1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3235828Stuexen * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4235828Stuexen * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5163953Srrs * 6163953Srrs * Redistribution and use in source and binary forms, with or without 7163953Srrs * modification, are permitted provided that the following conditions are met: 8163953Srrs * 9163953Srrs * a) Redistributions of source code must retain the above copyright notice, 10228653Stuexen * this list of conditions and the following disclaimer. 11163953Srrs * 12163953Srrs * b) Redistributions in binary form must reproduce the above copyright 13163953Srrs * notice, this list of conditions and the following disclaimer in 14228653Stuexen * the documentation and/or other materials provided with the distribution. 15163953Srrs * 16163953Srrs * c) Neither the name of Cisco Systems, Inc. nor the names of its 17163953Srrs * contributors may be used to endorse or promote products derived 18163953Srrs * from this software without specific prior written permission. 19163953Srrs * 20163953Srrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21163953Srrs * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22163953Srrs * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23163953Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24163953Srrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25163953Srrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26163953Srrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27163953Srrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28163953Srrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29163953Srrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30163953Srrs * THE POSSIBILITY OF SUCH DAMAGE. 31163953Srrs */ 32174510Sobrien 33163954Srrs#include <sys/cdefs.h> 34163953Srrs__FBSDID("$FreeBSD: stable/10/sys/netinet6/sctp6_usrreq.c 338985 2018-09-27 18:48:50Z gordon $"); 35163953Srrs 36166086Srrs#include <netinet/sctp_os.h> 37238501Stuexen#ifdef INET6 38163953Srrs#include <sys/proc.h> 39163953Srrs#include <netinet/sctp_pcb.h> 40163953Srrs#include <netinet/sctp_header.h> 41163953Srrs#include <netinet/sctp_var.h> 42168709Srrs#include <netinet6/sctp6_var.h> 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> 54188067Srrs#include <netinet/sctp_crc32.h> 55294142Stuexen#include <netinet/icmp6.h> 56179783Srrs#include <netinet/udp.h> 57163953Srrs 58171167Sgnn#ifdef IPSEC 59171133Sgnn#include <netipsec/ipsec.h> 60171133Sgnn#include <netipsec/ipsec6.h> 61171440Srrs#endif /* IPSEC */ 62163953Srrs 63163953Srrsextern struct protosw inetsw[]; 64163953Srrs 65163953Srrsint 66243186Stuexensctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 67163953Srrs{ 68165647Srrs struct mbuf *m; 69237569Stuexen int iphlen; 70238003Stuexen uint32_t vrf_id; 71237569Stuexen uint8_t ecn_bits; 72237715Stuexen struct sockaddr_in6 src, dst; 73163953Srrs struct ip6_hdr *ip6; 74163953Srrs struct sctphdr *sh; 75163953Srrs struct sctp_chunkhdr *ch; 76237569Stuexen int length, offset; 77211969Stuexen 78211969Stuexen#if !defined(SCTP_WITH_NO_CSUM) 79238003Stuexen uint8_t compute_crc; 80211969Stuexen 81211969Stuexen#endif 82238003Stuexen uint32_t mflowid; 83281955Shiren uint8_t mflowtype; 84284633Stuexen uint16_t fibnum; 85163953Srrs 86237569Stuexen iphlen = *offp; 87169352Srrs if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 88169352Srrs SCTP_RELEASE_PKT(*i_pak); 89237569Stuexen return (IPPROTO_DONE); 90169352Srrs } 91168709Srrs m = SCTP_HEADER_TO_CHAIN(*i_pak); 92237569Stuexen#ifdef SCTP_MBUF_LOGGING 93237569Stuexen /* Log in any input mbufs */ 94237569Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 95283708Stuexen sctp_log_mbc(m, SCTP_MBUF_INPUT); 96237569Stuexen } 97237569Stuexen#endif 98237540Stuexen#ifdef SCTP_PACKET_LOGGING 99237540Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 100237540Stuexen sctp_packet_log(m); 101237540Stuexen } 102170091Srrs#endif 103238003Stuexen SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 104254854Stuexen "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 105238003Stuexen m->m_pkthdr.len, 106238003Stuexen if_name(m->m_pkthdr.rcvif), 107254854Stuexen (int)m->m_pkthdr.csum_flags, CSUM_BITS); 108281955Shiren mflowid = m->m_pkthdr.flowid; 109281955Shiren mflowtype = M_HASHTYPE_GET(m); 110284633Stuexen fibnum = M_GETFIB(m); 111237569Stuexen SCTP_STAT_INCR(sctps_recvpackets); 112237569Stuexen SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 113237569Stuexen /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 114238003Stuexen offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 115163953Srrs ip6 = mtod(m, struct ip6_hdr *); 116237569Stuexen IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 117237569Stuexen (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 118163953Srrs if (sh == NULL) { 119163953Srrs SCTP_STAT_INCR(sctps_hdrops); 120228907Stuexen return (IPPROTO_DONE); 121163953Srrs } 122163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 123237569Stuexen offset -= sizeof(struct sctp_chunkhdr); 124237715Stuexen memset(&src, 0, sizeof(struct sockaddr_in6)); 125237715Stuexen src.sin6_family = AF_INET6; 126237715Stuexen src.sin6_len = sizeof(struct sockaddr_in6); 127237715Stuexen src.sin6_port = sh->src_port; 128237715Stuexen src.sin6_addr = ip6->ip6_src; 129237715Stuexen if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 130238003Stuexen goto out; 131237715Stuexen } 132237715Stuexen memset(&dst, 0, sizeof(struct sockaddr_in6)); 133237715Stuexen dst.sin6_family = AF_INET6; 134237715Stuexen dst.sin6_len = sizeof(struct sockaddr_in6); 135237715Stuexen dst.sin6_port = sh->dest_port; 136237715Stuexen dst.sin6_addr = ip6->ip6_dst; 137237715Stuexen if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 138238003Stuexen goto out; 139237715Stuexen } 140237715Stuexen if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) { 141163953Srrs /* XXX send icmp6 host/port