sctp_sys_calls.c revision 171572
1/* $KAME: sctp_sys_calls.c,v 1.9 2004/08/17 06:08:53 itojun Exp $ */ 2 3/* 4 * Copyright (C) 2002-2007 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: head/lib/libc/net/sctp_sys_calls.c 171572 2007-07-24 20:06:02Z rrs $"); 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 67static void 68SCTPPrintAnAddress(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 130static void 131in6_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 140int 141sctp_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 (-1); 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 (-1); 163 } 164} 165 166int 167sctp_connectx(int sd, const struct sockaddr *addrs, int addrcnt, 168 sctp_assoc_t * id) 169{ 170 char buf[SCTP_STACK_BUF_SIZE]; 171 int i, ret, cnt, *aa; 172 char *cpto; 173 const struct sockaddr *at; 174 sctp_assoc_t *p_id; 175 size_t len = sizeof(int); 176 177 /* validate the address count and list */ 178 if ((addrs == NULL) || (addrcnt <= 0)) { 179 errno = EINVAL; 180 return (-1); 181 } 182 at = addrs; 183 cnt = 0; 184 cpto = ((caddr_t)buf + sizeof(int)); 185 /* validate all the addresses and get the size */ 186 for (i = 0; i < addrcnt; i++) { 187 if (at->sa_family == AF_INET) { 188 if (at->sa_len != sizeof(struct sockaddr_in)) { 189 errno = EINVAL; 190 return (-1); 191 } 192 memcpy(cpto, at, at->sa_len); 193 cpto = ((caddr_t)cpto + at->sa_len); 194 len += at->sa_len; 195 } else if (at->sa_family == AF_INET6) { 196 if (at->sa_len != sizeof(struct sockaddr_in6)) { 197 errno = EINVAL; 198 return (-1); 199 } 200 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)at)->sin6_addr)) { 201 len += sizeof(struct sockaddr_in); 202 in6_sin6_2_sin((struct sockaddr_in *)cpto, (struct sockaddr_in6 *)at); 203 cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in)); 204 len += sizeof(struct sockaddr_in); 205 } else { 206 memcpy(cpto, at, at->sa_len); 207 cpto = ((caddr_t)cpto + at->sa_len); 208 len += at->sa_len; 209 } 210 } else { 211 errno = EINVAL; 212 return (-1); 213 } 214 if (len > (sizeof(buf) - sizeof(int))) { 215 /* Never enough memory */ 216 errno = E2BIG; 217 return (-1); 218 } 219 at = (struct sockaddr *)((caddr_t)at + at->sa_len); 220 cnt++; 221 } 222 /* do we have any? */ 223 if (cnt == 0) { 224 errno = EINVAL; 225 return (-1); 226 } 227 aa = (int *)buf; 228 *aa = cnt; 229 ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X, (void *)buf, 230 (socklen_t) len); 231 if ((ret == 0) && id) { 232 p_id = (sctp_assoc_t *) buf; 233 *id = *p_id; 234 } 235 return (ret); 236} 237 238int 239sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, int flags) 240{ 241 struct sctp_getaddresses *gaddrs; 242 struct sockaddr *sa; 243 struct sockaddr_in *sin; 244 struct sockaddr_in6 *sin6; 245 int i, sz, argsz; 246 uint16_t sport = 0; 247 248 /* validate the flags */ 249 if ((flags != SCTP_BINDX_ADD_ADDR) && 250 (flags != SCTP_BINDX_REM_ADDR)) { 251 errno = EFAULT; 252 return (-1); 253 } 254 /* validate the address count and list */ 255 if ((addrcnt <= 0) || (addrs == NULL)) { 256 errno = EINVAL; 257 return (-1); 258 } 259 argsz = (sizeof(struct sockaddr_storage) + 260 sizeof(struct sctp_getaddresses)); 261 gaddrs = (struct sctp_getaddresses *)calloc(1, argsz); 262 if (gaddrs == NULL) { 263 errno = ENOMEM; 264 return (-1); 265 } 266 /* First pre-screen the addresses */ 267 sa = addrs; 268 for (i = 0; i < addrcnt; i++) { 269 sz = sa->sa_len; 270 if (sa->sa_family == AF_INET) { 271 if (sa->sa_len != sizeof(struct sockaddr_in)) 272 goto out_error; 273 sin = (struct sockaddr_in *)sa; 274 if (sin->sin_port) { 275 /* non-zero port, check or save */ 276 if (sport) { 277 /* Check against our port */ 278 if (sport != sin->sin_port) { 279 goto out_error; 280 } 281 } else { 282 /* save off the port */ 283 sport = sin->sin_port; 284 } 285 } 286 } else if (sa->sa_family == AF_INET6) { 287 if (sa->sa_len != sizeof(struct sockaddr_in6)) 288 goto out_error; 289 sin6 = (struct sockaddr_in6 *)sa; 290 if (sin6->sin6_port) { 291 /* non-zero port, check or save */ 292 if (sport) { 293 /* Check against our port */ 294 if (sport != sin6->sin6_port) { 295 goto out_error; 296 } 297 } else { 298 /* save off the port */ 299 sport = sin6->sin6_port; 300 } 301 } 302 } else { 303 /* invalid address family specified */ 304 goto out_error; 305 } 306 307 308 } 309 sa = addrs; 310 /* 311 * Now if there was a port mentioned, assure that the first address 312 * has that port to make sure it fails or succeeds correctly. 313 */ 314 if (sport) { 315 sin = (struct sockaddr_in *)sa; 316 sin->sin_port = sport; 317 } 318 for (i = 0; i < addrcnt; i++) { 319 sz = sa->sa_len; 320 if (sa->sa_family == AF_INET) { 321 if (sa->sa_len != sizeof(struct sockaddr_in)) 322 goto out_error; 323 } else if (sa->sa_family == AF_INET6) { 324 if (sa->sa_len != sizeof(struct sockaddr_in6)) 325 goto out_error; 326 } else { 327 /* invalid address family specified */ 328 out_error: 329 free(gaddrs); 330 errno = EINVAL; 331 return (-1); 332 } 333 memset(gaddrs, 0, argsz); 334 gaddrs->sget_assoc_id = 0; 335 memcpy(gaddrs->addr, sa, sz); 336 if (setsockopt(sd, IPPROTO_SCTP, flags, gaddrs, 337 (socklen_t) argsz) != 0) { 338 free(gaddrs); 339 return (-1); 340 } 341 sa = (struct sockaddr *)((caddr_t)sa + sz); 342 } 343 free(gaddrs); 344 return (0); 345} 346 347 348int 349sctp_opt_info(int sd, sctp_assoc_t id, int opt, void *arg, socklen_t * size) 350{ 351 if (arg == NULL) { 352 errno = EINVAL; 353 return (-1); 354 } 355 switch (opt) { 356 case SCTP_RTOINFO: 357 ((struct sctp_rtoinfo *)arg)->srto_assoc_id = id; 358 break; 359 case SCTP_ASSOCINFO: 360 ((struct sctp_assocparams *)arg)->sasoc_assoc_id = id; 361 break; 362 case SCTP_DEFAULT_SEND_PARAM: 363 ((struct sctp_assocparams *)arg)->sasoc_assoc_id = id; 364 break; 365 case SCTP_SET_PEER_PRIMARY_ADDR: 366 ((struct sctp_setpeerprim *)arg)->sspp_assoc_id = id; 367 break; 368 case SCTP_PRIMARY_ADDR: 369 ((struct sctp_setprim *)arg)->ssp_assoc_id = id; 370 break; 371 case SCTP_PEER_ADDR_PARAMS: 372 ((struct sctp_paddrparams *)arg)->spp_assoc_id = id; 373 break; 374 case