Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/bio/bio_dgram.c */ |
| 2 | /* |
| 3 | * DTLS implementation written by Nagendra Modadugu |
| 4 | * (nagendra@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@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@cryptsoft.com). This product includes software written by Tim |
| 56 | * Hudson (tjh@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 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 73 | #ifdef OPENSSL_SYS_LINUX |
| 74 | #define IP_MTU 14 /* linux is lame */ |
| 75 | #endif |
| 76 | |
| 77 | #ifdef WATT32 |
| 78 | #define sock_write SockWrite /* Watt-32 uses same names */ |
| 79 | #define sock_read SockRead |
| 80 | #define sock_puts SockPuts |
| 81 | #endif |
| 82 | |
| 83 | static int dgram_write(BIO *h, const char *buf, int num); |
| 84 | static int dgram_read(BIO *h, char *buf, int size); |
| 85 | static int dgram_puts(BIO *h, const char *str); |
| 86 | static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
| 87 | static int dgram_new(BIO *h); |
| 88 | static int dgram_free(BIO *data); |
| 89 | static int dgram_clear(BIO *bio); |
| 90 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 91 | static int BIO_dgram_should_retry(int s); |
| 92 | |
| 93 | static void get_current_time(struct timeval *t); |
| 94 | |
| 95 | static BIO_METHOD methods_dgramp= |
| 96 | { |
| 97 | BIO_TYPE_DGRAM, |
| 98 | "datagram socket", |
| 99 | dgram_write, |
| 100 | dgram_read, |
| 101 | dgram_puts, |
| 102 | NULL, /* dgram_gets, */ |
| 103 | dgram_ctrl, |
| 104 | dgram_new, |
| 105 | dgram_free, |
| 106 | NULL, |
| 107 | }; |
| 108 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 109 | typedef struct bio_dgram_data_st |
| 110 | { |
| 111 | union { |
| 112 | struct sockaddr sa; |
| 113 | struct sockaddr_in sa_in; |
| 114 | #if OPENSSL_USE_IPV6 |
| 115 | struct sockaddr_in6 sa_in6; |
| 116 | #endif |
| 117 | } peer; |
| 118 | unsigned int connected; |
| 119 | unsigned int _errno; |
| 120 | unsigned int mtu; |
| 121 | struct timeval next_timeout; |
| 122 | struct timeval socket_timeout; |
| 123 | } bio_dgram_data; |
| 124 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 125 | BIO_METHOD *BIO_s_datagram(void) |
| 126 | { |
| 127 | return(&methods_dgramp); |
| 128 | } |
| 129 | |
| 130 | BIO *BIO_new_dgram(int fd, int close_flag) |
| 131 | { |
| 132 | BIO *ret; |
| 133 | |
| 134 | ret=BIO_new(BIO_s_datagram()); |
| 135 | if (ret == NULL) return(NULL); |
| 136 | BIO_set_fd(ret,fd,close_flag); |
| 137 | return(ret); |
| 138 | } |
| 139 | |
| 140 | static int dgram_new(BIO *bi) |
| 141 | { |
| 142 | bio_dgram_data *data = NULL; |
| 143 | |
| 144 | bi->init=0; |
| 145 | bi->num=0; |
| 146 | data = OPENSSL_malloc(sizeof(bio_dgram_data)); |
| 147 | if (data == NULL) |
| 148 | return 0; |
| 149 | memset(data, 0x00, sizeof(bio_dgram_data)); |
| 150 | bi->ptr = data; |
| 151 | |
| 152 | bi->flags=0; |
| 153 | return(1); |
| 154 | } |
| 155 | |
| 156 | static int dgram_free(BIO *a) |
| 157 | { |
| 158 | bio_dgram_data *data; |
| 159 | |
| 160 | if (a == NULL) return(0); |
| 161 | if ( ! dgram_clear(a)) |
| 162 | return 0; |
| 163 | |
| 164 | data = (bio_dgram_data *)a->ptr; |
| 165 | if(data != NULL) OPENSSL_free(data); |
| 166 | |
| 167 | return(1); |
| 168 | } |
| 169 | |
