release/src-rt-6.x.4708/router/openssl/crypto/bio/bss_conn.c

   1 /* crypto/bio/bss_conn.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <errno.h>
  61 #define USE_SOCKETS
  62 #include "cryptlib.h"
  63 #include <openssl/bio.h>
  64
  65 #ifndef OPENSSL_NO_SOCK
  66
  67 # ifdef OPENSSL_SYS_WIN16
  68 #  define SOCKET_PROTOCOL 0     /* more microsoft stupidity */
  69 # else
  70 #  define SOCKET_PROTOCOL IPPROTO_TCP
  71 # endif
  72
  73 # if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
  74 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
  75 #  undef FIONBIO
  76 # endif
  77
  78 typedef struct bio_connect_st {
  79     int state;
  80     char *param_hostname;
  81     char *param_port;
  82     int nbio;
  83     unsigned char ip[4];
  84     unsigned short port;
  85     struct sockaddr_in them;
  86     /*
  87      * int socket; this will be kept in bio->num so that it is compatible
  88      * with the bss_sock bio
  89      */
  90     /*
  91      * called when the connection is initially made callback(BIO,state,ret);
  92      * The callback should return 'ret'.  state is for compatibility with the
  93      * ssl info_callback
  94      */
  95     int (*info_callback) (const BIO *bio, int state, int ret);
  96 } BIO_CONNECT;
  97
  98 static int conn_write(BIO *h, const char *buf, int num);
  99 static int conn_read(BIO *h, char *buf, int size);
 100 static int conn_puts(BIO *h, const char *str);
 101 static long conn_ctrl(BIO *h, int cmd, long arg1, void *arg2);
 102 static int conn_new(BIO *h);
 103 static int conn_free(BIO *data);
 104 static long conn_callback_ctrl(BIO *h, int cmd, bio_info_cb *);
 105
 106 static int conn_state(BIO *b, BIO_CONNECT *c);
 107 static void conn_close_socket(BIO *data);
 108 BIO_CONNECT *BIO_CONNECT_new(void);
 109 void BIO_CONNECT_free(BIO_CONNECT *a);
 110
 111 static BIO_METHOD methods_connectp = {
 112     BIO_TYPE_CONNECT,
 113     "socket connect",
 114     conn_write,
 115     conn_read,
 116     conn_puts,
 117     NULL,                       /* connect_gets, */
 118     conn_ctrl,
 119     conn_new,
 120     conn_free,
 121     conn_callback_ctrl,
 122 };
 123
 124 static int conn_state(BIO *b, BIO_CONNECT *c)
 125 {
 126     int ret = -1, i;
 127     unsigned long l;
 128     char *p, *q;
 129     int (*cb) (const BIO *, int, int) = NULL;
 130
 131     if (c->info_callback != NULL)
 132         cb = c->info_callback;
 133
 134     for (;;) {
 135         switch (c->state) {
 136         case BIO_CONN_S_BEFORE:
 137             p = c->param_hostname;
 138             if (p == NULL) {
 139                 BIOerr(BIO_F_CONN_STATE, BIO_R_NO_HOSTNAME_SPECIFIED);
 140                 goto exit_loop;
 141             }
 142             for (; *p != '\0'; p++) {
 143                 if ((*p == ':') || (*p == '/'))
 144                     break;
 145             }
 146
 147             i = *p;
 148             if ((i == ':') || (i == '/')) {
 149
 150                 *(p++) = '\0';
 151                 if (i == ':') {
 152                     for (q = p; *q; q++)
 153                         if (*q == '/') {
 154                             *q = '\0';
 155                             break;
 156                         }
 157                     if (c->param_port != NULL)
 158                         OPENSSL_free(c->param_port);
 159                     c->param_port = BUF_strdup(p);
 160                 }
 161             }
 162
 163             if (c->param_port == NULL) {
 164                 BIOerr(BIO_F_CONN_STATE, BIO_R_NO_PORT_SPECIFIED);
 165                 ERR_add_error_data(2, "host=", c->param_hostname);
 166                 goto exit_loop;
 167             }
 168             c->state = BIO_CONN_S_GET_IP;
 169             break;
 170
 171         case BIO_CONN_S_GET_IP:
 172             if (BIO_get_host_ip(c->param_hostname, &(c->ip[0])) <= 0)
 173                 goto exit_loop;
 174             c->state = BIO_CONN_S_GET_PORT;
 175             break;
 176
 177         case BIO_CONN_S_GET_PORT:
 178             if (c->param_port == NULL) {
 179                 /* abort(); */
 180                 goto exit_loop;
 181             } else if (BIO_get_port(c->param_port, &c->port) <= 0)
 182                 goto exit_loop;
 183             c->state = BIO_CONN_S_CREATE_SOCKET;
 184             break;
 185
 186         case BIO_CONN_S_CREATE_SOCKET:
