1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <stdio.h> 39 #include <string.h> 40 #include <errno.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 #include <sys/errno.h> 46 #include <sys/syscall.h> 47 #include <sys/uio.h> 48 #include <netinet/in.h> 49 #include <arpa/inet.h> 50 #include <netinet/sctp_uio.h> 51 #include <netinet/sctp.h> 52 53 #ifndef IN6_IS_ADDR_V4MAPPED 54 #define IN6_IS_ADDR_V4MAPPED(a) \ 55 ((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \ 56 (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \ 57 (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff))) 58 #endif 59 60 #define SCTP_CONTROL_VEC_SIZE_RCV 16384 61 62 63 static void 64 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 65 { 66 bzero(sin, sizeof(*sin)); 67 sin->sin_len = sizeof(struct sockaddr_in); 68 sin->sin_family = AF_INET; 69 sin->sin_port = sin6->sin6_port; 70 sin->sin_addr.s_addr = sin6->sin6_addr.__u6_addr.__u6_addr32[3]; 71 } 72 73 int 74 sctp_getaddrlen(sa_family_t family) 75 { 76 int ret, sd; 77 socklen_t siz; 78 struct sctp_assoc_value av; 79 80 av.assoc_value = family; 81 siz = sizeof(av); 82 #if defined(AF_INET) 83 sd = socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP); 84 #elif defined(AF_INET6) 85 sd = socket(AF_INET6, SOCK_SEQPACKET, IPPROTO_SCTP); 86 #else 87 sd = -1; 88 #endif 89 if (sd == -1) { 90 return (-1); 91 } 92 ret = getsockopt(sd, IPPROTO_SCTP, SCTP_GET_ADDR_LEN, &av, &siz); 93 close(sd); 94 if (ret == 0) { 95 return ((int)av.assoc_value); 96 } else { 97 return (-1); 98 } 99 } 100 101 int 102 sctp_connectx(int sd, const struct sockaddr *addrs, int addrcnt, 103 sctp_assoc_t *id) 104 { 105 char *buf; 106 int i, ret, *aa; 107 char *cpto; 108 const struct sockaddr *at; 109 size_t len; 110 111 /* validate the address count and list */ 112 if ((addrs == NULL) || (addrcnt <= 0)) { 113 errno = EINVAL; 114 return (-1); 115 } 116 if ((buf = malloc(sizeof(int) + (size_t)addrcnt * sizeof(struct sockaddr_in6))) == NULL) { 117 errno = E2BIG; 118 return (-1); 119 } 120 len = sizeof(int); 121 at = addrs; 122 cpto = buf + sizeof(int); 123 /* validate all the addresses and get the size */ 124 for (i = 0; i < addrcnt; i++) { 125 switch (at->sa_family) { 126 case AF_INET: 127 if (at->sa_len != sizeof(struct sockaddr_in)) { 128 free(buf); 129 errno = EINVAL; 130 return (-1); 131 } 132 memcpy(cpto, at, sizeof(struct sockaddr_in)); 133 cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in)); 134 len += sizeof(struct sockaddr_in); 135 break; 136 case AF_INET6: 137 if (at->sa_len != sizeof(struct sockaddr_in6)) { 138 free(buf); 139 errno = EINVAL; 140 return (-1); 141 } 142 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)at)->sin6_addr)) { 143 in6_sin6_2_sin((struct sockaddr_in *)cpto, (struct sockaddr_in6 *)at); 144 cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in)); 145 len += sizeof(struct sockaddr_in); 146 } else { 147 memcpy(cpto, at, sizeof(struct sockaddr_in6)); 148 cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in6)); 149 len += sizeof(struct sockaddr_in6); 150 } 151 break; 152 default: 153 free(buf); 154 errno = EINVAL; 155 return (-1); 156 } 157 at = (struct sockaddr *)((caddr_t)at + at->sa_len); 158 } 159 aa = (int *)buf; 160 *aa = addrcnt; 161 ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X, (void *)buf, 162 (socklen_t)len); 163 if ((ret == 0) && (id != NULL)) { 164 *id = *(sctp_assoc_t *)buf; 165 } 166 free(buf); 167 return (ret); 168 } 169 170 int 171 sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, int flags) 172 { 173 struct sctp_getaddresses *gaddrs; 174 struct sockaddr *sa; 175 struct sockaddr_in *sin; 176 struct sockaddr_in6 *sin6; 177 int i; 178 size_t argsz; 179 uint16_t sport = 0; 180 181 /* validate the flags */ 182 if ((flags != SCTP_BINDX_ADD_ADDR) && 183 (flags != SCTP_BINDX_REM_ADDR)) { 184 errno = EFAULT; 185 return (-1); 186 } 187 /* validate the address count and list */ 188 if ((addrcnt <= 0) || (addrs == NULL)) { 189 errno = EINVAL; 190 