sctp_asconf.c revision 197288
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 31163953Srrs/* $KAME: sctp_asconf.c,v 1.24 2005/03/06 16:04:16 itojun Exp $ */ 32163953Srrs 33163953Srrs#include <sys/cdefs.h> 34163957Srrs__FBSDID("$FreeBSD: head/sys/netinet/sctp_asconf.c 197288 2009-09-17 15:11:12Z rrs $"); 35163953Srrs#include <netinet/sctp_os.h> 36163953Srrs#include <netinet/sctp_var.h> 37167598Srrs#include <netinet/sctp_sysctl.h> 38163953Srrs#include <netinet/sctp_pcb.h> 39163953Srrs#include <netinet/sctp_header.h> 40163953Srrs#include <netinet/sctputil.h> 41163953Srrs#include <netinet/sctp_output.h> 42163953Srrs#include <netinet/sctp_asconf.h> 43172091Srrs#include <netinet/sctp_timer.h> 44163953Srrs 45163953Srrs/* 46163953Srrs * debug flags: 47163953Srrs * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 48163953Srrs * SCTP_DEBUG_ASCONF2: detailed info 49163953Srrs */ 50163953Srrs#ifdef SCTP_DEBUG 51163953Srrs#endif /* SCTP_DEBUG */ 52163953Srrs 53163953Srrs 54169420Srrsstatic void 55163953Srrssctp_asconf_get_source_ip(struct mbuf *m, struct sockaddr *sa) 56163953Srrs{ 57163953Srrs struct ip *iph; 58163953Srrs struct sockaddr_in *sin; 59163953Srrs 60163953Srrs#ifdef INET6 61163953Srrs struct sockaddr_in6 *sin6; 62163953Srrs 63163953Srrs#endif 64163953Srrs 65163953Srrs iph = mtod(m, struct ip *); 66163953Srrs if (iph->ip_v == IPVERSION) { 67163953Srrs /* IPv4 source */ 68163953Srrs sin = (struct sockaddr_in *)sa; 69163953Srrs bzero(sin, sizeof(*sin)); 70163953Srrs sin->sin_family = AF_INET; 71163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 72163953Srrs sin->sin_port = 0; 73163953Srrs sin->sin_addr.s_addr = iph->ip_src.s_addr; 74169420Srrs return; 75163953Srrs } 76163953Srrs#ifdef INET6 77163953Srrs else if (iph->ip_v == (IPV6_VERSION >> 4)) { 78163953Srrs /* IPv6 source */ 79163953Srrs struct ip6_hdr *ip6; 80163953Srrs 81163953Srrs sin6 = (struct sockaddr_in6 *)sa; 82163953Srrs bzero(sin6, sizeof(*sin6)); 83163953Srrs sin6->sin6_family = AF_INET6; 84163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 85163953Srrs sin6->sin6_port = 0; 86163953Srrs ip6 = mtod(m, struct ip6_hdr *); 87163953Srrs sin6->sin6_addr = ip6->ip6_src; 88169420Srrs return; 89163953Srrs } 90163953Srrs#endif /* INET6 */ 91163953Srrs else 92169420Srrs return; 93163953Srrs} 94163953Srrs 95163953Srrs/* 96163953Srrs * draft-ietf-tsvwg-addip-sctp 97163953Srrs * 98163953Srrs * An ASCONF parameter queue exists per asoc which holds the pending address 99163953Srrs * operations. Lists are updated upon receipt of ASCONF-ACK. 100163953Srrs * 101171477Srrs * A restricted_addrs list exists per assoc to hold local addresses that are 102171477Srrs * not (yet) usable by the assoc as a source address. These addresses are 103171477Srrs * either pending an ASCONF operation (and exist on the ASCONF parameter 104171477Srrs * queue), or they are permanently restricted (the peer has returned an 105171477Srrs * ERROR indication to an ASCONF(ADD), or the peer does not support ASCONF). 106171477Srrs * 107163953Srrs * Deleted addresses are always immediately removed from the lists as they will 108163953Srrs * (shortly) no longer exist in the kernel. We send ASCONFs as a courtesy, 109163953Srrs * only if allowed. 110163953Srrs */ 111163953Srrs 112163953Srrs/* 113171477Srrs * ASCONF parameter processing. 114171477Srrs * response_required: set if a reply is required (eg. SUCCESS_REPORT). 115171477Srrs * returns a mbuf to an "error" response parameter or NULL/"success" if ok. 116171477Srrs * FIX: allocating this many mbufs on the fly is pretty inefficient... 117163953Srrs */ 118163953Srrsstatic struct mbuf * 119163953Srrssctp_asconf_success_response(uint32_t id) 120163953Srrs{ 121163953Srrs struct mbuf *m_reply = NULL; 122163953Srrs struct sctp_asconf_paramhdr *aph; 123163953Srrs 124163953Srrs m_reply = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_paramhdr), 125163953Srrs 0, M_DONTWAIT, 1, MT_DATA); 126163953Srrs if (m_reply == NULL) { 127169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 128169420Srrs "asconf_success_response: couldn't get mbuf!\n"); 129163953Srrs return NULL; 130163953Srrs } 131163953Srrs aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 132163953Srrs aph->correlation_id = id; 133163953Srrs aph->ph.param_type = htons(SCTP_SUCCESS_REPORT); 134163953Srrs aph->ph.param_length = sizeof(struct sctp_asconf_paramhdr); 135165647Srrs SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 136163953Srrs aph->ph.param_length = htons(aph->ph.param_length); 137163953Srrs 138163953Srrs return m_reply; 139163953Srrs} 140163953Srrs 141163953Srrsstatic struct mbuf * 142163953Srrssctp_asconf_error_response(uint32_t id, uint16_t cause, uint8_t * error_tlv, 143163953Srrs uint16_t tlv_length) 144163953Srrs{ 145163953Srrs struct mbuf *m_reply = NULL; 146163953Srrs struct sctp_asconf_paramhdr *aph; 147163953Srrs struct sctp_error_cause *error; 148163953Srrs uint8_t *tlv; 149163953Srrs 150163953Srrs m_reply = sctp_get_mbuf_for_msg((sizeof(struct sctp_asconf_paramhdr) + 151163953Srrs tlv_length + 152163953Srrs sizeof(struct sctp_error_cause)), 153163953Srrs 0, M_DONTWAIT, 1, MT_DATA); 154163953Srrs if (m_reply == NULL) { 155169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 156169420Srrs "asconf_error_response: couldn't get mbuf!\n"); 157163953Srrs return NULL; 158163953Srrs } 159163953Srrs aph = mtod(m_reply, struct sctp_asconf_paramhdr *); 160163953Srrs error = (struct sctp_error_cause *)(aph + 1); 161163953Srrs 162163953Srrs aph->correlation_id = id; 163163953Srrs aph->ph.param_type = htons(SCTP_ERROR_CAUSE_IND); 164163953Srrs error->code = htons(cause); 165163953Srrs error->length = tlv_length + sizeof(struct sctp_error_cause); 166163953Srrs aph->ph.param_length = error->length + 167163953Srrs sizeof(struct sctp_asconf_paramhdr); 168163953Srrs 169163953Srrs if (aph->ph.param_length > MLEN) { 170169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 171169420Srrs "asconf_error_response: tlv_length (%xh) too big\n", 172169420Srrs tlv_length); 173163953Srrs sctp_m_freem(m_reply); /* discard */ 174163953Srrs return NULL; 175163953Srrs } 176163953Srrs if (error_tlv != NULL) { 177163953Srrs tlv = (uint8_t *) (error + 1); 178163953Srrs memcpy(tlv, error_tlv, tlv_length); 179163953Srrs } 180165647Srrs SCTP_BUF_LEN(m_reply) = aph->ph.param_length; 181163953Srrs error->length = htons(error->length); 182163953Srrs aph->ph.param_length = htons(aph->ph.param_length); 183163953Srrs 184163953Srrs return m_reply; 185163953Srrs} 186163953Srrs 187163953Srrsstatic struct mbuf * 188163953Srrssctp_process_asconf_add_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 189163953Srrs struct sctp_tcb *stcb, int response_required) 190163953Srrs{ 191163953Srrs struct mbuf *m_reply = NULL; 192163953Srrs struct sockaddr_storage sa_source, sa_store; 193163953Srrs struct sctp_ipv4addr_param *v4addr; 194163953Srrs uint16_t param_type, param_length, aparam_length; 195163953Srrs struct sockaddr *sa; 196163953Srrs struct sockaddr_in *sin; 197163953Srrs int zero_address = 0; 198163953Srrs 199163953Srrs#ifdef INET6 200163953Srrs struct sockaddr_in6 *sin6; 201163953Srrs struct sctp_ipv6addr_param *v6addr; 202163953Srrs 203163953Srrs#endif /* INET6 */ 204163953Srrs 205163953Srrs aparam_length = ntohs(aph->ph.param_length); 206163953Srrs v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 207163953Srrs#ifdef INET6 208163953Srrs v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 209163953Srrs#endif /* INET6 */ 210163953Srrs param_type = ntohs(v4addr->ph.param_type); 211163953Srrs param_length = ntohs(v4addr->ph.param_length); 212163953Srrs 213163953Srrs sa = (struct sockaddr *)&sa_store; 214163953Srrs switch (param_type) { 215163953Srrs case SCTP_IPV4_ADDRESS: 216163953Srrs if (param_length != sizeof(struct sctp_ipv4addr_param)) { 217163953Srrs /* invalid param size */ 218163953Srrs return NULL; 219163953Srrs } 220163953Srrs sin = (struct sockaddr_in *)&sa_store; 221163953Srrs bzero(sin, sizeof(*sin)); 222163953Srrs sin->sin_family = AF_INET; 223163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 224163953Srrs sin->sin_port = stcb->rport; 225163953Srrs sin->sin_addr.s_addr = v4addr->addr; 226163953Srrs if (sin->sin_addr.s_addr == INADDR_ANY) 227163953Srrs zero_address = 1; 228169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 229169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 230163953Srrs break; 231163953Srrs case SCTP_IPV6_ADDRESS: 232163953Srrs#ifdef INET6 233163953Srrs if (param_length != sizeof(struct sctp_ipv6addr_param)) { 234163953Srrs /* invalid param size */ 235163953Srrs return NULL; 236163953Srrs } 237163953Srrs sin6 = (struct sockaddr_in6 *)&sa_store; 238163953Srrs bzero(sin6, sizeof(*sin6)); 239163953Srrs sin6->sin6_family = AF_INET6; 240163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 241163953Srrs sin6->sin6_port = stcb->rport; 242163953Srrs memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 243163953Srrs sizeof(struct in6_addr)); 244163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 245163953Srrs zero_address = 1; 246169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_add_ip: adding "); 247169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 248163953Srrs#else 249163953Srrs /* IPv6 not enabled! */ 250163953Srrs /* FIX ME: currently sends back an invalid param error */ 251163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 252163953Srrs SCTP_CAUSE_INVALID_PARAM, (uint8_t *) aph, aparam_length); 253169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 254169420Srrs "process_asconf_add_ip: v6 disabled- skipping "); 255169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 256163953Srrs return m_reply; 257169420Srrs#endif 258163953Srrs break; 259163953Srrs default: 260163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 261163953Srrs SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 262163953Srrs aparam_length); 263163953Srrs return m_reply; 264163953Srrs } /* end switch */ 265163953Srrs 266163953Srrs /* if 0.0.0.0/::0, add the source address instead */ 267179783Srrs if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 268163953Srrs sa = (struct sockaddr *)&sa_source; 269163953Srrs sctp_asconf_get_source_ip(m, sa); 270169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 271169420Srrs "process_asconf_add_ip: using source addr "); 272169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 273163953Srrs } 274163953Srrs /* add the address */ 275165220Srrs if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, 276165220Srrs SCTP_ADDR_DYNAMIC_ADDED) != 0) { 277169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 278169420Srrs "process_asconf_add_ip: error adding address\n"); 279163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 280163953Srrs SCTP_CAUSE_RESOURCE_SHORTAGE, (uint8_t *) aph, 281163953Srrs aparam_length); 282163953Srrs } else { 283163953Srrs /* notify upper layer */ 284172090Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 285163953Srrs if (response_required) { 286163953Srrs m_reply = 287163953Srrs sctp_asconf_success_response(aph->correlation_id); 288163953Srrs } 289169655Srrs sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, 290169655Srrs NULL, SCTP_FROM_SCTP_ASCONF + SCTP_LOC_1); 291169655Srrs sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 292169655Srrs stcb, NULL); 293163953Srrs } 294163953Srrs 295163953Srrs return m_reply; 296163953Srrs} 297163953Srrs 298163953Srrsstatic int 299171572Srrssctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) 300163953Srrs{ 301163953Srrs struct sctp_nets *src_net, *net; 302163953Srrs 303163953Srrs /* make sure the source address exists as a destination net */ 304163953Srrs src_net = sctp_findnet(stcb, src); 305163953Srrs if (src_net == NULL) { 306163953Srrs /* not found */ 307163953Srrs return -1; 308163953Srrs } 309163953Srrs /* delete all destination addresses except the source */ 310163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 311163953Srrs if (net != src_net) { 312163953Srrs /* delete this address */ 313163953Srrs sctp_remove_net(stcb, net); 314169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 315169420Srrs "asconf_del_remote_addrs_except: deleting "); 316169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 317169420Srrs (struct sockaddr *)&net->ro._l_addr); 318163953Srrs /* notify upper layer */ 319163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 320172090Srrs (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); 321163953Srrs } 322163953Srrs } 323163953Srrs return 0; 324163953Srrs} 325163953Srrs 326163953Srrsstatic struct mbuf * 327163953Srrssctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 328163953Srrs struct sctp_tcb *stcb, int response_required) 329163953Srrs{ 330163953Srrs struct mbuf *m_reply = NULL; 331163953Srrs struct sockaddr_storage sa_source, sa_store; 332163953Srrs struct sctp_ipv4addr_param *v4addr; 333163953Srrs uint16_t param_type, param_length, aparam_length; 334163953Srrs struct sockaddr *sa; 335163953Srrs struct sockaddr_in *sin; 336163953Srrs int zero_address = 0; 337163953Srrs int result; 338163953Srrs 339163953Srrs#ifdef INET6 340163953Srrs struct sockaddr_in6 *sin6; 341163953Srrs struct sctp_ipv6addr_param *v6addr; 342163953Srrs 343163953Srrs#endif /* INET6 */ 344163953Srrs 345163953Srrs /* get the source IP address for src and 0.0.0.0/::0 delete checks */ 346163953Srrs sctp_asconf_get_source_ip(m, (struct sockaddr *)&sa_source); 347163953Srrs 348163953Srrs aparam_length = ntohs(aph->ph.param_length); 349163953Srrs v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 350163953Srrs#ifdef INET6 351163953Srrs v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 352163953Srrs#endif /* INET6 */ 353163953Srrs param_type = ntohs(v4addr->ph.param_type); 354163953Srrs param_length = ntohs(v4addr->ph.param_length); 355163953Srrs 356163953Srrs sa = (struct sockaddr *)&sa_store; 357163953Srrs switch (param_type) { 358163953Srrs case SCTP_IPV4_ADDRESS: 359163953Srrs if (param_length != sizeof(struct sctp_ipv4addr_param)) { 360163953Srrs /* invalid param size */ 361163953Srrs return NULL; 362163953Srrs } 363163953Srrs sin = (struct sockaddr_in *)&sa_store; 364163953Srrs bzero(sin, sizeof(*sin)); 365163953Srrs sin->sin_family = AF_INET; 366163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 367163953Srrs sin->sin_port = stcb->rport; 368163953Srrs sin->sin_addr.s_addr = v4addr->addr; 369163953Srrs if (sin->sin_addr.s_addr == INADDR_ANY) 370163953Srrs zero_address = 1; 371169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 372169420Srrs "process_asconf_delete_ip: deleting "); 373169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 374163953Srrs break; 375163953Srrs case SCTP_IPV6_ADDRESS: 376163953Srrs if (param_length != sizeof(struct sctp_ipv6addr_param)) { 377163953Srrs /* invalid param size */ 378163953Srrs return NULL; 379163953Srrs } 380163953Srrs#ifdef INET6 381163953Srrs sin6 = (struct sockaddr_in6 *)&sa_store; 382163953Srrs bzero(sin6, sizeof(*sin6)); 383163953Srrs sin6->sin6_family = AF_INET6; 384163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 385163953Srrs sin6->sin6_port = stcb->rport; 386163953Srrs memcpy(&sin6->sin6_addr, v6addr->addr, 387163953Srrs sizeof(struct in6_addr)); 388163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 389163953Srrs zero_address = 1; 390169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 391169420Srrs "process_asconf_delete_ip: deleting "); 392169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 393163953Srrs#else 394163953Srrs /* IPv6 not enabled! No "action" needed; just ack it */ 395169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 396169420Srrs "process_asconf_delete_ip: v6 disabled- ignoring: "); 397169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 398163953Srrs /* just respond with a "success" ASCONF-ACK */ 399163953Srrs return NULL; 400169420Srrs#endif 401163953Srrs break; 402163953Srrs default: 403163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 404163953Srrs SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 405163953Srrs aparam_length); 406163953Srrs return m_reply; 407163953Srrs } 408163953Srrs 409163953Srrs /* make sure the source address is not being deleted */ 410163953Srrs if (sctp_cmpaddr(sa, (struct sockaddr *)&sa_source)) { 411163953Srrs /* trying to delete the source address! */ 412169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 413163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 414163953Srrs SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 415163953Srrs aparam_length); 416163953Srrs return m_reply; 417163953Srrs } 418163953Srrs /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 419179783Srrs if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 420163953Srrs result = sctp_asconf_del_remote_addrs_except(stcb, 421163953Srrs (struct sockaddr *)&sa_source); 422163953Srrs 423163953Srrs if (result) { 424163953Srrs /* src address did not exist? */ 425169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 426163953Srrs /* what error to reply with?? */ 427163953Srrs m_reply = 428163953Srrs sctp_asconf_error_response(aph->correlation_id, 429163953Srrs SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 430163953Srrs aparam_length); 431163953Srrs } else if (response_required) { 432163953Srrs m_reply = 433163953Srrs sctp_asconf_success_response(aph->correlation_id); 434163953Srrs } 435163953Srrs return m_reply; 436163953Srrs } 437163953Srrs /* delete the address */ 438163953Srrs result = sctp_del_remote_addr(stcb, sa); 439163953Srrs /* 440163953Srrs * note if result == -2, the address doesn't exist in the asoc but 441163953Srrs * since it's being deleted anyways, we just ack the delete -- but 442163953Srrs * this probably means something has already gone awry 443163953Srrs */ 444163953Srrs if (result == -1) { 445163953Srrs /* only one address in the asoc */ 446169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 447163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 