unreach? */ 142238003Stuexen goto out; 143163953Srrs } 144237569Stuexen length = ntohs(ip6->ip6_plen) + iphlen; 145237569Stuexen /* Validate mbuf chain length with IP payload length. */ 146238003Stuexen if (SCTP_HEADER_LEN(m) != length) { 147237569Stuexen SCTPDBG(SCTP_DEBUG_INPUT1, 148238003Stuexen "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 149237569Stuexen SCTP_STAT_INCR(sctps_hdrops); 150238003Stuexen goto out; 151237569Stuexen } 152163953Srrs if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 153238003Stuexen goto out; 154163953Srrs } 155238003Stuexen ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 156211969Stuexen#if defined(SCTP_WITH_NO_CSUM) 157211969Stuexen SCTP_STAT_INCR(sctps_recvnocrc); 158211969Stuexen#else 159188067Srrs if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 160188067Srrs SCTP_STAT_INCR(sctps_recvhwcrc); 161238003Stuexen compute_crc = 0; 162238003Stuexen } else { 163238003Stuexen SCTP_STAT_INCR(sctps_recvswcrc); 164238003Stuexen compute_crc = 1; 165188067Srrs } 166218400Stuexen#endif 167238003Stuexen sctp_common_input_processing(&m, iphlen, offset, length, 168237715Stuexen (struct sockaddr *)&src, 169237715Stuexen (struct sockaddr *)&dst, 170238003Stuexen sh, ch, 171238003Stuexen#if !defined(SCTP_WITH_NO_CSUM) 172238003Stuexen compute_crc, 173218400Stuexen#endif 174238003Stuexen ecn_bits, 175284633Stuexen mflowtype, mflowid, fibnum, 176237049Stuexen vrf_id, port); 177238003Stuexenout: 178237569Stuexen if (m) { 179169352Srrs sctp_m_freem(m); 180237569Stuexen } 181228907Stuexen return (IPPROTO_DONE); 182163953Srrs} 183163953Srrs 184163953Srrs 185243186Stuexenint 186243186Stuexensctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 187243186Stuexen{ 188243186Stuexen return (sctp6_input_with_port(i_pak, offp, 0)); 189243186Stuexen} 190243186Stuexen 191163953Srrsstatic void 192171259Sdelphijsctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 193171259Sdelphij struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 194163953Srrs{ 195168299Srrs uint32_t nxtsz; 196163953Srrs 197163953Srrs if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 198163953Srrs (icmp6 == NULL) || (sh == NULL)) { 199163953Srrs goto out; 200163953Srrs } 201163953Srrs /* First do we even look at it? */ 202163953Srrs if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 203163953Srrs goto out; 204163953Srrs 205163953Srrs if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 206163953Srrs /* not PACKET TO BIG */ 207163953Srrs goto out; 208163953Srrs } 209163953Srrs /* 210163953Srrs * ok we need to look closely. We could even get smarter and look at 211163953Srrs * anyone that we sent to in case we get a different ICMP that tells 212163953Srrs * us there is no way to reach a host, but for this impl, all we 213163953Srrs * care about is MTU discovery. 214163953Srrs */ 215163953Srrs nxtsz = ntohl(icmp6->icmp6_mtu); 216163953Srrs /* Stop any PMTU timer */ 217283822Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, 218283822Stuexen SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 219163953Srrs 220163953Srrs /* Adjust destination size limit */ 221163953Srrs if (net->mtu > nxtsz) { 222163953Srrs net->mtu = nxtsz; 223185694Srrs if (net->port) { 224185694Srrs net->mtu -= sizeof(struct udphdr); 225185694Srrs } 226163953Srrs } 227163953Srrs /* now what about the ep? */ 228163953Srrs if (stcb->asoc.smallest_mtu > nxtsz) { 229163953Srrs struct sctp_tmit_chunk *chk; 230163953Srrs 231163953Srrs /* Adjust that too */ 232163953Srrs stcb->asoc.smallest_mtu = nxtsz; 233163953Srrs /* now off to subtract IP_DF flag if needed */ 234163953Srrs 235163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 236168299Srrs if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 237163953Srrs chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 238163953Srrs } 239163953Srrs } 240163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 241168299Srrs if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 242163953Srrs /* 243163953Srrs * For this guy we also mark for immediate 244163953Srrs * resend since we sent to big of chunk 245163953Srrs */ 246163953Srrs chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 247163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) 248163953Srrs stcb->asoc.sent_queue_retran_cnt++; 249163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 250163953Srrs chk->rec.data.doing_fast_retransmit = 0; 251163953Srrs 252163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 253163953Srrs /* Clear any time so NO RTT is being done */ 254163953Srrs chk->sent_rcv_time.tv_sec = 0; 255163953Srrs chk->sent_rcv_time.tv_usec = 0; 256163953Srrs stcb->asoc.total_flight -= chk->send_size; 257163953Srrs net->flight_size -= chk->send_size; 258163953Srrs } 259163953Srrs } 260163953Srrs } 261163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 262163953Srrsout: 263169420Srrs if (stcb) { 264163953Srrs SCTP_TCB_UNLOCK(stcb); 265169420Srrs } 266163953Srrs} 267163953Srrs 268163953Srrs 269172156Srrsvoid 270172091Srrssctp6_notify(struct sctp_inpcb *inp, 271172091Srrs struct icmp6_hdr *icmph, 272172091Srrs struct sctphdr *sh, 273172091Srrs struct sockaddr *to, 274172091Srrs struct sctp_tcb *stcb, 275172091Srrs struct sctp_nets *net) 276172091Srrs{ 277237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 278172091Srrs struct socket *so; 279172091Srrs 280172091Srrs#endif 281235360Stuexen 282172091Srrs /* protection */ 283172091Srrs if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 284172091Srrs (sh == NULL) || (to == NULL)) { 285172091Srrs if (stcb) 286172091Srrs SCTP_TCB_UNLOCK(stcb); 287172091Srrs return; 288172091Srrs } 289172091Srrs /* First job is to verify the vtag matches what I would send */ 290172091Srrs if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 291172091Srrs SCTP_TCB_UNLOCK(stcb); 292172091Srrs return; 293172091Srrs } 294172091Srrs if (icmph->icmp6_type != ICMP_UNREACH) { 295172091Srrs /* We