return (-1); 191 } 192 /* First pre-screen the addresses */ 193 sa = addrs; 194 for (i = 0; i < addrcnt; i++) { 195 switch (sa->sa_family) { 196 case AF_INET: 197 if (sa->sa_len != sizeof(struct sockaddr_in)) { 198 errno = EINVAL; 199 return (-1); 200 } 201 sin = (struct sockaddr_in *)sa; 202 if (sin->sin_port) { 203 /* non-zero port, check or save */ 204 if (sport) { 205 /* Check against our port */ 206 if (sport != sin->sin_port) { 207 errno = EINVAL; 208 return (-1); 209 } 210 } else { 211 /* save off the port */ 212 sport = sin->sin_port; 213 } 214 } 215 break; 216 case AF_INET6: 217 if (sa->sa_len != sizeof(struct sockaddr_in6)) { 218 errno = EINVAL; 219 return (-1); 220 } 221 sin6 = (struct sockaddr_in6 *)sa; 222 if (sin6->sin6_port) { 223 /* non-zero port, check or save */ 224 if (sport) { 225 /* Check against our port */ 226 if (sport != sin6->sin6_port) { 227 errno = EINVAL; 228 return (-1); 229 } 230 } else { 231 /* save off the port */ 232 sport = sin6->sin6_port; 233 } 234 } 235 break; 236 default: 237 /* Invalid address family specified. */ 238 errno = EAFNOSUPPORT; 239 return (-1); 240 } 241 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 242 } 243 argsz = sizeof(struct sctp_getaddresses) + 244 sizeof(struct sockaddr_storage); 245 if ((gaddrs = (struct sctp_getaddresses *)malloc(argsz)) == NULL) { 246 errno = ENOMEM; 247 return (-1); 248 } 249 sa = addrs; 250 for (i = 0; i < addrcnt; i++) { 251 memset(gaddrs, 0, argsz); 252 gaddrs->sget_assoc_id = 0; 253 memcpy(gaddrs->addr, sa, sa->sa_len); 254 /* 255 * Now, if there was a port mentioned, assure that the first 256 * address has that port to make sure it fails or succeeds 257 * correctly. 258 */ 259 if ((i == 0) && (sport != 0)) { 260 switch (gaddrs->addr->sa_family) { 261 case AF_INET: 262 sin = (struct sockaddr_in *)gaddrs->addr; 263 sin->sin_port = sport; 264 break; 265 case AF_INET6: 266 sin6 = (struct sockaddr_in6 *)gaddrs->addr; 267 sin6->sin6_port = sport; 268 break; 269 } 270 } 271 if (setsockopt(sd, IPPROTO_SCTP, flags, gaddrs, 272 (socklen_t)argsz) != 0) { 273 free(gaddrs); 274 return (-1); 275 } 276 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 277 } 278 free(gaddrs); 279 return (0); 280 } 281 282 int 283 sctp_opt_info(int sd, sctp_assoc_t id, int opt, void *arg, socklen_t *size) 284 { 285 if (arg == NULL) { 286 errno = EINVAL; 287 return (-1); 288 } 289 if ((id == SCTP_CURRENT_ASSOC) || 290 (id == SCTP_ALL_ASSOC)) { 291 errno = EINVAL; 292 return (-1); 293 } 294 switch (opt) { 295 case SCTP_RTOINFO: 296 ((struct sctp_rtoinfo *)arg)->srto_assoc_id = id; 297 break; 298 case SCTP_ASSOCINFO: 299 ((struct sctp_assocparams *)arg)->sasoc_assoc_id = id; 300 break; 301 case SCTP_DEFAULT_SEND_PARAM: 302 ((struct sctp_assocparams *)arg)->sasoc_assoc_id = id; 303 break; 304 case SCTP_PRIMARY_ADDR: 305 ((struct sctp_setprim *)arg)->ssp_assoc_id = id; 306 break; 307 case SCTP_PEER_ADDR_PARAMS: 308 ((struct sctp_paddrparams *)arg)->spp_assoc_id = id; 309 break; 310 case SCTP_MAXSEG: 311 ((struct sctp_assoc_value *)arg)->assoc_id = id; 312 break; 313 case SCTP_AUTH_KEY: 314 ((struct sctp_authkey *)arg)->sca_assoc_id = id; 315 break; 316 case SCTP_AUTH_ACTIVE_KEY: 317 ((struct sctp_authkeyid *)arg)->scact_assoc_id = id; 318 break; 319 case SCTP_DELAYED_SACK: 320 ((struct sctp_sack_info *)arg)->sack_assoc_id = id; 321 break; 322 case SCTP_CONTEXT: 323 ((struct sctp_assoc_value *)arg)->assoc_id = id; 324 break; 325 case SCTP_STATUS: 326 ((struct sctp_status *)arg)->sstat_assoc_id = id; 327 break; 328 case SCTP_GET_PEER_ADDR_INFO: 329 ((struct sctp_paddrinfo *)arg)->spinfo_assoc_id = id; 330 break; 331 case SCTP_PEER_AUTH_CHUNKS: 332 ((struct sctp_authchunks *)arg)->gauth_assoc_id = id; 333 break; 334 case SCTP_LOCAL_AUTH_CHUNKS: 335 ((struct sctp_authchunks *)arg)->gauth_assoc_id = id; 336 break; 337 case SCTP_TIMEOUTS: 338 ((struct sctp_timeouts *)arg)->stimo_assoc_id = id; 339 break; 340 case SCTP_EVENT: 341 ((struct sctp_event *)arg)->se_assoc_id = id; 342 break; 343 case SCTP_DEFAULT_SNDINFO: 344 ((struct sctp_sndinfo *)arg)->snd_assoc_id = id; 345 break; 346 case SCTP_DEFAULT_PRINFO: 347 ((struct sctp_default_prinfo *)arg)->pr_assoc_id = id; 348 break; 349 case SCTP_PEER_ADDR_THLDS: 350 ((struct sctp_paddrthlds *)arg)->spt_assoc_id = id; 351 break; 352 case SCTP_REMOTE_UDP_ENCAPS_PORT: 353 ((struct sctp_udpencaps *)arg)->sue_assoc_id = id; 354 break; 355 case SCTP_ECN_SUPPORTED: 356 ((struct sctp_assoc_value *)arg)->assoc_id = id; 357 break; 358 case SCTP_PR_SUPPORTED: 359 ((struct sctp_assoc_value *)arg)->assoc_id = id; 360 break; 361 case SCTP_AUTH_SUPPORTED: 362 ((struct sctp_assoc_value *)arg)->assoc_id = id; 363 break; 364 case SCTP_ASCONF_SUPPORTED: 365 ((struct sctp_assoc_value *)arg)->assoc_id = id; 366 break; 367 case SCTP_RECONFIG_SUPPORTED: 368 ((struct sctp_assoc_value *)arg)->assoc_id = id; 369 break; 370 case SCTP_NRSACK_SUPPORTED: 371 ((struct sctp_assoc_value *)arg)->assoc_id = id; 372 break; 373 case SCTP_PKTDROP_SUPPORTED: 374 ((struct sctp_assoc_value *)arg)->assoc_id = id; 375 break; 376 case SCTP_MAX_BURST: 377 ((struct sctp_assoc_value *)arg)->assoc_id = id; 378 break; 379 case SCTP_ENABLE_STREAM_RESET: 380 ((struct sctp_assoc_value *)arg)->assoc_id = id; 381 break; 382 case SCTP_PR_STREAM_STATUS: 383 ((struct sctp_prstatus *)arg)->sprstat_assoc_id = id; 384 break; 385 case SCTP_PR_ASSOC_STATUS: 386 ((struct sctp_prstatus *)arg)->sprstat_assoc_id = id; 387 break; 388 case SCTP_MAX_CWND: 389 ((struct sctp_assoc_value *)arg)->assoc_id = id; 390 break; 391 default: 392 break; 393 } 394 return (getsockopt(sd, IPPROTO_SCTP, opt, arg, size)); 395 } 396 397 int 398 sctp_getpaddrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) 399 { 400 struct sctp_getaddresses *addrs; 401 struct sockaddr *sa; 402 sctp_assoc_t asoc; 403 caddr_t lim; 404 socklen_t opt_len; 405 int cnt; 406 407 if (raddrs == NULL) { 408 errno = EFAULT; 409 return (-1); 410 } 411 asoc = id; 412 opt_len = (socklen_t)sizeof(sctp_assoc_t); 413 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_REMOTE_ADDR_SIZE, 414 &asoc, &opt_len) != 0) { 415 return (-1); 416 } 417 /* size required is returned in 'asoc' */ 418 opt_len = (socklen_t)((size_t)asoc + sizeof(sctp_assoc_t)); 419 addrs = calloc(1, (size_t)opt_len); 420 if (addrs == NULL) { 421 errno = ENOMEM; 422 return (-1); 423 } 424 addrs->sget_assoc_id = id; 425 /* Now lets get the array of addresses */ 426 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_PEER_ADDRESSES, 427 addrs, &opt_len) != 0) { 428 free(addrs); 429 return (-1); 430 } 431 *raddrs = (struct sockaddr *)&addrs->addr[0]; 432 cnt = 0; 433 sa = (struct sockaddr *)&addrs->addr[0]; 434 lim = (caddr_t)addrs + opt_len; 435 while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { 436 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 437 cnt++; 438 } 439 return (cnt); 440 } 441 442 void 443 sctp_freepaddrs(struct sockaddr *addrs) 444 { 445 void *fr_addr; 446 447 /* Take away the hidden association id */ 448 fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); 449 /* Now free it */ 450 free(fr_addr); 451 } 452 453 int 454 sctp_getladdrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) 455 { 456 struct sctp_getaddresses *addrs; 457 caddr_t lim; 458 struct sockaddr *sa; 459 size_t size_of_addresses; 460 socklen_t opt_len; 461 int cnt; 462 463 if (raddrs == NULL) { 464 errno = EFAULT; 465 return (-1); 466 } 467 size_of_addresses = 0; 468 opt_len = (socklen_t)sizeof(int); 469 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDR_SIZE, 470 &size_of_addresses, &opt_len) != 0) { 471 errno = ENOMEM; 472 return (-1); 473 } 474 if (size_of_addresses == 0) { 475 errno = ENOTCONN; 476 return (-1); 477 } 478 opt_len = (socklen_t)(size_of_addresses + sizeof(sctp_assoc_t)); 479 addrs = calloc(1, (size_t)opt_len); 480 if (addrs == NULL) { 481 errno = ENOMEM; 482 return (-1); 483 } 484 addrs->sget_assoc_id = id; 485 /* Now lets get the array of addresses */ 486 