448163953Srrs SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 449163953Srrs aparam_length); 450163953Srrs } else { 451163953Srrs if (response_required) { 452163953Srrs m_reply = sctp_asconf_success_response(aph->correlation_id); 453163953Srrs } 454163953Srrs /* notify upper layer */ 455172090Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 456163953Srrs } 457163953Srrs return m_reply; 458163953Srrs} 459163953Srrs 460163953Srrsstatic struct mbuf * 461163953Srrssctp_process_asconf_set_primary(struct mbuf *m, 462171572Srrs struct sctp_asconf_paramhdr *aph, 463171572Srrs struct sctp_tcb *stcb, int response_required) 464163953Srrs{ 465163953Srrs struct mbuf *m_reply = NULL; 466163953Srrs struct sockaddr_storage sa_source, sa_store; 467163953Srrs struct sctp_ipv4addr_param *v4addr; 468163953Srrs uint16_t param_type, param_length, aparam_length; 469163953Srrs struct sockaddr *sa; 470163953Srrs struct sockaddr_in *sin; 471163953Srrs int zero_address = 0; 472163953Srrs 473163953Srrs#ifdef INET6 474163953Srrs struct sockaddr_in6 *sin6; 475163953Srrs struct sctp_ipv6addr_param *v6addr; 476163953Srrs 477163953Srrs#endif /* INET6 */ 478163953Srrs 479163953Srrs aparam_length = ntohs(aph->ph.param_length); 480163953Srrs v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 481163953Srrs#ifdef INET6 482163953Srrs v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 483163953Srrs#endif /* INET6 */ 484163953Srrs param_type = ntohs(v4addr->ph.param_type); 485163953Srrs param_length = ntohs(v4addr->ph.param_length); 486163953Srrs 487163953Srrs sa = (struct sockaddr *)&sa_store; 488163953Srrs switch (param_type) { 489163953Srrs case SCTP_IPV4_ADDRESS: 490163953Srrs if (param_length != sizeof(struct sctp_ipv4addr_param)) { 491163953Srrs /* invalid param size */ 492163953Srrs return NULL; 493163953Srrs } 494163953Srrs sin = (struct sockaddr_in *)&sa_store; 495163953Srrs bzero(sin, sizeof(*sin)); 496163953Srrs sin->sin_family = AF_INET; 497163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 498163953Srrs sin->sin_addr.s_addr = v4addr->addr; 499163953Srrs if (sin->sin_addr.s_addr == INADDR_ANY) 500163953Srrs zero_address = 1; 501169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 502169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 503163953Srrs break; 504163953Srrs case SCTP_IPV6_ADDRESS: 505163953Srrs if (param_length != sizeof(struct sctp_ipv6addr_param)) { 506163953Srrs /* invalid param size */ 507163953Srrs return NULL; 508163953Srrs } 509163953Srrs#ifdef INET6 510163953Srrs sin6 = (struct sockaddr_in6 *)&sa_store; 511163953Srrs bzero(sin6, sizeof(*sin6)); 512163953Srrs sin6->sin6_family = AF_INET6; 513163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 514163953Srrs memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 515163953Srrs sizeof(struct in6_addr)); 516163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 517163953Srrs zero_address = 1; 518169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 519169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 520163953Srrs#else 521163953Srrs /* IPv6 not enabled! No "action" needed; just ack it */ 522169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 523169420Srrs "process_asconf_set_primary: v6 disabled- ignoring: "); 524169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 525163953Srrs /* just respond with a "success" ASCONF-ACK */ 526163953Srrs return NULL; 527169420Srrs#endif 528163953Srrs break; 529163953Srrs default: 530163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 531163953Srrs SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 532163953Srrs aparam_length); 533163953Srrs return m_reply; 534163953Srrs } 535163953Srrs 536163953Srrs /* if 0.0.0.0/::0, use the source address instead */ 537179783Srrs if (zero_address && SCTP_BASE_SYSCTL(sctp_nat_friendly)) { 538163953Srrs sa = (struct sockaddr *)&sa_source; 539163953Srrs sctp_asconf_get_source_ip(m, sa); 540169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 541169420Srrs "process_asconf_set_primary: using source addr "); 542169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 543163953Srrs } 544163953Srrs /* set the primary address */ 545163953Srrs if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 546169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 547169420Srrs "process_asconf_set_primary: primary address set\n"); 548163953Srrs /* notify upper layer */ 549172090Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa, SCTP_SO_NOT_LOCKED); 550163953Srrs 551163953Srrs if (response_required) { 552163953Srrs m_reply = sctp_asconf_success_response(aph->correlation_id); 553163953Srrs } 554172091Srrs /* 555172091Srrs * Mobility adaptation. Ideally, when the reception of SET 556172091Srrs * PRIMARY with DELETE IP ADDRESS of the previous primary 557172091Srrs * destination, unacknowledged DATA are retransmitted 558172091Srrs * immediately to the new primary destination for seamless 559172091Srrs * handover. If the destination is UNCONFIRMED and marked 560172091Srrs * to REQ_PRIM, The retransmission occur when reception of 561172091Srrs * the HEARTBEAT-ACK. (See sctp_handle_heartbeat_ack in 562172091Srrs * sctp_input.c) Also, when change of the primary 563172091Srrs * destination, it is better that all subsequent new DATA 564172091Srrs * containing already queued DATA are transmitted to the new 565172091Srrs * primary destination. (by micchie) 566172091Srrs */ 567172091Srrs if ((sctp_is_mobility_feature_on(stcb->sctp_ep, 568172091Srrs SCTP_MOBILITY_BASE) || 569172091Srrs sctp_is_mobility_feature_on(stcb->sctp_ep, 570172091Srrs SCTP_MOBILITY_FASTHANDOFF)) && 571172091Srrs sctp_is_mobility_feature_on(stcb->sctp_ep, 572172091Srrs SCTP_MOBILITY_PRIM_DELETED) && 573172091Srrs (stcb->asoc.primary_destination->dest_state & 574172091Srrs SCTP_ADDR_UNCONFIRMED) == 0) { 575172091Srrs 576172091Srrs sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7); 577172091Srrs if (sctp_is_mobility_feature_on(stcb->sctp_ep, 578172091Srrs SCTP_MOBILITY_FASTHANDOFF)) { 579172091Srrs sctp_assoc_immediate_retrans(stcb, 580172091Srrs stcb->asoc.primary_destination); 581172091Srrs } 582172091Srrs if (sctp_is_mobility_feature_on(stcb->sctp_ep, 583172091Srrs SCTP_MOBILITY_BASE)) { 584172091Srrs sctp_move_chunks_from_deleted_prim(stcb, 585172091Srrs stcb->asoc.primary_destination); 586172091Srrs } 587172091Srrs sctp_delete_prim_timer(stcb->sctp_ep, stcb, 588172091Srrs stcb->asoc.deleted_primary); 589172091Srrs } 590163953Srrs } else { 591163953Srrs /* couldn't set the requested primary address! */ 592169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 593169420Srrs "process_asconf_set_primary: set primary failed!\n"); 594163953Srrs /* must have been an invalid address, so report */ 595163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 596163953Srrs SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 597163953Srrs aparam_length); 598163953Srrs } 599163953Srrs 600163953Srrs return m_reply; 601163953Srrs} 602163953Srrs 603163953Srrs/* 604163953Srrs * handles an ASCONF chunk. 605163953Srrs * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 606163953Srrs */ 607163953Srrsvoid 608163953Srrssctp_handle_asconf(struct mbuf *m, unsigned int offset, 609171990Srrs struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, 610171990Srrs int first) 611163953Srrs{ 612163953Srrs struct sctp_association *asoc; 613163953Srrs uint32_t serial_num; 614171990Srrs struct mbuf *n, *m_ack, *m_result, *m_tail; 615163953Srrs struct sctp_asconf_ack_chunk *ack_cp; 616163953Srrs struct sctp_asconf_paramhdr *aph, *ack_aph; 617163953Srrs struct sctp_ipv6addr_param *p_addr; 618163953Srrs unsigned int asconf_limit; 619163953Srrs int error = 0; /* did an error occur? */ 620163953Srrs 621163953Srrs /* asconf param buffer */ 622166675Srrs uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 623171990Srrs struct sctp_asconf_ack *ack, *ack_next; 624163953Srrs 625163953Srrs /* verify minimum length */ 626163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 627169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 628169420Srrs "handle_asconf: chunk too small = %xh\n", 629169420Srrs ntohs(cp->ch.chunk_length)); 630163953Srrs return; 631163953Srrs } 632163953Srrs asoc = &stcb->asoc; 633163953Srrs serial_num = ntohl(cp->serial_number); 634163953Srrs 635171990Srrs if (compare_with_wrap(asoc->asconf_seq_in, serial_num, MAX_SEQ) || 636171990Srrs serial_num == asoc->asconf_seq_in) { 637163953Srrs /* got a duplicate ASCONF */ 638169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 639169420Srrs "handle_asconf: got duplicate serial number = %xh\n", 640169420Srrs serial_num); 641163953Srrs return; 642163953Srrs } else if (serial_num != (asoc->asconf_seq_in + 1)) { 643169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 644169420Srrs serial_num, asoc->asconf_seq_in + 1); 645163953Srrs return; 646163953Srrs } 647163953Srrs /* it's the expected "next" sequence number, so process it */ 648163953Srrs asoc->asconf_seq_in = serial_num; /* update sequence */ 649163953Srrs /* get length of all the param's in the ASCONF */ 650163953Srrs asconf_limit = offset + ntohs(cp->ch.chunk_length); 651169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 652169420Srrs "handle_asconf: asconf_limit=%u, sequence=%xh\n", 653169420Srrs asconf_limit, serial_num); 654171990Srrs 655171990Srrs if (first) { 656171990Srrs /* delete old cache */ 657171990Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: Now processing firstASCONF. Try to delte old cache\n"); 658171990Srrs 659171990Srrs ack = TAILQ_FIRST(&stcb->asoc.asconf_ack_sent); 660171990Srrs while (ack != NULL) { 661171990Srrs ack_next = TAILQ_NEXT(ack, next); 662171990Srrs if (ack->serial_number == serial_num) 663171990Srrs break; 664171990Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: delete old(%u) < first(%u)\n", 665171990Srrs ack->serial_number, serial_num); 666171990Srrs TAILQ_REMOVE(&stcb->asoc.asconf_ack_sent, ack, next); 667171990Srrs if (ack->data != NULL) { 668171990Srrs sctp_m_freem(ack->data); 669171990Srrs } 670179783Srrs SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), ack); 671171990Srrs ack = ack_next; 672171990Srrs } 673163953Srrs } 674165647Srrs m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 675163953Srrs M_DONTWAIT, 1, MT_DATA); 676163953Srrs if (m_ack == NULL) { 677169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 678169420Srrs "handle_asconf: couldn't get mbuf!\n"); 679163953Srrs return; 680163953Srrs } 681163953Srrs m_tail = m_ack; /* current reply chain's tail */ 682163953Srrs 683163953Srrs /* fill in ASCONF-ACK header */ 684163953Srrs ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 685163953Srrs ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 686163953Srrs ack_cp->ch.chunk_flags = 0; 687163953Srrs ack_cp->serial_number = htonl(serial_num); 688163953Srrs /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 689165647Srrs SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 690163953Srrs ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 691163953Srrs 692163953Srrs /* skip the lookup address parameter */ 693163953Srrs offset += sizeof(struct sctp_asconf_chunk); 694163953Srrs p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 695163953Srrs if (p_addr == NULL) { 696169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 697169420Srrs "handle_asconf: couldn't get lookup addr!\n"); 698163953Srrs /* respond with a missing/invalid mandatory parameter error */ 699163953Srrs return; 700163953Srrs } 701163953Srrs /* param_length is already validated in process_control... */ 702163953Srrs offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 703163953Srrs 704163953Srrs /* get pointer to first asconf param in ASCONF-ACK */ 705163953Srrs ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk)); 706163953Srrs if (ack_aph == NULL) { 707169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n"); 708163953Srrs return; 709163953Srrs } 710163953Srrs /* get pointer to first asconf param in ASCONF */ 711163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 712163953Srrs if (aph == NULL) { 713169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 714163953Srrs goto send_reply; 715163953Srrs } 716163953Srrs /* process through all parameters */ 717163953Srrs while (aph != NULL) { 718163953Srrs unsigned int param_length, param_type; 719163953Srrs 720163953Srrs param_type = ntohs(aph->ph.param_type); 721163953Srrs param_length = ntohs(aph->ph.param_length); 722163953Srrs if (offset + param_length > asconf_limit) { 723163953Srrs /* parameter goes beyond end of chunk! */ 724163953Srrs sctp_m_freem(m_ack); 725163953Srrs return; 726163953Srrs } 727163953Srrs m_result = NULL; 728163953Srrs 729163953Srrs if (param_length > sizeof(aparam_buf)) { 730169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 731163953Srrs sctp_m_freem(m_ack); 732163953Srrs return; 733163953Srrs } 734163953Srrs if (param_length <= sizeof(struct sctp_paramhdr)) { 735169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 736163953Srrs sctp_m_freem(m_ack); 737163953Srrs } 738163953Srrs /* get the entire parameter */ 739163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 740163953Srrs if (aph == NULL) { 741169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 742163953Srrs sctp_m_freem(m_ack); 743163953Srrs return; 744163953Srrs } 745163953Srrs switch (param_type) { 746163953Srrs case SCTP_ADD_IP_ADDRESS: 747163953Srrs asoc->peer_supports_asconf = 1; 748163953Srrs m_result = sctp_process_asconf_add_ip(m, aph, stcb, 749163953Srrs error); 750163953Srrs break; 751163953Srrs case SCTP_DEL_IP_ADDRESS: 752163953Srrs asoc->peer_supports_asconf = 1; 753163953Srrs m_result = sctp_process_asconf_delete_ip(m, aph, stcb, 754163953Srrs error); 755163953Srrs break; 756163953Srrs case SCTP_ERROR_CAUSE_IND: 757163953Srrs /* not valid in an ASCONF chunk */ 758163953Srrs break; 759163953Srrs case SCTP_SET_PRIM_ADDR: 760163953Srrs asoc->peer_supports_asconf = 1; 761163953Srrs m_result = sctp_process_asconf_set_primary(m, aph, 762163953Srrs stcb, error); 763163953Srrs break; 764185694Srrs case SCTP_NAT_VTAGS: 765185694Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: sees a NAT VTAG state parameter\n"); 766185694Srrs break; 767163953Srrs case SCTP_SUCCESS_REPORT: 768163953Srrs /* not valid in an ASCONF chunk */ 769163953Srrs break; 770163953Srrs case SCTP_ULP_ADAPTATION: 771163953Srrs /* FIX */ 772163953Srrs break; 773163953Srrs default: 774163953Srrs if ((param_type & 0x8000) == 0) { 775163953Srrs /* Been told to STOP at this param */ 776163953Srrs asconf_limit = offset; 777163953Srrs /* 778163953Srrs * FIX FIX - We need to call 779163953Srrs * sctp_arethere_unrecognized_parameters() 780163953Srrs * to get a operr and send it for any 781163953Srrs * param's with the 0x4000 bit set OR do it 782163953Srrs * here ourselves... note we still must STOP 783163953Srrs * if the 0x8000 bit is clear. 784163953Srrs */ 785163953Srrs } 786163953Srrs /* unknown/invalid param type */ 787163953Srrs break; 788163953Srrs } /* switch */ 789163953Srrs 790163953Srrs /* add any (error) result to the reply mbuf chain */ 791163953Srrs if (m_result != NULL) { 792165647Srrs SCTP_BUF_NEXT(m_tail) = m_result; 793163953Srrs m_tail = m_result; 794163953Srrs /* update lengths, make sure it's aligned too */ 795165647Srrs SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 796165647Srrs ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 797163953Srrs /* set flag to force success reports */ 798163953Srrs error = 1; 799163953Srrs } 800163953Srrs offset += SCTP_SIZE32(param_length); 801163953Srrs /* update remaining ASCONF message length to process */ 802163953Srrs if (offset >= asconf_limit) { 803163953Srrs /* no more data in the mbuf chain */ 804163953Srrs break; 805163953Srrs } 806163953Srrs /* get pointer to next asconf param */ 807163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 808163953Srrs sizeof(struct sctp_asconf_paramhdr), 809163953Srrs (uint8_t *) & aparam_buf); 810163953Srrs if (aph == NULL) { 811163953Srrs /* can't get an asconf paramhdr */ 812169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 813163953Srrs /* FIX ME - add error here... */ 814163953Srrs } 815169420Srrs } 816163953Srrs 817163953Srrssend_reply: 818163953Srrs ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 819163953Srrs /* save the ASCONF-ACK reply */ 820179783Srrs ack = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asconf_ack), 821171990Srrs struct sctp_asconf_ack); 822171990Srrs if (ack == NULL) { 823171990Srrs sctp_m_freem(m_ack); 824171990Srrs return; 825171990Srrs } 826171990Srrs ack->serial_number = serial_num; 827171990Srrs ack->last_sent_to = NULL; 828171990Srrs ack->data = m_ack; 829171990Srrs n = m_ack; 830171990Srrs while (n) { 831171990Srrs ack->len += SCTP_BUF_LEN(n); 832171990Srrs n = SCTP_BUF_NEXT(n); 833171990Srrs } 834171990Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_ack_sent, ack, next); 835163953Srrs 836163953Srrs /* see if last_control_chunk_from is set properly (use IP src addr) */ 837163953Srrs if (stcb->asoc.last_control_chunk_from == NULL) { 838163953Srrs /* 839163953Srrs * this could happen if the source address was just newly 840163953Srrs * added 841163953Srrs */ 842163953Srrs struct ip *iph; 843163953Srrs struct sctphdr *sh; 844163953Srrs struct sockaddr_storage from_store; 845163953Srrs struct sockaddr *from = (struct sockaddr *)&from_store; 846163953Srrs 847169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 848163953Srrs /* pullup already done, IP options already stripped */ 849163953Srrs iph = mtod(m, struct ip *); 850163953Srrs sh = (struct sctphdr *)((caddr_t)iph + sizeof(*iph)); 851178251Srrs switch (iph->ip_v) { 852178251Srrs case IPVERSION: 853178251Srrs { 854178251Srrs struct sockaddr_in *from4; 855163953Srrs 856178251Srrs from4 = (struct sockaddr_in *)&from_store; 857178251Srrs bzero(from4, sizeof(*from4)); 858178251Srrs from4->sin_family = AF_INET; 859178251Srrs from4->sin_len = sizeof(struct sockaddr_in); 860178251Srrs from4->sin_addr.s_addr = iph->ip_src.s_addr; 861178251Srrs from4->sin_port = sh->src_port; 862178251Srrs break; 863178251Srrs } 864178251Srrs#ifdef INET6 865178251Srrs case IPV6_VERSION >> 4: 866178251Srrs { 867178251Srrs struct ip6_hdr *ip6; 868178251Srrs struct sockaddr_in6 *from6; 869163953Srrs 870178251Srrs ip6 = mtod(m, struct ip6_hdr *); 871178251Srrs from6 = (struct sockaddr_in6 *)&from_store; 872178251Srrs bzero(from6, sizeof(*from6)); 873178251Srrs from6->sin6_family = AF_INET6; 874178251Srrs from6->sin6_len = sizeof(struct sockaddr_in6); 875178251Srrs from6->sin6_addr = ip6->ip6_src; 876178251Srrs from6->sin6_port = sh->src_port; 877178251Srrs /* 878178251Srrs * Get the scopes in properly to the sin6 879178251Srrs * addr's 880178251Srrs */ 881178251Srrs /* we probably don't need these operations */ 882178251Srrs (void)sa6_recoverscope(from6); 883180387Srrs sa6_embedscope(from6, 884197288Srrs MODULE_GLOBAL(ip6_use_defzone)); 885180387Srrs 886178251Srrs break; 887178251Srrs } 888178251Srrs#endif 889178251Srrs default: 890163953Srrs /* unknown address type */ 891163953Srrs from = NULL; 892163953Srrs } 893163953Srrs if (from != NULL) { 894169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 895169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, from); 896163953Srrs /* look up the from address */ 897163953Srrs stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, from); 898163953Srrs#ifdef SCTP_DEBUG 899169420Srrs if (stcb->asoc.last_control_chunk_from == NULL) 900169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 901169420Srrs#endif 902163953Srrs } 903163953Srrs } 904163953Srrs} 905163953Srrs 906163953Srrs/* 907163953Srrs * does the address match? returns 0 if not, 1 if so 908163953Srrs */ 909163953Srrsstatic uint32_t 910163953Srrssctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 911163953Srrs{ 912163953Srrs#ifdef INET6 913163953Srrs if (sa->sa_family == AF_INET6) { 914163953Srrs /* IPv6 sa address */ 915163953Srrs /* XXX scopeid */ 916163953Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 917163953Srrs 918163953Srrs if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 919163953Srrs (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 920163953Srrs sizeof(struct in6_addr)) == 0)) { 921163953Srrs return (1); 922163953Srrs } 923163953Srrs } else 924163953Srrs#endif /* INET6 */ 925163953Srrs if (sa->sa_family == AF_INET) { 926163953Srrs /* IPv4 sa address */ 927163953Srrs struct sockaddr_in *sin = (struct sockaddr_in *)sa; 928163953Srrs 929163953Srrs if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 930163953Srrs (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 931163953Srrs sizeof(struct in_addr)) == 0)) { 932163953Srrs return (1); 933163953Srrs } 934163953Srrs } 935163953Srrs return (0); 936163953Srrs} 937163953Srrs 938163953Srrs/* 939179157Srrs * does the address match? returns 0 if not, 1 if so 940179157Srrs */ 941179157Srrsstatic uint32_t 942179157Srrssctp_addr_match( 943179157Srrs struct sctp_ipv6addr_param *v6addr, 944179157Srrs struct sockaddr *sa) 945179157Srrs{ 946179157Srrs uint16_t param_type, param_length; 947180955Srrs struct sctp_ipv4addr_param *v4addr = (struct sctp_ipv4addr_param *)v6addr; 948179157Srrs 949179157Srrs#ifdef INET6 950179157Srrs if (sa->sa_family == AF_INET6) { 951179157Srrs /* IPv6 sa address */ 952179157Srrs /* XXX scopeid */ 953179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 954179157Srrs 955179157Srrs param_type = ntohs(v6addr->ph.param_type); 956179157Srrs param_length = ntohs(v6addr->ph.param_length); 957179157Srrs 958179157Srrs if ((param_type == SCTP_IPV6_ADDRESS) && 959179157Srrs param_length == sizeof(struct sctp_ipv6addr_param) && 960179157Srrs (memcmp(&v6addr->addr, &sin6->sin6_addr, 961179157Srrs sizeof(struct in6_addr)) == 0)) { 962179157Srrs return (1); 963179157Srrs } 964180955Srrs } 965180955Srrs#endif 966179157Srrs if (sa->sa_family == AF_INET) { 967179157Srrs /* IPv4 sa address */ 968179157Srrs struct sockaddr_in *sin = (struct sockaddr_in *)sa; 969179157Srrs 970179157Srrs param_type = ntohs(v4addr->ph.param_type); 971179157Srrs param_length = ntohs(v4addr->ph.param_length); 972179157Srrs 973179157Srrs if ((param_type == SCTP_IPV4_ADDRESS) && 974179157Srrs param_length == sizeof(struct sctp_ipv4addr_param) && 975179157Srrs (memcmp(&v4addr->addr, &sin->sin_addr, 976179157Srrs sizeof(struct in_addr)) == 0)) { 977179157Srrs return (1); 978179157Srrs } 979179157Srrs } 980179157Srrs return (0); 981179157Srrs} 982179157Srrs 983179157Srrs/* 984163953Srrs * Cleanup for non-responded/OP ERR'd ASCONF 985163953Srrs */ 986163953Srrsvoid 987163953Srrssctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 988163953Srrs{ 989163953Srrs /* mark peer as ASCONF incapable */ 990163953Srrs stcb->asoc.peer_supports_asconf = 0; 991163953Srrs /* 992163953Srrs * clear out any existing asconfs going out 993163953Srrs */ 994169655Srrs sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 995169655Srrs SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 996179157Srrs stcb->asoc.asconf_seq_out_acked = stcb->asoc.asconf_seq_out; 997163953Srrs /* remove the old ASCONF on our outbound queue */ 998163953Srrs sctp_toss_old_asconf(stcb); 999163953Srrs} 1000163953Srrs 1001163953Srrs/* 1002171858Srrs * cleanup any cached source addresses that may be topologically 1003171858Srrs * incorrect after a new address has been added to this interface. 1004171858Srrs */ 1005171858Srrsstatic void 1006171858Srrssctp_asconf_nets_cleanup(struct sctp_tcb *stcb, struct sctp_ifn *ifn) 1007171858Srrs{ 1008171858Srrs struct sctp_nets *net; 1009171858Srrs 1010171858Srrs /* 1011171858Srrs * Ideally, we want to only clear cached routes and source addresses 1012171858Srrs * that are topologically incorrect. But since there is no easy way 1013171858Srrs * to know whether the newly added address on the ifn would cause a 1014171858Srrs * routing change (i.e. a new egress interface would be chosen) 1015171858Srrs * without doing a new routing lookup and source address selection, 1016171858Srrs * we will (for now) just flush any cached route using a different 1017171858Srrs * ifn (and cached source addrs) and let output re-choose them 1018171858Srrs * during the next send on that net. 1019171858Srrs */ 1020171858Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1021171858Srrs /* 1022171858Srrs * clear any cached route (and cached source address) if the 1023171858Srrs * route's interface is NOT the same as the address change. 1024171858Srrs * If it's the same interface, just clear the cached source 1025171858Srrs * address. 1026171858Srrs */ 1027171858Srrs if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro) && 1028171858Srrs SCTP_GET_IF_INDEX_FROM_ROUTE(&net->ro) != ifn->ifn_index) { 1029171858Srrs /* clear any cached route */ 1030171858Srrs RTFREE(net->ro.ro_rt); 1031171858Srrs net->ro.ro_rt = NULL; 1032171858Srrs } 1033171858Srrs /* clear any cached source address */ 1034171858Srrs if (net->src_addr_selected) { 1035171858Srrs sctp_free_ifa(net->ro._s_addr); 1036171858Srrs net->ro._s_addr = NULL; 1037171858Srrs net->src_addr_selected = 0; 1038171858Srrs } 1039171858Srrs } 1040171858Srrs} 1041171858Srrs 1042172091Srrsvoid 1043172091Srrssctp_move_chunks_from_deleted_prim(struct sctp_tcb *stcb, struct sctp_nets *dst) 1044172091Srrs{ 1045172091Srrs struct sctp_association *asoc; 1046172091Srrs struct sctp_stream_out *outs; 1047172091Srrs struct sctp_tmit_chunk *chk; 1048172091Srrs struct sctp_stream_queue_pending *sp; 1049172091Srrs 1050172091Srrs if (dst->dest_state & SCTP_ADDR_UNCONFIRMED) { 1051172091Srrs return; 1052172091Srrs } 1053172091Srrs if (stcb->asoc.deleted_primary == NULL) { 1054172091Srrs return; 1055172091Srrs } 1056172091Srrs asoc = &stcb->asoc; 1057172091Srrs 1058172091Srrs /* 1059172091Srrs * now through all the streams checking for chunks sent to our bad 1060172091Srrs * network. 1061172091Srrs */ 1062172091Srrs TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) { 1063172091Srrs /* now clean up any chunks here */ 1064172091Srrs TAILQ_FOREACH(sp, &outs->outqueue, next) { 1065172091Srrs if (sp->net == asoc->deleted_primary) { 1066172091Srrs sctp_free_remote_addr(sp->net); 1067172091Srrs sp->net = dst; 1068172091Srrs atomic_add_int(&dst->ref_count, 1); 1069172091Srrs } 1070172091Srrs } 1071172091Srrs } 1072172091Srrs /* Now check the pending queue */ 1073172091Srrs TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 1074172091Srrs if (chk->whoTo == asoc->deleted_primary) { 1075172091Srrs sctp_free_remote_addr(chk->whoTo); 1076172091Srrs chk->whoTo = dst; 1077172091Srrs atomic_add_int(&dst->ref_count, 1); 1078172091Srrs } 1079172091Srrs } 1080172091Srrs 1081172091Srrs} 1082172091Srrs 1083172091Srrs 1084172091Srrsvoid 1085172091Srrssctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet) 1086172091Srrs{ 1087172091Srrs int error; 1088172091Srrs 1089172118Srrs if (dstnet->dest_state & SCTP_ADDR_UNCONFIRMED) { 1090172118Srrs return; 1091172118Srrs } 1092172091Srrs if (stcb->asoc.deleted_primary == NULL) { 1093172091Srrs return; 1094172091Srrs } 1095172091Srrs if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { 1096172157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "assoc_immediate_retrans: Deleted primary is "); 1097172091Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1098172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "Current Primary is "); 1099172091Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.primary_destination->ro._l_addr.sa); 1100172091Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, 1101172091Srrs stcb->asoc.deleted_primary, 1102172091Srrs SCTP_FROM_SCTP_TIMER + SCTP_LOC_8); 1103172091Srrs stcb->asoc.num_send_timers_up--; 1104172091Srrs if (stcb->asoc.num_send_timers_up < 0) { 1105172091Srrs stcb->asoc.num_send_timers_up = 0; 1106172091Srrs } 1107172091Srrs SCTP_TCB_LOCK_ASSERT(stcb); 1108172091Srrs error = sctp_t3rxt_timer(stcb->sctp_ep, stcb, 1109172091Srrs stcb->asoc.deleted_primary); 1110172091Srrs if (error) { 1111172091Srrs SCTP_INP_DECR_REF(stcb->sctp_ep); 1112172091Srrs return; 1113172091Srrs } 1114172091Srrs SCTP_TCB_LOCK_ASSERT(stcb); 1115172091Srrs#ifdef SCTP_AUDITING_ENABLED 1116172091Srrs sctp_auditing(4, stcb->sctp_ep, stcb->asoc.deleted_primary); 1117172091Srrs#endif 1118172091Srrs sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1119172091Srrs if ((stcb->asoc.num_send_timers_up == 0) && 1120172091Srrs (stcb->asoc.sent_queue_cnt > 0)) { 1121172091Srrs struct sctp_tmit_chunk *chk; 1122172091Srrs 1123172091Srrs chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 1124172091Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 1125172091Srrs stcb, chk->whoTo); 1126172091Srrs } 1127172091Srrs } 1128172091Srrs return; 1129172091Srrs} 1130172091Srrs 1131171990Srrsstatic int 1132171990Srrs sctp_asconf_queue_mgmt(struct sctp_tcb *, struct sctp_ifa *, uint16_t); 1133171990Srrs 1134172091Srrsvoid 1135171990Srrssctp_net_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *net) 1136171990Srrs{ 1137171990Srrs struct sctp_tmit_chunk *chk; 1138171990Srrs 1139172157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "net_immediate_retrans: RTO is %d\n", net->RTO); 1140171990Srrs sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, net, 1141171990Srrs SCTP_FROM_SCTP_TIMER + SCTP_LOC_5); 1142171990Srrs stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 1143171990Srrs net->error_count = 0; 1144171990Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 1145171990Srrs if (chk->whoTo == net) { 1146172091Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 1147172091Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1148172091Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1149172396Srrs sctp_flight_size_decrease(chk); 1150172396Srrs sctp_total_flight_decrease(stcb, chk); 1151172396Srrs net->marked_retrans++; 1152172396Srrs stcb->asoc.marked_retrans++; 1153172091Srrs } 1154171990Srrs } 1155171990Srrs } 1156172396Srrs if (net->marked_retrans) { 1157172396Srrs sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1158172396Srrs } 1159171990Srrs} 1160171990Srrs 1161171990Srrsstatic void 1162171990Srrssctp_path_check_and_react(struct sctp_tcb *stcb, struct sctp_ifa *newifa) 1163171990Srrs{ 1164171990Srrs struct sctp_nets *net; 1165171990Srrs int addrnum, changed; 1166171990Srrs 1167171990Srrs /* 1168171990Srrs * If number of local valid addresses is 1, the valid address is 1169171990Srrs * probably newly added address. Several valid addresses in this 1170171990Srrs * association. A source address may not be changed. Additionally, 1171171990Srrs * they can be configured on a same interface as "alias" addresses. 1172171990Srrs * (by micchie) 1173171990Srrs */ 1174171990Srrs addrnum = sctp_local_addr_count(stcb); 1175171990Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "p_check_react(): %d local addresses\n", 1176171990Srrs addrnum); 1177171990Srrs if (addrnum == 1) { 1178171990Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1179171990Srrs /* clear any cached route and source address */ 1180171990Srrs if (net->ro.ro_rt) { 1181171990Srrs RTFREE(net->ro.ro_rt); 1182171990Srrs net->ro.ro_rt = NULL; 1183171990Srrs } 1184171990Srrs if (net->src_addr_selected) { 1185171990Srrs sctp_free_ifa(net->ro._s_addr); 1186171990Srrs net->ro._s_addr = NULL; 1187171990Srrs net->src_addr_selected = 0; 1188171990Srrs } 1189171990Srrs /* Retransmit unacknowledged DATA chunks immediately */ 1190171990Srrs if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1191171990Srrs SCTP_MOBILITY_FASTHANDOFF)) { 1192171990Srrs sctp_net_immediate_retrans(stcb, net); 1193171990Srrs } 1194171990Srrs /* also, SET PRIMARY is maybe already sent */ 1195171990Srrs } 1196171990Srrs return; 1197171990Srrs } 1198171990Srrs /* Multiple local addresses exsist in the association. */ 1199171990Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200171990Srrs /* clear any cached route and source address */ 1201171990Srrs if (net->ro.ro_rt) { 1202171990Srrs RTFREE(net->ro.ro_rt); 1203171990Srrs net->ro.ro_rt = NULL; 1204171990Srrs } 1205171990Srrs if (net->src_addr_selected) { 1206171990Srrs sctp_free_ifa(net->ro._s_addr); 1207171990Srrs net->ro._s_addr = NULL; 1208171990Srrs net->src_addr_selected = 0; 1209171990Srrs } 1210171990Srrs /* 1211171990Srrs * Check if the nexthop is corresponding to the new address. 1212171990Srrs * If the new address is corresponding to the current 1213171990Srrs * nexthop, the path will be changed. If the new address is 1214171990Srrs * NOT corresponding to the current nexthop, the path will 1215171990Srrs * not be changed. 1216171990Srrs */ 1217171990Srrs SCTP_RTALLOC((sctp_route_t *) & net->ro, 1218171990Srrs stcb->sctp_ep->def_vrf_id); 1219171990Srrs if (net->ro.ro_rt == NULL) 1220171990Srrs continue; 1221171990Srrs 1222172137Srrs changed = 0; 1223171990Srrs if (net->ro._l_addr.sa.sa_family == AF_INET) { 1224171990Srrs if (sctp_v4src_match_nexthop(newifa, (sctp_route_t *) & net->ro)) 1225171990Srrs changed = 1; 1226171990Srrs } 1227178251Srrs#ifdef INET6 1228171990Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1229171990Srrs if (sctp_v6src_match_nexthop( 1230171990Srrs &newifa->address.sin6, (sctp_route_t *) & net->ro)) 1231171990Srrs changed = 1; 1232171990Srrs } 1233178251Srrs#endif 1234171990Srrs /* 1235171990Srrs * if the newly added address does not relate routing 1236171990Srrs * information, we skip. 1237171990Srrs */ 1238171990Srrs if (changed == 0) 1239171990Srrs continue; 1240171990Srrs /* Retransmit unacknowledged DATA chunks immediately */ 1241171990Srrs if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1242171990Srrs SCTP_MOBILITY_FASTHANDOFF)) { 1243171990Srrs sctp_net_immediate_retrans(stcb, net); 1244171990Srrs } 1245171990Srrs /* Send SET PRIMARY for this new address */ 1246171990Srrs if (net == stcb->asoc.primary_destination) { 1247171990Srrs (void)sctp_asconf_queue_mgmt(stcb, newifa, 1248171990Srrs SCTP_SET_PRIM_ADDR); 1249171990Srrs } 1250171990Srrs } 1251171990Srrs} 1252171990Srrs 1253171858Srrs/* 1254163953Srrs * process an ADD/DELETE IP ack from peer. 1255171572Srrs * addr: corresponding sctp_ifa to the address being added/deleted. 1256163953Srrs * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 1257163953Srrs * flag: 1=success, 0=failure. 1258163953Srrs */ 1259163953Srrsstatic void 1260167598Srrssctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, 1261163953Srrs uint16_t type, uint32_t flag) 1262163953Srrs{ 1263163953Srrs /* 1264163953Srrs * do the necessary asoc list work- if we get a failure indication, 1265171858Srrs * leave the address on the assoc's restricted list. If we get a 1266171858Srrs * success indication, remove the address from the restricted list. 1267163953Srrs */ 1268163953Srrs /* 1269163953Srrs * Note: this will only occur for ADD_IP_ADDRESS, since 1270163953Srrs * DEL_IP_ADDRESS is never actually added to the list... 1271163953Srrs */ 1272163953Srrs if (flag) { 1273171572Srrs /* success case, so remove from the restricted list */ 1274171572Srrs sctp_del_local_addr_restricted(stcb, addr); 1275171858Srrs 1276172190Srrs if (sctp_is_mobility_feature_on(stcb->sctp_ep, 1277172396Srrs SCTP_MOBILITY_BASE) || 1278172396Srrs sctp_is_mobility_feature_on(stcb->sctp_ep, 1279172396Srrs SCTP_MOBILITY_FASTHANDOFF)) { 1280171990Srrs sctp_path_check_and_react(stcb, addr); 1281171990Srrs return; 1282171990Srrs } 1283172190Srrs /* clear any cached/topologically incorrect source addresses */ 1284171858Srrs sctp_asconf_nets_cleanup(stcb, addr->ifn_p); 1285163953Srrs } 1286163953Srrs /* else, leave it on the list */ 1287163953Srrs} 1288163953Srrs 1289163953Srrs/* 1290171572Srrs * add an asconf add/delete/set primary IP address parameter to the queue. 1291163953Srrs * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1292171572Srrs * returns 0 if queued, -1 if not queued/removed. 