sctp_asconf.c revision 170091
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 170091 2007-05-29 09:29:03Z 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> 43163953Srrs 44163953Srrs/* 45163953Srrs * debug flags: 46163953Srrs * SCTP_DEBUG_ASCONF1: protocol info, general info and errors 47163953Srrs * SCTP_DEBUG_ASCONF2: detailed info 48163953Srrs */ 49163953Srrs#ifdef SCTP_DEBUG 50163953Srrs#endif /* SCTP_DEBUG */ 51163953Srrs 52163953Srrs 53169420Srrsstatic void 54163953Srrssctp_asconf_get_source_ip(struct mbuf *m, struct sockaddr *sa) 55163953Srrs{ 56163953Srrs struct ip *iph; 57163953Srrs struct sockaddr_in *sin; 58163953Srrs 59163953Srrs#ifdef INET6 60163953Srrs struct sockaddr_in6 *sin6; 61163953Srrs 62163953Srrs#endif 63163953Srrs 64163953Srrs iph = mtod(m, struct ip *); 65163953Srrs if (iph->ip_v == IPVERSION) { 66163953Srrs /* IPv4 source */ 67163953Srrs sin = (struct sockaddr_in *)sa; 68163953Srrs bzero(sin, sizeof(*sin)); 69163953Srrs sin->sin_family = AF_INET; 70163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 71163953Srrs sin->sin_port = 0; 72163953Srrs sin->sin_addr.s_addr = iph->ip_src.s_addr; 73169420Srrs return; 74163953Srrs } 75163953Srrs#ifdef INET6 76163953Srrs else if (iph->ip_v == (IPV6_VERSION >> 4)) { 77163953Srrs /* IPv6 source */ 78163953Srrs struct ip6_hdr *ip6; 79163953Srrs 80163953Srrs sin6 = (struct sockaddr_in6 *)sa; 81163953Srrs bzero(sin6, sizeof(*sin6)); 82163953Srrs sin6->sin6_family = AF_INET6; 83163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 84163953Srrs sin6->sin6_port = 0; 85163953Srrs ip6 = mtod(m, struct ip6_hdr *); 86163953Srrs sin6->sin6_addr = ip6->ip6_src; 87169420Srrs return; 88163953Srrs } 89163953Srrs#endif /* INET6 */ 90163953Srrs else 91169420Srrs return; 92163953Srrs} 93163953Srrs 94163953Srrs/* 95163953Srrs * draft-ietf-tsvwg-addip-sctp 96163953Srrs * 97163953Srrs * Address management only currently supported For the bound all case: the asoc 98163953Srrs * local addr list is always a "DO NOT USE" list For the subset bound case: 99163953Srrs * If ASCONFs are allowed: the endpoint local addr list is the usable address 100163953Srrs * list the asoc local addr list is the "DO NOT USE" list If ASCONFs are not 101163953Srrs * allowed: the endpoint local addr list is the default usable list the asoc 102163953Srrs * local addr list is the usable address list 103163953Srrs * 104163953Srrs * An ASCONF parameter queue exists per asoc which holds the pending address 105163953Srrs * operations. Lists are updated upon receipt of ASCONF-ACK. 106163953Srrs * 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/* 113163953Srrs * ASCONF parameter processing response_required: set if a reply is required 114163953Srrs * (eg. SUCCESS_REPORT) returns a mbuf to an "error" response parameter or 115163953Srrs * NULL/"success" if ok FIX: allocating this many mbufs on the fly is pretty 116163953Srrs * 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 */ 267165647Srrs if (zero_address && 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 */ 284163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_ADD_IP, stcb, 0, sa); 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 299163953Srrssctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, 300163953Srrs struct sockaddr *src) 301163953Srrs{ 302163953Srrs struct sctp_nets *src_net, *net; 303163953Srrs 304163953Srrs /* make sure the source address exists as a destination net */ 305163953Srrs src_net = sctp_findnet(stcb, src); 306163953Srrs if (src_net == NULL) { 307163953Srrs /* not found */ 308163953Srrs return -1; 309163953Srrs } 310163953Srrs /* delete all destination addresses except the source */ 311163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 312163953Srrs if (net != src_net) { 313163953Srrs /* delete this address */ 314163953Srrs sctp_remove_net(stcb, net); 315169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 316169420Srrs "asconf_del_remote_addrs_except: deleting "); 317169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, 318169420Srrs (struct sockaddr *)&net->ro._l_addr); 319163953Srrs /* notify upper layer */ 320163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, 321163953Srrs (struct sockaddr *)&net->ro._l_addr); 322163953Srrs } 323163953Srrs } 324163953Srrs return 0; 325163953Srrs} 326163953Srrs 327163953Srrsstatic struct mbuf * 328163953Srrssctp_process_asconf_delete_ip(struct mbuf *m, struct sctp_asconf_paramhdr *aph, 329163953Srrs struct sctp_tcb *stcb, int response_required) 330163953Srrs{ 331163953Srrs struct mbuf *m_reply = NULL; 332163953Srrs struct sockaddr_storage sa_source, sa_store; 333163953Srrs struct sctp_ipv4addr_param *v4addr; 334163953Srrs uint16_t param_type, param_length, aparam_length; 335163953Srrs struct sockaddr *sa; 336163953Srrs struct sockaddr_in *sin; 337163953Srrs int zero_address = 0; 338163953Srrs int result; 339163953Srrs 340163953Srrs#ifdef INET6 341163953Srrs struct sockaddr_in6 *sin6; 342163953Srrs struct sctp_ipv6addr_param *v6addr; 343163953Srrs 344163953Srrs#endif /* INET6 */ 345163953Srrs 346163953Srrs /* get the source IP address for src and 0.0.0.0/::0 delete checks */ 347163953Srrs sctp_asconf_get_source_ip(m, (struct sockaddr *)&sa_source); 348163953Srrs 349163953Srrs aparam_length = ntohs(aph->ph.param_length); 350163953Srrs v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 351163953Srrs#ifdef INET6 352163953Srrs v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 353163953Srrs#endif /* INET6 */ 354163953Srrs param_type = ntohs(v4addr->ph.param_type); 355163953Srrs param_length = ntohs(v4addr->ph.param_length); 356163953Srrs 357163953Srrs sa = (struct sockaddr *)&sa_store; 358163953Srrs switch (param_type) { 359163953Srrs case SCTP_IPV4_ADDRESS: 360163953Srrs if (param_length != sizeof(struct sctp_ipv4addr_param)) { 361163953Srrs /* invalid param size */ 362163953Srrs return NULL; 363163953Srrs } 364163953Srrs sin = (struct sockaddr_in *)&sa_store; 365163953Srrs bzero(sin, sizeof(*sin)); 366163953Srrs sin->sin_family = AF_INET; 367163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 368163953Srrs sin->sin_port = stcb->rport; 369163953Srrs sin->sin_addr.s_addr = v4addr->addr; 370163953Srrs if (sin->sin_addr.s_addr == INADDR_ANY) 371163953Srrs zero_address = 1; 372169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 373169420Srrs "process_asconf_delete_ip: deleting "); 374169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 375163953Srrs break; 376163953Srrs case SCTP_IPV6_ADDRESS: 377163953Srrs if (param_length != sizeof(struct sctp_ipv6addr_param)) { 378163953Srrs /* invalid param size */ 379163953Srrs return NULL; 380163953Srrs } 381163953Srrs#ifdef INET6 382163953Srrs sin6 = (struct sockaddr_in6 *)&sa_store; 383163953Srrs bzero(sin6, sizeof(*sin6)); 384163953Srrs sin6->sin6_family = AF_INET6; 385163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 386163953Srrs sin6->sin6_port = stcb->rport; 387163953Srrs memcpy(&sin6->sin6_addr, v6addr->addr, 388163953Srrs sizeof(struct in6_addr)); 389163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 390163953Srrs zero_address = 1; 391169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 392169420Srrs "process_asconf_delete_ip: deleting "); 393169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 394163953Srrs#else 395163953Srrs /* IPv6 not enabled! No "action" needed; just ack it */ 396169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 397169420Srrs "process_asconf_delete_ip: v6 disabled- ignoring: "); 398169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 399163953Srrs /* just respond with a "success" ASCONF-ACK */ 400163953Srrs return NULL; 401169420Srrs#endif 402163953Srrs break; 403163953Srrs default: 404163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 405163953Srrs SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 406163953Srrs aparam_length); 407163953Srrs return m_reply; 408163953Srrs } 409163953Srrs 410163953Srrs /* make sure the source address is not being deleted */ 411163953Srrs if (sctp_cmpaddr(sa, (struct sockaddr *)&sa_source)) { 412163953Srrs /* trying to delete the source address! */ 413169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete source addr\n"); 414163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 415163953Srrs SCTP_CAUSE_DELETING_SRC_ADDR, (uint8_t *) aph, 416163953Srrs aparam_length); 417163953Srrs return m_reply; 418163953Srrs } 419163953Srrs /* if deleting 0.0.0.0/::0, delete all addresses except src addr */ 420165647Srrs if (zero_address && sctp_nat_friendly) { 421163953Srrs result = sctp_asconf_del_remote_addrs_except(stcb, 422163953Srrs (struct sockaddr *)&sa_source); 423163953Srrs 424163953Srrs if (result) { 425163953Srrs /* src address did not exist? */ 426169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: src addr does not exist?\n"); 427163953Srrs /* what error to reply with?? */ 428163953Srrs m_reply = 429163953Srrs sctp_asconf_error_response(aph->correlation_id, 430163953Srrs SCTP_CAUSE_REQUEST_REFUSED, (uint8_t *) aph, 431163953Srrs aparam_length); 432163953Srrs } else if (response_required) { 433163953Srrs m_reply = 434163953Srrs sctp_asconf_success_response(aph->correlation_id); 435163953Srrs } 436163953Srrs return m_reply; 437163953Srrs } 438163953Srrs /* delete the address */ 439163953Srrs result = sctp_del_remote_addr(stcb, sa); 440163953Srrs /* 441163953Srrs * note if result == -2, the address doesn't exist in the asoc but 442163953Srrs * since it's being deleted anyways, we just ack the delete -- but 443163953Srrs * this probably means something has already gone awry 444163953Srrs */ 445163953Srrs if (result == -1) { 446163953Srrs /* only one address in the asoc */ 447169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_delete_ip: tried to delete last IP addr!\n"); 448163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 449163953Srrs SCTP_CAUSE_DELETING_LAST_ADDR, (uint8_t *) aph, 450163953Srrs aparam_length); 451163953Srrs } else { 452163953Srrs if (response_required) { 453163953Srrs m_reply = sctp_asconf_success_response(aph->correlation_id); 454163953Srrs } 455163953Srrs /* notify upper layer */ 456163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, sa); 457163953Srrs } 458163953Srrs return m_reply; 459163953Srrs} 460163953Srrs 461163953Srrsstatic struct mbuf * 462163953Srrssctp_process_asconf_set_primary(struct mbuf *m, 463163953Srrs struct sctp_asconf_paramhdr *aph, struct sctp_tcb *stcb, 464163953Srrs int response_required) 465163953Srrs{ 466163953Srrs struct mbuf *m_reply = NULL; 467163953Srrs struct sockaddr_storage sa_source, sa_store; 468163953Srrs struct sctp_ipv4addr_param *v4addr; 469163953Srrs uint16_t param_type, param_length, aparam_length; 470163953Srrs struct sockaddr *sa; 471163953Srrs struct sockaddr_in *sin; 472163953Srrs int zero_address = 0; 473163953Srrs 474163953Srrs#ifdef INET6 475163953Srrs struct sockaddr_in6 *sin6; 476163953Srrs struct sctp_ipv6addr_param *v6addr; 477163953Srrs 478163953Srrs#endif /* INET6 */ 479163953Srrs 480163953Srrs aparam_length = ntohs(aph->ph.param_length); 481163953Srrs v4addr = (struct sctp_ipv4addr_param *)(aph + 1); 482163953Srrs#ifdef INET6 483163953Srrs v6addr = (struct sctp_ipv6addr_param *)(aph + 1); 484163953Srrs#endif /* INET6 */ 485163953Srrs param_type = ntohs(v4addr->ph.param_type); 486163953Srrs param_length = ntohs(v4addr->ph.param_length); 487163953Srrs 488163953Srrs sa = (struct sockaddr *)&sa_store; 489163953Srrs switch (param_type) { 490163953Srrs case SCTP_IPV4_ADDRESS: 491163953Srrs if (param_length != sizeof(struct sctp_ipv4addr_param)) { 492163953Srrs /* invalid param size */ 493163953Srrs return NULL; 494163953Srrs } 495163953Srrs sin = (struct sockaddr_in *)&sa_store; 496163953Srrs bzero(sin, sizeof(*sin)); 497163953Srrs sin->sin_family = AF_INET; 498163953Srrs sin->sin_len = sizeof(struct sockaddr_in); 499163953Srrs sin->sin_addr.s_addr = v4addr->addr; 500163953Srrs if (sin->sin_addr.s_addr == INADDR_ANY) 501163953Srrs zero_address = 1; 502169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 503169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 504163953Srrs break; 505163953Srrs case SCTP_IPV6_ADDRESS: 506163953Srrs if (param_length != sizeof(struct sctp_ipv6addr_param)) { 507163953Srrs /* invalid param size */ 508163953Srrs return NULL; 509163953Srrs } 510163953Srrs#ifdef INET6 511163953Srrs sin6 = (struct sockaddr_in6 *)&sa_store; 512163953Srrs bzero(sin6, sizeof(*sin6)); 513163953Srrs sin6->sin6_family = AF_INET6; 514163953Srrs sin6->sin6_len = sizeof(struct sockaddr_in6); 515163953Srrs memcpy((caddr_t)&sin6->sin6_addr, v6addr->addr, 516163953Srrs sizeof(struct in6_addr)); 517163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 518163953Srrs zero_address = 1; 519169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "process_asconf_set_primary: "); 520169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 521163953Srrs#else 522163953Srrs /* IPv6 not enabled! No "action" needed; just ack it */ 523169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 524169420Srrs "process_asconf_set_primary: v6 disabled- ignoring: "); 525169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 526163953Srrs /* just respond with a "success" ASCONF-ACK */ 527163953Srrs return NULL; 528169420Srrs#endif 529163953Srrs break; 530163953Srrs default: 531163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 532163953Srrs SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 533163953Srrs aparam_length); 534163953Srrs return m_reply; 535163953Srrs } 536163953Srrs 537163953Srrs /* if 0.0.0.0/::0, use the source address instead */ 538165647Srrs if (zero_address && sctp_nat_friendly) { 539163953Srrs sa = (struct sockaddr *)&sa_source; 540163953Srrs sctp_asconf_get_source_ip(m, sa); 541169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 542169420Srrs "process_asconf_set_primary: using source addr "); 543169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 544163953Srrs } 545163953Srrs /* set the primary address */ 546163953Srrs if (sctp_set_primary_addr(stcb, sa, NULL) == 0) { 547169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 548169420Srrs "process_asconf_set_primary: primary address set\n"); 549163953Srrs /* notify upper layer */ 550163953Srrs sctp_ulp_notify(SCTP_NOTIFY_ASCONF_SET_PRIMARY, stcb, 0, sa); 551163953Srrs 552163953Srrs if (response_required) { 553163953Srrs m_reply = sctp_asconf_success_response(aph->correlation_id); 554163953Srrs } 555163953Srrs } else { 556163953Srrs /* couldn't set the requested primary address! */ 557169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 558169420Srrs "process_asconf_set_primary: set primary failed!