sctp6_usrreq.c revision 172090
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 172090 2007-09-08 11:35:11Z 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 318163953Srrsvoid 319171259Sdelphijsctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 320163953Srrs{ 321163953Srrs struct sctphdr sh; 322163953Srrs struct ip6ctlparam *ip6cp = NULL; 323167598Srrs uint32_t vrf_id; 324166086Srrs int cm; 325163953Srrs 326167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 327167598Srrs 328163953Srrs if (pktdst->sa_family != AF_INET6 || 329163953Srrs pktdst->sa_len != sizeof(struct sockaddr_in6)) 330163953Srrs return; 331163953Srrs 332163953Srrs if ((unsigned)cmd >= PRC_NCMDS) 333163953Srrs return; 334163953Srrs if (PRC_IS_REDIRECT(cmd)) { 335163953Srrs d = NULL; 336163953Srrs } else if (inet6ctlerrmap[cmd] == 0) { 337163953Srrs return; 338163953Srrs } 339163953Srrs /* if the parameter is from icmp6, decode it. */ 340163953Srrs if (d != NULL) { 341163953Srrs ip6cp = (struct ip6ctlparam *)d; 342163953Srrs } else { 343163953Srrs ip6cp = (struct ip6ctlparam *)NULL; 344163953Srrs } 345163953Srrs 346163953Srrs if (ip6cp) { 347163953Srrs /* 348163953Srrs * XXX: We assume that when IPV6 is non NULL, M and OFF are 349163953Srrs * valid. 350163953Srrs */ 351163953Srrs /* check if we can safely examine src and dst ports */ 352163953Srrs struct sctp_inpcb *inp = NULL; 353163953Srrs struct sctp_tcb *stcb = NULL; 354163953Srrs struct sctp_nets *net = NULL; 355163953Srrs struct sockaddr_in6 final; 356163953Srrs 357165647Srrs if (ip6cp->ip6c_m == NULL) 358163953Srrs return; 359163953Srrs 360163953Srrs bzero(&sh, sizeof(sh)); 361163953Srrs bzero(&final, sizeof(final)); 362163953Srrs inp = NULL; 363163953Srrs net = NULL; 364163953Srrs m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 365163953Srrs (caddr_t)&sh); 366163953Srrs ip6cp->ip6c_src->sin6_port = sh.src_port; 367163953Srrs final.sin6_len = sizeof(final); 368163953Srrs final.sin6_family = AF_INET6; 369163953Srrs final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 370163953Srrs final.sin6_port = sh.dest_port; 371163953Srrs stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 372163953Srrs (struct sockaddr *)&final, 373167598Srrs &inp, &net, 1, vrf_id); 374163953Srrs /* inp's ref-count increased && stcb locked */ 375163953Srrs if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 376163953Srrs if (cmd == PRC_MSGSIZE) { 377163953Srrs sctp6_notify_mbuf(inp, 378163953Srrs ip6cp->ip6c_icmp6, 379163953Srrs &sh, 380163953Srrs stcb, 381163953Srrs net); 382163953Srrs /* inp's ref-count reduced && stcb unlocked */ 383163953Srrs } else { 384163953Srrs if (cmd == PRC_HOSTDEAD) { 385163953Srrs cm = EHOSTUNREACH; 386163953Srrs } else { 387163953Srrs cm = inet6ctlerrmap[cmd]; 388163953Srrs } 389163953Srrs sctp_notify(inp, cm, &sh, 390163953Srrs (struct sockaddr *)&final, 391163953Srrs stcb, net); 392163953Srrs /* inp's ref-count reduced && stcb unlocked */ 393163953Srrs } 394163953Srrs } else { 395163953Srrs if (PRC_IS_REDIRECT(cmd) && inp) { 396163953Srrs in6_rtchange((struct in6pcb *)inp, 397163953Srrs inet6ctlerrmap[cmd]); 398163953Srrs } 399163953Srrs if (inp) { 400163953Srrs /* reduce inp's ref-count */ 401163953Srrs SCTP_INP_WLOCK(inp); 402163953Srrs SCTP_INP_DECR_REF(inp); 403163953Srrs SCTP_INP_WUNLOCK(inp); 404163953Srrs } 405163953Srrs if (stcb) 406163953Srrs SCTP_TCB_UNLOCK(stcb); 407163953Srrs } 408163953Srrs } 409163953Srrs} 410163953Srrs 411163953Srrs/* 412163953Srrs * this routine can probably be collasped into the one in sctp_userreq.c 413163953Srrs * since they do the same thing and now we lookup with a sockaddr 414163953Srrs */ 415163953Srrsstatic int 416163953Srrssctp6_getcred(SYSCTL_HANDLER_ARGS) 417163953Srrs{ 418164085Srrs struct xucred xuc; 419163953Srrs struct sockaddr_in6 addrs[2]; 420163953Srrs struct sctp_inpcb *inp; 421163953Srrs struct sctp_nets *net; 422163953Srrs struct sctp_tcb *stcb; 423164085Srrs int error; 