1293171572Srrs * NOTE: if adding, but a delete for the same address is already scheduled 1294171572Srrs * (and not yet sent out), simply remove it from queue. Same for deleting 1295171572Srrs * an address already scheduled for add. If a duplicate operation is found, 1296171572Srrs * ignore the new one. 1297163953Srrs */ 1298171572Srrsstatic int 1299171572Srrssctp_asconf_queue_mgmt(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1300171477Srrs uint16_t type) 1301163953Srrs{ 1302163953Srrs struct sctp_asconf_addr *aa, *aa_next; 1303163953Srrs struct sockaddr *sa; 1304163953Srrs 1305163953Srrs /* make sure the request isn't already in the queue */ 1306163953Srrs for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1307163953Srrs aa = aa_next) { 1308163953Srrs aa_next = TAILQ_NEXT(aa, next); 1309163953Srrs /* address match? */ 1310167598Srrs if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 1311163953Srrs continue; 1312179157Srrs /* 1313179157Srrs * is the request already in queue but not sent? pass the 1314179157Srrs * request already sent in order to resolve the following 1315179157Srrs * case: 1. arrival of ADD, then sent 2. arrival of DEL. we 1316179157Srrs * can't remove the ADD request already sent 3. arrival of 1317179157Srrs * ADD 1318179157Srrs */ 1319179157Srrs if (aa->ap.aph.ph.param_type == type && aa->sent == 0) { 1320163953Srrs return (-1); 1321163953Srrs } 1322163953Srrs /* is the negative request already in queue, and not sent */ 1323171572Srrs if ((aa->sent == 0) && (type == SCTP_ADD_IP_ADDRESS) && 1324171572Srrs (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS)) { 1325171572Srrs /* add requested, delete already queued */ 1326163953Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1327171572Srrs /* remove the ifa from the restricted list */ 1328171572Srrs sctp_del_local_addr_restricted(stcb, ifa); 1329171572Srrs /* free the asconf param */ 1330170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1331171572Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: add removes queued entry\n"); 1332163953Srrs return (-1); 1333163953Srrs } 1334171572Srrs if ((aa->sent == 0) && (type == SCTP_DEL_IP_ADDRESS) && 1335171572Srrs (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS)) { 1336171572Srrs /* delete requested, add already queued */ 1337171572Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1338171572Srrs /* remove the aa->ifa from the restricted list */ 1339171572Srrs sctp_del_local_addr_restricted(stcb, aa->ifa); 1340171572Srrs /* free the asconf param */ 1341171572Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1342171572Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_mgmt: delete removes queued entry\n"); 1343171572Srrs return (-1); 1344171572Srrs } 1345163953Srrs } /* for each aa */ 1346163953Srrs 1347163953Srrs /* adding new request to the queue */ 1348171572Srrs SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1349171572Srrs SCTP_M_ASC_ADDR); 1350163953Srrs if (aa == NULL) { 1351163953Srrs /* didn't get memory */ 1352171572Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_queue_mgmt: failed to get memory!\n"); 1353163953Srrs return (-1); 1354163953Srrs } 1355185694Srrs aa->special_del = 0; 1356163953Srrs /* fill in asconf address parameter fields */ 1357163953Srrs /* top level elements are "networked" during send */ 1358163953Srrs aa->ap.aph.ph.param_type = type; 1359163953Srrs aa->ifa = ifa; 1360168299Srrs atomic_add_int(&ifa->refcount, 1); 1361163953Srrs /* correlation_id filled in during send routine later... */ 1362167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 1363163953Srrs /* IPv6 address */ 1364163953Srrs struct sockaddr_in6 *sin6; 1365163953Srrs 1366167598Srrs sin6 = (struct sockaddr_in6 *)&ifa->address.sa; 1367163953Srrs sa = (struct sockaddr *)sin6; 1368163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1369163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1370171572Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1371163953Srrs sizeof(struct sctp_ipv6addr_param); 1372163953Srrs memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1373163953Srrs sizeof(struct in6_addr)); 1374167598Srrs } else if (ifa->address.sa.sa_family == AF_INET) { 1375163953Srrs /* IPv4 address */ 1376171572Srrs struct sockaddr_in *sin; 1377163953Srrs 1378171572Srrs sin = (struct sockaddr_in *)&ifa->address.sa; 1379163953Srrs sa = (struct sockaddr *)sin; 1380163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1381163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1382171572Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + 1383163953Srrs sizeof(struct sctp_ipv4addr_param); 1384163953Srrs memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1385163953Srrs sizeof(struct in_addr)); 1386163953Srrs } else { 1387163953Srrs /* invalid family! */ 1388170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1389172190Srrs sctp_free_ifa(ifa); 1390163953Srrs return (-1); 1391163953Srrs } 1392163953Srrs aa->sent = 0; /* clear sent flag */ 1393163953Srrs 1394179157Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1395163953Srrs#ifdef SCTP_DEBUG 1396179783Srrs if (SCTP_BASE_SYSCTL(sctp_debug_on) && SCTP_DEBUG_ASCONF2) { 1397179157Srrs if (type == SCTP_ADD_IP_ADDRESS) { 1398179157Srrs SCTP_PRINTF("asconf_queue_mgmt: inserted asconf ADD_IP_ADDRESS: "); 1399179157Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1400179157Srrs } else if (type == SCTP_DEL_IP_ADDRESS) { 1401179157Srrs SCTP_PRINTF("asconf_queue_mgmt: appended asconf DEL_IP_ADDRESS: "); 1402179157Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1403179157Srrs } else { 1404179157Srrs SCTP_PRINTF("asconf_queue_mgmt: appended asconf SET_PRIM_ADDR: "); 1405179157Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1406163953Srrs } 1407179157Srrs } 1408169420Srrs#endif 1409163953Srrs 1410163953Srrs return (0); 1411163953Srrs} 1412163953Srrs 1413171572Srrs 1414163953Srrs/* 1415171572Srrs * add an asconf operation for the given ifa and type. 1416171572Srrs * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1417171572Srrs * returns 0 if completed, -1 if not completed, 1 if immediate send is 1418171572Srrs * advisable. 1419171572Srrs */ 1420171572Srrsstatic int 1421171572Srrssctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, 1422171572Srrs uint16_t type) 1423171572Srrs{ 1424171572Srrs uint32_t status; 1425171572Srrs int pending_delete_queued = 0; 1426171572Srrs 1427171572Srrs /* see if peer supports ASCONF */ 1428171572Srrs if (stcb->asoc.peer_supports_asconf == 0) { 1429171572Srrs return (-1); 1430171572Srrs } 1431171572Srrs /* 1432171572Srrs * if this is deleting the last address from the assoc, mark it as 1433171572Srrs * pending. 1434171572Srrs */ 1435171572Srrs if ((type == SCTP_DEL_IP_ADDRESS) && !stcb->asoc.asconf_del_pending && 1436171572Srrs (sctp_local_addr_count(stcb) < 2)) { 1437171572Srrs /* set the pending delete info only */ 1438171572Srrs stcb->asoc.asconf_del_pending = 1; 1439171572Srrs stcb->asoc.asconf_addr_del_pending = ifa; 1440171572Srrs atomic_add_int(&ifa->refcount, 1); 1441171572Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, 1442171572Srrs "asconf_queue_add: mark delete last address pending\n"); 1443171572Srrs return (-1); 1444171572Srrs } 1445179157Srrs /* queue an asconf parameter */ 1446179157Srrs status = sctp_asconf_queue_mgmt(stcb, ifa, type); 1447179157Srrs 1448171572Srrs /* 1449171572Srrs * if this is an add, and there is a delete also pending (i.e. the 1450171572Srrs * last local address is being changed), queue the pending delete 1451171572Srrs * too. 1452171572Srrs */ 1453179157Srrs if ((type == SCTP_ADD_IP_ADDRESS) && stcb->asoc.asconf_del_pending && (status == 0)) { 1454171572Srrs /* queue in the pending delete */ 1455171572Srrs if (sctp_asconf_queue_mgmt(stcb, 1456171572Srrs stcb->asoc.asconf_addr_del_pending, 1457171572Srrs SCTP_DEL_IP_ADDRESS) == 0) { 1458171572Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, "asconf_queue_add: queing pending delete\n"); 1459171572Srrs pending_delete_queued = 1; 1460171572Srrs /* clear out the pending delete info */ 1461171572Srrs stcb->asoc.asconf_del_pending = 0; 1462171572Srrs sctp_free_ifa(stcb->asoc.asconf_addr_del_pending); 1463171572Srrs stcb->asoc.asconf_addr_del_pending = NULL; 1464171572Srrs } 1465171572Srrs } 1466179157Srrs if (pending_delete_queued) { 1467171572Srrs struct sctp_nets *net; 1468171572Srrs 1469171572Srrs /* 1470171572Srrs * since we know that the only/last address is now being 1471171572Srrs * changed in this case, reset the cwnd/rto on all nets to 1472171572Srrs * start as a new address and path. Also clear the error 1473171572Srrs * counts to give the assoc the best chance to complete the 1474171572Srrs * address change. 1475171572Srrs */ 1476171572Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1477171572Srrs stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, 1478171572Srrs net); 1479171572Srrs net->RTO = 0; 1480171572Srrs net->error_count = 0; 1481171572Srrs } 1482171572Srrs stcb->asoc.overall_error_count = 0; 1483179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 1484171943Srrs sctp_misc_ints(SCTP_THRESHOLD_CLEAR, 1485171943Srrs stcb->asoc.overall_error_count, 1486171943Srrs 0, 1487171943Srrs SCTP_FROM_SCTP_ASCONF, 1488171943Srrs __LINE__); 1489171943Srrs } 1490171572Srrs /* queue in an advisory set primary too */ 1491171572Srrs (void)sctp_asconf_queue_mgmt(stcb, ifa, SCTP_SET_PRIM_ADDR); 1492171572Srrs /* let caller know we should send this out immediately */ 1493171572Srrs status = 1; 1494171572Srrs } 1495171572Srrs return (status); 1496171572Srrs} 1497171572Srrs 1498172190Srrs/*- 1499172190Srrs * add an asconf delete IP address parameter to the queue by sockaddr and 1500172190Srrs * possibly with no sctp_ifa available. This is only called by the routine 1501172190Srrs * that checks the addresses in an INIT-ACK against the current address list. 1502163953Srrs * returns 0 if completed, non-zero if not completed. 1503172190Srrs * NOTE: if an add is already scheduled (and not yet sent out), simply 1504172190Srrs * remove it from queue. If a duplicate operation is found, ignore the 1505172190Srrs * new one. 1506163953Srrs */ 1507171572Srrsstatic int 1508172190Srrssctp_asconf_queue_sa_delete(struct sctp_tcb *stcb, struct sockaddr *sa) 1509163953Srrs{ 1510168299Srrs struct sctp_ifa *ifa; 1511163953Srrs struct sctp_asconf_addr *aa, *aa_next; 1512167598Srrs uint32_t vrf_id; 1513163953Srrs 1514169420Srrs if (stcb == NULL) { 1515169420Srrs return (-1); 1516169420Srrs } 1517163953Srrs /* see if peer supports ASCONF */ 1518163953Srrs if (stcb->asoc.peer_supports_asconf == 0) { 1519163953Srrs return (-1); 1520163953Srrs } 1521163953Srrs /* make sure the request isn't already in the queue */ 1522163953Srrs for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1523163953Srrs aa = aa_next) { 1524163953Srrs aa_next = TAILQ_NEXT(aa, next); 1525163953Srrs /* address match? */ 1526163953Srrs if (sctp_asconf_addr_match(aa, sa) == 0) 1527163953Srrs continue; 1528163953Srrs /* is the request already in queue (sent or not) */ 1529172190Srrs if (aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1530163953Srrs return (-1); 1531163953Srrs } 1532163953Srrs /* is the negative request already in queue, and not sent */ 1533163953Srrs if (aa->sent == 1) 1534163953Srrs continue; 1535172190Srrs if (aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1536172190Srrs /* add already queued, so remove existing entry */ 1537163953Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1538171572Srrs sctp_del_local_addr_restricted(stcb, aa->ifa); 1539163953Srrs /* free the entry */ 1540170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1541163953Srrs return (-1); 1542163953Srrs } 1543163953Srrs } /* for each aa */ 1544172190Srrs 1545172190Srrs /* find any existing ifa-- NOTE ifa CAN be allowed to be NULL */ 1546168299Srrs if (stcb) { 1547168299Srrs vrf_id = stcb->asoc.vrf_id; 1548168299Srrs } else { 1549168299Srrs vrf_id = SCTP_DEFAULT_VRFID; 1550168299Srrs } 1551172190Srrs ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 1552163953Srrs 1553163953Srrs /* adding new request to the queue */ 1554171572Srrs SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 1555171572Srrs SCTP_M_ASC_ADDR); 1556163953Srrs if (aa == NULL) { 1557163953Srrs /* didn't get memory */ 1558169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1559172190Srrs "sctp_asconf_queue_sa_delete: failed to get memory!\n"); 1560163953Srrs return (-1); 1561163953Srrs } 1562185694Srrs aa->special_del = 0; 1563163953Srrs /* fill in asconf address parameter fields */ 1564163953Srrs /* top level elements are "networked" during send */ 1565172190Srrs aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 1566168299Srrs aa->ifa = ifa; 1567172190Srrs if (ifa) 1568172190Srrs atomic_add_int(&ifa->refcount, 1); 1569163953Srrs /* correlation_id filled in during send routine later... */ 1570163953Srrs if (sa->sa_family == AF_INET6) { 1571163953Srrs /* IPv6 address */ 1572163953Srrs struct sockaddr_in6 *sin6; 1573163953Srrs 1574163953Srrs sin6 = (struct sockaddr_in6 *)sa; 1575163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1576163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1577163953Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1578163953Srrs memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1579163953Srrs sizeof(struct in6_addr)); 1580163953Srrs } else if (sa->sa_family == AF_INET) { 1581163953Srrs /* IPv4 address */ 1582163953Srrs struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1583163953Srrs 1584163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1585163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1586163953Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1587163953Srrs memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1588163953Srrs sizeof(struct in_addr)); 1589163953Srrs } else { 1590163953Srrs /* invalid family! */ 1591170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1592172190Srrs if (ifa) 1593172190Srrs sctp_free_ifa(ifa); 1594163953Srrs return (-1); 1595163953Srrs } 1596163953Srrs aa->sent = 0; /* clear sent flag */ 1597163953Srrs 1598172190Srrs /* delete goes to the back of the queue */ 1599172190Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1600163953Srrs 1601172218Srrs /* sa_ignore MEMLEAK {memory is put on the tailq} */ 1602163953Srrs return (0); 1603163953Srrs} 1604163953Srrs 1605163953Srrs/* 1606163953Srrs * find a specific asconf param on our "sent" queue 1607163953Srrs */ 1608163953Srrsstatic struct sctp_asconf_addr * 1609163953Srrssctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1610163953Srrs{ 1611163953Srrs struct sctp_asconf_addr *aa; 1612163953Srrs 1613163953Srrs TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1614163953Srrs if (aa->ap.aph.correlation_id == correlation_id && 1615163953Srrs aa->sent == 1) { 1616163953Srrs /* found it */ 1617163953Srrs return (aa); 1618163953Srrs } 1619163953Srrs } 1620163953Srrs /* didn't find it */ 1621163953Srrs return (NULL); 1622163953Srrs} 1623163953Srrs 1624163953Srrs/* 1625163953Srrs * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1626163953Srrs * notifications based on the error response 1627163953Srrs */ 1628163953Srrsstatic void 1629163953Srrssctp_asconf_process_error(struct sctp_tcb *stcb, 1630163953Srrs struct sctp_asconf_paramhdr *aph) 1631163953Srrs{ 1632163953Srrs struct sctp_error_cause *eh; 1633163953Srrs struct sctp_paramhdr *ph; 1634163953Srrs uint16_t param_type; 1635163953Srrs uint16_t error_code; 1636163953Srrs 1637163953Srrs eh = (struct sctp_error_cause *)(aph + 1); 1638163953Srrs ph = (struct sctp_paramhdr *)(eh + 1); 1639163953Srrs /* validate lengths */ 1640163953Srrs if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1641163953Srrs htons(aph->ph.param_length)) { 1642163953Srrs /* invalid error cause length */ 1643169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1644169420Srrs "asconf_process_error: cause element too long\n"); 1645163953Srrs return; 1646163953Srrs } 1647163953Srrs if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1648163953Srrs htons(eh->length)) { 1649163953Srrs /* invalid included TLV length */ 1650169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1651169420Srrs "asconf_process_error: included TLV too long\n"); 1652163953Srrs return; 1653163953Srrs } 1654163953Srrs /* which error code ? */ 1655163953Srrs error_code = ntohs(eh->code); 1656163953Srrs param_type = ntohs(aph->ph.param_type); 1657163953Srrs /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1658163953Srrs switch (error_code) { 1659163953Srrs case SCTP_CAUSE_RESOURCE_SHORTAGE: 1660163953Srrs /* we allow ourselves to "try again" for this error */ 1661163953Srrs break; 1662163953Srrs default: 1663163953Srrs /* peer can't handle it... */ 1664163953Srrs switch (param_type) { 1665163953Srrs case SCTP_ADD_IP_ADDRESS: 1666163953Srrs case SCTP_DEL_IP_ADDRESS: 1667163953Srrs stcb->asoc.peer_supports_asconf = 0; 1668163953Srrs break; 1669163953Srrs case SCTP_SET_PRIM_ADDR: 1670163953Srrs stcb->asoc.peer_supports_asconf = 0; 1671163953Srrs break; 1672163953Srrs default: 1673163953Srrs break; 1674163953Srrs } 1675163953Srrs } 1676163953Srrs} 1677163953Srrs 1678163953Srrs/* 1679171477Srrs * process an asconf queue param. 1680171477Srrs * aparam: parameter to process, will be removed from the queue. 