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDRESSES, addrs, 487 &opt_len) != 0) { 488 free(addrs); 489 errno = ENOMEM; 490 return (-1); 491 } 492 *raddrs = (struct sockaddr *)&addrs->addr[0]; 493 cnt = 0; 494 sa = (struct sockaddr *)&addrs->addr[0]; 495 lim = (caddr_t)addrs + opt_len; 496 while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { 497 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 498 cnt++; 499 } 500 return (cnt); 501 } 502 503 void 504 sctp_freeladdrs(struct sockaddr *addrs) 505 { 506 void *fr_addr; 507 508 /* Take away the hidden association id */ 509 fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); 510 /* Now free it */ 511 free(fr_addr); 512 } 513 514 ssize_t 515 sctp_sendmsg(int s, 516 const void *data, 517 size_t len, 518 const struct sockaddr *to, 519 socklen_t tolen, 520 uint32_t ppid, 521 uint32_t flags, 522 uint16_t stream_no, 523 uint32_t timetolive, 524 uint32_t context) 525 { 526 #ifdef SYS_sctp_generic_sendmsg 527 struct sctp_sndrcvinfo sinfo; 528 529 memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo)); 530 sinfo.sinfo_ppid = ppid; 531 sinfo.sinfo_flags = flags; 532 sinfo.sinfo_stream = stream_no; 533 sinfo.sinfo_timetolive = timetolive; 534 sinfo.sinfo_context = context; 535 sinfo.sinfo_assoc_id = 0; 536 return (syscall(SYS_sctp_generic_sendmsg, s, 537 data, len, to, tolen, &sinfo, 0)); 538 #else 539 struct msghdr msg; 540 struct sctp_sndrcvinfo *sinfo; 541 struct iovec iov; 542 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; 543 struct cmsghdr *cmsg; 544 struct sockaddr *who = NULL; 545 union { 546 struct sockaddr_in in; 547 struct sockaddr_in6 in6; 548 } addr; 549 550 if ((tolen > 0) && 551 ((to == NULL) || (tolen < sizeof(struct sockaddr)))) { 552 errno = EINVAL; 553 return (-1); 554 } 555 if ((to != NULL) && (tolen > 0)) { 556 switch (to->sa_family) { 557 case AF_INET: 558 if (tolen != sizeof(struct sockaddr_in)) { 559 errno = EINVAL; 560 return (-1); 561 } 562 if ((to->sa_len > 0) && 563 (to->sa_len != sizeof(struct sockaddr_in))) { 564 errno = EINVAL; 565 return (-1); 566 } 567 memcpy(&addr, to, sizeof(struct sockaddr_in)); 568 addr.in.sin_len = sizeof(struct sockaddr_in); 569 break; 570 case AF_INET6: 571 if (tolen != sizeof(struct sockaddr_in6)) { 572 errno = EINVAL; 573 return (-1); 574 } 575 if ((to->sa_len > 0) && 576 (to->sa_len != sizeof(struct sockaddr_in6))) { 577 errno = EINVAL; 578 return (-1); 579 } 580 memcpy(&addr, to, sizeof(struct sockaddr_in6)); 581 addr.in6.sin6_len = sizeof(struct sockaddr_in6); 582 break; 583 default: 584 errno = EAFNOSUPPORT; 585 return (-1); 586 } 587 who = (struct sockaddr *)&addr; 588 } 589 590 iov.iov_base = (char *)data; 591 iov.iov_len = len; 592 593 if (who) { 594 msg.msg_name = (caddr_t)who; 595 msg.msg_namelen = who->sa_len; 596 } else { 597 msg.msg_name = (caddr_t)NULL; 598 msg.msg_namelen = 0; 599 } 600 msg.msg_iov = &iov; 601 msg.msg_iovlen = 1; 602 msg.msg_control = cmsgbuf; 603 msg.msg_controllen = CMSG_SPACE(sizeof(struct sctp_sndrcvinfo)); 604 msg.msg_flags = 0; 605 cmsg = (struct cmsghdr *)cmsgbuf; 606 cmsg->cmsg_level = IPPROTO_SCTP; 607 cmsg->cmsg_type = SCTP_SNDRCV; 608 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); 609 sinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 610 memset(sinfo, 0, sizeof(struct sctp_sndrcvinfo)); 611 sinfo->sinfo_stream = stream_no; 612 sinfo->sinfo_ssn = 0; 613 sinfo->sinfo_flags = flags; 614 sinfo->sinfo_ppid = ppid; 615 sinfo->sinfo_context = context; 616 sinfo->sinfo_assoc_id = 0; 617 sinfo->sinfo_timetolive = timetolive; 618 return (sendmsg(s, &msg, 0)); 619 #endif 620 } 621 622 623 sctp_assoc_t 624 sctp_getassocid(int sd, struct sockaddr *sa) 625 { 626 struct sctp_paddrinfo sp; 627 socklen_t siz; 628 629 /* First get the assoc id */ 630 siz = sizeof(sp); 631 memset(&sp, 0, sizeof(sp)); 632 memcpy((caddr_t)&sp.spinfo_address, sa, sa->sa_len); 633 if (getsockopt(sd, IPPROTO_SCTP, 634 SCTP_GET_PEER_ADDR_INFO, &sp, &siz) != 0) { 635 /* We depend on the fact