1 /* crypto/bio/bio_dgram.c */ 2 /* 3 * DTLS implementation written by Nagendra Modadugu 4 * (nagendra (at) cs.stanford.edu) for the OpenSSL project 2005. 5 */ 6 /* ==================================================================== 7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * openssl-core (at) OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay (at) cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh (at) cryptsoft.com). 57 * 58 */ 59 60 61 #include <stdio.h> 62 #include <errno.h> 63 #define USE_SOCKETS 64 #include "cryptlib.h" 65 66 #include <openssl/bio.h> 67 #ifndef OPENSSL_NO_DGRAM 68 69 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) 70 #include <sys/timeb.h> 71 #endif 72 73 #ifndef OPENSSL_NO_SCTP 74 #include <netinet/sctp.h> 75 #include <fcntl.h> 76 #define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00 77 #define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0 78 #endif 79 80 #if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU) 81 #define IP_MTU 14 /* linux is lame */ 82 #endif 83 84 #if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED) 85 /* Standard definition causes type-punning problems. */ 86 #undef IN6_IS_ADDR_V4MAPPED 87 #define s6_addr32 __u6_addr.__u6_addr32 88 #define IN6_IS_ADDR_V4MAPPED(a) \ 89 (((a)->s6_addr32[0] == 0) && \ 90 ((a)->s6_addr32[1] == 0) && \ 91 ((a)->s6_addr32[2] == htonl(0x0000ffff))) 92 #endif 93 94 #ifdef WATT32 95 #define sock_write SockWrite /* Watt-32 uses same names */ 96 #define sock_read SockRead 97 #define sock_puts SockPuts 98 #endif 99 100 static int dgram_write(BIO *h, const char *buf, int num); 101 static int dgram_read(BIO *h, char *buf, int size); 102 static int dgram_puts(BIO *h, const char *str); 103 static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2); 104 static int dgram_new(BIO *h); 105 static int dgram_free(BIO *data); 106 static int dgram_clear(BIO *bio); 107 108 #ifndef OPENSSL_NO_SCTP 109 static int dgram_sctp_write(BIO *h, const char *buf, int num); 110 static int dgram_sctp_read(BIO *h, char *buf, int size); 111 static int dgram_sctp_puts(BIO *h, const char *str); 112 static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2); 113 static int dgram_sctp_new(BIO *h); 114 static int dgram_sctp_free(BIO *data); 115 #ifdef SCTP_AUTHENTICATION_EVENT 116 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp); 117 #endif 118 #endif 119 120 static int BIO_dgram_should_retry(int s); 121 122 static void get_current_time(struct timeval *t); 123 124 static BIO_METHOD methods_dgramp= 125 { 126 BIO_TYPE_DGRAM, 127 "datagram socket", 128 dgram_write, 129 dgram_read, 130 dgram_puts, 131 NULL, /* dgram_gets, */ 132 dgram_ctrl, 133 dgram_new, 134 dgram_free, 135 NULL, 136 }; 137 138 #ifndef OPENSSL_NO_SCTP 139 static BIO_METHOD methods_dgramp_sctp= 140 { 141 BIO_TYPE_DGRAM_SCTP, 142 "datagram sctp socket", 143 dgram_sctp_write, 144 dgram_sctp_read, 145 dgram_sctp_puts, 146 NULL, /* dgram_gets, */ 147 dgram_sctp_ctrl, 148 dgram_sctp_new, 149 dgram_sctp_free, 150 NULL, 151 }; 152 #endif 153 154 typedef struct bio_dgram_data_st 155 { 156 union { 157 struct sockaddr sa; 158 struct sockaddr_in sa_in; 159 #if OPENSSL_USE_IPV6 160 struct sockaddr_in6 sa_in6; 161 #endif 162 } peer; 163 unsigned int connected; 164 unsigned int _errno; 165 unsigned int mtu; 166 struct timeval next_timeout; 167 struct timeval socket_timeout; 168 } bio_dgram_data; 169 170 #ifndef OPENSSL_NO_SCTP 171 typedef struct bio_dgram_sctp_save_message_st 172 { 173 BIO *bio; 174 char *data; 175 int length; 176 } bio_dgram_sctp_save_message; 177 178 typedef struct bio_dgram_sctp_data_st 179 { 180 union { 181 struct sockaddr sa; 182 struct sockaddr_in sa_in; 183 #if OPENSSL_USE_IPV6 184 struct sockaddr_in6 sa_in6; 185 #endif 186 } peer; 187 unsigned int connected; 188 unsigned int _errno; 189 unsigned int mtu; 190 struct bio_dgram_sctp_sndinfo sndinfo; 191 struct bio_dgram_sctp_rcvinfo rcvinfo; 192 struct bio_dgram_sctp_prinfo prinfo; 193 void (*handle_notifications)(BIO *bio, void *context, void *buf); 194 void* notification_context; 195 int in_handshake; 196 int ccs_rcvd; 197 int ccs_sent; 198 int save_shutdown; 199 int peer_auth_tested; 200 bio_dgram_sctp_save_message saved_message; 201 } bio_dgram_sctp_data; 202 #endif 203 204 BIO_METHOD *BIO_s_datagram(void) 205 { 206 return(&methods_dgramp); 207 } 208 209 BIO *BIO_new_dgram(int fd, int close_flag) 210 { 211 BIO *ret; 212 213 ret=BIO_new(BIO_s_datagram()); 214 if (ret == NULL) return(NULL); 215 BIO_set_fd(ret,fd,close_flag); 216 return(ret); 217 } 218 219 static int dgram_new(BIO *bi) 220 { 221 bio_dgram_data *data = NULL; 222 223 bi->init=0; 224 bi->num=0; 225 data = OPENSSL_malloc(sizeof(bio_dgram_data)); 226 if (data == NULL) 227 return 0; 228 memset(data, 0x00, sizeof(bio_dgram_data)); 229 bi->ptr = data; 230 231 bi->flags=0; 232 return(1); 233 } 234 235 static int dgram_free(BIO *a) 236 { 237 bio_dgram_data *data; 238 239 if (a == NULL) return(0); 240 if ( ! dgram_clear(a)) 241 return 0; 242 243 data = (bio_dgram_data *)a->ptr; 244 if(data != NULL) OPENSSL_free(data); 245 246 return(1); 247 } 248 249 static int dgram_clear(BIO *a) 250 { 251 if (a == NULL) return(0); 252 if (a->shutdown) 253 { 254 if (a->init) 255 { 256 SHUTDOWN2(a->num); 257 } 258 a->init=0; 259 a->flags=0; 260 } 261 return(1); 262 } 263 264 static void dgram_adjust_rcv_timeout(BIO *b) 265 { 266 #if defined(SO_RCVTIMEO) 267 bio_dgram_data *data = (bio_dgram_data *)b->ptr; 268 union { size_t s; int i; } sz = {0}; 269 270 /* Is a timer active? */ 271 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) 272 { 273 struct timeval timenow, timeleft; 274 275 /* Read current socket timeout */ 276 #ifdef OPENSSL_SYS_WINDOWS 277 int timeout; 278 279 sz.i = sizeof(timeout); 280 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 281 (void*)&timeout, &sz.i) < 0) 282 { perror("getsockopt"); } 283 else 284 { 285 data->socket_timeout.tv_sec = timeout / 1000; 286 data->socket_timeout.tv_usec = (timeout % 1000) * 1000; 287 } 288 #else 289 sz.i = sizeof(data->socket_timeout); 290 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 291 &(data->socket_timeout), (void *)&sz) < 0) 292 { perror("getsockopt"); } 293 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0) 294 OPENSSL_assert(sz.s<=sizeof(data->socket_timeout)); 295 #endif 296 297 /* Get current time */ 298 get_current_time(&timenow); 299 300 /* Calculate time left until timer expires */ 301 memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval)); 302 timeleft.tv_sec -= timenow.tv_sec; 303 timeleft.tv_usec -= timenow.tv_usec; 304 if (timeleft.tv_usec < 0) 305 { 306 timeleft.tv_sec--; 307 timeleft.tv_usec += 1000000; 308 } 309 310 if (timeleft.tv_sec < 0) 311 { 312 timeleft.tv_sec = 0; 313 timeleft.tv_usec = 1; 314 } 315 316 /* Adjust socket timeout if next handhake message timer 317 * will expire earlier. 