sctp6_usrreq.c revision 172156
1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3163953Srrs * 4163953Srrs * Redistribution and use in source and binary forms, with or without 5163953Srrs * modification, are permitted provided that the following conditions are met: 6163953Srrs * 7163953Srrs * a) Redistributions of source code must retain the above copyright notice, 8163953Srrs * this list of conditions and the following disclaimer. 9163953Srrs * 10163953Srrs * b) Redistributions in binary form must reproduce the above copyright 11163953Srrs * notice, this list of conditions and the following disclaimer in 12163953Srrs * the documentation and/or other materials provided with the distribution. 13163953Srrs * 14163953Srrs * c) Neither the name of Cisco Systems, Inc. nor the names of its 15163953Srrs * contributors may be used to endorse or promote products derived 16163953Srrs * from this software without specific prior written permission. 17163953Srrs * 18163953Srrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19163953Srrs * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20163953Srrs * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21163953Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22163953Srrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23163953Srrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24163953Srrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25163953Srrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26163953Srrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27163953Srrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28163953Srrs * THE POSSIBILITY OF SUCH DAMAGE. 29163953Srrs */ 30163953Srrs/* $KAME: sctp6_usrreq.c,v 1.38 2005/08/24 08:08:56 suz Exp $ */ 31163954Srrs#include <sys/cdefs.h> 32163953Srrs__FBSDID("$FreeBSD: head/sys/netinet6/sctp6_usrreq.c 172156 2007-09-13 10:36:43Z rrs $"); 33163953Srrs 34168709Srrs 35166086Srrs#include <netinet/sctp_os.h> 36163953Srrs#include <sys/proc.h> 37163953Srrs#include <netinet/sctp_pcb.h> 38163953Srrs#include <netinet/sctp_header.h> 39163953Srrs#include <netinet/sctp_var.h> 40168709Srrs#if defined(INET6) 41168709Srrs#include <netinet6/sctp6_var.h> 42168709Srrs#endif 43167598Srrs#include <netinet/sctp_sysctl.h> 44163953Srrs#include <netinet/sctp_output.h> 45166086Srrs#include <netinet/sctp_uio.h> 46163953Srrs#include <netinet/sctp_asconf.h> 47166086Srrs#include <netinet/sctputil.h> 48166086Srrs#include <netinet/sctp_indata.h> 49166086Srrs#include <netinet/sctp_timer.h> 50166086Srrs#include <netinet/sctp_auth.h> 51168709Srrs#include <netinet/sctp_input.h> 52168709Srrs#include <netinet/sctp_output.h> 53170091Srrs#include <netinet/sctp_bsd_addr.h> 54163953Srrs 55171167Sgnn#ifdef IPSEC 56171133Sgnn#include <netipsec/ipsec.h> 57171133Sgnn#if defined(INET6) 58171133Sgnn#include <netipsec/ipsec6.h> 59171440Srrs#endif /* INET6 */ 60171440Srrs#endif /* IPSEC */ 61163953Srrs 62163953Srrsextern struct protosw inetsw[]; 63163953Srrs 64163953Srrsint 65171259Sdelphijsctp6_input(struct mbuf **i_pak, int *offp, int proto) 66163953Srrs{ 67165647Srrs struct mbuf *m; 68163953Srrs struct ip6_hdr *ip6; 69163953Srrs struct sctphdr *sh; 70163953Srrs struct sctp_inpcb *in6p = NULL; 71163953Srrs struct sctp_nets *net; 72163953Srrs int refcount_up = 0; 73169352Srrs uint32_t check, calc_check; 74170181Srrs uint32_t vrf_id = 0; 75163953Srrs struct inpcb *in6p_ip; 76163953Srrs struct sctp_chunkhdr *ch; 77163953Srrs int length, mlen, offset, iphlen; 78168299Srrs uint8_t ecn_bits; 79163953Srrs struct sctp_tcb *stcb = NULL; 80170056Srrs int pkt_len = 0; 81163953Srrs int off = *offp; 82163953Srrs 83169352Srrs /* get the VRF and table id's */ 84169352Srrs if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 85169352Srrs SCTP_RELEASE_PKT(*i_pak); 86169352Srrs return (-1); 87169352Srrs } 88168709Srrs m = SCTP_HEADER_TO_CHAIN(*i_pak); 89170056Srrs pkt_len = SCTP_HEADER_LEN((*i_pak)); 90165647Srrs 91170091Srrs#ifdef SCTP_PACKET_LOGGING 92170091Srrs sctp_packet_log(m, pkt_len); 93170091Srrs#endif 94163953Srrs ip6 = mtod(m, struct ip6_hdr *); 95163953Srrs /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ 96170056Srrs IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, 97170056Srrs (int)(sizeof(*sh) + sizeof(*ch))); 98163953Srrs if (sh == NULL) { 99163953Srrs SCTP_STAT_INCR(sctps_hdrops); 100163953Srrs return IPPROTO_DONE; 101163953Srrs } 102163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 103163953Srrs iphlen = off; 104163953Srrs offset = iphlen + sizeof(*sh) + sizeof(*ch); 105170859Srrs SCTPDBG(SCTP_DEBUG_INPUT1, 106170859Srrs "sctp6_input() length:%d iphlen:%d\n", pkt_len, iphlen); 107163953Srrs 108170859Srrs 109163953Srrs#if defined(NFAITH) && NFAITH > 0 110163953Srrs 111163953Srrs if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { 112163953Srrs /* XXX send icmp6 host/port unreach? */ 113163953Srrs goto bad; 114163953Srrs } 115163953Srrs#endif /* NFAITH defined and > 0 */ 116163953Srrs SCTP_STAT_INCR(sctps_recvpackets); 117163953Srrs SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 118169420Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "V6 input gets a packet iphlen:%d pktlen:%d\n", 119170056Srrs iphlen, pkt_len); 120163953Srrs if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 121163953Srrs /* No multi-cast support in SCTP */ 122163953Srrs goto bad; 123163953Srrs } 124163953Srrs /* destination port of 0 is illegal, based on RFC2960. */ 125163953Srrs if (sh->dest_port == 0) 126163953Srrs goto bad; 127171990Srrs check = sh->checksum; /* save incoming checksum */ 128171990Srrs if ((check == 0) && (sctp_no_csum_on_loopback) && 129171990Srrs (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst))) { 130171990Srrs goto sctp_skip_csum; 131171990Srrs } 132171990Srrs sh->checksum = 0; /* prepare for calc */ 133171990Srrs calc_check = sctp_calculate_sum(m, &mlen, iphlen); 134171990Srrs if (calc_check != check) { 135171990Srrs SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 136171990Srrs calc_check, check, m, mlen, iphlen); 137171990Srrs stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 138171990Srrs sh, ch, &in6p, &net, vrf_id); 139171990Srrs /* in6p's ref-count increased && stcb locked */ 140171990Srrs if ((in6p) && (stcb)) { 141171990Srrs sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 142172090Srrs sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED); 143171990Srrs } else if ((in6p != NULL) && (stcb == NULL)) { 144171990Srrs refcount_up = 1; 145163953Srrs } 146171990Srrs SCTP_STAT_INCR(sctps_badsum); 147171990Srrs SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 148171990Srrs goto bad; 149165647Srrs } 150171990Srrs sh->checksum = calc_check; 151171990Srrs 152163953Srrssctp_skip_csum: 153163953Srrs net = NULL; 154163953Srrs /* 155163953Srrs * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 156163953Srrs * IP/SCTP/first chunk header... 