| 170 | static int dgram_clear(BIO *a) |
| 171 | { |
| 172 | if (a == NULL) return(0); |
| 173 | if (a->shutdown) |
| 174 | { |
| 175 | if (a->init) |
| 176 | { |
| 177 | SHUTDOWN2(a->num); |
| 178 | } |
| 179 | a->init=0; |
| 180 | a->flags=0; |
| 181 | } |
| 182 | return(1); |
| 183 | } |
| 184 | |
| 185 | static void dgram_adjust_rcv_timeout(BIO *b) |
| 186 | { |
| 187 | #if defined(SO_RCVTIMEO) |
| 188 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; |
| 189 | int sz = sizeof(int); |
| 190 | |
| 191 | /* Is a timer active? */ |
| 192 | if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) |
| 193 | { |
| 194 | struct timeval timenow, timeleft; |
| 195 | |
| 196 | /* Read current socket timeout */ |
| 197 | #ifdef OPENSSL_SYS_WINDOWS |
| 198 | int timeout; |
| 199 | if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
| 200 | (void*)&timeout, &sz) < 0) |
| 201 | { perror("getsockopt"); } |
| 202 | else |
| 203 | { |
| 204 | data->socket_timeout.tv_sec = timeout / 1000; |
| 205 | data->socket_timeout.tv_usec = (timeout % 1000) * 1000; |
| 206 | } |
| 207 | #else |
| 208 | if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
| 209 | &(data->socket_timeout), (void *)&sz) < 0) |
| 210 | { perror("getsockopt"); } |
| 211 | #endif |
| 212 | |
| 213 | /* Get current time */ |
| 214 | get_current_time(&timenow); |
| 215 | |
| 216 | /* Calculate time left until timer expires */ |
| 217 | memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval)); |
| 218 | timeleft.tv_sec -= timenow.tv_sec; |
| 219 | timeleft.tv_usec -= timenow.tv_usec; |
| 220 | if (timeleft.tv_usec < 0) |
| 221 | { |
| 222 | timeleft.tv_sec--; |
| 223 | timeleft.tv_usec += 1000000; |
| 224 | } |
| 225 | |
| 226 | if (timeleft.tv_sec < 0) |
| 227 | { |
| 228 | timeleft.tv_sec = 0; |
| 229 | timeleft.tv_usec = 1; |
| 230 | } |
| 231 | |
| 232 | /* Adjust socket timeout if next handhake message timer |
| 233 | * will expire earlier. |
| 234 | */ |
| 235 | if ((data->socket_timeout.tv_sec == 0 && data->socket_timeout.tv_usec == 0) || |
| 236 | (data->socket_timeout.tv_sec > timeleft.tv_sec) || |
| 237 | (data->socket_timeout.tv_sec == timeleft.tv_sec && |
| 238 | data->socket_timeout.tv_usec >= timeleft.tv_usec)) |
| 239 | { |
| 240 | #ifdef OPENSSL_SYS_WINDOWS |
| 241 | timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000; |
| 242 | if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
| 243 | (void*)&timeout, sizeof(timeout)) < 0) |
| 244 | { perror("setsockopt"); } |
| 245 | #else |
| 246 | if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft, |
| 247 | sizeof(struct timeval)) < 0) |
| 248 | { perror("setsockopt"); } |
| 249 | #endif |
| 250 | } |
| 251 | } |
| 252 | #endif |
| 253 | } |
| 254 | |
| 255 | static void dgram_reset_rcv_timeout(BIO *b) |
| 256 | { |
| 257 | #if defined(SO_RCVTIMEO) |
| 258 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; |
| 259 | |
| 260 | /* Is a timer active? */ |
| 261 | if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) |
| 262 | { |
| 263 | #ifdef OPENSSL_SYS_WINDOWS |
| 264 | int timeout = data->socket_timeout.tv_sec * 1000 + |
| 265 | data->socket_timeout.tv_usec / 1000; |
| 266 | if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
| 267 | (void*)&timeout, sizeof(timeout)) < 0) |
