); elen = 0; for (i = 1; i <= SADB_EALG_MAX; i++) { - if (esp_algorithm_lookup(i)) + if (enc_algorithm_lookup(i)) elen += sizeof(struct sadb_alg); } if (elen) @@ -6795,10 +7024,9 @@ key_register(so, m, mhp) if (len > MCLBYTES) return key_senderror(so, m, ENOBUFS); - MGETHDR(n, M_DONTWAIT, MT_DATA); + MGETHDR(n, M_NOWAIT, MT_DATA); if (len > MHLEN) { - MCLGET(n, M_DONTWAIT); - if ((n->m_flags & M_EXT) == 0) { + if (!(MCLGET(n, M_NOWAIT))) { m_freem(n); n = NULL; } @@ -6824,10 +7052,10 @@ key_register(so, m, mhp) off += PFKEY_ALIGN8(sizeof(*sup)); for (i = 1; i <= SADB_AALG_MAX; i++) { - struct auth_hash *aalgo; + const struct auth_hash *aalgo; u_int16_t minkeysize, maxkeysize; - aalgo = ah_algorithm_lookup(i); + aalgo = auth_algorithm_lookup(i); if (!aalgo) continue; alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); @@ -6848,14 +7076,14 @@ key_register(so, m, mhp) off += PFKEY_ALIGN8(sizeof(*sup)); for (i = 1; i <= SADB_EALG_MAX; i++) { - struct enc_xform *ealgo; + const struct enc_xform *ealgo; - ealgo = esp_algorithm_lookup(i); + ealgo = enc_algorithm_lookup(i); if (!ealgo) continue; alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); alg->sadb_alg_id = i; - alg->sadb_alg_ivlen = ealgo->blocksize; + alg->sadb_alg_ivlen = ealgo->ivsize; alg->sadb_alg_minbits = _BITS(ealgo->minkey); alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); @@ -6911,21 +7139,21 @@ key_freereg(struct socket *so) * others : error number */ static int -key_expire(struct secasvar *sav) +key_expire(struct secasvar *sav, int hard) { - int s; - int satype; struct mbuf *result = NULL, *m; - int len; - int error = -1; struct sadb_lifetime *lt; - - /* XXX: Why do we lock ? */ - s = splnet(); /*called from softclock()*/ + uint32_t replay_count; + int error, len; + uint8_t satype; IPSEC_ASSERT (sav != NULL, ("null sav")); IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); + KEYDBG(KEY_STAMP, + printf("%s: SA(%p) expired %s lifetime\n", __func__, + sav, hard ? "hard": "soft")); + KEYDBG(KEY_DATA, kdebug_secasv(sav)); /* set msg header */ satype = key_proto2satype(sav->sah->saidx.proto); IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); @@ -6945,8 +7173,11 @@ key_expire(struct secasvar *sav) m_cat(result, m); /* create SA extension */ - m = key_setsadbxsa2(sav->sah->saidx.mode, - sav->replay ? sav->replay->count : 0, + SECASVAR_LOCK(sav); + replay_count = sav->replay ? sav->replay->count : 0; + SECASVAR_UNLOCK(sav); + + m = key_setsadbxsa2(sav->sah->saidx.mode, replay_count, sav->sah->saidx.reqid); if (!m) { error = ENOBUFS; @@ -6954,30 +7185,49 @@ key_expire(struct secasvar *sav) } m_cat(result, m); + if (sav->replay && sav->replay->wsize > UINT8_MAX) { + m = key_setsadbxsareplay(sav->replay->wsize); + if (!m) { + error = ENOBUFS; + goto fail; + } + m_cat(result, m); + } + /* create lifetime extension (current and soft) */ len = PFKEY_ALIGN8(sizeof(*lt)) * 2; - m = key_alloc_mbuf(len); - if (!m || m->m_next) { /*XXX*/ - if (m) - m_freem(m); + m = m_get2(len, M_NOWAIT, MT_DATA, 0); + if (m == NULL) { error = ENOBUFS; goto fail; } + m_align(m, len); + m->m_len = len; bzero(mtod(m, caddr_t), len); lt = mtod(m, struct sadb_lifetime *); lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; - lt->sadb_lifetime_allocations = sav->lft_c->allocations; - lt->sadb_lifetime_bytes = sav->lft_c->bytes; - lt->sadb_lifetime_addtime = sav->lft_c->addtime; - lt->sadb_lifetime_usetime = sav->lft_c->usetime; + lt->sadb_lifetime_allocations = + (uint32_t)counter_u64_fetch(sav->lft_c_allocations); + lt->sadb_lifetime_bytes = + counter_u64_fetch(sav->lft_c_bytes); + lt->sadb_lifetime_addtime = sav->created; + lt->sadb_lifetime_usetime = sav->firstused; lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); - lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; - lt->sadb_lifetime_allocations = sav->lft_s->allocations; - lt->sadb_lifetime_bytes = sav->lft_s->bytes; - lt->sadb_lifetime_addtime = sav->lft_s->addtime; - lt->sadb_lifetime_usetime = sav->lft_s->usetime; + if (hard) { + lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; + lt->sadb_lifetime_allocations = sav->lft_h->allocations; + lt->sadb_lifetime_bytes = sav->lft_h->bytes; + lt->sadb_lifetime_addtime = sav->lft_h->addtime; + lt->sadb_lifetime_usetime = sav->lft_h->usetime; + } else { + lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; + lt->sadb_lifetime_allocations = sav->lft_s->allocations; + lt->sadb_lifetime_bytes = sav->lft_s->bytes; + lt->sadb_lifetime_addtime = sav->lft_s->addtime; + lt->sadb_lifetime_usetime = sav->lft_s->usetime; + } m_cat(result, m); /* set sadb_address for source */ @@ -7002,6 +7252,8 @@ key_expire(struct secasvar *sav) /* * XXX-BZ Handle NAT-T extensions here. + * XXXAE: it doesn't seem quite useful. IKEs should not depend on + * this information, we report only significant SA fields. */ if ((result->m_flags & M_PKTHDR) == 0) { @@ -7024,16 +7276,44 @@ key_expire(struct secasvar *sav) mtod(result, struct sadb_msg *)->sadb_msg_len = PFKEY_UNIT64(result->m_pkthdr.len); - splx(s); return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); fail: if (result) m_freem(result); - splx(s); return error; } +static void +key_freesah_flushed(struct secashead_queue *flushq) +{ + struct secashead *sah, *nextsah; + struct secasvar *sav, *nextsav; + + sah = TAILQ_FIRST(flushq); + while (sah != NULL) { + sav = TAILQ_FIRST(&sah->savtree_larval); + while (sav != NULL) { + nextsav = TAILQ_NEXT(sav, chain); + TAILQ_REMOVE(&sah->savtree_larval, sav, chain); + key_freesav(&sav); /* release last reference */ + key_freesah(&sah); /* release reference from SAV */ + sav = nextsav; + } + sav = TAILQ_FIRST(&sah->savtree_alive); + while (sav != NULL) { + nextsav = TAILQ_NEXT(sav, chain); + TAILQ_REMOVE(&sah->savtree_alive, sav, chain); + key_freesav(&sav); /* release last reference */ + key_freesah(&sah); /* release reference from SAV */ + sav = nextsav; + } + nextsah = TAILQ_NEXT(sah, chain); + key_freesah(&sah); /* release last reference */ + sah = nextsah; + } +} + /* * SADB_FLUSH processing * receive @@ -7047,17 +7327,14 @@ key_expire(struct secasvar *sav) * m will always be freed. */ static int -key_flush(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_flush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { + struct secashead_queue flushq; struct sadb_msg *newmsg; struct secashead *sah, *nextsah; - struct secasvar *sav, *nextsav; - u_int16_t proto; - u_int8_t state; - u_int stateidx; + struct secasvar *sav; + uint8_t proto; + int i; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(mhp != NULL, ("null msghdr")); @@ -7069,37 +7346,71 @@ key_flush(so, m, mhp) __func__)); return key_senderror(so, m, EINVAL); } - - /* no SATYPE specified, i.e. flushing all SA. */ - SAHTREE_LOCK(); - for (sah = LIST_FIRST(&V_sahtree); - sah != NULL; - sah = nextsah) { - nextsah = LIST_NEXT(sah, chain); - - if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC - && proto != sah->saidx.proto) - continue; - - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_alive); - stateidx++) { - state = saorder_state_any[stateidx]; - for (sav = LIST_FIRST(&sah->savtree[state]); - sav != NULL; - sav = nextsav) { - - nextsav = LIST_NEXT(sav, chain); - - key_sa_chgstate(sav, SADB_SASTATE_DEAD); - KEY_FREESAV(&sav); + KEYDBG(KEY_STAMP, + printf("%s: proto %u\n", __func__, proto)); + + TAILQ_INIT(&flushq); + if (proto == IPSEC_PROTO_ANY) { + /* no SATYPE specified, i.e. flushing all SA. */ + SAHTREE_WLOCK(); + /* Move all SAHs into flushq */ + TAILQ_CONCAT(&flushq, &V_sahtree, chain); + /* Flush