318 */ 319 if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) || 320 (data->socket_timeout.tv_sec > timeleft.tv_sec) || 321 (data->socket_timeout.tv_sec == timeleft.tv_sec && 322 data->socket_timeout.tv_usec >= timeleft.tv_usec)) 323 { 324 #ifdef OPENSSL_SYS_WINDOWS 325 timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000; 326 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 327 (void*)&timeout, sizeof(timeout)) < 0) 328 { perror("setsockopt"); } 329 #else 330 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft, 331 sizeof(struct timeval)) < 0) 332 { perror("setsockopt"); } 333 #endif 334 } 335 } 336 #endif 337 } 338 339 static void dgram_reset_rcv_timeout(BIO *b) 340 { 341 #if defined(SO_RCVTIMEO) 342 bio_dgram_data *data = (bio_dgram_data *)b->ptr; 343 344 /* Is a timer active? */ 345 if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) 346 { 347 #ifdef OPENSSL_SYS_WINDOWS 348 int timeout = data->socket_timeout.tv_sec * 1000 + 349 data->socket_timeout.tv_usec / 1000; 350 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 351 (void*)&timeout, sizeof(timeout)) < 0) 352 { perror("setsockopt"); } 353 #else 354 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout), 355 sizeof(struct timeval)) < 0) 356 { perror("setsockopt"); } 357 #endif 358 } 359 #endif 360 } 361 362 static int dgram_read(BIO *b, char *out, int outl) 363 { 364 int ret=0; 365 bio_dgram_data *data = (bio_dgram_data *)b->ptr; 366 367 struct { 368 /* 369 * See commentary in b_sock.c. <appro> 370 */ 371 union { size_t s; int i; } len; 372 union { 373 struct sockaddr sa; 374 struct sockaddr_in sa_in; 375 #if OPENSSL_USE_IPV6 376 struct sockaddr_in6 sa_in6; 377 #endif 378 } peer; 379 } sa; 380 381 sa.len.s=0; 382 sa.len.i=sizeof(sa.peer); 383 384 if (out != NULL) 385 { 386 clear_socket_error(); 387 memset(&sa.peer, 0x00, sizeof(sa.peer)); 388 dgram_adjust_rcv_timeout(b); 389 ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len); 390 if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0) 391 { 392 OPENSSL_assert(sa.len.s<=sizeof(sa.peer)); 393 sa.len.i = (int)sa.len.s; 394 } 395 396 if ( ! data->connected && ret >= 0) 397 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer); 398 399 BIO_clear_retry_flags(b); 400 if (ret < 0) 401 { 402 if (BIO_dgram_should_retry(ret)) 403 { 404 BIO_set_retry_read(b); 405 data->_errno = get_last_socket_error(); 406 } 407 } 408 409 dgram_reset_rcv_timeout(b); 410 } 411 return(ret); 412 } 413 414 static int dgram_write(BIO *b, const char *in, int inl) 415 { 416 int ret; 417 bio_dgram_data *data = (bio_dgram_data *)b->ptr; 418 clear_socket_error(); 419 420 if ( data->connected ) 421 ret=writesocket(b->num,in,inl); 422 else 423 { 424 int peerlen = sizeof(data->peer); 425 426 if (data->peer.sa.sa_family == AF_INET) 427 peerlen = sizeof(data->peer.sa_in); 428 #if OPENSSL_USE_IPV6 429 else if (data->peer.sa.sa_family == AF_INET6) 430 peerlen = sizeof(data->peer.sa_in6); 431 #endif 432 #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK) 433 ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen); 434 #else 435 ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen); 436 #endif 437 } 438 439 BIO_clear_retry_flags(b); 440 if (ret <= 0) 441 { 442 if (BIO_dgram_should_retry(ret)) 443 { 444 BIO_set_retry_write(b); 445 data->_errno = get_last_socket_error(); 446 447 #if 0 /* higher layers are responsible for querying MTU, if necessary */ 448 if ( data->_errno == EMSGSIZE) 449 /* retrieve the new MTU */ 450 BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL); 451 #endif 452 } 453 } 454 return(ret); 455 } 456 457 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr) 458 { 459 long ret=1; 460 int *ip; 461 struct sockaddr *to = NULL; 462 bio_dgram_data *data = NULL; 463 #if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU)) 464 int sockopt_val = 0; 465 socklen_t sockopt_len; /* assume that system supporting IP_MTU is 466 * modern enough to define socklen_t */ 467 socklen_t addr_len; 468 union { 469 struct sockaddr sa; 470 struct sockaddr_in s4; 471 #if OPENSSL_USE_IPV6 472 struct sockaddr_in6 s6; 473 #endif 474 } addr; 475 #endif 476 477 data = (bio_dgram_data *)b->ptr; 478 479 switch (cmd) 480 { 481 case BIO_CTRL_RESET: 482 num=0; 483 case BIO_C_FILE_SEEK: 484 ret=0; 485 break; 486 case BIO_C_FILE_TELL: 487 case BIO_CTRL_INFO: 488 ret=0; 489 break; 490 case BIO_C_SET_FD: 491 dgram_clear(b); 492 b->num= *((int *)ptr); 493 b->shutdown=(int)num; 494 b->init=1; 495 break; 496 case BIO_C_GET_FD: 497 if (b->init) 498 { 499 ip=(int *)ptr; 500 if (ip != NULL) *ip=b->num; 501 ret=b->num; 502 } 503 else 504 ret= -1; 505 break; 506 case BIO_CTRL_GET_CLOSE: 507 ret=b->shutdown; 508 break; 509 case BIO_CTRL_SET_CLOSE: 510 b->shutdown=(int)num; 511 break; 512 case BIO_CTRL_PENDING: 513 case BIO_CTRL_WPENDING: 514 ret=0; 515 break; 516 case BIO_CTRL_DUP: 517 case BIO_CTRL_FLUSH: 518 ret=1; 519 break; 520 case BIO_CTRL_DGRAM_CONNECT: 521 to = (struct sockaddr *)ptr; 522 #if 0 523 if (connect(b->num, to, sizeof(struct sockaddr)) < 0) 524 { perror("connect"); ret = 0; } 525 else 526 { 527 #endif 528 switch (to->sa_family) 529 { 530 case AF_INET: 531 memcpy(&data->peer,to,sizeof(data->peer.sa_in)); 532 break; 533 #if OPENSSL_USE_IPV6 534 case AF_INET6: 535 memcpy(&data->peer,to,sizeof(data->peer.sa_in6)); 536 break; 537 #endif 538 default: 539 memcpy(&data->peer,to,sizeof(data->peer.sa)); 540 break; 541 } 542 #if 0 543 } 544 #endif 545 break; 546 /* (Linux)kernel sets DF bit on outgoing IP packets */ 547 case