only care about unreachable */ 296172091Srrs SCTP_TCB_UNLOCK(stcb); 297172091Srrs return; 298172091Srrs } 299172091Srrs if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 300172091Srrs (icmph->icmp6_code == ICMP_UNREACH_HOST) || 301172091Srrs (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 302172091Srrs (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 303172091Srrs (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 304172091Srrs (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 305172091Srrs (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 306172091Srrs (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 307172091Srrs 308172091Srrs /* 309172091Srrs * Hmm reachablity problems we must examine closely. If its 310172091Srrs * not reachable, we may have lost a network. Or if there is 311172091Srrs * NO protocol at the other end named SCTP. well we consider 312172091Srrs * it a OOTB abort. 313172091Srrs */ 314172091Srrs if (net->dest_state & SCTP_ADDR_REACHABLE) { 315172091Srrs /* Ok that destination is NOT reachable */ 316172091Srrs net->dest_state &= ~SCTP_ADDR_REACHABLE; 317224641Stuexen net->dest_state &= ~SCTP_ADDR_PF; 318172091Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 319235415Stuexen stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 320172091Srrs } 321172091Srrs SCTP_TCB_UNLOCK(stcb); 322172091Srrs } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 323172091Srrs (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 324172091Srrs /* 325172091Srrs * Here the peer is either playing tricks on us, including 326172091Srrs * an address that belongs to someone who does not support 327172091Srrs * SCTP OR was a userland implementation that shutdown and 328172091Srrs * now is dead. In either case treat it like a OOTB abort 329172091Srrs * with no TCB 330172091Srrs */ 331235403Stuexen sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 332237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 333172091Srrs so = SCTP_INP_SO(inp); 334172091Srrs atomic_add_int(&stcb->asoc.refcnt, 1); 335172091Srrs SCTP_TCB_UNLOCK(stcb); 336172091Srrs SCTP_SOCKET_LOCK(so, 1); 337172091Srrs SCTP_TCB_LOCK(stcb); 338172091Srrs atomic_subtract_int(&stcb->asoc.refcnt, 1); 339172091Srrs#endif 340283822Stuexen (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 341283822Stuexen SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 342237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 343172091Srrs SCTP_SOCKET_UNLOCK(so, 1); 344172091Srrs /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 345172091Srrs#endif 346172091Srrs /* no need to unlock here, since the TCB is gone */ 347172091Srrs } else { 348172091Srrs SCTP_TCB_UNLOCK(stcb); 349172091Srrs } 350172091Srrs} 351172091Srrs 352172091Srrs 353172091Srrs 354163953Srrsvoid 355171259Sdelphijsctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 356163953Srrs{ 357163953Srrs struct sctphdr sh; 358163953Srrs struct ip6ctlparam *ip6cp = NULL; 359167598Srrs uint32_t vrf_id; 360163953Srrs 361167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 362167598Srrs 363163953Srrs if (pktdst->sa_family != AF_INET6 || 364163953Srrs pktdst->sa_len != sizeof(struct sockaddr_in6)) 365163953Srrs return; 366163953Srrs 367163953Srrs if ((unsigned)cmd >= PRC_NCMDS) 368163953Srrs return; 369163953Srrs if (PRC_IS_REDIRECT(cmd)) { 370163953Srrs d = NULL; 371163953Srrs } else if (inet6ctlerrmap[cmd] == 0) { 372163953Srrs return; 373163953Srrs } 374163953Srrs /* if the parameter is from icmp6, decode it. */ 375163953Srrs if (d != NULL) { 376163953Srrs ip6cp = (struct ip6ctlparam *)d; 377163953Srrs } else { 378163953Srrs ip6cp = (struct ip6ctlparam *)NULL; 379163953Srrs } 380163953Srrs 381163953Srrs if (ip6cp) { 382163953Srrs /* 383163953Srrs * XXX: We assume that when IPV6 is non NULL, M and OFF are 384163953Srrs * valid. 385163953Srrs */ 386163953Srrs struct sctp_inpcb *inp = NULL; 387163953Srrs struct sctp_tcb *stcb = NULL; 388163953Srrs struct sctp_nets *net = NULL; 389163953Srrs struct sockaddr_in6 final; 390163953Srrs 391165647Srrs if (ip6cp->ip6c_m == NULL) 392163953Srrs return; 393163953Srrs 394293897Sglebius /* Check if we can safely examine the SCTP header. */ 395293897Sglebius if (ip6cp->ip6c_m->m_pkthdr.len < ip6cp->ip6c_off + sizeof(sh)) 396293897Sglebius return; 397293897Sglebius 398163953Srrs bzero(&sh, sizeof(sh)); 399163953Srrs bzero(&final, sizeof(final)); 400163953Srrs inp = NULL; 401163953Srrs net = NULL; 402163953Srrs m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 403163953Srrs (caddr_t)&sh); 404163953Srrs ip6cp->ip6c_src->sin6_port = sh.src_port; 405163953Srrs final.sin6_len = sizeof(final); 406163953Srrs final.sin6_family = AF_INET6; 407163953Srrs final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 408163953Srrs final.sin6_port = sh.dest_port; 409237715Stuexen stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 410237715Stuexen (struct sockaddr *)ip6cp->ip6c_src, 411167598Srrs &inp, &net, 1, vrf_id); 412163953Srrs /* inp's ref-count increased && stcb locked */ 413163953Srrs if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 414163953Srrs if (cmd == PRC_MSGSIZE) { 415163953Srrs sctp6_notify_mbuf(inp, 416163953Srrs ip6cp->ip6c_icmp6, 417163953Srrs &sh, 418163953Srrs stcb, 419163953Srrs net); 420163953Srrs /* inp's ref-count reduced && stcb unlocked */ 421163953Srrs } else { 422172091Srrs sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 423163953Srrs (struct sockaddr *)&final, 424163953Srrs stcb, net); 425163953Srrs /* inp's ref-count reduced && stcb unlocked */ 426163953Srrs } 427163953Srrs } else { 428163953Srrs if (PRC_IS_REDIRECT(cmd) && inp) { 429163953Srrs in6_rtchange((struct in6pcb *)inp, 430163953Srrs inet6ctlerrmap[cmd]); 431163953Srrs } 432163953Srrs if (inp) { 433163953Srrs /* reduce inp's ref-count */ 434163953Srrs SCTP_INP_WLOCK(inp); 435163953Srrs SCTP_INP_DECR_REF(inp); 436163953Srrs SCTP_INP_WUNLOCK(inp); 437163953Srrs } 