that 0 can never be returned */ 636 return ((sctp_assoc_t)0); 637 } 638 return (sp.spinfo_assoc_id); 639 } 640 641 ssize_t 642 sctp_send(int sd, const void *data, size_t len, 643 const struct sctp_sndrcvinfo *sinfo, 644 int flags) 645 { 646 647 #ifdef SYS_sctp_generic_sendmsg 648 struct sockaddr *to = NULL; 649 650 return (syscall(SYS_sctp_generic_sendmsg, sd, 651 data, len, to, 0, sinfo, flags)); 652 #else 653 struct msghdr msg; 654 struct iovec iov; 655 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; 656 struct cmsghdr *cmsg; 657 658 if (sinfo == NULL) { 659 errno = EINVAL; 660 return (-1); 661 } 662 iov.iov_base = (char *)data; 663 iov.iov_len = len; 664 665 msg.msg_name = NULL; 666 msg.msg_namelen = 0; 667 msg.msg_iov = &iov; 668 msg.msg_iovlen = 1; 669 msg.msg_control = cmsgbuf; 670 msg.msg_controllen = CMSG_SPACE(sizeof(struct sctp_sndrcvinfo)); 671 msg.msg_flags = 0; 672 cmsg = (struct cmsghdr *)cmsgbuf; 673 cmsg->cmsg_level = IPPROTO_SCTP; 674 cmsg->cmsg_type = SCTP_SNDRCV; 675 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); 676 memcpy(CMSG_DATA(cmsg), sinfo, sizeof(struct sctp_sndrcvinfo)); 677 return (sendmsg(sd, &msg, flags)); 678 #endif 679 } 680 681 682 683 ssize_t 684 sctp_sendx(int sd, const void *msg, size_t msg_len, 685 struct sockaddr *addrs, int addrcnt, 686 struct sctp_sndrcvinfo *sinfo, 687 int flags) 688 { 689 struct sctp_sndrcvinfo __sinfo; 690 ssize_t ret; 691 int i, cnt, *aa, saved_errno; 692 char *buf; 693 int no_end_cx = 0; 694 size_t len, add_len; 695 struct sockaddr *at; 696 697 if (addrs == NULL) { 698 errno = EINVAL; 699 return (-1); 700 } 701 #ifdef SYS_sctp_generic_sendmsg 702 if (addrcnt == 1) { 703 socklen_t l; 704 ssize_t ret; 705 706 /* 707 * Quick way, we don't need to do a connectx so lets use the 708 * syscall directly. 709 */ 710 l = addrs->sa_len; 711 ret = syscall(SYS_sctp_generic_sendmsg, sd, 712 msg, msg_len, addrs, l, sinfo, flags); 713 if ((ret >= 0) && (sinfo != NULL)) { 714 sinfo->sinfo_assoc_id = sctp_getassocid(sd, addrs); 715 } 716 return (ret); 717 } 718 #endif 719 720 len = sizeof(int); 721 at = addrs; 722 cnt = 0; 723 /* validate all the addresses and get the size */ 724 for (i = 0; i < addrcnt; i++) { 725 if (at->sa_family == AF_INET) { 726 add_len = sizeof(struct sockaddr_in); 727 } else if (at->sa_family == AF_INET6) { 728 add_len = sizeof(struct sockaddr_in6); 729 } else { 730 errno = EINVAL; 731 return (-1); 732 } 733 len += add_len; 734 at = (struct sockaddr *)((caddr_t)at + add_len); 735 cnt++; 736 } 737 /* do we have any? */ 738 if (cnt == 0) { 739 errno = EINVAL; 740 return (-1); 741 } 742 buf = malloc(len); 743 if (buf == NULL) { 744 errno = ENOMEM; 745 return (-1); 746 } 747 aa = (int *)buf; 748 *aa = cnt; 749 aa++; 750 memcpy((caddr_t)aa, addrs, (size_t)(len - sizeof(int))); 751 ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_DELAYED, (void *)buf, 752 (socklen_t)len); 753 754 free(buf); 755 if (ret != 0) { 756 if (errno == EALREADY) { 757 no_end_cx = 1; 758 goto continue_send; 759 } 760 return (ret); 761 } 762 continue_send: 763 if (sinfo == NULL) { 764 sinfo = &__sinfo; 765 memset(&__sinfo, 0, sizeof(__sinfo)); 766 } 767 sinfo->sinfo_assoc_id = sctp_getassocid(sd, addrs); 768 if (sinfo->sinfo_assoc_id == 0) { 769 (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, 770 (socklen_t)addrs->sa_len); 771 errno = ENOENT; 772 return (-1); 773 } 774 ret = sctp_send(sd, msg, msg_len, sinfo, flags); 775 saved_errno = errno; 776 if (no_end_cx == 0) 777 (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, 778 (socklen_t)addrs->sa_len); 779 780 errno = saved_errno; 781 return (ret); 782 } 783 784 ssize_t 785 sctp_sendmsgx(int sd, 786 const void *msg, 787 size_t len, 788 struct sockaddr *addrs, 789 int addrcnt, 790 uint32_t ppid, 791 uint32_t flags, 792 uint16_t stream_no, 793 uint32_t timetolive, 794 uint32_t context) 795 { 796 struct sctp_sndrcvinfo sinfo; 797 798 memset((void *)&sinfo, 0, sizeof(struct sctp_sndrcvinfo)); 799 sinfo.sinfo_ppid = ppid; 800 sinfo.sinfo_flags = flags; 801 sinfo.sinfo_stream = stream_no; 802 sinfo.sinfo_timetolive = timetolive; 803 sinfo.sinfo_context = context; 804 return (sctp_sendx(sd, msg, len, addrs, addrcnt, &sinfo, 0)); 805 } 806 807 ssize_t 808 sctp_recvmsg(int s, 809 void *dbuf, 810 size_t len, 811 struct sockaddr *from, 812 socklen_t *fromlen, 813 struct sctp_sndrcvinfo *sinfo, 814 int *msg_flags) 815 { 816 #ifdef SYS_sctp_generic_recvmsg 817 struct iovec iov; 818 819 iov.iov_base = dbuf; 820 iov.iov_len = len; 821 return (syscall(SYS_sctp_generic_recvmsg, s, 822 &iov, 1, from, fromlen, sinfo, msg_flags)); 823 #else 824 ssize_t sz; 825 struct msghdr msg; 826 struct iovec iov; 827 char cmsgbuf[SCTP_CONTROL_VEC_SIZE_RCV]; 828 struct cmsghdr *cmsg; 829 830 if (msg_flags == NULL) { 831 errno = EINVAL; 832 return (-1); 833 } 834 iov.iov_base = dbuf; 835 iov.iov_len = len; 836 msg.msg_name = (caddr_t)from; 837 if (fromlen == NULL) 838 msg.msg_namelen = 0; 839 else 840 msg.msg_namelen = *fromlen; 841 msg.msg_iov = &iov; 842 msg.msg_iovlen = 1; 843 msg.msg_control = cmsgbuf; 844 msg.msg_controllen = sizeof(cmsgbuf); 845 msg.msg_flags = 0; 846 sz = recvmsg(s, &msg, *msg_flags); 847 *msg_flags = msg.msg_flags; 848 if (sz <= 0) { 849 return (sz); 850 } 851 if (sinfo) { 852 sinfo->sinfo_assoc_id = 0; 853 } 854 if ((msg.msg_controllen > 0) && (sinfo != NULL)) { 855 /* 856 * parse through and see if we find the sctp_sndrcvinfo (if 857 * the user wants it). 858 */ 859 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { 860 if (cmsg->cmsg_level != IPPROTO_SCTP) { 861 continue; 862 } 863 if (cmsg->cmsg_type == SCTP_SNDRCV) { 864 memcpy(sinfo, CMSG_DATA(cmsg), sizeof(struct sctp_sndrcvinfo)); 865 break; 866 } 867 if (cmsg->cmsg_type == SCTP_EXTRCV) { 868 /* 869 * Let's hope that the user provided enough 870 * enough memory. At least he asked for more 871 * information. 872 */ 873 memcpy(sinfo, CMSG_DATA(cmsg), sizeof(struct sctp_extrcvinfo)); 874 break; 875 } 876 } 877 } 878 return (sz); 879 #endif 880 } 881 882 ssize_t 883 sctp_recvv(int sd, 884 const struct iovec *iov, 885 int iovlen, 886 struct sockaddr *from, 887 socklen_t *fromlen, 888 void *info, 889 socklen_t *infolen, 890 unsigned int *infotype, 891 int *flags) 892 { 893 char cmsgbuf[SCTP_CONTROL_VEC_SIZE_RCV]; 894 struct msghdr msg; 895 struct cmsghdr *cmsg; 896 ssize_t ret; 897 struct sctp_rcvinfo *rcvinfo; 898 struct sctp_nxtinfo *nxtinfo; 899 900 if (((info != NULL) && (infolen == NULL)) || 901 ((info == NULL) && (infolen != NULL) && (*infolen != 0)) || 902 ((info != NULL) && (infotype == NULL))) { 903 errno = EINVAL; 904 return (-1); 905 } 906 if (infotype) { 907 *infotype = SCTP_RECVV_NOINFO; 908 } 909 msg.msg_name = from; 910 if (fromlen == NULL) { 911 msg.msg_namelen = 0; 912 } else { 913 msg.msg_namelen = *fromlen; 914 } 915 msg.msg_iov = (struct iovec *)iov; 916 msg.msg_iovlen = iovlen; 917 msg.msg_control = cmsgbuf; 918 msg.msg_controllen = sizeof(cmsgbuf); 919 msg.msg_flags = 0; 920 ret = recvmsg(sd, &msg, *flags); 921 *flags = msg.msg_flags; 922 if ((ret > 0) && 923 (msg.msg_controllen > 0) && 924 (infotype != NULL) && 925 (infolen != NULL) && 926 (*infolen > 0)) { 927 rcvinfo = NULL; 928 nxtinfo = NULL; 929 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { 930 if (cmsg->cmsg_level != IPPROTO_SCTP) { 931 continue; 932 } 933 if (cmsg->cmsg_type == SCTP_RCVINFO) { 934 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg); 935 if (nxtinfo != NULL) { 936 break; 937 } else { 938 continue; 939 } 940 } 941 if (cmsg->cmsg_type == SCTP_NXTINFO) { 942 nxtinfo = (struct sctp_nxtinfo *)CMSG_DATA(cmsg); 943 if (rcvinfo != NULL) { 944 break; 945 } else { 946 continue; 947 } 948 } 949 } 950 if (rcvinfo != NULL) { 951 if ((nxtinfo != NULL) && (*infolen >= sizeof(struct sctp_recvv_rn))) { 952 struct sctp_recvv_rn *rn_info; 953 954 rn_info = (struct sctp_recvv_rn *)info; 955 rn_info->recvv_rcvinfo = *rcvinfo; 956 rn_info->recvv_nxtinfo = *nxtinfo; 957 *infolen = (socklen_t)sizeof(struct