SCTP_MAXSEG: 375 ((struct sctp_assoc_value *)arg)->assoc_id = id; 376 break; 377 case SCTP_AUTH_KEY: 378 ((struct sctp_authkey *)arg)->sca_assoc_id = id; 379 break; 380 case SCTP_AUTH_ACTIVE_KEY: 381 ((struct sctp_authkeyid *)arg)->scact_assoc_id = id; 382 break; 383 case SCTP_DELAYED_SACK: 384 ((struct sctp_sack_info *)arg)->sack_assoc_id = id; 385 break; 386 case SCTP_CONTEXT: 387 ((struct sctp_assoc_value *)arg)->assoc_id = id; 388 break; 389 case SCTP_STATUS: 390 ((struct sctp_status *)arg)->sstat_assoc_id = id; 391 break; 392 case SCTP_GET_PEER_ADDR_INFO: 393 ((struct sctp_paddrinfo *)arg)->spinfo_assoc_id = id; 394 break; 395 case SCTP_PEER_AUTH_CHUNKS: 396 ((struct sctp_authchunks *)arg)->gauth_assoc_id = id; 397 break; 398 case SCTP_LOCAL_AUTH_CHUNKS: 399 ((struct sctp_authchunks *)arg)->gauth_assoc_id = id; 400 break; 401 default: 402 break; 403 } 404 return (getsockopt(sd, IPPROTO_SCTP, opt, arg, size)); 405} 406 407int 408sctp_getpaddrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) 409{ 410 struct sctp_getaddresses *addrs; 411 struct sockaddr *sa; 412 struct sockaddr *re; 413 sctp_assoc_t asoc; 414 caddr_t lim; 415 socklen_t siz; 416 int cnt; 417 418 if (raddrs == NULL) { 419 errno = EFAULT; 420 return (-1); 421 } 422 asoc = id; 423 siz = sizeof(sctp_assoc_t); 424 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_REMOTE_ADDR_SIZE, 425 &asoc, &siz) != 0) { 426 return (-1); 427 } 428 /* size required is returned in 'asoc' */ 429 siz = (size_t)asoc; 430 siz += sizeof(struct sctp_getaddresses); 431 addrs = calloc(1, siz); 432 if (addrs == NULL) { 433 return (-1); 434 } 435 addrs->sget_assoc_id = id; 436 /* Now lets get the array of addresses */ 437 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_PEER_ADDRESSES, 438 addrs, &siz) != 0) { 439 free(addrs); 440 return (-1); 441 } 442 re = (struct sockaddr *)&addrs->addr[0]; 443 *raddrs = re; 444 cnt = 0; 445 sa = (struct sockaddr *)&addrs->addr[0]; 446 lim = (caddr_t)addrs + siz; 447 while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { 448 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 449 cnt++; 450 } 451 return (cnt); 452} 453 454void 455sctp_freepaddrs(struct sockaddr *addrs) 456{ 457 /* Take away the hidden association id */ 458 void *fr_addr; 459 460 fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); 461 /* Now free it */ 462 free(fr_addr); 463} 464 465int 466sctp_getladdrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) 467{ 468 struct sctp_getaddresses *addrs; 469 struct sockaddr *re; 470 caddr_t lim; 471 struct sockaddr *sa; 472 int size_of_addresses; 473 socklen_t siz; 474 int cnt; 475 476 if (raddrs == NULL) { 477 errno = EFAULT; 478 return (-1); 479 } 480 size_of_addresses = 0; 481 siz = sizeof(int); 482 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDR_SIZE, 483 &size_of_addresses, &siz) != 0) { 484 errno = ENOMEM; 485 return (-1); 486 } 487 if (size_of_addresses == 0) { 488 errno = ENOTCONN; 489 return (-1); 490 } 491 siz = size_of_addresses + sizeof(struct sockaddr_storage); 