sctp6_usrreq.c revision 293897
155714Skris/*- 255714Skris * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 355714Skris * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 455714Skris * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 555714Skris * 655714Skris * Redistribution and use in source and binary forms, with or without 755714Skris * modification, are permitted provided that the following conditions are met: 8280304Sjkim * 955714Skris * a) Redistributions of source code must retain the above copyright notice, 1055714Skris * this list of conditions and the following disclaimer. 1155714Skris * 1255714Skris * b) Redistributions in binary form must reproduce the above copyright 1355714Skris * notice, this list of conditions and the following disclaimer in 1455714Skris * the documentation and/or other materials provided with the distribution. 15280304Sjkim * 1655714Skris * c) Neither the name of Cisco Systems, Inc. nor the names of its 1755714Skris * contributors may be used to endorse or promote products derived 1855714Skris * from this software without specific prior written permission. 1955714Skris * 2055714Skris * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2155714Skris * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22280304Sjkim * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2355714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 2455714Skris * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2555714Skris * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2655714Skris * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2755714Skris * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2855714Skris * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2955714Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 3055714Skris * THE POSSIBILITY OF SUCH DAMAGE. 3155714Skris */ 3255714Skris 3355714Skris#include <sys/cdefs.h> 3455714Skris__FBSDID("$FreeBSD: stable/10/sys/netinet6/sctp6_usrreq.c 293897 2016-01-14 09:11:42Z glebius $"); 3555714Skris 3655714Skris#include <netinet/sctp_os.h> 37280304Sjkim#ifdef INET6 3855714Skris#include <sys/proc.h> 3955714Skris#include <netinet/sctp_pcb.h> 40280304Sjkim#include <netinet/sctp_header.h> 4155714Skris#include <netinet/sctp_var.h> 4255714Skris#ifdef INET6 4355714Skris#include <netinet6/sctp6_var.h> 4455714Skris#endif 4555714Skris#include <netinet/sctp_sysctl.h> 4655714Skris#include <netinet/sctp_output.h> 4755714Skris#include <netinet/sctp_uio.h> 4855714Skris#include <netinet/sctp_asconf.h> 4955714Skris#include <netinet/sctputil.h> 5055714Skris#include <netinet/sctp_indata.h> 5155714Skris#include <netinet/sctp_timer.h> 52280304Sjkim#include <netinet/sctp_auth.h> 5355714Skris#include <netinet/sctp_input.h> 5455714Skris#include <netinet/sctp_output.h> 5555714Skris#include <netinet/sctp_bsd_addr.h> 5655714Skris#include <netinet/sctp_crc32.h> 5755714Skris#include <netinet/udp.h> 5855714Skris 5955714Skris#ifdef IPSEC 6055714Skris#include <netipsec/ipsec.h> 6155714Skris#ifdef INET6 6255714Skris#include <netipsec/ipsec6.h> 6355714Skris#endif /* INET6 */ 6455714Skris#endif /* IPSEC */ 6568651Skris 6668651Skrisextern struct protosw inetsw[]; 67215697Ssimon 68280304Sjkimint 69280304Sjkimsctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 70280304Sjkim{ 7168651Skris struct mbuf *m; 7255714Skris int iphlen; 7355714Skris uint32_t vrf_id; 74280304Sjkim uint8_t ecn_bits; 75280304Sjkim struct sockaddr_in6 src, dst; 76280304Sjkim struct ip6_hdr *ip6; 77280304Sjkim struct sctphdr *sh; 78280304Sjkim struct sctp_chunkhdr *ch; 79280304Sjkim int length, offset; 8055714Skris 81280304Sjkim#if !defined(SCTP_WITH_NO_CSUM) 82280304Sjkim uint8_t compute_crc; 83280304Sjkim 84280304Sjkim#endif 85280304Sjkim uint32_t mflowid; 86280304Sjkim uint8_t mflowtype; 87280304Sjkim uint16_t fibnum; 88280304Sjkim 89280304Sjkim iphlen = *offp; 90280304Sjkim if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 91280304Sjkim SCTP_RELEASE_PKT(*i_pak); 92280304Sjkim return (IPPROTO_DONE); 93280304Sjkim } 94280304Sjkim m = SCTP_HEADER_TO_CHAIN(*i_pak); 95280304Sjkim#ifdef SCTP_MBUF_LOGGING 9655714Skris /* Log in any input mbufs */ 97280304Sjkim if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 98280304Sjkim sctp_log_mbc(m, SCTP_MBUF_INPUT); 99280304Sjkim } 100280304Sjkim#endif 101280304Sjkim#ifdef SCTP_PACKET_LOGGING 102280304Sjkim if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 103280304Sjkim sctp_packet_log(m); 104280304Sjkim } 105280304Sjkim#endif 106280304Sjkim SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 107280304Sjkim "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 10855714Skris m->m_pkthdr.len, 10955714Skris if_name(m->m_pkthdr.rcvif), 110280304Sjkim (int)m->m_pkthdr.csum_flags, CSUM_BITS); 111280304Sjkim mflowid = m->m_pkthdr.flowid; 112280304Sjkim mflowtype = M_HASHTYPE_GET(m); 11355714Skris fibnum = M_GETFIB(m); 11455714Skris SCTP_STAT_INCR(sctps_recvpackets); 115280304Sjkim SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 116280304Sjkim /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 11755714Skris offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 