1681171477Srrs * flag: 1=success case, 0=failure case 1682163953Srrs */ 1683163953Srrsstatic void 1684163953Srrssctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1685163953Srrs struct sctp_asconf_addr *aparam, uint32_t flag) 1686163953Srrs{ 1687163953Srrs uint16_t param_type; 1688163953Srrs 1689163953Srrs /* process this param */ 1690163953Srrs param_type = aparam->ap.aph.ph.param_type; 1691163953Srrs switch (param_type) { 1692163953Srrs case SCTP_ADD_IP_ADDRESS: 1693169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1694169420Srrs "process_param_ack: added IP address\n"); 1695163953Srrs sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag); 1696163953Srrs break; 1697163953Srrs case SCTP_DEL_IP_ADDRESS: 1698169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1699169420Srrs "process_param_ack: deleted IP address\n"); 1700163953Srrs /* nothing really to do... lists already updated */ 1701163953Srrs break; 1702163953Srrs case SCTP_SET_PRIM_ADDR: 1703179157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1704179157Srrs "process_param_ack: set primary IP address\n"); 1705163953Srrs /* nothing to do... peer may start using this addr */ 1706163953Srrs if (flag == 0) 1707163953Srrs stcb->asoc.peer_supports_asconf = 0; 1708163953Srrs break; 1709163953Srrs default: 1710163953Srrs /* should NEVER happen */ 1711163953Srrs break; 1712163953Srrs } 1713163953Srrs 1714163953Srrs /* remove the param and free it */ 1715163953Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1716172190Srrs if (aparam->ifa) 1717172190Srrs sctp_free_ifa(aparam->ifa); 1718170091Srrs SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1719163953Srrs} 1720163953Srrs 1721163953Srrs/* 1722163953Srrs * cleanup from a bad asconf ack parameter 1723163953Srrs */ 1724163953Srrsstatic void 1725163953Srrssctp_asconf_ack_clear(struct sctp_tcb *stcb) 1726163953Srrs{ 1727163953Srrs /* assume peer doesn't really know how to do asconfs */ 1728163953Srrs stcb->asoc.peer_supports_asconf = 0; 1729163953Srrs /* XXX we could free the pending queue here */ 1730163953Srrs} 1731163953Srrs 1732163953Srrsvoid 1733163953Srrssctp_handle_asconf_ack(struct mbuf *m, int offset, 1734163953Srrs struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1735172190Srrs struct sctp_nets *net, int *abort_no_unlock) 1736163953Srrs{ 1737163953Srrs struct sctp_association *asoc; 1738163953Srrs uint32_t serial_num; 1739163953Srrs uint16_t ack_length; 1740163953Srrs struct sctp_asconf_paramhdr *aph; 1741163953Srrs struct sctp_asconf_addr *aa, *aa_next; 1742163953Srrs uint32_t last_error_id = 0; /* last error correlation id */ 1743163953Srrs uint32_t id; 1744163953Srrs struct sctp_asconf_addr *ap; 1745163953Srrs 1746163953Srrs /* asconf param buffer */ 1747166675Srrs uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1748163953Srrs 1749163953Srrs /* verify minimum length */ 1750163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1751169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1752169420Srrs "handle_asconf_ack: chunk too small = %xh\n", 1753169420Srrs ntohs(cp->ch.chunk_length)); 1754163953Srrs return; 1755163953Srrs } 1756163953Srrs asoc = &stcb->asoc; 1757163953Srrs serial_num = ntohl(cp->serial_number); 1758163953Srrs 1759163953Srrs /* 1760163953Srrs * NOTE: we may want to handle this differently- currently, we will 1761163953Srrs * abort when we get an ack for the expected serial number + 1 (eg. 1762163953Srrs * we didn't send it), process an ack normally if it is the expected 1763163953Srrs * serial number, and re-send the previous ack for *ALL* other 1764163953Srrs * serial numbers 1765163953Srrs */ 1766163953Srrs 1767163953Srrs /* 1768163953Srrs * if the serial number is the next expected, but I didn't send it, 1769163953Srrs * abort the asoc, since someone probably just hijacked us... 1770163953Srrs */ 1771163953Srrs if (serial_num == (asoc->asconf_seq_out + 1)) { 1772169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1773163953Srrs sctp_abort_an_association(stcb->sctp_ep, stcb, 1774172090Srrs SCTP_CAUSE_ILLEGAL_ASCONF_ACK, NULL, SCTP_SO_NOT_LOCKED); 1775172190Srrs *abort_no_unlock = 1; 1776163953Srrs return; 1777163953Srrs } 1778179157Srrs if (serial_num != asoc->asconf_seq_out_acked + 1) { 1779163953Srrs /* got a duplicate/unexpected ASCONF-ACK */ 1780169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1781179157Srrs serial_num, asoc->asconf_seq_out_acked + 1); 1782163953Srrs return; 1783163953Srrs } 1784179157Srrs if (serial_num == asoc->asconf_seq_out - 1) { 1785179157Srrs /* stop our timer */ 1786179157Srrs sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1787179157Srrs SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1788163953Srrs } 1789163953Srrs /* process the ASCONF-ACK contents */ 1790163953Srrs ack_length = ntohs(cp->ch.chunk_length) - 1791163953Srrs sizeof(struct sctp_asconf_ack_chunk); 1792163953Srrs offset += sizeof(struct sctp_asconf_ack_chunk); 1793163953Srrs /* process through all parameters */ 1794163953Srrs while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1795163953Srrs unsigned int param_length, param_type; 1796163953Srrs 1797163953Srrs /* get pointer to next asconf parameter */ 1798163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1799163953Srrs sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1800163953Srrs if (aph == NULL) { 1801163953Srrs /* can't get an asconf paramhdr */ 1802163953Srrs sctp_asconf_ack_clear(stcb); 1803163953Srrs return; 1804163953Srrs } 1805163953Srrs param_type = ntohs(aph->ph.param_type); 1806163953Srrs param_length = ntohs(aph->ph.param_length); 1807163953Srrs if (param_length > ack_length) { 1808163953Srrs sctp_asconf_ack_clear(stcb); 1809163953Srrs return; 1810163953Srrs } 1811163953Srrs if (param_length < sizeof(struct sctp_paramhdr)) { 1812163953Srrs sctp_asconf_ack_clear(stcb); 1813163953Srrs return; 1814163953Srrs } 1815163953Srrs /* get the complete parameter... */ 1816163953Srrs if (param_length > sizeof(aparam_buf)) { 1817169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1818169420Srrs "param length (%u) larger than buffer size!\n", param_length); 1819163953Srrs sctp_asconf_ack_clear(stcb); 1820163953Srrs return; 1821163953Srrs } 1822163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1823163953Srrs if (aph == NULL) { 1824163953Srrs sctp_asconf_ack_clear(stcb); 1825163953Srrs return; 1826163953Srrs } 1827163953Srrs /* correlation_id is transparent to peer, no ntohl needed */ 1828163953Srrs id = aph->correlation_id; 1829163953Srrs 1830163953Srrs switch (param_type) { 1831163953Srrs case SCTP_ERROR_CAUSE_IND: 1832163953Srrs last_error_id = id; 1833163953Srrs /* find the corresponding asconf param in our queue */ 1834163953Srrs ap = sctp_asconf_find_param(stcb, id); 1835163953Srrs if (ap == NULL) { 1836163953Srrs /* hmm... can't find this in our queue! */ 1837163953Srrs break; 1838163953Srrs } 1839163953Srrs /* process the parameter, failed flag */ 1840163953Srrs sctp_asconf_process_param_ack(stcb, ap, 0); 1841163953Srrs /* process the error response */ 1842163953Srrs sctp_asconf_process_error(stcb, aph); 1843163953Srrs break; 1844163953Srrs case SCTP_SUCCESS_REPORT: 1845163953Srrs /* find the corresponding asconf param in our queue */ 1846163953Srrs ap = sctp_asconf_find_param(stcb, id); 1847163953Srrs if (ap == NULL) { 1848163953Srrs /* hmm... can't find this in our queue! */ 1849163953Srrs break; 1850163953Srrs } 1851163953Srrs /* process the parameter, success flag */ 1852163953Srrs sctp_asconf_process_param_ack(stcb, ap, 1); 1853163953Srrs break; 1854163953Srrs default: 1855163953Srrs break; 1856163953Srrs } /* switch */ 1857163953Srrs 1858163953Srrs /* update remaining ASCONF-ACK message length to process */ 1859163953Srrs ack_length -= SCTP_SIZE32(param_length); 1860163953Srrs if (ack_length <= 0) { 1861163953Srrs /* no more data in the mbuf chain */ 1862163953Srrs break; 1863163953Srrs } 1864163953Srrs offset += SCTP_SIZE32(param_length); 1865163953Srrs } /* while */ 1866163953Srrs 1867163953Srrs /* 1868163953Srrs * if there are any "sent" params still on the queue, these are 1869163953Srrs * implicitly "success", or "failed" (if we got an error back) ... 1870163953Srrs * so process these appropriately 1871163953Srrs * 1872163953Srrs * we assume that the correlation_id's are monotonically increasing 1873163953Srrs * beginning from 1 and that we don't have *that* many outstanding 1874163953Srrs * at any given time 1875163953Srrs */ 1876163953Srrs if (last_error_id == 0) 1877163953Srrs last_error_id--;/* set to "max" value */ 1878163953Srrs for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1879163953Srrs aa = aa_next) { 1880163953Srrs aa_next = TAILQ_NEXT(aa, next); 1881163953Srrs if (aa->sent == 1) { 1882163953Srrs /* 1883163953Srrs * implicitly successful or failed if correlation_id 1884163953Srrs * < last_error_id, then success else, failure 1885163953Srrs */ 1886163953Srrs if (aa->ap.aph.correlation_id < last_error_id) 1887171477Srrs sctp_asconf_process_param_ack(stcb, aa, 1); 1888163953Srrs else 1889171477Srrs sctp_asconf_process_param_ack(stcb, aa, 0); 1890163953Srrs } else { 1891163953Srrs /* 1892163953Srrs * since we always process in order (FIFO queue) if 1893163953Srrs * we reach one that hasn't been sent, the rest 1894163953Srrs * should not have been sent either. so, we're 1895163953Srrs * done... 1896163953Srrs */ 1897163953Srrs break; 1898163953Srrs } 1899163953Srrs } 1900163953Srrs 1901163953Srrs /* update the next sequence number to use */ 1902179157Srrs asoc->asconf_seq_out_acked++; 1903163953Srrs /* remove the old ASCONF on our outbound queue */ 1904163953Srrs sctp_toss_old_asconf(stcb); 1905163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1906171572Srrs#ifdef SCTP_TIMER_BASED_ASCONF 1907163953Srrs /* we have more params, so restart our timer */ 1908163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1909163953Srrs stcb, net); 1910171572Srrs#else 1911171572Srrs /* we have more params, so send out more */ 1912172190Srrs sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1913171572Srrs#endif 1914163953Srrs } 1915163953Srrs} 1916163953Srrs 1917178251Srrs#ifdef INET6 1918163953Srrsstatic uint32_t 1919163953Srrssctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1920163953Srrs{ 1921163953Srrs struct sockaddr_in6 *sin6, *net6; 1922163953Srrs struct sctp_nets *net; 1923163953Srrs 1924163953Srrs if (sa->sa_family != AF_INET6) { 1925163953Srrs /* wrong family */ 1926163953Srrs return (0); 1927163953Srrs } 1928163953Srrs sin6 = (struct sockaddr_in6 *)sa; 1929163953Srrs if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1930163953Srrs /* not link local address */ 1931163953Srrs return (0); 1932163953Srrs } 1933163953Srrs /* hunt through our destination nets list for this scope_id */ 1934163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1935163953Srrs if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1936163953Srrs AF_INET6) 1937163953Srrs continue; 1938163953Srrs net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1939163953Srrs if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1940163953Srrs continue; 1941163953Srrs if (sctp_is_same_scope(sin6, net6)) { 1942163953Srrs /* found one */ 1943163953Srrs return (1); 1944163953Srrs } 1945163953Srrs } 1946163953Srrs /* didn't find one */ 1947163953Srrs return (0); 1948163953Srrs} 1949163953Srrs 1950178251Srrs#endif 1951178251Srrs 1952163953Srrs/* 1953163953Srrs * address management functions 1954163953Srrs */ 1955163953Srrsstatic void 1956163953Srrssctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1957172190Srrs struct sctp_ifa *ifa, uint16_t type, int addr_locked) 1958163953Srrs{ 1959163953Srrs int status; 1960163953Srrs 1961163953Srrs 1962163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 && 1963163953Srrs sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1964163953Srrs /* subset bound, no ASCONF allowed case, so ignore */ 1965163953Srrs return; 1966163953Srrs } 1967163953Srrs /* 1968163953Srrs * note: we know this is not the subset bound, no ASCONF case eg. 1969163953Srrs * this is boundall or subset bound w/ASCONF allowed 1970163953Srrs */ 1971163953Srrs 1972163953Srrs /* first, make sure it's a good address family */ 1973167598Srrs if (ifa->address.sa.sa_family != AF_INET6 && 1974167598Srrs ifa->address.sa.sa_family != AF_INET) { 1975163953Srrs return; 1976163953Srrs } 1977163953Srrs /* make sure we're "allowed" to add this type of addr */ 1978167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 1979163953Srrs /* invalid if we're not a v6 endpoint */ 1980163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1981163953Srrs return; 1982163953Srrs /* is the v6 addr really valid ? */ 1983167598Srrs if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1984163953Srrs return; 1985163953Srrs } 1986163953Srrs } 1987163953Srrs /* put this address on the "pending/do not use yet" list */ 1988171572Srrs sctp_add_local_addr_restricted(stcb, ifa); 1989163953Srrs /* 1990163953Srrs * check address scope if address is out of scope, don't queue 1991163953Srrs * anything... note: this would leave the address on both inp and 1992163953Srrs * asoc lists 1993163953Srrs */ 1994178251Srrs switch (ifa->address.sa.sa_family) { 1995178251Srrs#ifdef INET6 1996178251Srrs case AF_INET6: 1997178251Srrs { 1998178251Srrs struct sockaddr_in6 *sin6; 1999163953Srrs 2000178251Srrs sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2001178251Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2002178251Srrs /* we skip unspecifed addresses */ 2003163953Srrs return; 2004163953Srrs } 2005178251Srrs if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2006178251Srrs if (stcb->asoc.local_scope == 0) { 2007178251Srrs return; 2008178251Srrs } 2009178251Srrs /* is it the right link local scope? */ 2010178251Srrs if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2011178251Srrs return; 2012178251Srrs } 2013178251Srrs } 2014178251Srrs if (stcb->asoc.site_scope == 0 && 2015178251Srrs IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 2016163953Srrs return; 2017163953Srrs } 2018178251Srrs break; 2019163953Srrs } 2020178251Srrs#endif 2021178251Srrs case AF_INET: 2022178251Srrs { 2023178251Srrs struct sockaddr_in *sin; 2024178251Srrs struct in6pcb *inp6; 2025163953Srrs 2026178251Srrs inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2027178251Srrs /* invalid if we are a v6 only endpoint */ 2028178251Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2029178251Srrs SCTP_IPV6_V6ONLY(inp6)) 2030178251Srrs return; 2031163953Srrs 2032178251Srrs sin = (struct sockaddr_in *)&ifa->address.sa; 2033178251Srrs if (sin->sin_addr.s_addr == 0) { 2034178251Srrs /* we skip unspecifed addresses */ 2035178251Srrs return; 2036178251Srrs } 2037178251Srrs if (stcb->asoc.ipv4_local_scope == 0 && 2038178251Srrs IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2039178251Srrs return; 2040178251Srrs } 2041178251Srrs break; 2042163953Srrs } 2043178251Srrs default: 2044163953Srrs /* else, not AF_INET or AF_INET6, so skip */ 2045163953Srrs return; 2046163953Srrs } 2047163953Srrs 2048163953Srrs /* queue an asconf for this address add/delete */ 2049163953Srrs if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 2050163953Srrs /* does the peer do asconf? */ 2051163953Srrs if (stcb->asoc.peer_supports_asconf) { 2052163953Srrs /* queue an asconf for this addr */ 2053163953Srrs status = sctp_asconf_queue_add(stcb, ifa, type); 2054171572Srrs 2055163953Srrs /* 2056171572Srrs * if queued ok, and in the open state, send out the 2057171572Srrs * ASCONF. If in the non-open state, these will be 2058171572Srrs * sent when the state goes open. 2059163953Srrs */ 2060163953Srrs if (status == 0 && 2061163953Srrs SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2062171572Srrs#ifdef SCTP_TIMER_BASED_ASCONF 2063163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 2064163953Srrs stcb, stcb->asoc.primary_destination); 2065171572Srrs#else 2066172190Srrs sctp_send_asconf(stcb, stcb->asoc.primary_destination, 2067172190Srrs addr_locked); 2068171572Srrs#endif 2069163953Srrs } 2070163953Srrs } 2071163953Srrs } 2072163953Srrs} 2073163953Srrs 2074167598Srrs 2075167598Srrsint 2076171572Srrssctp_asconf_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val) 2077163953Srrs{ 2078167598Srrs struct sctp_asconf_iterator *asc; 2079167598Srrs struct sctp_ifa *ifa; 2080167598Srrs struct sctp_laddr *l; 2081167598Srrs int type; 2082167598Srrs int cnt_invalid = 0; 2083163953Srrs 2084167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 2085167598Srrs LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2086167598Srrs ifa = l->ifa; 2087167598Srrs type = l->action; 2088167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 2089167598Srrs /* invalid if we're not a v6 endpoint */ 2090167598Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2091167598Srrs cnt_invalid++; 2092167598Srrs if (asc->cnt == cnt_invalid) 2093167598Srrs return (1); 2094167598Srrs else 2095167598Srrs continue; 2096167598Srrs } 2097167598Srrs } else if (ifa->address.sa.sa_family == AF_INET) { 2098167598Srrs /* invalid if we are a v6 only endpoint */ 2099167598Srrs struct in6pcb *inp6; 2100163953Srrs 2101167598Srrs inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2102167598Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2103167598Srrs SCTP_IPV6_V6ONLY(inp6)) { 2104167598Srrs cnt_invalid++; 2105167598Srrs if (asc->cnt == cnt_invalid) 2106167598Srrs return (1); 2107167598Srrs else 2108167598Srrs continue; 2109163953Srrs } 2110163953Srrs } else { 2111167598Srrs /* invalid address family */ 2112167598Srrs cnt_invalid++; 2113167598Srrs if (asc->cnt == cnt_invalid) 2114167598Srrs return (1); 2115167598Srrs else 2116167598Srrs continue; 2117163953Srrs } 2118163953Srrs } 2119167598Srrs return (0); 2120163953Srrs} 2121163953Srrs 2122171572Srrsstatic int 2123171572Srrssctp_asconf_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val) 2124163953Srrs{ 2125167598Srrs struct sctp_ifa *ifa; 2126167598Srrs struct sctp_asconf_iterator *asc; 2127167598Srrs struct sctp_laddr *laddr, *nladdr, *l; 2128163953Srrs 2129167598Srrs /* Only for specific case not bound all */ 2130167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 2131167598Srrs LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2132167598Srrs ifa = l->ifa; 2133167598Srrs if (l->action == SCTP_ADD_IP_ADDRESS) { 2134169655Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, 2135169655Srrs sctp_nxt_addr) { 2136167598Srrs if (laddr->ifa == ifa) { 2137167598Srrs laddr->action = 0; 2138167598Srrs break; 2139167598Srrs } 2140167598Srrs } 2141167598Srrs } else if (l->action == SCTP_DEL_IP_ADDRESS) { 2142167598Srrs laddr = LIST_FIRST(&inp->sctp_addr_list); 2143167598Srrs while (laddr) { 2144167598Srrs nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 2145167598Srrs /* remove only after all guys are done */ 2146167598Srrs if (laddr->ifa == ifa) { 2147167598Srrs sctp_del_local_addr_ep(inp, ifa); 2148167598Srrs } 2149167598Srrs laddr = nladdr; 2150167598Srrs } 2151167598Srrs } 2152163953Srrs } 2153167598Srrs return (0); 2154163953Srrs} 2155163953Srrs 2156167598Srrsvoid 2157171572Srrssctp_asconf_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2158171572Srrs void *ptr, uint32_t val) 2159163953Srrs{ 2160167598Srrs struct sctp_asconf_iterator *asc; 2161167598Srrs struct sctp_ifa *ifa; 2162167598Srrs struct sctp_laddr *l; 2163167598Srrs int cnt_invalid = 0; 2164167598Srrs int type, status; 2165171572Srrs int num_queued = 0; 2166163953Srrs 2167167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 2168167598Srrs LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 2169167598Srrs ifa = l->ifa; 2170167598Srrs type = l->action; 2171170751Srrs 2172170751Srrs /* address's vrf_id must be the vrf_id of the assoc */ 2173170751Srrs if (ifa->vrf_id != stcb->asoc.vrf_id) { 2174170751Srrs continue; 2175170751Srrs } 2176167598Srrs /* Same checks again for assoc */ 2177178251Srrs switch (ifa->address.sa.sa_family) { 2178178251Srrs#ifdef INET6 2179178251Srrs case AF_INET6: 2180178251Srrs { 2181178251Srrs /* invalid if we're not a v6 endpoint */ 2182178251Srrs struct sockaddr_in6 *sin6; 2183163953Srrs 2184178251Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 2185178251Srrs cnt_invalid++; 2186178251Srrs if (asc->cnt == cnt_invalid) 2187178251Srrs return; 2188178251Srrs else 2189178251Srrs continue; 2190167598Srrs } 2191178251Srrs sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 2192178251Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2193178251Srrs /* we skip unspecifed addresses */ 2194167598Srrs continue; 2195167598Srrs } 2196178251Srrs if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2197178251Srrs if (stcb->asoc.local_scope == 0) { 2198178251Srrs continue; 2199178251Srrs } 2200178251Srrs /* is it the right link local scope? */ 2201178251Srrs if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 2202178251Srrs continue; 2203178251Srrs } 2204178251Srrs } 2205178251Srrs break; 2206167598Srrs } 2207178251Srrs#endif 2208178251Srrs case AF_INET: 2209178251Srrs { 2210178251Srrs /* invalid if we are a v6 only endpoint */ 2211178251Srrs struct in6pcb *inp6; 2212178251Srrs struct sockaddr_in *sin; 2213163953Srrs 2214178251Srrs inp6 = (struct in6pcb *)&inp->ip_inp.inp; 2215178251Srrs /* invalid if we are a v6 only endpoint */ 2216178251Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2217178251Srrs SCTP_IPV6_V6ONLY(inp6)) 2218178251Srrs continue; 2219167598Srrs 2220178251Srrs sin = (struct sockaddr_in *)&ifa->address.sa; 2221178251Srrs if (sin->sin_addr.s_addr == 0) { 2222178251Srrs /* we skip unspecifed addresses */ 2223167598Srrs continue; 2224178251Srrs } 2225178251Srrs if (stcb->asoc.ipv4_local_scope == 0 && 2226178251Srrs IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2227178251Srrs continue;; 2228178251Srrs } 2229178251Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2230178251Srrs SCTP_IPV6_V6ONLY(inp6)) { 2231178251Srrs cnt_invalid++; 2232178251Srrs if (asc->cnt == cnt_invalid) 2233178251Srrs return; 2234178251Srrs else 2235178251Srrs continue; 2236178251Srrs } 2237178251Srrs break; 2238167598Srrs } 2239178251Srrs default: 2240167598Srrs /* invalid address family */ 2241167598Srrs cnt_invalid++; 2242167598Srrs if (asc->cnt == cnt_invalid) 2243163953Srrs return; 2244167598Srrs else 2245167598Srrs continue; 2246178251Srrs break; 2247163953Srrs } 2248163953Srrs 2249167598Srrs if (type == SCTP_ADD_IP_ADDRESS) { 2250171572Srrs /* prevent this address from being used as a source */ 2251171572Srrs sctp_add_local_addr_restricted(stcb, ifa); 2252167598Srrs } else if (type == SCTP_DEL_IP_ADDRESS) { 2253163953Srrs struct sctp_nets *net; 2254163953Srrs 2255163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2256169352Srrs sctp_rtentry_t *rt; 2257163953Srrs 2258163953Srrs /* delete this address if cached */ 2259172091Srrs if (net->ro._s_addr == ifa) { 2260167598Srrs sctp_free_ifa(net->ro._s_addr); 2261167598Srrs net->ro._s_addr = NULL; 2262167598Srrs net->src_addr_selected = 0; 2263167598Srrs rt = net->ro.ro_rt; 2264167598Srrs if (rt) { 2265167598Srrs RTFREE(rt); 2266167598Srrs net->ro.ro_rt = NULL; 2267167598Srrs } 2268167598Srrs /* 2269167598Srrs * Now we deleted our src address, 2270167598Srrs * should we not also now reset the 2271167598Srrs * cwnd/rto to start as if its a new 2272167598Srrs * address? 2273167598Srrs */ 2274171440Srrs stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 2275170428Srrs net->RTO = 0; 2276167598Srrs 2277163953Srrs } 2278167598Srrs } 2279167598Srrs } else if (type == SCTP_SET_PRIM_ADDR) { 2280167598Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2281171572Srrs /* must validate the ifa is in the ep */ 2282167598Srrs if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 2283167598Srrs continue; 2284163953Srrs } 2285167598Srrs } else { 2286167598Srrs /* Need to check scopes for this guy */ 2287167598Srrs if (sctp_is_address_in_scope(ifa, 2288167598Srrs stcb->asoc.ipv4_addr_legal, 2289167598Srrs stcb->asoc.ipv6_addr_legal, 2290167598Srrs stcb->asoc.loopback_scope, 2291167598Srrs stcb->asoc.ipv4_local_scope, 2292167598Srrs stcb->asoc.local_scope, 2293167598Srrs stcb->asoc.site_scope, 0) == 0) { 2294167598Srrs continue; 2295167598Srrs } 2296163953Srrs } 2297163953Srrs } 2298167598Srrs /* queue an asconf for this address add/delete */ 2299171572Srrs if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF) && 2300171572Srrs stcb->asoc.peer_supports_asconf) { 2301171572Srrs /* queue an asconf for this addr */ 2302171572Srrs status = sctp_asconf_queue_add(stcb, ifa, type); 2303171572Srrs /* 2304171572Srrs * if queued ok, and in the open state, update the 2305171572Srrs * count of queued params. If in the non-open 2306171572Srrs * state, these get sent when the assoc goes open. 2307171572Srrs */ 2308171572Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2309171572Srrs if (status >= 0) { 2310171572Srrs num_queued++; 2311167598Srrs } 2312167598Srrs } 2313167598Srrs } 2314163953Srrs } 2315171572Srrs /* 2316171572Srrs * If we have queued params in the open state, send out an ASCONF. 2317171572Srrs */ 2318171572Srrs if (num_queued > 0) { 2319172190Srrs sctp_send_asconf(stcb, stcb->asoc.primary_destination, 2320172190Srrs SCTP_ADDR_NOT_LOCKED); 2321171572Srrs } 2322163953Srrs} 2323163953Srrs 2324171572Srrsvoid 2325171572Srrssctp_asconf_iterator_end(void *ptr, uint32_t val) 2326167598Srrs{ 2327167598Srrs struct sctp_asconf_iterator *asc; 2328167598Srrs struct sctp_ifa *ifa; 2329167598Srrs struct sctp_laddr *l, *l_next; 2330167598Srrs 2331167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 2332167598Srrs l = LIST_FIRST(&asc->list_of_work); 2333167598Srrs while (l != NULL) { 2334167598Srrs l_next = LIST_NEXT(l, sctp_nxt_addr); 2335167598Srrs ifa = l->ifa; 2336167598Srrs if (l->action == SCTP_ADD_IP_ADDRESS) { 2337167598Srrs /* Clear the defer use flag */ 2338167598Srrs ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 2339167598Srrs } 2340167598Srrs sctp_free_ifa(ifa); 2341179783Srrs SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), l); 2342167598Srrs SCTP_DECR_LADDR_COUNT(); 2343167598Srrs l = l_next; 2344167598Srrs } 2345170091Srrs SCTP_FREE(asc, SCTP_M_ASC_IT); 2346167598Srrs} 2347167598Srrs 2348163953Srrs/* 2349171572Srrs * sa is the sockaddr to ask the peer to set primary to. 2350171572Srrs * returns: 0 = completed, -1 = error 2351163953Srrs */ 2352171943Srrsint32_t 2353163953Srrssctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 2354163953Srrs{ 2355172190Srrs uint32_t vrf_id; 2356172190Srrs struct sctp_ifa *ifa; 2357163953Srrs 2358172190Srrs /* find the ifa for the desired set primary */ 2359172218Srrs vrf_id = stcb->asoc.vrf_id; 2360172190Srrs ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 2361172190Srrs if (ifa == NULL) { 2362172190Srrs /* Invalid address */ 2363172190Srrs return (-1); 2364172190Srrs } 2365163953Srrs /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2366172190Srrs if (!sctp_asconf_queue_add(stcb, ifa, SCTP_SET_PRIM_ADDR)) { 2367163953Srrs /* set primary queuing succeeded */ 2368171572Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2369171572Srrs "set_primary_ip_address_sa: queued on tcb=%p, ", 2370171572Srrs stcb); 2371171572Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2372163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2373171572Srrs#ifdef SCTP_TIMER_BASED_ASCONF 2374163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2375163953Srrs stcb->sctp_ep, stcb, 2376163953Srrs stcb->asoc.primary_destination); 2377171572Srrs#else 2378172190Srrs sctp_send_asconf(stcb, stcb->asoc.primary_destination, 2379172190Srrs SCTP_ADDR_NOT_LOCKED); 2380171572Srrs#endif 2381163953Srrs } 2382163953Srrs } else { 2383169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 2384169420Srrs stcb); 2385169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 2386163953Srrs return (-1); 2387163953Srrs } 2388163953Srrs return (0); 2389163953Srrs} 2390163953Srrs 2391163953Srrsvoid 2392167598Srrssctp_set_primary_ip_address(struct sctp_ifa *ifa) 2393163953Srrs{ 2394163953Srrs struct sctp_inpcb *inp; 2395163953Srrs 2396163953Srrs /* go through all our PCB's */ 2397179783Srrs LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 2398163953Srrs struct sctp_tcb *stcb; 2399163953Srrs 2400163953Srrs /* process for all associations for this endpoint */ 2401163953Srrs LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 2402163953Srrs /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 2403163953Srrs if (!sctp_asconf_queue_add(stcb, ifa, 2404163953Srrs SCTP_SET_PRIM_ADDR)) { 2405163953Srrs /* set primary queuing succeeded */ 2406172090Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 2407171572Srrs stcb); 2408171572Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 2409171572Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 2410171572Srrs#ifdef SCTP_TIMER_BASED_ASCONF 2411163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2412163953Srrs stcb->sctp_ep, stcb, 2413163953Srrs stcb->asoc.primary_destination); 2414171572Srrs#else 2415172190Srrs sctp_send_asconf(stcb, stcb->asoc.primary_destination, 2416172190Srrs SCTP_ADDR_NOT_LOCKED); 2417171572Srrs#endif 2418163953Srrs } 2419163953Srrs } 2420163953Srrs } /* for each stcb */ 2421163953Srrs } /* for each inp */ 2422163953Srrs} 2423163953Srrs 2424179157Srrsint 2425179157Srrssctp_is_addr_pending(struct sctp_tcb *stcb, struct sctp_ifa *sctp_ifa) 2426179157Srrs{ 2427179157Srrs struct sctp_tmit_chunk *chk, *nchk; 2428179157Srrs unsigned int offset, asconf_limit; 2429179157Srrs struct sctp_asconf_chunk *acp; 2430179157Srrs struct sctp_asconf_paramhdr *aph; 2431179157Srrs uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 2432179157Srrs struct sctp_ipv6addr_param *p_addr; 2433179157Srrs int add_cnt, del_cnt; 2434179157Srrs uint16_t last_param_type; 2435179157Srrs 2436179157Srrs add_cnt = del_cnt = 0; 2437179157Srrs last_param_type = 0; 2438179157Srrs for (chk = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); chk != NULL; 2439179157Srrs chk = nchk) { 2440179157Srrs /* get next chk */ 2441179157Srrs nchk = TAILQ_NEXT(chk, sctp_next); 2442179157Srrs 2443179157Srrs if (chk->data == NULL) { 2444179157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: No mbuf data?\n"); 2445179157Srrs continue; 2446179157Srrs } 2447179157Srrs offset = 0; 2448179157Srrs acp = mtod(chk->data, struct sctp_asconf_chunk *); 2449179157Srrs offset += sizeof(struct sctp_asconf_chunk); 2450179157Srrs asconf_limit = ntohs(acp->ch.chunk_length); 2451179157Srrs p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_paramhdr), aparam_buf); 2452179157Srrs if (p_addr == NULL) { 2453179157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get lookup addr!\n"); 2454179157Srrs continue; 2455179157Srrs } 2456179157Srrs offset += ntohs(p_addr->ph.param_length); 2457179157Srrs 2458179157Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2459179157Srrs if (aph == NULL) { 2460179157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: Empty ASCONF will be sent?\n"); 2461179157Srrs continue; 2462179157Srrs } 2463179157Srrs while (aph != NULL) { 2464179157Srrs unsigned int param_length, param_type; 2465179157Srrs 2466179157Srrs param_type = ntohs(aph->ph.param_type); 2467179157Srrs param_length = ntohs(aph->ph.param_length); 2468179157Srrs if (offset + param_length > asconf_limit) { 2469179157Srrs /* parameter goes beyond end of chunk! */ 2470179157Srrs break; 2471179157Srrs } 2472179157Srrs if (param_length > sizeof(aparam_buf)) { 2473179157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length (%u) larger than buffer size!\n", param_length); 2474179157Srrs break; 2475179157Srrs } 2476179157Srrs if (param_length <= sizeof(struct sctp_paramhdr)) { 2477179157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: param length(%u) too short\n", param_length); 2478179157Srrs break; 2479179157Srrs } 2480179157Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, param_length, aparam_buf); 2481179157Srrs if (aph == NULL) { 2482179157Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "is_addr_pending: couldn't get entire param\n"); 2483179157Srrs break; 2484179157Srrs } 2485179157Srrs p_addr = (struct sctp_ipv6addr_param *)(aph + 1); 2486179157Srrs if (sctp_addr_match(p_addr, &sctp_ifa->address.sa) != 0) { 2487179157Srrs switch (param_type) { 2488179157Srrs case SCTP_ADD_IP_ADDRESS: 2489179157Srrs add_cnt++; 2490179157Srrs break; 2491179157Srrs case SCTP_DEL_IP_ADDRESS: 2492179157Srrs del_cnt++; 2493179157Srrs break; 2494179157Srrs default: 2495179157Srrs break; 2496179157Srrs } 2497179157Srrs last_param_type = param_type; 2498179157Srrs } 2499179157Srrs offset += SCTP_SIZE32(param_length); 2500179157Srrs if (offset >= asconf_limit) { 2501179157Srrs /* no more data in the mbuf chain */ 2502179157Srrs break; 2503179157Srrs } 2504179157Srrs /* get pointer to next asconf param */ 2505179157Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(chk->data, offset, sizeof(struct sctp_asconf_paramhdr), aparam_buf); 2506179157Srrs } 2507179157Srrs } 2508179157Srrs 2509179157Srrs /* 2510179157Srrs * we want to find the sequences which consist of ADD -> DEL -> ADD 2511179157Srrs * or DEL -> ADD 2512179157Srrs */ 2513179157Srrs if (add_cnt > del_cnt || 2514179157Srrs (add_cnt == del_cnt && last_param_type == SCTP_ADD_IP_ADDRESS)) { 2515179157Srrs return 1; 2516179157Srrs } 2517179157Srrs return 0; 2518179157Srrs} 2519179157Srrs 2520163953Srrsstatic struct sockaddr * 2521172190Srrssctp_find_valid_localaddr(struct sctp_tcb *stcb, int addr_locked) 2522163953Srrs{ 2523167598Srrs struct sctp_vrf *vrf = NULL; 2524167598Srrs struct sctp_ifn *sctp_ifn; 2525167598Srrs struct sctp_ifa *sctp_ifa; 2526163953Srrs 2527172190Srrs if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2528172218Srrs SCTP_IPI_ADDR_RLOCK(); 2529167598Srrs vrf = sctp_find_vrf(stcb->asoc.vrf_id); 2530169420Srrs if (vrf == NULL) { 2531172190Srrs if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2532172218Srrs SCTP_IPI_ADDR_RUNLOCK(); 2533169420Srrs return (NULL); 2534169420Srrs } 2535167598Srrs LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2536167598Srrs if (stcb->asoc.loopback_scope == 0 && 2537167598Srrs SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2538163953Srrs /* Skip if loopback_scope not set */ 2539163953Srrs continue; 2540163953Srrs } 2541167598Srrs LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2542167598Srrs if (sctp_ifa->address.sa.sa_family == AF_INET && 2543163953Srrs stcb->asoc.ipv4_addr_legal) { 2544163953Srrs struct sockaddr_in *sin; 2545163953Srrs 2546167598Srrs sin = (struct sockaddr_in *)&sctp_ifa->address.sa; 2547163953Srrs if (sin->sin_addr.s_addr == 0) { 2548163953Srrs /* skip unspecifed addresses */ 2549163953Srrs continue; 2550163953Srrs } 2551163953Srrs if (stcb->asoc.ipv4_local_scope == 0 && 2552163953Srrs IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 2553163953Srrs continue; 2554163953Srrs 2555179157Srrs if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2556179157Srrs (!sctp_is_addr_pending(stcb, sctp_ifa))) 2557163953Srrs continue; 2558163953Srrs /* found a valid local v4 address to use */ 2559172190Srrs if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2560172218Srrs SCTP_IPI_ADDR_RUNLOCK(); 2561167598Srrs return (&sctp_ifa->address.sa); 2562167598Srrs } else if (sctp_ifa->address.sa.sa_family == AF_INET6 && 2563163953Srrs stcb->asoc.ipv6_addr_legal) { 2564163953Srrs struct sockaddr_in6 *sin6; 2565163953Srrs 2566167598Srrs if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2567163953Srrs continue; 2568167598Srrs } 2569167598Srrs sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa; 2570163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2571163953Srrs /* we skip unspecifed addresses */ 2572163953Srrs continue; 2573163953Srrs } 2574163953Srrs if (stcb->asoc.local_scope == 0 && 2575163953Srrs IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 2576163953Srrs continue; 2577163953Srrs if (stcb->asoc.site_scope == 0 && 2578163953Srrs IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 2579163953Srrs continue; 2580163953Srrs 2581179157Srrs if (sctp_is_addr_restricted(stcb, sctp_ifa) && 2582179157Srrs (!sctp_is_addr_pending(stcb, sctp_ifa))) 2583179157Srrs continue; 2584163953Srrs /* found a valid local v6 address to use */ 2585172190Srrs if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2586172218Srrs SCTP_IPI_ADDR_RUNLOCK(); 2587167598Srrs return (&sctp_ifa->address.sa); 2588163953Srrs } 2589163953Srrs } 2590163953Srrs } 2591163953Srrs /* no valid addresses found */ 2592172190Srrs if (addr_locked == SCTP_ADDR_NOT_LOCKED) 2593172218Srrs SCTP_IPI_ADDR_RUNLOCK(); 2594163953Srrs return (NULL); 2595163953Srrs} 2596163953Srrs 2597163953Srrsstatic struct sockaddr * 2598163953Srrssctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 2599163953Srrs{ 2600163953Srrs struct sctp_laddr *laddr; 2601163953Srrs 2602163953Srrs LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2603163953Srrs if (laddr->ifa == NULL) { 2604163953Srrs continue; 2605163953Srrs } 2606163953Srrs /* is the address restricted ? */ 2607179157Srrs if (sctp_is_addr_restricted(stcb, laddr->ifa) && 2608179157Srrs (!sctp_is_addr_pending(stcb, laddr->ifa))) 2609163953Srrs continue; 2610163953Srrs 2611163953Srrs /* found a valid local address to use */ 2612167598Srrs return (&laddr->ifa->address.sa); 2613163953Srrs } 2614163953Srrs /* no valid addresses found */ 2615163953Srrs return (NULL); 2616163953Srrs} 2617163953Srrs 2618163953Srrs/* 2619171477Srrs * builds an ASCONF chunk from queued ASCONF params. 