From bceabc95c1c85d793200446fa85f1ddc6313ea29 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Wed, 9 Oct 2013 22:42:09 +0200 Subject: Move files to match FreeBSD layout --- freebsd/sys/netinet6/ip6_mroute.c | 2065 +++++++++++++++++++++++++++++++++++++ 1 file changed, 2065 insertions(+) create mode 100644 freebsd/sys/netinet6/ip6_mroute.c (limited to 'freebsd/sys/netinet6/ip6_mroute.c') diff --git a/freebsd/sys/netinet6/ip6_mroute.c b/freebsd/sys/netinet6/ip6_mroute.c new file mode 100644 index 00000000..661cd1c0 --- /dev/null +++ b/freebsd/sys/netinet6/ip6_mroute.c @@ -0,0 +1,2065 @@ +#include + +/*- + * Copyright (C) 1998 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $KAME: ip6_mroute.c,v 1.58 2001/12/18 02:36:31 itojun Exp $ + */ + +/*- + * Copyright (c) 1989 Stephen Deering + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Stephen Deering of Stanford University. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93 + * BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp + */ + +/* + * IP multicast forwarding procedures + * + * Written by David Waitzman, BBN Labs, August 1988. + * Modified by Steve Deering, Stanford, February 1989. + * Modified by Mark J. Steiglitz, Stanford, May, 1991 + * Modified by Van Jacobson, LBL, January 1993 + * Modified by Ajit Thyagarajan, PARC, August 1993 + * Modified by Bill Fenner, PARC, April 1994 + * + * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +static MALLOC_DEFINE(M_MRTABLE6, "mf6c", "multicast forwarding cache entry"); + +/* XXX: this is a very common idiom; move to ? */ +#define M_HASCL(m) ((m)->m_flags & M_EXT) + +static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *); +static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); +static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *); +static int set_pim6(int *); +static int socket_send(struct socket *, struct mbuf *, + struct sockaddr_in6 *); + +extern int in6_mcast_loop; +extern struct domain inet6domain; + +static const struct encaptab *pim6_encap_cookie; +static const struct ip6protosw in6_pim_protosw = { + .pr_type = SOCK_RAW, + .pr_domain = &inet6domain, + .pr_protocol = IPPROTO_PIM, + .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, + .pr_input = pim6_input, + .pr_output = rip6_output, + .pr_ctloutput = rip6_ctloutput, + .pr_usrreqs = &rip6_usrreqs +}; +static int pim6_encapcheck(const struct mbuf *, int, int, void *); + +static VNET_DEFINE(int, ip6_mrouter_ver) = 0; +#define V_ip6_mrouter_ver VNET(ip6_mrouter_ver) + +SYSCTL_DECL(_net_inet6); +SYSCTL_DECL(_net_inet6_ip6); +SYSCTL_NODE(_net_inet6, IPPROTO_PIM, pim, CTLFLAG_RW, 0, "PIM"); + +static struct mrt6stat mrt6stat; +SYSCTL_STRUCT(_net_inet6_ip6, OID_AUTO, mrt6stat, CTLFLAG_RW, + &mrt6stat, mrt6stat, + "Multicast Routing Statistics (struct mrt6stat, netinet6/ip6_mroute.h)"); + +#define NO_RTE_FOUND 0x1 +#define RTE_FOUND 0x2 + +static struct mtx mrouter6_mtx; +#define MROUTER6_LOCK() mtx_lock(&mrouter6_mtx) +#define MROUTER6_UNLOCK() mtx_unlock(&mrouter6_mtx) +#define MROUTER6_LOCK_ASSERT() do { \ + mtx_assert(&mrouter6_mtx, MA_OWNED); \ + NET_ASSERT_GIANT(); \ +} while (0) +#define MROUTER6_LOCK_INIT() \ + mtx_init(&mrouter6_mtx, "IPv6 multicast forwarding", NULL, MTX_DEF) +#define MROUTER6_LOCK_DESTROY() mtx_destroy(&mrouter6_mtx) + +static struct mf6c *mf6ctable[MF6CTBLSIZ]; +SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mf6ctable, CTLFLAG_RD, + &mf6ctable, sizeof(mf6ctable), "S,*mf6ctable[MF6CTBLSIZ]", + "IPv6 Multicast Forwarding Table (struct *mf6ctable[MF6CTBLSIZ], " + "netinet6/ip6_mroute.h)"); + +static struct mtx mfc6_mtx; +#define MFC6_LOCK() mtx_lock(&mfc6_mtx) +#define MFC6_UNLOCK() mtx_unlock(&mfc6_mtx) +#define MFC6_LOCK_ASSERT() do { \ + mtx_assert(&mfc6_mtx, MA_OWNED); \ + NET_ASSERT_GIANT(); \ +} while (0) +#define MFC6_LOCK_INIT() \ + mtx_init(&mfc6_mtx, "IPv6 multicast forwarding cache", NULL, MTX_DEF) +#define MFC6_LOCK_DESTROY() mtx_destroy(&mfc6_mtx) + +static u_char n6expire[MF6CTBLSIZ]; + +static struct mif6 mif6table[MAXMIFS]; +SYSCTL_OPAQUE(_net_inet6_ip6, OID_AUTO, mif6table, CTLFLAG_RD, + &mif6table, sizeof(mif6table), "S,mif6[MAXMIFS]", + "IPv6 Multicast Interfaces (struct mif6[MAXMIFS], netinet6/ip6_mroute.h)"); + +static struct mtx mif6_mtx; +#define MIF6_LOCK() mtx_lock(&mif6_mtx) +#define MIF6_UNLOCK() mtx_unlock(&mif6_mtx) +#define MIF6_LOCK_ASSERT() mtx_assert(&mif6_mtx, MA_OWNED) +#define MIF6_LOCK_INIT() \ + mtx_init(&mif6_mtx, "IPv6 multicast interfaces", NULL, MTX_DEF) +#define MIF6_LOCK_DESTROY() mtx_destroy(&mif6_mtx) + +#ifdef MRT6DEBUG +static VNET_DEFINE(u_int, mrt6debug) = 0; /* debug level */ +#define V_mrt6debug VNET(mrt6debug) +#define DEBUG_MFC 0x02 +#define DEBUG_FORWARD 0x04 +#define DEBUG_EXPIRE 0x08 +#define DEBUG_XMIT 0x10 +#define DEBUG_REG 0x20 +#define DEBUG_PIM 0x40 +#endif + +static void expire_upcalls(void *); +#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ +#define UPCALL_EXPIRE 6 /* number of timeouts */ + +/* + * XXX TODO: maintain a count to if_allmulti() calls in struct ifnet. + */ + +/* + * 'Interfaces' associated with decapsulator (so we can tell + * packets that went through it from ones that get reflected + * by a broken gateway). Different from IPv4 register_if, + * these interfaces are linked into the system ifnet list, + * because per-interface IPv6 statistics are maintained in + * ifp->if_afdata. But it does not have any routes point + * to them. I.e., packets can't be sent this way. They + * only exist as a placeholder for multicast source + * verification. + */ +static struct ifnet *multicast_register_if6; + +#define ENCAP_HOPS 64 + +/* + * Private variables. + */ +static mifi_t nummifs = 0; +static mifi_t reg_mif_num = (mifi_t)-1; + +static struct pim6stat pim6stat; +SYSCTL_STRUCT(_net_inet6_pim, PIM6CTL_STATS, stats, CTLFLAG_RD, + &pim6stat, pim6stat, + "PIM Statistics (struct pim6stat, netinet6/pim_var.h)"); + +static VNET_DEFINE(int, pim6); +#define V_pim6 VNET(pim6) + +/* + * Hash function for a source, group entry + */ +#define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \ + (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \ + (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \ + (g).s6_addr32[2] ^ (g).s6_addr32[3]) + +/* + * Find a route for a given origin IPv6 address and Multicast group address. + */ +#define MF6CFIND(o, g, rt) do { \ + struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \ + rt = NULL; \ + mrt6stat.mrt6s_mfc_lookups++; \ + while (_rt) { \ + if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \ + IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \ + (_rt->mf6c_stall == NULL)) { \ + rt = _rt; \ + break; \ + } \ + _rt = _rt->mf6c_next; \ + } \ + if (rt == NULL) { \ + mrt6stat.mrt6s_mfc_misses++; \ + } \ +} while (/*CONSTCOND*/ 0) + +/* + * Macros to compute elapsed time efficiently + * Borrowed from Van Jacobson's scheduling code + * XXX: replace with timersub() ? + */ +#define TV_DELTA(a, b, delta) do { \ + int xxs; \ + \ + delta = (a).tv_usec - (b).tv_usec; \ + if ((xxs = (a).tv_sec - (b).tv_sec)) { \ + switch (xxs) { \ + case 2: \ + delta += 1000000; \ + /* FALLTHROUGH */ \ + case 1: \ + delta += 1000000; \ + break; \ + default: \ + delta += (1000000 * xxs); \ + } \ + } \ +} while (/*CONSTCOND*/ 0) + +/* XXX: replace with timercmp(a, b, <) ? */ +#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ + (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) + +#ifdef UPCALL_TIMING +#define UPCALL_MAX 50 +static u_long upcall_data[UPCALL_MAX + 1]; +static void collate(); +#endif /* UPCALL_TIMING */ + +static int ip6_mrouter_init(struct socket *, int, int); +static int add_m6fc(struct mf6cctl *); +static int add_m6if(struct mif6ctl *); +static int del_m6fc(struct mf6cctl *); +static int del_m6if(mifi_t *); +static int del_m6if_locked(mifi_t *); +static int get_mif6_cnt(struct sioc_mif_req6 *); +static int get_sg_cnt(struct sioc_sg_req6 *); + +static struct callout expire_upcalls_ch; + +int X_ip6_mforward(struct ip6_hdr *, struct ifnet *, struct mbuf *); +int X_ip6_mrouter_done(void); +int X_ip6_mrouter_set(struct socket *, struct sockopt *); +int X_ip6_mrouter_get(struct socket *, struct sockopt *); +int X_mrt6_ioctl(u_long, caddr_t); + +/* + * Handle MRT setsockopt commands to modify the multicast routing tables. + */ +int +X_ip6_mrouter_set(struct socket *so, struct sockopt *sopt) +{ + int error = 0; + int optval; + struct mif6ctl mifc; + struct mf6cctl mfcc; + mifi_t mifi; + + if (so != V_ip6_mrouter && sopt->sopt_name != MRT6_INIT) + return (EACCES); + + switch (sopt->sopt_name) { + case MRT6_INIT: +#ifdef MRT6_OINIT + case MRT6_OINIT: +#endif + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error) + break; + error = ip6_mrouter_init(so, optval, sopt->sopt_name); + break; + case MRT6_DONE: + error = X_ip6_mrouter_done(); + break; + case MRT6_ADD_MIF: + error = sooptcopyin(sopt, &mifc, sizeof(mifc), sizeof(mifc)); + if (error) + break; + error = add_m6if(&mifc); + break; + case MRT6_ADD_MFC: + error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); + if (error) + break; + error = add_m6fc(&mfcc); + break; + case MRT6_DEL_MFC: + error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc)); + if (error) + break; + error = del_m6fc(&mfcc); + break; + case MRT6_DEL_MIF: + error = sooptcopyin(sopt, &mifi, sizeof(mifi), sizeof(mifi)); + if (error) + break; + error = del_m6if(&mifi); + break; + case MRT6_PIM: + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error) + break; + error = set_pim6(&optval); + break; + default: + error = EOPNOTSUPP; + break; + } + + return (error); +} + +/* + * Handle MRT getsockopt commands + */ +int +X_ip6_mrouter_get(struct socket *so, struct sockopt *sopt) +{ + int error = 0; + + if (so != V_ip6_mrouter) + return (EACCES); + + switch (sopt->sopt_name) { + case MRT6_PIM: + error = sooptcopyout(sopt, &V_pim6, sizeof(V_pim6)); + break; + } + return (error); +} + +/* + * Handle ioctl commands to obtain information from the cache + */ +int +X_mrt6_ioctl(u_long cmd, caddr_t data) +{ + int ret; + + ret = EINVAL; + + switch (cmd) { + case SIOCGETSGCNT_IN6: + ret = get_sg_cnt((struct sioc_sg_req6 *)data); + break; + + case SIOCGETMIFCNT_IN6: + ret = get_mif6_cnt((struct sioc_mif_req6 *)data); + break; + + default: + break; + } + + return (ret); +} + +/* + * returns the packet, byte, rpf-failure count for the source group provided + */ +static int +get_sg_cnt(struct sioc_sg_req6 *req) +{ + struct mf6c *rt; + int ret; + + ret = 0; + + MFC6_LOCK(); + + MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt); + if (rt == NULL) { + ret = ESRCH; + } else { + req->pktcnt = rt->mf6c_pkt_cnt; + req->bytecnt = rt->mf6c_byte_cnt; + req->wrong_if = rt->mf6c_wrong_if; + } + + MFC6_UNLOCK(); + + return (ret); +} + +/* + * returns the input and output packet and byte counts on the mif provided + */ +static int +get_mif6_cnt(struct sioc_mif_req6 *req) +{ + mifi_t mifi; + int ret; + + ret = 0; + mifi = req->mifi; + + MIF6_LOCK(); + + if (mifi >= nummifs) { + ret = EINVAL; + } else { + req->icount = mif6table[mifi].m6_pkt_in; + req->ocount = mif6table[mifi].m6_pkt_out; + req->ibytes = mif6table[mifi].m6_bytes_in; + req->obytes = mif6table[mifi].m6_bytes_out; + } + + MIF6_UNLOCK(); + + return (ret); +} + +static int +set_pim6(int *i) +{ + if ((*i != 1) && (*i != 0)) + return (EINVAL); + + V_pim6 = *i; + + return (0); +} + +/* + * Enable multicast routing + */ +static int +ip6_mrouter_init(struct socket *so, int v, int cmd) +{ + +#ifdef MRT6DEBUG + if (V_mrt6debug) + log(LOG_DEBUG, + "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n", + so->so_type, so->so_proto->pr_protocol); +#endif + + if (so->so_type != SOCK_RAW || + so->so_proto->pr_protocol != IPPROTO_ICMPV6) + return (EOPNOTSUPP); + + if (v != 1) + return (ENOPROTOOPT); + + MROUTER6_LOCK(); + + if (V_ip6_mrouter != NULL) { + MROUTER6_UNLOCK(); + return (EADDRINUSE); + } + + V_ip6_mrouter = so; + V_ip6_mrouter_ver = cmd; + + bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); + bzero((caddr_t)n6expire, sizeof(n6expire)); + + V_pim6 = 0;/* used for stubbing out/in pim stuff */ + + callout_init(&expire_upcalls_ch, 0); + callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, + expire_upcalls, NULL); + + MROUTER6_UNLOCK(); + +#ifdef MRT6DEBUG + if (V_mrt6debug) + log(LOG_DEBUG, "ip6_mrouter_init\n"); +#endif + + return (0); +} + +/* + * Disable IPv6 multicast forwarding. + */ +int +X_ip6_mrouter_done(void) +{ + mifi_t mifi; + int i; + struct mf6c *rt; + struct rtdetq *rte; + + MROUTER6_LOCK(); + + if (V_ip6_mrouter == NULL) { + MROUTER6_UNLOCK(); + return (EINVAL); + } + + /* + * For each phyint in use, disable promiscuous reception of all IPv6 + * multicasts. + */ + for (mifi = 0; mifi < nummifs; mifi++) { + if (mif6table[mifi].m6_ifp && + !