118280304Sjkim ip6 = mtod(m, struct ip6_hdr *); 119280304Sjkim IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 120280304Sjkim (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 12155714Skris if (sh == NULL) { 122280304Sjkim SCTP_STAT_INCR(sctps_hdrops); 123280304Sjkim return (IPPROTO_DONE); 124280304Sjkim } 125280304Sjkim ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 126280304Sjkim offset -= sizeof(struct sctp_chunkhdr); 127280304Sjkim memset(&src, 0, sizeof(struct sockaddr_in6)); 128280304Sjkim src.sin6_family = AF_INET6; 12955714Skris src.sin6_len = sizeof(struct sockaddr_in6); 130280304Sjkim src.sin6_port = sh->src_port; 131280304Sjkim src.sin6_addr = ip6->ip6_src; 132280304Sjkim if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 133280304Sjkim goto out; 134280304Sjkim } 135280304Sjkim memset(&dst, 0, sizeof(struct sockaddr_in6)); 13655714Skris dst.sin6_family = AF_INET6; 13755714Skris dst.sin6_len = sizeof(struct sockaddr_in6); 138280304Sjkim dst.sin6_port = sh->dest_port; 139280304Sjkim dst.sin6_addr = ip6->ip6_dst; 140280304Sjkim if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 141280304Sjkim goto out; 142280304Sjkim } 143280304Sjkim if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) { 144280304Sjkim /* XXX send icmp6 host/port unreach? */ 145280304Sjkim goto out; 146280304Sjkim } 147280304Sjkim length = ntohs(ip6->ip6_plen) + iphlen; 14855714Skris /* Validate mbuf chain length with IP payload length. */ 149280304Sjkim if (SCTP_HEADER_LEN(m) != length) { 150280304Sjkim SCTPDBG(SCTP_DEBUG_INPUT1, 151280304Sjkim "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 152280304Sjkim SCTP_STAT_INCR(sctps_hdrops); 15355714Skris goto out; 154280304Sjkim } 155280304Sjkim if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 156280304Sjkim goto out; 15755714Skris } 158280304Sjkim ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 159280304Sjkim#if defined(SCTP_WITH_NO_CSUM) 16055714Skris SCTP_STAT_INCR(sctps_recvnocrc); 161280304Sjkim#else 162215697Ssimon if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 163280304Sjkim SCTP_STAT_INCR(sctps_recvhwcrc); 164280304Sjkim compute_crc = 0; 165280304Sjkim } else { 166280304Sjkim SCTP_STAT_INCR(sctps_recvswcrc); 167280304Sjkim compute_crc = 1; 168280304Sjkim } 169280304Sjkim#endif 17055714Skris sctp_common_input_processing(&m, iphlen, offset, length, 171280304Sjkim (struct sockaddr *)&src, 172280304Sjkim (struct sockaddr *)&dst, 173280304Sjkim sh, ch, 174280304Sjkim#if !defined(SCTP_WITH_NO_CSUM) 175280304Sjkim compute_crc, 176280304Sjkim#endif 177280304Sjkim ecn_bits, 178280304Sjkim mflowtype, mflowid, fibnum, 179280304Sjkim vrf_id, port); 180280304Sjkimout: 181280304Sjkim if (m) { 182280304Sjkim sctp_m_freem(m); 183280304Sjkim } 184280304Sjkim return (IPPROTO_DONE); 185280304Sjkim} 186280304Sjkim 187280304Sjkim 18855714Skrisint 189280304Sjkimsctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 190280304Sjkim{ 191280304Sjkim return (sctp6_input_with_port(i_pak, offp, 0)); 192280304Sjkim} 19355714Skris 194280304Sjkimstatic void 195280304Sjkimsctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 196280304Sjkim struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 197280304Sjkim{ 198120631Snectar uint32_t nxtsz; 199280304Sjkim 200280304Sjkim if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 20155714Skris (icmp6 == NULL) || (sh == NULL)) { 202280304Sjkim goto out; 203280304Sjkim } 20455714Skris /* First do we even look at it? */ 205280304Sjkim if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 206280304Sjkim goto out; 207280304Sjkim 208280304Sjkim if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 209280304Sjkim /* not PACKET TO BIG */ 210280304Sjkim goto out; 211280304Sjkim } 212280304Sjkim /* 213280304Sjkim * ok we need to look closely. We could even get smarter and look at 214280304Sjkim * anyone that we sent to in case we get a different ICMP that tells 215280304Sjkim * us there is no way to reach a host, but for this impl, all we 216280304Sjkim * care about is MTU discovery. 217280304Sjkim */ 218280304Sjkim nxtsz = ntohl(icmp6->icmp6_mtu); 219280304Sjkim /* Stop any PMTU timer */ 220280304Sjkim sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, 22155714Skris SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 222280304Sjkim 223280304Sjkim /* Adjust destination size limit */ 224280304Sjkim if (net->mtu > nxtsz) { 225280304Sjkim net->mtu = nxtsz; 226280304Sjkim if (net->port) { 227280304Sjkim net->mtu -= sizeof(struct udphdr); 228280304Sjkim } 229280304Sjkim } 230280304Sjkim /* now what about the ep? */ 231280304Sjkim if (stcb->asoc.smallest_mtu > nxtsz) { 232280304Sjkim struct sctp_tmit_chunk *chk; 233280304Sjkim 234280304Sjkim /* Adjust that too */ 23555714Skris stcb->asoc.smallest_mtu = nxtsz; 236280304Sjkim /* now off to subtract IP_DF flag if needed */ 237280304Sjkim 238280304Sjkim TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 239280304Sjkim if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 240280304Sjkim chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 241280304Sjkim } 