492 siz += sizeof(struct sctp_getaddresses); 493 addrs = calloc(1, siz); 494 if (addrs == NULL) { 495 errno = ENOMEM; 496 return (-1); 497 } 498 addrs->sget_assoc_id = id; 499 /* Now lets get the array of addresses */ 500 if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDRESSES, addrs, 501 &siz) != 0) { 502 free(addrs); 503 errno = ENOMEM; 504 return (-1); 505 } 506 re = (struct sockaddr *)&addrs->addr[0]; 507 *raddrs = re; 508 cnt = 0; 509 sa = (struct sockaddr *)&addrs->addr[0]; 510 lim = (caddr_t)addrs + siz; 511 while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { 512 sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); 513 cnt++; 514 } 515 return (cnt); 516} 517 518void 519sctp_freeladdrs(struct sockaddr *addrs) 520{ 521 /* Take away the hidden association id */ 522 void *fr_addr; 523 524 fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); 525 /* Now free it */ 526 free(fr_addr); 527} 528 529 530ssize_t 531sctp_sendmsg(int s, 532 const void *data, 533 size_t len, 534 const struct sockaddr *to, 535 socklen_t tolen, 536 u_int32_t ppid, 537 u_int32_t flags, 538 u_int16_t stream_no, 539 u_int32_t timetolive, 540 u_int32_t context) 541{ 542#ifdef SYS_sctp_generic_sendmsg 543 struct sctp_sndrcvinfo sinfo; 544 545 sinfo.sinfo_ppid = ppid; 546 sinfo.sinfo_flags = flags; 547 sinfo.sinfo_stream = stream_no; 548 sinfo.sinfo_timetolive = timetolive; 549 sinfo.sinfo_context = context; 550 sinfo.sinfo_assoc_id = 0; 551 return (syscall(SYS_sctp_generic_sendmsg, s, 552 data, len, to, tolen, &sinfo, 0)); 553#else 554 555 ssize_t sz; 556 struct msghdr msg; 557 struct sctp_sndrcvinfo *s_info; 558 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 559 char controlVector[SCTP_CONTROL_VEC_SIZE_RCV]; 560 struct cmsghdr *cmsg; 561 struct sockaddr *who = NULL; 562 union { 563 struct sockaddr_in in; 564 struct sockaddr_in6 in6; 565 } addr; 566 567/* 568 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", 569 s, 570 (u_int)data, 571 (int)len, 572 (u_int)to, 573 (int)tolen, 574 ppid, flags, 575 (int)stream_no, 576 (int)timetolive, 577 (u_int)context); 578 fflush(io); 579*/ 580 if ((tolen > 0) && ((to == NULL) || (tolen < sizeof(struct sockaddr)))) { 581 errno = EINVAL; 582 return -1; 583 } 584 if (to && (tolen > 0)) { 585 if (to->sa_family == AF_INET) { 586 if (tolen != sizeof(struct sockaddr_in)) { 587 errno = EINVAL; 588 return -1; 589 } 590 if ((to->sa_len > 0) && (to->sa_len != sizeof(struct sockaddr_in))) { 591 errno = EINVAL; 592 return -1; 593 } 594 memcpy(&addr, to, sizeof(struct sockaddr_in)); 595 addr.in.sin_len = sizeof(struct sockaddr_in); 596 } else if (to->sa_family == AF_INET6) { 597 if (tolen != sizeof(struct sockaddr_in6)) { 598 errno = EINVAL; 599 return -1; 600 } 601 if ((to->sa_len > 0) && (to->sa_len != sizeof(struct sockaddr_in6))) { 602 errno = EINVAL; 603 return -1; 604 } 605 memcpy(&addr, to, sizeof(struct sockaddr_in6)); 606 addr.in6.sin6_len = sizeof(struct sockaddr_in6); 607 } else { 608 errno = EAFNOSUPPORT; 609 return -1; 610 } 611 who = (struct