all buckets in SPI hash */ + for (i = 0; i < V_savhash_mask + 1; i++) + LIST_INIT(&V_savhashtbl[i]); + /* Flush all buckets in SAHADDRHASH */ + for (i = 0; i < V_sahaddrhash_mask + 1; i++) + LIST_INIT(&V_sahaddrhashtbl[i]); + /* Mark all SAHs as unlinked */ + TAILQ_FOREACH(sah, &flushq, chain) { + sah->state = SADB_SASTATE_DEAD; + /* + * Callout handler makes its job using + * RLOCK and drain queues. In case, when this + * function will be called just before it + * acquires WLOCK, we need to mark SAs as + * unlinked to prevent second unlink. + */ + TAILQ_FOREACH(sav, &sah->savtree_larval, chain) { + sav->state = SADB_SASTATE_DEAD; + } + TAILQ_FOREACH(sav, &sah->savtree_alive, chain) { + sav->state = SADB_SASTATE_DEAD; } } - - sah->state = SADB_SASTATE_DEAD; + SAHTREE_WUNLOCK(); + } else { + SAHTREE_WLOCK(); + sah = TAILQ_FIRST(&V_sahtree); + while (sah != NULL) { + IPSEC_ASSERT(sah->state != SADB_SASTATE_DEAD, + ("DEAD SAH %p in SADB_FLUSH", sah)); + nextsah = TAILQ_NEXT(sah, chain); + if (sah->saidx.proto != proto) { + sah = nextsah; + continue; + } + sah->state = SADB_SASTATE_DEAD; + TAILQ_REMOVE(&V_sahtree, sah, chain); + LIST_REMOVE(sah, addrhash); + /* Unlink all SAs from SPI hash */ + TAILQ_FOREACH(sav, &sah->savtree_larval, chain) { + LIST_REMOVE(sav, spihash); + sav->state = SADB_SASTATE_DEAD; + } + TAILQ_FOREACH(sav, &sah->savtree_alive, chain) { + LIST_REMOVE(sav, spihash); + sav->state = SADB_SASTATE_DEAD; + } + /* Add SAH into flushq */ + TAILQ_INSERT_HEAD(&flushq, sah, chain); + sah = nextsah; + } + SAHTREE_WUNLOCK(); } - SAHTREE_UNLOCK(); + key_freesah_flushed(&flushq); + /* Free all queued SAs and SAHs */ if (m->m_len < sizeof(struct sadb_msg) || sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); @@ -7130,20 +7441,15 @@ key_flush(so, m, mhp) * m will always be freed. */ static int -key_dump(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_dump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { + SAHTREE_RLOCK_TRACKER; struct secashead *sah; struct secasvar *sav; - u_int16_t proto; - u_int stateidx; - u_int8_t satype; - u_int8_t state; - int cnt; struct sadb_msg *newmsg; struct mbuf *n; + uint32_t cnt; + uint8_t proto, satype; IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); @@ -7153,79 +7459,73 @@ key_dump(so, m, mhp) /* map satype to proto */ if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", - __func__)); + __func__)); return key_senderror(so, m, EINVAL); } /* count sav entries to be sent to the userland. */ cnt = 0; - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC - && proto != sah->saidx.proto) + SAHTREE_RLOCK(); + TAILQ_FOREACH(sah, &V_sahtree, chain) { + if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && + proto != sah->saidx.proto) continue; - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_any); - stateidx++) { - state = saorder_state_any[stateidx]; - LIST_FOREACH(sav, &sah->savtree[state], chain) { - cnt++; - } - } + TAILQ_FOREACH(sav, &sah->savtree_larval, chain) + cnt++; + TAILQ_FOREACH(sav, &sah->savtree_alive, chain) + cnt++; } if (cnt == 0) { - SAHTREE_UNLOCK(); + SAHTREE_RUNLOCK(); return key_senderror(so, m, ENOENT); } /* send this to the userland, one at a time. */ newmsg = NULL; - LIST_FOREACH(sah, &V_sahtree, chain) { - if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC - && proto != sah->saidx.proto) + TAILQ_FOREACH(sah, &V_sahtree, chain) { + if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && + proto != sah->saidx.proto) continue; /* map proto to satype */ if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { - SAHTREE_UNLOCK(); + SAHTREE_RUNLOCK(); ipseclog((LOG_DEBUG, "%s: there was invalid proto in " - "SAD.\n", __func__)); + "SAD.