| 268 | { perror("setsockopt"); } |
| 269 | #else |
| 270 | if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout), |
| 271 | sizeof(struct timeval)) < 0) |
| 272 | { perror("setsockopt"); } |
| 273 | #endif |
| 274 | } |
| 275 | #endif |
| 276 | } |
| 277 | |
| 278 | static int dgram_read(BIO *b, char *out, int outl) |
| 279 | { |
| 280 | int ret=0; |
| 281 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; |
| 282 | |
| 283 | struct { |
| 284 | /* |
| 285 | * See commentary in b_sock.c. <appro> |
| 286 | */ |
| 287 | union { size_t s; int i; } len; |
| 288 | union { |
| 289 | struct sockaddr sa; |
| 290 | struct sockaddr_in sa_in; |
| 291 | #if OPENSSL_USE_IPV6 |
| 292 | struct sockaddr_in6 sa_in6; |
| 293 | #endif |
| 294 | } peer; |
| 295 | } sa; |
| 296 | |
| 297 | sa.len.s=0; |
| 298 | sa.len.i=sizeof(sa.peer); |
| 299 | |
| 300 | if (out != NULL) |
| 301 | { |
| 302 | clear_socket_error(); |
| 303 | memset(&sa.peer, 0x00, sizeof(sa.peer)); |
| 304 | dgram_adjust_rcv_timeout(b); |
| 305 | ret=recvfrom(b->num,out,outl,0,&sa.peer.sa,(void *)&sa.len); |
| 306 | if (sizeof(sa.len.i)!=sizeof(sa.len.s) && sa.len.i==0) |
| 307 | { |
| 308 | OPENSSL_assert(sa.len.s<=sizeof(sa.peer)); |
| 309 | sa.len.i = (int)sa.len.s; |
| 310 | } |
| 311 | |
| 312 | if ( ! data->connected && ret >= 0) |
| 313 | BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer); |
| 314 | |
| 315 | BIO_clear_retry_flags(b); |
| 316 | if (ret < 0) |
| 317 | { |
| 318 | if (BIO_dgram_should_retry(ret)) |
| 319 | { |
| 320 | BIO_set_retry_read(b); |
| 321 | data->_errno = get_last_socket_error(); |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | dgram_reset_rcv_timeout(b); |
| 326 | } |
| 327 | return(ret); |
| 328 | } |
| 329 | |
| 330 | static int dgram_write(BIO *b, const char *in, int inl) |
| 331 | { |
| 332 | int ret; |
| 333 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; |
| 334 | clear_socket_error(); |
| 335 | |
| 336 | if ( data->connected ) |
| 337 | ret=writesocket(b->num,in,inl); |
| 338 | else |
| 339 | { |
| 340 | int peerlen = sizeof(data->peer); |
| 341 | |
| 342 | if (data->peer.sa.sa_family == AF_INET) |
| 343 | peerlen = sizeof(data->peer.sa_in); |
| 344 | #if OPENSSL_USE_IPV6 |
| 345 | else if (data->peer.sa.sa_family == AF_INET6) |
| 346 | peerlen = sizeof(data->peer.sa_in6); |
| 347 | #endif |
| 348 | #if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK) |
| 349 | ret=sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen); |
| 350 | #else |
| 351 | ret=sendto(b->num, in, inl, 0, &data->peer.sa, peerlen); |
| 352 | #endif |
| 353 | } |
| 354 | |
| 355 | BIO_clear_retry_flags(b); |
| 356 | if (ret <= 0) |
| 357 | { |
| 358 | if (BIO_dgram_should_retry(ret)) |
| 359 | { |
| 360 | BIO_set_retry_write(b); |
| 361 | data->_errno = get_last_socket_error(); |
| 362 | |
| 363 | #if 0 /* higher layers are responsible for querying MTU, if necessary */ |
| 364 | if ( data->_errno == EMSGSIZE) |
| 365 | /* retrieve the new MTU */ |
| 366 | BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL); |
| 367 | #endif |
| 368 | } |
| 369 | } |
| 370 | return(ret); |
| 371 | } |
| 372 | |
| 373 | static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr) |
| 374 | { |
| 375 | long ret=1; |
| 376 | int *ip; |
| 377 | struct sockaddr *to = NULL; |