sockaddr *)&addr; 612 } 613 iov[0].iov_base = (char *)data; 614 iov[0].iov_len = len; 615 iov[1].iov_base = NULL; 616 iov[1].iov_len = 0; 617 618 if (who) { 619 msg.msg_name = (caddr_t)who; 620 msg.msg_namelen = who->sa_len; 621 } else { 622 msg.msg_name = (caddr_t)NULL; 623 msg.msg_namelen = 0; 624 } 625 msg.msg_iov = iov; 626 msg.msg_iovlen = 1; 627 msg.msg_control = (caddr_t)controlVector; 628 629 cmsg = (struct cmsghdr *)controlVector; 630 631 cmsg->cmsg_level = IPPROTO_SCTP; 632 cmsg->cmsg_type = SCTP_SNDRCV; 633 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); 634 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 635 636 s_info->sinfo_stream = stream_no; 637 s_info->sinfo_ssn = 0; 638 s_info->sinfo_flags = flags; 639 s_info->sinfo_ppid = ppid; 640 s_info->sinfo_context = context; 641 s_info->sinfo_assoc_id = 0; 642 s_info->sinfo_timetolive = timetolive; 643 errno = 0; 644 msg.msg_controllen = cmsg->cmsg_len; 645 sz = sendmsg(s, &msg, 0); 646 return (sz); 647#endif 648} 649 650 651sctp_assoc_t 652sctp_getassocid(int sd, struct sockaddr *sa) 653{ 654 struct sctp_paddrinfo sp; 655 socklen_t siz; 656 657 /* First get the assoc id */ 658 siz = sizeof(sp); 659 memset(&sp, 0, sizeof(sp)); 660 memcpy((caddr_t)&sp.spinfo_address, sa, sa->sa_len); 661 errno = 0; 662 if (getsockopt(sd, IPPROTO_SCTP, 663 SCTP_GET_PEER_ADDR_INFO, &sp, &siz) != 0) { 664 return ((sctp_assoc_t) 0); 665 } 666 /* We depend on the fact that 0 can never be returned */ 667 return (sp.spinfo_assoc_id); 668} 669 670ssize_t 671sctp_send(int sd, const void *data, size_t len, 672 const struct sctp_sndrcvinfo *sinfo, 673 int flags) 674{ 675 676#ifdef SYS_sctp_generic_sendmsg 677 struct sockaddr *to = NULL; 678 679 return (syscall(SYS_sctp_generic_sendmsg, sd, 680 data, len, to, 0, sinfo, flags)); 681#else 682 ssize_t sz; 683 struct msghdr msg; 684 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 685 struct sctp_sndrcvinfo *s_info; 686 char controlVector[SCTP_CONTROL_VEC_SIZE_SND]; 687 struct cmsghdr *cmsg; 688 689 if (sinfo == NULL) { 690 errno = EINVAL; 691 return (-1); 692 } 693 iov[0].iov_base = (char *)data; 694 iov[0].iov_len = len; 695 iov[1].iov_base = NULL; 696 iov[1].iov_len = 0; 697 698 msg.msg_name = 0; 699 msg.msg_namelen = 0; 700 msg.msg_iov = iov; 701 msg.msg_iovlen = 1; 702 msg.msg_control = (caddr_t)controlVector; 703 704 cmsg = (struct cmsghdr *)controlVector; 705 706 cmsg->cmsg_level = IPPROTO_SCTP; 707 cmsg->cmsg_type = SCTP_SNDRCV; 708 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); 709 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 710 /* copy in the data */ 711 *s_info = *sinfo; 712 errno = 0; 713 msg.msg_controllen = cmsg->cmsg_len; 714 sz = sendmsg(sd, &msg, flags); 715 return (sz); 716#endif 717} 718 719 720 721ssize_t 722sctp_sendx(int sd, const void *msg, size_t msg_len, 723 struct sockaddr *addrs, int addrcnt, 724 struct sctp_sndrcvinfo *sinfo, 725 int flags) 726{ 727 ssize_t ret; 728 int i, cnt, *aa, saved_errno; 729 char *buf; 730 int add_len, len, no_end_cx = 0; 731 struct sockaddr *at; 732 733 if (addrs == NULL) { 734 errno = EINVAL; 735 return (-1); 736 } 737#ifdef SYS_sctp_generic_sendmsg 738 if (addrcnt < SCTP_SMALL_IOVEC_SIZE) { 739 socklen_t l; 740 741 /* 742 * Quick way, we don't need to do a connectx so lets use the 743 * syscall directly. 