BIO_CTRL_DGRAM_MTU_DISCOVER: 548 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO) 549 addr_len = (socklen_t)sizeof(addr); 550 memset((void *)&addr, 0, sizeof(addr)); 551 if (getsockname(b->num, &addr.sa, &addr_len) < 0) 552 { 553 ret = 0; 554 break; 555 } 556 switch (addr.sa.sa_family) 557 { 558 case AF_INET: 559 sockopt_val = IP_PMTUDISC_DO; 560 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER, 561 &sockopt_val, sizeof(sockopt_val))) < 0) 562 perror("setsockopt"); 563 break; 564 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO) 565 case AF_INET6: 566 sockopt_val = IPV6_PMTUDISC_DO; 567 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER, 568 &sockopt_val, sizeof(sockopt_val))) < 0) 569 perror("setsockopt"); 570 break; 571 #endif 572 default: 573 ret = -1; 574 break; 575 } 576 ret = -1; 577 #else 578 break; 579 #endif 580 case BIO_CTRL_DGRAM_QUERY_MTU: 581 #if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU) 582 addr_len = (socklen_t)sizeof(addr); 583 memset((void *)&addr, 0, sizeof(addr)); 584 if (getsockname(b->num, &addr.sa, &addr_len) < 0) 585 { 586 ret = 0; 587 break; 588 } 589 sockopt_len = sizeof(sockopt_val); 590 switch (addr.sa.sa_family) 591 { 592 case AF_INET: 593 if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val, 594 &sockopt_len)) < 0 || sockopt_val < 0) 595 { 596 ret = 0; 597 } 598 else 599 { 600 /* we assume that the transport protocol is UDP and no 601 * IP options are used. 602 */ 603 data->mtu = sockopt_val - 8 - 20; 604 ret = data->mtu; 605 } 606 break; 607 #if OPENSSL_USE_IPV6 && defined(IPV6_MTU) 608 case AF_INET6: 609 if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val, 610 &sockopt_len)) < 0 || sockopt_val < 0) 611 { 612 ret = 0; 613 } 614 else 615 { 616 /* we assume that the transport protocol is UDP and no 617 * IPV6 options are used. 618 */ 619 data->mtu = sockopt_val - 8 - 40; 620 ret = data->mtu; 621 } 622 break; 623 #endif 624 default: 625 ret = 0; 626 break; 627 } 628 #else 629 ret = 0; 630 #endif 631 break; 632 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU: 633 switch (data->peer.sa.sa_family) 634 { 635 case AF_INET: 636 ret = 576 - 20 - 8; 637 break; 638 #if OPENSSL_USE_IPV6 639 case AF_INET6: 640 #ifdef IN6_IS_ADDR_V4MAPPED 641 if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr)) 642 ret = 576 - 20 - 8; 643 else 644 #endif 645 ret = 1280 - 40 - 8; 646 break; 647 #endif 648 default: 649 ret = 576 - 20 - 8; 650 break; 651 } 652 break; 653 case BIO_CTRL_DGRAM_GET_MTU: 654 return data->mtu; 655 break; 656 case BIO_CTRL_DGRAM_SET_MTU: 657 data->mtu = num; 658 ret = num; 659 break; 660 case BIO_CTRL_DGRAM_SET_CONNECTED: 661 to = (struct sockaddr *)ptr; 662 663 if ( to != NULL) 664 { 665 data->connected = 1; 666 switch (to->sa_family) 667 { 668 case AF_INET: 669 memcpy(&data->peer,to,sizeof(data->peer.sa_in)); 670 break; 671 #if OPENSSL_USE_IPV6 672 case AF_INET6: 673 memcpy(&data->peer,to,sizeof(data->peer.sa_in6)); 674 break; 675 #endif 676 default: 677 memcpy(&data->peer,to,sizeof(data->peer.sa)); 678 break; 679 } 680 } 681 else 682 { 683 data->connected = 0; 684 memset(&(data->peer), 0x00, sizeof(data->peer)); 685 } 686 break; 687 case BIO_CTRL_DGRAM_GET_PEER: 688 switch (data->peer.sa.sa_family) 689 { 690 case AF_INET: 691 ret=sizeof(data->peer.sa_in); 692 break; 693 #if OPENSSL_USE_IPV6 694 case AF_INET6: 695 ret=sizeof(data->peer.sa_in6); 696 break; 697 #endif 698 default: 699 ret=sizeof(data->peer.sa); 700 break; 701 } 702 if (num==0 || num>ret) 703 num=ret; 704 memcpy(ptr,&data->peer,(ret=num)); 705 break; 706 case BIO_CTRL_DGRAM_SET_PEER: 707 to = (struct sockaddr *) ptr; 708 switch (to->sa_family) 709 { 710 case AF_INET: 711 memcpy(&data->peer,to,sizeof(data->peer.sa_in)); 712 break; 713 #if OPENSSL_USE_IPV6 714 case AF_INET6: 715 memcpy(&data->peer,to,sizeof(data->peer.sa_in6)); 716 break; 717 #endif 718 default: 719 memcpy(&data->peer,to,sizeof(data->peer.sa)); 720 break; 721 } 722 break; 723 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT: 724 memcpy(&(data->next_timeout), ptr, sizeof(struct timeval)); 725 break; 726 #if defined(SO_RCVTIMEO) 727 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT: 728 #ifdef OPENSSL_SYS_WINDOWS 729 { 730 struct timeval *tv = (struct timeval *)ptr; 731 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000; 732 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 733 (void*)&timeout, sizeof(timeout)) < 0) 734 { perror("setsockopt"); ret = -1; } 735 } 736 #else 737 if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr, 738 sizeof(struct timeval)) < 0) 739 { perror("setsockopt"); ret = -1; } 740 #endif 741 break; 742 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT: 743 { 744 union { size_t s; int i; } sz = {0}; 745 #ifdef OPENSSL_SYS_WINDOWS 746 int timeout; 747 struct timeval *tv = (struct timeval *)ptr; 748 749 sz.i = sizeof(timeout); 750 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 751 (void*)&timeout, &sz.i) < 0) 752 { perror("getsockopt"); ret = -1; } 753 else 754 { 755 tv->tv_sec = timeout / 1000; 756 tv->tv_usec = (timeout % 1000) * 1000; 757 ret = sizeof(*tv); 758 } 759 #else 760 sz.i = sizeof(struct timeval); 761 if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, 762 ptr, (void *)&sz) < 0) 763 { perror("getsockopt"); ret = -1; } 764 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0) 765 { 766 OPENSSL_assert(sz.s<=sizeof(struct timeval)); 767 ret = (int)sz.s; 768 } 769 else 770 ret = sz.i; 771 #endif 772 } 773 break; 774 #endif 775 #if defined(SO_SNDTIMEO) 776 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT: 777 #ifdef OPENSSL_SYS_WINDOWS 778 { 779 struct timeval *tv = (struct timeval *)ptr; 780 int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000; 781 if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, 782 (void*)&timeout, sizeof(timeout)) < 0) 783 { perror("setsockopt"); ret = -1; } 784 } 785 #else 786 if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr, 787 sizeof(struct timeval)) < 0) 788 { perror("setsockopt"); ret = -1; } 789 #endif 790 break; 791 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT: 792 { 793 union { size_t s; int i; } sz = {0}; 794 #ifdef OPENSSL_SYS_WINDOWS 795 int timeout; 796 struct timeval *tv = (struct timeval *)ptr; 797 798 sz.i = sizeof(timeout); 799 if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, 800 (void*)&timeout, &sz.i) < 0) 801 { perror("getsockopt"); ret = -1; } 802 else 803 { 804 tv->tv_sec = timeout / 1000; 805 tv->tv_usec = (timeout % 1000) * 1000; 806 ret = sizeof(*tv); 807 } 808 #else 809 sz.i = sizeof(struct timeval); 810 if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, 811 ptr, (void *)&sz) < 0) 812 { perror("getsockopt"); ret = -1; } 813 else if (sizeof(sz.s)!