\n"); 559163953Srrs /* must have been an invalid address, so report */ 560163953Srrs m_reply = sctp_asconf_error_response(aph->correlation_id, 561163953Srrs SCTP_CAUSE_UNRESOLVABLE_ADDR, (uint8_t *) aph, 562163953Srrs aparam_length); 563163953Srrs } 564163953Srrs 565163953Srrs return m_reply; 566163953Srrs} 567163953Srrs 568163953Srrs/* 569163953Srrs * handles an ASCONF chunk. 570163953Srrs * if all parameters are processed ok, send a plain (empty) ASCONF-ACK 571163953Srrs */ 572163953Srrsvoid 573163953Srrssctp_handle_asconf(struct mbuf *m, unsigned int offset, 574163953Srrs struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb) 575163953Srrs{ 576163953Srrs struct sctp_association *asoc; 577163953Srrs uint32_t serial_num; 578163953Srrs struct mbuf *m_ack, *m_result, *m_tail; 579163953Srrs struct sctp_asconf_ack_chunk *ack_cp; 580163953Srrs struct sctp_asconf_paramhdr *aph, *ack_aph; 581163953Srrs struct sctp_ipv6addr_param *p_addr; 582163953Srrs unsigned int asconf_limit; 583163953Srrs int error = 0; /* did an error occur? */ 584163953Srrs 585163953Srrs /* asconf param buffer */ 586166675Srrs uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 587163953Srrs 588163953Srrs /* verify minimum length */ 589163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_chunk)) { 590169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 591169420Srrs "handle_asconf: chunk too small = %xh\n", 592169420Srrs ntohs(cp->ch.chunk_length)); 593163953Srrs return; 594163953Srrs } 595163953Srrs asoc = &stcb->asoc; 596163953Srrs serial_num = ntohl(cp->serial_number); 597163953Srrs 598163953Srrs if (serial_num == asoc->asconf_seq_in) { 599163953Srrs /* got a duplicate ASCONF */ 600169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 601169420Srrs "handle_asconf: got duplicate serial number = %xh\n", 602169420Srrs serial_num); 603163953Srrs /* resend last ASCONF-ACK... */ 604163953Srrs sctp_send_asconf_ack(stcb, 1); 605163953Srrs return; 606163953Srrs } else if (serial_num != (asoc->asconf_seq_in + 1)) { 607169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: incorrect serial number = %xh (expected next = %xh)\n", 608169420Srrs serial_num, asoc->asconf_seq_in + 1); 609163953Srrs return; 610163953Srrs } 611163953Srrs /* it's the expected "next" sequence number, so process it */ 612163953Srrs asoc->asconf_seq_in = serial_num; /* update sequence */ 613163953Srrs /* get length of all the param's in the ASCONF */ 614163953Srrs asconf_limit = offset + ntohs(cp->ch.chunk_length); 615169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 616169420Srrs "handle_asconf: asconf_limit=%u, sequence=%xh\n", 617169420Srrs asconf_limit, serial_num); 618163953Srrs if (asoc->last_asconf_ack_sent != NULL) { 619163953Srrs /* free last ASCONF-ACK message sent */ 620163953Srrs sctp_m_freem(asoc->last_asconf_ack_sent); 621163953Srrs asoc->last_asconf_ack_sent = NULL; 622163953Srrs } 623165647Srrs m_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_ack_chunk), 0, 624163953Srrs M_DONTWAIT, 1, MT_DATA); 625163953Srrs if (m_ack == NULL) { 626169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 627169420Srrs "handle_asconf: couldn't get mbuf!\n"); 628163953Srrs return; 629163953Srrs } 630163953Srrs m_tail = m_ack; /* current reply chain's tail */ 631163953Srrs 632163953Srrs /* fill in ASCONF-ACK header */ 633163953Srrs ack_cp = mtod(m_ack, struct sctp_asconf_ack_chunk *); 634163953Srrs ack_cp->ch.chunk_type = SCTP_ASCONF_ACK; 635163953Srrs ack_cp->ch.chunk_flags = 0; 636163953Srrs ack_cp->serial_number = htonl(serial_num); 637163953Srrs /* set initial lengths (eg. just an ASCONF-ACK), ntohx at the end! */ 638165647Srrs SCTP_BUF_LEN(m_ack) = sizeof(struct sctp_asconf_ack_chunk); 639163953Srrs ack_cp->ch.chunk_length = sizeof(struct sctp_asconf_ack_chunk); 640163953Srrs 641163953Srrs /* skip the lookup address parameter */ 642163953Srrs offset += sizeof(struct sctp_asconf_chunk); 643163953Srrs p_addr = (struct sctp_ipv6addr_param *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), (uint8_t *) & aparam_buf); 644163953Srrs if (p_addr == NULL) { 645169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 646169420Srrs "handle_asconf: couldn't get lookup addr!\n"); 647163953Srrs /* respond with a missing/invalid mandatory parameter error */ 648163953Srrs return; 649163953Srrs } 650163953Srrs /* param_length is already validated in process_control... */ 651163953Srrs offset += ntohs(p_addr->ph.param_length); /* skip lookup addr */ 652163953Srrs 653163953Srrs /* get pointer to first asconf param in ASCONF-ACK */ 654163953Srrs ack_aph = (struct sctp_asconf_paramhdr *)(mtod(m_ack, caddr_t)+sizeof(struct sctp_asconf_ack_chunk)); 655163953Srrs if (ack_aph == NULL) { 656169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "Gak in asconf2\n"); 657163953Srrs return; 658163953Srrs } 659163953Srrs /* get pointer to first asconf param in ASCONF */ 660163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_asconf_paramhdr), (uint8_t *) & aparam_buf); 661163953Srrs if (aph == NULL) { 662169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "Empty ASCONF received?\n"); 663163953Srrs goto send_reply; 664163953Srrs } 665163953Srrs /* process through all parameters */ 666163953Srrs while (aph != NULL) { 667163953Srrs unsigned int param_length, param_type; 668163953Srrs 669163953Srrs param_type = ntohs(aph->ph.param_type); 670163953Srrs param_length = ntohs(aph->ph.param_length); 671163953Srrs if (offset + param_length > asconf_limit) { 672163953Srrs /* parameter goes beyond end of chunk! */ 673163953Srrs sctp_m_freem(m_ack); 674163953Srrs return; 675163953Srrs } 676163953Srrs m_result = NULL; 677163953Srrs 678163953Srrs if (param_length > sizeof(aparam_buf)) { 679169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) larger than buffer size!\n", param_length); 680163953Srrs sctp_m_freem(m_ack); 681163953Srrs return; 682163953Srrs } 683163953Srrs if (param_length <= sizeof(struct sctp_paramhdr)) { 684169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: param length (%u) too short\n", param_length); 685163953Srrs sctp_m_freem(m_ack); 686163953Srrs } 687163953Srrs /* get the entire parameter */ 688163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 689163953Srrs if (aph == NULL) { 690169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: couldn't get entire param\n"); 691163953Srrs sctp_m_freem(m_ack); 692163953Srrs return; 693163953Srrs } 694163953Srrs switch (param_type) { 695163953Srrs case SCTP_ADD_IP_ADDRESS: 696163953Srrs asoc->peer_supports_asconf = 1; 697163953Srrs m_result = sctp_process_asconf_add_ip(m, aph, stcb, 698163953Srrs error); 699163953Srrs break; 700163953Srrs case SCTP_DEL_IP_ADDRESS: 701163953Srrs asoc->peer_supports_asconf = 1; 702163953Srrs m_result = sctp_process_asconf_delete_ip(m, aph, stcb, 703163953Srrs error); 704163953Srrs break; 705163953Srrs case SCTP_ERROR_CAUSE_IND: 706163953Srrs /* not valid in an ASCONF chunk */ 707163953Srrs break; 708163953Srrs case SCTP_SET_PRIM_ADDR: 709163953Srrs asoc->peer_supports_asconf = 1; 710163953Srrs m_result = sctp_process_asconf_set_primary(m, aph, 711163953Srrs stcb, error); 712163953Srrs break; 713163953Srrs case SCTP_SUCCESS_REPORT: 714163953Srrs /* not valid in an ASCONF chunk */ 715163953Srrs break; 716163953Srrs case SCTP_ULP_ADAPTATION: 717163953Srrs /* FIX */ 718163953Srrs break; 719163953Srrs default: 720163953Srrs if ((param_type & 0x8000) == 0) { 721163953Srrs /* Been told to STOP at this param */ 722163953Srrs asconf_limit = offset; 723163953Srrs /* 724163953Srrs * FIX FIX - We need to call 725163953Srrs * sctp_arethere_unrecognized_parameters() 726163953Srrs * to get a operr and send it for any 727163953Srrs * param's with the 0x4000 bit set OR do it 728163953Srrs * here ourselves... note we still must STOP 729163953Srrs * if the 0x8000 bit is clear. 730163953Srrs */ 731163953Srrs } 732163953Srrs /* unknown/invalid param type */ 733163953Srrs break; 734163953Srrs } /* switch */ 735163953Srrs 736163953Srrs /* add any (error) result to the reply mbuf chain */ 737163953Srrs if (m_result != NULL) { 738165647Srrs SCTP_BUF_NEXT(m_tail) = m_result; 739163953Srrs m_tail = m_result; 740163953Srrs /* update lengths, make sure it's aligned too */ 741165647Srrs SCTP_BUF_LEN(m_result) = SCTP_SIZE32(SCTP_BUF_LEN(m_result)); 742165647Srrs ack_cp->ch.chunk_length += SCTP_BUF_LEN(m_result); 743163953Srrs /* set flag to force success reports */ 744163953Srrs error = 1; 745163953Srrs } 746163953Srrs offset += SCTP_SIZE32(param_length); 747163953Srrs /* update remaining ASCONF message length to process */ 748163953Srrs if (offset >= asconf_limit) { 749163953Srrs /* no more data in the mbuf chain */ 750163953Srrs break; 751163953Srrs } 752163953Srrs /* get pointer to next asconf param */ 753163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 754163953Srrs sizeof(struct sctp_asconf_paramhdr), 755163953Srrs (uint8_t *) & aparam_buf); 756163953Srrs if (aph == NULL) { 757163953Srrs /* can't get an asconf paramhdr */ 758169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: can't get asconf param hdr!\n"); 759163953Srrs /* FIX ME - add error here... */ 760163953Srrs } 761169420Srrs } 762163953Srrs 763163953Srrssend_reply: 764163953Srrs ack_cp->ch.chunk_length = htons(ack_cp->ch.chunk_length); 765163953Srrs /* save the ASCONF-ACK reply */ 766163953Srrs asoc->last_asconf_ack_sent = m_ack; 767163953Srrs 768163953Srrs /* see if last_control_chunk_from is set properly (use IP src addr) */ 769163953Srrs if (stcb->asoc.last_control_chunk_from == NULL) { 770163953Srrs /* 771163953Srrs * this could happen if the source address was just newly 772163953Srrs * added 773163953Srrs */ 774163953Srrs struct ip *iph; 775163953Srrs struct sctphdr *sh; 776163953Srrs struct sockaddr_storage from_store; 777163953Srrs struct sockaddr *from = (struct sockaddr *)&from_store; 778163953Srrs 779169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: looking up net for IP source address\n"); 780163953Srrs /* pullup already done, IP options already stripped */ 781163953Srrs iph = mtod(m, struct ip *); 782163953Srrs sh = (struct sctphdr *)((caddr_t)iph + sizeof(*iph)); 783163953Srrs if (iph->ip_v == IPVERSION) { 784163953Srrs struct sockaddr_in *from4; 785163953Srrs 786163953Srrs from4 = (struct sockaddr_in *)&from_store; 787163953Srrs bzero(from4, sizeof(*from4)); 788163953Srrs from4->sin_family = AF_INET; 789163953Srrs from4->sin_len = sizeof(struct sockaddr_in); 790163953Srrs from4->sin_addr.s_addr = iph->ip_src.s_addr; 791163953Srrs from4->sin_port = sh->src_port; 792163953Srrs } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 793163953Srrs struct ip6_hdr *ip6; 794163953Srrs struct sockaddr_in6 *from6; 795163953Srrs 796163953Srrs ip6 = mtod(m, struct ip6_hdr *); 797163953Srrs from6 = (struct sockaddr_in6 *)&from_store; 798163953Srrs bzero(from6, sizeof(*from6)); 799163953Srrs from6->sin6_family = AF_INET6; 800163953Srrs from6->sin6_len = sizeof(struct sockaddr_in6); 801163953Srrs from6->sin6_addr = ip6->ip6_src; 802163953Srrs from6->sin6_port = sh->src_port; 803163953Srrs /* Get the scopes in properly to the sin6 addr's */ 804163953Srrs /* we probably don't need these operations */ 805163953Srrs (void)sa6_recoverscope(from6); 806163953Srrs sa6_embedscope(from6, ip6_use_defzone); 807163953Srrs } else { 808163953Srrs /* unknown address type */ 809163953Srrs from = NULL; 810163953Srrs } 811163953Srrs if (from != NULL) { 812169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "Looking for IP source: "); 813169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, from); 814163953Srrs /* look up the from address */ 815163953Srrs stcb->asoc.last_control_chunk_from = sctp_findnet(stcb, from); 816163953Srrs#ifdef SCTP_DEBUG 817169420Srrs if (stcb->asoc.last_control_chunk_from == NULL) 818169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf: IP source address not found?!