424167598Srrs uint32_t vrf_id; 425163953Srrs 426167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 427167598Srrs 428170587Srwatson error = priv_check(req->td, PRIV_NETINET_GETCRED); 429163953Srrs if (error) 430163953Srrs return (error); 431163953Srrs 432171943Srrs if (req->newlen != sizeof(addrs)) { 433171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 434163953Srrs return (EINVAL); 435171943Srrs } 436171943Srrs if (req->oldlen != sizeof(struct ucred)) { 437171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 438163953Srrs return (EINVAL); 439171943Srrs } 440163953Srrs error = SYSCTL_IN(req, addrs, sizeof(addrs)); 441163953Srrs if (error) 442163953Srrs return (error); 443163953Srrs 444163953Srrs stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 445163953Srrs sin6tosa(&addrs[1]), 446167598Srrs &inp, &net, 1, vrf_id); 447163953Srrs if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 448164085Srrs if ((inp != NULL) && (stcb == NULL)) { 449164085Srrs /* reduce ref-count */ 450163953Srrs SCTP_INP_WLOCK(inp); 451163953Srrs SCTP_INP_DECR_REF(inp); 452164085Srrs goto cred_can_cont; 453163953Srrs } 454171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 455164085Srrs error = ENOENT; 456163953Srrs goto out; 457163953Srrs } 458163953Srrs SCTP_TCB_UNLOCK(stcb); 459164085Srrs /* 460164085Srrs * We use the write lock here, only since in the error leg we need 461164085Srrs * it. If we used RLOCK, then we would have to 462164085Srrs * wlock/decr/unlock/rlock. Which in theory could create a hole. 463164085Srrs * Better to use higher wlock. 464164085Srrs */ 465164085Srrs SCTP_INP_WLOCK(inp); 466164085Srrscred_can_cont: 467164085Srrs error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 468164085Srrs if (error) { 469164085Srrs SCTP_INP_WUNLOCK(inp); 470164085Srrs goto out; 471164085Srrs } 472164085Srrs cru2x(inp->sctp_socket->so_cred, &xuc); 473164085Srrs SCTP_INP_WUNLOCK(inp); 474164085Srrs error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 475163953Srrsout: 476163953Srrs return (error); 477163953Srrs} 478163953Srrs 479163953SrrsSYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 480163953Srrs 0, 0, 481163953Srrs sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 482163953Srrs 483163953Srrs 484163953Srrs/* This is the same as the sctp_abort() could be made common */ 485163953Srrsstatic void 486163953Srrssctp6_abort(struct socket *so) 487163953Srrs{ 488163953Srrs struct sctp_inpcb *inp; 489163953Srrs uint32_t flags; 490163953Srrs 491163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 492163953Srrs if (inp == 0) 493163953Srrs return; 494163953Srrssctp_must_try_again: 495163953Srrs flags = inp->sctp_flags; 496163953Srrs#ifdef SCTP_LOG_CLOSING 497163953Srrs sctp_log_closing(inp, NULL, 17); 498163953Srrs#endif 499163953Srrs if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 500163953Srrs (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 501163953Srrs#ifdef SCTP_LOG_CLOSING 502163953Srrs sctp_log_closing(inp, NULL, 16); 503163953Srrs#endif 504169380Srrs sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 505169380Srrs SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 506163953Srrs SOCK_LOCK(so); 507167695Srrs SCTP_SB_CLEAR(so->so_snd); 508163953Srrs /* 509163953Srrs * same for the rcv ones, they are only here for the 510163953Srrs * accounting/select. 511163953Srrs */ 512167695Srrs SCTP_SB_CLEAR(so->so_rcv); 513167695Srrs /* Now null out the reference, we are completely detached. */ 514163953Srrs so->so_pcb = NULL; 515163953Srrs SOCK_UNLOCK(so); 516163953Srrs } else { 517163953Srrs flags = inp->sctp_flags; 518163953Srrs if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 519163953Srrs goto sctp_must_try_again; 520163953Srrs } 521163953Srrs } 522163953Srrs return; 523163953Srrs} 524163953Srrs 525163953Srrsstatic int 526163953Srrssctp6_attach(struct socket *so, int proto, struct thread *p) 527163953Srrs{ 528163953Srrs struct in6pcb *inp6; 