 187             /* now setup address */
 188             memset((char *)&c->them, 0, sizeof(c->them));
 189             c->them.sin_family = AF_INET;
 190             c->them.sin_port = htons((unsigned short)c->port);
 191             l = (unsigned long)
 192                 ((unsigned long)c->ip[0] << 24L) |
 193                 ((unsigned long)c->ip[1] << 16L) |
 194                 ((unsigned long)c->ip[2] << 8L) | ((unsigned long)c->ip[3]);
 195             c->them.sin_addr.s_addr = htonl(l);
 196             c->state = BIO_CONN_S_CREATE_SOCKET;
 197
 198             ret = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL);
 199             if (ret == INVALID_SOCKET) {
 200                 SYSerr(SYS_F_SOCKET, get_last_socket_error());
 201                 ERR_add_error_data(4, "host=", c->param_hostname,
 202                                    ":", c->param_port);
 203                 BIOerr(BIO_F_CONN_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET);
 204                 goto exit_loop;
 205             }
 206             b->num = ret;
 207             c->state = BIO_CONN_S_NBIO;
 208             break;
 209
 210         case BIO_CONN_S_NBIO:
 211             if (c->nbio) {
 212                 if (!BIO_socket_nbio(b->num, 1)) {
 213                     BIOerr(BIO_F_CONN_STATE, BIO_R_ERROR_SETTING_NBIO);
 214                     ERR_add_error_data(4, "host=",
 215                                        c->param_hostname, ":", c->param_port);
 216                     goto exit_loop;
 217                 }
 218             }
 219             c->state = BIO_CONN_S_CONNECT;
 220
 221 # if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
 222             i = 1;
 223             i = setsockopt(b->num, SOL_SOCKET, SO_KEEPALIVE, (char *)&i,
 224                            sizeof(i));
 225             if (i < 0) {
 226                 SYSerr(SYS_F_SOCKET, get_last_socket_error());
 227                 ERR_add_error_data(4, "host=", c->param_hostname,
 228                                    ":", c->param_port);
 229                 BIOerr(BIO_F_CONN_STATE, BIO_R_KEEPALIVE);
 230                 goto exit_loop;
 231             }
 232 # endif
 233             break;
 234
 235         case BIO_CONN_S_CONNECT:
 236             BIO_clear_retry_flags(b);
 237             ret = connect(b->num,
 238                           (struct sockaddr *)&c->them, sizeof(c->them));
 239             b->retry_reason = 0;
 240             if (ret < 0) {
 241                 if (BIO_sock_should_retry(ret)) {
 242                     BIO_set_retry_special(b);
 243                     c->state = BIO_CONN_S_BLOCKED_CONNECT;
 244                     b->retry_reason = BIO_RR_CONNECT;
 245                 } else {
 246                     SYSerr(SYS_F_CONNECT, get_last_socket_error());
 247                     ERR_add_error_data(4, "host=",
 248                                        c->param_hostname, ":", c->param_port);
 249                     BIOerr(BIO_F_CONN_STATE, BIO_R_CONNECT_ERROR);
 250                 }
 251                 goto exit_loop;
 252             } else
 253                 c->state = BIO_CONN_S_OK;
 254             break;
 255
 256         case BIO_CONN_S_BLOCKED_CONNECT:
 257             i = BIO_sock_error(b->num);
 258             if (i) {
 259                 BIO_clear_retry_flags(b);
 260                 SYSerr(SYS_F_CONNECT, i);
 261                 ERR_add_error_data(4, "host=",
 262                                    c->param_hostname, ":", c->param_port);
 263                 BIOerr(BIO_F_CONN_STATE, BIO_R_NBIO_CONNECT_ERROR);
 264                 ret = 0;
 265                 goto exit_loop;
 266             } else
 267                 c->state = BIO_CONN_S_OK;
 268             break;
 269
 270         case BIO_CONN_S_OK:
 271             ret = 1;
 272             goto exit_loop;
 273         default:
 274             /* abort(); */
 275             goto exit_loop;
 276         }
 277
 278         if (cb != NULL) {
 279             if (!(ret = cb((BIO *)b, c->state, ret)))
 280                 goto end;
 281         }
 282     }
 283
 284     /* Loop does not exit */
 285  exit_loop:
 286     if (cb != NULL)
 287         ret = cb((BIO *)b, c->state, ret);
 288  end:
 289     return (ret);
 290 }
 291
 292 BIO_CONNECT *BIO_CONNECT_new(void)
 293 {
 294     BIO_CONNECT *ret;
 295