\n"); 819169420Srrs#endif 820163953Srrs } 821163953Srrs } 822163953Srrs /* and send it (a new one) out... */ 823163953Srrs sctp_send_asconf_ack(stcb, 0); 824163953Srrs} 825163953Srrs 826163953Srrs/* 827163953Srrs * does the address match? returns 0 if not, 1 if so 828163953Srrs */ 829163953Srrsstatic uint32_t 830163953Srrssctp_asconf_addr_match(struct sctp_asconf_addr *aa, struct sockaddr *sa) 831163953Srrs{ 832163953Srrs#ifdef INET6 833163953Srrs if (sa->sa_family == AF_INET6) { 834163953Srrs /* IPv6 sa address */ 835163953Srrs /* XXX scopeid */ 836163953Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; 837163953Srrs 838163953Srrs if ((aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) && 839163953Srrs (memcmp(&aa->ap.addrp.addr, &sin6->sin6_addr, 840163953Srrs sizeof(struct in6_addr)) == 0)) { 841163953Srrs return (1); 842163953Srrs } 843163953Srrs } else 844163953Srrs#endif /* INET6 */ 845163953Srrs if (sa->sa_family == AF_INET) { 846163953Srrs /* IPv4 sa address */ 847163953Srrs struct sockaddr_in *sin = (struct sockaddr_in *)sa; 848163953Srrs 849163953Srrs if ((aa->ap.addrp.ph.param_type == SCTP_IPV4_ADDRESS) && 850163953Srrs (memcmp(&aa->ap.addrp.addr, &sin->sin_addr, 851163953Srrs sizeof(struct in_addr)) == 0)) { 852163953Srrs return (1); 853163953Srrs } 854163953Srrs } 855163953Srrs return (0); 856163953Srrs} 857163953Srrs 858163953Srrs/* 859163953Srrs * Cleanup for non-responded/OP ERR'd ASCONF 860163953Srrs */ 861163953Srrsvoid 862163953Srrssctp_asconf_cleanup(struct sctp_tcb *stcb, struct sctp_nets *net) 863163953Srrs{ 864163953Srrs /* mark peer as ASCONF incapable */ 865163953Srrs stcb->asoc.peer_supports_asconf = 0; 866163953Srrs /* 867163953Srrs * clear out any existing asconfs going out 868163953Srrs */ 869169655Srrs sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 870169655Srrs SCTP_FROM_SCTP_ASCONF + SCTP_LOC_2); 871163953Srrs stcb->asoc.asconf_seq_out++; 872163953Srrs /* remove the old ASCONF on our outbound queue */ 873163953Srrs sctp_toss_old_asconf(stcb); 874163953Srrs} 875163953Srrs 876163953Srrs/* 877163953Srrs * process an ADD/DELETE IP ack from peer. 878167598Srrs * addr corresponding sctp_ifa to the address being added/deleted. 879163953Srrs * type: SCTP_ADD_IP_ADDRESS or SCTP_DEL_IP_ADDRESS. 880163953Srrs * flag: 1=success, 0=failure. 881163953Srrs */ 882163953Srrsstatic void 883167598Srrssctp_asconf_addr_mgmt_ack(struct sctp_tcb *stcb, struct sctp_ifa *addr, 884163953Srrs uint16_t type, uint32_t flag) 885163953Srrs{ 886163953Srrs /* 887163953Srrs * do the necessary asoc list work- if we get a failure indication, 888163953Srrs * leave the address on the "do not use" asoc list if we get a 889163953Srrs * success indication, remove the address from the list 890163953Srrs */ 891163953Srrs /* 892163953Srrs * Note: this will only occur for ADD_IP_ADDRESS, since 893163953Srrs * DEL_IP_ADDRESS is never actually added to the list... 894163953Srrs */ 895163953Srrs if (flag) { 896163953Srrs /* success case, so remove from the list */ 897163953Srrs sctp_del_local_addr_assoc(stcb, addr); 898163953Srrs } 899163953Srrs /* else, leave it on the list */ 900163953Srrs} 901163953Srrs 902163953Srrs/* 903163953Srrs * add an asconf add/delete IP address parameter to the queue. 904163953Srrs * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 905163953Srrs * returns 0 if completed, non-zero if not completed. 906163953Srrs * NOTE: if adding, but delete already scheduled (and not yet sent out), 907163953Srrs * simply remove from queue. Same for deleting an address already scheduled 908163953Srrs * for add. If a duplicate operation is found, ignore the new one. 909163953Srrs */ 910163953Srrsstatic uint32_t 911167598Srrssctp_asconf_queue_add(struct sctp_tcb *stcb, struct sctp_ifa *ifa, uint16_t type) 912163953Srrs{ 913163953Srrs struct sctp_asconf_addr *aa, *aa_next; 914163953Srrs struct sockaddr *sa; 915163953Srrs 916163953Srrs /* see if peer supports ASCONF */ 917163953Srrs if (stcb->asoc.peer_supports_asconf == 0) { 918163953Srrs return (-1); 919163953Srrs } 920163953Srrs /* make sure the request isn't already in the queue */ 921163953Srrs for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 922163953Srrs aa = aa_next) { 923163953Srrs aa_next = TAILQ_NEXT(aa, next); 924163953Srrs /* address match? */ 925167598Srrs if (sctp_asconf_addr_match(aa, &ifa->address.sa) == 0) 926163953Srrs continue; 927163953Srrs /* is the request already in queue (sent or not) */ 928163953Srrs if (aa->ap.aph.ph.param_type == type) { 929163953Srrs return (-1); 930163953Srrs } 931163953Srrs /* is the negative request already in queue, and not sent */ 932163953Srrs if (aa->sent == 0 && 933163953Srrs /* add requested, delete already queued */ 934163953Srrs ((type == SCTP_ADD_IP_ADDRESS && 935163953Srrs aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) || 936163953Srrs /* delete requested, add already queued */ 937163953Srrs (type == SCTP_DEL_IP_ADDRESS && 938163953Srrs aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS))) { 939163953Srrs /* delete the existing entry in the queue */ 940163953Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 941163953Srrs /* take the entry off the appropriate list */ 942163953Srrs sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 943163953Srrs /* free the entry */ 944168299Srrs sctp_free_ifa(aa->ifa); 945170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 946163953Srrs return (-1); 947163953Srrs } 948163953Srrs } /* for each aa */ 949163953Srrs 950163953Srrs /* adding new request to the queue */ 951170091Srrs SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), SCTP_M_ASC_ADDR); 952163953Srrs if (aa == NULL) { 953163953Srrs /* didn't get memory */ 954169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 955169420Srrs "asconf_queue_add: failed to get memory!\n"); 956163953Srrs return (-1); 957163953Srrs } 958163953Srrs /* fill in asconf address parameter fields */ 959163953Srrs /* top level elements are "networked" during send */ 960163953Srrs aa->ap.aph.ph.param_type = type; 961163953Srrs aa->ifa = ifa; 962168299Srrs atomic_add_int(&ifa->refcount, 1); 963163953Srrs /* correlation_id filled in during send routine later... */ 964167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 965163953Srrs /* IPv6 address */ 966163953Srrs struct sockaddr_in6 *sin6; 967163953Srrs 968167598Srrs sin6 = (struct sockaddr_in6 *)&ifa->address.sa; 969163953Srrs sa = (struct sockaddr *)sin6; 970163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 971163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 972163953Srrs aa->ap.aph.ph.param_length = 973163953Srrs sizeof(struct sctp_asconf_paramhdr) + 974163953Srrs sizeof(struct sctp_ipv6addr_param); 975163953Srrs memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 976163953Srrs sizeof(struct in6_addr)); 977167598Srrs } else if (ifa->address.sa.sa_family == AF_INET) { 978163953Srrs /* IPv4 address */ 979167598Srrs struct sockaddr_in *sin = (struct sockaddr_in *)&ifa->address.sa; 980163953Srrs 981163953Srrs sa = (struct sockaddr *)sin; 982163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 983163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 984163953Srrs aa->ap.aph.ph.param_length = 985163953Srrs sizeof(struct sctp_asconf_paramhdr) + 986163953Srrs sizeof(struct sctp_ipv4addr_param); 987163953Srrs memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 988163953Srrs sizeof(struct in_addr)); 989163953Srrs } else { 990163953Srrs /* invalid family! */ 991170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 992163953Srrs return (-1); 993163953Srrs } 994163953Srrs aa->sent = 0; /* clear sent flag */ 995163953Srrs 996163953Srrs /* 997163953Srrs * if we are deleting an address it should go out last otherwise, 998163953Srrs * add it to front of the pending queue 999163953Srrs */ 1000163953Srrs if (type == SCTP_ADD_IP_ADDRESS) { 1001163953Srrs /* add goes to the front of the queue */ 1002163953Srrs TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1003169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, 1004169420Srrs "asconf_queue_add: appended asconf ADD_IP_ADDRESS: "); 1005169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1006163953Srrs } else { 1007163953Srrs /* delete and set primary goes to the back of the queue */ 1008163953Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1009163953Srrs#ifdef SCTP_DEBUG 1010169420Srrs if (sctp_debug_on && SCTP_DEBUG_ASCONF2) { 1011163953Srrs if (type == SCTP_DEL_IP_ADDRESS) { 1012169420Srrs SCTP_PRINTF("asconf_queue_add: inserted asconf DEL_IP_ADDRESS: "); 1013169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1014163953Srrs } else { 1015169420Srrs SCTP_PRINTF("asconf_queue_add: inserted asconf SET_PRIM_ADDR: "); 1016169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 1017163953Srrs } 1018163953Srrs } 1019169420Srrs#endif 1020163953Srrs } 1021163953Srrs 1022163953Srrs return (0); 1023163953Srrs} 1024163953Srrs 1025163953Srrs/* 1026163953Srrs * add an asconf add/delete IP address parameter to the queue by addr. 1027163953Srrs * type = SCTP_ADD_IP_ADDRESS, SCTP_DEL_IP_ADDRESS, SCTP_SET_PRIM_ADDR. 1028163953Srrs * returns 0 if completed, non-zero if not completed. 1029163953Srrs * NOTE: if adding, but delete already scheduled (and not yet sent out), 1030163953Srrs * simply remove from queue. Same for deleting an address already scheduled 1031163953Srrs * for add. If a duplicate operation is found, ignore the new one. 1032163953Srrs */ 1033163953Srrsstatic uint32_t 1034163953Srrssctp_asconf_queue_add_sa(struct sctp_tcb *stcb, struct sockaddr *sa, 1035163953Srrs uint16_t type) 1036163953Srrs{ 1037168299Srrs struct sctp_ifa *ifa; 1038163953Srrs struct sctp_asconf_addr *aa, *aa_next; 1039167598Srrs uint32_t vrf_id; 1040163953Srrs 1041169420Srrs if (stcb == NULL) { 1042169420Srrs return (-1); 1043169420Srrs } 1044163953Srrs /* see if peer supports ASCONF */ 1045163953Srrs if (stcb->asoc.peer_supports_asconf == 0) { 1046163953Srrs return (-1); 1047163953Srrs } 1048163953Srrs /* make sure the request isn't already in the queue */ 1049163953Srrs for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1050163953Srrs aa = aa_next) { 1051163953Srrs aa_next = TAILQ_NEXT(aa, next); 1052163953Srrs /* address match? */ 1053163953Srrs if (sctp_asconf_addr_match(aa, sa) == 0) 1054163953Srrs continue; 1055163953Srrs /* is the request already in queue (sent or not) */ 1056163953Srrs if (aa->ap.aph.ph.param_type == type) { 1057163953Srrs return (-1); 1058163953Srrs } 1059163953Srrs /* is the negative request already in queue, and not sent */ 1060163953Srrs if (aa->sent == 1) 1061163953Srrs continue; 1062163953Srrs if (type == SCTP_ADD_IP_ADDRESS && 1063163953Srrs aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 1064163953Srrs /* add requested, delete already queued */ 1065163953Srrs 1066163953Srrs /* delete the existing entry in the queue */ 1067163953Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1068163953Srrs /* free the entry */ 1069168299Srrs sctp_free_ifa(aa->ifa); 1070170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1071163953Srrs return (-1); 1072163953Srrs } else if (type == SCTP_DEL_IP_ADDRESS && 1073163953Srrs aa->ap.aph.ph.param_type == SCTP_ADD_IP_ADDRESS) { 1074163953Srrs /* delete requested, add already queued */ 1075163953Srrs 1076163953Srrs /* delete the existing entry in the queue */ 1077163953Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aa, next); 1078163953Srrs /* take the entry off the appropriate list */ 1079163953Srrs sctp_asconf_addr_mgmt_ack(stcb, aa->ifa, type, 1); 1080163953Srrs /* free the entry */ 1081168299Srrs sctp_free_ifa(aa->ifa); 1082170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1083163953Srrs return (-1); 1084163953Srrs } 1085163953Srrs } /* for each aa */ 1086168299Srrs if (stcb) { 1087168299Srrs vrf_id = stcb->asoc.vrf_id; 1088168299Srrs } else { 1089168299Srrs vrf_id = SCTP_DEFAULT_VRFID; 1090168299Srrs } 1091163953Srrs 1092168299Srrs ifa = sctp_find_ifa_by_addr(sa, vrf_id, 0); 1093168299Srrs if (ifa == NULL) { 1094168299Srrs /* Invalid address */ 1095168299Srrs return (-1); 1096168299Srrs } 1097163953Srrs /* adding new request to the queue */ 1098170091Srrs SCTP_MALLOC(aa, struct sctp_asconf_addr *, sizeof(*aa), SCTP_M_ASC_ADDR); 1099163953Srrs if (aa == NULL) { 1100163953Srrs /* didn't get memory */ 1101169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1102169420Srrs "asconf_queue_add_sa: failed to get memory!