242280304Sjkim } 243280304Sjkim TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 244280304Sjkim if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 245280304Sjkim /* 24655714Skris * For this guy we also mark for immediate 247280304Sjkim * resend since we sent to big of chunk 248280304Sjkim */ 249280304Sjkim chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 250280304Sjkim if (chk->sent != SCTP_DATAGRAM_RESEND) 251280304Sjkim stcb->asoc.sent_queue_retran_cnt++; 252280304Sjkim chk->sent = SCTP_DATAGRAM_RESEND; 253280304Sjkim chk->rec.data.doing_fast_retransmit = 0; 254280304Sjkim 255280304Sjkim chk->sent = SCTP_DATAGRAM_RESEND; 256280304Sjkim /* Clear any time so NO RTT is being done */ 257280304Sjkim chk->sent_rcv_time.tv_sec = 0; 258280304Sjkim chk->sent_rcv_time.tv_usec = 0; 259280304Sjkim stcb->asoc.total_flight -= chk->send_size; 260280304Sjkim net->flight_size -= chk->send_size; 261280304Sjkim } 262280304Sjkim } 263280304Sjkim } 264280304Sjkim sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 265280304Sjkimout: 26655714Skris if (stcb) { 267280304Sjkim SCTP_TCB_UNLOCK(stcb); 268280304Sjkim } 269280304Sjkim} 270280304Sjkim 271280304Sjkim 272280304Sjkimvoid 273280304Sjkimsctp6_notify(struct sctp_inpcb *inp, 274280304Sjkim struct icmp6_hdr *icmph, 275280304Sjkim struct sctphdr *sh, 276280304Sjkim struct sockaddr *to, 277280304Sjkim struct sctp_tcb *stcb, 278280304Sjkim struct sctp_nets *net) 279280304Sjkim{ 280280304Sjkim#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 281280304Sjkim struct socket *so; 282280304Sjkim 283280304Sjkim#endif 284280304Sjkim 285280304Sjkim /* protection */ 286280304Sjkim if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 287280304Sjkim (sh == NULL) || (to == NULL)) { 288280304Sjkim if (stcb) 289280304Sjkim SCTP_TCB_UNLOCK(stcb); 290280304Sjkim return; 291280304Sjkim } 292280304Sjkim /* First job is to verify the vtag matches what I would send */ 293280304Sjkim if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 294280304Sjkim SCTP_TCB_UNLOCK(stcb); 295280304Sjkim return; 296280304Sjkim } 29755714Skris if (icmph->icmp6_type != ICMP_UNREACH) { 298280304Sjkim /* We only care about unreachable */ 299280304Sjkim SCTP_TCB_UNLOCK(stcb); 30055714Skris return; 301215697Ssimon } 302280304Sjkim if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 303215697Ssimon (icmph->icmp6_code == ICMP_UNREACH_HOST) || 304280304Sjkim (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 305215697Ssimon (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 306280304Sjkim (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 307280304Sjkim (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 308280304Sjkim (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 309280304Sjkim (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 310280304Sjkim 311280304Sjkim /* 312280304Sjkim * Hmm reachablity problems we must examine closely. If its 313280304Sjkim * not reachable, we may have lost a network. Or if there is 314280304Sjkim * NO protocol at the other end named SCTP. well we consider 315280304Sjkim * it a OOTB abort. 316280304Sjkim */ 317280304Sjkim if (net->dest_state & SCTP_ADDR_REACHABLE) { 318280304Sjkim /* Ok that destination is NOT reachable */ 319280304Sjkim net->dest_state &= ~SCTP_ADDR_REACHABLE; 320280304Sjkim net->dest_state &= ~SCTP_ADDR_PF; 321280304Sjkim sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 322280304Sjkim stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 323280304Sjkim } 324280304Sjkim SCTP_TCB_UNLOCK(stcb); 325280304Sjkim } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 326280304Sjkim (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 327280304Sjkim /* 328280304Sjkim * Here the peer is either playing tricks on us, including 329280304Sjkim * an address that belongs to someone who does not support 330280304Sjkim * SCTP OR was a userland implementation that shutdown and 331280304Sjkim * now is dead. In either case treat it like a OOTB abort 332280304Sjkim * with no TCB 333280304Sjkim */ 334280304Sjkim sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 335280304Sjkim#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 336280304Sjkim so = SCTP_INP_SO(inp); 337280304Sjkim atomic_add_int(&stcb->asoc.refcnt, 1); 338280304Sjkim SCTP_TCB_UNLOCK(stcb); 33955714Skris SCTP_SOCKET_LOCK(so, 1); 340280304Sjkim SCTP_TCB_LOCK(stcb); 341280304Sjkim atomic_subtract_int(&stcb->asoc.refcnt, 1); 342280304Sjkim#endif 343280304Sjkim (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 34455714Skris SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 345280304Sjkim#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 346280304Sjkim SCTP_SOCKET_UNLOCK(so, 1); 347280304Sjkim /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 348280304Sjkim#endif 349280304Sjkim /* no need to unlock here, since the TCB is gone */ 350280304Sjkim } else { 351280304Sjkim SCTP_TCB_UNLOCK(stcb); 352280304Sjkim } 353280304Sjkim} 354280304Sjkim 355280304Sjkim 356280304Sjkim 357280304Sjkimvoid 358280304Sjkimsctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 35955714Skris{ 36068651Skris