| 378 | bio_dgram_data *data = NULL; |
| 379 | #if defined(IP_MTU_DISCOVER) || defined(IP_MTU) |
| 380 | long sockopt_val = 0; |
| 381 | unsigned int sockopt_len = 0; |
| 382 | #endif |
| 383 | #ifdef OPENSSL_SYS_LINUX |
| 384 | socklen_t addr_len; |
| 385 | union { |
| 386 | struct sockaddr sa; |
| 387 | struct sockaddr_in s4; |
| 388 | #if OPENSSL_USE_IPV6 |
| 389 | struct sockaddr_in6 s6; |
| 390 | #endif |
| 391 | } addr; |
| 392 | #endif |
| 393 | |
| 394 | data = (bio_dgram_data *)b->ptr; |
| 395 | |
| 396 | switch (cmd) |
| 397 | { |
| 398 | case BIO_CTRL_RESET: |
| 399 | num=0; |
| 400 | case BIO_C_FILE_SEEK: |
| 401 | ret=0; |
| 402 | break; |
| 403 | case BIO_C_FILE_TELL: |
| 404 | case BIO_CTRL_INFO: |
| 405 | ret=0; |
| 406 | break; |
| 407 | case BIO_C_SET_FD: |
| 408 | dgram_clear(b); |
| 409 | b->num= *((int *)ptr); |
| 410 | b->shutdown=(int)num; |
| 411 | b->init=1; |
| 412 | break; |
| 413 | case BIO_C_GET_FD: |
| 414 | if (b->init) |
| 415 | { |
| 416 | ip=(int *)ptr; |
| 417 | if (ip != NULL) *ip=b->num; |
| 418 | ret=b->num; |
| 419 | } |
| 420 | else |
| 421 | ret= -1; |
| 422 | break; |
| 423 | case BIO_CTRL_GET_CLOSE: |
| 424 | ret=b->shutdown; |
| 425 | break; |
| 426 | case BIO_CTRL_SET_CLOSE: |
| 427 | b->shutdown=(int)num; |
| 428 | break; |
| 429 | case BIO_CTRL_PENDING: |
| 430 | case BIO_CTRL_WPENDING: |
| 431 | ret=0; |
| 432 | break; |
| 433 | case BIO_CTRL_DUP: |
| 434 | case BIO_CTRL_FLUSH: |
| 435 | ret=1; |
| 436 | break; |
| 437 | case BIO_CTRL_DGRAM_CONNECT: |
| 438 | to = (struct sockaddr *)ptr; |
| 439 | #if 0 |
| 440 | if (connect(b->num, to, sizeof(struct sockaddr)) < 0) |
| 441 | { perror("connect"); ret = 0; } |
| 442 | else |
| 443 | { |
| 444 | #endif |
| 445 | switch (to->sa_family) |
| 446 | { |
| 447 | case AF_INET: |
| 448 | memcpy(&data->peer,to,sizeof(data->peer.sa_in)); |
| 449 | break; |
| 450 | #if OPENSSL_USE_IPV6 |
| 451 | case AF_INET6: |
| 452 | memcpy(&data->peer,to,sizeof(data->peer.sa_in6)); |
| 453 | break; |
| 454 | #endif |
| 455 | default: |
| 456 | memcpy(&data->peer,to,sizeof(data->peer.sa)); |
| 457 | break; |
| 458 | } |
| 459 | #if 0 |
| 460 | } |
| 461 | #endif |
| 462 | break; |
| 463 | /* (Linux)kernel sets DF bit on outgoing IP packets */ |
| 464 | case BIO_CTRL_DGRAM_MTU_DISCOVER: |
| 465 | #ifdef OPENSSL_SYS_LINUX |
| 466 | addr_len = (socklen_t)sizeof(addr); |
| 467 | memset((void *)&addr, 0, sizeof(addr)); |
| 468 | if (getsockname(b->num, &addr.sa, &addr_len) < 0) |
| 469 | { |
| 470 | ret = 0; |
| 471 | break; |
| 472 | } |
| 473 | sockopt_len = sizeof(sockopt_val); |
| 474 | switch (addr.sa.sa_family) |
| 475 | { |
| 476 | case AF_INET: |
| 477 | sockopt_val = IP_PMTUDISC_DO; |
| 478 | if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER, |
| 479 | &sockopt_val, sizeof(sockopt_val))) < 0) |
| 480 | perror("setsockopt"); |
| 481 | break; |
| 482 | #if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) |
| 483 | case AF_INET6: |
| 484 | sockopt_val = IPV6_PMTUDISC_DO; |
| 485 | if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER, |
| 486 | &sockopt_val, sizeof(sockopt_val))) < 0) |
| 487 | perror("setsockopt"); |
| 488 | break; |
| 489 | #endif |
| 490 | default: |
| 491 | ret = -1; |
| 492 | break; |
| 493 | } |
| 494 | ret = -1; |
