diff options
author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-10-09 22:42:09 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-10-10 09:06:58 +0200 |
commit | bceabc95c1c85d793200446fa85f1ddc6313ea29 (patch) | |
tree | 973c8bd8deca9fd69913f2895cc91e0e6114d46c /freebsd/sys/netinet6/sctp6_usrreq.c | |
parent | Add FreeBSD sources as a submodule (diff) | |
download | rtems-libbsd-bceabc95c1c85d793200446fa85f1ddc6313ea29.tar.bz2 |
Move files to match FreeBSD layout
Diffstat (limited to 'freebsd/sys/netinet6/sctp6_usrreq.c')
-rw-r--r-- | freebsd/sys/netinet6/sctp6_usrreq.c | 1319 |
1 files changed, 1319 insertions, 0 deletions
diff --git a/freebsd/sys/netinet6/sctp6_usrreq.c b/freebsd/sys/netinet6/sctp6_usrreq.c new file mode 100644 index 00000000..178f0d84 --- /dev/null +++ b/freebsd/sys/netinet6/sctp6_usrreq.c @@ -0,0 +1,1319 @@ +#include <freebsd/machine/rtems-bsd-config.h> + +/*- + * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * a) Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * b) 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. + * + * c) Neither the name of Cisco Systems, Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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: sctp6_usrreq.c,v 1.38 2005/08/24 08:08:56 suz Exp $ */ + +#include <freebsd/sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <freebsd/netinet/sctp_os.h> +#include <freebsd/sys/proc.h> +#include <freebsd/netinet/sctp_pcb.h> +#include <freebsd/netinet/sctp_header.h> +#include <freebsd/netinet/sctp_var.h> +#if defined(INET6) +#include <freebsd/netinet6/sctp6_var.h> +#endif +#include <freebsd/netinet/sctp_sysctl.h> +#include <freebsd/netinet/sctp_output.h> +#include <freebsd/netinet/sctp_uio.h> +#include <freebsd/netinet/sctp_asconf.h> +#include <freebsd/netinet/sctputil.h> +#include <freebsd/netinet/sctp_indata.h> +#include <freebsd/netinet/sctp_timer.h> +#include <freebsd/netinet/sctp_auth.h> +#include <freebsd/netinet/sctp_input.h> +#include <freebsd/netinet/sctp_output.h> +#include <freebsd/netinet/sctp_bsd_addr.h> +#include <freebsd/netinet/sctp_crc32.h> +#include <freebsd/netinet/udp.h> + +#ifdef IPSEC +#include <freebsd/netipsec/ipsec.h> +#if defined(INET6) +#include <freebsd/netipsec/ipsec6.h> +#endif /* INET6 */ +#endif /* IPSEC */ + +extern struct protosw inetsw[]; + +int +sctp6_input(struct mbuf **i_pak, int *offp, int proto) +{ + struct mbuf *m; + struct ip6_hdr *ip6; + struct sctphdr *sh; + struct sctp_inpcb *in6p = NULL; + struct sctp_nets *net; + int refcount_up = 0; + uint32_t vrf_id = 0; + +#ifdef IPSEC + struct inpcb *in6p_ip; + +#endif + struct sctp_chunkhdr *ch; + int length, offset, iphlen; + uint8_t ecn_bits; + struct sctp_tcb *stcb = NULL; + int pkt_len = 0; + +#if !defined(SCTP_WITH_NO_CSUM) + uint32_t check, calc_check; + +#endif + int off = *offp; + uint16_t port = 0; + + /* get the VRF and table id's */ + if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { + SCTP_RELEASE_PKT(*i_pak); + return (-1); + } + m = SCTP_HEADER_TO_CHAIN(*i_pak); + pkt_len = SCTP_HEADER_LEN((*i_pak)); + +#ifdef SCTP_PACKET_LOGGING + sctp_packet_log(m, pkt_len); +#endif + ip6 = mtod(m, struct ip6_hdr *); + /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ + IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, + (int)(sizeof(*sh) + sizeof(*ch))); + if (sh == NULL) { + SCTP_STAT_INCR(sctps_hdrops); + return IPPROTO_DONE; + } + ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); + iphlen = off; + offset = iphlen + sizeof(*sh) + sizeof(*ch); + SCTPDBG(SCTP_DEBUG_INPUT1, + "sctp6_input() length:%d iphlen:%d\n", pkt_len, iphlen); + + +#if defined(NFAITH) && NFAITH > 0 + + if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { + /* XXX send icmp6 host/port unreach? */ + goto bad; + } +#endif /* NFAITH defined and > 0 */ + SCTP_STAT_INCR(sctps_recvpackets); + SCTP_STAT_INCR_COUNTER64(sctps_inpackets); + SCTPDBG(SCTP_DEBUG_INPUT1, "V6 input gets a packet iphlen:%d pktlen:%d\n", + iphlen, pkt_len); + if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { + /* No multi-cast support in SCTP */ + goto bad; + } + /* destination port of 0 is illegal, based on RFC2960. */ + if (sh->dest_port == 0) + goto