157163953Srrs */ 158163953Srrs stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 159168299Srrs sh, ch, &in6p, &net, vrf_id); 160163953Srrs /* in6p's ref-count increased */ 161163953Srrs if (in6p == NULL) { 162163953Srrs struct sctp_init_chunk *init_chk, chunk_buf; 163163953Srrs 164163953Srrs SCTP_STAT_INCR(sctps_noport); 165163953Srrs if (ch->chunk_type == SCTP_INITIATION) { 166163953Srrs /* 167163953Srrs * we do a trick here to get the INIT tag, dig in 168163953Srrs * and get the tag from the INIT and put it in the 169163953Srrs * common header. 170163953Srrs */ 171163953Srrs init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 172163953Srrs iphlen + sizeof(*sh), sizeof(*init_chk), 173168299Srrs (uint8_t *) & chunk_buf); 174169420Srrs if (init_chk) 175169420Srrs sh->v_tag = init_chk->init.initiate_tag; 176169420Srrs else 177169420Srrs sh->v_tag = 0; 178163953Srrs } 179165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 180170181Srrs sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id); 181165220Srrs goto bad; 182165220Srrs } 183165220Srrs if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 184165220Srrs goto bad; 185165220Srrs } 186165220Srrs if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 187170181Srrs sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id); 188163953Srrs goto bad; 189163953Srrs } else if (stcb == NULL) { 190163953Srrs refcount_up = 1; 191163953Srrs } 192163953Srrs in6p_ip = (struct inpcb *)in6p; 193171167Sgnn#ifdef IPSEC 194163953Srrs /* 195163953Srrs * Check AH/ESP integrity. 196163953Srrs */ 197163996Srrs if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { 198163953Srrs/* XXX */ 199163953Srrs ipsec6stat.in_polvio++; 200163953Srrs goto bad; 201163996Srrs } 202171440Srrs#endif /* IPSEC */ 203163953Srrs 204163953Srrs /* 205163953Srrs * CONTROL chunk processing 206163953Srrs */ 207163953Srrs offset -= sizeof(*ch); 208163953Srrs ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 209165647Srrs 210165647Srrs /* Length now holds the total packet length payload + iphlen */ 211165647Srrs length = ntohs(ip6->ip6_plen) + iphlen; 212165647Srrs 213169655Srrs /* sa_ignore NO_NULL_CHK */ 214169378Srrs sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 215170181Srrs in6p, stcb, net, ecn_bits, vrf_id); 216163953Srrs /* inp's ref-count reduced && stcb unlocked */ 217163953Srrs /* XXX this stuff below gets moved to appropriate parts later... */ 218163953Srrs if (m) 219169352Srrs sctp_m_freem(m); 220163953Srrs if ((in6p) && refcount_up) { 221163953Srrs /* reduce ref-count */ 222163953Srrs SCTP_INP_WLOCK(in6p); 223163953Srrs SCTP_INP_DECR_REF(in6p); 224163953Srrs SCTP_INP_WUNLOCK(in6p); 225163953Srrs } 226163953Srrs return IPPROTO_DONE; 227163953Srrs 228163953Srrsbad: 229169420Srrs if (stcb) { 230163953Srrs SCTP_TCB_UNLOCK(stcb); 231169420Srrs } 232163953Srrs if ((in6p) && refcount_up) { 233163953Srrs /* reduce ref-count */ 234163953Srrs SCTP_INP_WLOCK(in6p); 235163953Srrs SCTP_INP_DECR_REF(in6p); 236163953Srrs SCTP_INP_WUNLOCK(in6p); 237163953Srrs } 238163953Srrs if (m) 239169352Srrs sctp_m_freem(m); 240163953Srrs return IPPROTO_DONE; 241163953Srrs} 242163953Srrs 243163953Srrs 244163953Srrsstatic void 245171259Sdelphijsctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 246171259Sdelphij struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 247163953Srrs{ 248168299Srrs uint32_t nxtsz; 249163953Srrs 250163953Srrs if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 251163953Srrs (icmp6 == NULL) || (sh == NULL)) { 252163953Srrs goto out; 253163953Srrs } 254163953Srrs /* First do we even look at it? */ 255163953Srrs if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 256163953Srrs goto out; 257163953Srrs 258163953Srrs if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 259163953Srrs /* not PACKET TO BIG */ 260163953Srrs goto out; 261163953Srrs } 262163953Srrs /* 263163953Srrs * ok we need to look closely. We could even get smarter and look at 264163953Srrs * anyone that we sent to in case we get a different ICMP that tells 265163953Srrs * us there is no way to reach a host, but for this impl, all we 266163953Srrs * care about is MTU discovery. 267163953Srrs */ 268163953Srrs nxtsz = ntohl(icmp6->icmp6_mtu); 269163953Srrs /* Stop any PMTU timer */ 270165220Srrs sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 271163953Srrs 272163953Srrs /* Adjust destination size limit */ 273163953Srrs if (net->mtu > nxtsz) { 274163953Srrs net->mtu = nxtsz; 275163953Srrs } 276163953Srrs /* now what about the ep? */ 277163953Srrs if (stcb->asoc.smallest_mtu > nxtsz) { 278163953Srrs struct sctp_tmit_chunk *chk; 279163953Srrs 280163953Srrs /* Adjust that too */ 281163953Srrs stcb->asoc.smallest_mtu = nxtsz; 282163953Srrs /* now off to subtract IP_DF flag if needed */ 283163953Srrs 284163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 285168299Srrs if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 286163953Srrs chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 287163953Srrs } 288163953Srrs } 289163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 290168299Srrs if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 291163953Srrs /* 292163953Srrs * For this guy we also mark for immediate 293163953Srrs * resend since we sent to big of chunk 294163953Srrs */ 295163953Srrs chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 296163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) 297163953Srrs