1 /* $KAME: sctp_sys_calls.c,v 1.9 2004/08/17 06:08:53 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 2002-2006 Cisco Systems Inc, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 #include <stdio.h> 34 #include <string.h> 35 #include <errno.h> 36 #include <stdlib.h> 37 #include <unistd.h> 38 #include <sys/types.h> 39 #include <sys/socket.h> 40 #include <sys/errno.h> 41 #include <sys/syscall.h> 42 #include <sys/uio.h> 43 #include <netinet/in.h> 44 #include <arpa/inet.h> 45 #include <netinet/sctp_uio.h> 46 #include <netinet/sctp.h> 47 48 #include <net/if_dl.h> 49 50 #ifndef IN6_IS_ADDR_V4MAPPED 51 #define IN6_IS_ADDR_V4MAPPED(a) \ 52 ((*(const u_int32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \ 53 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \ 54 (*(const u_int32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff))) 55 #endif 56 57 58 #define SCTP_CONTROL_VEC_SIZE_SND 8192 59 #define SCTP_CONTROL_VEC_SIZE_RCV 16384 60 #define SCTP_STACK_BUF_SIZE 2048 61 #define SCTP_SMALL_IOVEC_SIZE 2 62 63 #ifdef SCTP_DEBUG_PRINT_ADDRESS 64 65 #define SCTP_STRING_BUF_SZ 256 66 67 static void 68 SCTPPrintAnAddress(struct sockaddr *a) 69 { 70 char stringToPrint[SCTP_STRING_BUF_SZ]; 71 u_short prt; 72 char *srcaddr, *txt; 73 74 if (a == NULL) { 75 printf("NULL\n"); 76 return; 77 } 78 if (a->sa_family == AF_INET) { 79 srcaddr = (char *)&((struct sockaddr_in *)a)->sin_addr; 80 txt = "IPv4 Address: "; 81 prt = ntohs(((struct sockaddr_in *)a)->sin_port); 82 } else if (a->sa_family == AF_INET6) { 83 srcaddr = (char *)&((struct sockaddr_in6 *)a)->sin6_addr; 84 prt = ntohs(((struct sockaddr_in6 *)a)->sin6_port); 85 txt = "IPv6 Address: "; 86 } else if (a->sa_family == AF_LINK) { 87 int i; 88 char tbuf[SCTP_STRING_BUF_SZ]; 89 u_char adbuf[SCTP_STRING_BUF_SZ]; 90 struct sockaddr_dl *dl; 91 92 dl = (struct sockaddr_dl *)a; 93 strncpy(tbuf, dl->sdl_data, dl->sdl_nlen); 94 tbuf[dl->sdl_nlen] = 0; 95 printf("Intf:%s (len:%d)Interface index:%d type:%x(%d) ll-len:%d ", 96 tbuf, 97 dl->sdl_nlen, 98 dl->sdl_index, 99 dl->sdl_type, 100 dl->sdl_type, 101 dl->sdl_alen 102 ); 103 memcpy(adbuf, LLADDR(dl), dl->sdl_alen); 104 for (i = 0; i < dl->sdl_alen; i++) { 105 printf("%2.2x", adbuf[i]); 106 if (i < (dl->sdl_alen - 1)) 107 printf(":"); 108 } 109 printf("\n"); 110 return; 111 } else { 112 return; 113 } 114 if (inet_ntop(a->sa_family, srcaddr, stringToPrint, sizeof(stringToPrint))) { 115 if (a->sa_family == AF_INET6) { 116 printf("%s%s:%d scope:%d\n", 117 txt, stringToPrint, prt, 118 ((struct sockaddr_in6 *)a)->sin6_scope_id); 119 } else { 120 printf("%s%s:%d\n", txt, stringToPrint, prt); 121 } 122 123 } else { 124 printf("%s unprintable?\n", txt); 125 } 126 } 127 128 #endif /* SCTP_DEBUG_PRINT_ADDRESS */ 129 130 static void 131 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 132 { 133 bzero(sin, sizeof(*sin)); 134 sin->sin_len = sizeof(struct sockaddr_in); 135 sin->sin_family = AF_INET; 136 sin->sin_port = sin6->sin6_port; 137 sin->sin_addr.s_addr = sin6->sin6_addr.