bad; + + SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, + "sctp_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", + m->m_pkthdr.len, + if_name(m->m_pkthdr.rcvif), + m->m_pkthdr.csum_flags); +#if defined(SCTP_WITH_NO_CSUM) + SCTP_STAT_INCR(sctps_recvnocrc); +#else + if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { + SCTP_STAT_INCR(sctps_recvhwcrc); + goto sctp_skip_csum; + } + check = sh->checksum; /* save incoming checksum */ + if ((check == 0) && (SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback)) && + (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst))) { + SCTP_STAT_INCR(sctps_recvnocrc); + goto sctp_skip_csum; + } + sh->checksum = 0; /* prepare for calc */ + calc_check = sctp_calculate_cksum(m, iphlen); + SCTP_STAT_INCR(sctps_recvswcrc); + if (calc_check != check) { + SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p phlen:%d\n", + calc_check, check, m, iphlen); + stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), + sh, ch, &in6p, &net, vrf_id); + if ((net) && (port)) { + if (net->port == 0) { + sctp_pathmtu_adjustment(in6p, stcb, net, net->mtu - sizeof(struct udphdr)); + } + net->port = port; + } + /* in6p's ref-count increased && stcb locked */ + if ((in6p) && (stcb)) { + sctp_send_packet_dropped(stcb, net, m, iphlen, 1); + sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED); + } else if ((in6p != NULL) && (stcb == NULL)) { + refcount_up = 1; + } + SCTP_STAT_INCR(sctps_badsum); + SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); + goto bad; + } + sh->checksum = calc_check; + +sctp_skip_csum: +#endif + net = NULL; + /* + * Locate pcb and tcb for datagram sctp_findassociation_addr() wants + * IP/SCTP/first chunk header... + */ + stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), + sh, ch, &in6p, &net, vrf_id); + if ((net) && (port)) { + if (net->port == 0) { + sctp_pathmtu_adjustment(in6p, stcb, net, net->mtu - sizeof(struct udphdr)); + } + net->port = port; + } + /* in6p's ref-count increased */ + if (in6p == NULL) { + struct sctp_init_chunk *init_chk, chunk_buf; + + SCTP_STAT_INCR(sctps_noport); + if (ch->chunk_type == SCTP_INITIATION) { + /* + * we do a trick here to get the INIT tag, dig in + * and get the tag from the INIT and put it in the + * common header. + */ + init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, + iphlen + sizeof(*sh), sizeof(*init_chk), + (uint8_t *) & chunk_buf); + if (init_chk) + sh->v_tag = init_chk->init.initiate_tag; + else + sh->v_tag = 0; + } + if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { + sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id, port); + goto bad; + } + if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { + goto bad; + } + if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) + sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id, port); + goto bad; + } else if (stcb == NULL) { + refcount_up = 1; + } +#ifdef IPSEC + /* + * Check AH/ESP integrity. + */ + in6p_ip = (struct inpcb *)in6p; + if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { +/* XXX */ + MODULE_GLOBAL(ipsec6stat).in_polvio++; + goto bad; + } +#endif /* IPSEC */ + + /* + * CONTROL chunk processing + */ + offset -= sizeof(*ch); + ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); + + /* Length now holds the total packet length payload + iphlen */ + length = ntohs(ip6->ip6_plen) + iphlen; + + /* sa_ignore NO_NULL_CHK */ + sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, + in6p, stcb, net, ecn_bits, vrf_id, port); + /* inp's ref-count reduced && stcb unlocked */ + /* XXX this stuff below gets moved to appropriate parts later... */ + if (m) + sctp_m_freem(m); + if ((in6p) && refcount_up) { + /* reduce ref-count */ + SCTP_INP_WLOCK(in6p); + SCTP_INP_DECR_REF(in6p); + SCTP_INP_WUNLOCK(in6p); + } + return IPPROTO_DONE; + +bad: + if (stcb) { + SCTP_TCB_UNLOCK(stcb); + } + if ((in6p) && refcount_up) { + /* reduce ref-count */ + SCTP_INP_WLOCK(in6p); + SCTP_INP_DECR_REF(in6p); + SCTP_INP_WUNLOCK(in6p); + } + if (m) + sctp_m_freem(m); + return IPPROTO_DONE; +} + + +static void +sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, + struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) +{ + uint32_t nxtsz; + + if ((inp == NULL) || (stcb == NULL) || (net == NULL) || + (icmp6 == NULL) || (sh == NULL)) { + goto out; + } + /* First do we even look at it? */ + if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) + goto out; + + if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { + /* not PACKET TO BIG */ + goto out; + } + /* + * ok we need to look closely. We could even get smarter and look at + * anyone that we sent to in case we get a different ICMP that tells + * us there is no way to reach a host, but for this impl, all we + * care about is MTU discovery. + */ + nxtsz = ntohl(icmp6->icmp6_mtu); + /* Stop any PMTU timer */ + sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); + + /* Adjust destination size limit */ + if (net->mtu > nxtsz) { + net->mtu = nxtsz; + if (net->port) { + net->mtu -= sizeof(struct udphdr); + } + } + /* now what about the ep? */ + if (stcb->asoc.smallest_mtu > nxtsz) { + struct sctp_tmit_chunk *chk; + + /* Adjust that too */ + stcb->asoc.smallest_mtu = nxtsz; + /* now off to subtract IP_DF flag if needed */ + + TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { + if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + } + } + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { + /* + * For this guy we also mark for immediate + * resend since we sent to big of chunk + */ + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + if (chk->sent != SCTP_DATAGRAM_RESEND) + stcb->asoc.sent_queue_retran_cnt++; + chk->sent = SCTP_DATAGRAM_RESEND; + chk->rec.data.doing_fast_retransmit = 0; + + chk->sent = SCTP_DATAGRAM_RESEND; + /* Clear any time so NO RTT is being done */ + chk->sent_rcv_time.tv_sec = 0; + chk->sent_rcv_time.tv_usec = 0; + stcb->asoc.total_flight -= chk->send_size; + net->flight_size -= chk->send_size; + } + } + } + sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); +out: + if (stcb) { + SCTP_TCB_UNLOCK(stcb); + } +} + + +void +sctp6_notify(struct sctp_inpcb *inp, + struct icmp6_hdr *icmph, + struct sctphdr *sh, + struct sockaddr *to, + struct sctp_tcb *stcb, + struct sctp_nets *net) +{ +#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + struct socket *so; + +#endif + /* protection */ + int reason; + + + if ((inp == NULL) || (stcb == NULL) || (net == NULL) || + (sh == NULL) || (to == NULL)) { + if (stcb) + SCTP_TCB_UNLOCK(stcb); + return; + } + /* First job is to verify the vtag matches what I would send */ + if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { + SCTP_TCB_UNLOCK(stcb); + return; + } + if (icmph->icmp6_type != ICMP_UNREACH) { + /* We only care about unreachable */ + SCTP_TCB_UNLOCK(stcb); + return; + } + if ((icmph->icmp6_code == ICMP_UNREACH_NET) || + (icmph->icmp6_code == ICMP_UNREACH_HOST) || + (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || + (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || + (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || + (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || + (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || + (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { + + /* + * Hmm reachablity problems we must examine closely. If its + * not reachable, we may have lost a network. Or if there is + * NO protocol at the other end named SCTP. well we consider + * it a OOTB abort. + */ + if (net->dest_state & SCTP_ADDR_REACHABLE) { + /* Ok that destination is NOT reachable */ + SCTP_PRINTF("ICMP (thresh %d/%d) takes interface %p down\n", + net->error_count, + net->failure_threshold, + net); + + net->dest_state &= ~SCTP_ADDR_REACHABLE; + net->dest_state |= SCTP_ADDR_NOT_REACHABLE; + /* + * JRS 5/14/07 - If a destination is unreachable, + * the PF bit is turned off. This allows an + * unambiguous use of the PF bit for destinations + * that are reachable but potentially failed. If the + * destination is set to the unreachable state, also + * set the destination to the PF state. + */ + /* + * Add debug message here if destination is not in + * PF state. + */ + /* Stop any running T3 timers here? */ + if ((stcb->asoc.sctp_cmt_on_off == 1) && + (stcb->asoc.sctp_cmt_pf > 0)) { + net->dest_state &= ~SCTP_ADDR_PF; + SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from PF to unreachable.