struct sctphdr sh; 361280304Sjkim struct ip6ctlparam *ip6cp = NULL; 362280304Sjkim uint32_t vrf_id; 363280304Sjkim 364280304Sjkim vrf_id = SCTP_DEFAULT_VRFID; 365280304Sjkim 36655714Skris if (pktdst->sa_family != AF_INET6 || 367280304Sjkim pktdst->sa_len != sizeof(struct sockaddr_in6)) 368280304Sjkim return; 36955714Skris 370280304Sjkim if ((unsigned)cmd >= PRC_NCMDS) 371280304Sjkim return; 372280304Sjkim if (PRC_IS_REDIRECT(cmd)) { 373280304Sjkim d = NULL; 374280304Sjkim } else if (inet6ctlerrmap[cmd] == 0) { 375280304Sjkim return; 376280304Sjkim } 37755714Skris /* if the parameter is from icmp6, decode it. */ 378280304Sjkim if (d != NULL) { 379280304Sjkim ip6cp = (struct ip6ctlparam *)d; 380280304Sjkim } else { 381280304Sjkim ip6cp = (struct ip6ctlparam *)NULL; 382280304Sjkim } 383280304Sjkim 384280304Sjkim if (ip6cp) { 385280304Sjkim /* 386280304Sjkim * XXX: We assume that when IPV6 is non NULL, M and OFF are 387280304Sjkim * valid. 388280304Sjkim */ 389280304Sjkim struct sctp_inpcb *inp = NULL; 390280304Sjkim struct sctp_tcb *stcb = NULL; 391280304Sjkim struct sctp_nets *net = NULL; 392280304Sjkim struct sockaddr_in6 final; 393280304Sjkim 394280304Sjkim if (ip6cp->ip6c_m == NULL) 395280304Sjkim return; 396280304Sjkim 39755714Skris /* Check if we can safely examine the SCTP header. */ 398280304Sjkim if (ip6cp->ip6c_m->m_pkthdr.len < ip6cp->ip6c_off + sizeof(sh)) 399280304Sjkim return; 40055714Skris 401280304Sjkim bzero(&sh, sizeof(sh)); 402280304Sjkim bzero(&final, sizeof(final)); 40355714Skris inp = NULL; 404280304Sjkim net = NULL; 405280304Sjkim m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 406280304Sjkim (caddr_t)&sh); 407280304Sjkim ip6cp->ip6c_src->sin6_port = sh.src_port; 408280304Sjkim final.sin6_len = sizeof(final); 409280304Sjkim final.sin6_family = AF_INET6; 410280304Sjkim final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 411280304Sjkim final.sin6_port = sh.dest_port; 412280304Sjkim stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 413280304Sjkim (struct sockaddr *)ip6cp->ip6c_src, 414280304Sjkim &inp, &net, 1, vrf_id); 415280304Sjkim /* inp's ref-count increased && stcb locked */ 416280304Sjkim if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 417280304Sjkim if (cmd == PRC_MSGSIZE) { 418280304Sjkim sctp6_notify_mbuf(inp, 419280304Sjkim ip6cp->ip6c_icmp6, 420280304Sjkim &sh, 421280304Sjkim stcb, 422280304Sjkim net); 423280304Sjkim /* inp's ref-count reduced && stcb unlocked */ 424280304Sjkim } else { 425280304Sjkim sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 426280304Sjkim (struct sockaddr *)&final, 427280304Sjkim stcb, net); 428280304Sjkim /* inp's ref-count reduced && stcb unlocked */ 429280304Sjkim } 430280304Sjkim } else { 431280304Sjkim if (PRC_IS_REDIRECT(cmd) && inp) { 432280304Sjkim in6_rtchange((struct in6pcb *)inp, 433280304Sjkim inet6ctlerrmap[cmd]); 434280304Sjkim } 435280304Sjkim if (inp) { 436280304Sjkim /* reduce inp's ref-count */ 437280304Sjkim SCTP_INP_WLOCK(inp); 438280304Sjkim SCTP_INP_DECR_REF(inp); 439280304Sjkim SCTP_INP_WUNLOCK(inp); 440280304Sjkim } 441280304Sjkim if (stcb) 442280304Sjkim SCTP_TCB_UNLOCK(stcb); 443280304Sjkim } 444280304Sjkim } 445280304Sjkim} 446280304Sjkim 447280304Sjkim/* 448280304Sjkim * this routine can probably be collasped into the one in sctp_userreq.c 449280304Sjkim * since they do the same thing and now we lookup with a sockaddr 450280304Sjkim */ 451280304Sjkimstatic int 452280304Sjkimsctp6_getcred(SYSCTL_HANDLER_ARGS) 45355714Skris{ 454280304Sjkim struct xucred xuc; 455280304Sjkim struct sockaddr_in6 addrs[2]; 456280304Sjkim struct sctp_inpcb *inp; 457280304Sjkim struct sctp_nets *net; 458280304Sjkim struct sctp_tcb *stcb; 459280304Sjkim int error; 460280304Sjkim uint32_t vrf_id; 461280304Sjkim 462280304Sjkim vrf_id = SCTP_DEFAULT_VRFID; 463280304Sjkim 464280304Sjkim error = priv_check(req->td, PRIV_NETINET_GETCRED); 465280304Sjkim if (error) 466280304Sjkim return (error); 467280304Sjkim 468280304Sjkim if (req->newlen != sizeof(addrs)) { 469280304Sjkim SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 470280304Sjkim return (EINVAL); 471280304Sjkim } 472280304Sjkim if (req->oldlen != sizeof(struct ucred)) { 47355714Skris SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 47468651Skris return (EINVAL); 475280304Sjkim } 476280304Sjkim error = SYSCTL_IN(req, addrs, sizeof(addrs)); 477280304Sjkim if (error) 478280304Sjkim return (error); 47955714Skris 480280304Sjkim stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 48155714Skris sin6tosa(&addrs[0]), 482280304Sjkim &inp, &net, 1, vrf_id); 483280304Sjkim if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 484280304Sjkim if ((inp != NULL) && (stcb == NULL)) { 485280304Sjkim /* reduce ref-count */ 486280304Sjkim SCTP_INP_WLOCK(inp); 487280304Sjkim SCTP_INP_DECR_REF(inp); 488280304Sjkim goto cred_can_cont; 489280304Sjkim } 490280304Sjkim SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 491280304Sjkim error = ENOENT; 492280304Sjkim goto out; 493280304Sjkim } 494280304Sjkim SCTP_TCB_UNLOCK(stcb); 495280304Sjkim /* 496280304Sjkim * We use the write lock here, only since in the error leg we need 497280304Sjkim * it. If we used RLOCK, then we would have to 498280304Sjkim * wlock/decr/unlock/rlock. Which in theory could create a hole. 499280304Sjkim * Better to use higher wlock. 