__u6_addr.__u6_addr32[3]; 138 } 139 140 int 141 sctp_getaddrlen(sa_family_t family) 142 { 143 int error, sd; 144 socklen_t siz; 145 struct sctp_assoc_value av; 146 147 av.assoc_value = family; 148 siz = sizeof(av); 149 #if defined(AF_INET) 150 sd = socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP); 151 #elif defined(AF_INET6) 152 sd = socket(AF_INET6, SOCK_SEQPACKET, IPPROTO_SCTP); 153 #endif 154 if (sd == -1) { 155 return (errno); 156 } 157 error = getsockopt(sd, IPPROTO_SCTP, SCTP_GET_ADDR_LEN, &av, &siz); 158 close(sd); 159 if (error == 0) { 160 return ((int)av.assoc_value); 161 } else { 162 return (error); 163 } 164 } 165 166 int 167 sctp_connectx(int sd, const struct sockaddr *addrs, int addrcnt, sctp_assoc_t * id) 168 { 169 char buf[SCTP_STACK_BUF_SIZE]; 170 int i, ret, cnt, *aa; 171 char *cpto; 172 const struct sockaddr *at; 173 size_t len = sizeof(int); 174 sctp_assoc_t *p_id; 175 176 at = addrs; 177 cnt = 0; 178 cpto = ((caddr_t)buf + sizeof(int)); 179 /* validate all the addresses and get the size */ 180 for (i = 0; i < addrcnt; i++) { 181 if (at->sa_family == AF_INET) { 182 memcpy(cpto, at, at->sa_len); 183 cpto = ((caddr_t)cpto + at->sa_len); 184 len += at->sa_len; 185 } else if (at->sa_family == AF_INET6) { 186 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)at)->sin6_addr)) { 187 len += sizeof(struct sockaddr_in); 188 in6_sin6_2_sin((struct sockaddr_in *)cpto, (struct sockaddr_in6 *)at); 189 cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in)); 190 len += sizeof(struct sockaddr_in); 191 } else { 192 memcpy(cpto, at, at->sa_len); 193 cpto = ((caddr_t)cpto + at->sa_len); 194 len += at->sa_len; 195 } 196 } else { 197 errno = EINVAL; 198 return (-1); 199 } 200 if (len > (sizeof(buf) - sizeof(int))) { 201 /* Never enough memory */ 202 return (E2BIG); 203 } 204 at = (struct sockaddr *)((caddr_t)at + at->sa_len); 205 cnt++; 206 } 207 /* do we have any? */ 208 if (cnt == 0) { 209 errno = EINVAL; 210 return (-1); 211 } 212 aa = (int *)buf; 213 *aa = cnt; 214 ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X, (void *)buf, 215 (socklen_t) len); 216 if ((ret == 0) && id) { 217 p_id = (sctp_assoc_t *) buf; 218 *id = *p_id; 219 } 220 return (ret); 221 } 222 223 int 224 sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, int flags) 225 { 226 struct sctp_getaddresses *gaddrs; 227 struct sockaddr *sa; 228 int i, sz, fam, argsz; 229 230 if ((flags != SCTP_BINDX_ADD_ADDR) && 231 (flags != SCTP_BINDX_REM_ADDR)) { 232 errno = EFAULT; 233 return (-1); 234 } 235 argsz = (sizeof(struct sockaddr_storage) + 236 sizeof(struct sctp_getaddresses)); 237 gaddrs = (struct sctp_getaddresses *)calloc(1, argsz); 238 if (gaddrs == NULL) { 239 errno = ENOMEM; 240 return (-1); 241 } 242 gaddrs->sget_assoc_id = 0; 243 sa = addrs; 244 for (i = 0; i < addrcnt; i++) { 245 sz = sa->sa_len; 246 fam = sa->sa_family; 247 ((struct sockaddr_in *)&addrs[i])->sin_port = ((struct sockaddr_in *)sa)->sin_port; 248 if ((fam != AF_INET) && (fam != AF_INET6)) { 249 errno = EINVAL; 250 return (-1); 251 } 252 memcpy(gaddrs->addr, sa, sz); 253 if (setsockopt(sd, IPPROTO_SCTP, flags, 254 gaddrs, (socklen_t) argsz) != 0) { 255 free(gaddrs); 256 return (-1); 257 } 258 memset(gaddrs, 0, argsz); 259 sa = (struct sockaddr *)((caddr_t)sa + sz); 260 } 261 free(gaddrs); 262 return (0); 263 } 264 265 266 int 267 sctp_opt_info(int sd, sctp_assoc_t id, int opt, void *arg, socklen_t * size) 268 { 269 if (arg == NULL) { 270 return (EINVAL); 271 } 272 *(sctp_assoc_t *) arg = id; 273 return (getsockopt(sd, IPPROTO_SCTP, opt, arg, size)); 274 } 275 276 int 277 sctp_getpaddrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) 278 { 279 struct sctp_getaddresses *addrs; 280 struct sockaddr *sa; 281 struct sockaddr *re; 282 sctp_assoc_t asoc; 283 caddr_t lim; 284 socklen_t siz; 285 int cnt; 286 287 if (raddrs == NULL) { 288 errno = EFAULT; 289 return (-1); 290 } 291 asoc = id; 292 siz = sizeof(sctp_assoc_t); 293 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_REMOTE_ADDR_SIZE, 294 &asoc, &siz) != 0) { 295 errno = ENOMEM; 296 return (-1); 297 } 298 /* size required is returned in 'asoc' */ 299 siz = (size_t)asoc; 300 siz += sizeof(struct sctp_getaddresses); 301 addrs = calloc(1, siz); 302 if (addrs == NULL) { 303 errno = ENOMEM; 304 return (-1); 305 } 306 memset(addrs, 0, siz); 307 addrs->sget_assoc_id = id; 308 /* Now lets get the array of addresses */ 309 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_PEER_ADDRESSES, 310 addrs, &siz) != 0) { 311 free(addrs); 312 errno = ENOMEM; 313 return (-1); 314 } 315 re = (struct sockaddr *)&addrs->addr[0]; 316 *raddrs = re; 317 cnt = 0; 318 sa = (struct sockaddr *)&addrs->addr[0]; 319 lim = (caddr_t)addrs + siz; 320 while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { 321 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 322 cnt++; 323 } 324 return (cnt); 325 } 326 327 void 328 sctp_freepaddrs(struct sockaddr *addrs) 329 { 330 /* Take away the hidden association id */ 331 void *fr_addr; 332 333 fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); 334 /* Now free it */ 335 free(fr_addr); 336 } 337 338 int 339 sctp_getladdrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) 340 { 341 struct sctp_getaddresses *addrs; 342 struct sockaddr *re; 343 caddr_t lim; 344 struct sockaddr *sa; 345 int size_of_addresses; 346 socklen_t siz; 347 int cnt; 348 349 if (raddrs == NULL) { 350 errno = EFAULT; 351 return (-1); 352 } 353 size_of_addresses = 0; 354 siz = sizeof(int); 355 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDR_SIZE, 356 &size_of_addresses, &siz) != 0) { 357 errno = ENOMEM; 358 return (-1); 359 } 360 if (size_of_addresses == 0) { 361 errno = ENOTCONN; 362 return (-1); 363 } 364 siz = size_of_addresses + sizeof(struct sockaddr_storage); 365 siz += sizeof(struct sctp_getaddresses); 366 addrs = calloc(1, siz); 367 if (addrs == NULL) { 368 errno = ENOMEM; 369 return (-1); 370 } 371 memset(addrs, 0, siz); 372 addrs->sget_assoc_id = id; 373 /* Now lets get the array of addresses */ 374 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDRESSES, addrs, 375 &siz) != 0) { 376 free(addrs); 377 errno = ENOMEM; 378 return (-1); 379 } 380 re = (struct sockaddr *)&addrs->addr[0]; 381 *raddrs = re; 382 cnt = 0; 383 sa = (struct sockaddr *)&addrs->addr[0]; 384 lim = (caddr_t)addrs + siz; 385 while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { 386 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 387 cnt++; 388 } 389 return (cnt); 390 } 391 392 void 393 sctp_freeladdrs(struct sockaddr *addrs) 394 { 395 /* Take away the hidden association id */ 396 void *fr_addr; 397 398 fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); 399 /* Now free it */ 400 free(fr_addr); 401 } 402 403 404 ssize_t 405 sctp_sendmsg(int s, 406 const void *data, 407 size_t len, 408 const struct sockaddr *to, 409 socklen_t tolen, 410 u_int32_t ppid, 411 u_int32_t flags, 412 u_int16_t stream_no, 413 u_int32_t timetolive, 414 u_int32_t context) 415 { 416 #ifdef SYS_sctp_generic_sendmsg 417 struct sctp_sndrcvinfo sinfo; 418 419 sinfo.sinfo_ppid = ppid; 420 sinfo.sinfo_flags = flags; 421 sinfo.sinfo_stream = stream_no; 422 sinfo.sinfo_timetolive = timetolive; 423 sinfo.sinfo_context = context; 424 sinfo.sinfo_assoc_id = 0; 425 return (syscall(SYS_sctp_generic_sendmsg, s, 426 data, len, to, tolen, &sinfo, 0)); 427 #else 428 429 ssize_t sz; 430 struct msghdr msg; 431 struct sctp_sndrcvinfo *s_info; 432 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 433 char controlVector[SCTP_CONTROL_VEC_SIZE_RCV]; 434 struct cmsghdr *cmsg; 435 struct sockaddr *who = NULL; 436 union { 437 struct sockaddr_in in; 438 struct sockaddr_in6 in6; 439 } addr; 440 441 /* 442 fprintf(io, "sctp_sendmsg(sd:%d, data:%x, len:%d, to:%x, tolen:%d, ppid:%x, flags:%x str:%d ttl:%d ctx:%x\n", 443 s, 444 (u_int)data, 445 (int)len, 446 (u_int)to, 447 (int)tolen, 448 ppid, flags, 449 (int)stream_no, 450 (int)timetolive, 451 (u_int)context); 452 fflush(io); 453 */ 454 if ((tolen > 0) && ((to == NULL) || (tolen < sizeof(struct sockaddr)))) { 455 errno = EINVAL; 456 return -1; 457 } 458 if (to && (tolen > 0)) { 459 if (to->sa_family == AF_INET) { 460 if (tolen != sizeof(struct sockaddr_in)) { 461 errno = EINVAL; 462 return -1; 463 } 464 if ((to->sa_len > 0) && (to->sa_len != sizeof(struct sockaddr_in))) { 465 errno = EINVAL; 466 return -1; 467 } 468 memcpy(&addr, to, sizeof(struct sockaddr_in)); 469 addr.in.sin_len = sizeof(struct sockaddr_in); 470 } else if (to->sa_family == AF_INET6) { 471 if (tolen != sizeof(struct sockaddr_in6)) { 472 errno = EINVAL; 473 return -1; 474 } 475 if ((to->sa_len > 0) && (to->sa_len != sizeof(struct sockaddr_in6))) { 476 errno = EINVAL; 477 return -1; 478 } 479 memcpy(&addr, to, sizeof(struct sockaddr_in6)); 480 addr.in6.sin6_len = sizeof(struct sockaddr_in6); 481 } else { 482 errno = EAFNOSUPPORT; 483 return -1; 484 } 485 who = (struct sockaddr *)&addr; 486 } 487 iov[0].iov_base = (char *)data; 488 iov[0].iov_len = len; 