sctp_recvv_rn); 958 *infotype = SCTP_RECVV_RN; 959 } else if (*infolen >= sizeof(struct sctp_rcvinfo)) { 960 memcpy(info, rcvinfo, sizeof(struct sctp_rcvinfo)); 961 *infolen = (socklen_t)sizeof(struct sctp_rcvinfo); 962 *infotype = SCTP_RECVV_RCVINFO; 963 } 964 } else if (nxtinfo != NULL) { 965 if (*infolen >= sizeof(struct sctp_nxtinfo)) { 966 memcpy(info, nxtinfo, sizeof(struct sctp_nxtinfo)); 967 *infolen = (socklen_t)sizeof(struct sctp_nxtinfo); 968 *infotype = SCTP_RECVV_NXTINFO; 969 } 970 } 971 } 972 return (ret); 973 } 974 975 ssize_t 976 sctp_sendv(int sd, 977 const struct iovec *iov, int iovcnt, 978 struct sockaddr *addrs, int addrcnt, 979 void *info, socklen_t infolen, unsigned int infotype, 980 int flags) 981 { 982 ssize_t ret; 983 int i; 984 socklen_t addr_len; 985 struct msghdr msg; 986 in_port_t port; 987 struct sctp_sendv_spa *spa_info; 988 struct cmsghdr *cmsg; 989 char *cmsgbuf; 990 struct sockaddr *addr; 991 struct sockaddr_in *addr_in; 992 struct sockaddr_in6 *addr_in6; 993 sctp_assoc_t *assoc_id; 994 995 if ((addrcnt < 0) || 996 (iovcnt < 0) || 997 ((addrs == NULL) && (addrcnt > 0)) || 998 ((addrs != NULL) && (addrcnt == 0)) || 999 ((iov == NULL) && (iovcnt > 0)) || 1000 ((iov != NULL) && (iovcnt == 0))) { 1001 errno = EINVAL; 1002 return (-1); 1003 } 1004 cmsgbuf = malloc(CMSG_SPACE(sizeof(struct sctp_sndinfo)) + 1005 CMSG_SPACE(sizeof(struct sctp_prinfo)) + 1006 CMSG_SPACE(sizeof(struct sctp_authinfo)) + 1007 (size_t)addrcnt * CMSG_SPACE(sizeof(struct in6_addr))); 1008 if (cmsgbuf == NULL) { 1009 errno = ENOMEM; 1010 return (-1); 1011 } 1012 assoc_id = NULL; 1013 msg.msg_control = cmsgbuf; 1014 msg.msg_controllen = 0; 1015 cmsg = (struct cmsghdr *)cmsgbuf; 1016 switch (infotype) { 1017 case SCTP_SENDV_NOINFO: 1018 if ((infolen != 0) || (info != NULL)) { 1019 free(cmsgbuf); 1020 errno = EINVAL; 1021 return (-1); 1022 } 1023 break; 1024 case SCTP_SENDV_SNDINFO: 1025 if ((info == NULL) || (infolen < sizeof(struct sctp_sndinfo))) { 1026 free(cmsgbuf); 1027 errno = EINVAL; 1028 return (-1); 1029 } 1030 cmsg->cmsg_level = IPPROTO_SCTP; 1031 cmsg->cmsg_type = SCTP_SNDINFO; 1032 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo)); 1033 memcpy(CMSG_DATA(cmsg), info, sizeof(struct sctp_sndinfo)); 1034 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo)); 1035 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_sndinfo))); 1036 assoc_id = &(((struct sctp_sndinfo *)info)->snd_assoc_id); 1037 break; 1038 case SCTP_SENDV_PRINFO: 1039 if ((info == NULL) || (infolen < sizeof(struct sctp_prinfo))) { 1040 free(cmsgbuf); 1041 errno = EINVAL; 1042 return (-1); 1043 } 1044 cmsg->cmsg_level = IPPROTO_SCTP; 1045 cmsg->cmsg_type = SCTP_PRINFO; 1046 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo)); 1047 memcpy(CMSG_DATA(cmsg), info, sizeof(struct sctp_prinfo)); 1048 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo)); 1049 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_prinfo))); 1050 break; 1051 case SCTP_SENDV_AUTHINFO: 1052 if ((info == NULL) || (infolen < sizeof(struct sctp_authinfo))) { 1053 free(cmsgbuf); 1054 errno = EINVAL; 1055 return (-1); 1056 } 1057 cmsg->cmsg_level = IPPROTO_SCTP; 1058 cmsg->cmsg_type = SCTP_AUTHINFO; 1059 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_authinfo)); 1060 memcpy(CMSG_DATA(cmsg), info, sizeof(struct sctp_authinfo)); 1061 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_authinfo)); 1062 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_authinfo))); 1063 break; 1064 case SCTP_SENDV_SPA: 1065 if ((info == NULL) || (infolen < sizeof(struct sctp_sendv_spa))) { 1066 free(cmsgbuf); 1067 errno = EINVAL; 1068 return (-1); 1069 } 1070 spa_info = (struct sctp_sendv_spa *)info; 1071 if (spa_info->sendv_flags & SCTP_SEND_SNDINFO_VALID) { 1072 cmsg->cmsg_level = IPPROTO_SCTP; 1073 cmsg->cmsg_type = SCTP_SNDINFO; 1074 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo)); 1075 memcpy(CMSG_DATA(cmsg), &spa_info->sendv_sndinfo, sizeof(struct