 296     if ((ret = (BIO_CONNECT *)OPENSSL_malloc(sizeof(BIO_CONNECT))) == NULL)
 297         return (NULL);
 298     ret->state = BIO_CONN_S_BEFORE;
 299     ret->param_hostname = NULL;
 300     ret->param_port = NULL;
 301     ret->info_callback = NULL;
 302     ret->nbio = 0;
 303     ret->ip[0] = 0;
 304     ret->ip[1] = 0;
 305     ret->ip[2] = 0;
 306     ret->ip[3] = 0;
 307     ret->port = 0;
 308     memset((char *)&ret->them, 0, sizeof(ret->them));
 309     return (ret);
 310 }
 311
 312 void BIO_CONNECT_free(BIO_CONNECT *a)
 313 {
 314     if (a == NULL)
 315         return;
 316
 317     if (a->param_hostname != NULL)
 318         OPENSSL_free(a->param_hostname);
 319     if (a->param_port != NULL)
 320         OPENSSL_free(a->param_port);
 321     OPENSSL_free(a);
 322 }
 323
 324 BIO_METHOD *BIO_s_connect(void)
 325 {
 326     return (&methods_connectp);
 327 }
 328
 329 static int conn_new(BIO *bi)
 330 {
 331     bi->init = 0;
 332     bi->num = INVALID_SOCKET;
 333     bi->flags = 0;
 334     if ((bi->ptr = (char *)BIO_CONNECT_new()) == NULL)
 335         return (0);
 336     else
 337         return (1);
 338 }
 339
 340 static void conn_close_socket(BIO *bio)
 341 {
 342     BIO_CONNECT *c;
 343
 344     c = (BIO_CONNECT *)bio->ptr;
 345     if (bio->num != INVALID_SOCKET) {
 346         /* Only do a shutdown if things were established */
 347         if (c->state == BIO_CONN_S_OK)
 348             shutdown(bio->num, 2);
 349         closesocket(bio->num);
 350         bio->num = INVALID_SOCKET;
 351     }
 352 }
 353
 354 static int conn_free(BIO *a)
 355 {
 356     BIO_CONNECT *data;
 357
 358     if (a == NULL)
 359         return (0);
 360     data = (BIO_CONNECT *)a->ptr;
 361
 362     if (a->shutdown) {
 363         conn_close_socket(a);
 364         BIO_CONNECT_free(data);
 365         a->ptr = NULL;
 366         a->flags = 0;
 367         a->init = 0;
 368     }
 369     return (1);
 370 }
 371
 372 static int conn_read(BIO *b, char *out, int outl)
 373 {
 374     int ret = 0;
 375     BIO_CONNECT *data;
 376
 377     data = (BIO_CONNECT *)b->ptr;
 378     if (data->state != BIO_CONN_S_OK) {
 379         ret = conn_state(b, data);
 380         if (ret <= 0)
 381             return (ret);
 382     }
 383
 384     if (out != NULL) {
 385         clear_socket_error();
 386         ret = readsocket(b->num, out, outl);
 387         BIO_clear_retry_flags(b);
 388         if (ret <= 0) {
 389             if (BIO_sock_should_retry(ret))
 390                 BIO_set_retry_read(b);
 391         }
 392     }
 393     return (ret);
 394 }
 395
 396 static int conn_write(BIO *b, const char *in, int inl)
 397 {
 398     int ret;
 399     BIO_CONNECT *data;
 400
 401     data = (BIO_CONNECT *)b->ptr;
 402     if (data->state != BIO_CONN_S_OK) {
 403         ret = conn_state(b, data);
 404         if (ret <= 0)
 405             return (ret);
 406     }
 407
 408     clear_socket_error();
 409     ret = writesocket(b->num, in, inl);
 410     BIO_clear_retry_flags(b);
 411     if (ret <= 0) {
 412         if (BIO_sock_should_retry(ret))
 413             BIO_set_retry_write(b);
 414     }
 415     return (ret);
 416 }
 417
 418 static long conn_ctrl(BIO *b, int cmd, long num, void *ptr)
 419 {
 420     BIO *dbio;
 421     int *ip;
 422     const char **pptr;
 423     long ret = 1;
 424     BIO_CONNECT *data;
 425
 426     data = (BIO_CONNECT *)b->ptr;
 427
 428     switch (cmd) {
 429     case BIO_CTRL_RESET:
 430         ret = 0;
 431         data->state = BIO_CONN_S_BEFORE;
 432         conn_close_socket(b);
 433         b->flags = 0;
 434         break;
 435     case BIO_C_DO_STATE_MACHINE:
 436         /* use this one to start the connection */
 437         if (data->state != BIO_CONN_S_OK)
 438             ret = (long)conn_state(b, data);
 439         else
 440             ret = 1;
 441         break;
 442     case BIO_C_GET_CONNECT:
 443         if (ptr != NULL) {
 444             pptr = (const char **)ptr;
 445             if (num == 0) {
 446                 *pptr = data->param_hostname;
 447
 448             } else if (num == 1) {
 449                 *pptr = data->param_port;
 450             } else if (num == 2) {
 451                 *pptr = (char *)&(data->ip[0]);
 452             } else if (num == 3) {
 453                 *((int *)ptr) = data->port;
 454             }
 455             if ((!b->init) || (ptr == NULL))