438163953Srrs if (stcb) 439163953Srrs SCTP_TCB_UNLOCK(stcb); 440163953Srrs } 441163953Srrs } 442163953Srrs} 443163953Srrs 444163953Srrs/* 445163953Srrs * this routine can probably be collasped into the one in sctp_userreq.c 446163953Srrs * since they do the same thing and now we lookup with a sockaddr 447163953Srrs */ 448163953Srrsstatic int 449163953Srrssctp6_getcred(SYSCTL_HANDLER_ARGS) 450163953Srrs{ 451164085Srrs struct xucred xuc; 452163953Srrs struct sockaddr_in6 addrs[2]; 453163953Srrs struct sctp_inpcb *inp; 454163953Srrs struct sctp_nets *net; 455163953Srrs struct sctp_tcb *stcb; 456164085Srrs int error; 457167598Srrs uint32_t vrf_id; 458163953Srrs 459167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 460167598Srrs 461170587Srwatson error = priv_check(req->td, PRIV_NETINET_GETCRED); 462163953Srrs if (error) 463163953Srrs return (error); 464163953Srrs 465171943Srrs if (req->newlen != sizeof(addrs)) { 466171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 467163953Srrs return (EINVAL); 468171943Srrs } 469171943Srrs if (req->oldlen != sizeof(struct ucred)) { 470171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 471163953Srrs return (EINVAL); 472171943Srrs } 473163953Srrs error = SYSCTL_IN(req, addrs, sizeof(addrs)); 474163953Srrs if (error) 475163953Srrs return (error); 476163953Srrs 477237715Stuexen stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 478237715Stuexen sin6tosa(&addrs[0]), 479167598Srrs &inp, &net, 1, vrf_id); 480163953Srrs if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 481164085Srrs if ((inp != NULL) && (stcb == NULL)) { 482164085Srrs /* reduce ref-count */ 483163953Srrs SCTP_INP_WLOCK(inp); 484163953Srrs SCTP_INP_DECR_REF(inp); 485164085Srrs goto cred_can_cont; 486163953Srrs } 487171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 488164085Srrs error = ENOENT; 489163953Srrs goto out; 490163953Srrs } 491163953Srrs SCTP_TCB_UNLOCK(stcb); 492164085Srrs /* 493164085Srrs * We use the write lock here, only since in the error leg we need 494164085Srrs * it. If we used RLOCK, then we would have to 495164085Srrs * wlock/decr/unlock/rlock. Which in theory could create a hole. 496164085Srrs * Better to use higher wlock. 497164085Srrs */ 498164085Srrs SCTP_INP_WLOCK(inp); 499164085Srrscred_can_cont: 500164085Srrs error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 501164085Srrs if (error) { 502164085Srrs SCTP_INP_WUNLOCK(inp); 503164085Srrs goto out; 504164085Srrs } 505164085Srrs cru2x(inp->sctp_socket->so_cred, &xuc); 506164085Srrs SCTP_INP_WUNLOCK(inp); 507164085Srrs error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 508163953Srrsout: 509163953Srrs return (error); 510163953Srrs} 511163953Srrs 512163953SrrsSYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 513163953Srrs 0, 0, 514163953Srrs sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 515163953Srrs 516163953Srrs 517163953Srrs/* This is the same as the sctp_abort() could be made common */ 518163953Srrsstatic void 519163953Srrssctp6_abort(struct socket *so) 520163953Srrs{ 521163953Srrs struct sctp_inpcb *inp; 522163953Srrs uint32_t flags; 523163953Srrs 524163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 525233005Stuexen if (inp == NULL) { 526172091Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 527163953Srrs return; 528172091Srrs } 529163953Srrssctp_must_try_again: 530163953Srrs flags = inp->sctp_flags; 531163953Srrs#ifdef SCTP_LOG_CLOSING 532163953Srrs sctp_log_closing(inp, NULL, 17); 533163953Srrs#endif 534163953Srrs if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 535163953Srrs (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 536163953Srrs#ifdef SCTP_LOG_CLOSING 537163953Srrs sctp_log_closing(inp, NULL, 16); 538163953Srrs#endif 539169380Srrs sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 540169380Srrs SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 541163953Srrs SOCK_LOCK(so); 542167695Srrs SCTP_SB_CLEAR(so->so_snd); 543163953Srrs /* 544163953Srrs * same for the rcv ones, they are only here for the 545163953Srrs * accounting/select. 546163953Srrs */ 547167695Srrs SCTP_SB_CLEAR(so->so_rcv); 548167695Srrs /* Now null out the reference, we are completely detached. */ 549163953Srrs so->so_pcb = NULL; 550163953Srrs SOCK_UNLOCK(so); 551163953Srrs } else { 552163953Srrs flags = inp->sctp_flags; 553163953Srrs if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 554163953Srrs goto sctp_must_try_again; 555163953Srrs } 556163953Srrs } 557163953Srrs return; 558163953Srrs} 559163953Srrs 560163953Srrsstatic int 561228653Stuexensctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 562163953Srrs{ 563163953Srrs struct in6pcb *inp6; 564166086Srrs int error; 565163953Srrs struct sctp_inpcb *inp; 566170205Srrs uint32_t vrf_id = SCTP_DEFAULT_VRFID; 567163953Srrs 568163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 569171943Srrs if (inp != NULL) { 570171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 571228907Stuexen return (EINVAL); 572171943Srrs } 573163953Srrs if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 574179783Srrs error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 575163953Srrs if (error) 576228907Stuexen return (error); 577163953Srrs } 578170205Srrs error = sctp_inpcb_alloc(so, vrf_id); 579163953Srrs if (error) 580228907Stuexen return (error); 581163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 582170205Srrs SCTP_INP_WLOCK(inp); 583163953Srrs inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 584163953Srrs inp6 = (struct in6pcb *)inp; 585163953Srrs 586163953Srrs inp6->inp_vflag |= INP_IPV6; 587163953Srrs inp6->in6p_hops = -1; /* use kernel default */ 588163953Srrs inp6->in6p_cksum = -1; /* just to be sure */ 589163953Srrs#ifdef INET 590163953Srrs /* 591163953Srrs * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 592163953Srrs * socket as well, because the socket may be bound to an IPv6 593163953Srrs * wildcard address, which may match an IPv4-mapped IPv6 address. 