\n", __func__)); return key_senderror(so, m, EINVAL); } - - for (stateidx = 0; - stateidx < _ARRAYLEN(saorder_state_any); - stateidx++) { - state = saorder_state_any[stateidx]; - LIST_FOREACH(sav, &sah->savtree[state], chain) { - n = key_setdumpsa(sav, SADB_DUMP, satype, - --cnt, mhp->msg->sadb_msg_pid); - if (!n) { - SAHTREE_UNLOCK(); - return key_senderror(so, m, ENOBUFS); - } - key_sendup_mbuf(so, n, KEY_SENDUP_ONE); + TAILQ_FOREACH(sav, &sah->savtree_larval, chain) { + n = key_setdumpsa(sav, SADB_DUMP, satype, + --cnt, mhp->msg->sadb_msg_pid); + if (n == NULL) { + SAHTREE_RUNLOCK(); + return key_senderror(so, m, ENOBUFS); + } + key_sendup_mbuf(so, n, KEY_SENDUP_ONE); + } + TAILQ_FOREACH(sav, &sah->savtree_alive, chain) { + n = key_setdumpsa(sav, SADB_DUMP, satype, + --cnt, mhp->msg->sadb_msg_pid); + if (n == NULL) { + SAHTREE_RUNLOCK(); + return key_senderror(so, m, ENOBUFS); } + key_sendup_mbuf(so, n, KEY_SENDUP_ONE); } } - SAHTREE_UNLOCK(); - + SAHTREE_RUNLOCK(); m_freem(m); - return 0; + return (0); } - /* * SADB_X_PROMISC processing * * m will always be freed. */ static int -key_promisc(so, m, mhp) - struct socket *so; - struct mbuf *m; - const struct sadb_msghdr *mhp; +key_promisc(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) { int olen; @@ -7272,8 +7572,8 @@ key_promisc(so, m, mhp) } } -static int (*key_typesw[]) __P((struct socket *, struct mbuf *, - const struct sadb_msghdr *)) = { +static int (*key_typesw[])(struct socket *, struct mbuf *, + const struct sadb_msghdr *) = { NULL, /* SADB_RESERVED */ key_getspi, /* SADB_GETSPI */ key_update, /* SADB_UPDATE */ @@ -7311,9 +7611,7 @@ static int (*key_typesw[]) __P((struct socket *, struct mbuf *, * length for buffer to send to user process. */ int -key_parse(m, so) - struct mbuf *m; - struct socket *so; +key_parse(struct mbuf *m, struct socket *so) { struct sadb_msg *msg; struct sadb_msghdr mh; @@ -7324,12 +7622,6 @@ key_parse(m, so) IPSEC_ASSERT(so != NULL, ("null socket")); IPSEC_ASSERT(m != NULL, ("null mbuf")); -#if 0 /*kdebug_sadb assumes msg in linear buffer*/ - KEYDEBUG(KEYDEBUG_KEY_DUMP, - ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); - kdebug_sadb(msg)); -#endif - if (m->m_len < sizeof(struct sadb_msg)) { m = m_pullup(m, sizeof(struct sadb_msg)); if (!m) @@ -7339,8 +7631,7 @@ key_parse(m, so) orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); target = KEY_SENDUP_ONE; - if ((m->m_flags & M_PKTHDR) == 0 || - m->m_pkthdr.len != m->m_pkthdr.len) { + if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len != orglen) { ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); PFKEYSTAT_INC(out_invlen); error = EINVAL; @@ -7371,10 +7662,9 @@ key_parse(m, so) if (m->m_next) { struct mbuf *n; - MGETHDR(n, M_DONTWAIT, MT_DATA); + MGETHDR(n, M_NOWAIT, MT_DATA); if (n && m->m_pkthdr.len > MHLEN) { - MCLGET(n, M_DONTWAIT); - if ((n->m_flags & M_EXT) == 0) { + if (!(MCLGET(n, M_NOWAIT))) { m_free(n); n = NULL; } @@ -7397,64 +7687,79 @@ key_parse(m, so) msg = mh.msg; - /* check SA type */ - switch (msg->sadb_msg_satype) { - case SADB_SATYPE_UNSPEC: - switch (msg->sadb_msg_type) { - case SADB_GETSPI: - case SADB_UPDATE: - case SADB_ADD: - case SADB_DELETE: - case SADB_GET: - case SADB_ACQUIRE: - case SADB_EXPIRE: - ipseclog((LOG_DEBUG, "%s: must specify satype " - "when msg type=%u.