| 495 | #else |
| 496 | break; |
| 497 | #endif |
| 498 | case BIO_CTRL_DGRAM_QUERY_MTU: |
| 499 | #ifdef OPENSSL_SYS_LINUX |
| 500 | addr_len = (socklen_t)sizeof(addr); |
| 501 | memset((void *)&addr, 0, sizeof(addr)); |
| 502 | if (getsockname(b->num, &addr.sa, &addr_len) < 0) |
| 503 | { |
| 504 | ret = 0; |
| 505 | break; |
| 506 | } |
| 507 | sockopt_len = sizeof(sockopt_val); |
| 508 | switch (addr.sa.sa_family) |
| 509 | { |
| 510 | case AF_INET: |
| 511 | if ((ret = getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val, |
| 512 | &sockopt_len)) < 0 || sockopt_val < 0) |
| 513 | { |
| 514 | ret = 0; |
| 515 | } |
| 516 | else |
| 517 | { |
| 518 | /* we assume that the transport protocol is UDP and no |
| 519 | * IP options are used. |
| 520 | */ |
| 521 | data->mtu = sockopt_val - 8 - 20; |
| 522 | ret = data->mtu; |
| 523 | } |
| 524 | break; |
| 525 | #if OPENSSL_USE_IPV6 && defined(IPV6_MTU) |
| 526 | case AF_INET6: |
| 527 | if ((ret = getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, (void *)&sockopt_val, |
| 528 | &sockopt_len)) < 0 || sockopt_val < 0) |
| 529 | { |
| 530 | ret = 0; |
| 531 | } |
| 532 | else |
| 533 | { |
| 534 | /* we assume that the transport protocol is UDP and no |
| 535 | * IPV6 options are used. |
| 536 | */ |
| 537 | data->mtu = sockopt_val - 8 - 40; |
| 538 | ret = data->mtu; |
| 539 | } |
| 540 | break; |
| 541 | #endif |
| 542 | default: |
| 543 | ret = 0; |
| 544 | break; |
| 545 | } |
| 546 | #else |
| 547 | ret = 0; |
| 548 | #endif |
| 549 | break; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 550 | case BIO_CTRL_DGRAM_GET_MTU: |
| 551 | return data->mtu; |
| 552 | break; |
| 553 | case BIO_CTRL_DGRAM_SET_MTU: |
| 554 | data->mtu = num; |
| 555 | ret = num; |
| 556 | break; |
| 557 | case BIO_CTRL_DGRAM_SET_CONNECTED: |
| 558 | to = (struct sockaddr *)ptr; |
| 559 | |
| 560 | if ( to != NULL) |
| 561 | { |
| 562 | data->connected = 1; |
| 563 | switch (to->sa_family) |
| 564 | { |
| 565 | case AF_INET: |
| 566 | memcpy(&data->peer,to,sizeof(data->peer.sa_in)); |
| 567 | break; |
| 568 | #if OPENSSL_USE_IPV6 |
| 569 | case AF_INET6: |
| 570 | memcpy(&data->peer,to,sizeof(data->peer.sa_in6)); |
| 571 | break; |
| 572 | #endif |
| 573 | default: |
| 574 | memcpy(&data->peer,to,sizeof(data->peer.sa)); |
| 575 | break; |
| 576 | } |
| 577 | } |
| 578 | else |
| 579 | { |
| 580 | data->connected = 0; |
| 581 | memset(&(data->peer), 0x00, sizeof(data->peer)); |
| 582 | } |
| 583 | break; |
| 584 | case BIO_CTRL_DGRAM_GET_PEER: |
| 585 | switch (data->peer.sa.sa_family) |
| 586 | { |
| 587 | case AF_INET: |
| 588 | ret=sizeof(data->peer.sa_in); |
| 589 | break; |
| 590 | #if OPENSSL_USE_IPV6 |
| 591 | case AF_INET6: |
| 592 | ret=sizeof(data->peer.sa_in6); |
| 593 | break; |
| 594 | #endif |
| 595 | default: |
| 596 | ret=sizeof(data->peer.sa); |
| 597 | break; |
| 598 | } |
| 599 | if (num==0 || num>ret) |
| 600 | num=ret; |
| 601 | memcpy(ptr,&data->peer,(ret=num)); |
| 602 | break; |
| 603 | case BIO_CTRL_DGRAM_SET_PEER: |
| 604 | to = (struct sockaddr *) ptr; |
| 605 | switch (to->sa_family) |
| 606 | { |
| 607 | case AF_INET: |
| 608 | memcpy(&data->peer,to,sizeof(data->peer.sa_in)); |
| 609 | break; |
| 610 | #if OPENSSL_USE_IPV6 |
| 611 | case AF_INET6: |