500280304Sjkim */ 501280304Sjkim SCTP_INP_WLOCK(inp); 502280304Sjkimcred_can_cont: 503280304Sjkim error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 504280304Sjkim if (error) { 505280304Sjkim SCTP_INP_WUNLOCK(inp); 506280304Sjkim goto out; 507280304Sjkim } 508280304Sjkim cru2x(inp->sctp_socket->so_cred, &xuc); 509280304Sjkim SCTP_INP_WUNLOCK(inp); 510280304Sjkim error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 511280304Sjkimout: 512280304Sjkim return (error); 513280304Sjkim} 514280304Sjkim 515280304SjkimSYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 516280304Sjkim 0, 0, 517280304Sjkim sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 518280304Sjkim 519280304Sjkim 520280304Sjkim/* This is the same as the sctp_abort() could be made common */ 521280304Sjkimstatic void 522280304Sjkimsctp6_abort(struct socket *so) 523280304Sjkim{ 524280304Sjkim struct sctp_inpcb *inp; 525280304Sjkim uint32_t flags; 526280304Sjkim 527280304Sjkim inp = (struct sctp_inpcb *)so->so_pcb; 528280304Sjkim if (inp == NULL) { 529280304Sjkim SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 530280304Sjkim return; 531280304Sjkim } 532280304Sjkimsctp_must_try_again: 533280304Sjkim flags = inp->sctp_flags; 534280304Sjkim#ifdef SCTP_LOG_CLOSING 535280304Sjkim sctp_log_closing(inp, NULL, 17); 536280304Sjkim#endif 53755714Skris if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 538280304Sjkim (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 539280304Sjkim#ifdef SCTP_LOG_CLOSING 540280304Sjkim sctp_log_closing(inp, NULL, 16); 541280304Sjkim#endif 542280304Sjkim sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 54355714Skris SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 544280304Sjkim SOCK_LOCK(so); 545280304Sjkim SCTP_SB_CLEAR(so->so_snd); 546280304Sjkim /* 547280304Sjkim * same for the rcv ones, they are only here for the 548280304Sjkim * accounting/select. 549280304Sjkim */ 550280304Sjkim SCTP_SB_CLEAR(so->so_rcv); 551280304Sjkim /* Now null out the reference, we are completely detached. */ 552280304Sjkim so->so_pcb = NULL; 553280304Sjkim SOCK_UNLOCK(so); 554280304Sjkim } else { 55555714Skris flags = inp->sctp_flags; 55668651Skris if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 557280304Sjkim goto sctp_must_try_again; 558280304Sjkim } 55959191Skris } 560280304Sjkim return; 561280304Sjkim} 562280304Sjkim 563280304Sjkimstatic int 564280304Sjkimsctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 565280304Sjkim{ 566280304Sjkim struct in6pcb *inp6; 567280304Sjkim int error; 568280304Sjkim struct sctp_inpcb *inp; 56959191Skris uint32_t vrf_id = SCTP_DEFAULT_VRFID; 570215697Ssimon 571280304Sjkim inp = (struct sctp_inpcb *)so->so_pcb; 572280304Sjkim if (inp != NULL) { 573280304Sjkim SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 574 return (EINVAL); 575 } 576 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 577 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 578 if (error) 579 return (error); 580 } 581 error = sctp_inpcb_alloc(so, vrf_id); 582 if (error) 583 return (error); 584 inp = (struct sctp_inpcb *)so->so_pcb; 585 SCTP_INP_WLOCK(inp); 586 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 587 inp6 = (struct in6pcb *)inp; 588 589 inp6->inp_vflag |= INP_IPV6; 590 inp6->in6p_hops = -1; /* use kernel default */ 591 inp6->in6p_cksum = -1; /* just to be sure */ 592#ifdef INET 593 /* 594 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 595 * socket as well, because the socket may be bound to an IPv6 596 * wildcard address, which may match an IPv4-mapped IPv6 address. 597 */ 598 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 599#endif 600 /* 601 * Hmm what about the IPSEC stuff that is missing here but in 602 * sctp_attach()? 603 */ 604 SCTP_INP_WUNLOCK(inp); 605 return (0); 606} 607 608static int 609sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 610{ 611 struct sctp_inpcb *inp; 612 struct in6pcb *inp6; 613 int error; 614 615 inp = (struct sctp_inpcb *)so->so_pcb; 616 if (inp == NULL) { 617 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 618 return (EINVAL); 619 } 620 if (addr) { 621 switch (addr->sa_family) { 622#ifdef INET 623 case AF_INET: 624 if (addr->sa_len != sizeof(struct sockaddr_in)) { 625 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 626 return (EINVAL); 627 } 628 break; 629#endif 630#ifdef INET6 631 case AF_INET6: 632 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 633 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 634 return (EINVAL); 635 } 636 break; 637#endif 638 default: 639 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 640 return (EINVAL); 641 } 642 } 643 inp6 = (struct in6pcb *)inp; 644 inp6->inp_vflag &= ~INP_IPV4; 645 inp6->inp_vflag |= INP_IPV6; 646 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 647 switch (addr->sa_family) { 648#ifdef INET 649 case AF_INET: 650 /* binding v4 addr to v6 socket, so reset flags */ 651 inp6->inp_vflag |= INP_IPV4; 652 inp6->inp_vflag &= ~INP_IPV6; 653 break; 654#endif 655#ifdef INET6 656 case AF_INET6: 657 { 658 struct sockaddr_in6 *sin6_p; 659 660 sin6_p = (struct sockaddr_in6 *)addr; 661 662 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 663 inp6->inp_vflag |= INP_IPV4; 664 } 665#ifdef INET 666 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 667 struct sockaddr_in sin; 668 669 in6_sin6_2_sin(&sin, sin6_p); 670 inp6->inp_vflag |= INP_IPV4; 671 inp6->inp_vflag &= ~INP_IPV6; 672 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 673 return (error); 674 } 675#endif 676 break; 677 } 678#endif 679 default: 680 break; 681 } 682 } else if (addr != NULL) { 683 struct sockaddr_in6 *sin6_p; 684 685 /* IPV6_V6ONLY socket */ 686#ifdef INET 687 if (addr->sa_family == AF_INET) { 688 /* can't bind v4 addr to v6 only socket! */ 689 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 690 return (EINVAL); 691 } 692#endif 693 sin6_p = (struct sockaddr_in6 *)addr; 694 695 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 696 /* can't bind v4-mapped addrs either! */ 697 /* NOTE: we don't support SIIT */ 698 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 699 return (EINVAL); 700 } 701 } 702 error = sctp_inpcb_bind(so, addr, NULL, p); 703 return (error); 704} 705 706 707static void 708sctp6_close(struct socket *so) 709{ 710 sctp_close(so); 711} 712 713/* This could be made common with sctp_detach() since they are identical */ 714 715static 716int 717sctp6_disconnect(struct socket *so) 718{ 719 return (sctp_disconnect(so)); 720} 721 722 723int 724sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 725 struct mbuf *control, struct thread *p); 726 727 728static int 729sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 730 struct mbuf *control, struct thread *p) 731{ 732 struct sctp_inpcb *inp; 733 struct in6pcb *inp6; 734 735#ifdef INET 736 struct sockaddr_in6 *sin6; 737 738#endif /* INET */ 739 /* No SPL needed since sctp_output does this */ 740 741 inp = (struct sctp_inpcb *)so->so_pcb; 742 if (inp == NULL) { 743 if (control) { 744 SCTP_RELEASE_PKT(control); 745 control = NULL; 746 } 747 SCTP_RELEASE_PKT(m); 748 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 749 return (EINVAL); 750 } 751 inp6 = (struct in6pcb *)inp; 752 /* 753 * For the TCP model we may get a NULL addr, if we are a connected 754 * socket thats ok. 755 */ 756 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 757 (addr == NULL)) { 758 goto connected_type; 759 } 760 if (addr == NULL) { 761 SCTP_RELEASE_PKT(m); 762 if (control) { 763 SCTP_RELEASE_PKT(control); 764 control = NULL; 765 } 766 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 767 return (EDESTADDRREQ); 768 } 769#ifdef INET 770 sin6 = (struct sockaddr_in6 *)addr; 771 if (SCTP_IPV6_V6ONLY(inp6)) { 772 /* 773 * if IPV6_V6ONLY flag, we discard datagrams destined to a 774 * v4 addr or v4-mapped addr 775 */ 776 if (addr->sa_family == AF_INET) { 777 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 778 return (EINVAL); 779 } 780 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 781 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 782 return (EINVAL); 783 } 784 } 785 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 786 struct sockaddr_in sin; 787 788 /* convert v4-mapped into v4 addr and send */ 789 in6_sin6_2_sin(&sin, sin6); 790 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 791 } 792#endif /* INET */ 793connected_type: 794 /* now what about control */ 795 if (control) { 796 if (inp->control) { 797 SCTP_PRINTF("huh? control set?\n"); 798 SCTP_RELEASE_PKT(inp->control); 799 inp->control = NULL; 800 } 801 inp->control = control; 802 } 803 /* Place the data */ 804 if (inp->pkt) { 805 SCTP_BUF_NEXT(inp->pkt_last) = m; 806 inp->pkt_last = m; 807 } else { 808 inp->pkt_last = inp->pkt = m; 809 } 810 if ( 811 /* FreeBSD and MacOSX uses a flag passed */ 812 ((flags & PRUS_MORETOCOME) == 0) 813 ) { 814 /* 815 * note with the current version this code will only be used 816 * by OpenBSD, NetBSD and FreeBSD have methods for 817 * re-defining sosend() to use sctp_sosend(). One can 818 * optionaly switch back to this code (by changing back the 819 * defininitions but this is not advisable. 820 */ 821 int ret; 822 823 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 824 inp->pkt = NULL; 825 inp->control = NULL; 826 return (ret); 827 } else { 828 return (0); 829 } 830} 831 832static int 833sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 834{ 835 uint32_t vrf_id; 836 int error = 0; 837 struct sctp_inpcb *inp; 838 struct sctp_tcb *stcb; 839 840#ifdef INET 841 struct in6pcb *inp6; 842 struct sockaddr_in6 *sin6; 843 union sctp_sockstore store; 844 845#endif 846 847#ifdef INET 848 inp6 = (struct in6pcb *)so->so_pcb; 849#endif 850 inp = (struct sctp_inpcb *)so->so_pcb; 851 if (inp == NULL) { 852 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 853 return (ECONNRESET); /* I made the same as TCP since we are 854 * not setup? */ 855 } 856 if (addr == NULL) { 857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 858 return (EINVAL); 859 } 860 