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { + if_allmulti(mif6table[mifi].m6_ifp, 0); + } + } + bzero((caddr_t)mif6table, sizeof(mif6table)); + nummifs = 0; + + V_pim6 = 0; /* used to stub out/in pim specific code */ + + callout_stop(&expire_upcalls_ch); + + /* + * Free all multicast forwarding cache entries. + */ + MFC6_LOCK(); + for (i = 0; i < MF6CTBLSIZ; i++) { + rt = mf6ctable[i]; + while (rt) { + struct mf6c *frt; + + for (rte = rt->mf6c_stall; rte != NULL; ) { + struct rtdetq *n = rte->next; + + m_free(rte->m); + free(rte, M_MRTABLE6); + rte = n; + } + frt = rt; + rt = rt->mf6c_next; + free(frt, M_MRTABLE6); + } + } + bzero((caddr_t)mf6ctable, sizeof(mf6ctable)); + MFC6_UNLOCK(); + + /* + * Reset register interface + */ + if (reg_mif_num != (mifi_t)-1 && multicast_register_if6 != NULL) { + if_detach(multicast_register_if6); + if_free(multicast_register_if6); + reg_mif_num = (mifi_t)-1; + multicast_register_if6 = NULL; + } + + V_ip6_mrouter = NULL; + V_ip6_mrouter_ver = 0; + + MROUTER6_UNLOCK(); + +#ifdef MRT6DEBUG + if (V_mrt6debug) + log(LOG_DEBUG, "ip6_mrouter_done\n"); +#endif + + return (0); +} + +static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; + +/* + * Add a mif to the mif table + */ +static int +add_m6if(struct mif6ctl *mifcp) +{ + struct mif6 *mifp; + struct ifnet *ifp; + int error; + + MIF6_LOCK(); + + if (mifcp->mif6c_mifi >= MAXMIFS) { + MIF6_UNLOCK(); + return (EINVAL); + } + mifp = mif6table + mifcp->mif6c_mifi; + if (mifp->m6_ifp != NULL) { + MIF6_UNLOCK(); + return (EADDRINUSE); /* XXX: is it appropriate? */ + } + if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > V_if_index) { + MIF6_UNLOCK(); + return (ENXIO); + } + + ifp = ifnet_byindex(mifcp->mif6c_pifi); + + if (mifcp->mif6c_flags & MIFF_REGISTER) { + if (reg_mif_num == (mifi_t)-1) { + ifp = if_alloc(IFT_OTHER); + + if_initname(ifp, "register_mif", 0); + ifp->if_flags |= IFF_LOOPBACK; + if_attach(ifp); + multicast_register_if6 = ifp; + reg_mif_num = mifcp->mif6c_mifi; + /* + * it is impossible to guess the ifindex of the + * register interface. So mif6c_pifi is automatically + * calculated. + */ + mifcp->mif6c_pifi = ifp->if_index; + } else { + ifp = multicast_register_if6; + } + } else { + /* Make sure the interface supports multicast */ + if ((ifp->if_flags & IFF_MULTICAST) == 0) { + MIF6_UNLOCK(); + return (EOPNOTSUPP); + } + + error = if_allmulti(ifp, 1); + if (error) { + MIF6_UNLOCK(); + return (error); + } + } + + mifp->m6_flags = mifcp->mif6c_flags; + mifp->m6_ifp = ifp; + + /* initialize per mif pkt counters */ + mifp->m6_pkt_in = 0; + mifp->m6_pkt_out = 0; + mifp->m6_bytes_in = 0; + mifp->m6_bytes_out = 0; + bzero(&mifp->m6_route, sizeof(mifp->m6_route)); + + /* Adjust nummifs up if the mifi is higher than nummifs */ + if (nummifs <= mifcp->mif6c_mifi) + nummifs = mifcp->mif6c_mifi + 1; + + MIF6_UNLOCK(); + +#ifdef MRT6DEBUG + if (V_mrt6debug) + log(LOG_DEBUG, + "add_mif #%d, phyint %s\n", + mifcp->mif6c_mifi, + ifp->if_xname); +#endif + + return (0); +} + +/* + * Delete a mif from the mif table + */ +static int +del_m6if_locked(mifi_t *mifip) +{ + struct mif6 *mifp = mif6table + *mifip; + mifi_t mifi; + struct ifnet *ifp; + + MIF6_LOCK_ASSERT(); + + if (*mifip >= nummifs) + return (EINVAL); + if (mifp->m6_ifp == NULL) + return (EINVAL); + + if (!(mifp->m6_flags & MIFF_REGISTER)) { + /* XXX: TODO: Maintain an ALLMULTI refcount in struct ifnet. */ + ifp = mifp->m6_ifp; + if_allmulti(ifp, 0); + } else { + if (reg_mif_num != (mifi_t)-1 && + multicast_register_if6 != NULL) { + if_detach(multicast_register_if6); + if_free(multicast_register_if6); + reg_mif_num = (mifi_t)-1; + multicast_register_if6 = NULL; + } + } + + bzero((caddr_t)mifp, sizeof(*mifp)); + + /* Adjust nummifs down */ + for (mifi = nummifs; mifi > 0; mifi--) + if (mif6table[mifi - 1].m6_ifp) + break; + nummifs = mifi; + +#ifdef MRT6DEBUG + if (V_mrt6debug) + log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs); +#endif + + return (0); +} + +static int +del_m6if(mifi_t *mifip) +{ + int cc; + + MIF6_LOCK(); + cc = del_m6if_locked(mifip); + MIF6_UNLOCK(); + + return (cc); +} + +/* + * Add an mfc entry + */ +static int +add_m6fc(struct mf6cctl *mfccp) +{ + struct mf6c *rt; + u_long hash; + struct rtdetq *rte; + u_short nstl; + char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; + + MFC6_LOCK(); + + MF6CFIND(mfccp->mf6cc_origin.sin6_addr, + mfccp->mf6cc_mcastgrp.sin6_addr, rt); + + /* If an entry already exists, just update the fields */ + if (rt) { +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_MFC) { + log(LOG_DEBUG, + "add_m6fc no upcall h %d o %s g %s p %x\n", + ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), + ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), + mfccp->mf6cc_parent); + } +#endif + + rt->mf6c_parent = mfccp->mf6cc_parent; + rt->mf6c_ifset = mfccp->mf6cc_ifset; + + MFC6_UNLOCK(); + return (0); + } + + /* + * Find the entry for which the upcall was made and update + */ + hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr, + mfccp->mf6cc_mcastgrp.sin6_addr); + for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) { + if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, + &mfccp->mf6cc_origin.sin6_addr) && + IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, + &mfccp->mf6cc_mcastgrp.sin6_addr) && + (rt->mf6c_stall != NULL)) { + + if (nstl++) + log(LOG_ERR, + "add_m6fc: %s o %s g %s p %x dbx %p\n", + "multiple kernel entries", + ip6_sprintf(ip6bufo, + &mfccp->mf6cc_origin.sin6_addr), + ip6_sprintf(ip6bufg, + &mfccp->mf6cc_mcastgrp.sin6_addr), + mfccp->mf6cc_parent, rt->mf6c_stall); + +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_MFC) + log(LOG_DEBUG, + "add_m6fc o %s g %s p %x dbg %x\n", + ip6_sprintf(ip6bufo, + &mfccp->mf6cc_origin.sin6_addr), + ip6_sprintf(ip6bufg, + &mfccp->mf6cc_mcastgrp.sin6_addr), + mfccp->mf6cc_parent, rt->mf6c_stall); +#endif + + rt->mf6c_origin = mfccp->mf6cc_origin; + rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; + rt->mf6c_parent = mfccp->mf6cc_parent; + rt->mf6c_ifset = mfccp->mf6cc_ifset; + /* initialize pkt counters per src-grp */ + rt->mf6c_pkt_cnt = 0; + rt->mf6c_byte_cnt = 0; + rt->mf6c_wrong_if = 0; + + rt->mf6c_expire = 0; /* Don't clean this guy up */ + n6expire[hash]--; + + /* free packets Qed at the end of this entry */ + for (rte = rt->mf6c_stall; rte != NULL; ) { + struct rtdetq *n = rte->next; + ip6_mdq(rte->m, rte->ifp, rt); + m_freem(rte->m); +#ifdef UPCALL_TIMING + collate(&(rte->t)); +#endif /* UPCALL_TIMING */ + free(rte, M_MRTABLE6); + rte = n; + } + rt->mf6c_stall = NULL; + } + } + + /* + * It is possible that an entry is being inserted without an upcall + */ + if (nstl == 0) { +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_MFC) + log(LOG_DEBUG, + "add_mfc no upcall h %d o %s g %s p %x\n", + hash, + ip6_sprintf(ip6bufo, &mfccp->mf6cc_origin.sin6_addr), + ip6_sprintf(ip6bufg, &mfccp->mf6cc_mcastgrp.sin6_addr), + mfccp->mf6cc_parent); +#endif + + for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { + + if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr, + &mfccp->mf6cc_origin.sin6_addr)&& + IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr, + &mfccp->mf6cc_mcastgrp.sin6_addr)) { + + rt->mf6c_origin = mfccp->mf6cc_origin; + rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; + rt->mf6c_parent = mfccp->mf6cc_parent; + rt->mf6c_ifset = mfccp->mf6cc_ifset; + /* initialize pkt counters per src-grp */ + rt->mf6c_pkt_cnt = 0; + rt->mf6c_byte_cnt = 0; + rt->mf6c_wrong_if = 0; + + if (rt->mf6c_expire) + n6expire[hash]--; + rt->mf6c_expire = 0; + } + } + if (rt == NULL) { + /* no upcall, so make a new entry */ + rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, + M_NOWAIT); + if (rt == NULL) { + MFC6_UNLOCK(); + return (ENOBUFS); + } + + /* insert new entry at head of hash chain */ + rt->mf6c_origin = mfccp->mf6cc_origin; + rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp; + rt->mf6c_parent = mfccp->mf6cc_parent; + rt->mf6c_ifset = mfccp->mf6cc_ifset; + /* initialize pkt counters per src-grp */ + rt->mf6c_pkt_cnt = 0; + rt->mf6c_byte_cnt = 0; + rt->mf6c_wrong_if = 0; + rt->mf6c_expire = 0; + rt->mf6c_stall = NULL; + + /* link into table */ + rt->mf6c_next = mf6ctable[hash]; + mf6ctable[hash] = rt; + } + } + + MFC6_UNLOCK(); + return (0); +} + +#ifdef UPCALL_TIMING +/* + * collect delay statistics on the upcalls + */ +static void +collate(struct timeval *t) +{ + u_long d; + struct timeval tp; + u_long delta; + + GET_TIME(tp); + + if (TV_LT(*t, tp)) + { + TV_DELTA(tp, *t, delta); + + d = delta >> 10; + if (d > UPCALL_MAX) + d = UPCALL_MAX; + + ++upcall_data[d]; + } +} +#endif /* UPCALL_TIMING */ + +/* + * Delete an mfc entry + */ +static int +del_m6fc(struct mf6cctl *mfccp) +{ + struct sockaddr_in6 origin; + struct sockaddr_in6 mcastgrp; + struct mf6c *rt; + struct mf6c **nptr; + u_long hash; + + origin = mfccp->mf6cc_origin; + mcastgrp = mfccp->mf6cc_mcastgrp; + hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr); + +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_MFC) { + char ip6bufo[INET6_ADDRSTRLEN], ip6bufg[INET6_ADDRSTRLEN]; + log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n", + ip6_sprintf(ip6bufo, &origin.sin6_addr), + ip6_sprintf(ip6bufg, &mcastgrp.sin6_addr)); + } +#endif + + MFC6_LOCK(); + + nptr = &mf6ctable[hash]; + while ((rt = *nptr) != NULL) { + if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr, + &rt->mf6c_origin.sin6_addr) && + IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr, + &rt->mf6c_mcastgrp.sin6_addr) && + rt->mf6c_stall == NULL) + break; + + nptr = &rt->mf6c_next; + } + if (rt == NULL) { + MFC6_UNLOCK(); + return (EADDRNOTAVAIL); + } + + *nptr = rt->mf6c_next; + free(rt, M_MRTABLE6); + + MFC6_UNLOCK(); + + return (0); +} + +static int +socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src) +{ + + if (s) { + if (sbappendaddr(&s->so_rcv, + (struct sockaddr *)src, + mm, (struct mbuf *)0) != 0) { + sorwakeup(s); + return (0); + } + } + m_freem(mm); + return (-1); +} + +/* + * IPv6 multicast forwarding function. This function assumes that the packet + * pointed to by "ip6" has arrived on (or is about to be sent to) the interface + * pointed to by "ifp", and the packet is to be relayed to other networks + * that have members of the packet's destination IPv6 multicast group. + * + * The packet is returned unscathed to the caller, unless it is + * erroneous, in which case a non-zero return value tells the caller to + * discard it. + * + * NOTE: this implementation assumes that m->m_pkthdr.rcvif is NULL iff + * this function is called in the originating context (i.e., not when + * forwarding a packet from other node). ip6_output(), which is currently the + * only function that calls this function is called in the originating context, + * explicitly ensures this condition. It is caller's responsibility to ensure + * that if this function is called from somewhere else in the originating + * context in the future. + */ +int +X_ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m) +{ + struct mf6c *rt; + struct mif6 *mifp; + struct mbuf *mm; + mifi_t mifi; + char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; + +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_FORWARD) + log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n", + ip6_sprintf(ip6bufs, &ip6->ip6_src), + ip6_sprintf(ip6bufd, &ip6->ip6_dst), + ifp->if_index); +#endif + + /* + * Don't forward a packet with Hop limit of zero or one, + * or a packet destined to a local-only group. + */ + if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) || + IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) + return (0); + ip6->ip6_hlim--; + + /* + * Source address check: do not forward packets with unspecified + * source. It was discussed in July 2000, on ipngwg mailing list. + * This is rather more serious than unicast cases, because some + * MLD packets can be sent with the unspecified source address + * (although such packets must normally set 1 to the hop limit field). + */ + if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { + V_ip6stat.ip6s_cantforward++; + if (V_ip6_log_time + V_ip6_log_interval < time_second) { + V_ip6_log_time = time_second; + log(LOG_DEBUG, + "cannot forward " + "from %s to %s nxt %d received on %s\n", + ip6_sprintf(ip6bufs, &ip6->ip6_src), + ip6_sprintf(ip6bufd, &ip6->ip6_dst), + ip6->ip6_nxt, + if_name(m->m_pkthdr.rcvif)); + } + return (0); + } + + MFC6_LOCK(); + + /* + * Determine forwarding mifs from the forwarding cache table + */ + MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt); + + /* Entry exists, so forward if necessary */ + if (rt) { + MFC6_UNLOCK(); + return (ip6_mdq(m, ifp, rt)); + } else { + /* + * If we don't have a route for packet's origin, + * Make a copy of the packet & + * send message to routing daemon + */ + + struct mbuf *mb0; + struct rtdetq *rte; + u_long hash; +/* int i, npkts;*/ +#ifdef UPCALL_TIMING + struct timeval tp; + + GET_TIME(tp); +#endif /* UPCALL_TIMING */ + + mrt6stat.mrt6s_no_route++; +#ifdef MRT6DEBUG + if (V_mrt6debug & (DEBUG_FORWARD | DEBUG_MFC)) + log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n", + ip6_sprintf(ip6bufs, &ip6->ip6_src), + ip6_sprintf(ip6bufd, &ip6->ip6_dst)); +#endif + + /* + * Allocate mbufs early so that we don't do extra work if we + * are just going to fail anyway. + */ + rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE6, + M_NOWAIT); + if (rte == NULL) { + MFC6_UNLOCK(); + return (ENOBUFS); + } + mb0 = m_copy(m, 0, M_COPYALL); + /* + * Pullup packet header if needed before storing it, + * as other references may modify it in the meantime. + */ + if (mb0 && + (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr))) + mb0 = m_pullup(mb0, sizeof(struct ip6_hdr)); + if (mb0 == NULL) { + free(rte, M_MRTABLE6); + MFC6_UNLOCK(); + return (ENOBUFS); + } + + /* is there an upcall waiting for this packet? */ + hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst); + for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) { + if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, + &rt->mf6c_origin.sin6_addr) && + IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, + &rt->mf6c_mcastgrp.sin6_addr) && + (rt->mf6c_stall != NULL)) + break; + } + + if (rt == NULL) { + struct mrt6msg *im; +#ifdef MRT6_OINIT + struct omrt6msg *oim; +#endif + + /* no upcall, so make a new entry */ + rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE6, + M_NOWAIT); + if (rt == NULL) { + free(rte, M_MRTABLE6); + m_freem(mb0); + MFC6_UNLOCK(); + return (ENOBUFS); + } + /* + * Make a copy of the header to send to the user + * level process + */ + mm = m_copy(mb0, 0, sizeof(struct ip6_hdr)); + + if (mm == NULL) { + free(rte, M_MRTABLE6); + m_freem(mb0); + free(rt, M_MRTABLE6); + MFC6_UNLOCK(); + return (ENOBUFS); + } + + /* + * Send message to routing daemon + */ + sin6.sin6_addr = ip6->ip6_src; + + im = NULL; +#ifdef MRT6_OINIT + oim = NULL; +#endif + switch (V_ip6_mrouter_ver) { +#ifdef MRT6_OINIT + case MRT6_OINIT: + oim = mtod(mm, struct omrt6msg *); + oim->im6_msgtype = MRT6MSG_NOCACHE; + oim->im6_mbz = 0; + break; +#endif + case MRT6_INIT: + im = mtod(mm, struct mrt6msg *); + im->im6_msgtype = MRT6MSG_NOCACHE; + im->im6_mbz = 0; + break; + default: + free(rte, M_MRTABLE6); + m_freem(mb0); + free(rt, M_MRTABLE6); + MFC6_UNLOCK(); + return (EINVAL); + } + +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_FORWARD) + log(LOG_DEBUG, + "getting the iif info in the kernel\n"); +#endif + + for (mifp = mif6table, mifi = 0; + mifi < nummifs && mifp->m6_ifp != ifp; + mifp++, mifi++) + ; + + switch (V_ip6_mrouter_ver) { +#ifdef MRT6_OINIT + case MRT6_OINIT: + oim->im6_mif = mifi; + break; +#endif + case MRT6_INIT: + im->im6_mif = mifi; + break; + } + + if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) { + log(LOG_WARNING, "ip6_mforward: ip6_mrouter " + "socket queue full\n"); + mrt6stat.mrt6s_upq_sockfull++; + free(rte, M_MRTABLE6); + m_freem(mb0); + free(rt, M_MRTABLE6); + MFC6_UNLOCK(); + return (ENOBUFS); + } + + mrt6stat.mrt6s_upcalls++; + + /* insert new entry at head of hash chain */ + bzero(rt, sizeof(*rt)); + rt->mf6c_origin.sin6_family = AF_INET6; + rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6); + rt->mf6c_origin.sin6_addr = ip6->ip6_src; + rt->mf6c_mcastgrp.sin6_family = AF_INET6; + rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6); + rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst; + rt->mf6c_expire = UPCALL_EXPIRE; + n6expire[hash]++; + rt->mf6c_parent = MF6C_INCOMPLETE_PARENT; + + /* link into table */ + rt->mf6c_next = mf6ctable[hash]; + mf6ctable[hash] = rt; + /* Add this entry to the end of the queue */ + rt->mf6c_stall = rte; + } else { + /* determine if q has overflowed */ + struct rtdetq **p; + int npkts = 0; + + for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next) + if (++npkts > MAX_UPQ6) { + mrt6stat.mrt6s_upq_ovflw++; + free(rte, M_MRTABLE6); + m_freem(mb0); + MFC6_UNLOCK(); + return (0); + } + + /* Add this entry to the end of the queue */ + *p = rte; + } + + rte->next = NULL; + rte->m = mb0; + rte->ifp = ifp; +#ifdef UPCALL_TIMING + rte->t = tp; +#endif /* UPCALL_TIMING */ + + MFC6_UNLOCK(); + + return (0); + } +} + +/* + * Clean up cache entries if upcalls are not serviced + * Call from the