529166086Srrs int error; 530163953Srrs struct sctp_inpcb *inp; 531170205Srrs uint32_t vrf_id = SCTP_DEFAULT_VRFID; 532163953Srrs 533163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 534171943Srrs if (inp != NULL) { 535171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 536163953Srrs return EINVAL; 537171943Srrs } 538163953Srrs if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 539167695Srrs error = SCTP_SORESERVE(so, sctp_sendspace, sctp_recvspace); 540163953Srrs if (error) 541163953Srrs return error; 542163953Srrs } 543170205Srrs error = sctp_inpcb_alloc(so, vrf_id); 544163953Srrs if (error) 545163953Srrs return error; 546163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 547170205Srrs SCTP_INP_WLOCK(inp); 548163953Srrs inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 549163953Srrs inp6 = (struct in6pcb *)inp; 550163953Srrs 551163953Srrs inp6->inp_vflag |= INP_IPV6; 552163953Srrs inp6->in6p_hops = -1; /* use kernel default */ 553163953Srrs inp6->in6p_cksum = -1; /* just to be sure */ 554163953Srrs#ifdef INET 555163953Srrs /* 556163953Srrs * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 557163953Srrs * socket as well, because the socket may be bound to an IPv6 558163953Srrs * wildcard address, which may match an IPv4-mapped IPv6 address. 559163953Srrs */ 560163953Srrs inp6->inp_ip_ttl = ip_defttl; 561163953Srrs#endif 562163953Srrs /* 563163953Srrs * Hmm what about the IPSEC stuff that is missing here but in 564163953Srrs * sctp_attach()? 565163953Srrs */ 566170205Srrs SCTP_INP_WUNLOCK(inp); 567163953Srrs return 0; 568163953Srrs} 569163953Srrs 570163953Srrsstatic int 571163953Srrssctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 572163953Srrs{ 573163953Srrs struct sctp_inpcb *inp; 574163953Srrs struct in6pcb *inp6; 575166086Srrs int error; 576163953Srrs 577163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 578171943Srrs if (inp == 0) { 579171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 580163953Srrs return EINVAL; 581171943Srrs } 582170056Srrs if (addr) { 583170056Srrs if ((addr->sa_family == AF_INET6) && 584170056Srrs (addr->sa_len != sizeof(struct sockaddr_in6))) { 585171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 586170056Srrs return EINVAL; 587170056Srrs } 588170056Srrs if ((addr->sa_family == AF_INET) && 589170056Srrs (addr->sa_len != sizeof(struct sockaddr_in))) { 590171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 591170056Srrs return EINVAL; 592170056Srrs } 593170056Srrs } 594163953Srrs inp6 = (struct in6pcb *)inp; 595163953Srrs inp6->inp_vflag &= ~INP_IPV4; 596163953Srrs inp6->inp_vflag |= INP_IPV6; 597166023Srrs if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 598163953Srrs if (addr->sa_family == AF_INET) { 599163953Srrs /* binding v4 addr to v6 socket, so reset flags */ 600163953Srrs inp6->inp_vflag |= INP_IPV4; 601163953Srrs inp6->inp_vflag &= ~INP_IPV6; 602163953Srrs } else { 603163953Srrs struct sockaddr_in6 *sin6_p; 604163953Srrs 605163953Srrs sin6_p = (struct sockaddr_in6 *)addr; 606163953Srrs 607163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 608163953Srrs inp6->inp_vflag |= INP_IPV4; 609163953Srrs } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 610163953Srrs struct sockaddr_in sin; 611163953Srrs 612163953Srrs in6_sin6_2_sin(&sin, sin6_p); 613163953Srrs inp6->inp_vflag |= INP_IPV4; 614163953Srrs inp6->inp_vflag &= ~INP_IPV6; 615171572Srrs error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 616163953Srrs return error; 617163953Srrs } 618163953Srrs } 619163953Srrs } else if (addr != NULL) { 620163953Srrs /* IPV6_V6ONLY socket */ 621163953Srrs if (addr->sa_family == AF_INET) { 622163953Srrs /* can't bind v4 addr to v6 only socket! */ 623171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 624163953Srrs return EINVAL; 625163953Srrs } else { 626163953Srrs struct sockaddr_in6 *sin6_p; 627163953Srrs 628163953Srrs sin6_p = (struct sockaddr_in6 *)addr; 629163953Srrs 