\n"); 1103163953Srrs return (-1); 1104163953Srrs } 1105163953Srrs /* fill in asconf address parameter fields */ 1106163953Srrs /* top level elements are "networked" during send */ 1107163953Srrs aa->ap.aph.ph.param_type = type; 1108168299Srrs aa->ifa = ifa; 1109168299Srrs atomic_add_int(&ifa->refcount, 1); 1110163953Srrs /* correlation_id filled in during send routine later... */ 1111163953Srrs if (sa->sa_family == AF_INET6) { 1112163953Srrs /* IPv6 address */ 1113163953Srrs struct sockaddr_in6 *sin6; 1114163953Srrs 1115163953Srrs sin6 = (struct sockaddr_in6 *)sa; 1116163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV6_ADDRESS; 1117163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv6addr_param)); 1118163953Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv6addr_param); 1119163953Srrs memcpy(&aa->ap.addrp.addr, &sin6->sin6_addr, 1120163953Srrs sizeof(struct in6_addr)); 1121163953Srrs } else if (sa->sa_family == AF_INET) { 1122163953Srrs /* IPv4 address */ 1123163953Srrs struct sockaddr_in *sin = (struct sockaddr_in *)sa; 1124163953Srrs 1125163953Srrs aa->ap.addrp.ph.param_type = SCTP_IPV4_ADDRESS; 1126163953Srrs aa->ap.addrp.ph.param_length = (sizeof(struct sctp_ipv4addr_param)); 1127163953Srrs aa->ap.aph.ph.param_length = sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_ipv4addr_param); 1128163953Srrs memcpy(&aa->ap.addrp.addr, &sin->sin_addr, 1129163953Srrs sizeof(struct in_addr)); 1130163953Srrs } else { 1131163953Srrs /* invalid family! */ 1132170091Srrs SCTP_FREE(aa, SCTP_M_ASC_ADDR); 1133163953Srrs return (-1); 1134163953Srrs } 1135163953Srrs aa->sent = 0; /* clear sent flag */ 1136163953Srrs 1137163953Srrs /* 1138163953Srrs * if we are deleting an address it should go out last otherwise, 1139163953Srrs * add it to front of the pending queue 1140163953Srrs */ 1141163953Srrs if (type == SCTP_ADD_IP_ADDRESS) { 1142163953Srrs /* add goes to the front of the queue */ 1143163953Srrs TAILQ_INSERT_HEAD(&stcb->asoc.asconf_queue, aa, next); 1144163953Srrs } else { 1145163953Srrs /* delete and set primary goes to the back of the queue */ 1146163953Srrs TAILQ_INSERT_TAIL(&stcb->asoc.asconf_queue, aa, next); 1147163953Srrs } 1148163953Srrs 1149163953Srrs return (0); 1150163953Srrs} 1151163953Srrs 1152163953Srrs/* 1153163953Srrs * find a specific asconf param on our "sent" queue 1154163953Srrs */ 1155163953Srrsstatic struct sctp_asconf_addr * 1156163953Srrssctp_asconf_find_param(struct sctp_tcb *stcb, uint32_t correlation_id) 1157163953Srrs{ 1158163953Srrs struct sctp_asconf_addr *aa; 1159163953Srrs 1160163953Srrs TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 1161163953Srrs if (aa->ap.aph.correlation_id == correlation_id && 1162163953Srrs aa->sent == 1) { 1163163953Srrs /* found it */ 1164163953Srrs return (aa); 1165163953Srrs } 1166163953Srrs } 1167163953Srrs /* didn't find it */ 1168163953Srrs return (NULL); 1169163953Srrs} 1170163953Srrs 1171163953Srrs/* 1172163953Srrs * process an SCTP_ERROR_CAUSE_IND for a ASCONF-ACK parameter and do 1173163953Srrs * notifications based on the error response 1174163953Srrs */ 1175163953Srrsstatic void 1176163953Srrssctp_asconf_process_error(struct sctp_tcb *stcb, 1177163953Srrs struct sctp_asconf_paramhdr *aph) 1178163953Srrs{ 1179163953Srrs struct sctp_error_cause *eh; 1180163953Srrs struct sctp_paramhdr *ph; 1181163953Srrs uint16_t param_type; 1182163953Srrs uint16_t error_code; 1183163953Srrs 1184163953Srrs eh = (struct sctp_error_cause *)(aph + 1); 1185163953Srrs ph = (struct sctp_paramhdr *)(eh + 1); 1186163953Srrs /* validate lengths */ 1187163953Srrs if (htons(eh->length) + sizeof(struct sctp_error_cause) > 1188163953Srrs htons(aph->ph.param_length)) { 1189163953Srrs /* invalid error cause length */ 1190169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1191169420Srrs "asconf_process_error: cause element too long\n"); 1192163953Srrs return; 1193163953Srrs } 1194163953Srrs if (htons(ph->param_length) + sizeof(struct sctp_paramhdr) > 1195163953Srrs htons(eh->length)) { 1196163953Srrs /* invalid included TLV length */ 1197169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1198169420Srrs "asconf_process_error: included TLV too long\n"); 1199163953Srrs return; 1200163953Srrs } 1201163953Srrs /* which error code ? */ 1202163953Srrs error_code = ntohs(eh->code); 1203163953Srrs param_type = ntohs(aph->ph.param_type); 1204163953Srrs /* FIX: this should go back up the REMOTE_ERROR ULP notify */ 1205163953Srrs switch (error_code) { 1206163953Srrs case SCTP_CAUSE_RESOURCE_SHORTAGE: 1207163953Srrs /* we allow ourselves to "try again" for this error */ 1208163953Srrs break; 1209163953Srrs default: 1210163953Srrs /* peer can't handle it... */ 1211163953Srrs switch (param_type) { 1212163953Srrs case SCTP_ADD_IP_ADDRESS: 1213163953Srrs case SCTP_DEL_IP_ADDRESS: 1214163953Srrs stcb->asoc.peer_supports_asconf = 0; 1215163953Srrs break; 1216163953Srrs case SCTP_SET_PRIM_ADDR: 1217163953Srrs stcb->asoc.peer_supports_asconf = 0; 1218163953Srrs break; 1219163953Srrs default: 1220163953Srrs break; 1221163953Srrs } 1222163953Srrs } 1223163953Srrs} 1224163953Srrs 1225163953Srrs/* 1226163953Srrs * process an asconf queue param aparam: parameter to process, will be 1227163953Srrs * removed from the queue flag: 1=success, 0=failure 1228163953Srrs */ 1229163953Srrsstatic void 1230163953Srrssctp_asconf_process_param_ack(struct sctp_tcb *stcb, 1231163953Srrs struct sctp_asconf_addr *aparam, uint32_t flag) 1232163953Srrs{ 1233163953Srrs uint16_t param_type; 1234163953Srrs 1235163953Srrs /* process this param */ 1236163953Srrs param_type = aparam->ap.aph.ph.param_type; 1237163953Srrs switch (param_type) { 1238163953Srrs case SCTP_ADD_IP_ADDRESS: 1239169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1240169420Srrs "process_param_ack: added IP address\n"); 1241163953Srrs sctp_asconf_addr_mgmt_ack(stcb, aparam->ifa, param_type, flag); 1242163953Srrs break; 1243163953Srrs case SCTP_DEL_IP_ADDRESS: 1244169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1245169420Srrs "process_param_ack: deleted IP address\n"); 1246163953Srrs /* nothing really to do... lists already updated */ 1247163953Srrs break; 1248163953Srrs case SCTP_SET_PRIM_ADDR: 1249163953Srrs /* nothing to do... peer may start using this addr */ 1250163953Srrs if (flag == 0) 1251163953Srrs stcb->asoc.peer_supports_asconf = 0; 1252163953Srrs break; 1253163953Srrs default: 1254163953Srrs /* should NEVER happen */ 1255163953Srrs break; 1256163953Srrs } 1257163953Srrs 1258163953Srrs /* remove the param and free it */ 1259163953Srrs TAILQ_REMOVE(&stcb->asoc.asconf_queue, aparam, next); 1260168299Srrs sctp_free_ifa(aparam->ifa); 1261170091Srrs SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 1262163953Srrs} 1263163953Srrs 1264163953Srrs/* 1265163953Srrs * cleanup from a bad asconf ack parameter 1266163953Srrs */ 1267163953Srrsstatic void 1268163953Srrssctp_asconf_ack_clear(struct sctp_tcb *stcb) 1269163953Srrs{ 1270163953Srrs /* assume peer doesn't really know how to do asconfs */ 1271163953Srrs stcb->asoc.peer_supports_asconf = 0; 1272163953Srrs /* XXX we could free the pending queue here */ 1273163953Srrs} 1274163953Srrs 1275163953Srrsvoid 1276163953Srrssctp_handle_asconf_ack(struct mbuf *m, int offset, 1277163953Srrs struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, 1278163953Srrs struct sctp_nets *net) 1279163953Srrs{ 1280163953Srrs struct sctp_association *asoc; 1281163953Srrs uint32_t serial_num; 1282163953Srrs uint16_t ack_length; 1283163953Srrs struct sctp_asconf_paramhdr *aph; 1284163953Srrs struct sctp_asconf_addr *aa, *aa_next; 1285163953Srrs uint32_t last_error_id = 0; /* last error correlation id */ 1286163953Srrs uint32_t id; 1287163953Srrs struct sctp_asconf_addr *ap; 1288163953Srrs 1289163953Srrs /* asconf param buffer */ 1290166675Srrs uint8_t aparam_buf[SCTP_PARAM_BUFFER_SIZE]; 1291163953Srrs 1292163953Srrs /* verify minimum length */ 1293163953Srrs if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_asconf_ack_chunk)) { 1294169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1295169420Srrs "handle_asconf_ack: chunk too small = %xh\n", 1296169420Srrs ntohs(cp->ch.chunk_length)); 1297163953Srrs return; 1298163953Srrs } 1299163953Srrs asoc = &stcb->asoc; 1300163953Srrs serial_num = ntohl(cp->serial_number); 1301163953Srrs 1302163953Srrs /* 1303163953Srrs * NOTE: we may want to handle this differently- currently, we will 1304163953Srrs * abort when we get an ack for the expected serial number + 1 (eg. 1305163953Srrs * we didn't send it), process an ack normally if it is the expected 1306163953Srrs * serial number, and re-send the previous ack for *ALL* other 1307163953Srrs * serial numbers 1308163953Srrs */ 1309163953Srrs 1310163953Srrs /* 1311163953Srrs * if the serial number is the next expected, but I didn't send it, 1312163953Srrs * abort the asoc, since someone probably just hijacked us... 1313163953Srrs */ 1314163953Srrs if (serial_num == (asoc->asconf_seq_out + 1)) { 1315169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got unexpected next serial number! Aborting asoc!\n"); 1316163953Srrs sctp_abort_an_association(stcb->sctp_ep, stcb, 1317163953Srrs SCTP_CAUSE_ILLEGAL_ASCONF_ACK, NULL); 1318163953Srrs return; 1319163953Srrs } 1320163953Srrs if (serial_num != asoc->asconf_seq_out) { 1321163953Srrs /* got a duplicate/unexpected ASCONF-ACK */ 1322169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got duplicate/unexpected serial number = %xh (expected = %xh)\n", 1323169420Srrs serial_num, asoc->asconf_seq_out); 1324163953Srrs return; 1325163953Srrs } 1326163953Srrs if (stcb->asoc.asconf_sent == 0) { 1327163953Srrs /* got a unexpected ASCONF-ACK for serial not in flight */ 1328169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "handle_asconf_ack: got serial number = %xh but not in flight\n", 1329169420Srrs serial_num); 1330163953Srrs /* nothing to do... duplicate ACK received */ 1331163953Srrs return; 1332163953Srrs } 1333163953Srrs /* stop our timer */ 1334169655Srrs sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, stcb, net, 1335169655Srrs SCTP_FROM_SCTP_ASCONF + SCTP_LOC_3); 1336163953Srrs 1337163953Srrs /* process the ASCONF-ACK contents */ 1338163953Srrs ack_length = ntohs(cp->ch.chunk_length) - 1339163953Srrs sizeof(struct sctp_asconf_ack_chunk); 1340163953Srrs offset += sizeof(struct sctp_asconf_ack_chunk); 1341163953Srrs /* process through all parameters */ 1342163953Srrs while (ack_length >= sizeof(struct sctp_asconf_paramhdr)) { 1343163953Srrs unsigned int param_length, param_type; 1344163953Srrs 1345163953Srrs /* get pointer to next asconf parameter */ 1346163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, 1347163953Srrs sizeof(struct sctp_asconf_paramhdr), aparam_buf); 1348163953Srrs if (aph == NULL) { 1349163953Srrs /* can't get an asconf paramhdr */ 1350163953Srrs sctp_asconf_ack_clear(stcb); 1351163953Srrs return; 1352163953Srrs } 1353163953Srrs param_type = ntohs(aph->ph.param_type); 1354163953Srrs param_length = ntohs(aph->ph.param_length); 1355163953Srrs if (param_length > ack_length) { 1356163953Srrs sctp_asconf_ack_clear(stcb); 1357163953Srrs return; 1358163953Srrs } 1359163953Srrs if (param_length < sizeof(struct sctp_paramhdr)) { 1360163953Srrs sctp_asconf_ack_clear(stcb); 1361163953Srrs return; 1362163953Srrs } 1363163953Srrs /* get the complete parameter... */ 1364163953Srrs if (param_length > sizeof(aparam_buf)) { 1365169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1366169420Srrs "param length (%u) larger than buffer size!