stcb->asoc.sent_queue_retran_cnt++; 298163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 299163953Srrs chk->rec.data.doing_fast_retransmit = 0; 300163953Srrs 301163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 302163953Srrs /* Clear any time so NO RTT is being done */ 303163953Srrs chk->sent_rcv_time.tv_sec = 0; 304163953Srrs chk->sent_rcv_time.tv_usec = 0; 305163953Srrs stcb->asoc.total_flight -= chk->send_size; 306163953Srrs net->flight_size -= chk->send_size; 307163953Srrs } 308163953Srrs } 309163953Srrs } 310163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 311163953Srrsout: 312169420Srrs if (stcb) { 313163953Srrs SCTP_TCB_UNLOCK(stcb); 314169420Srrs } 315163953Srrs} 316163953Srrs 317163953Srrs 318172156Srrsvoid 319172091Srrssctp6_notify(struct sctp_inpcb *inp, 320172091Srrs struct icmp6_hdr *icmph, 321172091Srrs struct sctphdr *sh, 322172091Srrs struct sockaddr *to, 323172091Srrs struct sctp_tcb *stcb, 324172091Srrs struct sctp_nets *net) 325172091Srrs{ 326172091Srrs#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 327172091Srrs struct socket *so; 328172091Srrs 329172091Srrs#endif 330172091Srrs /* protection */ 331172091Srrs int reason; 332172091Srrs 333172091Srrs 334172091Srrs if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 335172091Srrs (sh == NULL) || (to == NULL)) { 336172091Srrs if (stcb) 337172091Srrs SCTP_TCB_UNLOCK(stcb); 338172091Srrs return; 339172091Srrs } 340172091Srrs /* First job is to verify the vtag matches what I would send */ 341172091Srrs if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 342172091Srrs SCTP_TCB_UNLOCK(stcb); 343172091Srrs return; 344172091Srrs } 345172091Srrs if (icmph->icmp6_type != ICMP_UNREACH) { 346172091Srrs /* We only care about unreachable */ 347172091Srrs SCTP_TCB_UNLOCK(stcb); 348172091Srrs return; 349172091Srrs } 350172091Srrs if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 351172091Srrs (icmph->icmp6_code == ICMP_UNREACH_HOST) || 352172091Srrs (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 353172091Srrs (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 354172091Srrs (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 355172091Srrs (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 356172091Srrs (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 357172091Srrs (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 358172091Srrs 359172091Srrs /* 360172091Srrs * Hmm reachablity problems we must examine closely. If its 361172091Srrs * not reachable, we may have lost a network. Or if there is 362172091Srrs * NO protocol at the other end named SCTP. well we consider 363172091Srrs * it a OOTB abort. 364172091Srrs */ 365172091Srrs if (net->dest_state & SCTP_ADDR_REACHABLE) { 366172091Srrs /* Ok that destination is NOT reachable */ 367172091Srrs SCTP_PRINTF("ICMP (thresh %d/%d) takes interface %p down\n", 368172091Srrs net->error_count, 369172091Srrs net->failure_threshold, 370172091Srrs net); 371172091Srrs 372172091Srrs net->dest_state &= ~SCTP_ADDR_REACHABLE; 373172091Srrs net->dest_state |= SCTP_ADDR_NOT_REACHABLE; 374172091Srrs /* 375172091Srrs * JRS 5/14/07 - If a destination is unreachable, 376172091Srrs * the PF bit is turned off. This allows an 377172091Srrs * unambiguous use of the PF bit for destinations 378172091Srrs * that are reachable but potentially failed. If the 379172091Srrs * destination is set to the unreachable state, also 380172091Srrs * set the destination to the PF state. 381172091Srrs */ 382172091Srrs /* 383172091Srrs * Add debug message here if destination is not in 384172091Srrs * PF state. 385172091Srrs */ 386172091Srrs /* Stop any running T3 timers here? */ 387172091Srrs if (sctp_cmt_on_off && sctp_cmt_pf) { 388172091Srrs net->dest_state &= ~SCTP_ADDR_PF; 389172091Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from PF to unreachable.\n", 390172091Srrs net); 391172091Srrs } 392172091Srrs net->error_count = net->failure_threshold + 1; 393172091Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 394172091Srrs stcb, SCTP_FAILED_THRESHOLD, 395172091Srrs (void *)net, SCTP_SO_NOT_LOCKED); 396172091Srrs } 397172091Srrs SCTP_TCB_UNLOCK(stcb); 398172091Srrs } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 399172091Srrs (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 400172091Srrs /* 401172091Srrs * Here the peer is either playing tricks on us, including 402172091Srrs * an address that belongs to someone who does not support 403172091Srrs * SCTP OR was a userland implementation that shutdown and 404172091Srrs * now is dead. In either case treat it like a OOTB abort 405172091Srrs * with no TCB 406172091Srrs */ 407172091Srrs reason = SCTP_PEER_FAULTY; 408172091Srrs sctp_abort_notification(stcb, reason, SCTP_SO_NOT_LOCKED); 409172091Srrs#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 410172091Srrs so = SCTP_INP_SO(inp); 411172091Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 412172091Srrs SCTP_TCB_UNLOCK(stcb); 413172091Srrs SCTP_SOCKET_LOCK(so, 1); 414172091Srrs SCTP_TCB_LOCK(stcb); 415172091Srrs atomic_subtract_int(&stcb->asoc.refcnt, 1); 416172091Srrs#endif 417172091Srrs (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 418172091Srrs#if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 419172091Srrs SCTP_SOCKET_UNLOCK(so, 1); 420172091Srrs /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 421172091Srrs#endif 422172091Srrs /* no need to unlock here, since the TCB is gone */ 423172091Srrs } else { 424172091Srrs SCTP_TCB_UNLOCK(stcb); 425172091Srrs } 426172091Srrs} 427172091Srrs 428172091Srrs 429172091Srrs 430163953Srrsvoid 431171259Sdelphijsctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 432163953Srrs{ 433163953Srrs struct sctphdr sh; 434163953Srrs struct ip6ctlparam *ip6cp = NULL; 435167598Srrs uint32_t vrf_id; 436163953Srrs 437167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 438167598Srrs 439163953Srrs if (pktdst->sa_family != AF_INET6 || 440163953Srrs pktdst->sa_len != sizeof(struct sockaddr_in6)) 441163953Srrs return; 442163953Srrs 443163953Srrs if ((unsigned)cmd >= PRC_NCMDS) 444163953Srrs return; 445163953Srrs if (PRC_IS_REDIRECT(cmd)) { 446163953Srrs d = NULL; 447163953Srrs } else if (inet6ctlerrmap[cmd] == 0) { 448163953Srrs return; 449163953Srrs } 450163953Srrs /* if the parameter is from icmp6, decode it. */ 451163953Srrs if (d != NULL) { 452163953Srrs ip6cp = (struct ip6ctlparam *)d; 453163953Srrs } else { 454163953Srrs ip6cp = (struct ip6ctlparam *)NULL; 455163953Srrs } 456163953Srrs 457163953Srrs if (ip6cp) { 458163953Srrs /* 459163953Srrs * XXX: We assume that when IPV6 is non NULL, M and OFF are 460163953Srrs * valid. 