switch (addr->sa_family) { 861#ifdef INET 862 case AF_INET: 863 if (addr->sa_len != sizeof(struct sockaddr_in)) { 864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 865 return (EINVAL); 866 } 867 break; 868#endif 869#ifdef INET6 870 case AF_INET6: 871 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 872 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 873 return (EINVAL); 874 } 875 break; 876#endif 877 default: 878 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 879 return (EINVAL); 880 } 881 882 vrf_id = inp->def_vrf_id; 883 SCTP_ASOC_CREATE_LOCK(inp); 884 SCTP_INP_RLOCK(inp); 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 886 SCTP_PCB_FLAGS_UNBOUND) { 887 /* Bind a ephemeral port */ 888 SCTP_INP_RUNLOCK(inp); 889 error = sctp6_bind(so, NULL, p); 890 if (error) { 891 SCTP_ASOC_CREATE_UNLOCK(inp); 892 893 return (error); 894 } 895 SCTP_INP_RLOCK(inp); 896 } 897 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 898 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 899 /* We are already connected AND the TCP model */ 900 SCTP_INP_RUNLOCK(inp); 901 SCTP_ASOC_CREATE_UNLOCK(inp); 902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 903 return (EADDRINUSE); 904 } 905#ifdef INET 906 sin6 = (struct sockaddr_in6 *)addr; 907 if (SCTP_IPV6_V6ONLY(inp6)) { 908 /* 909 * if IPV6_V6ONLY flag, ignore connections destined to a v4 910 * addr or v4-mapped addr 911 */ 912 if (addr->sa_family == AF_INET) { 913 SCTP_INP_RUNLOCK(inp); 914 SCTP_ASOC_CREATE_UNLOCK(inp); 915 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 916 return (EINVAL); 917 } 918 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 919 SCTP_INP_RUNLOCK(inp); 920 SCTP_ASOC_CREATE_UNLOCK(inp); 921 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 922 return (EINVAL); 923 } 924 } 925 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 926 /* convert v4-mapped into v4 addr */ 927 in6_sin6_2_sin(&store.sin, sin6); 928 addr = &store.sa; 929 } 930#endif /* INET */ 931 /* Now do we connect? */ 932 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 933 stcb = LIST_FIRST(&inp->sctp_asoc_list); 934 if (stcb) { 935 SCTP_TCB_UNLOCK(stcb); 936 } 937 SCTP_INP_RUNLOCK(inp); 938 } else { 939 SCTP_INP_RUNLOCK(inp); 940 SCTP_INP_WLOCK(inp); 941 SCTP_INP_INCR_REF(inp); 942 SCTP_INP_WUNLOCK(inp); 943 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 944 if (stcb == NULL) { 945 SCTP_INP_WLOCK(inp); 946 SCTP_INP_DECR_REF(inp); 947 SCTP_INP_WUNLOCK(inp); 948 } 949 } 950 951 if (stcb != NULL) { 952 /* Already have or am bring up an association */ 953 SCTP_ASOC_CREATE_UNLOCK(inp); 954 SCTP_TCB_UNLOCK(stcb); 955 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 956 return (EALREADY); 957 } 958 /* We are GOOD to go */ 959 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 960 SCTP_ASOC_CREATE_UNLOCK(inp); 961 if (stcb == NULL) { 962 /* Gak! no memory */ 963 return (error); 964 } 965 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 966 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 967 /* Set the connected flag so we can queue data */ 968 soisconnecting(so); 969 } 970 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 971 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 972 973 /* initialize authentication parameters for the assoc */ 974 sctp_initialize_auth_params(inp, stcb); 975 976 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 977 SCTP_TCB_UNLOCK(stcb); 978 return (error); 979} 980 981static int 982sctp6_getaddr(struct socket *so, struct sockaddr **addr) 983{ 984 struct sockaddr_in6 *sin6; 985 struct sctp_inpcb *inp; 986 uint32_t vrf_id; 987 struct sctp_ifa *sctp_ifa; 988 989 int error; 990 991 /* 992 * Do the malloc first in case it blocks. 993 */ 994 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 995 if (sin6 == NULL) 996 return (ENOMEM); 997 sin6->sin6_family = AF_INET6; 998 sin6->sin6_len = sizeof(*sin6); 999 1000 inp = (struct sctp_inpcb *)so->so_pcb; 1001 if (inp == NULL) { 1002 SCTP_FREE_SONAME(sin6); 1003 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1004 return (ECONNRESET); 1005 } 1006 SCTP_INP_RLOCK(inp); 1007 sin6->sin6_port = inp->sctp_lport; 1008 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1009 /* For the bound all case you get back 0 */ 1010 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1011 struct sctp_tcb *stcb; 1012 struct sockaddr_in6 *sin_a6; 1013 struct sctp_nets *net; 1014 int fnd; 1015 1016 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1017 if (stcb == NULL) { 1018 goto notConn6; 1019 } 1020 fnd = 0; 1021 sin_a6 = NULL; 1022 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1023 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1024 if (sin_a6 == NULL) 1025 /* this will make coverity happy */ 1026 continue; 1027 1028 if (sin_a6->sin6_family == AF_INET6) { 1029 fnd = 1; 1030 break; 1031 } 1032 } 1033 if ((!fnd) || (sin_a6 == NULL)) { 1034 /* punt */ 1035 goto notConn6; 1036 } 1037 vrf_id = inp->def_vrf_id; 1038 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1039 if (sctp_ifa) { 1040 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1041 } 1042 } else { 