\n", param_length); 1367163953Srrs sctp_asconf_ack_clear(stcb); 1368163953Srrs return; 1369163953Srrs } 1370163953Srrs aph = (struct sctp_asconf_paramhdr *)sctp_m_getptr(m, offset, param_length, aparam_buf); 1371163953Srrs if (aph == NULL) { 1372163953Srrs sctp_asconf_ack_clear(stcb); 1373163953Srrs return; 1374163953Srrs } 1375163953Srrs /* correlation_id is transparent to peer, no ntohl needed */ 1376163953Srrs id = aph->correlation_id; 1377163953Srrs 1378163953Srrs switch (param_type) { 1379163953Srrs case SCTP_ERROR_CAUSE_IND: 1380163953Srrs last_error_id = id; 1381163953Srrs /* find the corresponding asconf param in our queue */ 1382163953Srrs ap = sctp_asconf_find_param(stcb, id); 1383163953Srrs if (ap == NULL) { 1384163953Srrs /* hmm... can't find this in our queue! */ 1385163953Srrs break; 1386163953Srrs } 1387163953Srrs /* process the parameter, failed flag */ 1388163953Srrs sctp_asconf_process_param_ack(stcb, ap, 0); 1389163953Srrs /* process the error response */ 1390163953Srrs sctp_asconf_process_error(stcb, aph); 1391163953Srrs break; 1392163953Srrs case SCTP_SUCCESS_REPORT: 1393163953Srrs /* find the corresponding asconf param in our queue */ 1394163953Srrs ap = sctp_asconf_find_param(stcb, id); 1395163953Srrs if (ap == NULL) { 1396163953Srrs /* hmm... can't find this in our queue! */ 1397163953Srrs break; 1398163953Srrs } 1399163953Srrs /* process the parameter, success flag */ 1400163953Srrs sctp_asconf_process_param_ack(stcb, ap, 1); 1401163953Srrs break; 1402163953Srrs default: 1403163953Srrs break; 1404163953Srrs } /* switch */ 1405163953Srrs 1406163953Srrs /* update remaining ASCONF-ACK message length to process */ 1407163953Srrs ack_length -= SCTP_SIZE32(param_length); 1408163953Srrs if (ack_length <= 0) { 1409163953Srrs /* no more data in the mbuf chain */ 1410163953Srrs break; 1411163953Srrs } 1412163953Srrs offset += SCTP_SIZE32(param_length); 1413163953Srrs } /* while */ 1414163953Srrs 1415163953Srrs /* 1416163953Srrs * if there are any "sent" params still on the queue, these are 1417163953Srrs * implicitly "success", or "failed" (if we got an error back) ... 1418163953Srrs * so process these appropriately 1419163953Srrs * 1420163953Srrs * we assume that the correlation_id's are monotonically increasing 1421163953Srrs * beginning from 1 and that we don't have *that* many outstanding 1422163953Srrs * at any given time 1423163953Srrs */ 1424163953Srrs if (last_error_id == 0) 1425163953Srrs last_error_id--;/* set to "max" value */ 1426163953Srrs for (aa = TAILQ_FIRST(&stcb->asoc.asconf_queue); aa != NULL; 1427163953Srrs aa = aa_next) { 1428163953Srrs aa_next = TAILQ_NEXT(aa, next); 1429163953Srrs if (aa->sent == 1) { 1430163953Srrs /* 1431163953Srrs * implicitly successful or failed if correlation_id 1432163953Srrs * < last_error_id, then success else, failure 1433163953Srrs */ 1434163953Srrs if (aa->ap.aph.correlation_id < last_error_id) 1435163953Srrs sctp_asconf_process_param_ack(stcb, aa, 1436163953Srrs SCTP_SUCCESS_REPORT); 1437163953Srrs else 1438163953Srrs sctp_asconf_process_param_ack(stcb, aa, 1439163953Srrs SCTP_ERROR_CAUSE_IND); 1440163953Srrs } else { 1441163953Srrs /* 1442163953Srrs * since we always process in order (FIFO queue) if 1443163953Srrs * we reach one that hasn't been sent, the rest 1444163953Srrs * should not have been sent either. so, we're 1445163953Srrs * done... 1446163953Srrs */ 1447163953Srrs break; 1448163953Srrs } 1449163953Srrs } 1450163953Srrs 1451163953Srrs /* update the next sequence number to use */ 1452163953Srrs asoc->asconf_seq_out++; 1453163953Srrs /* remove the old ASCONF on our outbound queue */ 1454163953Srrs sctp_toss_old_asconf(stcb); 1455163953Srrs /* clear the sent flag to allow new ASCONFs */ 1456163953Srrs asoc->asconf_sent = 0; 1457163953Srrs if (!TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 1458163953Srrs /* we have more params, so restart our timer */ 1459163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, stcb->sctp_ep, 1460163953Srrs stcb, net); 1461163953Srrs } 1462163953Srrs} 1463163953Srrs 1464163953Srrsstatic uint32_t 1465163953Srrssctp_is_scopeid_in_nets(struct sctp_tcb *stcb, struct sockaddr *sa) 1466163953Srrs{ 1467163953Srrs struct sockaddr_in6 *sin6, *net6; 1468163953Srrs struct sctp_nets *net; 1469163953Srrs 1470163953Srrs if (sa->sa_family != AF_INET6) { 1471163953Srrs /* wrong family */ 1472163953Srrs return (0); 1473163953Srrs } 1474163953Srrs sin6 = (struct sockaddr_in6 *)sa; 1475163953Srrs if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) == 0) { 1476163953Srrs /* not link local address */ 1477163953Srrs return (0); 1478163953Srrs } 1479163953Srrs /* hunt through our destination nets list for this scope_id */ 1480163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1481163953Srrs if (((struct sockaddr *)(&net->ro._l_addr))->sa_family != 1482163953Srrs AF_INET6) 1483163953Srrs continue; 1484163953Srrs net6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1485163953Srrs if (IN6_IS_ADDR_LINKLOCAL(&net6->sin6_addr) == 0) 1486163953Srrs continue; 1487163953Srrs if (sctp_is_same_scope(sin6, net6)) { 1488163953Srrs /* found one */ 1489163953Srrs return (1); 1490163953Srrs } 1491163953Srrs } 1492163953Srrs /* didn't find one */ 1493163953Srrs return (0); 1494163953Srrs} 1495163953Srrs 1496163953Srrs/* 1497163953Srrs * address management functions 1498163953Srrs */ 1499163953Srrsstatic void 1500163953Srrssctp_addr_mgmt_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1501167598Srrs struct sctp_ifa *ifa, uint16_t type) 1502163953Srrs{ 1503163953Srrs int status; 1504163953Srrs 1505163953Srrs 1506163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0 && 1507163953Srrs sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1508163953Srrs /* subset bound, no ASCONF allowed case, so ignore */ 1509163953Srrs return; 1510163953Srrs } 1511163953Srrs /* 1512163953Srrs * note: we know this is not the subset bound, no ASCONF case eg. 1513163953Srrs * this is boundall or subset bound w/ASCONF allowed 1514163953Srrs */ 1515163953Srrs 1516163953Srrs /* first, make sure it's a good address family */ 1517167598Srrs if (ifa->address.sa.sa_family != AF_INET6 && 1518167598Srrs ifa->address.sa.sa_family != AF_INET) { 1519163953Srrs return; 1520163953Srrs } 1521163953Srrs /* make sure we're "allowed" to add this type of addr */ 1522167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 1523163953Srrs /* invalid if we're not a v6 endpoint */ 1524163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) 1525163953Srrs return; 1526163953Srrs /* is the v6 addr really valid ? */ 1527167598Srrs if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1528163953Srrs return; 1529163953Srrs } 1530163953Srrs } 1531163953Srrs /* put this address on the "pending/do not use yet" list */ 1532163953Srrs /* 1533163953Srrs * Note: we do this primarily for the subset bind case We don't have 1534163953Srrs * scoping flags at the EP level, so we must add link local/site 1535163953Srrs * local addresses to the EP, then need to "negate" them here. 1536163953Srrs * Recall that this routine is only called for the subset bound 1537163953Srrs * w/ASCONF allowed case. 1538163953Srrs */ 1539167598Srrs sctp_add_local_addr_assoc(stcb, ifa, 1); 1540163953Srrs /* 1541163953Srrs * check address scope if address is out of scope, don't queue 1542163953Srrs * anything... note: this would leave the address on both inp and 1543163953Srrs * asoc lists 1544163953Srrs */ 1545167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 1546163953Srrs struct sockaddr_in6 *sin6; 1547163953Srrs 1548167598Srrs sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1549163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1550163953Srrs /* we skip unspecifed addresses */ 1551163953Srrs return; 1552163953Srrs } 1553163953Srrs if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1554163953Srrs if (stcb->asoc.local_scope == 0) { 1555163953Srrs return; 1556163953Srrs } 1557163953Srrs /* is it the right link local scope? */ 1558167598Srrs if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1559163953Srrs return; 1560163953Srrs } 1561163953Srrs } 1562163953Srrs if (stcb->asoc.site_scope == 0 && 1563163953Srrs IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 1564163953Srrs return; 1565163953Srrs } 1566167598Srrs } else if (ifa->address.sa.sa_family == AF_INET) { 1567163953Srrs struct sockaddr_in *sin; 1568163953Srrs struct in6pcb *inp6; 1569163953Srrs 1570163953Srrs inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1571163953Srrs /* invalid if we are a v6 only endpoint */ 1572163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1573166023Srrs SCTP_IPV6_V6ONLY(inp6)) 1574163953Srrs return; 1575163953Srrs 1576167598Srrs sin = (struct sockaddr_in *)&ifa->address.sa; 1577163953Srrs if (sin->sin_addr.s_addr == 0) { 1578163953Srrs /* we skip unspecifed addresses */ 1579163953Srrs return; 1580163953Srrs } 1581163953Srrs if (stcb->asoc.ipv4_local_scope == 0 && 1582163953Srrs IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1583163953Srrs return; 1584163953Srrs } 1585163953Srrs } else { 1586163953Srrs /* else, not AF_INET or AF_INET6, so skip */ 1587163953Srrs return; 1588163953Srrs } 1589163953Srrs 1590163953Srrs /* queue an asconf for this address add/delete */ 1591163953Srrs if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1592163953Srrs /* does the peer do asconf? */ 1593163953Srrs if (stcb->asoc.peer_supports_asconf) { 1594163953Srrs /* queue an asconf for this addr */ 1595163953Srrs status = sctp_asconf_queue_add(stcb, ifa, type); 1596163953Srrs /* 1597163953Srrs * if queued ok, and in correct state, set the 1598163953Srrs * ASCONF timer if in non-open state, we will set 1599163953Srrs * this timer when the state does go open and do all 1600163953Srrs * the asconf's 1601163953Srrs */ 1602163953Srrs if (status == 0 && 1603163953Srrs SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1604163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1605163953Srrs stcb, stcb->asoc.primary_destination); 1606163953Srrs } 1607163953Srrs } 1608163953Srrs } 1609163953Srrs} 1610163953Srrs 1611167598Srrs 1612167598Srrsint 1613167598Srrssctp_iterator_ep(struct sctp_inpcb *inp, void *ptr, uint32_t val) 1614163953Srrs{ 1615167598Srrs struct sctp_asconf_iterator *asc; 1616167598Srrs struct sctp_ifa *ifa; 1617167598Srrs struct sctp_laddr *l; 1618167598Srrs int type; 1619167598Srrs int cnt_invalid = 0; 1620163953Srrs 1621167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 1622167598Srrs LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 1623167598Srrs ifa = l->ifa; 1624167598Srrs type = l->action; 1625167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 1626167598Srrs /* invalid if we're not a v6 endpoint */ 1627167598Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1628167598Srrs cnt_invalid++; 1629167598Srrs if (asc->cnt == cnt_invalid) 1630167598Srrs return (1); 1631167598Srrs else 1632167598Srrs continue; 1633167598Srrs } 1634167598Srrs } else if (ifa->address.sa.sa_family == AF_INET) { 1635167598Srrs /* invalid if we are a v6 only endpoint */ 1636167598Srrs struct in6pcb *inp6; 1637163953Srrs 1638167598Srrs inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1639167598Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1640167598Srrs SCTP_IPV6_V6ONLY(inp6)) { 1641167598Srrs cnt_invalid++; 1642167598Srrs if (asc->cnt == cnt_invalid) 1643167598Srrs return (1); 1644167598Srrs else 1645167598Srrs continue; 1646163953Srrs } 1647163953Srrs } else { 1648167598Srrs /* invalid address family */ 1649167598Srrs cnt_invalid++; 1650167598Srrs if (asc->cnt == cnt_invalid) 1651167598Srrs return (1); 1652167598Srrs else 1653167598Srrs continue; 1654163953Srrs } 1655163953Srrs } 1656167598Srrs return (0); 1657163953Srrs} 1658163953Srrs 1659167598Srrsint 1660167598Srrssctp_iterator_ep_end(struct sctp_inpcb *inp, void *ptr, uint32_t val) 1661163953Srrs{ 1662167598Srrs struct sctp_ifa *ifa; 1663167598Srrs struct sctp_asconf_iterator *asc; 1664167598Srrs struct sctp_laddr *laddr, *nladdr, *l; 1665163953Srrs 1666167598Srrs /* Only for specific case not bound all */ 1667167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 1668167598Srrs LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 1669167598Srrs ifa = l->ifa; 1670167598Srrs if (l->action == SCTP_ADD_IP_ADDRESS) { 1671169655Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, 1672169655Srrs sctp_nxt_addr) { 1673167598Srrs if (laddr->ifa == ifa) { 1674167598Srrs laddr->action = 0; 1675167598Srrs break; 1676167598Srrs } 1677167598Srrs } 1678167598Srrs } else if (l->action == SCTP_DEL_IP_ADDRESS) { 1679167598Srrs laddr = LIST_FIRST(&inp->sctp_addr_list); 1680167598Srrs while (laddr) { 1681167598Srrs nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 1682167598Srrs /* remove only after all guys are done */ 1683167598Srrs if (laddr->ifa == ifa) { 1684167598Srrs sctp_del_local_addr_ep(inp, ifa); 1685167598Srrs } 1686167598Srrs laddr = nladdr; 1687167598Srrs } 1688167598Srrs } 1689163953Srrs } 1690167598Srrs return (0); 1691163953Srrs} 1692163953Srrs 1693167598Srrsvoid 1694167598Srrssctp_iterator_stcb(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, 1695167598Srrs uint32_t val) 1696163953Srrs{ 1697167598Srrs struct sctp_asconf_iterator *asc; 1698167598Srrs struct