461163953Srrs */ 462163953Srrs /* check if we can safely examine src and dst ports */ 463163953Srrs struct sctp_inpcb *inp = NULL; 464163953Srrs struct sctp_tcb *stcb = NULL; 465163953Srrs struct sctp_nets *net = NULL; 466163953Srrs struct sockaddr_in6 final; 467163953Srrs 468165647Srrs if (ip6cp->ip6c_m == NULL) 469163953Srrs return; 470163953Srrs 471163953Srrs bzero(&sh, sizeof(sh)); 472163953Srrs bzero(&final, sizeof(final)); 473163953Srrs inp = NULL; 474163953Srrs net = NULL; 475163953Srrs m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 476163953Srrs (caddr_t)&sh); 477163953Srrs ip6cp->ip6c_src->sin6_port = sh.src_port; 478163953Srrs final.sin6_len = sizeof(final); 479163953Srrs final.sin6_family = AF_INET6; 480163953Srrs final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 481163953Srrs final.sin6_port = sh.dest_port; 482163953Srrs stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 483163953Srrs (struct sockaddr *)&final, 484167598Srrs &inp, &net, 1, vrf_id); 485163953Srrs /* inp's ref-count increased && stcb locked */ 486163953Srrs if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 487163953Srrs if (cmd == PRC_MSGSIZE) { 488163953Srrs sctp6_notify_mbuf(inp, 489163953Srrs ip6cp->ip6c_icmp6, 490163953Srrs &sh, 491163953Srrs stcb, 492163953Srrs net); 493163953Srrs /* inp's ref-count reduced && stcb unlocked */ 494163953Srrs } else { 495172091Srrs sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 496163953Srrs (struct sockaddr *)&final, 497163953Srrs stcb, net); 498163953Srrs /* inp's ref-count reduced && stcb unlocked */ 499163953Srrs } 500163953Srrs } else { 501163953Srrs if (PRC_IS_REDIRECT(cmd) && inp) { 502163953Srrs in6_rtchange((struct in6pcb *)inp, 503163953Srrs inet6ctlerrmap[cmd]); 504163953Srrs } 505163953Srrs if (inp) { 506163953Srrs /* reduce inp's ref-count */ 507163953Srrs SCTP_INP_WLOCK(inp); 508163953Srrs SCTP_INP_DECR_REF(inp); 509163953Srrs SCTP_INP_WUNLOCK(inp); 510163953Srrs } 511163953Srrs if (stcb) 512163953Srrs SCTP_TCB_UNLOCK(stcb); 513163953Srrs } 514163953Srrs } 515163953Srrs} 516163953Srrs 517163953Srrs/* 518163953Srrs * this routine can probably be collasped into the one in sctp_userreq.c 519163953Srrs * since they do the same thing and now we lookup with a sockaddr 520163953Srrs */ 521163953Srrsstatic int 522163953Srrssctp6_getcred(SYSCTL_HANDLER_ARGS) 523163953Srrs{ 524164085Srrs struct xucred xuc; 525163953Srrs struct sockaddr_in6 addrs[2]; 526163953Srrs struct sctp_inpcb *inp; 527163953Srrs struct sctp_nets *net; 528163953Srrs struct sctp_tcb *stcb; 529164085Srrs int error; 530167598Srrs uint32_t vrf_id; 531163953Srrs 532167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 533167598Srrs 534170587Srwatson error = priv_check(req->td, PRIV_NETINET_GETCRED); 535163953Srrs if (error) 536163953Srrs return (error); 537163953Srrs 538171943Srrs if (req->newlen != sizeof(addrs)) { 539171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 540163953Srrs return (EINVAL); 541171943Srrs } 542171943Srrs if (req->oldlen != sizeof(struct ucred)) { 543171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 544163953Srrs return (EINVAL); 545171943Srrs } 546163953Srrs error = SYSCTL_IN(req, addrs, sizeof(addrs)); 547163953Srrs if (error) 548163953Srrs return (error); 549163953Srrs 550163953Srrs stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 551163953Srrs sin6tosa(&addrs[1]), 552167598Srrs &inp, &net, 1, vrf_id); 553163953Srrs if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 554164085Srrs if ((inp != NULL) && (stcb == NULL)) { 555164085Srrs /* reduce ref-count */ 556163953Srrs SCTP_INP_WLOCK(inp); 557163953Srrs SCTP_INP_DECR_REF(inp); 558164085Srrs goto cred_can_cont; 559163953Srrs } 560171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 561164085Srrs error = ENOENT; 562163953Srrs goto out; 563163953Srrs } 564163953Srrs SCTP_TCB_UNLOCK(stcb); 565164085Srrs /* 566164085Srrs * We use the write lock here, only since in the error leg we need 567164085Srrs * it. If we used RLOCK, then we would have to 568164085Srrs * wlock/decr/unlock/rlock. Which in theory could create a hole. 569164085Srrs * Better to use higher wlock. 570164085Srrs */ 571164085Srrs SCTP_INP_WLOCK(inp); 572164085Srrscred_can_cont: 573164085Srrs error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 574164085Srrs if (error) { 575164085Srrs SCTP_INP_WUNLOCK(inp); 576164085Srrs goto out; 577164085Srrs } 578164085Srrs cru2x(inp->sctp_socket->so_cred, &xuc); 579164085Srrs SCTP_INP_WUNLOCK(inp); 580164085Srrs error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 581163953Srrsout: 582163953Srrs return (error); 583163953Srrs} 584163953Srrs 585163953SrrsSYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 586163953Srrs 0, 0, 587163953Srrs sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 588163953Srrs 589163953Srrs 590163953Srrs/* This is the same as the sctp_abort() could be made common */ 591163953Srrsstatic void 592163953Srrssctp6_abort(struct socket *so) 593163953Srrs{ 594163953Srrs struct sctp_inpcb *inp; 595163953Srrs uint32_t flags; 596163953Srrs 597163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 598172091Srrs if (inp == 0) { 599172091Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 600163953Srrs return; 601172091Srrs } 602163953Srrssctp_must_try_again: 603163953Srrs flags = inp->sctp_flags; 604163953Srrs#ifdef SCTP_LOG_CLOSING 605163953Srrs sctp_log_closing(inp, NULL, 17); 606163953Srrs#endif 607163953Srrs if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 608163953Srrs (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 609163953Srrs#ifdef SCTP_LOG_CLOSING 610163953Srrs sctp_log_closing(inp, NULL, 16); 611163953Srrs#endif 612169380Srrs sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 613169380Srrs SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 614163953Srrs SOCK_LOCK(so); 615167695Srrs SCTP_SB_CLEAR(so->so_snd); 616163953Srrs /* 617163953Srrs * same for the rcv ones, they are only here for the 618163953Srrs * accounting/select. 