1043 /* For the bound all case you get back 0 */ 1044 notConn6: 1045 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1046 } 1047 } else { 1048 /* Take the first IPv6 address in the list */ 1049 struct sctp_laddr *laddr; 1050 int fnd = 0; 1051 1052 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1053 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1054 struct sockaddr_in6 *sin_a; 1055 1056 sin_a = &laddr->ifa->address.sin6; 1057 sin6->sin6_addr = sin_a->sin6_addr; 1058 fnd = 1; 1059 break; 1060 } 1061 } 1062 if (!fnd) { 1063 SCTP_FREE_SONAME(sin6); 1064 SCTP_INP_RUNLOCK(inp); 1065 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1066 return (ENOENT); 1067 } 1068 } 1069 SCTP_INP_RUNLOCK(inp); 1070 /* Scoping things for v6 */ 1071 if ((error = sa6_recoverscope(sin6)) != 0) { 1072 SCTP_FREE_SONAME(sin6); 1073 return (error); 1074 } 1075 (*addr) = (struct sockaddr *)sin6; 1076 return (0); 1077} 1078 1079static int 1080sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1081{ 1082 struct sockaddr_in6 *sin6; 1083 int fnd; 1084 struct sockaddr_in6 *sin_a6; 1085 struct sctp_inpcb *inp; 1086 struct sctp_tcb *stcb; 1087 struct sctp_nets *net; 1088 int error; 1089 1090 /* Do the malloc first in case it blocks. */ 1091 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1092 if (sin6 == NULL) 1093 return (ENOMEM); 1094 sin6->sin6_family = AF_INET6; 1095 sin6->sin6_len = sizeof(*sin6); 1096 1097 inp = (struct sctp_inpcb *)so->so_pcb; 1098 if ((inp == NULL) || 1099 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1100 /* UDP type and listeners will drop out here */ 1101 SCTP_FREE_SONAME(sin6); 1102 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1103 return (ENOTCONN); 1104 } 1105 SCTP_INP_RLOCK(inp); 1106 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1107 if (stcb) { 1108 SCTP_TCB_LOCK(stcb); 1109 } 1110 SCTP_INP_RUNLOCK(inp); 1111 if (stcb == NULL) { 1112 SCTP_FREE_SONAME(sin6); 1113 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1114 return (ECONNRESET); 1115 } 1116 fnd = 0; 1117 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1118 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1119 if (sin_a6->sin6_family == AF_INET6) { 1120 fnd = 1; 1121 sin6->sin6_port = stcb->rport; 1122 sin6->sin6_addr = sin_a6->sin6_addr; 1123 break; 1124 } 1125 } 1126 SCTP_TCB_UNLOCK(stcb); 1127 if (!fnd) { 1128 /* No IPv4 address */ 1129 SCTP_FREE_SONAME(sin6); 1130 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1131 return (ENOENT); 1132 } 1133 if ((error = sa6_recoverscope(sin6)) != 0) { 1134 SCTP_FREE_SONAME(sin6); 1135 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1136 return (error); 1137 } 1138 *addr = (struct sockaddr *)sin6; 1139 return (0); 1140} 1141 1142static int 1143sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1144{ 1145#ifdef INET 1146 struct sockaddr *addr; 1147 1148#endif 1149 struct in6pcb *inp6 = sotoin6pcb(so); 1150 int error; 1151 1152 if (inp6 == NULL) { 1153 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1154 return (EINVAL); 1155 } 1156 /* allow v6 addresses precedence */ 1157 error = sctp6_getaddr(so, nam); 1158#ifdef INET 1159 if (error) { 1160 /* try v4 next if v6 failed */ 1161 error = sctp_ingetaddr(so, nam); 1162 if (error) { 1163 return (error); 1164 } 1165 addr = *nam; 1166 /* if I'm V6ONLY, convert it to v4-mapped */ 1167 if (SCTP_IPV6_V6ONLY(inp6)) { 1168 struct sockaddr_in6 sin6; 1169 1170 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1171 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1172 } 1173 } 1174#endif 1175 return (error); 1176} 1177 1178 1179static int 1180sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1181{ 1182#ifdef INET 1183 struct sockaddr *addr; 1184 1185#endif 1186 struct in6pcb *inp6 = sotoin6pcb(so); 1187 int error; 1188 1189 if (inp6 == NULL) { 1190 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1191 return (EINVAL); 1192 } 1193 /* allow v6 addresses precedence */ 1194 error = sctp6_peeraddr(so, nam); 1195#ifdef INET 1196 if (error) { 1197 /* try v4 next if v6 failed */ 1198 error = sctp_peeraddr(so, nam); 1199 if (error) { 1200 return (error); 1201 } 1202 addr = *nam; 1203 /* if I'm V6ONLY, convert it to v4-mapped */ 1204 if (SCTP_IPV6_V6ONLY(inp6)) { 1205 struct sockaddr_in6 sin6; 1206 1207 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1208 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1209 } 1210 } 1211#endif 1212 return (error); 1213} 1214 1215struct pr_usrreqs sctp6_usrreqs = { 1216 .pru_abort = sctp6_abort, 1217 .pru_accept = sctp_accept, 1218 .pru_attach = sctp6_attach, 1219 .pru_bind = sctp6_bind, 1220 .pru_connect = sctp6_connect, 1221 .pru_control = in6_control, 1222 .pru_close = sctp6_close, 1223 .pru_detach = sctp6_close, 1224 .pru_sopoll = sopoll_generic, 1225 .pru_flush = sctp_flush, 1226 .pru_disconnect = sctp6_disconnect, 1227 .pru_listen = sctp_listen, 1228 .pru_peeraddr = sctp6_getpeeraddr, 1229 .pru_send = sctp6_send, 1230 .pru_shutdown = sctp_shutdown, 1231 .pru_sockaddr = sctp6_in6getaddr, 1232 .pru_sosend = sctp_sosend, 1233 .pru_soreceive = sctp_soreceive 1234}; 1235 1236#endif 1237