sctp_ifa *ifa; 1699167598Srrs struct sctp_laddr *l; 1700167598Srrs int cnt_invalid = 0; 1701167598Srrs int type, status; 1702163953Srrs 1703167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 1704167598Srrs LIST_FOREACH(l, &asc->list_of_work, sctp_nxt_addr) { 1705167598Srrs ifa = l->ifa; 1706167598Srrs type = l->action; 1707167598Srrs /* Same checks again for assoc */ 1708167598Srrs if (ifa->address.sa.sa_family == AF_INET6) { 1709167598Srrs /* invalid if we're not a v6 endpoint */ 1710167598Srrs struct sockaddr_in6 *sin6; 1711163953Srrs 1712167598Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1713167598Srrs cnt_invalid++; 1714167598Srrs if (asc->cnt == cnt_invalid) 1715167598Srrs return; 1716167598Srrs else 1717167598Srrs continue; 1718167598Srrs } 1719167598Srrs sin6 = (struct sockaddr_in6 *)&ifa->address.sin6; 1720167598Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1721167598Srrs /* we skip unspecifed addresses */ 1722167598Srrs continue; 1723167598Srrs } 1724167598Srrs if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1725167598Srrs if (stcb->asoc.local_scope == 0) { 1726167598Srrs continue; 1727167598Srrs } 1728167598Srrs /* is it the right link local scope? */ 1729167598Srrs if (sctp_is_scopeid_in_nets(stcb, &ifa->address.sa) == 0) { 1730167598Srrs continue; 1731167598Srrs } 1732167598Srrs } 1733167598Srrs } else if (ifa->address.sa.sa_family == AF_INET) { 1734167598Srrs /* invalid if we are a v6 only endpoint */ 1735167598Srrs struct in6pcb *inp6; 1736167598Srrs struct sockaddr_in *sin; 1737163953Srrs 1738167598Srrs inp6 = (struct in6pcb *)&inp->ip_inp.inp; 1739167598Srrs /* invalid if we are a v6 only endpoint */ 1740167598Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1741167598Srrs SCTP_IPV6_V6ONLY(inp6)) 1742167598Srrs continue; 1743167598Srrs 1744167598Srrs sin = (struct sockaddr_in *)&ifa->address.sa; 1745167598Srrs if (sin->sin_addr.s_addr == 0) { 1746167598Srrs /* we skip unspecifed addresses */ 1747167598Srrs continue; 1748167598Srrs } 1749167598Srrs if (stcb->asoc.ipv4_local_scope == 0 && 1750167598Srrs IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1751167598Srrs continue;; 1752167598Srrs } 1753167598Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1754167598Srrs SCTP_IPV6_V6ONLY(inp6)) { 1755167598Srrs cnt_invalid++; 1756167598Srrs if (asc->cnt == cnt_invalid) 1757167598Srrs return; 1758167598Srrs else 1759167598Srrs continue; 1760167598Srrs } 1761163953Srrs } else { 1762167598Srrs /* invalid address family */ 1763167598Srrs cnt_invalid++; 1764167598Srrs if (asc->cnt == cnt_invalid) 1765163953Srrs return; 1766167598Srrs else 1767167598Srrs continue; 1768163953Srrs } 1769163953Srrs 1770167598Srrs /* put this address on the "pending/do not use yet" list */ 1771167598Srrs if (type == SCTP_ADD_IP_ADDRESS) { 1772167598Srrs sctp_add_local_addr_assoc(stcb, ifa, 1); 1773167598Srrs } else if (type == SCTP_DEL_IP_ADDRESS) { 1774163953Srrs struct sctp_nets *net; 1775163953Srrs 1776163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1777169352Srrs sctp_rtentry_t *rt; 1778163953Srrs 1779163953Srrs /* delete this address if cached */ 1780167598Srrs if (net->ro._s_addr && 1781167598Srrs (net->ro._s_addr->ifa == ifa)) { 1782167598Srrs sctp_free_ifa(net->ro._s_addr); 1783167598Srrs net->ro._s_addr = NULL; 1784167598Srrs net->src_addr_selected = 0; 1785167598Srrs rt = net->ro.ro_rt; 1786167598Srrs if (rt) { 1787167598Srrs RTFREE(rt); 1788167598Srrs net->ro.ro_rt = NULL; 1789167598Srrs } 1790167598Srrs /* 1791167598Srrs * Now we deleted our src address, 1792167598Srrs * should we not also now reset the 1793167598Srrs * cwnd/rto to start as if its a new 1794167598Srrs * address? 1795167598Srrs */ 1796167598Srrs sctp_set_initial_cc_param(stcb, net); 1797167598Srrs net->RTO = stcb->asoc.initial_rto; 1798167598Srrs 1799163953Srrs } 1800167598Srrs } 1801167598Srrs } else if (type == SCTP_SET_PRIM_ADDR) { 1802167598Srrs if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1803167598Srrs /* 1804167598Srrs * must validate the ifa in question is in 1805167598Srrs * the ep 1806167598Srrs */ 1807167598Srrs if (sctp_is_addr_in_ep(stcb->sctp_ep, ifa) == 0) { 1808167598Srrs continue; 1809163953Srrs } 1810167598Srrs } else { 1811167598Srrs /* Need to check scopes for this guy */ 1812167598Srrs if (sctp_is_address_in_scope(ifa, 1813167598Srrs stcb->asoc.ipv4_addr_legal, 1814167598Srrs stcb->asoc.ipv6_addr_legal, 1815167598Srrs stcb->asoc.loopback_scope, 1816167598Srrs stcb->asoc.ipv4_local_scope, 1817167598Srrs stcb->asoc.local_scope, 1818167598Srrs stcb->asoc.site_scope, 0) == 0) { 1819167598Srrs continue; 1820167598Srrs } 1821163953Srrs } 1822167598Srrs 1823163953Srrs } 1824167598Srrs /* queue an asconf for this address add/delete */ 1825167598Srrs if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 1826167598Srrs /* does the peer do asconf? */ 1827167598Srrs if (stcb->asoc.peer_supports_asconf) { 1828167598Srrs /* queue an asconf for this addr */ 1829167598Srrs status = sctp_asconf_queue_add(stcb, ifa, type); 1830167598Srrs /* 1831167598Srrs * if queued ok, and in correct state, set 1832167598Srrs * the ASCONF timer if in non-open state, we 1833167598Srrs * will set this timer when the state does 1834167598Srrs * go open and do all the asconf's 1835167598Srrs */ 1836167598Srrs if (status == 0 && 1837167598Srrs SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1838167598Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 1839167598Srrs stcb, stcb->asoc.primary_destination); 1840167598Srrs } 1841167598Srrs } 1842167598Srrs } 1843163953Srrs } 1844163953Srrs} 1845163953Srrs 1846167598Srrsvoid 1847167598Srrssctp_iterator_end(void *ptr, uint32_t val) 1848167598Srrs{ 1849167598Srrs struct sctp_asconf_iterator *asc; 1850167598Srrs struct sctp_ifa *ifa; 1851167598Srrs struct sctp_laddr *l, *l_next; 1852167598Srrs 1853167598Srrs asc = (struct sctp_asconf_iterator *)ptr; 1854167598Srrs l = LIST_FIRST(&asc->list_of_work); 1855167598Srrs while (l != NULL) { 1856167598Srrs l_next = LIST_NEXT(l, sctp_nxt_addr); 1857167598Srrs ifa = l->ifa; 1858167598Srrs if (l->action == SCTP_ADD_IP_ADDRESS) { 1859167598Srrs /* Clear the defer use flag */ 1860167598Srrs ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 1861167598Srrs } 1862167598Srrs sctp_free_ifa(ifa); 1863167598Srrs SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, l); 1864167598Srrs SCTP_DECR_LADDR_COUNT(); 1865167598Srrs l = l_next; 1866167598Srrs } 1867170091Srrs SCTP_FREE(asc, SCTP_M_ASC_IT); 1868167598Srrs} 1869167598Srrs 1870163953Srrs/* 1871163953Srrs * sa is the sockaddr to ask the peer to set primary to returns: 0 = 1872163953Srrs * completed, -1 = error 1873163953Srrs */ 1874163953Srrsint32_t 1875163953Srrssctp_set_primary_ip_address_sa(struct sctp_tcb *stcb, struct sockaddr *sa) 1876163953Srrs{ 1877163953Srrs /* NOTE: we currently don't check the validity of the address! */ 1878163953Srrs 1879163953Srrs /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 1880163953Srrs if (!sctp_asconf_queue_add_sa(stcb, sa, SCTP_SET_PRIM_ADDR)) { 1881163953Srrs /* set primary queuing succeeded */ 1882163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 1883163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 1884163953Srrs stcb->sctp_ep, stcb, 1885163953Srrs stcb->asoc.primary_destination); 1886163953Srrs } 1887169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 1888169420Srrs "set_primary_ip_address_sa: queued on tcb=%p, ", 1889169420Srrs stcb); 1890169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 1891163953Srrs } else { 1892169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address_sa: failed to add to queue on tcb=%p, ", 1893169420Srrs stcb); 1894169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, sa); 1895163953Srrs return (-1); 1896163953Srrs } 1897163953Srrs return (0); 1898163953Srrs} 1899163953Srrs 1900163953Srrsvoid 1901167598Srrssctp_set_primary_ip_address(struct sctp_ifa *ifa) 1902163953Srrs{ 1903163953Srrs struct sctp_inpcb *inp; 1904163953Srrs 1905163953Srrs /* go through all our PCB's */ 1906163953Srrs LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 1907163953Srrs struct sctp_tcb *stcb; 1908163953Srrs 1909163953Srrs /* process for all associations for this endpoint */ 1910163953Srrs LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 1911163953Srrs /* queue an ASCONF:SET_PRIM_ADDR to be sent */ 1912163953Srrs if (!sctp_asconf_queue_add(stcb, ifa, 1913163953Srrs SCTP_SET_PRIM_ADDR)) { 1914163953Srrs /* set primary queuing succeeded */ 1915163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == 1916163953Srrs SCTP_STATE_OPEN) { 1917163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 1918163953Srrs stcb->sctp_ep, stcb, 1919163953Srrs stcb->asoc.primary_destination); 1920163953Srrs } 1921169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "set_primary_ip_address: queued on stcb=%p, ", 1922169420Srrs stcb); 1923169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &ifa->address.sa); 1924163953Srrs } 1925163953Srrs } /* for each stcb */ 1926163953Srrs } /* for each inp */ 1927163953Srrs} 1928163953Srrs 1929163953Srrsstatic struct sockaddr * 1930163953Srrssctp_find_valid_localaddr(struct sctp_tcb *stcb) 1931163953Srrs{ 1932167598Srrs struct sctp_vrf *vrf = NULL; 1933167598Srrs struct sctp_ifn *sctp_ifn; 1934167598Srrs struct sctp_ifa *sctp_ifa; 1935163953Srrs 1936167598Srrs vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1937169420Srrs if (vrf == NULL) { 1938169420Srrs return (NULL); 1939169420Srrs } 1940167598Srrs LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1941167598Srrs if (stcb->asoc.loopback_scope == 0 && 1942167598Srrs SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1943163953Srrs /* Skip if loopback_scope not set */ 1944163953Srrs continue; 1945163953Srrs } 1946167598Srrs LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1947167598Srrs if (sctp_ifa->address.sa.sa_family == AF_INET && 1948163953Srrs stcb->asoc.ipv4_addr_legal) { 1949163953Srrs struct sockaddr_in *sin; 1950163953Srrs 1951167598Srrs sin = (struct sockaddr_in *)&sctp_ifa->address.sa; 1952163953Srrs if (sin->sin_addr.s_addr == 0) { 1953163953Srrs /* skip unspecifed addresses */ 1954163953Srrs continue; 1955163953Srrs } 1956163953Srrs if (stcb->asoc.ipv4_local_scope == 0 && 1957163953Srrs IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) 1958163953Srrs continue; 1959163953Srrs 1960167598Srrs if (sctp_is_addr_restricted(stcb, sctp_ifa)) 1961163953Srrs continue; 1962163953Srrs /* found a valid local v4 address to use */ 1963167598Srrs return (&sctp_ifa->address.sa); 1964167598Srrs } else if (sctp_ifa->address.sa.sa_family == AF_INET6 && 1965163953Srrs stcb->asoc.ipv6_addr_legal) { 1966163953Srrs struct sockaddr_in6 *sin6; 1967163953Srrs 1968167598Srrs if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1969163953Srrs continue; 1970167598Srrs } 1971167598Srrs sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa; 1972163953Srrs if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1973163953Srrs /* we skip unspecifed addresses */ 1974163953Srrs continue; 1975163953Srrs } 1976163953Srrs if (stcb->asoc.local_scope == 0 && 1977163953Srrs IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 1978163953Srrs continue; 1979163953Srrs if (stcb->asoc.site_scope == 0 && 1980163953Srrs IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 1981163953Srrs continue; 1982163953Srrs 1983163953Srrs /* found a valid local v6 address to use */ 1984167598Srrs return (&sctp_ifa->address.sa); 1985163953Srrs } 1986163953Srrs } 1987163953Srrs } 1988163953Srrs /* no valid addresses found */ 1989163953Srrs return (NULL); 1990163953Srrs} 1991163953Srrs 1992163953Srrsstatic struct sockaddr * 1993163953Srrssctp_find_valid_localaddr_ep(struct sctp_tcb *stcb) 1994163953Srrs{ 1995163953Srrs struct sctp_laddr *laddr; 1996163953Srrs 1997163953Srrs LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1998163953Srrs if (laddr->ifa == NULL) { 1999163953Srrs continue; 2000163953Srrs } 2001167598Srrs if (laddr->ifa == NULL) { 2002163953Srrs continue; 2003163953Srrs } 2004163953Srrs /* is the address restricted ? */ 2005167598Srrs if (sctp_is_addr_restricted(stcb, laddr->ifa)) 2006163953Srrs continue; 2007163953Srrs 2008163953Srrs /* found a valid local address to use */ 2009167598Srrs return (&laddr->ifa->address.sa); 2010163953Srrs } 2011163953Srrs /* no valid addresses found */ 2012163953Srrs return (NULL); 2013163953Srrs} 2014163953Srrs 2015163953Srrs/* 2016163953Srrs * builds an ASCONF chunk from queued ASCONF params returns NULL on error (no 2017163953Srrs * mbuf, no ASCONF params queued, etc) 2018163953Srrs */ 2019163953Srrsstruct mbuf * 2020165647Srrssctp_compose_asconf(struct sctp_tcb *stcb, int *retlen) 2021163953Srrs{ 2022163953Srrs struct mbuf *m_asconf, *m_asconf_chk; 2023163953Srrs struct sctp_asconf_addr *aa; 2024163953Srrs struct sctp_asconf_chunk *acp; 2025163953Srrs struct sctp_asconf_paramhdr *aph; 2026163953Srrs struct sctp_asconf_addr_param *aap; 2027163953Srrs uint32_t p_length; 2028163953Srrs uint32_t correlation_id = 1; /* 0 is reserved... */ 2029163953Srrs caddr_t ptr, lookup_ptr; 2030163953Srrs uint8_t lookup_used = 0; 2031163953Srrs 2032163953Srrs /* are there any asconf params to send? */ 2033163953Srrs if (TAILQ_EMPTY(&stcb->asoc.asconf_queue)) { 2034163953Srrs return (NULL); 2035163953Srrs } 2036163953Srrs /* 2037163953Srrs * get a chunk header mbuf and a cluster for the asconf params since 2038163953Srrs * it's simpler to fill in the asconf chunk header lookup address on 2039163953Srrs * the fly 2040163953Srrs */ 2041165647Srrs m_asconf_chk = sctp_get_mbuf_for_msg(sizeof(struct sctp_asconf_chunk), 0, M_DONTWAIT, 1, MT_DATA); 2042163953Srrs if (m_asconf_chk == NULL) { 2043163953Srrs /* no mbuf's */ 2044169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2045169420Srrs "compose_asconf: couldn't get chunk mbuf!