619163953Srrs */ 620167695Srrs SCTP_SB_CLEAR(so->so_rcv); 621167695Srrs /* Now null out the reference, we are completely detached. */ 622163953Srrs so->so_pcb = NULL; 623163953Srrs SOCK_UNLOCK(so); 624163953Srrs } else { 625163953Srrs flags = inp->sctp_flags; 626163953Srrs if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 627163953Srrs goto sctp_must_try_again; 628163953Srrs } 629163953Srrs } 630163953Srrs return; 631163953Srrs} 632163953Srrs 633163953Srrsstatic int 634163953Srrssctp6_attach(struct socket *so, int proto, struct thread *p) 635163953Srrs{ 636163953Srrs struct in6pcb *inp6; 637166086Srrs int error; 638163953Srrs struct sctp_inpcb *inp; 639170205Srrs uint32_t vrf_id = SCTP_DEFAULT_VRFID; 640163953Srrs 641163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 642171943Srrs if (inp != NULL) { 643171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 644163953Srrs return EINVAL; 645171943Srrs } 646163953Srrs if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 647167695Srrs error = SCTP_SORESERVE(so, sctp_sendspace, sctp_recvspace); 648163953Srrs if (error) 649163953Srrs return error; 650163953Srrs } 651170205Srrs error = sctp_inpcb_alloc(so, vrf_id); 652163953Srrs if (error) 653163953Srrs return error; 654163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 655170205Srrs SCTP_INP_WLOCK(inp); 656163953Srrs inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 657163953Srrs inp6 = (struct in6pcb *)inp; 658163953Srrs 659163953Srrs inp6->inp_vflag |= INP_IPV6; 660163953Srrs inp6->in6p_hops = -1; /* use kernel default */ 661163953Srrs inp6->in6p_cksum = -1; /* just to be sure */ 662163953Srrs#ifdef INET 663163953Srrs /* 664163953Srrs * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 665163953Srrs * socket as well, because the socket may be bound to an IPv6 666163953Srrs * wildcard address, which may match an IPv4-mapped IPv6 address. 667163953Srrs */ 668163953Srrs inp6->inp_ip_ttl = ip_defttl; 669163953Srrs#endif 670163953Srrs /* 671163953Srrs * Hmm what about the IPSEC stuff that is missing here but in 672163953Srrs * sctp_attach()? 673163953Srrs */ 674170205Srrs SCTP_INP_WUNLOCK(inp); 675163953Srrs return 0; 676163953Srrs} 677163953Srrs 678163953Srrsstatic int 679163953Srrssctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 680163953Srrs{ 681163953Srrs struct sctp_inpcb *inp; 682163953Srrs struct in6pcb *inp6; 683166086Srrs int error; 684163953Srrs 685163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 686171943Srrs if (inp == 0) { 687171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 688163953Srrs return EINVAL; 689171943Srrs } 690170056Srrs if (addr) { 691170056Srrs if ((addr->sa_family == AF_INET6) && 692170056Srrs (addr->sa_len != sizeof(struct sockaddr_in6))) { 693171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 694170056Srrs return EINVAL; 695170056Srrs } 696170056Srrs if ((addr->sa_family == AF_INET) && 697170056Srrs (addr->sa_len != sizeof(struct sockaddr_in))) { 698171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 699170056Srrs return EINVAL; 700170056Srrs } 701170056Srrs } 702163953Srrs inp6 = (struct in6pcb *)inp; 703163953Srrs inp6->inp_vflag &= ~INP_IPV4; 704163953Srrs inp6->inp_vflag |= INP_IPV6; 705166023Srrs if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 706163953Srrs if (addr->sa_family == AF_INET) { 707163953Srrs /* binding v4 addr to v6 socket, so reset flags */ 708163953Srrs inp6->inp_vflag |= INP_IPV4; 709163953Srrs inp6->inp_vflag &= ~INP_IPV6; 710163953Srrs } else { 711163953Srrs struct sockaddr_in6 *sin6_p; 712163953Srrs 713163953Srrs sin6_p = (struct sockaddr_in6 *)addr; 714163953Srrs 715163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 716163953Srrs inp6->inp_vflag |= INP_IPV4; 717163953Srrs } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 718163953Srrs struct sockaddr_in sin; 719163953Srrs 720163953Srrs in6_sin6_2_sin(&sin, sin6_p); 721163953Srrs inp6->inp_vflag |= INP_IPV4; 722163953Srrs inp6->inp_vflag &= ~INP_IPV6; 723171572Srrs error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 724163953Srrs return error; 725163953Srrs } 726163953Srrs } 727163953Srrs } else if (addr != NULL) { 728163953Srrs /* IPV6_V6ONLY socket */ 729163953Srrs if (addr->sa_family == AF_INET) { 730163953Srrs /* can't bind v4 addr to v6 only socket! */ 731171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 732163953Srrs return EINVAL; 733163953Srrs } else { 734163953Srrs struct sockaddr_in6 *sin6_p; 735163953Srrs 736163953Srrs sin6_p = (struct sockaddr_in6 *)addr; 737163953Srrs 738172091Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 739163953Srrs /* can't bind v4-mapped addrs either! */ 740163953Srrs /* NOTE: we don't support SIIT */ 741171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 742172091Srrs return EINVAL; 743172091Srrs } 744163953Srrs } 745163953Srrs } 746171572Srrs error = sctp_inpcb_bind(so, addr, NULL, p); 747163953Srrs return error; 748163953Srrs} 749163953Srrs 750163953Srrs 751163953Srrsstatic void 752163953Srrssctp6_close(struct socket *so) 753163953Srrs{ 754171990Srrs sctp_close(so); 755163953Srrs} 756163953Srrs 757167598Srrs/* This could be made common with sctp_detach() since they are identical */ 758163953Srrs 759168709Srrsstatic 760168709Srrsint 761163953Srrssctp6_disconnect(struct socket *so) 762163953Srrs{ 763171990Srrs return (sctp_disconnect(so)); 764163953Srrs} 765163953Srrs 766168709Srrs 767163953Srrsint 768163953Srrssctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 769163953Srrs struct mbuf *control, struct thread *p); 770163953Srrs 771163953Srrs 772163953Srrsstatic int 773163953Srrssctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 774163953Srrs struct mbuf *control, struct thread *p) 775163953Srrs{ 776163953Srrs struct sctp_inpcb *inp; 777163953Srrs struct inpcb *in_inp; 778163953Srrs struct in6pcb *inp6; 779163953Srrs 780163953Srrs#ifdef INET 