594163953Srrs */ 595197288Srrs inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 596163953Srrs#endif 597163953Srrs /* 598163953Srrs * Hmm what about the IPSEC stuff that is missing here but in 599163953Srrs * sctp_attach()? 600163953Srrs */ 601170205Srrs SCTP_INP_WUNLOCK(inp); 602228907Stuexen return (0); 603163953Srrs} 604163953Srrs 605163953Srrsstatic int 606163953Srrssctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 607163953Srrs{ 608163953Srrs struct sctp_inpcb *inp; 609163953Srrs struct in6pcb *inp6; 610166086Srrs int error; 611338985Sgordon u_char vflagsav; 612163953Srrs 613163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 614233005Stuexen if (inp == NULL) { 615171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 616228907Stuexen return (EINVAL); 617171943Srrs } 618170056Srrs if (addr) { 619221249Stuexen switch (addr->sa_family) { 620221249Stuexen#ifdef INET 621221249Stuexen case AF_INET: 622221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in)) { 623221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 624228907Stuexen return (EINVAL); 625221249Stuexen } 626221249Stuexen break; 627221249Stuexen#endif 628221249Stuexen#ifdef INET6 629221249Stuexen case AF_INET6: 630221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in6)) { 631221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 632228907Stuexen return (EINVAL); 633221249Stuexen } 634221249Stuexen break; 635221249Stuexen#endif 636221249Stuexen default: 637171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 638228907Stuexen return (EINVAL); 639170056Srrs } 640170056Srrs } 641163953Srrs inp6 = (struct in6pcb *)inp; 642338985Sgordon vflagsav = inp6->inp_vflag; 643163953Srrs inp6->inp_vflag &= ~INP_IPV4; 644163953Srrs inp6->inp_vflag |= INP_IPV6; 645166023Srrs if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 646221249Stuexen switch (addr->sa_family) { 647221249Stuexen#ifdef INET 648221249Stuexen case AF_INET: 649163953Srrs /* binding v4 addr to v6 socket, so reset flags */ 650163953Srrs inp6->inp_vflag |= INP_IPV4; 651163953Srrs inp6->inp_vflag &= ~INP_IPV6; 652221249Stuexen break; 653221249Stuexen#endif 654221249Stuexen#ifdef INET6 655221249Stuexen case AF_INET6: 656221249Stuexen { 657221249Stuexen struct sockaddr_in6 *sin6_p; 658163953Srrs 659221249Stuexen sin6_p = (struct sockaddr_in6 *)addr; 660163953Srrs 661221249Stuexen if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 662221249Stuexen inp6->inp_vflag |= INP_IPV4; 663221249Stuexen } 664221249Stuexen#ifdef INET 665221249Stuexen if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 666221249Stuexen struct sockaddr_in sin; 667163953Srrs 668221249Stuexen in6_sin6_2_sin(&sin, sin6_p); 669221249Stuexen inp6->inp_vflag |= INP_IPV4; 670221249Stuexen inp6->inp_vflag &= ~INP_IPV6; 671221249Stuexen error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 672338985Sgordon goto out; 673221249Stuexen } 674221249Stuexen#endif 675221249Stuexen break; 676163953Srrs } 677221249Stuexen#endif 678221249Stuexen default: 679221249Stuexen break; 680163953Srrs } 681163953Srrs } else if (addr != NULL) { 682221249Stuexen struct sockaddr_in6 *sin6_p; 683221249Stuexen 684163953Srrs /* IPV6_V6ONLY socket */ 685221249Stuexen#ifdef INET 686163953Srrs if (addr->sa_family == AF_INET) { 687163953Srrs /* can't bind v4 addr to v6 only socket! */ 688171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 689338985Sgordon error = EINVAL; 690338985Sgordon goto out; 691221249Stuexen } 692221249Stuexen#endif 693221249Stuexen sin6_p = (struct sockaddr_in6 *)addr; 694163953Srrs 695221249Stuexen if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 696221249Stuexen /* can't bind v4-mapped addrs either! */ 697221249Stuexen /* NOTE: we don't support SIIT */ 698221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 699338985Sgordon error = EINVAL; 700338985Sgordon goto out; 701163953Srrs } 702163953Srrs } 703171572Srrs error = sctp_inpcb_bind(so, addr, NULL, p); 704338985Sgordonout: 705338985Sgordon if (error != 0) 706338985Sgordon inp6->inp_vflag = vflagsav; 707228907Stuexen return (error); 708163953Srrs} 709163953Srrs 710163953Srrs 711163953Srrsstatic void 712163953Srrssctp6_close(struct socket *so) 713163953Srrs{ 714171990Srrs sctp_close(so); 715163953Srrs} 716163953Srrs 717167598Srrs/* This could be made common with sctp_detach() since they are identical */ 718163953Srrs 719168709Srrsstatic 720168709Srrsint 721163953Srrssctp6_disconnect(struct socket *so) 722163953Srrs{ 723171990Srrs return (sctp_disconnect(so)); 724163953Srrs} 725163953Srrs 726168709Srrs 727163953Srrsint 728163953Srrssctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 729163953Srrs struct mbuf *control, struct thread *p); 730163953Srrs 731163953Srrs 732163953Srrsstatic int 733163953Srrssctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 734163953Srrs struct mbuf *control, struct thread *p) 735163953Srrs{ 736163953Srrs struct sctp_inpcb *inp; 737163953Srrs struct in6pcb *inp6; 738163953Srrs 739163953Srrs#ifdef INET 740163953Srrs struct sockaddr_in6 *sin6; 741163953Srrs 742163953Srrs#endif /* INET */ 743163953Srrs /* No SPL needed since sctp_output does this */ 744163953Srrs 745163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 746163953Srrs if (inp == NULL) { 747163953Srrs if (control) { 748169352Srrs SCTP_RELEASE_PKT(control); 749163953Srrs control = NULL; 750163953Srrs } 751169352Srrs SCTP_RELEASE_PKT(m); 752171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 753228907Stuexen return (EINVAL); 754163953Srrs } 755163953Srrs inp6 = (struct in6pcb *)inp; 756163953Srrs /* 757163953Srrs * For the TCP model we may get a NULL addr, if we are a connected 758163953Srrs * socket thats ok. 759163953Srrs */ 760163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 761163953Srrs (addr == NULL)) { 762163953Srrs goto connected_type; 763163953Srrs } 764163953Srrs if (addr == NULL) { 765169352Srrs SCTP_RELEASE_PKT(m); 766163953Srrs