630163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) 631163953Srrs /* can't bind v4-mapped addrs either! */ 632163953Srrs /* NOTE: we don't support SIIT */ 633171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 634171943Srrs return EINVAL; 635163953Srrs } 636163953Srrs } 637171572Srrs error = sctp_inpcb_bind(so, addr, NULL, p); 638163953Srrs return error; 639163953Srrs} 640163953Srrs 641163953Srrs 642163953Srrsstatic void 643163953Srrssctp6_close(struct socket *so) 644163953Srrs{ 645171990Srrs sctp_close(so); 646163953Srrs} 647163953Srrs 648167598Srrs/* This could be made common with sctp_detach() since they are identical */ 649163953Srrs 650168709Srrsstatic 651168709Srrsint 652163953Srrssctp6_disconnect(struct socket *so) 653163953Srrs{ 654171990Srrs return (sctp_disconnect(so)); 655163953Srrs} 656163953Srrs 657168709Srrs 658163953Srrsint 659163953Srrssctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 660163953Srrs struct mbuf *control, struct thread *p); 661163953Srrs 662163953Srrs 663163953Srrsstatic int 664163953Srrssctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 665163953Srrs struct mbuf *control, struct thread *p) 666163953Srrs{ 667163953Srrs struct sctp_inpcb *inp; 668163953Srrs struct inpcb *in_inp; 669163953Srrs struct in6pcb *inp6; 670163953Srrs 671163953Srrs#ifdef INET 672163953Srrs struct sockaddr_in6 *sin6; 673163953Srrs 674163953Srrs#endif /* INET */ 675163953Srrs /* No SPL needed since sctp_output does this */ 676163953Srrs 677163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 678163953Srrs if (inp == NULL) { 679163953Srrs if (control) { 680169352Srrs SCTP_RELEASE_PKT(control); 681163953Srrs control = NULL; 682163953Srrs } 683169352Srrs SCTP_RELEASE_PKT(m); 684171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 685163953Srrs return EINVAL; 686163953Srrs } 687163953Srrs in_inp = (struct inpcb *)inp; 688163953Srrs inp6 = (struct in6pcb *)inp; 689163953Srrs /* 690163953Srrs * For the TCP model we may get a NULL addr, if we are a connected 691163953Srrs * socket thats ok. 692163953Srrs */ 693163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 694163953Srrs (addr == NULL)) { 695163953Srrs goto connected_type; 696163953Srrs } 697163953Srrs if (addr == NULL) { 698169352Srrs SCTP_RELEASE_PKT(m); 699163953Srrs if (control) { 700169352Srrs SCTP_RELEASE_PKT(control); 701163953Srrs control = NULL; 702163953Srrs } 703171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 704163953Srrs return (EDESTADDRREQ); 705163953Srrs } 706163953Srrs#ifdef INET 707163953Srrs sin6 = (struct sockaddr_in6 *)addr; 708166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 709163953Srrs /* 710163953Srrs * if IPV6_V6ONLY flag, we discard datagrams destined to a 711163953Srrs * v4 addr or v4-mapped addr 712163953Srrs */ 713163953Srrs if (addr->sa_family == AF_INET) { 714171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 715163953Srrs return EINVAL; 716163953Srrs } 717163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 718171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 719163953Srrs return EINVAL; 720163953Srrs } 721163953Srrs } 722163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 723163953Srrs if (!ip6_v6only) { 724163953Srrs struct sockaddr_in sin; 725163953Srrs 726163953Srrs /* convert v4-mapped into v4 addr and send */ 727163953Srrs in6_sin6_2_sin(&sin, sin6); 728163953Srrs return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 729163953Srrs control, p); 730163953Srrs } else { 731163953Srrs /* mapped addresses aren't enabled */ 732171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 733163953Srrs return EINVAL; 734163953Srrs } 735163953Srrs } 736163953Srrs#endif /* INET */ 737163953Srrsconnected_type: 738163953Srrs /* now what about control */ 739163953Srrs if (control) { 740163953Srrs if (inp->control) { 741169420Srrs SCTP_PRINTF("huh? control set?