781163953Srrs struct sockaddr_in6 *sin6; 782163953Srrs 783163953Srrs#endif /* INET */ 784163953Srrs /* No SPL needed since sctp_output does this */ 785163953Srrs 786163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 787163953Srrs if (inp == NULL) { 788163953Srrs if (control) { 789169352Srrs SCTP_RELEASE_PKT(control); 790163953Srrs control = NULL; 791163953Srrs } 792169352Srrs SCTP_RELEASE_PKT(m); 793171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 794163953Srrs return EINVAL; 795163953Srrs } 796163953Srrs in_inp = (struct inpcb *)inp; 797163953Srrs inp6 = (struct in6pcb *)inp; 798163953Srrs /* 799163953Srrs * For the TCP model we may get a NULL addr, if we are a connected 800163953Srrs * socket thats ok. 801163953Srrs */ 802163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 803163953Srrs (addr == NULL)) { 804163953Srrs goto connected_type; 805163953Srrs } 806163953Srrs if (addr == NULL) { 807169352Srrs SCTP_RELEASE_PKT(m); 808163953Srrs if (control) { 809169352Srrs SCTP_RELEASE_PKT(control); 810163953Srrs control = NULL; 811163953Srrs } 812171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 813163953Srrs return (EDESTADDRREQ); 814163953Srrs } 815163953Srrs#ifdef INET 816163953Srrs sin6 = (struct sockaddr_in6 *)addr; 817166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 818163953Srrs /* 819163953Srrs * if IPV6_V6ONLY flag, we discard datagrams destined to a 820163953Srrs * v4 addr or v4-mapped addr 821163953Srrs */ 822163953Srrs if (addr->sa_family == AF_INET) { 823171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 824163953Srrs return EINVAL; 825163953Srrs } 826163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 827171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 828163953Srrs return EINVAL; 829163953Srrs } 830163953Srrs } 831163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 832163953Srrs if (!ip6_v6only) { 833163953Srrs struct sockaddr_in sin; 834163953Srrs 835163953Srrs /* convert v4-mapped into v4 addr and send */ 836163953Srrs in6_sin6_2_sin(&sin, sin6); 837163953Srrs return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 838163953Srrs control, p); 839163953Srrs } else { 840163953Srrs /* mapped addresses aren't enabled */ 841171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 842163953Srrs return EINVAL; 843163953Srrs } 844163953Srrs } 845163953Srrs#endif /* INET */ 846163953Srrsconnected_type: 847163953Srrs /* now what about control */ 848163953Srrs if (control) { 849163953Srrs if (inp->control) { 850169420Srrs SCTP_PRINTF("huh? control set?\n"); 851169352Srrs SCTP_RELEASE_PKT(inp->control); 852163953Srrs inp->control = NULL; 853163953Srrs } 854163953Srrs inp->control = control; 855163953Srrs } 856163953Srrs /* Place the data */ 857163953Srrs if (inp->pkt) { 858165647Srrs SCTP_BUF_NEXT(inp->pkt_last) = m; 859163953Srrs inp->pkt_last = m; 860163953Srrs } else { 861163953Srrs inp->pkt_last = inp->pkt = m; 862163953Srrs } 863163953Srrs if ( 864163953Srrs /* FreeBSD and MacOSX uses a flag passed */ 865163953Srrs ((flags & PRUS_MORETOCOME) == 0) 866163953Srrs ) { 867163953Srrs /* 868163953Srrs * note with the current version this code will only be used 869163953Srrs * by OpenBSD, NetBSD and FreeBSD have methods for 870163953Srrs * re-defining sosend() to use sctp_sosend(). One can 871163953Srrs * optionaly switch back to this code (by changing back the 872163953Srrs * defininitions but this is not advisable. 873163953Srrs */ 874163953Srrs int ret; 875163953Srrs 876163953Srrs ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 877163953Srrs inp->pkt = NULL; 878163953Srrs inp->control = NULL; 879163953Srrs return (ret); 880163953Srrs } else { 881163953Srrs return (0); 882163953Srrs } 883163953Srrs} 884163953Srrs 885163953Srrsstatic int 886163953Srrssctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 887163953Srrs{ 888167598Srrs uint32_t vrf_id; 889163953Srrs int error = 0; 890163953Srrs struct sctp_inpcb *inp; 891163953Srrs struct in6pcb *inp6; 892163953Srrs struct sctp_tcb *stcb; 893163953Srrs 894163953Srrs#ifdef INET 895163953Srrs struct sockaddr_in6 *sin6; 896163953Srrs struct sockaddr_storage ss; 897163953Srrs 898163953Srrs#endif /* INET */ 899163953Srrs 900163953Srrs inp6 = (struct in6pcb *)so->so_pcb; 901163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 902163953Srrs if (inp == 0) { 903171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 904163953Srrs return (ECONNRESET); /* I made the same as TCP since we are 905163953Srrs * not setup? */ 906163953Srrs } 907170056Srrs if (addr == NULL) { 908171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 909170056Srrs return (EINVAL); 910170056Srrs } 911170056Srrs if ((addr->sa_family == AF_INET6) && (addr->sa_len != sizeof(struct sockaddr_in6))) { 912171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 913170056Srrs return (EINVAL); 914170056Srrs } 915170056Srrs if ((addr->sa_family == AF_INET) && (addr->sa_len != sizeof(struct sockaddr_in))) { 916171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 917170056Srrs return (EINVAL); 918170056Srrs } 919168299Srrs vrf_id = inp->def_vrf_id; 920163953Srrs SCTP_ASOC_CREATE_LOCK(inp); 921163953Srrs SCTP_INP_RLOCK(inp); 922163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 923163953Srrs SCTP_PCB_FLAGS_UNBOUND) { 924163953Srrs /* Bind a ephemeral port */ 925163953Srrs SCTP_INP_RUNLOCK(inp); 926163953Srrs error = sctp6_bind(so, NULL, p); 927163953Srrs if (error) { 928163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 929163953Srrs 930163953Srrs return (error); 931163953Srrs } 932163953Srrs SCTP_INP_RLOCK(inp); 933163953Srrs } 934163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 935163953Srrs (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 936163953Srrs /* We are already connected AND the TCP model */ 937163953Srrs SCTP_INP_RUNLOCK(inp); 938163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 939171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 940163953Srrs return (EADDRINUSE); 941163953Srrs } 942163953Srrs#ifdef INET 943163953Srrs sin6 = (struct sockaddr_in6 *)addr; 944166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 945163953Srrs /* 946163953Srrs * if IPV6_V6ONLY flag, ignore connections destined to a v4 947163953Srrs * addr or v4-mapped addr 948163953Srrs */ 949163953Srrs if (addr->sa_family == AF_INET) { 950163953Srrs SCTP_INP_RUNLOCK(inp); 951163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 952171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 953163953Srrs return EINVAL; 954163953Srrs } 955163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 956163953Srrs SCTP_INP_RUNLOCK(inp); 957163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 958171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 959163953Srrs return EINVAL; 960163953Srrs } 961163953Srrs } 962163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 963163953Srrs if (!ip6_v6only) { 964163953Srrs /* convert v4-mapped into v4 addr */ 965163953Srrs in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 966163953Srrs addr = (struct sockaddr *)&ss; 967163953Srrs } else { 968163953Srrs /* mapped addresses aren't enabled */ 969163953Srrs SCTP_INP_RUNLOCK(inp); 970163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 971171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 972163953Srrs return EINVAL; 973163953Srrs } 974163953Srrs } else 975163953Srrs#endif /* INET */ 976163953Srrs addr = addr; /* for true v6 address case */ 977163953Srrs 978163953Srrs /* Now do we connect? */ 979163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 980163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 981169420Srrs if (stcb) { 982163953Srrs SCTP_TCB_UNLOCK(stcb); 983169420Srrs } 984163953Srrs SCTP_INP_RUNLOCK(inp); 985163953Srrs } else { 986163953Srrs SCTP_INP_RUNLOCK(inp); 987163953Srrs SCTP_INP_WLOCK(inp); 988163953Srrs SCTP_INP_INCR_REF(inp); 989163953Srrs SCTP_INP_WUNLOCK(inp); 990163953Srrs stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 991163953Srrs if (stcb == NULL) { 992163953Srrs SCTP_INP_WLOCK(inp); 993163953Srrs SCTP_INP_DECR_REF(inp); 994163953Srrs SCTP_INP_WUNLOCK(inp); 995163953Srrs } 996163953Srrs } 997163953Srrs 998163953Srrs if (stcb != NULL) { 999163953Srrs /* Already have or am bring up an association */ 1000163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 1001163953Srrs SCTP_TCB_UNLOCK(stcb); 1002171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 1003163953Srrs return (EALREADY); 1004163953Srrs } 1005163953Srrs /* We are GOOD to go */ 1006171531Srrs stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id, p); 1007163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 1008163953Srrs if (stcb == NULL) { 1009163953Srrs /* Gak! no memory */ 1010163953Srrs return (error); 1011163953Srrs } 1012163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1013163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1014163953Srrs /* Set the connected flag so we can queue data */ 1015163953Srrs soisconnecting(so); 1016163953Srrs } 1017163953Srrs stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1018169420Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1019163953Srrs 1020163953Srrs /* initialize authentication parameters for the assoc */ 1021163953Srrs sctp_initialize_auth_params(inp, stcb); 1022163953Srrs 1023172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 1024163953Srrs SCTP_TCB_UNLOCK(stcb); 1025163953Srrs return error; 1026163953Srrs} 1027163953Srrs 1028163953Srrsstatic int 1029163953Srrssctp6_getaddr(struct socket *so, struct sockaddr **addr) 1030163953Srrs{ 1031163953Srrs struct sockaddr_in6 *sin6; 1032163953Srrs struct sctp_inpcb *inp; 1033167598Srrs uint32_t vrf_id; 1034167598Srrs struct sctp_ifa *sctp_ifa; 1035163953Srrs 1036163953Srrs int error; 1037163953Srrs 1038163953Srrs /* 1039163953Srrs * Do the malloc first in case it blocks. 1040163953Srrs */ 1041163953Srrs SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1042163953Srrs sin6->sin6_family = AF_INET6; 1043163953Srrs sin6->sin6_len = sizeof(*sin6); 1044163953Srrs 1045163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1046163953Srrs if (inp == NULL) { 1047163953Srrs SCTP_FREE_SONAME(sin6); 1048171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1049163953Srrs return ECONNRESET; 1050163953Srrs } 1051163953Srrs SCTP_INP_RLOCK(inp); 1052163953Srrs sin6->sin6_port = inp->sctp_lport; 1053163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1054163953Srrs /* For the bound all case you get back 0 */ 1055163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1056163953Srrs struct sctp_tcb *stcb; 1057163953Srrs struct sockaddr_in6 *sin_a6; 1058163953Srrs struct sctp_nets *net; 1059163953Srrs int fnd; 1060163953Srrs 1061163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 1062163953Srrs if (stcb == NULL) { 1063163953Srrs goto notConn6; 1064163953Srrs } 1065163953Srrs fnd = 0; 1066163953Srrs sin_a6 = NULL; 1067163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1068163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1069164085Srrs if (sin_a6 == NULL) 1070164085Srrs /* this will make coverity happy */ 1071164085Srrs continue; 1072164085Srrs 1073163953Srrs if (sin_a6->sin6_family == AF_INET6) { 1074163953Srrs fnd = 1; 1075163953Srrs break; 1076163953Srrs } 1077163953Srrs } 1078163953Srrs if ((!fnd) || (sin_a6 == NULL)) { 1079163953Srrs /* punt */ 1080163953Srrs goto notConn6; 1081163953Srrs } 1082168299Srrs vrf_id = inp->def_vrf_id; 1083168299Srrs sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1084167598Srrs if (sctp_ifa) { 1085167598Srrs sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1086167598Srrs } 1087163953Srrs } else { 1088163953Srrs /* For the bound all case you get back 0 */ 1089163953Srrs notConn6: 1090163953Srrs memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1091163953Srrs } 1092163953Srrs } else { 1093163953Srrs /* Take the first IPv6 address in the list */ 1094163953Srrs struct sctp_laddr *laddr; 1095163953Srrs int fnd = 0; 1096163953Srrs 1097163953Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1098167598Srrs if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1099163953Srrs struct sockaddr_in6 *sin_a; 1100163953Srrs 1101167598Srrs sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1102163953Srrs sin6->sin6_addr = sin_a->sin6_addr; 1103163953Srrs fnd = 1; 1104163953Srrs