2620171477Srrs * returns NULL on error (no mbuf, no ASCONF params queued, etc). 2621163953Srrs */ 2622163953Srrsstruct mbuf * 2623172190Srrssctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked) 2624163953Srrs{ 2625163953Srrs struct mbuf *m_asconf, *m_asconf_chk; 2626163953Srrs struct sctp_asconf_addr *aa; 2627163953Srrs struct sctp_asconf_chunk *acp; 2628163953Srrs struct sctp_asconf_paramhdr *aph; 2629163953Srrs struct sctp_asconf_addr_param *aap; 2630163953Srrs uint32_t p_length; 2631163953Srrs uint32_t correlation_id = 1; /* 0 is reserved... */ 2632163953Srrs caddr_t ptr, lookup_ptr; 2633163953Srrs uint8_t lookup_used = 0; 2634163953Srrs 2635163953Srrs /* are there any asconf params to send? */ 2636179157Srrs TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2637179157Srrs if (aa->sent == 0) 2638179157Srrs break; 2639163953Srrs } 2640179157Srrs if (aa == NULL) 2641171572Srrs return (NULL); 2642179157Srrs 2643163953Srrs /* 2644163953Srrs * get a chunk header mbuf and a cluster for the asconf params since 2645163953Srrs * it's simpler to fill in the asconf chunk header lookup address on 2646163953Srrs * the fly 2647163953Srrs */ 2648165647Srrs m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA); 2649163953Srrs if (m_asconf_chk == NULL) { 2650163953Srrs /* no mbuf's */ 2651169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2652169420Srrs "compose_asconf: couldn't get chunk mbuf!\n"); 2653163953Srrs return (NULL); 2654163953Srrs } 2655165647Srrs m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 2656163953Srrs if (m_asconf == NULL) { 2657163953Srrs /* no mbuf's */ 2658169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2659169420Srrs "compose_asconf: couldn't get mbuf!\n"); 2660163953Srrs sctp_m_freem(m_asconf_chk); 2661163953Srrs return (NULL); 2662163953Srrs } 2663165647Srrs SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2664165647Srrs SCTP_BUF_LEN(m_asconf) = 0; 2665163953Srrs acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2666163953Srrs bzero(acp, sizeof(struct sctp_asconf_chunk)); 2667163953Srrs /* save pointers to lookup address and asconf params */ 2668163953Srrs lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2669163953Srrs ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2670163953Srrs 2671163953Srrs /* fill in chunk header info */ 2672163953Srrs acp->ch.chunk_type = SCTP_ASCONF; 2673163953Srrs acp->ch.chunk_flags = 0; 2674163953Srrs acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2675179157Srrs stcb->asoc.asconf_seq_out++; 2676163953Srrs 2677163953Srrs /* add parameters... up to smallest MTU allowed */ 2678163953Srrs TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2679179157Srrs if (aa->sent) 2680179157Srrs continue; 2681163953Srrs /* get the parameter length */ 2682163953Srrs p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2683163953Srrs /* will it fit in current chunk? */ 2684165647Srrs if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) { 2685163953Srrs /* won't fit, so we're done with this chunk */ 2686163953Srrs break; 2687163953Srrs } 2688163953Srrs /* assign (and store) a correlation id */ 2689163953Srrs aa->ap.aph.correlation_id = correlation_id++; 2690163953Srrs 2691163953Srrs /* 2692163953Srrs * fill in address if we're doing a delete this is a simple 2693163953Srrs * way for us to fill in the correlation address, which 2694163953Srrs * should only be used by the peer if we're deleting our 2695163953Srrs * source address and adding a new address (e.g. renumbering 2696163953Srrs * case) 2697163953Srrs */ 2698163953Srrs if (lookup_used == 0 && 2699185694Srrs (aa->special_del == 0) && 2700163953Srrs aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2701163953Srrs struct sctp_ipv6addr_param *lookup; 2702163953Srrs uint16_t p_size, addr_size; 2703163953Srrs 2704163953Srrs lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2705163953Srrs lookup->ph.param_type = 2706163953Srrs htons(aa->ap.addrp.ph.param_type); 2707163953Srrs if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2708163953Srrs /* copy IPv6 address */ 2709163953Srrs p_size = sizeof(struct sctp_ipv6addr_param); 2710163953Srrs addr_size = sizeof(struct in6_addr); 2711163953Srrs } else { 2712163953Srrs /* copy IPv4 address */ 2713163953Srrs p_size = sizeof(struct sctp_ipv4addr_param); 2714163953Srrs addr_size = sizeof(struct in_addr); 2715163953Srrs } 2716163953Srrs lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2717163953Srrs memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2718165647Srrs SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2719163953Srrs lookup_used = 1; 2720163953Srrs } 2721163953Srrs /* copy into current space */ 2722163953Srrs memcpy(ptr, &aa->ap, p_length); 2723163953Srrs 2724163953Srrs /* network elements and update lengths */ 2725163953Srrs aph = (struct sctp_asconf_paramhdr *)ptr; 2726163953Srrs aap = (struct sctp_asconf_addr_param *)ptr; 2727163953Srrs /* correlation_id is transparent to peer, no htonl needed */ 2728163953Srrs aph->ph.param_type = htons(aph->ph.param_type); 2729163953Srrs aph->ph.param_length = htons(aph->ph.param_length); 2730163953Srrs aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2731163953Srrs aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2732163953Srrs 2733165647Srrs SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2734163953Srrs ptr += SCTP_SIZE32(p_length); 2735163953Srrs 2736163953Srrs /* 2737163953Srrs * these params are removed off the pending list upon 2738163953Srrs * getting an ASCONF-ACK back from the peer, just set flag 2739163953Srrs */ 2740163953Srrs aa->sent = 1; 2741163953Srrs } 2742163953Srrs /* check to see if the lookup addr has been populated yet */ 2743163953Srrs if (lookup_used == 0) { 2744163953Srrs /* NOTE: if the address param is optional, can skip this... */ 2745163953Srrs /* add any valid (existing) address... */ 2746163953Srrs struct sctp_ipv6addr_param *lookup; 2747163953Srrs uint16_t p_size, addr_size; 2748163953Srrs struct sockaddr *found_addr; 2749163953Srrs caddr_t addr_ptr; 2750163953Srrs 2751163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2752172190Srrs found_addr = sctp_find_valid_localaddr(stcb, 2753172190Srrs addr_locked); 2754163953Srrs else 2755163953Srrs found_addr = sctp_find_valid_localaddr_ep(stcb); 2756163953Srrs 2757163953Srrs lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2758163953Srrs if (found_addr != NULL) { 2759163953Srrs if (found_addr->sa_family == AF_INET6) { 2760163953Srrs /* copy IPv6 address */ 2761163953Srrs lookup->ph.param_type = 2762163953Srrs htons(SCTP_IPV6_ADDRESS); 2763163953Srrs p_size = sizeof(struct sctp_ipv6addr_param); 2764163953Srrs addr_size = sizeof(struct in6_addr); 2765163953Srrs addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2766163953Srrs found_addr)->sin6_addr; 2767163953Srrs } else { 2768163953Srrs /* copy IPv4 address */ 2769163953Srrs lookup->ph.param_type = 2770163953Srrs htons(SCTP_IPV4_ADDRESS); 2771163953Srrs p_size = sizeof(struct sctp_ipv4addr_param); 2772163953Srrs addr_size = sizeof(struct in_addr); 2773163953Srrs addr_ptr = (caddr_t)&((struct sockaddr_in *) 2774163953Srrs found_addr)->sin_addr; 2775163953Srrs } 2776163953Srrs lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2777163953Srrs memcpy(lookup->addr, addr_ptr, addr_size); 2778165647Srrs SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2779163953Srrs lookup_used = 1; 2780163953Srrs } else { 2781163953Srrs /* uh oh... don't have any address?? */ 2782169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2783169420Srrs "compose_asconf: no lookup addr!\n"); 2784163953Srrs /* for now, we send a IPv4 address of 0.0.0.0 */ 2785163953Srrs lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2786163953Srrs lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2787163953Srrs bzero(lookup->addr, sizeof(struct in_addr)); 2788165647Srrs SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2789163953Srrs lookup_used = 1; 2790163953Srrs } 2791163953Srrs } 2792163953Srrs /* chain it all together */ 2793165647Srrs SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2794169655Srrs *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2795169655Srrs acp->ch.chunk_length = ntohs(*retlen); 2796163953Srrs 2797163953Srrs return (m_asconf_chk); 2798163953Srrs} 2799163953Srrs 2800163953Srrs/* 2801163953Srrs * section to handle address changes before an association is up eg. changes 2802163953Srrs * during INIT/INIT-ACK/COOKIE-ECHO handshake 2803163953Srrs */ 2804163953Srrs 2805163953Srrs/* 2806163953Srrs * processes the (local) addresses in the INIT-ACK chunk 2807163953Srrs */ 2808163953Srrsstatic void 2809163953Srrssctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2810163953Srrs unsigned int offset, unsigned int length) 2811163953Srrs{ 2812163953Srrs struct sctp_paramhdr tmp_param, *ph; 2813163953Srrs uint16_t plen, ptype; 2814167598Srrs struct sctp_ifa *sctp_ifa; 2815163953Srrs struct sctp_ipv6addr_param addr_store; 2816163953Srrs struct sockaddr_in6 sin6; 2817163953Srrs struct sockaddr_in sin; 2818163953Srrs struct sockaddr *sa; 2819167598Srrs uint32_t vrf_id; 2820163953Srrs 2821169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2822169420Srrs if (stcb == NULL) /* Un-needed check for SA */ 2823169420Srrs return; 2824163953Srrs 2825163953Srrs /* convert to upper bound */ 2826163953Srrs length += offset; 2827163953Srrs 2828163953Srrs if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2829163953Srrs return; 2830163953Srrs } 2831163953Srrs /* init the addresses */ 2832163953Srrs bzero(&sin6, sizeof(sin6)); 2833163953Srrs sin6.sin6_family = AF_INET6; 2834163953Srrs sin6.sin6_len = sizeof(sin6); 2835163953Srrs sin6.sin6_port = stcb->rport; 2836163953Srrs 2837163953Srrs bzero(&sin, sizeof(sin)); 2838163953Srrs sin.sin_len = sizeof(sin); 2839163953Srrs sin.sin_family = AF_INET; 2840163953Srrs sin.sin_port = stcb->rport; 2841163953Srrs 2842163953Srrs /* go through the addresses in the init-ack */ 2843163953Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2844163953Srrs sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2845163953Srrs while (ph != NULL) { 2846163953Srrs ptype = ntohs(ph->param_type); 2847163953Srrs plen = ntohs(ph->param_length); 2848163953Srrs if (ptype == SCTP_IPV6_ADDRESS) { 2849163953Srrs struct sctp_ipv6addr_param *a6p; 2850163953Srrs 2851163953Srrs /* get the entire IPv6 address param */ 2852163953Srrs a6p = (struct sctp_ipv6addr_param *) 2853163953Srrs sctp_m_getptr(m, offset, 2854163953Srrs sizeof(struct sctp_ipv6addr_param), 2855163953Srrs (uint8_t *) & addr_store); 2856163953Srrs if (plen != sizeof(struct sctp_ipv6addr_param) || 2857163953Srrs a6p == NULL) { 2858163953Srrs return; 2859163953Srrs } 2860163953Srrs memcpy(&sin6.sin6_addr, a6p->addr, 2861163953Srrs sizeof(struct in6_addr)); 2862163953Srrs sa = (struct sockaddr *)&sin6; 2863163953Srrs } else if (ptype == SCTP_IPV4_ADDRESS) { 2864163953Srrs struct sctp_ipv4addr_param *a4p; 2865163953Srrs 2866163953Srrs /* get the entire IPv4 address param */ 2867167598Srrs a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2868167598Srrs sizeof(struct sctp_ipv4addr_param), 2869167598Srrs (uint8_t *) & addr_store); 2870163953Srrs if (plen != sizeof(struct sctp_ipv4addr_param) || 2871163953Srrs a4p == NULL) { 2872163953Srrs return; 2873163953Srrs } 2874163953Srrs sin.sin_addr.s_addr = a4p->addr; 2875163953Srrs sa = (struct sockaddr *)&sin; 2876163953Srrs } else { 2877163953Srrs goto next_addr; 2878163953Srrs } 2879163953Srrs 2880163953Srrs /* see if this address really (still) exists */ 2881168299Srrs if (stcb) { 2882168299Srrs vrf_id = stcb->asoc.vrf_id; 2883168299Srrs } else { 2884168299Srrs vrf_id = SCTP_DEFAULT_VRFID; 2885168299Srrs } 2886172190Srrs sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id, 2887172190Srrs SCTP_ADDR_NOT_LOCKED); 2888167598Srrs if (sctp_ifa == NULL) { 2889163953Srrs /* address doesn't exist anymore */ 2890163953Srrs int status; 2891163953Srrs 2892163953Srrs /* are ASCONFs allowed ? */ 2893163953Srrs if ((sctp_is_feature_on(stcb->sctp_ep, 2894163953Srrs SCTP_PCB_FLAGS_DO_ASCONF)) && 2895163953Srrs stcb->asoc.peer_supports_asconf) { 2896163953Srrs /* queue an ASCONF DEL_IP_ADDRESS */ 2897172190Srrs status = sctp_asconf_queue_sa_delete(stcb, sa); 2898163953Srrs /* 2899171572Srrs * if queued ok, and in correct state, send 2900171572Srrs * out the ASCONF. 2901163953Srrs */ 2902163953Srrs if (status == 0 && 2903163953Srrs SCTP_GET_STATE(&stcb->asoc) == 2904163953Srrs SCTP_STATE_OPEN) { 2905171572Srrs#ifdef SCTP_TIMER_BASED_ASCONF 2906163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2907163953Srrs stcb->sctp_ep, stcb, 2908163953Srrs stcb->asoc.primary_destination); 2909171572Srrs#else 2910172190Srrs sctp_send_asconf(stcb, stcb->asoc.primary_destination, 2911172190Srrs SCTP_ADDR_NOT_LOCKED); 2912171572Srrs#endif 2913163953Srrs } 2914163953Srrs } 2915163953Srrs } 2916163953Srrsnext_addr: 2917163953Srrs /* 2918163953Srrs * Sanity check: Make sure the length isn't 0, otherwise 2919163953Srrs * we'll be stuck in this loop for a long time... 2920163953Srrs */ 2921163953Srrs if (SCTP_SIZE32(plen) == 0) { 2922169420Srrs SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2923163953Srrs plen, ptype); 2924163953Srrs return; 2925163953Srrs } 2926163953Srrs /* get next parameter */ 2927163953Srrs offset += SCTP_SIZE32(plen); 2928163953Srrs if ((offset + sizeof(struct sctp_paramhdr)) > length) 2929163953Srrs return; 2930163953Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2931163953Srrs sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2932163953Srrs } /* while */ 2933163953Srrs} 2934163953Srrs 2935163953Srrs/* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2936163953Srrs/* 2937163953Srrs * checks to see if a specific address is in the initack address list returns 2938163953Srrs * 1 if found, 0 if not 2939163953Srrs */ 2940163953Srrsstatic uint32_t 2941163953Srrssctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, uint32_t offset, 2942163953Srrs uint32_t length, struct sockaddr *sa) 2943163953Srrs{ 2944163953Srrs struct sctp_paramhdr tmp_param, *ph; 2945163953Srrs uint16_t plen, ptype; 2946163953Srrs struct sctp_ipv6addr_param addr_store; 2947163953Srrs struct sockaddr_in *sin; 2948163953Srrs struct sctp_ipv4addr_param *a4p; 2949163953Srrs 2950163953Srrs#ifdef INET6 2951167598Srrs struct sockaddr_in6 *sin6; 2952163953Srrs struct sctp_ipv6addr_param *a6p; 2953167598Srrs struct sockaddr_in6 sin6_tmp; 2954163953Srrs 2955163953Srrs#endif /* INET6 */ 2956163953Srrs 2957163953Srrs if ( 2958163953Srrs#ifdef INET6 2959163953Srrs (sa->sa_family != AF_INET6) && 2960163953Srrs#endif /* INET6 */ 2961163953Srrs (sa->sa_family != AF_INET)) 2962163953Srrs return (0); 2963163953Srrs 2964169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2965169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2966163953Srrs /* convert to upper bound */ 2967163953Srrs length += offset; 2968163953Srrs 2969163953Srrs if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2970169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2971169420Srrs "find_initack_addr: invalid offset?