\n"); 742169352Srrs SCTP_RELEASE_PKT(inp->control); 743163953Srrs inp->control = NULL; 744163953Srrs } 745163953Srrs inp->control = control; 746163953Srrs } 747163953Srrs /* Place the data */ 748163953Srrs if (inp->pkt) { 749165647Srrs SCTP_BUF_NEXT(inp->pkt_last) = m; 750163953Srrs inp->pkt_last = m; 751163953Srrs } else { 752163953Srrs inp->pkt_last = inp->pkt = m; 753163953Srrs } 754163953Srrs if ( 755163953Srrs /* FreeBSD and MacOSX uses a flag passed */ 756163953Srrs ((flags & PRUS_MORETOCOME) == 0) 757163953Srrs ) { 758163953Srrs /* 759163953Srrs * note with the current version this code will only be used 760163953Srrs * by OpenBSD, NetBSD and FreeBSD have methods for 761163953Srrs * re-defining sosend() to use sctp_sosend(). One can 762163953Srrs * optionaly switch back to this code (by changing back the 763163953Srrs * defininitions but this is not advisable. 764163953Srrs */ 765163953Srrs int ret; 766163953Srrs 767163953Srrs ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 768163953Srrs inp->pkt = NULL; 769163953Srrs inp->control = NULL; 770163953Srrs return (ret); 771163953Srrs } else { 772163953Srrs return (0); 773163953Srrs } 774163953Srrs} 775163953Srrs 776163953Srrsstatic int 777163953Srrssctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 778163953Srrs{ 779167598Srrs uint32_t vrf_id; 780163953Srrs int error = 0; 781163953Srrs struct sctp_inpcb *inp; 782163953Srrs struct in6pcb *inp6; 783163953Srrs struct sctp_tcb *stcb; 784163953Srrs 785163953Srrs#ifdef INET 786163953Srrs struct sockaddr_in6 *sin6; 787163953Srrs struct sockaddr_storage ss; 788163953Srrs 789163953Srrs#endif /* INET */ 790163953Srrs 791163953Srrs inp6 = (struct in6pcb *)so->so_pcb; 792163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 793163953Srrs if (inp == 0) { 794171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 795163953Srrs return (ECONNRESET); /* I made the same as TCP since we are 796163953Srrs * not setup? */ 797163953Srrs } 798170056Srrs if (addr == NULL) { 799171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 800170056Srrs return (EINVAL); 801170056Srrs } 802170056Srrs if ((addr->sa_family == AF_INET6) && (addr->sa_len != sizeof(struct sockaddr_in6))) { 803171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 804170056Srrs return (EINVAL); 805170056Srrs } 806170056Srrs if ((addr->sa_family == AF_INET) && (addr->sa_len != sizeof(struct sockaddr_in))) { 807171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 808170056Srrs return (EINVAL); 809170056Srrs } 810168299Srrs vrf_id = inp->def_vrf_id; 811163953Srrs SCTP_ASOC_CREATE_LOCK(inp); 812163953Srrs SCTP_INP_RLOCK(inp); 813163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 814163953Srrs SCTP_PCB_FLAGS_UNBOUND) { 815163953Srrs /* Bind a ephemeral port */ 816163953Srrs SCTP_INP_RUNLOCK(inp); 817163953Srrs error = sctp6_bind(so, NULL, p); 818163953Srrs if (error) { 819163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 820163953Srrs 821163953Srrs return (error); 822163953Srrs } 823163953Srrs SCTP_INP_RLOCK(inp); 824163953Srrs } 825163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 826163953Srrs (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 827163953Srrs /* We are already connected AND the TCP model */ 828163953Srrs SCTP_INP_RUNLOCK(inp); 829163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 830171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 831163953Srrs return (EADDRINUSE); 832163953Srrs } 833163953Srrs#ifdef INET 834163953Srrs sin6 = (struct sockaddr_in6 *)addr; 835166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 836163953Srrs /* 837163953Srrs * if IPV6_V6ONLY flag, ignore connections destined to a v4 838163953Srrs * addr or v4-mapped addr 839163953Srrs */ 840163953Srrs if (addr->sa_family == AF_INET) { 841163953Srrs SCTP_INP_RUNLOCK(inp); 842163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 843171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 844163953Srrs return EINVAL; 845163953Srrs } 846163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 