\n"); 2046163953Srrs return (NULL); 2047163953Srrs } 2048165647Srrs m_asconf = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA); 2049163953Srrs if (m_asconf == NULL) { 2050163953Srrs /* no mbuf's */ 2051169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2052169420Srrs "compose_asconf: couldn't get mbuf!\n"); 2053163953Srrs sctp_m_freem(m_asconf_chk); 2054163953Srrs return (NULL); 2055163953Srrs } 2056165647Srrs SCTP_BUF_LEN(m_asconf_chk) = sizeof(struct sctp_asconf_chunk); 2057165647Srrs SCTP_BUF_LEN(m_asconf) = 0; 2058163953Srrs acp = mtod(m_asconf_chk, struct sctp_asconf_chunk *); 2059163953Srrs bzero(acp, sizeof(struct sctp_asconf_chunk)); 2060163953Srrs /* save pointers to lookup address and asconf params */ 2061163953Srrs lookup_ptr = (caddr_t)(acp + 1); /* after the header */ 2062163953Srrs ptr = mtod(m_asconf, caddr_t); /* beginning of cluster */ 2063163953Srrs 2064163953Srrs /* fill in chunk header info */ 2065163953Srrs acp->ch.chunk_type = SCTP_ASCONF; 2066163953Srrs acp->ch.chunk_flags = 0; 2067163953Srrs acp->serial_number = htonl(stcb->asoc.asconf_seq_out); 2068163953Srrs 2069163953Srrs /* add parameters... up to smallest MTU allowed */ 2070163953Srrs TAILQ_FOREACH(aa, &stcb->asoc.asconf_queue, next) { 2071163953Srrs /* get the parameter length */ 2072163953Srrs p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length); 2073163953Srrs /* will it fit in current chunk? */ 2074165647Srrs if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) { 2075163953Srrs /* won't fit, so we're done with this chunk */ 2076163953Srrs break; 2077163953Srrs } 2078163953Srrs /* assign (and store) a correlation id */ 2079163953Srrs aa->ap.aph.correlation_id = correlation_id++; 2080163953Srrs 2081163953Srrs /* 2082163953Srrs * fill in address if we're doing a delete this is a simple 2083163953Srrs * way for us to fill in the correlation address, which 2084163953Srrs * should only be used by the peer if we're deleting our 2085163953Srrs * source address and adding a new address (e.g. renumbering 2086163953Srrs * case) 2087163953Srrs */ 2088163953Srrs if (lookup_used == 0 && 2089163953Srrs aa->ap.aph.ph.param_type == SCTP_DEL_IP_ADDRESS) { 2090163953Srrs struct sctp_ipv6addr_param *lookup; 2091163953Srrs uint16_t p_size, addr_size; 2092163953Srrs 2093163953Srrs lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2094163953Srrs lookup->ph.param_type = 2095163953Srrs htons(aa->ap.addrp.ph.param_type); 2096163953Srrs if (aa->ap.addrp.ph.param_type == SCTP_IPV6_ADDRESS) { 2097163953Srrs /* copy IPv6 address */ 2098163953Srrs p_size = sizeof(struct sctp_ipv6addr_param); 2099163953Srrs addr_size = sizeof(struct in6_addr); 2100163953Srrs } else { 2101163953Srrs /* copy IPv4 address */ 2102163953Srrs p_size = sizeof(struct sctp_ipv4addr_param); 2103163953Srrs addr_size = sizeof(struct in_addr); 2104163953Srrs } 2105163953Srrs lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2106163953Srrs memcpy(lookup->addr, &aa->ap.addrp.addr, addr_size); 2107165647Srrs SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2108163953Srrs lookup_used = 1; 2109163953Srrs } 2110163953Srrs /* copy into current space */ 2111163953Srrs memcpy(ptr, &aa->ap, p_length); 2112163953Srrs 2113163953Srrs /* network elements and update lengths */ 2114163953Srrs aph = (struct sctp_asconf_paramhdr *)ptr; 2115163953Srrs aap = (struct sctp_asconf_addr_param *)ptr; 2116163953Srrs /* correlation_id is transparent to peer, no htonl needed */ 2117163953Srrs aph->ph.param_type = htons(aph->ph.param_type); 2118163953Srrs aph->ph.param_length = htons(aph->ph.param_length); 2119163953Srrs aap->addrp.ph.param_type = htons(aap->addrp.ph.param_type); 2120163953Srrs aap->addrp.ph.param_length = htons(aap->addrp.ph.param_length); 2121163953Srrs 2122165647Srrs SCTP_BUF_LEN(m_asconf) += SCTP_SIZE32(p_length); 2123163953Srrs ptr += SCTP_SIZE32(p_length); 2124163953Srrs 2125163953Srrs /* 2126163953Srrs * these params are removed off the pending list upon 2127163953Srrs * getting an ASCONF-ACK back from the peer, just set flag 2128163953Srrs */ 2129163953Srrs aa->sent = 1; 2130163953Srrs } 2131163953Srrs /* check to see if the lookup addr has been populated yet */ 2132163953Srrs if (lookup_used == 0) { 2133163953Srrs /* NOTE: if the address param is optional, can skip this... */ 2134163953Srrs /* add any valid (existing) address... */ 2135163953Srrs struct sctp_ipv6addr_param *lookup; 2136163953Srrs uint16_t p_size, addr_size; 2137163953Srrs struct sockaddr *found_addr; 2138163953Srrs caddr_t addr_ptr; 2139163953Srrs 2140163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) 2141163953Srrs found_addr = sctp_find_valid_localaddr(stcb); 2142163953Srrs else 2143163953Srrs found_addr = sctp_find_valid_localaddr_ep(stcb); 2144163953Srrs 2145163953Srrs lookup = (struct sctp_ipv6addr_param *)lookup_ptr; 2146163953Srrs if (found_addr != NULL) { 2147163953Srrs if (found_addr->sa_family == AF_INET6) { 2148163953Srrs /* copy IPv6 address */ 2149163953Srrs lookup->ph.param_type = 2150163953Srrs htons(SCTP_IPV6_ADDRESS); 2151163953Srrs p_size = sizeof(struct sctp_ipv6addr_param); 2152163953Srrs addr_size = sizeof(struct in6_addr); 2153163953Srrs addr_ptr = (caddr_t)&((struct sockaddr_in6 *) 2154163953Srrs found_addr)->sin6_addr; 2155163953Srrs } else { 2156163953Srrs /* copy IPv4 address */ 2157163953Srrs lookup->ph.param_type = 2158163953Srrs htons(SCTP_IPV4_ADDRESS); 2159163953Srrs p_size = sizeof(struct sctp_ipv4addr_param); 2160163953Srrs addr_size = sizeof(struct in_addr); 2161163953Srrs addr_ptr = (caddr_t)&((struct sockaddr_in *) 2162163953Srrs found_addr)->sin_addr; 2163163953Srrs } 2164163953Srrs lookup->ph.param_length = htons(SCTP_SIZE32(p_size)); 2165163953Srrs memcpy(lookup->addr, addr_ptr, addr_size); 2166165647Srrs SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(p_size); 2167163953Srrs lookup_used = 1; 2168163953Srrs } else { 2169163953Srrs /* uh oh... don't have any address?? */ 2170169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2171169420Srrs "compose_asconf: no lookup addr!\n"); 2172163953Srrs /* for now, we send a IPv4 address of 0.0.0.0 */ 2173163953Srrs lookup->ph.param_type = htons(SCTP_IPV4_ADDRESS); 2174163953Srrs lookup->ph.param_length = htons(SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param))); 2175163953Srrs bzero(lookup->addr, sizeof(struct in_addr)); 2176165647Srrs SCTP_BUF_LEN(m_asconf_chk) += SCTP_SIZE32(sizeof(struct sctp_ipv4addr_param)); 2177163953Srrs lookup_used = 1; 2178163953Srrs } 2179163953Srrs } 2180163953Srrs /* chain it all together */ 2181165647Srrs SCTP_BUF_NEXT(m_asconf_chk) = m_asconf; 2182169655Srrs *retlen = SCTP_BUF_LEN(m_asconf_chk) + SCTP_BUF_LEN(m_asconf); 2183169655Srrs acp->ch.chunk_length = ntohs(*retlen); 2184163953Srrs 2185163953Srrs /* update "sent" flag */ 2186163953Srrs stcb->asoc.asconf_sent++; 2187163953Srrs 2188163953Srrs return (m_asconf_chk); 2189163953Srrs} 2190163953Srrs 2191163953Srrs/* 2192163953Srrs * section to handle address changes before an association is up eg. changes 2193163953Srrs * during INIT/INIT-ACK/COOKIE-ECHO handshake 2194163953Srrs */ 2195163953Srrs 2196163953Srrs/* 2197163953Srrs * processes the (local) addresses in the INIT-ACK chunk 2198163953Srrs */ 2199163953Srrsstatic void 2200163953Srrssctp_process_initack_addresses(struct sctp_tcb *stcb, struct mbuf *m, 2201163953Srrs unsigned int offset, unsigned int length) 2202163953Srrs{ 2203163953Srrs struct sctp_paramhdr tmp_param, *ph; 2204163953Srrs uint16_t plen, ptype; 2205167598Srrs struct sctp_ifa *sctp_ifa; 2206163953Srrs struct sctp_ipv6addr_param addr_store; 2207163953Srrs struct sockaddr_in6 sin6; 2208163953Srrs struct sockaddr_in sin; 2209163953Srrs struct sockaddr *sa; 2210167598Srrs uint32_t vrf_id; 2211163953Srrs 2212169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, "processing init-ack addresses\n"); 2213169420Srrs if (stcb == NULL) /* Un-needed check for SA */ 2214169420Srrs return; 2215163953Srrs 2216163953Srrs /* convert to upper bound */ 2217163953Srrs length += offset; 2218163953Srrs 2219163953Srrs if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2220163953Srrs return; 2221163953Srrs } 2222163953Srrs /* init the addresses */ 2223163953Srrs bzero(&sin6, sizeof(sin6)); 2224163953Srrs sin6.sin6_family = AF_INET6; 2225163953Srrs sin6.sin6_len = sizeof(sin6); 2226163953Srrs sin6.sin6_port = stcb->rport; 2227163953Srrs 2228163953Srrs bzero(&sin, sizeof(sin)); 2229163953Srrs sin.sin_len = sizeof(sin); 2230163953Srrs sin.sin_family = AF_INET; 2231163953Srrs sin.sin_port = stcb->rport; 2232163953Srrs 2233163953Srrs /* go through the addresses in the init-ack */ 2234163953Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2235163953Srrs sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2236163953Srrs while (ph != NULL) { 2237163953Srrs ptype = ntohs(ph->param_type); 2238163953Srrs plen = ntohs(ph->param_length); 2239163953Srrs if (ptype == SCTP_IPV6_ADDRESS) { 2240163953Srrs struct sctp_ipv6addr_param *a6p; 2241163953Srrs 2242163953Srrs /* get the entire IPv6 address param */ 2243163953Srrs a6p = (struct sctp_ipv6addr_param *) 2244163953Srrs sctp_m_getptr(m, offset, 2245163953Srrs sizeof(struct sctp_ipv6addr_param), 2246163953Srrs (uint8_t *) & addr_store); 2247163953Srrs if (plen != sizeof(struct sctp_ipv6addr_param) || 2248163953Srrs a6p == NULL) { 2249163953Srrs return; 2250163953Srrs } 2251163953Srrs memcpy(&sin6.sin6_addr, a6p->addr, 2252163953Srrs sizeof(struct in6_addr)); 2253163953Srrs sa = (struct sockaddr *)&sin6; 2254163953Srrs } else if (ptype == SCTP_IPV4_ADDRESS) { 2255163953Srrs struct sctp_ipv4addr_param *a4p; 2256163953Srrs 2257163953Srrs /* get the entire IPv4 address param */ 2258167598Srrs a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, offset, 2259167598Srrs sizeof(struct sctp_ipv4addr_param), 2260167598Srrs (uint8_t *) & addr_store); 2261163953Srrs if (plen != sizeof(struct sctp_ipv4addr_param) || 2262163953Srrs a4p == NULL) { 2263163953Srrs return; 2264163953Srrs } 2265163953Srrs sin.sin_addr.s_addr = a4p->addr; 2266163953Srrs sa = (struct sockaddr *)&sin; 2267163953Srrs } else { 2268163953Srrs goto next_addr; 2269163953Srrs } 2270163953Srrs 2271163953Srrs /* see if this address really (still) exists */ 2272168299Srrs if (stcb) { 2273168299Srrs vrf_id = stcb->asoc.vrf_id; 2274168299Srrs } else { 2275168299Srrs vrf_id = SCTP_DEFAULT_VRFID; 2276168299Srrs } 2277168299Srrs 2278167598Srrs sctp_ifa = sctp_find_ifa_by_addr(sa, vrf_id, 0); 2279167598Srrs if (sctp_ifa == NULL) { 2280163953Srrs /* address doesn't exist anymore */ 2281163953Srrs int status; 2282163953Srrs 2283163953Srrs /* are ASCONFs allowed ? */ 2284163953Srrs if ((sctp_is_feature_on(stcb->sctp_ep, 2285163953Srrs SCTP_PCB_FLAGS_DO_ASCONF)) && 2286163953Srrs stcb->asoc.peer_supports_asconf) { 2287163953Srrs /* queue an ASCONF DEL_IP_ADDRESS */ 2288163953Srrs status = sctp_asconf_queue_add_sa(stcb, sa, 2289163953Srrs SCTP_DEL_IP_ADDRESS); 2290163953Srrs /* 2291163953Srrs * if queued ok, and in correct state, set 2292163953Srrs * the ASCONF timer 2293163953Srrs */ 2294163953Srrs if (status == 0 && 2295163953Srrs SCTP_GET_STATE(&stcb->asoc) == 2296163953Srrs SCTP_STATE_OPEN) { 2297163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, 2298163953Srrs stcb->sctp_ep, stcb, 2299163953Srrs stcb->asoc.primary_destination); 2300163953Srrs } 2301163953Srrs } 2302163953Srrs } 2303163953Srrsnext_addr: 2304163953Srrs /* 2305163953Srrs * Sanity check: Make sure the length isn't 0, otherwise 2306163953Srrs * we'll be stuck in this loop for a long time... 2307163953Srrs */ 2308163953Srrs if (SCTP_SIZE32(plen) == 0) { 2309169420Srrs