\n", __func__, - msg->sadb_msg_type)); + /* We use satype as scope mask for spddump */ + if (msg->sadb_msg_type == SADB_X_SPDDUMP) { + switch (msg->sadb_msg_satype) { + case IPSEC_POLICYSCOPE_ANY: + case IPSEC_POLICYSCOPE_GLOBAL: + case IPSEC_POLICYSCOPE_IFNET: + case IPSEC_POLICYSCOPE_PCB: + break; + default: + ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", + __func__, msg->sadb_msg_type)); PFKEYSTAT_INC(out_invsatype); error = EINVAL; goto senderror; } - break; - case SADB_SATYPE_AH: - case SADB_SATYPE_ESP: - case SADB_X_SATYPE_IPCOMP: - case SADB_X_SATYPE_TCPSIGNATURE: - switch (msg->sadb_msg_type) { - case SADB_X_SPDADD: - case SADB_X_SPDDELETE: - case SADB_X_SPDGET: - case SADB_X_SPDDUMP: - case SADB_X_SPDFLUSH: - case SADB_X_SPDSETIDX: - case SADB_X_SPDUPDATE: - case SADB_X_SPDDELETE2: - ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", - __func__, msg->sadb_msg_type)); + } else { + switch (msg->sadb_msg_satype) { /* check SA type */ + case SADB_SATYPE_UNSPEC: + switch (msg->sadb_msg_type) { + case SADB_GETSPI: + case SADB_UPDATE: + case SADB_ADD: + case SADB_DELETE: + case SADB_GET: + case SADB_ACQUIRE: + case SADB_EXPIRE: + ipseclog((LOG_DEBUG, "%s: must specify satype " + "when msg type=%u.\n", __func__, + msg->sadb_msg_type)); + PFKEYSTAT_INC(out_invsatype); + error = EINVAL; + goto senderror; + } + break; + case SADB_SATYPE_AH: + case SADB_SATYPE_ESP: + case SADB_X_SATYPE_IPCOMP: + case SADB_X_SATYPE_TCPSIGNATURE: + switch (msg->sadb_msg_type) { + case SADB_X_SPDADD: + case SADB_X_SPDDELETE: + case SADB_X_SPDGET: + case SADB_X_SPDFLUSH: + case SADB_X_SPDSETIDX: + case SADB_X_SPDUPDATE: + case SADB_X_SPDDELETE2: + ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", + __func__, msg->sadb_msg_type)); + PFKEYSTAT_INC(out_invsatype); + error = EINVAL; + goto senderror; + } + break; + case SADB_SATYPE_RSVP: + case SADB_SATYPE_OSPFV2: + case SADB_SATYPE_RIPV2: + case SADB_SATYPE_MIP: + ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", + __func__, msg->sadb_msg_satype)); + PFKEYSTAT_INC(out_invsatype); + error = EOPNOTSUPP; + goto senderror; + case 1: /* XXX: What does it do? */ + if (msg->sadb_msg_type == SADB_X_PROMISC) + break; + /*FALLTHROUGH*/ + default: + ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", + __func__, msg->sadb_msg_satype)); PFKEYSTAT_INC(out_invsatype); error = EINVAL; goto senderror; } - break; - case SADB_SATYPE_RSVP: - case SADB_SATYPE_OSPFV2: - case SADB_SATYPE_RIPV2: - case SADB_SATYPE_MIP: - ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", - __func__, msg->sadb_msg_satype)); - PFKEYSTAT_INC(out_invsatype); - error = EOPNOTSUPP; - goto senderror; - case 1: /* XXX: What does it do? */ - if (msg->sadb_msg_type == SADB_X_PROMISC) - break; - /*FALLTHROUGH*/ - default: - ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", - __func__, msg->sadb_msg_satype)); - PFKEYSTAT_INC(out_invsatype); - error = EINVAL; - goto senderror; } /* check field of upper layer protocol and address family */ @@ -7546,7 +7851,7 @@ key_parse(m, so) */ } - if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || + if (msg->sadb_msg_type >= nitems(key_typesw) || key_typesw[msg->sadb_msg_type] == NULL) { PFKEYSTAT_INC(out_invmsgtype); error = EINVAL; @@ -7561,10 +7866,7 @@ senderror: } static int -key_senderror(so, m, code) - struct socket *so; - struct mbuf *m; - int code; +key_senderror(struct socket *so, struct mbuf *m, int code) { struct sadb_msg *msg; @@ -7582,9 +7884,7 @@ key_senderror(so, m, code) * XXX larger-than-MCLBYTES extension? */ static int -key_align(m, mhp) - struct mbuf *m; - struct sadb_msghdr *mhp; +key_align(struct mbuf *m, struct sadb_msghdr *mhp) { struct mbuf *n; struct sadb_ext *ext; @@ -7633,14 +7933,15 @@ key_align(m, mhp) case SADB_EXT_SPIRANGE: case SADB_X_EXT_POLICY: case SADB_X_EXT_SA2: -#ifdef IPSEC_NAT_T case SADB_X_EXT_NAT_T_TYPE: case SADB_X_EXT_NAT_T_SPORT: case SADB_X_EXT_NAT_T_DPORT: case SADB_X_EXT_NAT_T_OAI: case SADB_X_EXT_NAT_T_OAR: case SADB_X_EXT_NAT_T_FRAG: -#endif + case SADB_X_EXT_SA_REPLAY: + case SADB_X_EXT_NEW_ADDRESS_SRC: + case SADB_X_EXT_NEW_ADDRESS_DST: /* duplicate check */ /* * XXX Are there duplication payloads of either @@ -7692,9 +7993,7 @@ key_align(m, mhp) } static int -key_validate_ext(ext, len) - const struct