847163953Srrs SCTP_INP_RUNLOCK(inp); 848163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 849171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 850163953Srrs return EINVAL; 851163953Srrs } 852163953Srrs } 853163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 854163953Srrs if (!ip6_v6only) { 855163953Srrs /* convert v4-mapped into v4 addr */ 856163953Srrs in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 857163953Srrs addr = (struct sockaddr *)&ss; 858163953Srrs } else { 859163953Srrs /* mapped addresses aren't enabled */ 860163953Srrs SCTP_INP_RUNLOCK(inp); 861163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 862171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 863163953Srrs return EINVAL; 864163953Srrs } 865163953Srrs } else 866163953Srrs#endif /* INET */ 867163953Srrs addr = addr; /* for true v6 address case */ 868163953Srrs 869163953Srrs /* Now do we connect? */ 870163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 871163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 872169420Srrs if (stcb) { 873163953Srrs SCTP_TCB_UNLOCK(stcb); 874169420Srrs } 875163953Srrs SCTP_INP_RUNLOCK(inp); 876163953Srrs } else { 877163953Srrs SCTP_INP_RUNLOCK(inp); 878163953Srrs SCTP_INP_WLOCK(inp); 879163953Srrs SCTP_INP_INCR_REF(inp); 880163953Srrs SCTP_INP_WUNLOCK(inp); 881163953Srrs stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 882163953Srrs if (stcb == NULL) { 883163953Srrs SCTP_INP_WLOCK(inp); 884163953Srrs SCTP_INP_DECR_REF(inp); 885163953Srrs SCTP_INP_WUNLOCK(inp); 886163953Srrs } 887163953Srrs } 888163953Srrs 889163953Srrs if (stcb != NULL) { 890163953Srrs /* Already have or am bring up an association */ 891163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 892163953Srrs SCTP_TCB_UNLOCK(stcb); 893171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 894163953Srrs return (EALREADY); 895163953Srrs } 896163953Srrs /* We are GOOD to go */ 897171531Srrs stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id, p); 898163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 899163953Srrs if (stcb == NULL) { 900163953Srrs /* Gak! no memory */ 901163953Srrs return (error); 902163953Srrs } 903163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 904163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 905163953Srrs /* Set the connected flag so we can queue data */ 906163953Srrs soisconnecting(so); 907163953Srrs } 908163953Srrs stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 909169420Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 910163953Srrs 911163953Srrs /* initialize authentication parameters for the assoc */ 912163953Srrs sctp_initialize_auth_params(inp, stcb); 913163953Srrs 914172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 915163953Srrs SCTP_TCB_UNLOCK(stcb); 916163953Srrs return error; 917163953Srrs} 918163953Srrs 919163953Srrsstatic int 920163953Srrssctp6_getaddr(struct socket *so, struct sockaddr **addr) 921163953Srrs{ 922163953Srrs struct sockaddr_in6 *sin6; 923163953Srrs struct sctp_inpcb *inp; 924167598Srrs uint32_t vrf_id; 925167598Srrs struct sctp_ifa *sctp_ifa; 926163953Srrs 927163953Srrs int error; 928163953Srrs 929163953Srrs /* 930163953Srrs * Do the malloc first in case it blocks. 931163953Srrs */ 932163953Srrs SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 933163953Srrs sin6->sin6_family = AF_INET6; 934163953Srrs sin6->sin6_len = sizeof(*sin6); 935163953Srrs 936163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 937163953Srrs if (inp == NULL) { 938163953Srrs SCTP_FREE_SONAME(sin6); 939171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 940163953Srrs return ECONNRESET; 941163953Srrs } 942163953Srrs SCTP_INP_RLOCK(inp); 943163953Srrs sin6->sin6_port = inp->sctp_lport; 944163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 945163953Srrs /* For the bound all case you get back 0 */ 946163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 947163953Srrs