489 iov[1].iov_base = NULL; 490 iov[1].iov_len = 0; 491 492 if (who) { 493 msg.msg_name = (caddr_t)who; 494 msg.msg_namelen = who->sa_len; 495 } else { 496 msg.msg_name = (caddr_t)NULL; 497 msg.msg_namelen = 0; 498 } 499 msg.msg_iov = iov; 500 msg.msg_iovlen = 1; 501 msg.msg_control = (caddr_t)controlVector; 502 503 cmsg = (struct cmsghdr *)controlVector; 504 505 cmsg->cmsg_level = IPPROTO_SCTP; 506 cmsg->cmsg_type = SCTP_SNDRCV; 507 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); 508 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 509 510 s_info->sinfo_stream = stream_no; 511 s_info->sinfo_ssn = 0; 512 s_info->sinfo_flags = flags; 513 s_info->sinfo_ppid = ppid; 514 s_info->sinfo_context = context; 515 s_info->sinfo_assoc_id = 0; 516 s_info->sinfo_timetolive = timetolive; 517 errno = 0; 518 msg.msg_controllen = cmsg->cmsg_len; 519 sz = sendmsg(s, &msg, 0); 520 return (sz); 521 #endif 522 } 523 524 525 sctp_assoc_t 526 sctp_getassocid(int sd, struct sockaddr *sa) 527 { 528 struct sctp_paddrparams sp; 529 socklen_t siz; 530 531 /* First get the assoc id */ 532 siz = sizeof(struct sctp_paddrparams); 533 memset(&sp, 0, sizeof(sp)); 534 memcpy((caddr_t)&sp.spp_address, sa, sa->sa_len); 535 errno = 0; 536 if (getsockopt(sd, IPPROTO_SCTP, 537 SCTP_PEER_ADDR_PARAMS, &sp, &siz) != 0) { 538 return ((sctp_assoc_t) 0); 539 } 540 /* We depend on the fact that 0 can never be returned */ 541 return (sp.spp_assoc_id); 542 } 543 544 ssize_t 545 sctp_send(int sd, const void *data, size_t len, 546 const struct sctp_sndrcvinfo *sinfo, 547 int flags) 548 { 549 550 #ifdef SYS_sctp_generic_sendmsg 551 struct sockaddr *to = NULL; 552 553 return (syscall(SYS_sctp_generic_sendmsg, sd, 554 data, len, to, 0, sinfo, flags)); 555 #else 556 ssize_t sz; 557 struct msghdr msg; 558 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 559 struct sctp_sndrcvinfo *s_info; 560 char controlVector[SCTP_CONTROL_VEC_SIZE_SND]; 561 struct cmsghdr *cmsg; 562 563 if (sinfo == NULL) { 564 return (EINVAL); 565 } 566 iov[0].iov_base = (char *)data; 567 iov[0].iov_len = len; 568 iov[1].iov_base = NULL; 569 iov[1].iov_len = 0; 570 571 msg.msg_name = 0; 572 msg.msg_namelen = 0; 573 msg.msg_iov = iov; 574 msg.msg_iovlen = 1; 575 msg.msg_control = (caddr_t)controlVector; 576 577 cmsg = (struct cmsghdr *)controlVector; 578 579 cmsg->cmsg_level = IPPROTO_SCTP; 580 cmsg->cmsg_type = SCTP_SNDRCV; 581 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); 582 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 583 /* copy in the data */ 584 *s_info = *sinfo; 585 errno = 0; 586 msg.msg_controllen = cmsg->cmsg_len; 587 sz = sendmsg(sd, &msg, flags); 588 return (sz); 589 #endif 590 } 591 592 593 594 ssize_t 595 sctp_sendx(int sd, const void *msg, size_t msg_len, 596 struct sockaddr *addrs, int addrcnt, 597 struct sctp_sndrcvinfo *sinfo, 598 int flags) 599 { 600 ssize_t ret; 601 int i, cnt, *aa, saved_errno; 602 char *buf; 603 int add_len, len, no_end_cx = 0; 604 struct sockaddr *at; 605 606 607 #ifdef SYS_sctp_generic_sendmsg 608 if (addrcnt < SCTP_SMALL_IOVEC_SIZE) { 609 socklen_t l; 610 611 /* 612 * Quick way, we don't need to do a connectx so lets use the 613 * syscall directly. 