sadb_ext *ext; - int len; +key_validate_ext(const struct sadb_ext *ext, int len) { const struct sockaddr *sa; enum { NONE, ADDR } checktype = NONE; @@ -7705,8 +8004,8 @@ key_validate_ext(ext, len) return EINVAL; /* if it does not match minimum/maximum length, bail */ - if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || - ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) + if (ext->sadb_ext_type >= nitems(minsize) || + ext->sadb_ext_type >= nitems(maxsize)) return EINVAL; if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) return EINVAL; @@ -7718,6 +8017,10 @@ key_validate_ext(ext, len) case SADB_EXT_ADDRESS_SRC: case SADB_EXT_ADDRESS_DST: case SADB_EXT_ADDRESS_PROXY: + case SADB_X_EXT_NAT_T_OAI: + case SADB_X_EXT_NAT_T_OAR: + case SADB_X_EXT_NEW_ADDRESS_SRC: + case SADB_X_EXT_NEW_ADDRESS_DST: baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); checktype = ADDR; break; @@ -7755,10 +8058,24 @@ key_init(void) { int i; - for (i = 0; i < IPSEC_DIR_MAX; i++) - LIST_INIT(&V_sptree[i]); + for (i = 0; i < IPSEC_DIR_MAX; i++) { + TAILQ_INIT(&V_sptree[i]); + TAILQ_INIT(&V_sptree_ifnet[i]); + } + + V_key_lft_zone = uma_zcreate("IPsec SA lft_c", + sizeof(uint64_t) * 2, NULL, NULL, NULL, NULL, + UMA_ALIGN_PTR, UMA_ZONE_PCPU); - LIST_INIT(&V_sahtree); + TAILQ_INIT(&V_sahtree); + V_sphashtbl = hashinit(SPHASH_NHASH, M_IPSEC_SP, &V_sphash_mask); + V_savhashtbl = hashinit(SAVHASH_NHASH, M_IPSEC_SA, &V_savhash_mask); + V_sahaddrhashtbl = hashinit(SAHHASH_NHASH, M_IPSEC_SAH, + &V_sahaddrhash_mask); + V_acqaddrhashtbl = hashinit(ACQHASH_NHASH, M_IPSEC_SAQ, + &V_acqaddrhash_mask); + V_acqseqhashtbl = hashinit(ACQHASH_NHASH, M_IPSEC_SAQ, + &V_acqseqhash_mask); for (i = 0; i <= SADB_SATYPE_MAX; i++) LIST_INIT(&V_regtree[i]); @@ -7766,13 +8083,10 @@ key_init(void) LIST_INIT(&V_acqtree); LIST_INIT(&V_spacqtree); - /* system default */ - V_ip4_def_policy.policy = IPSEC_POLICY_NONE; - V_ip4_def_policy.refcnt++; /*never reclaim this*/ - if (!IS_DEFAULT_VNET(curvnet)) return; + XFORMS_LOCK_INIT(); SPTREE_LOCK_INIT(); REGTREE_LOCK_INIT(); SAHTREE_LOCK_INIT(); @@ -7780,48 +8094,71 @@ key_init(void) SPACQ_LOCK_INIT(); #ifndef IPSEC_DEBUG2 - timeout((void *)key_timehandler, (void *)0, hz); + callout_init(&key_timer, 1); + callout_reset(&key_timer, hz, key_timehandler, NULL); #endif /*IPSEC_DEBUG2*/ /* initialize key statistics */ keystat.getspi_count = 1; - printf("IPsec: Initialized Security Association Processing.\n"); + if (bootverbose) + printf("IPsec: Initialized Security Association Processing.\n"); } #ifdef VIMAGE void key_destroy(void) { + struct secashead_queue sahdrainq; + struct secpolicy_queue drainq; struct secpolicy *sp, *nextsp; struct secacq *acq, *nextacq; struct secspacq *spacq, *nextspacq; - struct secashead *sah, *nextsah; + struct secashead *sah; + struct secasvar *sav; struct secreg *reg; int i; - SPTREE_LOCK(); + /* + * XXX: can we just call free() for each object without + * walking through safe way with releasing references? + */ + TAILQ_INIT(&drainq); + SPTREE_WLOCK(); for (i = 0; i < IPSEC_DIR_MAX; i++) { - for (sp = LIST_FIRST(&V_sptree[i]); - sp != NULL; sp = nextsp) { - nextsp = LIST_NEXT(sp, chain); - if (__LIST_CHAINED(sp)) { - LIST_REMOVE(sp, chain); - free(sp, M_IPSEC_SP); - } + TAILQ_CONCAT(&drainq, &V_sptree[i], chain); + TAILQ_CONCAT(&drainq, &V_sptree_ifnet[i], chain); + } + SPTREE_WUNLOCK(); + sp = TAILQ_FIRST(&drainq); + while (sp != NULL) { + nextsp = TAILQ_NEXT(sp, chain); + key_freesp(&sp); + sp = nextsp; + } + + TAILQ_INIT(&sahdrainq); + SAHTREE_WLOCK(); + TAILQ_CONCAT(&sahdrainq, &V_sahtree, chain); + for (i = 0; i < V_savhash_mask + 1; i++) + LIST_INIT(&V_savhashtbl[i]); + for (i = 0; i < V_sahaddrhash_mask + 1; i++) + LIST_INIT(&V_sahaddrhashtbl[i]); + TAILQ_FOREACH(sah, &sahdrainq, chain) { + sah->state = SADB_SASTATE_DEAD; + TAILQ_FOREACH(sav, &sah->savtree_larval, chain) { + sav->state = SADB_SASTATE_DEAD; } - } - SPTREE_UNLOCK(); - - SAHTREE_LOCK(); - for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { - nextsah = LIST_NEXT(sah, chain); - if (__LIST_CHAINED(sah)) { - LIST_REMOVE(sah, chain); - free(sah, M_IPSEC_SAH); + TAILQ_FOREACH(sav, &sah->savtree_alive, chain) { + sav->state = SADB_SASTATE_DEAD; } } - SAHTREE_UNLOCK(); + SAHTREE_WUNLOCK(); + + key_freesah_flushed(&sahdrainq); + hashdestroy(V_sphashtbl, M_IPSEC_SP, V_sphash_mask); + hashdestroy(V_savhashtbl, M_IPSEC_SA, V_savhash_mask); + hashdestroy(V_sahaddrhashtbl, M_IPSEC_SAH, V_sahaddrhash_mask); REGTREE_LOCK(); for (i = 0; i <= SADB_SATYPE_MAX; i++) { @@ -7836,12 +8173,12 @@ key_destroy(void) REGTREE_UNLOCK(); ACQ_LOCK(); - for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { + acq = LIST_FIRST(&V_acqtree); + while (acq != NULL) { nextacq = LIST_NEXT(acq, chain); - if (__LIST_CHAINED(acq)) { - LIST_REMOVE(acq, chain); - free(acq, M_IPSEC_SAQ); - } + LIST_REMOVE(acq, chain); + free(acq, M_IPSEC_SAQ); + acq = nextacq; } ACQ_UNLOCK(); @@ -7855,56 +8192,31 @@ key_destroy(void) } } SPACQ_UNLOCK(); + hashdestroy(V_acqaddrhashtbl, M_IPSEC_SAQ, V_acqaddrhash_mask); + hashdestroy(V_acqseqhashtbl, M_IPSEC_SAQ, V_acqseqhash_mask); + uma_zdestroy(V_key_lft_zone); } #endif -/* - * XXX: maybe This function is called after INBOUND IPsec processing. - * - * Special check for tunnel-mode packets. - * We must make some checks for consistency between inner and outer IP header. - * - * xxx more checks to be provided - */ -int -key_checktunnelsanity(sav, family, src, dst) - struct secasvar *sav; - u_int family; - caddr_t src; - caddr_t dst; -{ - IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); - - /* XXX: check inner IP header */ - - return 1; -} - /* record data transfer on SA, and update timestamps */ void -key_sa_recordxfer(sav, m) - struct secasvar *sav; - struct mbuf *m; +key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) { IPSEC_ASSERT(sav != NULL, ("Null secasvar")); IPSEC_ASSERT(m != NULL, ("Null mbuf")); - if (!sav->lft_c) - return; /* * XXX Currently, there is a difference of bytes size * between inbound and outbound processing. */ - sav->lft_c->bytes += m->m_pkthdr.len; - /* to check bytes lifetime is done in key_timehandler(). */ + counter_u64_add(sav->lft_c_bytes, m->m_pkthdr.len); /* * We use the number of packets as the unit of * allocations. We increment the variable * whenever {esp,ah}_{in,out}put is called. */ - sav->lft_c->allocations++; - /* XXX check for expires? */ + counter_u64_add(sav->lft_c_allocations, 1); /* * NOTE: We record CURRENT usetime by using wall clock, @@ -7917,92 +8229,8 @@ key_sa_recordxfer(sav, m) * <--------------> HARD * <-----> SOFT */ - sav->lft_c->usetime = time_second; - /* XXX check for expires? */ - - return; -} - -/* dumb version */ -void -key_sa_routechange(dst) - struct sockaddr *dst; -{ - struct secashead *sah; - struct route *ro; - - SAHTREE_LOCK(); - LIST_FOREACH(sah, &V_sahtree, chain) { - ro = &sah->route_cache.sa_route; - if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len - && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { - RTFREE(ro->ro_rt); - ro->ro_rt = (struct rtentry *)NULL; - } - } - SAHTREE_UNLOCK(); -} - -static void -key_sa_chgstate(struct secasvar *sav, u_int8_t state) -{ - IPSEC_ASSERT(sav != NULL, ("NULL sav")); - SAHTREE_LOCK_ASSERT(); - - if (sav->state != state) { - if (__LIST_CHAINED(sav)) - LIST_REMOVE(sav, chain); - sav->state = state; - LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); - } -} - -void -key_sa_stir_iv(sav) - struct secasvar *sav; -{ - - IPSEC_ASSERT(sav->iv != NULL, ("null