Slow Timeout mechanism, every half second. + */ +static void +expire_upcalls(void *unused) +{ + struct rtdetq *rte; + struct mf6c *mfc, **nptr; + int i; + + MFC6_LOCK(); + for (i = 0; i < MF6CTBLSIZ; i++) { + if (n6expire[i] == 0) + continue; + nptr = &mf6ctable[i]; + while ((mfc = *nptr) != NULL) { + rte = mfc->mf6c_stall; + /* + * Skip real cache entries + * Make sure it wasn't marked to not expire (shouldn't happen) + * If it expires now + */ + if (rte != NULL && + mfc->mf6c_expire != 0 && + --mfc->mf6c_expire == 0) { +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_EXPIRE) { + char ip6bufo[INET6_ADDRSTRLEN]; + char ip6bufg[INET6_ADDRSTRLEN]; + log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n", + ip6_sprintf(ip6bufo, &mfc->mf6c_origin.sin6_addr), + ip6_sprintf(ip6bufg, &mfc->mf6c_mcastgrp.sin6_addr)); + } +#endif + /* + * drop all the packets + * free the mbuf with the pkt, if, timing info + */ + do { + struct rtdetq *n = rte->next; + m_freem(rte->m); + free(rte, M_MRTABLE6); + rte = n; + } while (rte != NULL); + mrt6stat.mrt6s_cache_cleanups++; + n6expire[i]--; + + *nptr = mfc->mf6c_next; + free(mfc, M_MRTABLE6); + } else { + nptr = &mfc->mf6c_next; + } + } + } + MFC6_UNLOCK(); + callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, + expire_upcalls, NULL); +} + +/* + * Packet forwarding routine once entry in the cache is made + */ +static int +ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt) +{ + struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); + mifi_t mifi, iif; + struct mif6 *mifp; + int plen = m->m_pkthdr.len; + struct in6_addr src0, dst0; /* copies for local work */ + u_int32_t iszone, idzone, oszone, odzone; + int error = 0; + +/* + * Macro to send packet on mif. Since RSVP packets don't get counted on + * input, they shouldn't get counted on output, so statistics keeping is + * separate. + */ + +#define MC6_SEND(ip6, mifp, m) do { \ + if ((mifp)->m6_flags & MIFF_REGISTER) \ + register_send((ip6), (mifp), (m)); \ + else \ + phyint_send((ip6), (mifp), (m)); \ +} while (/*CONSTCOND*/ 0) + + /* + * Don't forward if it didn't arrive from the parent mif + * for its origin. + */ + mifi = rt->mf6c_parent; + if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) { + /* came in the wrong interface */ +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_FORWARD) + log(LOG_DEBUG, + "wrong if: ifid %d mifi %d mififid %x\n", + ifp->if_index, mifi, + mif6table[mifi].m6_ifp->if_index); +#endif + mrt6stat.mrt6s_wrong_if++; + rt->mf6c_wrong_if++; + /* + * If we are doing PIM processing, and we are forwarding + * packets on this interface, send a message to the + * routing daemon. + */ + /* have to make sure this is a valid mif */ + if (mifi < nummifs && mif6table[mifi].m6_ifp) + if (V_pim6 && (m->m_flags & M_LOOP) == 0) { + /* + * Check the M_LOOP flag to avoid an + * unnecessary PIM assert. + * XXX: M_LOOP is an ad-hoc hack... + */ + static struct sockaddr_in6 sin6 = + { sizeof(sin6), AF_INET6 }; + + struct mbuf *mm; + struct mrt6msg *im; +#ifdef MRT6_OINIT + struct omrt6msg *oim; +#endif + + mm = m_copy(m, 0, sizeof(struct ip6_hdr)); + if (mm && + (M_HASCL(mm) || + mm->m_len < sizeof(struct ip6_hdr))) + mm = m_pullup(mm, sizeof(struct ip6_hdr)); + if (mm == NULL) + return (ENOBUFS); + +#ifdef MRT6_OINIT + oim = NULL; +#endif + im = NULL; + switch (V_ip6_mrouter_ver) { +#ifdef MRT6_OINIT + case MRT6_OINIT: + oim = mtod(mm, struct omrt6msg *); + oim->im6_msgtype = MRT6MSG_WRONGMIF; + oim->im6_mbz = 0; + break; +#endif + case MRT6_INIT: + im = mtod(mm, struct mrt6msg *); + im->im6_msgtype = MRT6MSG_WRONGMIF; + im->im6_mbz = 0; + break; + default: + m_freem(mm); + return (EINVAL); + } + + for (mifp = mif6table, iif = 0; + iif < nummifs && mifp && + mifp->m6_ifp != ifp; + mifp++, iif++) + ; + + switch (V_ip6_mrouter_ver) { +#ifdef MRT6_OINIT + case MRT6_OINIT: + oim->im6_mif = iif; + sin6.sin6_addr = oim->im6_src; + break; +#endif + case MRT6_INIT: + im->im6_mif = iif; + sin6.sin6_addr = im->im6_src; + break; + } + + mrt6stat.mrt6s_upcalls++; + + if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) { +#ifdef MRT6DEBUG + if (V_mrt6debug) + log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n"); +#endif + ++mrt6stat.mrt6s_upq_sockfull; + return (ENOBUFS); + } /* if socket Q full */ + } /* if PIM */ + return (0); + } /* if wrong iif */ + + /* If I sourced this packet, it counts as output, else it was input. */ + if (m->m_pkthdr.rcvif == NULL) { + /* XXX: is rcvif really NULL when output?? */ + mif6table[mifi].m6_pkt_out++; + mif6table[mifi].m6_bytes_out += plen; + } else { + mif6table[mifi].m6_pkt_in++; + mif6table[mifi].m6_bytes_in += plen; + } + rt->mf6c_pkt_cnt++; + rt->mf6c_byte_cnt += plen; + + /* + * For each mif, forward a copy of the packet if there are group + * members downstream on the interface. + */ + src0 = ip6->ip6_src; + dst0 = ip6->ip6_dst; + if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 || + (error = in6_setscope(&dst0, ifp, &idzone)) != 0) { + V_ip6stat.ip6s_badscope++; + return (error); + } + for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) { + if (IF_ISSET(mifi, &rt->mf6c_ifset)) { + /* + * check if the outgoing packet is going to break + * a scope boundary. + * XXX For packets through PIM register tunnel + * interface, we believe a routing daemon. + */ + if (!(mif6table[rt->mf6c_parent].m6_flags & + MIFF_REGISTER) && + !