struct sctp_tcb *stcb; 948163953Srrs struct sockaddr_in6 *sin_a6; 949163953Srrs struct sctp_nets *net; 950163953Srrs int fnd; 951163953Srrs 952163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 953163953Srrs if (stcb == NULL) { 954163953Srrs goto notConn6; 955163953Srrs } 956163953Srrs fnd = 0; 957163953Srrs sin_a6 = NULL; 958163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 959163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 960164085Srrs if (sin_a6 == NULL) 961164085Srrs /* this will make coverity happy */ 962164085Srrs continue; 963164085Srrs 964163953Srrs if (sin_a6->sin6_family == AF_INET6) { 965163953Srrs fnd = 1; 966163953Srrs break; 967163953Srrs } 968163953Srrs } 969163953Srrs if ((!fnd) || (sin_a6 == NULL)) { 970163953Srrs /* punt */ 971163953Srrs goto notConn6; 972163953Srrs } 973168299Srrs vrf_id = inp->def_vrf_id; 974168299Srrs sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 975167598Srrs if (sctp_ifa) { 976167598Srrs sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 977167598Srrs } 978163953Srrs } else { 979163953Srrs /* For the bound all case you get back 0 */ 980163953Srrs notConn6: 981163953Srrs memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 982163953Srrs } 983163953Srrs } else { 984163953Srrs /* Take the first IPv6 address in the list */ 985163953Srrs struct sctp_laddr *laddr; 986163953Srrs int fnd = 0; 987163953Srrs 988163953Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 989167598Srrs if (laddr->ifa->address.sa.sa_family == AF_INET6) { 990163953Srrs struct sockaddr_in6 *sin_a; 991163953Srrs 992167598Srrs sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 993163953Srrs sin6->sin6_addr = sin_a->sin6_addr; 994163953Srrs fnd = 1; 995163953Srrs break; 996163953Srrs } 997163953Srrs } 998163953Srrs if (!fnd) { 999163953Srrs SCTP_FREE_SONAME(sin6); 1000163953Srrs SCTP_INP_RUNLOCK(inp); 1001171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1002163953Srrs return ENOENT; 1003163953Srrs } 1004163953Srrs } 1005163953Srrs SCTP_INP_RUNLOCK(inp); 1006163953Srrs /* Scoping things for v6 */ 1007164085Srrs if ((error = sa6_recoverscope(sin6)) != 0) { 1008164085Srrs SCTP_FREE_SONAME(sin6); 1009163953Srrs return (error); 1010164085Srrs } 1011163953Srrs (*addr) = (struct sockaddr *)sin6; 1012163953Srrs return (0); 1013163953Srrs} 1014163953Srrs 1015163953Srrsstatic int 1016163953Srrssctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1017163953Srrs{ 1018163953Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1019163953Srrs int fnd; 1020163953Srrs struct sockaddr_in6 *sin_a6; 1021163953Srrs struct sctp_inpcb *inp; 1022163953Srrs struct sctp_tcb *stcb; 1023163953Srrs struct sctp_nets *net; 1024163953Srrs 1025163953Srrs int error; 1026163953Srrs 1027163953Srrs /* 1028163953Srrs * Do the malloc first in case it blocks. 1029163953Srrs */ 1030163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1031163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1032163953Srrs /* UDP type and listeners will drop out here */ 1033171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1034163953Srrs return (ENOTCONN); 1035163953Srrs } 1036163953Srrs SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1037163953Srrs sin6->sin6_family = AF_INET6; 1038163953Srrs sin6->sin6_len = sizeof(*sin6); 1039163953Srrs 1040163953Srrs /* We must recapture incase we blocked */ 1041163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1042163953Srrs if (inp == NULL) { 1043163953Srrs SCTP_FREE_SONAME(sin6); 1044171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1045163953Srrs return ECONNRESET; 1046163953Srrs } 1047163953Srrs SCTP_INP_RLOCK(inp); 1048163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 1049169420Srrs if (stcb) { 1050163953Srrs SCTP_TCB_LOCK(stcb); 1051169420Srrs } 1052163953Srrs SCTP_INP_RUNLOCK(inp); 1053163953Srrs if (stcb == NULL) { 1054163953Srrs SCTP_FREE_SONAME(sin6); 1055171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1056163953Srrs