614 */ 615 l = addrs->sa_len; 616 return (syscall(SYS_sctp_generic_sendmsg, sd, 617 msg, msg_len, addrs, l, sinfo, flags)); 618 } 619 #endif 620 len = sizeof(int); 621 at = addrs; 622 cnt = 0; 623 /* validate all the addresses and get the size */ 624 for (i = 0; i < addrcnt; i++) { 625 if (at->sa_family == AF_INET) { 626 add_len = sizeof(struct sockaddr_in); 627 } else if (at->sa_family == AF_INET6) { 628 add_len = sizeof(struct sockaddr_in6); 629 } else { 630 errno = EINVAL; 631 return (-1); 632 } 633 len += add_len; 634 at = (struct sockaddr *)((caddr_t)at + add_len); 635 cnt++; 636 } 637 /* do we have any? */ 638 if (cnt == 0) { 639 errno = EINVAL; 640 return (-1); 641 } 642 buf = malloc(len); 643 if (buf == NULL) { 644 return (ENOMEM); 645 } 646 aa = (int *)buf; 647 *aa = cnt; 648 aa++; 649 memcpy((caddr_t)aa, addrs, (len - sizeof(int))); 650 ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_DELAYED, (void *)buf, 651 (socklen_t) len); 652 653 free(buf); 654 if (ret != 0) { 655 if (errno == EALREADY) { 656 no_end_cx = 1;; 657 goto continue_send; 658 } 659 return (ret); 660 } 661 continue_send: 662 sinfo->sinfo_assoc_id = sctp_getassocid(sd, addrs); 663 if (sinfo->sinfo_assoc_id == 0) { 664 printf("Huh, can't get associd? TSNH!\n"); 665 (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, 666 (socklen_t) addrs->sa_len); 667 errno = ENOENT; 668 return (-1); 669 } 670 ret = sctp_send(sd, msg, msg_len, sinfo, flags); 671 saved_errno = errno; 672 if (no_end_cx == 0) 673 (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, 674 (socklen_t) addrs->sa_len); 675 676 errno = saved_errno; 677 return (ret); 678 } 679 680 ssize_t 681 sctp_sendmsgx(int sd, 682 const void *msg, 683 size_t len, 684 struct sockaddr *addrs, 685 int addrcnt, 686 u_int32_t ppid, 687 u_int32_t flags, 688 u_int16_t stream_no, 689 u_int32_t timetolive, 690 u_int32_t context) 691 { 692 struct sctp_sndrcvinfo sinfo; 693 694 memset((void *)&sinfo, 0, sizeof(struct sctp_sndrcvinfo)); 695 sinfo.sinfo_ppid = ppid; 696 sinfo.sinfo_flags = flags; 697 sinfo.sinfo_ssn = stream_no; 698 sinfo.sinfo_timetolive = timetolive; 699 sinfo.sinfo_context = context; 700 return sctp_sendx(sd, msg, len, addrs, addrcnt, &sinfo, 0); 701 } 702 703 ssize_t 704 sctp_recvmsg(int s, 705 void *dbuf, 706 size_t len, 707 struct sockaddr *from, 708 socklen_t * fromlen, 709 struct sctp_sndrcvinfo *sinfo, 710 int *msg_flags) 711 { 712 713 #ifdef SYS_sctp_generic_recvmsg 714 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 715 716 iov[0].iov_base = dbuf; 717 iov[0].iov_len = len; 718 return (syscall(SYS_sctp_generic_recvmsg, s, 719 iov, 1, from, fromlen, sinfo, msg_flags)); 720 #else 721 struct sctp_sndrcvinfo *s_info; 722 ssize_t sz; 723 int sinfo_found = 0; 724 struct msghdr msg; 725 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 