=sizeof(sz.i) && sz.i==0) 814 { 815 OPENSSL_assert(sz.s<=sizeof(struct timeval)); 816 ret = (int)sz.s; 817 } 818 else 819 ret = sz.i; 820 #endif 821 } 822 break; 823 #endif 824 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP: 825 /* fall-through */ 826 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP: 827 #ifdef OPENSSL_SYS_WINDOWS 828 if ( data->_errno == WSAETIMEDOUT) 829 #else 830 if ( data->_errno == EAGAIN) 831 #endif 832 { 833 ret = 1; 834 data->_errno = 0; 835 } 836 else 837 ret = 0; 838 break; 839 #ifdef EMSGSIZE 840 case BIO_CTRL_DGRAM_MTU_EXCEEDED: 841 if ( data->_errno == EMSGSIZE) 842 { 843 ret = 1; 844 data->_errno = 0; 845 } 846 else 847 ret = 0; 848 break; 849 #endif 850 default: 851 ret=0; 852 break; 853 } 854 return(ret); 855 } 856 857 static int dgram_puts(BIO *bp, const char *str) 858 { 859 int n,ret; 860 861 n=strlen(str); 862 ret=dgram_write(bp,str,n); 863 return(ret); 864 } 865 866 #ifndef OPENSSL_NO_SCTP 867 BIO_METHOD *BIO_s_datagram_sctp(void) 868 { 869 return(&methods_dgramp_sctp); 870 } 871 872 BIO *BIO_new_dgram_sctp(int fd, int close_flag) 873 { 874 BIO *bio; 875 int ret, optval = 20000; 876 int auth_data = 0, auth_forward = 0; 877 unsigned char *p; 878 struct sctp_authchunk auth; 879 struct sctp_authchunks *authchunks; 880 socklen_t sockopt_len; 881 #ifdef SCTP_AUTHENTICATION_EVENT 882 #ifdef SCTP_EVENT 883 struct sctp_event event; 884 #else 885 struct sctp_event_subscribe event; 886 #endif 887 #endif 888 889 bio=BIO_new(BIO_s_datagram_sctp()); 890 if (bio == NULL) return(NULL); 891 BIO_set_fd(bio,fd,close_flag); 892 893 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */ 894 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE; 895 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk)); 896 OPENSSL_assert(ret >= 0); 897 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE; 898 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, sizeof(struct sctp_authchunk)); 899 OPENSSL_assert(ret >= 0); 900 901 /* Test if activation was successful. When using accept(), 902 * SCTP-AUTH has to be activated for the listening socket 903 * already, otherwise the connected socket won't use it. */ 904 sockopt_len = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t)); 905 authchunks = OPENSSL_malloc(sockopt_len); 906 memset(authchunks, 0, sizeof(sockopt_len)); 907 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, &sockopt_len); 908 OPENSSL_assert(ret >= 0); 909 910 for (p = (unsigned char*) authchunks->gauth_chunks; 911 p < (unsigned char*) authchunks + sockopt_len; 912 p += sizeof(uint8_t)) 913 { 914 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1; 915 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1; 916 } 917 918 OPENSSL_free(authchunks); 919 920 OPENSSL_assert(auth_data); 921 OPENSSL_assert(auth_forward); 922 923 #ifdef SCTP_AUTHENTICATION_EVENT 924 #ifdef SCTP_EVENT 925 memset(&event, 0, sizeof(struct sctp_event)); 926 event.se_assoc_id = 0; 927 event.se_type = SCTP_AUTHENTICATION_EVENT; 928 event.se_on = 1; 929 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event)); 930 OPENSSL_assert(ret >= 0); 931 #else 932 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe); 933 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len); 934 OPENSSL_assert(ret >= 0); 935 936 event.sctp_authentication_event = 1; 937 938 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe)); 939 OPENSSL_assert(ret >= 0); 940 #endif 941 #endif 942 943 /* Disable partial delivery by setting the min size 944 * larger than the max record size of 2^14 + 2048 + 13 945 */ 946 ret = setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, sizeof(optval)); 947 OPENSSL_assert(ret >= 0); 948 949 return(bio); 950 } 951 952 int BIO_dgram_is_sctp(BIO *bio) 953 { 954 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP); 955 } 956 957 static int dgram_sctp_new(BIO *bi) 958 { 959 bio_dgram_sctp_data *data = NULL; 960 961 bi->init=0; 962 bi->num=0; 963 data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data)); 964 if (data == NULL) 965 return 0; 966 memset(data, 0x00, sizeof(bio_dgram_sctp_data)); 967 #ifdef SCTP_PR_SCTP_NONE 968 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE; 969 #endif 970 bi->ptr = data; 971 972 bi->flags=0; 973 return(1); 974 } 975 976 static int dgram_sctp_free(BIO *a) 977 { 978 bio_dgram_sctp_data *data; 979 980 if (a == NULL) return(0); 981 if ( ! dgram_clear(a)) 982 return 0; 983 984 data = (bio_dgram_sctp_data *)a->ptr; 985 if(data != NULL) OPENSSL_free(data); 986 987 return(1); 988 } 989 990 #ifdef SCTP_AUTHENTICATION_EVENT 991 void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification *snp) 992 { 993 int ret; 994 struct sctp_authkey_event* authkeyevent = &snp->sn_auth_event; 995 996 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) 997 { 998 struct sctp_authkeyid authkeyid; 999 1000 /* delete key */ 1001 authkeyid.scact_keynumber = authkeyevent->auth_keynumber; 1002 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY, 1003 &authkeyid, sizeof(struct sctp_authkeyid)); 1004 } 1005 } 1006 #endif 1007 1008 static int dgram_sctp_read(BIO *b, char *out, int outl) 1009 { 1010 int ret = 0, n = 0, i, optval; 1011 socklen_t optlen; 1012 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr; 1013 union sctp_notification *snp; 1014 struct msghdr msg; 1015 struct iovec iov; 1016 struct cmsghdr *cmsg; 1017 char cmsgbuf[512]; 1018 1019 if (out != NULL) 1020 { 1021 clear_socket_error(); 1022 1023 do 1024 { 1025 memset(&data->rcvinfo, 0x00, sizeof(struct bio_dgram_sctp_rcvinfo)); 1026 iov.iov_base = out; 1027 iov.iov_len = outl; 1028 msg.msg_name = NULL; 1029 msg.msg_namelen = 0; 1030 msg.msg_iov = &iov; 1031 msg.msg_iovlen = 1; 1032 msg.msg_control = cmsgbuf; 1033 msg.msg_controllen = 512; 1034 msg.msg_flags = 0; 1035 n = recvmsg(b->num, &msg, 0); 1036 1037 if (msg.msg_controllen > 0) 1038 { 1039 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) 1040 { 1041 if (cmsg->cmsg_level != IPPROTO_SCTP) 1042 continue; 1043 #ifdef SCTP_RCVINFO 1044 if (cmsg->cmsg_type == SCTP_RCVINFO) 1045 { 1046 struct sctp_rcvinfo *rcvinfo; 1047 1048 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg); 1049 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid; 1050 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn; 1051 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags; 1052 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid; 1053 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn; 1054 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn; 1055 data->rcvinfo.rcv_context = rcvinfo->rcv_context; 1056 } 1057 #endif 1058 #ifdef SCTP_SNDRCV 1059 if (cmsg->cmsg_type == SCTP_SNDRCV) 1060 { 1061 struct sctp_sndrcvinfo *sndrcvinfo; 1062 1063 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 1064 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream; 1065 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn; 1066 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags; 1067 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid; 1068 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn; 1069 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn; 1070 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context; 1071 } 1072 #endif 1073 } 1074 } 1075 1076 if (n <= 0) 1077 { 1078 if (n < 0) 1079 ret = n; 1080 break; 1081 } 1082 1083 if (msg.msg_flags & MSG_NOTIFICATION) 1084 { 1085 snp = (union sctp_notification*) out; 1086 if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) 1087 { 1088 #ifdef SCTP_EVENT 1089 struct sctp_event event; 1090 #else 1091 struct sctp_event_subscribe event; 1092 socklen_t eventsize; 1093 #endif 1094 /* If a message has been delayed until the socket 1095 * is dry, it can be sent now. 1096 */ 1097 if (data->saved_message.length > 0) 1098 { 1099 dgram_sctp_write(data->saved_message.bio, data->saved_message.data, 1100 data->saved_message.length); 1101 OPENSSL_free(data->saved_message.data); 1102 data->saved_message.length = 0; 1103 } 1104 1105 /* disable sender dry event */ 1106 #ifdef SCTP_EVENT 1107 memset(&event, 0, sizeof(struct sctp_event)); 1108 event.se_assoc_id = 0; 1109 event.se_type = SCTP_SENDER_DRY_EVENT; 1110 event.se_on = 0; 1111 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event)); 1112 OPENSSL_assert(i >= 0); 1113 #else 1114 eventsize = sizeof(struct sctp_event_subscribe); 1115 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize); 1116 OPENSSL_assert(i >= 0); 1117 1118 event.sctp_sender_dry_event = 0; 1119 1120 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe)); 1121 OPENSSL_assert(i >= 0); 1122 #endif 1123 } 1124 1125 #ifdef SCTP_AUTHENTICATION_EVENT 1126 if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) 1127 dgram_sctp_handle_auth_free_key_event(b, snp); 1128 #endif 1129 1130 if (data->handle_notifications != NULL) 1131 data->handle_notifications(b, data->notification_context, (void*) out); 1132 1133 memset(out, 0, outl); 1134 } 1135 else 1136 ret += n; 1137 } 1138 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) && (ret < outl)); 1139 1140 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) 1141 { 1142 /* Partial message read, this should never happen! */ 1143 1144 /* The buffer was too small, this means the peer sent 1145 * a message that was larger than allowed. */ 1146 if (ret == outl) 1147 return -1; 1148 1149 /* Test if socket buffer can handle max record 1150 * size (2^14 + 2048 + 13) 1151 */ 1152 optlen = (socklen_t) sizeof(int); 1153 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen); 1154 OPENSSL_assert(ret >= 0); 1155 OPENSSL_assert(optval >= 18445); 1156 1157 /* Test if SCTP doesn't partially deliver below 1158 * max record size (2^14 + 2048 + 13) 1159 */ 1160 optlen = (socklen_t) sizeof(int); 1161 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, 1162 &optval, &optlen); 1163 OPENSSL_assert(ret >= 0); 1164 OPENSSL_assert(optval >= 18445); 1165 1166 /* Partially delivered notification??? Probably a bug.... */ 1167 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION)); 1168 1169 /* Everything seems ok till now, so it's most likely 1170 * a message dropped by PR-SCTP. 1171 */ 1172 memset(out, 0, outl); 1173 BIO_set_retry_read(b); 1174 return -1; 1175 } 1176 1177 BIO_clear_retry_flags(b); 1178 if (ret < 0) 1179 { 1180 if (BIO_dgram_should_retry(ret)) 1181 { 1182 BIO_set_retry_read(b); 1183 data->_errno = get_last_socket_error(); 1184 } 1185 } 1186 1187 /* Test if peer uses SCTP-AUTH before continuing */ 1188 if (!data->peer_auth_tested) 1189 { 1190 int ii, auth_data = 0, auth_forward = 0; 1191 unsigned char *p; 1192 struct sctp_authchunks *authchunks; 1193 1194 optlen = (socklen_t)(sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t)); 1195 authchunks = OPENSSL_malloc(optlen); 1196 memset(authchunks, 0, sizeof(optlen)); 1197 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, authchunks, &optlen); 1198 OPENSSL_assert(ii >= 0); 1199 1200 for (p = (unsigned char*) authchunks->gauth_chunks; 1201 p < (unsigned char*) authchunks + optlen; 1202 p += sizeof(uint8_t)) 1203 { 1204 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) auth_data = 1; 1205 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) auth_forward = 1; 1206 } 1207 1208 OPENSSL_free(authchunks); 1209 1210 if (!auth_data || !auth_forward) 1211 { 1212 BIOerr(BIO_F_DGRAM_SCTP_READ,BIO_R_CONNECT_ERROR); 1213 return -1; 1214 } 1215 1216 data->peer_auth_tested = 1; 1217 } 1218 } 1219 return(ret); 1220 } 1221 1222 static int dgram_sctp_write(BIO *b, const char *in, int inl) 1223 { 1224 int ret; 1225 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr; 1226 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo); 1227 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo); 1228 struct bio_dgram_sctp_sndinfo handshake_sinfo; 1229 struct iovec iov[1]; 1230 struct msghdr msg; 1231 struct cmsghdr *cmsg; 1232 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO) 1233 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + CMSG_SPACE(sizeof(struct sctp_prinfo))]; 1234 struct sctp_sndinfo *sndinfo; 1235 struct sctp_prinfo *prinfo; 1236 #else 1237 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; 1238 struct sctp_sndrcvinfo *sndrcvinfo; 1239 #endif 1240 1241 clear_socket_error(); 1242 1243 /* If we're send anything else than application data, 1244 * disable all user parameters and flags. 