SCTP_PRINTF("process_initack_addrs: bad len (%d) type=%xh\n", 2310163953Srrs plen, ptype); 2311163953Srrs return; 2312163953Srrs } 2313163953Srrs /* get next parameter */ 2314163953Srrs offset += SCTP_SIZE32(plen); 2315163953Srrs if ((offset + sizeof(struct sctp_paramhdr)) > length) 2316163953Srrs return; 2317163953Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2318163953Srrs sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2319163953Srrs } /* while */ 2320163953Srrs} 2321163953Srrs 2322163953Srrs/* FIX ME: need to verify return result for v6 address type if v6 disabled */ 2323163953Srrs/* 2324163953Srrs * checks to see if a specific address is in the initack address list returns 2325163953Srrs * 1 if found, 0 if not 2326163953Srrs */ 2327163953Srrsstatic uint32_t 2328163953Srrssctp_addr_in_initack(struct sctp_tcb *stcb, struct mbuf *m, uint32_t offset, 2329163953Srrs uint32_t length, struct sockaddr *sa) 2330163953Srrs{ 2331163953Srrs struct sctp_paramhdr tmp_param, *ph; 2332163953Srrs uint16_t plen, ptype; 2333163953Srrs struct sctp_ipv6addr_param addr_store; 2334163953Srrs struct sockaddr_in *sin; 2335163953Srrs struct sctp_ipv4addr_param *a4p; 2336163953Srrs 2337163953Srrs#ifdef INET6 2338167598Srrs struct sockaddr_in6 *sin6; 2339163953Srrs struct sctp_ipv6addr_param *a6p; 2340167598Srrs struct sockaddr_in6 sin6_tmp; 2341163953Srrs 2342163953Srrs#endif /* INET6 */ 2343163953Srrs 2344163953Srrs if ( 2345163953Srrs#ifdef INET6 2346163953Srrs (sa->sa_family != AF_INET6) && 2347163953Srrs#endif /* INET6 */ 2348163953Srrs (sa->sa_family != AF_INET)) 2349163953Srrs return (0); 2350163953Srrs 2351169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF2, "find_initack_addr: starting search for "); 2352169420Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF2, sa); 2353163953Srrs /* convert to upper bound */ 2354163953Srrs length += offset; 2355163953Srrs 2356163953Srrs if ((offset + sizeof(struct sctp_paramhdr)) > length) { 2357169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2358169420Srrs "find_initack_addr: invalid offset?\n"); 2359163953Srrs return (0); 2360163953Srrs } 2361163953Srrs /* go through the addresses in the init-ack */ 2362163953Srrs ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, 2363163953Srrs sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param); 2364163953Srrs while (ph != NULL) { 2365163953Srrs ptype = ntohs(ph->param_type); 2366163953Srrs plen = ntohs(ph->param_length); 2367163953Srrs#ifdef INET6 2368163953Srrs if (ptype == SCTP_IPV6_ADDRESS && sa->sa_family == AF_INET6) { 2369163953Srrs /* get the entire IPv6 address param */ 2370163953Srrs a6p = (struct sctp_ipv6addr_param *) 2371163953Srrs sctp_m_getptr(m, offset, 2372163953Srrs sizeof(struct sctp_ipv6addr_param), 2373163953Srrs (uint8_t *) & addr_store); 2374163953Srrs if (plen != sizeof(struct sctp_ipv6addr_param) || 2375169420Srrs (ph == NULL) || 2376169420Srrs (a6p == NULL)) { 2377163953Srrs return (0); 2378163953Srrs } 2379163953Srrs sin6 = (struct sockaddr_in6 *)sa; 2380163953Srrs if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 2381163953Srrs /* create a copy and clear scope */ 2382163953Srrs memcpy(&sin6_tmp, sin6, 2383163953Srrs sizeof(struct sockaddr_in6)); 2384163953Srrs sin6 = &sin6_tmp; 2385163953Srrs in6_clearscope(&sin6->sin6_addr); 2386163953Srrs } 2387163953Srrs if (memcmp(&sin6->sin6_addr, a6p->addr, 2388163953Srrs sizeof(struct in6_addr)) == 0) { 2389163953Srrs /* found it */ 2390163953Srrs return (1); 2391163953Srrs } 2392163953Srrs } else 2393163953Srrs#endif /* INET6 */ 2394163953Srrs 2395163953Srrs if (ptype == SCTP_IPV4_ADDRESS && 2396163953Srrs sa->sa_family == AF_INET) { 2397163953Srrs /* get the entire IPv4 address param */ 2398163953Srrs a4p = (struct sctp_ipv4addr_param *)sctp_m_getptr(m, 2399163953Srrs offset, sizeof(struct sctp_ipv4addr_param), 2400163953Srrs (uint8_t *) & addr_store); 2401163953Srrs if (plen != sizeof(struct sctp_ipv4addr_param) || 2402169420Srrs (ph == NULL) || 2403169420Srrs (a4p == NULL)) { 2404163953Srrs return (0); 2405163953Srrs } 2406163953Srrs sin = (struct sockaddr_in *)sa; 2407163953Srrs if (sin->sin_addr.s_addr == a4p->addr) { 2408163953Srrs /* found it */ 2409163953Srrs return (1); 2410163953Srrs } 2411163953Srrs } 2412163953Srrs /* get next parameter */ 2413163953Srrs offset += SCTP_SIZE32(plen); 2414163953Srrs if (offset + sizeof(struct sctp_paramhdr) > length) 2415163953Srrs return (0); 2416163953Srrs ph = (struct sctp_paramhdr *) 2417163953Srrs sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr), 2418163953Srrs (uint8_t *) & tmp_param); 2419163953Srrs } /* while */ 2420163953Srrs /* not found! */ 2421163953Srrs return (0); 2422163953Srrs} 2423163953Srrs 2424163953Srrs/* 2425163953Srrs * makes sure that the current endpoint local addr list is consistent with 2426163953Srrs * the new association (eg. subset bound, asconf allowed) adds addresses as 2427163953Srrs * necessary 2428163953Srrs */ 2429163953Srrsstatic void 2430163953Srrssctp_check_address_list_ep(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2431163953Srrs int length, struct sockaddr *init_addr) 2432163953Srrs{ 2433163953Srrs struct sctp_laddr *laddr; 2434163953Srrs 2435163953Srrs /* go through the endpoint list */ 2436163953Srrs LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 2437163953Srrs /* be paranoid and validate the laddr */ 2438163953Srrs if (laddr->ifa == NULL) { 2439169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, 2440169420Srrs "check_addr_list_ep: laddr->ifa is NULL"); 2441163953Srrs continue; 2442163953Srrs } 2443167598Srrs if (laddr->ifa == NULL) { 2444169420Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "check_addr_list_ep: laddr->ifa->ifa_addr is NULL"); 2445163953Srrs continue; 2446163953Srrs } 2447163953Srrs /* do i have it implicitly? */ 2448167598Srrs if (sctp_cmpaddr(&laddr->ifa->address.sa, init_addr)) { 2449163953Srrs continue; 2450163953Srrs } 2451163953Srrs /* check to see if in the init-ack */ 2452163953Srrs if (!sctp_addr_in_initack(stcb, m, offset, length, 2453167598Srrs &laddr->ifa->address.sa)) { 2454163953Srrs /* try to add it */ 2455163953Srrs sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, laddr->ifa, 2456163953Srrs SCTP_ADD_IP_ADDRESS); 2457163953Srrs } 2458163953Srrs } 2459163953Srrs} 2460163953Srrs 2461163953Srrs/* 2462163953Srrs * makes sure that the current kernel address list is consistent with the new 2463163953Srrs * association (with all addrs bound) adds addresses as necessary 2464163953Srrs */ 2465163953Srrsstatic void 2466163953Srrssctp_check_address_list_all(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2467163953Srrs int length, struct sockaddr *init_addr, 2468163953Srrs uint16_t local_scope, uint16_t site_scope, 2469163953Srrs uint16_t ipv4_scope, uint16_t loopback_scope) 2470163953Srrs{ 2471167598Srrs struct sctp_vrf *vrf = NULL; 2472167598Srrs struct sctp_ifn *sctp_ifn; 2473167598Srrs struct sctp_ifa *sctp_ifa; 2474167598Srrs uint32_t vrf_id; 2475163953Srrs 2476168299Srrs if (stcb) { 2477168299Srrs vrf_id = stcb->asoc.vrf_id; 2478168299Srrs } else { 2479169420Srrs return; 2480168299Srrs } 2481167598Srrs vrf = sctp_find_vrf(vrf_id); 2482167598Srrs if (vrf == NULL) { 2483167598Srrs return; 2484167598Srrs } 2485163953Srrs /* go through all our known interfaces */ 2486167598Srrs LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 2487167598Srrs if (loopback_scope == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 2488163953Srrs /* skip loopback interface */ 2489163953Srrs continue; 2490163953Srrs } 2491163953Srrs /* go through each interface address */ 2492167598Srrs LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2493163953Srrs /* do i have it implicitly? */ 2494167598Srrs if (sctp_cmpaddr(&sctp_ifa->address.sa, init_addr)) { 2495163953Srrs continue; 2496163953Srrs } 2497163953Srrs /* check to see if in the init-ack */ 2498163953Srrs if (!sctp_addr_in_initack(stcb, m, offset, length, 2499167598Srrs &sctp_ifa->address.sa)) { 2500163953Srrs /* try to add it */ 2501163953Srrs sctp_addr_mgmt_assoc(stcb->sctp_ep, stcb, 2502167598Srrs sctp_ifa, SCTP_ADD_IP_ADDRESS); 2503163953Srrs } 2504163953Srrs } /* end foreach ifa */ 2505163953Srrs } /* end foreach ifn */ 2506163953Srrs} 2507163953Srrs 2508163953Srrs/* 2509163953Srrs * validates an init-ack chunk (from a cookie-echo) with current addresses 2510163953Srrs * adds addresses from the init-ack into our local address list, if needed 2511163953Srrs * queues asconf adds/deletes addresses as needed and makes appropriate list 2512163953Srrs * changes for source address selection m, offset: points to the start of the 2513163953Srrs * address list in an init-ack chunk length: total length of the address 2514163953Srrs * params only init_addr: address where my INIT-ACK was sent from 2515163953Srrs */ 2516163953Srrsvoid 2517163953Srrssctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, 2518163953Srrs int length, struct sockaddr *init_addr, 2519163953Srrs uint16_t local_scope, uint16_t site_scope, 2520163953Srrs uint16_t ipv4_scope, uint16_t loopback_scope) 2521163953Srrs{ 2522163953Srrs /* process the local addresses in the initack */ 2523163953Srrs sctp_process_initack_addresses(stcb, m, offset, length); 2524163953Srrs 2525163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2526163953Srrs /* bound all case */ 2527163953Srrs sctp_check_address_list_all(stcb, m, offset, length, init_addr, 2528163953Srrs local_scope, site_scope, ipv4_scope, loopback_scope); 2529163953Srrs } else { 2530163953Srrs /* subset bound case */ 2531163953Srrs if (sctp_is_feature_on(stcb->sctp_ep, 2532163953Srrs SCTP_PCB_FLAGS_DO_ASCONF)) { 2533163953Srrs /* asconf's allowed */ 2534163953Srrs sctp_check_address_list_ep(stcb, m, offset, length, 2535163953Srrs init_addr); 2536163953Srrs } 2537163953Srrs /* else, no asconfs allowed, so what we sent is what we get */ 2538163953Srrs } 2539163953Srrs} 2540163953Srrs 2541163953Srrs/* 2542163953Srrs * sctp_bindx() support 2543163953Srrs */ 2544163953Srrsuint32_t 2545169655Srrssctp_addr_mgmt_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa, 2546169655Srrs uint32_t type, uint32_t vrf_id) 2547163953Srrs{ 2548167598Srrs struct sctp_ifa *ifa; 2549163953Srrs 2550167598Srrs if (sa->sa_len == 0) { 2551163953Srrs return (EINVAL); 2552167598Srrs } 2553167598Srrs if (type == SCTP_ADD_IP_ADDRESS) { 2554167598Srrs /* For an add the address MUST be on the system */ 2555167598Srrs ifa = sctp_find_ifa_by_addr(sa, vrf_id, 0); 2556167598Srrs } else if (type == SCTP_DEL_IP_ADDRESS) { 2557167598Srrs /* For a delete we need to find it in the inp */ 2558167598Srrs ifa = sctp_find_ifa_in_ep(inp, sa, 0); 2559167598Srrs } else { 2560167598Srrs ifa = NULL; 2561167598Srrs } 2562163953Srrs if (ifa != NULL) { 2563167598Srrs /* add this address */ 2564167598Srrs struct sctp_asconf_iterator *asc; 2565167598Srrs struct sctp_laddr *wi; 2566163953Srrs 2567167598Srrs SCTP_MALLOC(asc, struct sctp_asconf_iterator *, 2568169655Srrs sizeof(struct sctp_asconf_iterator), 2569170091Srrs SCTP_M_ASC_IT); 2570167598Srrs if (asc == NULL) { 2571167598Srrs return (ENOMEM); 2572167598Srrs } 2573169655Srrs wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, 2574169655Srrs struct sctp_laddr); 2575167598Srrs if (wi == NULL) { 2576170091Srrs SCTP_FREE(asc, SCTP_M_ASC_IT); 2577167598Srrs return (ENOMEM); 2578167598Srrs } 2579167598Srrs if (type == SCTP_ADD_IP_ADDRESS) { 2580167598Srrs sctp_add_local_addr_ep(inp, ifa, type); 2581167598Srrs } else if (type == SCTP_DEL_IP_ADDRESS) { 2582167598Srrs struct sctp_laddr *laddr; 2583167598Srrs 2584169655Srrs if (inp->laddr_count < 2) { 2585169655Srrs /* can't delete the last local address */ 2586169655Srrs return (EINVAL); 2587169655Srrs } 2588169655Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, 2589169655Srrs sctp_nxt_addr) { 2590167598Srrs if (ifa == laddr->ifa) { 2591167598Srrs /* Mark in the delete */ 2592167598Srrs laddr->action = type; 2593167598Srrs } 2594163953Srrs } 2595163953Srrs } 2596167598Srrs LIST_INIT(&asc->list_of_work); 2597167598Srrs asc->cnt = 1; 2598167598Srrs SCTP_INCR_LADDR_COUNT(); 2599167598Srrs wi->ifa = ifa; 2600167598Srrs wi->action = type; 2601167598Srrs atomic_add_int(&ifa->refcount, 1); 2602167598Srrs LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); 2603169420Srrs (void)sctp_initiate_iterator(sctp_iterator_ep, 2604167598Srrs sctp_iterator_stcb, 2605167598Srrs sctp_iterator_ep_end, 2606167598Srrs SCTP_PCB_ANY_FLAGS, 2607169655Srrs SCTP_PCB_ANY_FEATURES, 2608169655Srrs SCTP_ASOC_ANY_STATE, (void *)asc, 0, 2609167598Srrs sctp_iterator_end, inp, 0); 2610163953Srrs } else { 2611163953Srrs /* invalid address! */ 2612163953Srrs return (EADDRNOTAVAIL); 2613163953Srrs } 2614163953Srrs return (0); 2615163953Srrs} 2616