(mif6table[mifi].m6_flags & MIFF_REGISTER)) { + if (in6_setscope(&src0, mif6table[mifi].m6_ifp, + &oszone) || + in6_setscope(&dst0, mif6table[mifi].m6_ifp, + &odzone) || + iszone != oszone || + idzone != odzone) { + V_ip6stat.ip6s_badscope++; + continue; + } + } + + mifp->m6_pkt_out++; + mifp->m6_bytes_out += plen; + MC6_SEND(ip6, mifp, m); + } + } + return (0); +} + +static void +phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m) +{ + struct mbuf *mb_copy; + struct ifnet *ifp = mifp->m6_ifp; + int error = 0; + struct sockaddr_in6 *dst6; + u_long linkmtu; + + dst6 = &mifp->m6_route.ro_dst; + + /* + * Make a new reference to the packet; make sure that + * the IPv6 header is actually copied, not just referenced, + * so that ip6_output() only scribbles on the copy. + */ + mb_copy = m_copy(m, 0, M_COPYALL); + if (mb_copy && + (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr))) + mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr)); + if (mb_copy == NULL) { + return; + } + /* set MCAST flag to the outgoing packet */ + mb_copy->m_flags |= M_MCAST; + + /* + * If we sourced the packet, call ip6_output since we may devide + * the packet into fragments when the packet is too big for the + * outgoing interface. + * Otherwise, we can simply send the packet to the interface + * sending queue. + */ + if (m->m_pkthdr.rcvif == NULL) { + struct ip6_moptions im6o; + + im6o.im6o_multicast_ifp = ifp; + /* XXX: ip6_output will override ip6->ip6_hlim */ + im6o.im6o_multicast_hlim = ip6->ip6_hlim; + im6o.im6o_multicast_loop = 1; + error = ip6_output(mb_copy, NULL, &mifp->m6_route, + IPV6_FORWARDING, &im6o, NULL, NULL); + +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_XMIT) + log(LOG_DEBUG, "phyint_send on mif %d err %d\n", + mifp - mif6table, error); +#endif + return; + } + + /* + * If configured to loop back multicasts by default, + * loop back a copy now. + */ + if (in6_mcast_loop) { + dst6->sin6_len = sizeof(struct sockaddr_in6); + dst6->sin6_family = AF_INET6; + dst6->sin6_addr = ip6->ip6_dst; + ip6_mloopback(ifp, m, &mifp->m6_route.ro_dst); + } + + /* + * Put the packet into the sending queue of the outgoing interface + * if it would fit in the MTU of the interface. + */ + linkmtu = IN6_LINKMTU(ifp); + if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) { + dst6->sin6_len = sizeof(struct sockaddr_in6); + dst6->sin6_family = AF_INET6; + dst6->sin6_addr = ip6->ip6_dst; + /* + * We just call if_output instead of nd6_output here, since + * we need no ND for a multicast forwarded packet...right? + */ + error = (*ifp->if_output)(ifp, mb_copy, + (struct sockaddr *)&mifp->m6_route.ro_dst, NULL); +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_XMIT) + log(LOG_DEBUG, "phyint_send on mif %d err %d\n", + mifp - mif6table, error); +#endif + } else { + /* + * pMTU discovery is intentionally disabled by default, since + * various router may notify pMTU in multicast, which can be + * a DDoS to a router + */ + if (V_ip6_mcast_pmtu) + icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu); + else { +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_XMIT) { + char ip6bufs[INET6_ADDRSTRLEN]; + char ip6bufd[INET6_ADDRSTRLEN]; + log(LOG_DEBUG, + "phyint_send: packet too big on %s o %s " + "g %s size %d(discarded)\n", + if_name(ifp), + ip6_sprintf(ip6bufs, &ip6->ip6_src), + ip6_sprintf(ip6bufd, &ip6->ip6_dst), + mb_copy->m_pkthdr.len); + } +#endif /* MRT6DEBUG */ + m_freem(mb_copy); /* simply discard the packet */ + } + } +} + +static int +register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m) +{ + struct mbuf *mm; + int i, len = m->m_pkthdr.len; + static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 }; + struct mrt6msg *im6; + +#ifdef MRT6DEBUG + if (V_mrt6debug) { + char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; + log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n", + ip6_sprintf(ip6bufs, &ip6->ip6_src), + ip6_sprintf(ip6bufd, &ip6->ip6_dst)); + } +#endif + ++pim6stat.pim6s_snd_registers; + + /* Make a copy of the packet to send to the user level process */ + MGETHDR(mm, M_DONTWAIT, MT_HEADER); + if (mm == NULL) + return (ENOBUFS); + mm->m_pkthdr.rcvif = NULL; + mm->m_data += max_linkhdr; + mm->m_len = sizeof(struct ip6_hdr); + + if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { + m_freem(mm); + return (ENOBUFS); + } + i = MHLEN - M_LEADINGSPACE(mm); + if (i > len) + i = len; + mm = m_pullup(mm, i); + if (mm == NULL) + return (ENOBUFS); +/* TODO: check it! */ + mm->m_pkthdr.len = len + sizeof(struct ip6_hdr); + + /* + * Send message to routing daemon + */ + sin6.sin6_addr = ip6->ip6_src; + + im6 = mtod(mm, struct mrt6msg *); + im6->im6_msgtype = MRT6MSG_WHOLEPKT; + im6->im6_mbz = 0; + + im6->im6_mif = mif - mif6table; + + /* iif info is not given for reg. encap.n */ + mrt6stat.mrt6s_upcalls++; + + if (socket_send(V_ip6_mrouter, mm, &sin6) < 0) { +#ifdef MRT6DEBUG + if (V_mrt6debug) + log(LOG_WARNING, + "register_send: ip6_mrouter socket queue full\n"); +#endif + ++mrt6stat.mrt6s_upq_sockfull; + return (ENOBUFS); + } + return (0); +} + +/* + * pim6_encapcheck() is called by the encap6_input() path at runtime to + * determine if a packet is for PIM; allowing PIM to be dynamically loaded + * into the kernel. + */ +static int +pim6_encapcheck(const struct mbuf *m, int off, int proto, void *arg) +{ + +#ifdef DIAGNOSTIC + KASSERT(proto == IPPROTO_PIM, ("not for IPPROTO_PIM")); +#endif + if (proto != IPPROTO_PIM) + return 0; /* not for us; reject the datagram. */ + + return 64; /* claim the datagram. */ +} + +/* + * PIM sparse mode hook + * Receives the pim control messages, and passes them up to the listening + * socket, using rip6_input. + * The only message processed is the REGISTER pim message; the pim header + * is stripped off, and the inner packet is passed to register_mforward. + */ +int +pim6_input(struct mbuf **mp, int *offp, int proto) +{ + struct pim *pim; /* pointer to a pim struct */ + struct ip6_hdr *ip6; + int pimlen; + struct mbuf *m = *mp; + int minlen; + int off = *offp; + + ++pim6stat.pim6s_rcv_total; + + ip6 = mtod(m, struct ip6_hdr *); + pimlen = m->m_pkthdr.len - *offp; + + /* + * Validate lengths + */ + if (pimlen < PIM_MINLEN) { + ++pim6stat.pim6s_rcv_tooshort; +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_PIM) + log(LOG_DEBUG,"pim6_input: PIM packet too short\n"); +#endif + m_freem(m); + return (IPPROTO_DONE); + } + + /* + * if the packet is at least as big as a REGISTER, go ahead + * and grab the PIM REGISTER header size, to avoid another + * possible m_pullup() later. + * + * PIM_MINLEN == pimhdr + u_int32 == 8 + * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40 + */ + minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN; + + /* + * Make sure that the IP6 and PIM headers in contiguous memory, and + * possibly the PIM REGISTER header + */ +#ifndef PULLDOWN_TEST + IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE); + /* adjust pointer */ + ip6 = mtod(m, struct ip6_hdr *); + + /* adjust mbuf to point to the PIM header */ + pim = (struct pim *)((caddr_t)ip6 + off); +#else + IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen); + if (pim == NULL) { + pim6stat.pim6s_rcv_tooshort++; + return (IPPROTO_DONE); + } +#endif + +#define PIM6_CHECKSUM +#ifdef PIM6_CHECKSUM + { + int cksumlen; + + /* + * Validate checksum. + * If PIM REGISTER, exclude the data packet + */ + if (pim->pim_type == PIM_REGISTER) + cksumlen = PIM_MINLEN; + else + cksumlen = pimlen; + + if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) { + ++pim6stat.pim6s_rcv_badsum; +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_PIM) + log(LOG_DEBUG, + "pim6_input: invalid checksum\n"); +#endif + m_freem(m); + return (IPPROTO_DONE); + } + } +#endif /* PIM_CHECKSUM */ + + /* PIM version check */ + if (pim->pim_ver != PIM_VERSION) { + ++pim6stat.pim6s_rcv_badversion; +#ifdef MRT6DEBUG + log(LOG_ERR, + "pim6_input: incorrect version %d, expecting %d\n", + pim->pim_ver, PIM_VERSION); +#endif + m_freem(m); + return (IPPROTO_DONE); + } + + if (pim->pim_type == PIM_REGISTER) { + /* + * since this is a REGISTER, we'll make a copy of the register + * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the + * routing daemon. + */ + static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 }; + + struct mbuf *mcp; + struct ip6_hdr *eip6; + u_int32_t *reghdr; + int rc; +#ifdef MRT6DEBUG + char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; +#endif + + ++pim6stat.pim6s_rcv_registers; + + if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) { +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_PIM) + log(LOG_DEBUG, + "pim6_input: register mif not set: %d\n", + reg_mif_num); +#endif + m_freem(m); + return (IPPROTO_DONE); + } + + reghdr = (u_int32_t *)(pim + 1); + + if ((ntohl(*reghdr) & PIM_NULL_REGISTER)) + goto pim6_input_to_daemon; + + /* + * Validate length + */ + if (pimlen < PIM6_REG_MINLEN) { + ++pim6stat.pim6s_rcv_tooshort; + ++pim6stat.pim6s_rcv_badregisters; +#ifdef MRT6DEBUG + log(LOG_ERR, + "pim6_input: register packet size too " + "small %d from %s\n", + pimlen, ip6_sprintf(ip6bufs, &ip6->ip6_src)); +#endif + m_freem(m); + return (IPPROTO_DONE); + } + + eip6 = (struct ip6_hdr *) (reghdr + 1); +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_PIM) + log(LOG_DEBUG, + "pim6_input[register], eip6: %s -> %s, " + "eip6 plen %d\n", + ip6_sprintf(ip6bufs, &eip6->ip6_src), + ip6_sprintf(ip6bufd, &eip6->ip6_dst), + ntohs(eip6->ip6_plen)); +#endif + + /* verify the version number of the inner packet */ + if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { + ++pim6stat.pim6s_rcv_badregisters; +#ifdef MRT6DEBUG + log(LOG_DEBUG, "pim6_input: invalid IP version (%d) " + "of the inner packet\n", + (eip6->ip6_vfc & IPV6_VERSION)); +#endif + m_freem(m); + return (IPPROTO_NONE); + } + + /* verify the inner packet is destined to a mcast group */ + if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) { + ++pim6stat.pim6s_rcv_badregisters; +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_PIM) + log(LOG_DEBUG, + "pim6_input: inner packet of register " + "is not multicast %s\n", + ip6_sprintf(ip6bufd, &eip6->ip6_dst)); +#endif + m_freem(m); + return (IPPROTO_DONE); + } + + /* + * make a copy of the whole header to pass to the daemon later. + */ + mcp = m_copy(m, 0, off + PIM6_REG_MINLEN); + if (mcp == NULL) { +#ifdef MRT6DEBUG + log(LOG_ERR, + "pim6_input: pim register: " + "could not copy register head\n"); +#endif + m_freem(m); + return (IPPROTO_DONE); + } + + /* + * forward the inner ip6 packet; point m_data at the inner ip6. + */ + m_adj(m, off + PIM_MINLEN); +#ifdef MRT6DEBUG + if (V_mrt6debug & DEBUG_PIM) { + log(LOG_DEBUG, + "pim6_input: forwarding decapsulated register: " + "src %s, dst %s, mif %d\n", + ip6_sprintf(ip6bufs, &eip6->ip6_src), + ip6_sprintf(ip6bufd, &eip6->ip6_dst), + reg_mif_num); + } +#endif + + rc = if_simloop(mif6table[reg_mif_num].m6_ifp, m, + dst.sin6_family, 0); + + /* prepare the register head to send to the mrouting daemon */ + m = mcp; + } + + /* + * Pass the PIM message up to the daemon; if it is a register message + * pass the 'head' only up to the daemon. This includes the + * encapsulator ip6 header, pim header, register header and the + * encapsulated ip6 header. + */ + pim6_input_to_daemon: + rip6_input(&m, offp, proto); + return (IPPROTO_DONE); +} + +static int +ip6_mroute_modevent(module_t mod, int type, void *unused) +{ + + switch (type) { + case MOD_LOAD: + MROUTER6_LOCK_INIT(); + MFC6_LOCK_INIT(); + MIF6_LOCK_INIT(); + + pim6_encap_cookie = encap_attach_func(AF_INET6, IPPROTO_PIM, + pim6_encapcheck, + (const struct protosw *)&in6_pim_protosw, NULL); + if (pim6_encap_cookie == NULL) { + printf("ip6_mroute: unable to attach pim6 encap\n"); + MIF6_LOCK_DESTROY(); + MFC6_LOCK_DESTROY(); + MROUTER6_LOCK_DESTROY(); + return (EINVAL); + } + + ip6_mforward = X_ip6_mforward; + ip6_mrouter_done = X_ip6_mrouter_done; + ip6_mrouter_get = X_ip6_mrouter_get; + ip6_mrouter_set = X_ip6_mrouter_set; + mrt6_ioctl = X_mrt6_ioctl; + break; + + case MOD_UNLOAD: + if (V_ip6_mrouter != NULL) + return EINVAL; + + if (pim6_encap_cookie) { + encap_detach(pim6_encap_cookie); + pim6_encap_cookie = NULL; + } + X_ip6_mrouter_done(); + ip6_mforward = NULL; + ip6_mrouter_done = NULL; + ip6_mrouter_get = NULL; + ip6_mrouter_set = NULL; + mrt6_ioctl = NULL; + + MIF6_LOCK_DESTROY(); + MFC6_LOCK_DESTROY(); + MROUTER6_LOCK_DESTROY(); + break; + + default: + return (EOPNOTSUPP); + } + + return (0); +} + +static moduledata_t ip6_mroutemod = { + "ip6_mroute", + ip6_mroute_modevent, + 0 +}; + +DECLARE_MODULE(ip6_mroute, ip6_mroutemod, SI_SUB_PSEUDO, SI_ORDER_ANY); -- cgit v1.2.3