\n", + net); + } + net->error_count = net->failure_threshold + 1; + sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, + stcb, SCTP_FAILED_THRESHOLD, + (void *)net, SCTP_SO_NOT_LOCKED); + } + SCTP_TCB_UNLOCK(stcb); + } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || + (icmph->icmp6_code == ICMP_UNREACH_PORT)) { + /* + * Here the peer is either playing tricks on us, including + * an address that belongs to someone who does not support + * SCTP OR was a userland implementation that shutdown and + * now is dead. In either case treat it like a OOTB abort + * with no TCB + */ + reason = SCTP_PEER_FAULTY; + sctp_abort_notification(stcb, reason, SCTP_SO_NOT_LOCKED); +#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + so = SCTP_INP_SO(inp); + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); +#endif + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); +#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) + SCTP_SOCKET_UNLOCK(so, 1); + /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ +#endif + /* no need to unlock here, since the TCB is gone */ + } else { + SCTP_TCB_UNLOCK(stcb); + } +} + + + +void +sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) +{ + struct sctphdr sh; + struct ip6ctlparam *ip6cp = NULL; + uint32_t vrf_id; + + vrf_id = SCTP_DEFAULT_VRFID; + + if (pktdst->sa_family != AF_INET6 || + pktdst->sa_len != sizeof(struct sockaddr_in6)) + return; + + if ((unsigned)cmd >= PRC_NCMDS) + return; + if (PRC_IS_REDIRECT(cmd)) { + d = NULL; + } else if (inet6ctlerrmap[cmd] == 0) { + return; + } + /* if the parameter is from icmp6, decode it. */ + if (d != NULL) { + ip6cp = (struct ip6ctlparam *)d; + } else { + ip6cp = (struct ip6ctlparam *)NULL; + } + + if (ip6cp) { + /* + * XXX: We assume that when IPV6 is non NULL, M and OFF are + * valid. + */ + /* check if we can safely examine src and dst ports */ + struct sctp_inpcb *inp = NULL; + struct sctp_tcb *stcb = NULL; + struct sctp_nets *net = NULL; + struct sockaddr_in6 final; + + if (ip6cp->ip6c_m == NULL) + return; + + bzero(&sh, sizeof(sh)); + bzero(&final, sizeof(final)); + inp = NULL; + net = NULL; + m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), + (caddr_t)&sh); + ip6cp->ip6c_src->sin6_port = sh.src_port; + final.sin6_len = sizeof(final); + final.sin6_family = AF_INET6; + final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; + final.sin6_port = sh.dest_port; + stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, + (struct sockaddr *)&final, + &inp, &net, 1, vrf_id); + /* inp's ref-count increased && stcb locked */ + if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { + if (cmd == PRC_MSGSIZE) { + sctp6_notify_mbuf(inp, + ip6cp->ip6c_icmp6, + &sh, + stcb, + net); + /* inp's ref-count reduced && stcb unlocked */ + } else { + sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, + (struct sockaddr *)&final, + stcb, net); + /* inp's ref-count reduced && stcb unlocked */ + } + } else { + if (PRC_IS_REDIRECT(cmd) && inp) { + in6_rtchange((struct in6pcb *)inp, + inet6ctlerrmap[cmd]); + } + if (inp) { + /* reduce inp's ref-count */ + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } + if (stcb) + SCTP_TCB_UNLOCK(stcb); + } + } +} + +/* + * this routine can probably be collasped into the one in sctp_userreq.c + * since they do the same thing and now we lookup with a sockaddr + */ +static int +sctp6_getcred(SYSCTL_HANDLER_ARGS) +{ + struct xucred xuc; + struct sockaddr_in6 addrs[2]; + struct sctp_inpcb *inp; + struct sctp_nets *net; + struct sctp_tcb *stcb; + int error; + uint32_t vrf_id; + + vrf_id = SCTP_DEFAULT_VRFID; + + error = priv_check(req->td, PRIV_NETINET_GETCRED); + if (error) + return (error); + + if (req->newlen != sizeof(addrs)) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + if (req->oldlen != sizeof(struct ucred)) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + error = SYSCTL_IN(req, addrs, sizeof(addrs)); + if (error) + return (error); + + stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), + sin6tosa(&addrs[1]), + &inp, &net, 1, vrf_id); + if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { + if ((inp != NULL) && (stcb == NULL)) { + /* reduce ref-count */ + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + goto cred_can_cont; + } + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + error = ENOENT; + goto out; + } + SCTP_TCB_UNLOCK(stcb); + /* + * We use the write lock here, only since in the error leg we need + * it. If we used RLOCK, then we would have to + * wlock/decr/unlock/rlock. Which in theory could create a hole. + * Better to use higher wlock. + */ + SCTP_INP_WLOCK(inp); +cred_can_cont: + error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); + if (error) { + SCTP_INP_WUNLOCK(inp); + goto out; + } + cru2x(inp->sctp_socket->so_cred, &xuc); + SCTP_INP_WUNLOCK(inp); + error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); +out: + return (error); +} + +SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, + 0, 0, + sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); + + +/* This is the same as the sctp_abort() could be made common */ +static void +sctp6_abort(struct socket *so) +{ + struct sctp_inpcb *inp; + uint32_t flags; + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == 0) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return; + } +sctp_must_try_again: + flags = inp->sctp_flags; +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 17); +#endif + if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && + (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 16); +#endif + sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, + SCTP_CALLED_AFTER_CMPSET_OFCLOSE); + SOCK_LOCK(so); + SCTP_SB_CLEAR(so->so_snd); + /* + * same for the rcv ones, they are only here for the + * accounting/select. + */ + SCTP_SB_CLEAR(so->so_rcv); + /* Now null out the reference, we are completely detached. */ + so->so_pcb = NULL; + SOCK_UNLOCK(so); + } else { + flags = inp->sctp_flags; + if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { + goto sctp_must_try_again; + } + } + return; +} + +static int +sctp6_attach(struct socket *so, int proto, struct thread *p) +{ + struct in6pcb *inp6; + int error; + struct sctp_inpcb *inp; + uint32_t vrf_id = SCTP_DEFAULT_VRFID; + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp != NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { + error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); + if (error) + return error; + } + error = sctp_inpcb_alloc(so, vrf_id); + if (error) + return error; + inp = (struct sctp_inpcb *)so->so_pcb; + SCTP_INP_WLOCK(inp); + inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ + inp6 = (struct in6pcb *)inp; + + inp6->inp_vflag |= INP_IPV6; + inp6->in6p_hops = -1; /* use kernel default */ + inp6->in6p_cksum = -1; /* just to be sure */ +#ifdef INET + /* + * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 + * socket as well, because the socket may be bound to an IPv6 + * wildcard address, which may match an IPv4-mapped IPv6 address. + */ + inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); +#endif + /* + * Hmm what about the IPSEC stuff that is missing here but in + * sctp_attach()? + */ + SCTP_INP_WUNLOCK(inp); + return 0; +} + +static int +sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) +{ + struct sctp_inpcb *inp; + struct in6pcb *inp6; + int error; + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == 0) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + if (addr) { + if ((addr->sa_family == AF_INET6) && + (addr->sa_len != sizeof(struct sockaddr_in6))) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + if ((addr->sa_family == AF_INET) && + (addr->sa_len != sizeof(struct sockaddr_in))) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + } + inp6 = (struct in6pcb *)inp; + inp6->inp_vflag &= ~INP_IPV4; + inp6->inp_vflag |= INP_IPV6; + if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { + if (addr->sa_family == AF_INET) { + /* binding v4 addr to v6 socket, so reset flags */ + inp6->inp_vflag |= INP_IPV4; + inp6->inp_vflag &= ~INP_IPV6; + } else { + struct sockaddr_in6 *sin6_p; + + sin6_p = (struct sockaddr_in6 *)addr; + + if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { + inp6->inp_vflag |= INP_IPV4; + } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { + struct sockaddr_in sin; + + in6_sin6_2_sin(&sin, sin6_p); + inp6->inp_vflag |= INP_IPV4; + inp6->inp_vflag &= ~INP_IPV6; + error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); + return error; + } + } + } else if (addr != NULL) { + /* IPV6_V6ONLY socket */ + if (addr->sa_family == AF_INET) { + /* can't bind v4 addr to v6 only socket! */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } else { + struct sockaddr_in6 *sin6_p; + + sin6_p = (struct sockaddr_in6 *)addr; + + if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { + /* can't bind v4-mapped addrs either! */ + /* NOTE: we don't support SIIT */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + } + } + error = sctp_inpcb_bind(so, addr, NULL, p); + return error; +} + + +static void +sctp6_close(struct socket *so) +{ + sctp_close(so); +} + +/* This could be made common with sctp_detach() since they are identical */ + +static +int +sctp6_disconnect(struct socket *so) +{ + return (sctp_disconnect(so)); +} + + +int +sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct thread *p); + + +static int +sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct thread *p) +{ + struct sctp_inpcb *inp; + struct in6pcb *inp6; + +#ifdef INET + struct sockaddr_in6 *sin6; + +#endif /* INET */ + /* No SPL needed since sctp_output does this */ + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + if (control) { + SCTP_RELEASE_PKT(control); + control = NULL; + } + SCTP_RELEASE_PKT(m); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + inp6 = (struct in6pcb *)inp; + /* + * For the TCP model we may get a NULL addr, if we are a connected + * socket thats ok. + */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && + (addr == NULL)) { + goto connected_type; + } + if (addr == NULL) { + SCTP_RELEASE_PKT(m); + if (control) { + SCTP_RELEASE_PKT(control); + control = NULL; + } + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); + return (EDESTADDRREQ); + } +#ifdef INET + sin6 = (struct sockaddr_in6 *)addr; + if (SCTP_IPV6_V6ONLY(inp6)) { + /* + * if IPV6_V6ONLY flag, we discard datagrams destined to a + * v4 addr or v4-mapped addr + */ + if (addr->sa_family == AF_INET) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + if (!MODULE_GLOBAL(ip6_v6only)) { + struct sockaddr_in sin; + + /* convert v4-mapped into v4 addr and send */ + in6_sin6_2_sin(&sin, sin6); + return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, + control, p); + } else { + /* mapped addresses aren't enabled */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + } +#endif /* INET */ +connected_type: + /* now what about control */ + if (control) { + if (inp->control) { + SCTP_PRINTF("huh? control set?\n"); + SCTP_RELEASE_PKT(inp->control); + inp->control = NULL; + } + inp->control = control; + } + /* Place the data */ + if (inp->pkt) { + SCTP_BUF_NEXT(inp->pkt_last) = m; + inp->pkt_last = m; + } else { + inp->pkt_last = inp->pkt = m; + } + if ( + /* FreeBSD and MacOSX uses a flag passed */ + ((flags & PRUS_MORETOCOME) == 0) + ) { + /* + * note with the current version this code will only be used + * by OpenBSD, NetBSD and FreeBSD have methods for + * re-defining sosend() to use sctp_sosend(). One can + * optionaly switch back to this code (by changing back the + * defininitions but this is not advisable. + */ + int ret; + + ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); + inp->pkt = NULL; + inp->control = NULL; + return (ret); + } else { + return (0); + } +} + +static int +sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) +{ + uint32_t vrf_id; + int error = 0; + struct sctp_inpcb *inp; + struct in6pcb *inp6; + struct sctp_tcb *stcb; + +#ifdef INET + struct sockaddr_in6 *sin6; + struct sockaddr_storage ss; + +#endif /* INET */ + + inp6 = (struct in6pcb *)so->so_pcb; + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == 0) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); + return (ECONNRESET); /* I made the same as TCP since we are + * not setup? */ + } + if (addr == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + if ((addr->sa_family == AF_INET6) && (addr->sa_len != sizeof(struct sockaddr_in6))) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + if ((addr->sa_family == AF_INET) && (addr->sa_len != sizeof(struct sockaddr_in))) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + vrf_id = inp->def_vrf_id; + SCTP_ASOC_CREATE_LOCK(inp); + SCTP_INP_RLOCK(inp); + if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == + SCTP_PCB_FLAGS_UNBOUND) { + /* Bind