1245 */ 1246 if (in[0] != 23) { 1247 memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo)); 1248 #ifdef SCTP_SACK_IMMEDIATELY 1249 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY; 1250 #endif 1251 sinfo = &handshake_sinfo; 1252 } 1253 1254 /* If we have to send a shutdown alert message and the 1255 * socket is not dry yet, we have to save it and send it 1256 * as soon as the socket gets dry. 1257 */ 1258 if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) 1259 { 1260 data->saved_message.bio = b; 1261 data->saved_message.length = inl; 1262 data->saved_message.data = OPENSSL_malloc(inl); 1263 memcpy(data->saved_message.data, in, inl); 1264 return inl; 1265 } 1266 1267 iov[0].iov_base = (char *)in; 1268 iov[0].iov_len = inl; 1269 msg.msg_name = NULL; 1270 msg.msg_namelen = 0; 1271 msg.msg_iov = iov; 1272 msg.msg_iovlen = 1; 1273 msg.msg_control = (caddr_t)cmsgbuf; 1274 msg.msg_controllen = 0; 1275 msg.msg_flags = 0; 1276 #if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO) 1277 cmsg = (struct cmsghdr *)cmsgbuf; 1278 cmsg->cmsg_level = IPPROTO_SCTP; 1279 cmsg->cmsg_type = SCTP_SNDINFO; 1280 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo)); 1281 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg); 1282 memset(sndinfo, 0, sizeof(struct sctp_sndinfo)); 1283 sndinfo->snd_sid = sinfo->snd_sid; 1284 sndinfo->snd_flags = sinfo->snd_flags; 1285 sndinfo->snd_ppid = sinfo->snd_ppid; 1286 sndinfo->snd_context = sinfo->snd_context; 1287 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo)); 1288 1289 cmsg = (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))]; 1290 cmsg->cmsg_level = IPPROTO_SCTP; 1291 cmsg->cmsg_type = SCTP_PRINFO; 1292 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo)); 1293 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg); 1294 memset(prinfo, 0, sizeof(struct sctp_prinfo)); 1295 prinfo->pr_policy = pinfo->pr_policy; 1296 prinfo->pr_value = pinfo->pr_value; 1297 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo)); 1298 #else 1299 cmsg = (struct cmsghdr *)cmsgbuf; 1300 cmsg->cmsg_level = IPPROTO_SCTP; 1301 cmsg->cmsg_type = SCTP_SNDRCV; 1302 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); 1303 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); 1304 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo)); 1305 sndrcvinfo->sinfo_stream = sinfo->snd_sid; 1306 sndrcvinfo->sinfo_flags = sinfo->snd_flags; 1307 #ifdef __FreeBSD__ 1308 sndrcvinfo->sinfo_flags |= pinfo->pr_policy; 1309 #endif 1310 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid; 1311 sndrcvinfo->sinfo_context = sinfo->snd_context; 1312 sndrcvinfo->sinfo_timetolive = pinfo->pr_value; 1313 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo)); 1314 #endif 1315 1316 ret = sendmsg(b->num, &msg, 0); 1317 1318 BIO_clear_retry_flags(b); 1319 if (ret <= 0) 1320 { 1321 if (BIO_dgram_should_retry(ret)) 1322 { 1323 BIO_set_retry_write(b); 1324 data->_errno = get_last_socket_error(); 1325 } 1326 } 1327 return(ret); 1328 } 1329 1330 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr) 1331 { 1332 long ret=1; 1333 bio_dgram_sctp_data *data = NULL; 1334 socklen_t sockopt_len = 0; 1335 struct sctp_authkeyid authkeyid; 1336 struct sctp_authkey *authkey = NULL; 1337 1338 data = (bio_dgram_sctp_data *)b->ptr; 1339 1340 switch (cmd) 1341 { 1342 case BIO_CTRL_DGRAM_QUERY_MTU: 1343 /* Set to maximum (2^14) 1344 * and ignore user input to enable transport 1345 * protocol fragmentation. 1346 * Returns always 2^14. 1347 */ 1348 data->mtu = 16384; 1349 ret = data->mtu; 1350 break; 1351 case BIO_CTRL_DGRAM_SET_MTU: 1352 /* Set to maximum (2^14) 1353 * and ignore input to enable transport 1354 * protocol fragmentation. 1355 * Returns always 2^14. 1356 */ 1357 data->mtu = 16384; 1358 ret = data->mtu; 1359 break; 1360 case BIO_CTRL_DGRAM_SET_CONNECTED: 1361 case BIO_CTRL_DGRAM_CONNECT: 1362 /* Returns always -1. */ 1363 ret = -1; 1364 break; 1365 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT: 1366 /* SCTP doesn't need the DTLS timer 1367 * Returns always 1. 1368 */ 1369 break; 1370 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE: 1371 if (num > 0) 1372 data->in_handshake = 1; 1373 else 1374 data->in_handshake = 0; 1375 1376 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, &data->in_handshake, sizeof(int)); 1377 break; 1378 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY: 1379 /* New shared key for SCTP AUTH. 1380 * Returns 0 on success, -1 otherwise. 1381 */ 1382 1383 /* Get active key */ 1384 sockopt_len = sizeof(struct sctp_authkeyid); 1385 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len); 1386 if (ret < 0) break; 1387 1388 /* Add new key */ 1389 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t); 1390 authkey = OPENSSL_malloc(sockopt_len); 1391 if (authkey == NULL) 1392 { 1393 ret = -1; 1394 break; 1395 } 1396 memset(authkey, 0x00, sockopt_len); 1397 authkey->sca_keynumber = authkeyid.scact_keynumber + 1; 1398 #ifndef __FreeBSD__ 1399 /* This field is missing in FreeBSD 8.2 and earlier, 1400 * and FreeBSD 8.3 and higher work without it. 1401 */ 1402 authkey->sca_keylength = 64; 1403 #endif 1404 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t)); 1405 1406 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, sockopt_len); 1407 OPENSSL_free(authkey); 1408 authkey = NULL; 1409 if (ret < 0) break; 1410 1411 /* Reset active key */ 1412 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, 1413 &authkeyid, sizeof(struct sctp_authkeyid)); 1414 if (ret < 0) break; 1415 1416 break; 1417 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY: 1418 /* Returns 0 on success, -1 otherwise. */ 1419 1420 /* Get active key */ 1421 sockopt_len = sizeof(struct sctp_authkeyid); 1422 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len); 1423 if (ret < 0) break; 1424 1425 /* Set active key */ 1426 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1; 1427 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, 1428 &authkeyid, sizeof(struct sctp_authkeyid)); 1429 if (ret < 0) break; 1430 1431 /* CCS has been sent, so remember that and fall through 1432 * to check if we need to deactivate an old key 1433 */ 1434 data->ccs_sent = 1; 1435 1436 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD: 1437 /* Returns 0 on success, -1 otherwise. */ 1438 1439 /* Has this command really been called or is this just a fall-through? */ 1440 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD) 1441 data->ccs_rcvd = 1; 1442 1443 /* CSS has been both, received and sent, so deactivate an old key */ 1444 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) 1445 { 1446 /* Get active key */ 1447 sockopt_len = sizeof(struct sctp_authkeyid); 1448 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, &sockopt_len); 1449 if (ret < 0) break; 1450 1451 /* Deactivate key or delete second last key if 1452 * SCTP_AUTHENTICATION_EVENT is not available. 1453 */ 1454 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1; 1455 #ifdef SCTP_AUTH_DEACTIVATE_KEY 1456 sockopt_len = sizeof(struct sctp_authkeyid); 1457 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY, 1458 &authkeyid, sockopt_len); 1459 if (ret < 0) break; 1460 #endif 1461 #ifndef SCTP_AUTHENTICATION_EVENT 1462 if (authkeyid.scact_keynumber > 0) 1463 { 1464 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1; 1465 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY, 1466 &authkeyid, sizeof(struct sctp_authkeyid)); 1467 if (ret < 0) break; 1468 } 1469 #endif 1470 1471 data->ccs_rcvd = 0; 1472 data->ccs_sent = 0; 1473 } 1474 break; 1475 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO: 1476 /* Returns the size of the copied struct. */ 1477 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo)) 1478 num = sizeof(struct bio_dgram_sctp_sndinfo); 1479 1480 memcpy(ptr, &(data->sndinfo), num); 1481 ret = num; 1482 break; 1483 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO: 1484 /* Returns the size of the copied struct. */ 1485 if (num > (long) sizeof(struct bio_dgram_sctp_sndinfo)) 1486 num = sizeof(struct bio_dgram_sctp_sndinfo); 1487 1488 memcpy(&(data->sndinfo), ptr, num); 1489 break; 1490 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO: 1491 /* Returns the size of the copied struct. */ 1492 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo)) 1493 num = sizeof(struct bio_dgram_sctp_rcvinfo); 1494 1495 memcpy(ptr, &data->rcvinfo, num); 1496 1497 ret = num; 1498 break; 1499 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO: 1500 /* Returns the size of the copied struct. */ 1501 if (num > (long) sizeof(struct bio_dgram_sctp_rcvinfo)) 1502 num = sizeof(struct bio_dgram_sctp_rcvinfo); 1503 1504 memcpy(&(data->rcvinfo), ptr, num); 1505 break; 1506 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO: 1507 /* Returns the size of the copied struct. */ 1508 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo)) 1509 num = sizeof(struct bio_dgram_sctp_prinfo); 1510 1511 memcpy(ptr, &(data->prinfo), num); 1512 ret = num; 1513 break; 1514 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO: 1515 /* Returns the size of the copied struct. */ 1516 if (num > (long) sizeof(struct bio_dgram_sctp_prinfo)) 1517 num = sizeof(struct bio_dgram_sctp_prinfo); 1518 1519 memcpy(&(data->prinfo), ptr, num); 1520 break; 1521 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN: 1522 /* Returns always 1. */ 1523 if (num > 0) 1524 data->save_shutdown = 1; 1525 else 1526 data->save_shutdown = 0; 1527 break; 1528 1529 default: 1530 /* Pass to default ctrl function to 1531 * process SCTP unspecific commands 1532 */ 1533 ret=dgram_ctrl(b, cmd, num, ptr); 1534 break; 1535 } 1536 return(ret); 1537 } 1538 1539 int BIO_dgram_sctp_notification_cb(BIO *b, 1540 void (*handle_notifications)(BIO *bio, void *context, void *buf), 1541 void *context) 1542 { 1543 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; 1544 1545 if (handle_notifications != NULL) 1546 { 1547 data->handle_notifications = handle_notifications; 1548 data->notification_context = context; 1549 } 1550 else 1551 return -1; 1552 1553 return 0; 1554 } 1555 1556 int BIO_dgram_sctp_wait_for_dry(BIO *b) 1557 { 1558 int is_dry = 0; 1559 int n, sockflags, ret; 1560 union sctp_notification snp; 1561 struct msghdr msg; 1562 struct iovec iov; 1563 #ifdef SCTP_EVENT 1564 struct sctp_event event; 1565 #else 1566 struct sctp_event_subscribe event; 1567 socklen_t eventsize; 1568 #endif 1569 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr; 1570 1571 /* set sender dry event */ 1572 #ifdef SCTP_EVENT 1573 memset(&event, 0, sizeof(struct sctp_event)); 1574 event.se_assoc_id = 0; 1575 event.se_type = SCTP_SENDER_DRY_EVENT; 1576 event.se_on = 1; 1577 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event)); 1578 #else 1579 eventsize = sizeof(struct sctp_event_subscribe); 1580 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize); 1581 if (ret < 0) 1582 return -1; 1583 1584 event.sctp_sender_dry_event = 1; 1585 1586 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe)); 1587 #endif 1588 if (ret < 0) 1589 return -1; 1590 1591 /* peek for notification */ 1592 memset(&snp, 0x00, sizeof(union sctp_notification)); 1593 iov.iov_base = (char *)&snp; 1594 iov.iov_len = sizeof(union sctp_notification); 1595 msg.msg_name = NULL; 1596 msg.msg_namelen = 0; 1597 msg.msg_iov = &iov; 1598 msg.msg_iovlen = 1; 1599 msg.msg_control = NULL; 1600 msg.msg_controllen = 0; 1601 msg.msg_flags = 0; 1602 1603 n = recvmsg(b->num, &msg, MSG_PEEK); 1604 if (n <= 0) 1605 { 1606 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK)) 1607 return -1; 1608 else 1609 return 0; 1610 } 1611 1612 /* if we find a notification, process it and try again if necessary */ 1613 while (msg.msg_flags & MSG_NOTIFICATION) 1614 { 1615 memset(&snp, 0x00, sizeof(union sctp_notification)); 1616 iov.iov_base = (char *)&snp; 1617 iov.iov_len = sizeof(union sctp_notification); 