if (control) { 767169352Srrs SCTP_RELEASE_PKT(control); 768163953Srrs control = NULL; 769163953Srrs } 770171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 771163953Srrs return (EDESTADDRREQ); 772163953Srrs } 773163953Srrs#ifdef INET 774163953Srrs sin6 = (struct sockaddr_in6 *)addr; 775166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 776163953Srrs /* 777163953Srrs * if IPV6_V6ONLY flag, we discard datagrams destined to a 778163953Srrs * v4 addr or v4-mapped addr 779163953Srrs */ 780163953Srrs if (addr->sa_family == AF_INET) { 781171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 782228907Stuexen return (EINVAL); 783163953Srrs } 784163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 785171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 786228907Stuexen return (EINVAL); 787163953Srrs } 788163953Srrs } 789163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 790250466Stuexen struct sockaddr_in sin; 791163953Srrs 792250466Stuexen /* convert v4-mapped into v4 addr and send */ 793250466Stuexen in6_sin6_2_sin(&sin, sin6); 794250466Stuexen return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 795163953Srrs } 796163953Srrs#endif /* INET */ 797163953Srrsconnected_type: 798163953Srrs /* now what about control */ 799163953Srrs if (control) { 800163953Srrs if (inp->control) { 801169420Srrs SCTP_PRINTF("huh? control set?\n"); 802169352Srrs SCTP_RELEASE_PKT(inp->control); 803163953Srrs inp->control = NULL; 804163953Srrs } 805163953Srrs inp->control = control; 806163953Srrs } 807163953Srrs /* Place the data */ 808163953Srrs if (inp->pkt) { 809165647Srrs SCTP_BUF_NEXT(inp->pkt_last) = m; 810163953Srrs inp->pkt_last = m; 811163953Srrs } else { 812163953Srrs inp->pkt_last = inp->pkt = m; 813163953Srrs } 814163953Srrs if ( 815163953Srrs /* FreeBSD and MacOSX uses a flag passed */ 816163953Srrs ((flags & PRUS_MORETOCOME) == 0) 817163953Srrs ) { 818163953Srrs /* 819163953Srrs * note with the current version this code will only be used 820163953Srrs * by OpenBSD, NetBSD and FreeBSD have methods for 821163953Srrs * re-defining sosend() to use sctp_sosend(). One can 822163953Srrs * optionaly switch back to this code (by changing back the 823163953Srrs * defininitions but this is not advisable. 824163953Srrs */ 825163953Srrs int ret; 826163953Srrs 827163953Srrs ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 828163953Srrs inp->pkt = NULL; 829163953Srrs inp->control = NULL; 830163953Srrs return (ret); 831163953Srrs } else { 832163953Srrs return (0); 833163953Srrs } 834163953Srrs} 835163953Srrs 836163953Srrsstatic int 837163953Srrssctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 838163953Srrs{ 839167598Srrs uint32_t vrf_id; 840163953Srrs int error = 0; 841163953Srrs struct sctp_inpcb *inp; 842163953Srrs struct sctp_tcb *stcb; 843163953Srrs 844163953Srrs#ifdef INET 845258454Stuexen struct in6pcb *inp6; 846163953Srrs struct sockaddr_in6 *sin6; 847271746Stuexen union sctp_sockstore store; 848163953Srrs 849221249Stuexen#endif 850163953Srrs 851258454Stuexen#ifdef INET 852163953Srrs inp6 = (struct in6pcb *)so->so_pcb; 853258454Stuexen#endif 854163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 855233005Stuexen if (inp == NULL) { 856171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 857163953Srrs return (ECONNRESET); /* I made the same as TCP since we are 858163953Srrs * not setup? */ 859163953Srrs } 860170056Srrs if (addr == NULL) { 861171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 862170056Srrs return (EINVAL); 863170056Srrs } 864221249Stuexen switch (addr->sa_family) { 865221249Stuexen#ifdef INET 866221249Stuexen case AF_INET: 867221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in)) { 868221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 869221249Stuexen return (EINVAL); 870221249Stuexen } 871221249Stuexen break; 872221249Stuexen#endif 873221249Stuexen#ifdef INET6 874221249Stuexen case AF_INET6: 875221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in6)) { 876221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 877221249Stuexen return (EINVAL); 878221249Stuexen } 879221249Stuexen break; 880221249Stuexen#endif 881221249Stuexen default: 882171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 883170056Srrs return (EINVAL); 884170056Srrs } 885221249Stuexen 886168299Srrs vrf_id = inp->def_vrf_id; 887163953Srrs SCTP_ASOC_CREATE_LOCK(inp); 888163953Srrs SCTP_INP_RLOCK(inp); 889163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 890163953Srrs SCTP_PCB_FLAGS_UNBOUND) { 891163953Srrs /* Bind a ephemeral port */ 892163953Srrs SCTP_INP_RUNLOCK(inp); 893163953Srrs error = sctp6_bind(so, NULL, p); 894163953Srrs if (error) { 895163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 896163953Srrs 897163953Srrs return (error); 898163953Srrs } 899163953Srrs SCTP_INP_RLOCK(inp); 900163953Srrs } 901163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 902163953Srrs (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 903163953Srrs /* We are already connected AND the TCP model */ 904163953Srrs SCTP_INP_RUNLOCK(inp); 905163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 906171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 907163953Srrs return (EADDRINUSE); 908163953Srrs } 909163953Srrs#ifdef INET 910163953Srrs sin6 = (struct sockaddr_in6 *)addr; 911166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 912163953Srrs /* 913163953Srrs * if IPV6_V6ONLY flag, ignore connections destined to a v4 914163953Srrs * addr or v4-mapped addr 915163953Srrs */ 916163953Srrs if (addr->sa_family == AF_INET) { 917163953Srrs SCTP_INP_RUNLOCK(inp); 918163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 919171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 920228907Stuexen return (EINVAL); 921163953Srrs } 922163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 923163953Srrs SCTP_INP_RUNLOCK(inp); 924163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 