| 612 | memcpy(&data->peer,to,sizeof(data->peer.sa_in6)); |
| 613 | break; |
| 614 | #endif |
| 615 | default: |
| 616 | memcpy(&data->peer,to,sizeof(data->peer.sa)); |
| 617 | break; |
| 618 | } |
| 619 | break; |
| 620 | case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT: |
| 621 | memcpy(&(data->next_timeout), ptr, sizeof(struct timeval)); |
| 622 | break; |
| 623 | #if defined(SO_RCVTIMEO) |
| 624 | case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT: |
| 625 | #ifdef OPENSSL_SYS_WINDOWS |
| 626 | { |
| 627 | struct timeval *tv = (struct timeval *)ptr; |
| 628 | int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000; |
| 629 | if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
| 630 | (void*)&timeout, sizeof(timeout)) < 0) |
| 631 | { perror("setsockopt"); ret = -1; } |
| 632 | } |
| 633 | #else |
| 634 | if ( setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr, |
| 635 | sizeof(struct timeval)) < 0) |
| 636 | { perror("setsockopt"); ret = -1; } |
| 637 | #endif |
| 638 | break; |
| 639 | case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT: |
| 640 | #ifdef OPENSSL_SYS_WINDOWS |
| 641 | { |
| 642 | int timeout, sz = sizeof(timeout); |
| 643 | struct timeval *tv = (struct timeval *)ptr; |
| 644 | if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
| 645 | (void*)&timeout, &sz) < 0) |
| 646 | { perror("getsockopt"); ret = -1; } |
| 647 | else |
| 648 | { |
| 649 | tv->tv_sec = timeout / 1000; |
| 650 | tv->tv_usec = (timeout % 1000) * 1000; |
| 651 | ret = sizeof(*tv); |
| 652 | } |
| 653 | } |
| 654 | #else |
| 655 | if ( getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
| 656 | ptr, (void *)&ret) < 0) |
| 657 | { perror("getsockopt"); ret = -1; } |
| 658 | #endif |
| 659 | break; |
| 660 | #endif |
| 661 | #if defined(SO_SNDTIMEO) |
| 662 | case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT: |
| 663 | #ifdef OPENSSL_SYS_WINDOWS |
| 664 | { |
| 665 | struct timeval *tv = (struct timeval *)ptr; |
| 666 | int timeout = tv->tv_sec * 1000 + tv->tv_usec/1000; |
| 667 | if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, |
| 668 | (void*)&timeout, sizeof(timeout)) < 0) |
| 669 | { perror("setsockopt"); ret = -1; } |
| 670 | } |
| 671 | #else |
| 672 | if ( setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr, |
| 673 | sizeof(struct timeval)) < 0) |
| 674 | { perror("setsockopt"); ret = -1; } |
| 675 | #endif |
| 676 | break; |
| 677 | case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT: |
| 678 | #ifdef OPENSSL_SYS_WINDOWS |
| 679 | { |
| 680 | int timeout, sz = sizeof(timeout); |
| 681 | struct timeval *tv = (struct timeval *)ptr; |
| 682 | if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, |
| 683 | (void*)&timeout, &sz) < 0) |
| 684 | { perror("getsockopt"); ret = -1; } |
| 685 | else |
| 686 | { |
| 687 | tv->tv_sec = timeout / 1000; |
| 688 | tv->tv_usec = (timeout % 1000) * 1000; |
| 689 | ret = sizeof(*tv); |
| 690 | } |
| 691 | } |
| 692 | #else |
| 693 | if ( getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, |
| 694 | ptr, (void *)&ret) < 0) |
| 695 | { perror("getsockopt"); ret = -1; } |
| 696 | #endif |
| 697 | break; |
| 698 | #endif |
| 699 | case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP: |
| 700 | /* fall-through */ |