744 */ 745 l = addrs->sa_len; 746 return (syscall(SYS_sctp_generic_sendmsg, sd, 747 msg, msg_len, addrs, l, sinfo, flags)); 748 } 749#endif 750 751 len = sizeof(int); 752 at = addrs; 753 cnt = 0; 754 /* validate all the addresses and get the size */ 755 for (i = 0; i < addrcnt; i++) { 756 if (at->sa_family == AF_INET) { 757 add_len = sizeof(struct sockaddr_in); 758 } else if (at->sa_family == AF_INET6) { 759 add_len = sizeof(struct sockaddr_in6); 760 } else { 761 errno = EINVAL; 762 return (-1); 763 } 764 len += add_len; 765 at = (struct sockaddr *)((caddr_t)at + add_len); 766 cnt++; 767 } 768 /* do we have any? */ 769 if (cnt == 0) { 770 errno = EINVAL; 771 return (-1); 772 } 773 buf = malloc(len); 774 if (buf == NULL) { 775 return (-1); 776 } 777 aa = (int *)buf; 778 *aa = cnt; 779 aa++; 780 memcpy((caddr_t)aa, addrs, (len - sizeof(int))); 781 ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_DELAYED, (void *)buf, 782 (socklen_t) len); 783 784 free(buf); 785 if (ret != 0) { 786 if (errno == EALREADY) { 787 no_end_cx = 1;; 788 goto continue_send; 789 } 790 return (ret); 791 } 792continue_send: 793 sinfo->sinfo_assoc_id = sctp_getassocid(sd, addrs); 794 if (sinfo->sinfo_assoc_id == 0) { 795 printf("Huh, can't get associd? TSNH!\n"); 796 (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, 797 (socklen_t) addrs->sa_len); 798 errno = ENOENT; 799 return (-1); 800 } 801 ret = sctp_send(sd, msg, msg_len, sinfo, flags); 802 saved_errno = errno; 803 if (no_end_cx == 0) 804 (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, 805 (socklen_t) addrs->sa_len); 806 807 errno = saved_errno; 808 return (ret); 809} 810 811ssize_t 812sctp_sendmsgx(int sd, 813 const void *msg, 814 size_t len, 815 struct sockaddr *addrs, 816 int addrcnt, 817 u_int32_t ppid, 818 u_int32_t flags, 819 u_int16_t stream_no, 820 u_int32_t timetolive, 821 u_int32_t context) 822{ 823 struct sctp_sndrcvinfo sinfo; 824 825 memset((void *)&sinfo, 0, sizeof(struct sctp_sndrcvinfo)); 826 sinfo.sinfo_ppid = ppid; 827 sinfo.sinfo_flags = flags; 828 sinfo.sinfo_ssn = stream_no; 829 sinfo.sinfo_timetolive = timetolive; 830 sinfo.sinfo_context = context; 831 return sctp_sendx(sd, msg, len, addrs, addrcnt, &sinfo, 0); 832} 833 834ssize_t 835sctp_recvmsg(int s, 836 void *dbuf, 837 size_t len, 838 struct sockaddr *from, 839 socklen_t * fromlen, 840 struct sctp_sndrcvinfo *sinfo, 841 int *msg_flags) 842{ 843#ifdef SYS_sctp_generic_recvmsg 844 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 845 846 iov[0].iov_base = dbuf; 847 iov[0].iov_len = len; 848 return (syscall(SYS_sctp_generic_recvmsg, s, 849 iov, 1, from, fromlen, sinfo, msg_flags)); 850#else 851 struct sctp_sndrcvinfo *s_info; 852 ssize_t sz; 853 int sinfo_found = 0; 854 struct