925171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 926228907Stuexen return (EINVAL); 927163953Srrs } 928163953Srrs } 929163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 930250466Stuexen /* convert v4-mapped into v4 addr */ 931271746Stuexen in6_sin6_2_sin(&store.sin, sin6); 932271746Stuexen addr = &store.sa; 933221411Stuexen } 934163953Srrs#endif /* INET */ 935163953Srrs /* Now do we connect? */ 936163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 937163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 938169420Srrs if (stcb) { 939163953Srrs SCTP_TCB_UNLOCK(stcb); 940169420Srrs } 941163953Srrs SCTP_INP_RUNLOCK(inp); 942163953Srrs } else { 943163953Srrs SCTP_INP_RUNLOCK(inp); 944163953Srrs SCTP_INP_WLOCK(inp); 945163953Srrs SCTP_INP_INCR_REF(inp); 946163953Srrs SCTP_INP_WUNLOCK(inp); 947163953Srrs stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 948163953Srrs if (stcb == NULL) { 949163953Srrs SCTP_INP_WLOCK(inp); 950163953Srrs SCTP_INP_DECR_REF(inp); 951163953Srrs SCTP_INP_WUNLOCK(inp); 952163953Srrs } 953163953Srrs } 954163953Srrs 955163953Srrs if (stcb != NULL) { 956163953Srrs /* Already have or am bring up an association */ 957163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 958163953Srrs SCTP_TCB_UNLOCK(stcb); 959171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 960163953Srrs return (EALREADY); 961163953Srrs } 962163953Srrs /* We are GOOD to go */ 963294215Stuexen stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, p); 964163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 965163953Srrs if (stcb == NULL) { 966163953Srrs /* Gak! no memory */ 967163953Srrs return (error); 968163953Srrs } 969163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 970163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 971163953Srrs /* Set the connected flag so we can queue data */ 972163953Srrs soisconnecting(so); 973163953Srrs } 974163953Srrs stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 975169420Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 976163953Srrs 977163953Srrs /* initialize authentication parameters for the assoc */ 978163953Srrs sctp_initialize_auth_params(inp, stcb); 979163953Srrs 980172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 981163953Srrs SCTP_TCB_UNLOCK(stcb); 982228907Stuexen return (error); 983163953Srrs} 984163953Srrs 985163953Srrsstatic int 986163953Srrssctp6_getaddr(struct socket *so, struct sockaddr **addr) 987163953Srrs{ 988163953Srrs struct sockaddr_in6 *sin6; 989163953Srrs struct sctp_inpcb *inp; 990167598Srrs uint32_t vrf_id; 991167598Srrs struct sctp_ifa *sctp_ifa; 992163953Srrs 993163953Srrs int error; 994163953Srrs 995163953Srrs /* 996163953Srrs * Do the malloc first in case it blocks. 997163953Srrs */ 998221249Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 999211944Stuexen if (sin6 == NULL) 1000228907Stuexen return (ENOMEM); 1001163953Srrs sin6->sin6_family = AF_INET6; 1002163953Srrs sin6->sin6_len = sizeof(*sin6); 1003163953Srrs 1004163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1005163953Srrs if (inp == NULL) { 1006163953Srrs SCTP_FREE_SONAME(sin6); 1007171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1008228907Stuexen return (ECONNRESET); 1009163953Srrs } 1010163953Srrs SCTP_INP_RLOCK(inp); 1011163953Srrs sin6->sin6_port = inp->sctp_lport; 1012163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1013163953Srrs /* For the bound all case you get back 0 */ 1014163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1015163953Srrs struct sctp_tcb *stcb; 1016163953Srrs struct sockaddr_in6 *sin_a6; 1017163953Srrs struct sctp_nets *net; 1018163953Srrs int fnd; 1019163953Srrs 1020163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 1021163953Srrs if (stcb == NULL) { 1022296052Stuexen SCTP_INP_RUNLOCK(inp); 1023296052Stuexen SCTP_FREE_SONAME(sin6); 1024296052Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1025296052Stuexen return (ENOENT); 1026163953Srrs } 1027163953Srrs fnd = 0; 1028163953Srrs sin_a6 = NULL; 1029163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1030163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1031164085Srrs if (sin_a6 == NULL) 1032164085Srrs /* this will make coverity happy */ 1033164085Srrs continue; 1034164085Srrs 1035163953Srrs if (sin_a6->sin6_family == AF_INET6) { 1036163953Srrs fnd = 1; 1037163953Srrs break; 1038163953Srrs } 1039163953Srrs } 1040163953Srrs if ((!fnd) || (sin_a6 == NULL)) { 1041163953Srrs /* punt */ 1042296052Stuexen SCTP_INP_RUNLOCK(inp); 1043296052Stuexen SCTP_FREE_SONAME(sin6); 1044296052Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1045296052Stuexen return (ENOENT); 1046163953Srrs } 1047168299Srrs vrf_id = inp->def_vrf_id; 1048168299Srrs sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1049167598Srrs if (sctp_ifa) { 1050167598Srrs sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1051167598Srrs } 1052163953Srrs } else { 1053163953Srrs /* For the bound all case you get back 0 */ 1054163953Srrs memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1055163953Srrs } 1056163953Srrs } else { 1057163953Srrs /* Take the first IPv6 address in the list */ 1058163953Srrs struct sctp_laddr *laddr; 1059163953Srrs int fnd = 0; 1060163953Srrs 1061163953Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1062167598Srrs if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1063163953Srrs struct sockaddr_in6 *sin_a; 1064163953Srrs 1065271746Stuexen sin_a = &laddr->ifa->address.sin6; 1066163953Srrs sin6->sin6_addr = sin_a->sin6_addr; 1067163953Srrs fnd = 1; 1068163953Srrs break; 1069163953Srrs } 1070163953Srrs } 1071163953Srrs if (!fnd) { 1072163953Srrs SCTP_FREE_SONAME(sin6); 1073163953Srrs SCTP_INP_RUNLOCK(inp); 1074171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1075228907Stuexen return (ENOENT); 1076163953Srrs } 1077163953Srrs } 1078163953Srrs SCTP_INP_RUNLOCK(inp); 1079163953Srrs /* Scoping things for v6 */ 1080164085Srrs if ((error = sa6_recoverscope(sin6)) != 0) { 1081164085Srrs