a ephemeral port */ + SCTP_INP_RUNLOCK(inp); + error = sctp6_bind(so, NULL, p); + if (error) { + SCTP_ASOC_CREATE_UNLOCK(inp); + + return (error); + } + SCTP_INP_RLOCK(inp); + } + if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && + (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { + /* We are already connected AND the TCP model */ + SCTP_INP_RUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); + return (EADDRINUSE); + } +#ifdef INET + sin6 = (struct sockaddr_in6 *)addr; + if (SCTP_IPV6_V6ONLY(inp6)) { + /* + * if IPV6_V6ONLY flag, ignore connections destined to a v4 + * addr or v4-mapped addr + */ + if (addr->sa_family == AF_INET) { + SCTP_INP_RUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + SCTP_INP_RUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + if (!MODULE_GLOBAL(ip6_v6only)) { + /* convert v4-mapped into v4 addr */ + in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); + addr = (struct sockaddr *)&ss; + } else { + /* mapped addresses aren't enabled */ + SCTP_INP_RUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + } else +#endif /* INET */ + addr = addr; /* for true v6 address case */ + + /* Now do we connect? */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb) { + SCTP_TCB_UNLOCK(stcb); + } + SCTP_INP_RUNLOCK(inp); + } else { + SCTP_INP_RUNLOCK(inp); + SCTP_INP_WLOCK(inp); + SCTP_INP_INCR_REF(inp); + SCTP_INP_WUNLOCK(inp); + stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); + if (stcb == NULL) { + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } + } + + if (stcb != NULL) { + /* Already have or am bring up an association */ + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_TCB_UNLOCK(stcb); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); + return (EALREADY); + } + /* We are GOOD to go */ + stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); + SCTP_ASOC_CREATE_UNLOCK(inp); + if (stcb == NULL) { + /* Gak! no memory */ + return (error); + } + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { + stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; + /* Set the connected flag so we can queue data */ + soisconnecting(so); + } + stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; + (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); + + /* initialize authentication parameters for the assoc */ + sctp_initialize_auth_params(inp, stcb); + + sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); + SCTP_TCB_UNLOCK(stcb); + return error; +} + +static int +sctp6_getaddr(struct socket *so, struct sockaddr **addr) +{ + struct sockaddr_in6 *sin6; + struct sctp_inpcb *inp; + uint32_t vrf_id; + struct sctp_ifa *sctp_ifa; + + int error; + + /* + * Do the malloc first in case it blocks. + */ + SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); + if (sin6 == NULL) + return ENOMEM; + sin6->sin6_family = AF_INET6; + sin6->sin6_len = sizeof(*sin6); + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + SCTP_FREE_SONAME(sin6); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); + return ECONNRESET; + } + SCTP_INP_RLOCK(inp); + sin6->sin6_port = inp->sctp_lport; + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + /* For the bound all case you get back 0 */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { + struct sctp_tcb *stcb; + struct sockaddr_in6 *sin_a6; + struct sctp_nets *net; + int fnd; + + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb == NULL) { + goto notConn6; + } + fnd = 0; + sin_a6 = NULL; + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; + if (sin_a6 == NULL) + /* this will make coverity happy */ + continue; + + if (sin_a6->sin6_family == AF_INET6) { + fnd = 1; + break; + } + } + if ((!fnd) || (sin_a6 == NULL)) { + /* punt */ + goto notConn6; + } + vrf_id = inp->def_vrf_id; + sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); + if (sctp_ifa) { + sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; + } + } else { + /* For the bound all case you get back 0 */ + notConn6: + memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); + } + } else { + /* Take the first IPv6 address in the list */ + struct sctp_laddr *laddr; + int fnd = 0; + + LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa->address.sa.sa_family == AF_INET6) { + struct sockaddr_in6 *sin_a; + + sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; + sin6->sin6_addr = sin_a->sin6_addr; + fnd = 1; + break; + } + } + if (!fnd) { + SCTP_FREE_SONAME(sin6); + SCTP_INP_RUNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + return ENOENT; + } + } + SCTP_INP_RUNLOCK(inp); + /* Scoping things for v6 */ + if ((error = sa6_recoverscope(sin6)) != 0) { + SCTP_FREE_SONAME(sin6); + return (error); + } + (*addr) = (struct sockaddr *)sin6; + return (0); +} + +static int +sctp6_peeraddr(struct socket *so, struct sockaddr **addr) +{ + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; + int fnd; + struct sockaddr_in6 *sin_a6; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; + struct sctp_nets *net; + + int error; + + /* + * Do the malloc first in case it blocks. + */ + inp = (struct sctp_inpcb *)so->so_pcb; + if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { + /* UDP type and listeners will drop out here */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); + return (ENOTCONN); + } + SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); + if (sin6 == NULL) + return (ENOMEM); + sin6->sin6_family = AF_INET6; + sin6->sin6_len = sizeof(*sin6); + + /* We must recapture incase we blocked */ + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + SCTP_FREE_SONAME(sin6); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); + return ECONNRESET; + } + SCTP_INP_RLOCK(inp); + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb) { + SCTP_TCB_LOCK(stcb); + } + SCTP_INP_RUNLOCK(inp); + if (stcb == NULL) { + SCTP_FREE_SONAME(sin6); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); + return ECONNRESET; + } + fnd = 0; + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; + if (sin_a6->sin6_family == AF_INET6) { + fnd = 1; + sin6->sin6_port = stcb->rport; + sin6->sin6_addr = sin_a6->sin6_addr; + break; + } + } + SCTP_TCB_UNLOCK(stcb); + if (!fnd) { + /* No IPv4 address */ + SCTP_FREE_SONAME(sin6); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + return ENOENT; + } + if ((error = sa6_recoverscope(sin6)) != 0) + return (error); + *addr = (struct sockaddr *)sin6; + return (0); +} + +static int +sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) +{ + struct sockaddr *addr; + struct in6pcb *inp6 = sotoin6pcb(so); + int error; + + if (inp6 == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + /* allow v6 addresses precedence */ + error = sctp6_getaddr(so, nam); + if (error) { + /* try v4 next if v6 failed */ + error = sctp_ingetaddr(so, nam); + if (error) { + return (error); + } + addr = *nam; + /* if I'm V6ONLY, convert it to v4-mapped */ + if (SCTP_IPV6_V6ONLY(inp6)) { + struct sockaddr_in6 sin6; + + in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); + memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); + + } + } + return (error); +} + + +static int +sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) +{ + struct sockaddr *addr = *nam; + struct in6pcb *inp6 = sotoin6pcb(so); + int error; + + if (inp6 == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return EINVAL; + } + /* allow v6 addresses precedence */ + error = sctp6_peeraddr(so, nam); + if (error) { + /* try v4 next if v6 failed */ + error = sctp_peeraddr(so, nam); + if (error) { + return (error); + } + /* if I'm V6ONLY, convert it to v4-mapped */ + if (SCTP_IPV6_V6ONLY(inp6)) { + struct sockaddr_in6 sin6; + + in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); + memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); + } + } + return error; +} + +struct pr_usrreqs sctp6_usrreqs = { + .pru_abort = sctp6_abort, + .pru_accept = sctp_accept, + .pru_attach = sctp6_attach, + .pru_bind = sctp6_bind, + .pru_connect = sctp6_connect, + .pru_control = in6_control, + .pru_close = sctp6_close, + .pru_detach = sctp6_close, + .pru_sopoll = sopoll_generic, + .pru_flush = sctp_flush, + .pru_disconnect = sctp6_disconnect, + .pru_listen = sctp_listen, + .pru_peeraddr = sctp6_getpeeraddr, + .pru_send = sctp6_send, + .pru_shutdown = sctp_shutdown, + .pru_sockaddr = sctp6_in6getaddr, + .pru_sosend = sctp_sosend, + .pru_soreceive = sctp_soreceive +}; 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