return ECONNRESET; 1057163953Srrs } 1058163953Srrs fnd = 0; 1059163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1060163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1061163953Srrs if (sin_a6->sin6_family == AF_INET6) { 1062163953Srrs fnd = 1; 1063163953Srrs sin6->sin6_port = stcb->rport; 1064163953Srrs sin6->sin6_addr = sin_a6->sin6_addr; 1065163953Srrs break; 1066163953Srrs } 1067163953Srrs } 1068163953Srrs SCTP_TCB_UNLOCK(stcb); 1069163953Srrs if (!fnd) { 1070163953Srrs /* No IPv4 address */ 1071163953Srrs SCTP_FREE_SONAME(sin6); 1072171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1073163953Srrs return ENOENT; 1074163953Srrs } 1075163953Srrs if ((error = sa6_recoverscope(sin6)) != 0) 1076163953Srrs return (error); 1077163953Srrs *addr = (struct sockaddr *)sin6; 1078163953Srrs return (0); 1079163953Srrs} 1080163953Srrs 1081163953Srrsstatic int 1082163953Srrssctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1083163953Srrs{ 1084163953Srrs struct sockaddr *addr; 1085163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1086166086Srrs int error; 1087163953Srrs 1088171943Srrs if (inp6 == NULL) { 1089171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1090163953Srrs return EINVAL; 1091171943Srrs } 1092163953Srrs /* allow v6 addresses precedence */ 1093163953Srrs error = sctp6_getaddr(so, nam); 1094163953Srrs if (error) { 1095163953Srrs /* try v4 next if v6 failed */ 1096163953Srrs error = sctp_ingetaddr(so, nam); 1097163953Srrs if (error) { 1098163953Srrs return (error); 1099163953Srrs } 1100163953Srrs addr = *nam; 1101163953Srrs /* if I'm V6ONLY, convert it to v4-mapped */ 1102166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 1103163953Srrs struct sockaddr_in6 sin6; 1104163953Srrs 1105163953Srrs in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1106163953Srrs memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1107168709Srrs 1108163953Srrs } 1109163953Srrs } 1110163953Srrs return (error); 1111163953Srrs} 1112163953Srrs 1113163953Srrs 1114163953Srrsstatic int 1115163953Srrssctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1116163953Srrs{ 1117163953Srrs struct sockaddr *addr = *nam; 1118163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1119166086Srrs int error; 1120163953Srrs 1121171943Srrs if (inp6 == NULL) { 1122171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1123163953Srrs return EINVAL; 1124171943Srrs } 1125163953Srrs /* allow v6 addresses precedence */ 1126163953Srrs error = sctp6_peeraddr(so, nam); 1127163953Srrs if (error) { 1128163953Srrs /* try v4 next if v6 failed */ 1129163953Srrs error = sctp_peeraddr(so, nam); 1130163953Srrs if (error) { 1131163953Srrs return (error); 1132163953Srrs } 1133163953Srrs /* if I'm V6ONLY, convert it to v4-mapped */ 1134166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 1135163953Srrs struct sockaddr_in6 sin6; 1136163953Srrs 1137163953Srrs in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1138163953Srrs memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1139163953Srrs } 1140163953Srrs } 1141163953Srrs return error; 1142163953Srrs} 1143163953Srrs 1144163953Srrsstruct pr_usrreqs sctp6_usrreqs = { 1145163953Srrs .pru_abort = sctp6_abort, 1146163953Srrs .pru_accept = sctp_accept, 1147163953Srrs .pru_attach = sctp6_attach, 1148163953Srrs .pru_bind = sctp6_bind, 1149163953Srrs .pru_connect = sctp6_connect, 1150163953Srrs .pru_control = in6_control, 1151163953Srrs .pru_close = sctp6_close, 1152163953Srrs .pru_detach = sctp6_close, 1153163953Srrs .pru_sopoll = sopoll_generic, 1154163953Srrs .pru_disconnect = sctp6_disconnect, 1155163953Srrs .pru_listen = sctp_listen, 1156163953Srrs .pru_peeraddr = sctp6_getpeeraddr, 1157163953Srrs .pru_send = sctp6_send, 1158163953Srrs .pru_shutdown = sctp_shutdown, 1159163953Srrs .pru_sockaddr = sctp6_in6getaddr, 1160163953Srrs .pru_sosend = sctp_sosend, 1161163953Srrs .pru_soreceive = sctp_soreceive 1162163953Srrs}; 1163