msghdr msg; 855 struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; 856 char controlVector[SCTP_CONTROL_VEC_SIZE_RCV]; 857 struct cmsghdr *cmsg; 858 859 if (msg_flags == NULL) { 860 errno = EINVAL; 861 return (-1); 862 } 863 msg.msg_flags = 0; 864 iov[0].iov_base = dbuf; 865 iov[0].iov_len = len; 866 iov[1].iov_base = NULL; 867 iov[1].iov_len = 0; 868 msg.msg_name = (caddr_t)from; 869 if (fromlen == NULL) 870 msg.msg_namelen = 0; 871 else 872 msg.msg_namelen = *fromlen; 873 msg.msg_iov = iov; 874 msg.msg_iovlen = 1; 875 msg.msg_control = (caddr_t)controlVector; 876 msg.msg_controllen = sizeof(controlVector); 877 errno = 0; 878 sz = recvmsg(s, &msg, *msg_flags); 879 if (sz <= 0) 880 return (sz); 881 882 s_info = NULL; 883 len = sz; 884 *msg_flags = msg.msg_flags; 885 if (sinfo) 886 sinfo->sinfo_assoc_id = 0; 887 888 if ((msg.msg_controllen) && sinfo) { 889 /* 890 * parse through and see if we find the sctp_sndrcvinfo (if 891 * the user wants it). 892 */ 893 cmsg = (struct cmsghdr *)controlVector; 894 while (cmsg) { 895 if ((cmsg->cmsg_len == 0) || (cmsg->cmsg_len > msg.msg_controllen)) { 896 break; 897 } 898 if (cmsg->cmsg_level == IPPROTO_SCTP) { 899 if (cmsg->cmsg_type == SCTP_SNDRCV) { 900 /* Got it */ 901 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 902 /* Copy it to the user */ 903 if (sinfo) 904 *sinfo = *s_info; 905 sinfo_found = 1; 906 break; 907 } else if (cmsg->cmsg_type == SCTP_EXTRCV) { 908 /* 909 * Got it, presumably the user has 910 * asked for this extra info, so the 911 * structure holds more room :-D 912 */ 913 s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 914 /* Copy it to the user */ 915 if (sinfo) { 916 memcpy(sinfo, s_info, sizeof(struct sctp_extrcvinfo)); 917 } 918 sinfo_found = 1; 919 break; 920 921 } 922 } 923 cmsg = CMSG_NXTHDR(&msg, cmsg); 924 } 925 } 926 return (sz); 927#endif 928} 929 930 931#if defined(HAVE_SCTP_PEELOFF_SOCKOPT) 932#include <netinet/sctp_peeloff.h> 933 934int 935sctp_peeloff(int sd, sctp_assoc_t assoc_id) 936{ 937 struct sctp_peeloff_opt peeloff; 938 int error; 939 socklen_t optlen; 940 941 /* set in the socket option params */ 942 memset(&peeloff, 0, sizeof(peeloff)); 943 peeloff.s = sd; 944 peeloff.assoc_id = assoc_id; 945 optlen = sizeof(peeloff); 946 error = getsockopt(sd, IPPROTO_SCTP, SCTP_PEELOFF, (void *)&peeloff, 947 &optlen); 948 if (error) { 949 errno = error; 950 return (-1); 951 } else { 952 return (peeloff.new_sd); 953 } 954} 955 956#endif 957 958#if !defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) 959 960int 961sctp_peeloff(int sd, sctp_assoc_t assoc_id) 962{ 963 /* NOT supported, return invalid sd */ 964 errno = ENOTSUP; 965 return (-1); 966} 967 968#endif 969#if defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) 970int 971sctp_peeloff(int sd, sctp_assoc_t assoc_id) 972{ 973 return (syscall(SYS_sctp_peeloff, sd, assoc_id)); 974} 975 976#endif 977 978 979#undef SCTP_CONTROL_VEC_SIZE_SND 980#undef SCTP_CONTROL_VEC_SIZE_RCV 981#undef SCTP_STACK_BUF_SIZE 982#undef SCTP_SMALL_IOVEC_SIZE 983