sctp_sndinfo)); 1076 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo)); 1077 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_sndinfo))); 1078 assoc_id = &(spa_info->sendv_sndinfo.snd_assoc_id); 1079 } 1080 if (spa_info->sendv_flags & SCTP_SEND_PRINFO_VALID) { 1081 cmsg->cmsg_level = IPPROTO_SCTP; 1082 cmsg->cmsg_type = SCTP_PRINFO; 1083 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo)); 1084 memcpy(CMSG_DATA(cmsg), &spa_info->sendv_prinfo, sizeof(struct sctp_prinfo)); 1085 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo)); 1086 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_prinfo))); 1087 } 1088 if (spa_info->sendv_flags & SCTP_SEND_AUTHINFO_VALID) { 1089 cmsg->cmsg_level = IPPROTO_SCTP; 1090 cmsg->cmsg_type = SCTP_AUTHINFO; 1091 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_authinfo)); 1092 memcpy(CMSG_DATA(cmsg), &spa_info->sendv_authinfo, sizeof(struct sctp_authinfo)); 1093 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_authinfo)); 1094 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_authinfo))); 1095 } 1096 break; 1097 default: 1098 free(cmsgbuf); 1099 errno = EINVAL; 1100 return (-1); 1101 } 1102 addr = addrs; 1103 msg.msg_name = NULL; 1104 msg.msg_namelen = 0; 1105 1106 for (i = 0; i < addrcnt; i++) { 1107 switch (addr->sa_family) { 1108 case AF_INET: 1109 addr_len = (socklen_t)sizeof(struct sockaddr_in); 1110 addr_in = (struct sockaddr_in *)addr; 1111 if (addr_in->sin_len != addr_len) { 1112 free(cmsgbuf); 1113 errno = EINVAL; 1114 return (-1); 1115 } 1116 if (i == 0) { 1117 port = addr_in->sin_port; 1118 } else { 1119 if (port == addr_in->sin_port) { 1120 cmsg->cmsg_level = IPPROTO_SCTP; 1121 cmsg->cmsg_type = SCTP_DSTADDRV4; 1122 cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_addr)); 1123 memcpy(CMSG_DATA(cmsg), &addr_in->sin_addr, sizeof(struct in_addr)); 1124 msg.msg_controllen += CMSG_SPACE(sizeof(struct in_addr)); 1125 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct in_addr))); 1126 } else { 1127 free(cmsgbuf); 1128 errno = EINVAL; 1129 return (-1); 1130 } 1131 } 1132 break; 1133 case AF_INET6: 1134 addr_len = (socklen_t)sizeof(struct sockaddr_in6); 1135 addr_in6 = (struct sockaddr_in6 *)addr; 1136 if (addr_in6->sin6_len != addr_len) { 1137 free(cmsgbuf); 1138 errno = EINVAL; 1139 return (-1); 1140 } 1141 if (i == 0) { 1142 port = addr_in6->sin6_port; 1143 } else { 1144 if (port == addr_in6->sin6_port) { 1145 cmsg->cmsg_level = IPPROTO_SCTP; 1146 cmsg->cmsg_type = SCTP_DSTADDRV6; 1147 cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_addr)); 1148 memcpy(CMSG_DATA(cmsg), &addr_in6->sin6_addr, sizeof(struct in6_addr)); 1149 msg.msg_controllen += CMSG_SPACE(sizeof(struct in6_addr)); 1150 cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct in6_addr))); 1151 } else { 1152 free(cmsgbuf); 1153 errno = EINVAL; 1154 return (-1); 1155 } 1156 } 1157 break; 1158 default: 1159 free(cmsgbuf); 1160 errno = EINVAL; 1161 return (-1); 1162 } 1163 if (i == 0) { 1164 msg.msg_name = addr; 1165 msg.msg_namelen = addr_len; 1166 } 1167 addr = (struct sockaddr *)((caddr_t)addr + addr_len); 1168 } 1169 if (msg.msg_controllen == 0) { 1170 msg.msg_control = NULL; 1171 } 1172 msg.msg_iov = (struct iovec *)iov; 1173 msg.msg_iovlen = iovcnt; 1174 msg.msg_flags = 0; 1175 ret = sendmsg(sd, &msg, flags); 1176 free(cmsgbuf); 1177 if ((ret >= 0) && (addrs != NULL) && (assoc_id != NULL)) { 1178 *assoc_id = sctp_getassocid(sd, addrs); 1179 } 1180 return (ret); 1181 } 1182 1183 1184 #if !defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) 1185 1186 int 1187 sctp_peeloff(int sd, sctp_assoc_t assoc_id) 1188 { 1189 /* NOT supported, return invalid sd */ 1190 errno = ENOTSUP; 1191 return (-1); 1192 } 1193 1194 #endif 1195 #if defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) 1196 int 1197 sctp_peeloff(int sd, sctp_assoc_t assoc_id) 1198 { 1199 return (syscall(SYS_sctp_peeloff, sd, assoc_id)); 1200 } 1201 1202 #endif 1203 1204 #undef SCTP_CONTROL_VEC_SIZE_RCV 1205