1618 msg.msg_name = NULL; 1619 msg.msg_namelen = 0; 1620 msg.msg_iov = &iov; 1621 msg.msg_iovlen = 1; 1622 msg.msg_control = NULL; 1623 msg.msg_controllen = 0; 1624 msg.msg_flags = 0; 1625 1626 n = recvmsg(b->num, &msg, 0); 1627 if (n <= 0) 1628 { 1629 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK)) 1630 return -1; 1631 else 1632 return is_dry; 1633 } 1634 1635 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) 1636 { 1637 is_dry = 1; 1638 1639 /* disable sender dry event */ 1640 #ifdef SCTP_EVENT 1641 memset(&event, 0, sizeof(struct sctp_event)); 1642 event.se_assoc_id = 0; 1643 event.se_type = SCTP_SENDER_DRY_EVENT; 1644 event.se_on = 0; 1645 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event)); 1646 #else 1647 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe); 1648 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize); 1649 if (ret < 0) 1650 return -1; 1651 1652 event.sctp_sender_dry_event = 0; 1653 1654 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, sizeof(struct sctp_event_subscribe)); 1655 #endif 1656 if (ret < 0) 1657 return -1; 1658 } 1659 1660 #ifdef SCTP_AUTHENTICATION_EVENT 1661 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) 1662 dgram_sctp_handle_auth_free_key_event(b, &snp); 1663 #endif 1664 1665 if (data->handle_notifications != NULL) 1666 data->handle_notifications(b, data->notification_context, (void*) &snp); 1667 1668 /* found notification, peek again */ 1669 memset(&snp, 0x00, sizeof(union sctp_notification)); 1670 iov.iov_base = (char *)&snp; 1671 iov.iov_len = sizeof(union sctp_notification); 1672 msg.msg_name = NULL; 1673 msg.msg_namelen = 0; 1674 msg.msg_iov = &iov; 1675 msg.msg_iovlen = 1; 1676 msg.msg_control = NULL; 1677 msg.msg_controllen = 0; 1678 msg.msg_flags = 0; 1679 1680 /* if we have seen the dry already, don't wait */ 1681 if (is_dry) 1682 { 1683 sockflags = fcntl(b->num, F_GETFL, 0); 1684 fcntl(b->num, F_SETFL, O_NONBLOCK); 1685 } 1686 1687 n = recvmsg(b->num, &msg, MSG_PEEK); 1688 1689 if (is_dry) 1690 { 1691 fcntl(b->num, F_SETFL, sockflags); 1692 } 1693 1694 if (n <= 0) 1695 { 1696 if ((n < 0) && (get_last_socket_error() != EAGAIN) && (get_last_socket_error() != EWOULDBLOCK)) 1697 return -1; 1698 else 1699 return is_dry; 1700 } 1701 } 1702 1703 /* read anything else */ 1704 return is_dry; 1705 } 1706 1707 int BIO_dgram_sctp_msg_waiting(BIO *b) 1708 { 1709 int n, sockflags; 1710 union sctp_notification snp; 1711 struct msghdr msg; 1712 struct iovec iov; 1713 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *)b->ptr; 1714 1715 /* Check if there are any messages waiting to be read */ 1716 do 1717 { 1718 memset(&snp, 0x00, sizeof(union sctp_notification)); 1719 iov.iov_base = (char *)&snp; 1720 iov.iov_len = sizeof(union sctp_notification); 1721 msg.msg_name = NULL; 1722 msg.msg_namelen = 0; 1723 msg.msg_iov = &iov; 1724 msg.msg_iovlen = 1; 1725 msg.msg_control = NULL; 1726 msg.msg_controllen = 0; 1727 msg.msg_flags = 0; 1728 1729 sockflags = fcntl(b->num, F_GETFL, 0); 1730 fcntl(b->num, F_SETFL, O_NONBLOCK); 1731 n = recvmsg(b->num, &msg, MSG_PEEK); 1732 fcntl(b->num, F_SETFL, sockflags); 1733 1734 /* if notification, process and try again */ 1735 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) 1736 { 1737 #ifdef SCTP_AUTHENTICATION_EVENT 1738 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) 1739 dgram_sctp_handle_auth_free_key_event(b, &snp); 1740 #endif 1741 1742 memset(&snp, 0x00, sizeof(union sctp_notification)); 1743 iov.iov_base = (char *)&snp; 1744 iov.iov_len = sizeof(union sctp_notification); 1745 msg.msg_name = NULL; 1746 msg.msg_namelen = 0; 1747 msg.msg_iov = &iov; 1748 msg.msg_iovlen = 1; 1749 msg.msg_control = NULL; 1750 msg.msg_controllen = 0; 1751 msg.msg_flags = 0; 1752 n = recvmsg(b->num, &msg, 0); 1753 1754 if (data->handle_notifications != NULL) 1755 data->handle_notifications(b, data->notification_context, (void*) &snp); 1756 } 1757 1758 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)); 1759 1760 /* Return 1 if there is a message to be read, return 0 otherwise. */ 1761 if (n > 0) 1762 return 1; 1763 else 1764 return 0; 1765 } 1766 1767 static int dgram_sctp_puts(BIO *bp, const char *str) 1768 { 1769 int n,ret; 1770 1771 n=strlen(str); 1772 ret=dgram_sctp_write(bp,str,n); 1773 return(ret); 1774 } 1775 #endif 1776 1777 static int BIO_dgram_should_retry(int i) 1778 { 1779 int err; 1780 1781 if ((i == 0) || (i == -1)) 1782 { 1783 err=get_last_socket_error(); 1784 1785 #if defined(OPENSSL_SYS_WINDOWS) 1786 /* If the socket return value (i) is -1 1787 * and err is unexpectedly 0 at this point, 1788 * the error code was overwritten by 1789 * another system call before this error 1790 * handling is called. 1791 */ 1792 #endif 1793 1794 return(BIO_dgram_non_fatal_error(err)); 1795 } 1796 return(0); 1797 } 1798 1799 int BIO_dgram_non_fatal_error(int err) 1800 { 1801 switch (err) 1802 { 1803 #if defined(OPENSSL_SYS_WINDOWS) 1804 # if defined(WSAEWOULDBLOCK) 1805 case WSAEWOULDBLOCK: 1806 # endif 1807 1808 # if 0 /* This appears to always be an error */ 1809 # if defined(WSAENOTCONN) 1810 case WSAENOTCONN: 1811 # endif 1812 # endif 1813 #endif 1814 1815 #ifdef EWOULDBLOCK 1816 # ifdef WSAEWOULDBLOCK 1817 # if WSAEWOULDBLOCK != EWOULDBLOCK 1818 case EWOULDBLOCK: 1819 # endif 1820 # else 1821 case EWOULDBLOCK: 1822 # endif 1823 #endif 1824 1825 #ifdef EINTR 1826 case EINTR: 1827 #endif 1828 1829 #ifdef EAGAIN 1830 #if EWOULDBLOCK != EAGAIN 1831 case EAGAIN: 1832 # endif 1833 #endif 1834 1835 #ifdef EPROTO 1836 case EPROTO: 1837 #endif 1838 1839 #ifdef EINPROGRESS 1840 case EINPROGRESS: 1841 #endif 1842 1843 #ifdef EALREADY 1844 case EALREADY: 1845 #endif 1846 1847 return(1); 1848 /* break; */ 1849 default: 1850 break; 1851 } 1852 return(0); 1853 } 1854 1855 static void get_current_time(struct timeval *t) 1856 { 1857 #ifdef OPENSSL_SYS_WIN32 1858 struct _timeb tb; 1859 _ftime(&tb); 1860 t->tv_sec = (long)tb.time; 1861 t->tv_usec = (long)tb.millitm * 1000; 1862 #elif defined(OPENSSL_SYS_VMS) 1863 struct timeb tb; 1864 ftime(&tb); 1865 t->tv_sec = (long)tb.time; 1866 t->tv_usec = (long)tb.millitm * 1000; 1867 #else 1868 gettimeofday(t, NULL); 1869 #endif 1870 } 1871 1872 #endif 1873
