crypto/bio/bss_dgram.c

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