IV")); - key_randomfill(sav->iv, sav->ivlen); -} - -/* XXX too much? */ -static struct mbuf * -key_alloc_mbuf(l) - int l; -{ - struct mbuf *m = NULL, *n; - int len, t; - - len = l; - while (len > 0) { - MGET(n, M_DONTWAIT, MT_DATA); - if (n && len > MLEN) - MCLGET(n, M_DONTWAIT); - if (!n) { - m_freem(m); - return NULL; - } - - n->m_next = NULL; - n->m_len = 0; - n->m_len = M_TRAILINGSPACE(n); - /* use the bottom of mbuf, hoping we can prepend afterwards */ - if (n->m_len > len) { - t = (n->m_len - len) & ~(sizeof(long) - 1); - n->m_data += t; - n->m_len = len; - } - - len -= n->m_len; - - if (m) - m_cat(m, n); - else - m = n; - } - - return m; + if (sav->firstused == 0) + sav->firstused = time_second; } /* @@ -8019,7 +8247,7 @@ key_alloc_mbuf(l) */ static struct mbuf * -key_setkey(struct seckey *src, u_int16_t exttype) +key_setkey(struct seckey *src, uint16_t exttype) { struct mbuf *m; struct sadb_key *p; @@ -8029,9 +8257,11 @@ key_setkey(struct seckey *src, u_int16_t exttype) return NULL; len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); - m = key_alloc_mbuf(len); + m = m_get2(len, M_NOWAIT, MT_DATA, 0); if (m == NULL) return NULL; + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_key *); bzero(p, len); p->sadb_key_len = PFKEY_UNIT64(len); @@ -8057,7 +8287,7 @@ key_setkey(struct seckey *src, u_int16_t exttype) */ static struct mbuf * -key_setlifetime(struct seclifetime *src, u_int16_t exttype) +key_setlifetime(struct seclifetime *src, uint16_t exttype) { struct mbuf *m = NULL; struct sadb_lifetime *p; @@ -8066,9 +8296,11 @@ key_setlifetime(struct seclifetime *src, u_int16_t exttype) if (src == NULL) return NULL; - m = key_alloc_mbuf(len); + m = m_get2(len, M_NOWAIT, MT_DATA, 0); if (m == NULL) return m; + m_align(m, len); + m->m_len = len; p = mtod(m, struct sadb_lifetime *); bzero(p, len); @@ -8082,3 +8314,104 @@ key_setlifetime(struct seclifetime *src, u_int16_t exttype) return m; } + +const struct enc_xform * +enc_algorithm_lookup(int alg) +{ + int i; + + for (i = 0; i < nitems(supported_ealgs); i++) + if (alg == supported_ealgs[i].sadb_alg) + return (supported_ealgs[i].xform); + return (NULL); +} + +const struct auth_hash * +auth_algorithm_lookup(int alg) +{ + int i; + + for (i = 0; i < nitems(supported_aalgs); i++) + if (alg == supported_aalgs[i].sadb_alg) + return (supported_aalgs[i].xform); + return (NULL); +} + +const struct comp_algo * +comp_algorithm_lookup(int alg) +{ + int i; + + for (i = 0; i < nitems(supported_calgs); i++) + if (alg == supported_calgs[i].sadb_alg) + return (supported_calgs[i].xform); + return (NULL); +} + +/* + * Register a transform. + */ +static int +xform_register(struct xformsw* xsp) +{ + struct xformsw *entry; + + XFORMS_LOCK(); + LIST_FOREACH(entry, &xforms, chain) { + if (entry->xf_type == xsp->xf_type) { + XFORMS_UNLOCK(); + return (EEXIST); + } + } + LIST_INSERT_HEAD(&xforms, xsp, chain); + XFORMS_UNLOCK(); + return (0); +} + +void +xform_attach(void *data) +{ + struct xformsw *xsp = (struct xformsw *)data; + + if (xform_register(xsp) != 0) + printf("%s: failed to register %s xform\n", __func__, + xsp->xf_name); +} + +void +xform_detach(void *data) +{ + struct xformsw *xsp = (struct xformsw *)data; + + XFORMS_LOCK(); + LIST_REMOVE(xsp, chain); + XFORMS_UNLOCK(); + + /* Delete all SAs related to this xform. */ + key_delete_xform(xsp); +} + +/* + * Initialize transform support in an sav. + */ +static int +xform_init(struct secasvar *sav, u_short xftype) +{ + struct xformsw *entry; + int ret; + + IPSEC_ASSERT(sav->tdb_xform == NULL, + ("tdb_xform is already initialized")); + + ret = EINVAL; + XFORMS_LOCK(); + LIST_FOREACH(entry, &xforms, chain) { + if (entry->xf_type == xftype) { + ret = (*entry->xf_init)(sav, entry); + break; + } + } + XFORMS_UNLOCK(); + return (ret); +} + |