break; 1105163953Srrs } 1106163953Srrs } 1107163953Srrs if (!fnd) { 1108163953Srrs SCTP_FREE_SONAME(sin6); 1109163953Srrs SCTP_INP_RUNLOCK(inp); 1110171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1111163953Srrs return ENOENT; 1112163953Srrs } 1113163953Srrs } 1114163953Srrs SCTP_INP_RUNLOCK(inp); 1115163953Srrs /* Scoping things for v6 */ 1116164085Srrs if ((error = sa6_recoverscope(sin6)) != 0) { 1117164085Srrs SCTP_FREE_SONAME(sin6); 1118163953Srrs return (error); 1119164085Srrs } 1120163953Srrs (*addr) = (struct sockaddr *)sin6; 1121163953Srrs return (0); 1122163953Srrs} 1123163953Srrs 1124163953Srrsstatic int 1125163953Srrssctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1126163953Srrs{ 1127163953Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1128163953Srrs int fnd; 1129163953Srrs struct sockaddr_in6 *sin_a6; 1130163953Srrs struct sctp_inpcb *inp; 1131163953Srrs struct sctp_tcb *stcb; 1132163953Srrs struct sctp_nets *net; 1133163953Srrs 1134163953Srrs int error; 1135163953Srrs 1136163953Srrs /* 1137163953Srrs * Do the malloc first in case it blocks. 1138163953Srrs */ 1139163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1140163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1141163953Srrs /* UDP type and listeners will drop out here */ 1142171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1143163953Srrs return (ENOTCONN); 1144163953Srrs } 1145163953Srrs SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1146163953Srrs sin6->sin6_family = AF_INET6; 1147163953Srrs sin6->sin6_len = sizeof(*sin6); 1148163953Srrs 1149163953Srrs /* We must recapture incase we blocked */ 1150163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1151163953Srrs if (inp == NULL) { 1152163953Srrs SCTP_FREE_SONAME(sin6); 1153171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1154163953Srrs return ECONNRESET; 1155163953Srrs } 1156163953Srrs SCTP_INP_RLOCK(inp); 1157163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 1158169420Srrs if (stcb) { 1159163953Srrs SCTP_TCB_LOCK(stcb); 1160169420Srrs } 1161163953Srrs SCTP_INP_RUNLOCK(inp); 1162163953Srrs if (stcb == NULL) { 1163163953Srrs SCTP_FREE_SONAME(sin6); 1164171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1165163953Srrs return ECONNRESET; 1166163953Srrs } 1167163953Srrs fnd = 0; 1168163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1169163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1170163953Srrs if (sin_a6->sin6_family == AF_INET6) { 1171163953Srrs fnd = 1; 1172163953Srrs sin6->sin6_port = stcb->rport; 1173163953Srrs sin6->sin6_addr = sin_a6->sin6_addr; 1174163953Srrs break; 1175163953Srrs } 1176163953Srrs } 1177163953Srrs SCTP_TCB_UNLOCK(stcb); 1178163953Srrs if (!fnd) { 1179163953Srrs /* No IPv4 address */ 1180163953Srrs SCTP_FREE_SONAME(sin6); 1181171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1182163953Srrs return ENOENT; 1183163953Srrs } 1184163953Srrs if ((error = sa6_recoverscope(sin6)) != 0) 1185163953Srrs return (error); 1186163953Srrs *addr = (struct sockaddr *)sin6; 1187163953Srrs return (0); 1188163953Srrs} 1189163953Srrs 1190163953Srrsstatic int 1191163953Srrssctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1192163953Srrs{ 1193163953Srrs struct sockaddr *addr; 1194163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1195166086Srrs int error; 1196163953Srrs 1197171943Srrs if (inp6 == NULL) { 1198171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1199163953Srrs return EINVAL; 1200171943Srrs } 1201163953Srrs /* allow v6 addresses precedence */ 1202163953Srrs error = sctp6_getaddr(so, nam); 1203163953Srrs if (error) { 1204163953Srrs /* try v4 next if v6 failed */ 1205163953Srrs error = sctp_ingetaddr(so, nam); 1206163953Srrs if (error) { 1207163953Srrs return (error); 1208163953Srrs } 1209163953Srrs addr = *nam; 1210163953Srrs /* if I'm V6ONLY, convert it to v4-mapped */ 1211166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 1212163953Srrs struct sockaddr_in6 sin6; 1213163953Srrs 1214163953Srrs in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1215163953Srrs memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1216168709Srrs 1217163953Srrs } 1218163953Srrs } 1219163953Srrs return (error); 1220163953Srrs} 1221163953Srrs 1222163953Srrs 1223163953Srrsstatic int 1224163953Srrssctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1225163953Srrs{ 1226163953Srrs struct sockaddr *addr = *nam; 1227163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1228166086Srrs int error; 1229163953Srrs 1230171943Srrs if (inp6 == NULL) { 1231171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1232163953Srrs return EINVAL; 1233171943Srrs } 1234163953Srrs /* allow v6 addresses precedence */ 1235163953Srrs error = sctp6_peeraddr(so, nam); 1236163953Srrs if (error) { 1237163953Srrs /* try v4 next if v6 failed */ 1238163953Srrs error = sctp_peeraddr(so, nam); 1239163953Srrs if (error) { 1240163953Srrs return (error); 1241163953Srrs } 1242163953Srrs /* if I'm V6ONLY, convert it to v4-mapped */ 1243166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 1244163953Srrs struct sockaddr_in6 sin6; 1245163953Srrs 1246163953Srrs in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1247163953Srrs memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1248163953Srrs } 1249163953Srrs } 1250163953Srrs return error; 1251163953Srrs} 1252163953Srrs 1253163953Srrsstruct pr_usrreqs sctp6_usrreqs = { 1254163953Srrs .pru_abort = sctp6_abort, 1255163953Srrs .pru_accept = sctp_accept, 1256163953Srrs .pru_attach = sctp6_attach, 1257163953Srrs .pru_bind = sctp6_bind, 1258163953Srrs .pru_connect = sctp6_connect, 1259163953Srrs .pru_control = in6_control, 1260163953Srrs .pru_close = sctp6_close, 1261163953Srrs .pru_detach = sctp6_close, 1262163953Srrs .pru_sopoll = sopoll_generic, 1263163953Srrs .pru_disconnect = sctp6_disconnect, 1264163953Srrs .pru_listen = sctp_listen, 1265163953Srrs .pru_peeraddr = sctp6_getpeeraddr, 1266163953Srrs .pru_send = sctp6_send, 1267163953Srrs .pru_shutdown = sctp_shutdown, 1268163953Srrs .pru_sockaddr = sctp6_in6getaddr, 1269163953Srrs .pru_sosend = sctp_sosend, 1270163953Srrs .pru_soreceive = sctp_soreceive 1271163953Srrs}; 1272