| 701 | case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP: |
| 702 | #ifdef OPENSSL_SYS_WINDOWS |
| 703 | if ( data->_errno == WSAETIMEDOUT) |
| 704 | #else |
| 705 | if ( data->_errno == EAGAIN) |
| 706 | #endif |
| 707 | { |
| 708 | ret = 1; |
| 709 | data->_errno = 0; |
| 710 | } |
| 711 | else |
| 712 | ret = 0; |
| 713 | break; |
| 714 | #ifdef EMSGSIZE |
| 715 | case BIO_CTRL_DGRAM_MTU_EXCEEDED: |
| 716 | if ( data->_errno == EMSGSIZE) |
| 717 | { |
| 718 | ret = 1; |
| 719 | data->_errno = 0; |
| 720 | } |
| 721 | else |
| 722 | ret = 0; |
| 723 | break; |
| 724 | #endif |
| 725 | default: |
| 726 | ret=0; |
| 727 | break; |
| 728 | } |
| 729 | return(ret); |
| 730 | } |
| 731 | |
| 732 | static int dgram_puts(BIO *bp, const char *str) |
| 733 | { |
| 734 | int n,ret; |
| 735 | |
| 736 | n=strlen(str); |
| 737 | ret=dgram_write(bp,str,n); |
| 738 | return(ret); |
| 739 | } |
| 740 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 741 | static int BIO_dgram_should_retry(int i) |
| 742 | { |
| 743 | int err; |
| 744 | |
| 745 | if ((i == 0) || (i == -1)) |
| 746 | { |
| 747 | err=get_last_socket_error(); |
| 748 | |
| 749 | #if defined(OPENSSL_SYS_WINDOWS) |
| 750 | /* If the socket return value (i) is -1 |
| 751 | * and err is unexpectedly 0 at this point, |
| 752 | * the error code was overwritten by |
| 753 | * another system call before this error |
| 754 | * handling is called. |
| 755 | */ |
| 756 | #endif |
| 757 | |
| 758 | return(BIO_dgram_non_fatal_error(err)); |
| 759 | } |
| 760 | return(0); |
| 761 | } |
| 762 | |
| 763 | int BIO_dgram_non_fatal_error(int err) |
| 764 | { |
| 765 | switch (err) |
| 766 | { |
| 767 | #if defined(OPENSSL_SYS_WINDOWS) |
| 768 | # if defined(WSAEWOULDBLOCK) |
| 769 | case WSAEWOULDBLOCK: |
| 770 | # endif |
| 771 | |
| 772 | # if 0 /* This appears to always be an error */ |
| 773 | # if defined(WSAENOTCONN) |
| 774 | case WSAENOTCONN: |
| 775 | # endif |
| 776 | # endif |
| 777 | #endif |
| 778 | |
| 779 | #ifdef EWOULDBLOCK |
| 780 | # ifdef WSAEWOULDBLOCK |
| 781 | # if WSAEWOULDBLOCK != EWOULDBLOCK |
| 782 | case EWOULDBLOCK: |
| 783 | # endif |
| 784 | # else |
| 785 | case EWOULDBLOCK: |
| 786 | # endif |
| 787 | #endif |
| 788 | |
| 789 | #ifdef EINTR |
| 790 | case EINTR: |
| 791 | #endif |
| 792 | |
| 793 | #ifdef EAGAIN |
| 794 | #if EWOULDBLOCK != EAGAIN |
| 795 | case EAGAIN: |
| 796 | # endif |
| 797 | #endif |
| 798 | |
| 799 | #ifdef EPROTO |
| 800 | case EPROTO: |
| 801 | #endif |
| 802 | |
| 803 | #ifdef EINPROGRESS |
| 804 | case EINPROGRESS: |
| 805 | #endif |
| 806 | |
| 807 | #ifdef EALREADY |
| 808 | case EALREADY: |
| 809 | #endif |
| 810 | |
| 811 | return(1); |
| 812 | /* break; */ |
| 813 | default: |
| 814 | break; |
| 815 | } |
| 816 | return(0); |
| 817 | } |
| 818 | |
| 819 | static void get_current_time(struct timeval *t) |
| 820 | { |
| 821 | #ifdef OPENSSL_SYS_WIN32 |
| 822 | struct _timeb tb; |
| 823 | _ftime(&tb); |
| 824 | t->tv_sec = (long)tb.time; |
| 825 | t->tv_usec = (long)tb.millitm * 1000; |
| 826 | #elif defined(OPENSSL_SYS_VMS) |
| 827 | struct timeb tb; |
| 828 | ftime(&tb); |
| 829 | t->tv_sec = (long)tb.time; |
| 830 | t->tv_usec = (long)tb.millitm * 1000; |
| 831 | #else |
| 832 | gettimeofday(t, NULL); |
| 833 | #endif |
| 834 | } |
| 835 | |
| 836 | #endif |