SCTP_FREE_SONAME(sin6); 1082163953Srrs return (error); 1083164085Srrs } 1084163953Srrs (*addr) = (struct sockaddr *)sin6; 1085163953Srrs return (0); 1086163953Srrs} 1087163953Srrs 1088163953Srrsstatic int 1089163953Srrssctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1090163953Srrs{ 1091231895Stuexen struct sockaddr_in6 *sin6; 1092163953Srrs int fnd; 1093163953Srrs struct sockaddr_in6 *sin_a6; 1094163953Srrs struct sctp_inpcb *inp; 1095163953Srrs struct sctp_tcb *stcb; 1096163953Srrs struct sctp_nets *net; 1097163953Srrs int error; 1098163953Srrs 1099228907Stuexen /* Do the malloc first in case it blocks. */ 1100163953Srrs SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1101211944Stuexen if (sin6 == NULL) 1102211944Stuexen return (ENOMEM); 1103163953Srrs sin6->sin6_family = AF_INET6; 1104163953Srrs sin6->sin6_len = sizeof(*sin6); 1105163953Srrs 1106163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1107228907Stuexen if ((inp == NULL) || 1108228907Stuexen ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1109228907Stuexen /* UDP type and listeners will drop out here */ 1110163953Srrs SCTP_FREE_SONAME(sin6); 1111228907Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1112228907Stuexen return (ENOTCONN); 1113163953Srrs } 1114163953Srrs SCTP_INP_RLOCK(inp); 1115163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 1116169420Srrs if (stcb) { 1117163953Srrs SCTP_TCB_LOCK(stcb); 1118169420Srrs } 1119163953Srrs SCTP_INP_RUNLOCK(inp); 1120163953Srrs if (stcb == NULL) { 1121163953Srrs SCTP_FREE_SONAME(sin6); 1122171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1123228907Stuexen return (ECONNRESET); 1124163953Srrs } 1125163953Srrs fnd = 0; 1126163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1127163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1128163953Srrs if (sin_a6->sin6_family == AF_INET6) { 1129163953Srrs fnd = 1; 1130163953Srrs sin6->sin6_port = stcb->rport; 1131163953Srrs sin6->sin6_addr = sin_a6->sin6_addr; 1132163953Srrs break; 1133163953Srrs } 1134163953Srrs } 1135163953Srrs SCTP_TCB_UNLOCK(stcb); 1136163953Srrs if (!fnd) { 1137163953Srrs /* No IPv4 address */ 1138163953Srrs SCTP_FREE_SONAME(sin6); 1139171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1140228907Stuexen return (ENOENT); 1141163953Srrs } 1142283703Stuexen if ((error = sa6_recoverscope(sin6)) != 0) { 1143283703Stuexen SCTP_FREE_SONAME(sin6); 1144283703Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1145163953Srrs return (error); 1146283703Stuexen } 1147163953Srrs *addr = (struct sockaddr *)sin6; 1148163953Srrs return (0); 1149163953Srrs} 1150163953Srrs 1151163953Srrsstatic int 1152163953Srrssctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1153163953Srrs{ 1154163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1155166086Srrs int error; 1156163953Srrs 1157171943Srrs if (inp6 == NULL) { 1158171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1159228907Stuexen return (EINVAL); 1160171943Srrs } 1161163953Srrs /* allow v6 addresses precedence */ 1162163953Srrs error = sctp6_getaddr(so, nam); 1163221249Stuexen#ifdef INET 1164163953Srrs if (error) { 1165296052Stuexen struct sockaddr_in6 *sin6; 1166296052Stuexen 1167163953Srrs /* try v4 next if v6 failed */ 1168163953Srrs error = sctp_ingetaddr(so, nam); 1169163953Srrs if (error) { 1170163953Srrs return (error); 1171163953Srrs } 1172296052Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1173296052Stuexen if (sin6 == NULL) { 1174296052Stuexen SCTP_FREE_SONAME(*nam); 1175296052Stuexen return (ENOMEM); 1176163953Srrs } 1177296052Stuexen in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1178296052Stuexen SCTP_FREE_SONAME(*nam); 1179296052Stuexen *nam = (struct sockaddr *)sin6; 1180163953Srrs } 1181221249Stuexen#endif 1182163953Srrs return (error); 1183163953Srrs} 1184163953Srrs 1185163953Srrs 1186163953Srrsstatic int 1187163953Srrssctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1188163953Srrs{ 1189163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1190166086Srrs int error; 1191163953Srrs 1192171943Srrs if (inp6 == NULL) { 1193171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1194228907Stuexen return (EINVAL); 1195171943Srrs } 1196163953Srrs /* allow v6 addresses precedence */ 1197163953Srrs error = sctp6_peeraddr(so, nam); 1198221249Stuexen#ifdef INET 1199163953Srrs if (error) { 1200296052Stuexen struct sockaddr_in6 *sin6; 1201296052Stuexen 1202163953Srrs /* try v4 next if v6 failed */ 1203163953Srrs error = sctp_peeraddr(so, nam); 1204163953Srrs if (error) { 1205163953Srrs return (error); 1206163953Srrs } 1207296052Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1208296052Stuexen if (sin6 == NULL) { 1209296052Stuexen SCTP_FREE_SONAME(*nam); 1210296052Stuexen return (ENOMEM); 1211163953Srrs } 1212296052Stuexen in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1213296052Stuexen SCTP_FREE_SONAME(*nam); 1214296052Stuexen *nam = (struct sockaddr *)sin6; 1215163953Srrs } 1216221249Stuexen#endif 1217228907Stuexen return (error); 1218163953Srrs} 1219163953Srrs 1220163953Srrsstruct pr_usrreqs sctp6_usrreqs = { 1221163953Srrs .pru_abort = sctp6_abort, 1222163953Srrs .pru_accept = sctp_accept, 1223163953Srrs .pru_attach = sctp6_attach, 1224163953Srrs .pru_bind = sctp6_bind, 1225163953Srrs .pru_connect = sctp6_connect, 1226163953Srrs .pru_control = in6_control, 1227163953Srrs .pru_close = sctp6_close, 1228163953Srrs .pru_detach = sctp6_close, 1229163953Srrs .pru_sopoll = sopoll_generic, 1230178201Srrs .pru_flush = sctp_flush, 1231163953Srrs .pru_disconnect = sctp6_disconnect, 1232163953Srrs .pru_listen = sctp_listen, 1233163953Srrs .pru_peeraddr = sctp6_getpeeraddr, 1234163953Srrs .pru_send = sctp6_send, 1235163953Srrs .pru_shutdown = sctp_shutdown, 1236163953Srrs .pru_sockaddr = sctp6_in6getaddr, 1237163953Srrs .pru_sosend = sctp_sosend, 1238163953Srrs .pru_soreceive = sctp_soreceive 1239163953Srrs}; 1240238501Stuexen 1241238501Stuexen#endif 1242