\n"); 2972163953Srrs return (0); 2973163953Srrs } 2974163953Srrs /* go through the addresses in the init-ack */ 2975163953Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2976163953Srrs sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2977163953Srrs while (ph != NULL) { 2978163953Srrs ptype = ntohs(ph->param_type); 2979163953Srrs plen = ntohs(ph->param_length); 2980163953Srrs#ifdef INET6 2981163953Srrs if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) { 2982163953Srrs /* get the entire IPv6 address param */ 2983163953Srrs a6p = (struct sctp_ipv6addr_param *) 2984163953Srrs sctp_m_getptr(m, offset, 2985163953Srrs sizeof(struct sctp_ipv6addr_param), 2986163953Srrs (uint8_t *) & addr_store); 2987163953Srrs if (plen != sizeof(struct sctp_ipv6addr_param) || 2988169420Srrs (ph == NULL) || 2989169420Srrs (a6p == NULL)) { 2990163953Srrs return (0); 2991163953Srrs } 2992163953Srrs sin6 = (struct sockaddr_in6 *)sa; 2993163953Srrs if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2994163953Srrs /* create a copy and clear scope */ 2995163953Srrs memcpy(&sin6_tmp, sin6, 2996163953Srrs sizeof(struct sockaddr_in6)); 2997163953Srrs sin6 = &sin6_tmp; 2998163953Srrs in6_clearscope(&sin6->sin6_addr); 2999163953Srrs } 3000163953Srrs if (memcmp(&sin6->sin6_addr, a6p->addr, 3001163953Srrs sizeof(struct in6_addr)) == 0) { 3002163953Srrs /* found it */ 3003163953Srrs return (1); 3004163953Srrs } 3005163953Srrs } else 3006163953Srrs#endif /* INET6 */ 3007163953Srrs 3008163953Srrs if (ptype == SCTP_IPV4_ADDRESS && 3009163953Srrs sa->sa_family == AF_INET) { 3010163953Srrs /* get the entire IPv4 address param */ 3011163953Srrs a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, 3012163953Srrs offset, sizeof(struct sctp_ipv4addr_param), 3013163953Srrs (uint8_t *) & addr_store); 3014163953Srrs if (plen != sizeof(struct sctp_ipv4addr_param) || 3015169420Srrs (ph == NULL) || 3016169420Srrs (a4p == NULL)) { 3017163953Srrs return (0); 3018163953Srrs } 3019163953Srrs sin = (struct sockaddr_in *)sa; 3020163953Srrs if (sin->sin_addr.s_addr == a4p->addr) { 3021163953Srrs /* found it */ 3022163953Srrs return (1); 3023163953Srrs } 3024163953Srrs } 3025163953Srrs /* get next parameter */ 3026163953Srrs offset += SCTP_SIZE32(plen); 3027163953Srrs if (offset + sizeof(struct sctp_paramhdr) > length) 3028163953Srrs return (0); 3029163953Srrs ph = (struct sctp_paramhdr *) 3030163953Srrs sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 3031163953Srrs (uint8_t *) & tmp_param); 3032163953Srrs } /* while */ 3033163953Srrs /* not found! */ 3034163953Srrs return (0); 3035163953Srrs} 3036163953Srrs 3037163953Srrs/* 3038163953Srrs * makes sure that the current endpoint local addr list is consistent with 3039163953Srrs * the new association (eg. subset bound, asconf allowed) adds addresses as 3040163953Srrs * necessary 3041163953Srrs */ 3042163953Srrsstatic void 3043163953Srrssctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3044163953Srrs int length, struct sockaddr *init_addr) 3045163953Srrs{ 3046163953Srrs struct sctp_laddr *laddr; 3047163953Srrs 3048163953Srrs /* go through the endpoint list */ 3049163953Srrs LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3050163953Srrs /* be paranoid and validate the laddr */ 3051163953Srrs if (laddr->ifa == NULL) { 3052169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 3053169420Srrs "check_addr_list_ep: laddr->ifa is NULL"); 3054163953Srrs continue; 3055163953Srrs } 3056167598Srrs if (laddr->ifa == NULL) { 3057169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 3058163953Srrs continue; 3059163953Srrs } 3060163953Srrs /* do i have it implicitly? */ 3061167598Srrs if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 3062163953Srrs continue; 3063163953Srrs } 3064163953Srrs /* check to see if in the init-ack */ 3065163953Srrs if (!sctp_addr_in_initack(stcb, m, offset, length, 3066167598Srrs &laddr->ifa->address.sa)) { 3067163953Srrs /* try to add it */ 3068163953Srrs sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 3069172190Srrs SCTP_ADD_IP_ADDRESS, SCTP_ADDR_NOT_LOCKED); 3070163953Srrs } 3071163953Srrs } 3072163953Srrs} 3073163953Srrs 3074163953Srrs/* 3075163953Srrs * makes sure that the current kernel address list is consistent with the new 3076163953Srrs * association (with all addrs bound) adds addresses as necessary 3077163953Srrs */ 3078163953Srrsstatic void 3079163953Srrssctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3080163953Srrs int length, struct sockaddr *init_addr, 3081163953Srrs uint16_t local_scope, uint16_t site_scope, 3082163953Srrs uint16_t ipv4_scope, uint16_t loopback_scope) 3083163953Srrs{ 3084167598Srrs struct sctp_vrf *vrf = NULL; 3085167598Srrs struct sctp_ifn *sctp_ifn; 3086167598Srrs struct sctp_ifa *sctp_ifa; 3087167598Srrs uint32_t vrf_id; 3088163953Srrs 3089168299Srrs if (stcb) { 3090168299Srrs vrf_id = stcb->asoc.vrf_id; 3091168299Srrs } else { 3092169420Srrs return; 3093168299Srrs } 3094172218Srrs SCTP_IPI_ADDR_RLOCK(); 3095167598Srrs vrf = sctp_find_vrf(vrf_id); 3096167598Srrs if (vrf == NULL) { 3097172218Srrs SCTP_IPI_ADDR_RUNLOCK(); 3098167598Srrs return; 3099167598Srrs } 3100163953Srrs /* go through all our known interfaces */ 3101167598Srrs LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3102167598Srrs if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3103163953Srrs /* skip loopback interface */ 3104163953Srrs continue; 3105163953Srrs } 3106163953Srrs /* go through each interface address */ 3107167598Srrs LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3108163953Srrs /* do i have it implicitly? */ 3109167598Srrs if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 3110163953Srrs continue; 3111163953Srrs } 3112163953Srrs /* check to see if in the init-ack */ 3113163953Srrs if (!sctp_addr_in_initack(stcb, m, offset, length, 3114167598Srrs &sctp_ifa->address.sa)) { 3115163953Srrs /* try to add it */ 3116163953Srrs sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 3117172190Srrs sctp_ifa, SCTP_ADD_IP_ADDRESS, 3118172190Srrs SCTP_ADDR_LOCKED); 3119163953Srrs } 3120163953Srrs } /* end foreach ifa */ 3121163953Srrs } /* end foreach ifn */ 3122172218Srrs SCTP_IPI_ADDR_RUNLOCK(); 3123163953Srrs} 3124163953Srrs 3125163953Srrs/* 3126163953Srrs * validates an init-ack chunk (from a cookie-echo) with current addresses 3127163953Srrs * adds addresses from the init-ack into our local address list, if needed 3128163953Srrs * queues asconf adds/deletes addresses as needed and makes appropriate list 3129163953Srrs * changes for source address selection m, offset: points to the start of the 3130163953Srrs * address list in an init-ack chunk length: total length of the address 3131163953Srrs * params only init_addr: address where my INIT-ACK was sent from 3132163953Srrs */ 3133163953Srrsvoid 3134163953Srrssctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 3135163953Srrs int length, struct sockaddr *init_addr, 3136163953Srrs uint16_t local_scope, uint16_t site_scope, 3137163953Srrs uint16_t ipv4_scope, uint16_t loopback_scope) 3138163953Srrs{ 3139163953Srrs /* process the local addresses in the initack */ 3140163953Srrs sctp_process_initack_addresses(stcb, m, offset, length); 3141163953Srrs 3142163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3143163953Srrs /* bound all case */ 3144163953Srrs sctp_check_address_list_all(stcb, m, offset, length, init_addr, 3145163953Srrs local_scope, site_scope, ipv4_scope, loopback_scope); 3146163953Srrs } else { 3147163953Srrs /* subset bound case */ 3148163953Srrs if (sctp_is_feature_on(stcb->sctp_ep, 3149163953Srrs SCTP_PCB_FLAGS_DO_ASCONF)) { 3150163953Srrs /* asconf's allowed */ 3151163953Srrs sctp_check_address_list_ep(stcb, m, offset, length, 3152163953Srrs init_addr); 3153163953Srrs } 3154163953Srrs /* else, no asconfs allowed, so what we sent is what we get */ 3155163953Srrs } 3156163953Srrs} 3157163953Srrs 3158163953Srrs/* 3159163953Srrs * sctp_bindx() support 3160163953Srrs */ 3161163953Srrsuint32_t 3162169655Srrssctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 3163170744Srrs uint32_t type, uint32_t vrf_id, struct sctp_ifa *sctp_ifap) 3164163953Srrs{ 3165167598Srrs struct sctp_ifa *ifa; 3166163953Srrs 3167167598Srrs if (sa->sa_len == 0) { 3168171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3169163953Srrs return (EINVAL); 3170167598Srrs } 3171170744Srrs if (sctp_ifap) { 3172170744Srrs ifa = sctp_ifap; 3173170744Srrs } else if (type == SCTP_ADD_IP_ADDRESS) { 3174167598Srrs /* For an add the address MUST be on the system */ 3175172091Srrs ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); 3176167598Srrs } else if (type == SCTP_DEL_IP_ADDRESS) { 3177167598Srrs /* For a delete we need to find it in the inp */ 3178172091Srrs ifa = sctp_find_ifa_in_ep(inp, sa, SCTP_ADDR_NOT_LOCKED); 3179167598Srrs } else { 3180167598Srrs ifa = NULL; 3181167598Srrs } 3182163953Srrs if (ifa != NULL) { 3183167598Srrs /* add this address */ 3184167598Srrs struct sctp_asconf_iterator *asc; 3185167598Srrs struct sctp_laddr *wi; 3186163953Srrs 3187167598Srrs SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 3188169655Srrs sizeof(struct sctp_asconf_iterator), 3189170091Srrs SCTP_M_ASC_IT); 3190167598Srrs if (asc == NULL) { 3191171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3192167598Srrs return (ENOMEM); 3193167598Srrs } 3194179783Srrs wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), 3195169655Srrs struct sctp_laddr); 3196167598Srrs if (wi == NULL) { 3197170091Srrs SCTP_FREE(asc, SCTP_M_ASC_IT); 3198171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, ENOMEM); 3199167598Srrs return (ENOMEM); 3200167598Srrs } 3201167598Srrs if (type == SCTP_ADD_IP_ADDRESS) { 3202167598Srrs sctp_add_local_addr_ep(inp, ifa, type); 3203167598Srrs } else if (type == SCTP_DEL_IP_ADDRESS) { 3204167598Srrs struct sctp_laddr *laddr; 3205167598Srrs 3206169655Srrs if (inp->laddr_count < 2) { 3207169655Srrs /* can't delete the last local address */ 3208170931Srrs SCTP_FREE(asc, SCTP_M_ASC_IT); 3209179783Srrs SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 3210171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EINVAL); 3211169655Srrs return (EINVAL); 3212169655Srrs } 3213169655Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, 3214169655Srrs sctp_nxt_addr) { 3215167598Srrs if (ifa == laddr->ifa) { 3216167598Srrs /* Mark in the delete */ 3217167598Srrs laddr->action = type; 3218167598Srrs } 3219163953Srrs } 3220163953Srrs } 3221167598Srrs LIST_INIT(&asc->list_of_work); 3222167598Srrs asc->cnt = 1; 3223167598Srrs SCTP_INCR_LADDR_COUNT(); 3224167598Srrs wi->ifa = ifa; 3225167598Srrs wi->action = type; 3226167598Srrs atomic_add_int(&ifa->refcount, 1); 3227167598Srrs LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 3228171572Srrs (void)sctp_initiate_iterator(sctp_asconf_iterator_ep, 3229171572Srrs sctp_asconf_iterator_stcb, 3230171572Srrs sctp_asconf_iterator_ep_end, 3231167598Srrs SCTP_PCB_ANY_FLAGS, 3232169655Srrs SCTP_PCB_ANY_FEATURES, 3233171572Srrs SCTP_ASOC_ANY_STATE, 3234171572Srrs (void *)asc, 0, 3235171572Srrs sctp_asconf_iterator_end, inp, 0); 3236163953Srrs } else { 3237163953Srrs /* invalid address! */ 3238171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_ASCONF, EADDRNOTAVAIL); 3239163953Srrs return (EADDRNOTAVAIL); 3240163953Srrs } 3241163953Srrs return (0); 3242163953Srrs} 3243185694Srrs 3244185694Srrsvoid 3245185694Srrssctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, 3246185694Srrs struct sctp_nets *net) 3247185694Srrs{ 3248185694Srrs struct sctp_asconf_addr *aa; 3249185694Srrs struct sctp_ifa *sctp_ifap; 3250185694Srrs struct sctp_asconf_tag_param *vtag; 3251185694Srrs struct sockaddr_in *to; 3252185694Srrs 3253185694Srrs#ifdef INET6 3254185694Srrs struct sockaddr_in6 *to6; 3255185694Srrs 3256185694Srrs#endif 3257185694Srrs if (net == NULL) { 3258185694Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing net\n"); 3259185694Srrs return; 3260185694Srrs } 3261185694Srrs if (stcb == NULL) { 3262185694Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "sctp_asconf_send_nat_state_update: Missing stcb\n"); 3263185694Srrs return; 3264185694Srrs } 3265185694Srrs /* 3266185694Srrs * Need to have in the asconf: - vtagparam(my_vtag/peer_vtag) - 3267185694Srrs * add(0.0.0.0) - del(0.0.0.0) - Any global addresses add(addr) 3268185694Srrs */ 3269185694Srrs SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3270185694Srrs SCTP_M_ASC_ADDR); 3271185694Srrs if (aa == NULL) { 3272185694Srrs /* didn't get memory */ 3273185694Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 3274185694Srrs "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3275185694Srrs return; 3276185694Srrs } 3277185694Srrs aa->special_del = 0; 3278185694Srrs /* fill in asconf address parameter fields */ 3279185694Srrs /* top level elements are "networked" during send */ 3280185694Srrs aa->ifa = NULL; 3281185694Srrs aa->sent = 0; /* clear sent flag */ 3282185694Srrs vtag = (struct sctp_asconf_tag_param *)&aa->ap.aph; 3283185694Srrs vtag->aph.ph.param_type = SCTP_NAT_VTAGS; 3284185694Srrs vtag->aph.ph.param_length = sizeof(struct sctp_asconf_tag_param); 3285185694Srrs vtag->local_vtag = htonl(stcb->asoc.my_vtag); 3286185694Srrs vtag->remote_vtag = htonl(stcb->asoc.peer_vtag); 3287185694Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3288185694Srrs 3289185694Srrs SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3290185694Srrs SCTP_M_ASC_ADDR); 3291185694Srrs if (aa == NULL) { 3292185694Srrs /* didn't get memory */ 3293185694Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 3294185694Srrs "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3295185694Srrs return; 3296185694Srrs } 3297185694Srrs memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3298185694Srrs /* fill in asconf address parameter fields */ 3299185694Srrs /* ADD(0.0.0.0) */ 3300185694Srrs if (net->ro._l_addr.sa.sa_family == AF_INET) { 3301185694Srrs aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3302185694Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3303185694Srrs aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3304185694Srrs aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3305185694Srrs /* No need to add an address, we are using 0.0.0.0 */ 3306185694Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3307185694Srrs } 3308185694Srrs#ifdef INET6 3309185694Srrs else if (net->ro._l_addr.sa.sa_family == AF_INET6) { 3310185694Srrs aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3311185694Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3312185694Srrs aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3313185694Srrs aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3314185694Srrs /* No need to add an address, we are using 0.0.0.0 */ 3315185694Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3316185694Srrs } 3317185694Srrs#endif /* INET6 */ 3318185694Srrs SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), 3319185694Srrs SCTP_M_ASC_ADDR); 3320185694Srrs if (aa == NULL) { 3321185694Srrs /* didn't get memory */ 3322185694Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 3323185694Srrs "sctp_asconf_send_nat_state_update: failed to get memory!\n"); 3324185694Srrs return; 3325185694Srrs } 3326185694Srrs memset(aa, 0, sizeof(struct sctp_asconf_addr)); 3327185694Srrs /* fill in asconf address parameter fields */ 3328185694Srrs /* ADD(0.0.0.0) */ 3329185694Srrs if (net->ro._l_addr.sa.sa_family == AF_INET) { 3330185694Srrs aa->ap.aph.ph.param_type = SCTP_ADD_IP_ADDRESS; 3331185694Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addrv4_param); 3332185694Srrs aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 3333185694Srrs aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv4addr_param); 3334185694Srrs /* No need to add an address, we are using 0.0.0.0 */ 3335185694Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3336185694Srrs } 3337185694Srrs#ifdef INET6 3338185694Srrs else if (net->ro._l_addr.sa.sa_family == AF_INET6) { 3339185694Srrs aa->ap.aph.ph.param_type = SCTP_DEL_IP_ADDRESS; 3340185694Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_addr_param); 3341185694Srrs aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 3342185694Srrs aa->ap.addrp.ph.param_length = sizeof(struct sctp_ipv6addr_param); 3343185694Srrs /* No need to add an address, we are using 0.0.0.0 */ 3344185694Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 3345185694Srrs } 3346185694Srrs#endif /* INET6 */ 3347185694Srrs /* Now we must hunt the addresses and add all global addresses */ 3348185694Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3349185694Srrs struct sctp_vrf *vrf = NULL; 3350185694Srrs struct sctp_ifn *sctp_ifnp; 3351185694Srrs uint32_t vrf_id; 3352185694Srrs 3353185694Srrs vrf_id = stcb->sctp_ep->def_vrf_id; 3354185694Srrs vrf = sctp_find_vrf(vrf_id); 3355185694Srrs if (vrf == NULL) { 3356185694Srrs goto skip_rest; 3357185694Srrs } 3358185694Srrs SCTP_IPI_ADDR_RLOCK(); 3359185694Srrs LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 3360185694Srrs LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 3361185694Srrs if (sctp_ifap->address.sa.sa_family == AF_INET) { 3362185694Srrs to = &sctp_ifap->address.sin; 3363185694Srrs 3364185694Srrs if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3365185694Srrs continue; 3366185694Srrs } 3367185694Srrs if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3368185694Srrs continue; 3369185694Srrs } 3370185694Srrs } 3371185694Srrs#ifdef INET6 3372185694Srrs else if (sctp_ifap->address.sa.sa_family == AF_INET6) { 3373185694Srrs to6 = &sctp_ifap->address.sin6; 3374185694Srrs if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3375185694Srrs continue; 3376185694Srrs } 3377185694Srrs if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3378185694Srrs continue; 3379185694Srrs } 3380185694Srrs } 3381185694Srrs#endif 3382185694Srrs sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3383185694Srrs } 3384185694Srrs } 3385185694Srrs SCTP_IPI_ADDR_RUNLOCK(); 3386185694Srrs } else { 3387185694Srrs struct sctp_laddr *laddr; 3388185694Srrs 3389185694Srrs LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 3390185694Srrs if (laddr->ifa == NULL) { 3391185694Srrs continue; 3392185694Srrs } 3393185694Srrs if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 3394185694Srrs /* 3395185694Srrs * Address being deleted by the system, dont 3396185694Srrs * list. 3397185694Srrs */ 3398185694Srrs continue; 3399185694Srrs if (laddr->action == SCTP_DEL_IP_ADDRESS) { 3400185694Srrs /* 3401185694Srrs * Address being deleted on this ep don't 3402185694Srrs * list. 3403185694Srrs */ 3404185694Srrs continue; 3405185694Srrs } 3406185694Srrs sctp_ifap = laddr->ifa; 3407185694Srrs if (sctp_ifap->address.sa.sa_family == AF_INET) { 3408185694Srrs to = &sctp_ifap->address.sin; 3409185694Srrs 3410185694Srrs if (IN4_ISPRIVATE_ADDRESS(&to->sin_addr)) { 3411185694Srrs continue; 3412185694Srrs } 3413185694Srrs if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3414185694Srrs continue; 3415185694Srrs } 3416185694Srrs } 3417185694Srrs#ifdef INET6 3418185694Srrs else if (sctp_ifap->address.sa.sa_family == AF_INET6) { 3419185694Srrs to6 = &sctp_ifap->address.sin6; 3420185694Srrs if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) { 3421185694Srrs continue; 3422185694Srrs } 3423185694Srrs if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3424185694Srrs continue; 3425185694Srrs } 3426185694Srrs } 3427185694Srrs#endif 3428185694Srrs sctp_asconf_queue_mgmt(stcb, sctp_ifap, SCTP_ADD_IP_ADDRESS); 3429185694Srrs } 3430185694Srrs } 3431185694Srrsskip_rest: 3432185694Srrs /* Now we must send the asconf into the queue */ 3433185694Srrs sctp_send_asconf(stcb, net, 0); 3434185694Srrs} 3435