726 char controlVector[SCTP_CONTROL_VEC_SIZE_RCV]; 727 struct cmsghdr *cmsg; 728 729 if (msg_flags == NULL) { 730 errno = EINVAL; 731 return (-1); 732 } 733 msg.msg_flags = 0; 734 iov[0].iov_base = dbuf; 735 iov[0].iov_len = len; 736 iov[1].iov_base = NULL; 737 iov[1].iov_len = 0; 738 msg.msg_name = (caddr_t)from; 739 if (fromlen == NULL) 740 msg.msg_namelen = 0; 741 else 742 msg.msg_namelen = *fromlen; 743 msg.msg_iov = iov; 744 msg.msg_iovlen = 1; 745 msg.msg_control = (caddr_t)controlVector; 746 msg.msg_controllen = sizeof(controlVector); 747 errno = 0; 748 sz = recvmsg(s, &msg, 0); 749 if (sz <= 0) 750 return (sz); 751 752 s_info = NULL; 753 len = sz; 754 *msg_flags = msg.msg_flags; 755 if (sinfo) 756 sinfo->sinfo_assoc_id = 0; 757 758 if ((msg.msg_controllen) && sinfo) { 759 /* 760 * parse through and see if we find the sctp_sndrcvinfo (if 761 * the user wants it). 762 */ 763 cmsg = (struct cmsghdr *)controlVector; 764 while (cmsg) { 765 if ((cmsg->cmsg_len == 0) || (cmsg->cmsg_len > msg.msg_controllen)) { 766 break; 767 } 768 if (cmsg->cmsg_level == IPPROTO_SCTP) { 769 if (cmsg->cmsg_type == SCTP_SNDRCV) { 770 /* Got it */ 771 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 772 /* Copy it to the user */ 773 if (sinfo) 774 *sinfo = *s_info; 775 sinfo_found = 1; 776 break; 777 } else if (cmsg->cmsg_type == SCTP_EXTRCV) { 778 /* 779 * Got it, presumably the user has 780 * asked for this extra info, so the 781 * structure holds more room :-D 782 */ 783 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 784 /* Copy it to the user */ 785 if (sinfo) { 786 memcpy(sinfo, s_info, sizeof(struct sctp_extrcvinfo)); 787 } 788 sinfo_found = 1; 789 break; 790 791 } 792 } 793 cmsg = CMSG_NXTHDR(&msg, cmsg); 794 } 795 } 796 return (sz); 797 #endif 798 } 799 800 801 #if defined(HAVE_SCTP_PEELOFF_SOCKOPT) 802 #include <netinet/sctp_peeloff.h> 803 804 int 805 sctp_peeloff(int sd, sctp_assoc_t assoc_id) 806 { 807 struct sctp_peeloff_opt peeloff; 808 int error; 809 socklen_t optlen; 810 811 /* set in the socket option params */ 812 memset(&peeloff, 0, sizeof(peeloff)); 813 peeloff.s = sd; 814 peeloff.assoc_id = assoc_id; 815 optlen = sizeof(peeloff); 816 error = getsockopt(sd, IPPROTO_SCTP, SCTP_PEELOFF, (void *)&peeloff, 817 &optlen); 818 if (error) { 819 errno = error; 820 return (-1); 821 } else { 822 return (peeloff.new_sd); 823 } 824 } 825 826 #endif 827 828 #if !defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) 829 830 int 831 sctp_peeloff(int sd, sctp_assoc_t assoc_id) 832 { 833 /* NOT supported, return invalid sd */ 834 errno = ENOTSUP; 835 return (-1); 836 } 837 838 #endif 839 #if defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) 840 int 841 sctp_peeloff(int sd, sctp_assoc_t assoc_id) 842 { 843 return (syscall(SYS_sctp_peeloff, sd, assoc_id)); 844 } 845 846 #endif 847 848 849 #undef SCTP_CONTROL_VEC_SIZE_SND 850 #undef SCTP_CONTROL_VEC_SIZE_RCV 851 #undef SCTP_STACK_BUF_SIZE 852 #undef SCTP_SMALL_IOVEC_SIZE 853