 456                 *pptr = "not initialized";
 457             ret = 1;
 458         }
 459         break;
 460     case BIO_C_SET_CONNECT:
 461         if (ptr != NULL) {
 462             b->init = 1;
 463             if (num == 0) {
 464                 if (data->param_hostname != NULL)
 465                     OPENSSL_free(data->param_hostname);
 466                 data->param_hostname = BUF_strdup(ptr);
 467             } else if (num == 1) {
 468                 if (data->param_port != NULL)
 469                     OPENSSL_free(data->param_port);
 470                 data->param_port = BUF_strdup(ptr);
 471             } else if (num == 2) {
 472                 char buf[16];
 473                 unsigned char *p = ptr;
 474
 475                 BIO_snprintf(buf, sizeof buf, "%d.%d.%d.%d",
 476                              p[0], p[1], p[2], p[3]);
 477                 if (data->param_hostname != NULL)
 478                     OPENSSL_free(data->param_hostname);
 479                 data->param_hostname = BUF_strdup(buf);
 480                 memcpy(&(data->ip[0]), ptr, 4);
 481             } else if (num == 3) {
 482                 char buf[DECIMAL_SIZE(int) + 1];
 483
 484                 BIO_snprintf(buf, sizeof buf, "%d", *(int *)ptr);
 485                 if (data->param_port != NULL)
 486                     OPENSSL_free(data->param_port);
 487                 data->param_port = BUF_strdup(buf);
 488                 data->port = *(int *)ptr;
 489             }
 490         }
 491         break;
 492     case BIO_C_SET_NBIO:
 493         data->nbio = (int)num;
 494         break;
 495     case BIO_C_GET_FD:
 496         if (b->init) {
 497             ip = (int *)ptr;
 498             if (ip != NULL)
 499                 *ip = b->num;
 500             ret = b->num;
 501         } else
 502             ret = -1;
 503         break;
 504     case BIO_CTRL_GET_CLOSE:
 505         ret = b->shutdown;
 506         break;
 507     case BIO_CTRL_SET_CLOSE:
 508         b->shutdown = (int)num;
 509         break;
 510     case BIO_CTRL_PENDING:
 511     case BIO_CTRL_WPENDING:
 512         ret = 0;
 513         break;
 514     case BIO_CTRL_FLUSH:
 515         break;
 516     case BIO_CTRL_DUP:
 517         {
 518             dbio = (BIO *)ptr;
 519             if (data->param_port)
 520                 BIO_set_conn_port(dbio, data->param_port);
 521             if (data->param_hostname)
 522                 BIO_set_conn_hostname(dbio, data->param_hostname);
 523             BIO_set_nbio(dbio, data->nbio);
 524             /*
 525              * FIXME: the cast of the function seems unlikely to be a good
 526              * idea
 527              */
 528             (void)BIO_set_info_callback(dbio,
 529                                         (bio_info_cb *)data->info_callback);
 530         }
 531         break;
 532     case BIO_CTRL_SET_CALLBACK:
 533         {
 534 # if 0                          /* FIXME: Should this be used? -- Richard
 535                                  * Levitte */
 536             BIOerr(BIO_F_CONN_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 537             ret = -1;
 538 # else
 539             ret = 0;
 540 # endif
 541         }
 542         break;
 543     case BIO_CTRL_GET_CALLBACK:
 544         {
 545             int (**fptr) (const BIO *bio, int state, int xret);
 546
 547             fptr = (int (**)(const BIO *bio, int state, int xret))ptr;
 548             *fptr = data->info_callback;
 549         }
 550         break;
 551     default:
 552         ret = 0;
 553         break;
 554     }
 555     return (ret);
 556 }
 557
 558 static long conn_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
 559 {
 560     long ret = 1;
 561     BIO_CONNECT *data;
 562
 563     data = (BIO_CONNECT *)b->ptr;
 564
 565     switch (cmd) {
 566     case BIO_CTRL_SET_CALLBACK:
 567         {
 568             data->info_callback =
 569                 (int (*)(const struct bio_st *, int, int))fp;
 570         }
 571         break;
 572     default:
 573         ret = 0;
 574         break;
 575     }
 576     return (ret);
 577 }
 578
 579 static int conn_puts(BIO *bp, const char *str)
 580 {
 581     int n, ret;
 582
 583     n = strlen(str);
 584     ret = conn_write(bp, str, n);
 585     return (ret);
 586 }
 587
 588 BIO *BIO_new_connect(const char *str)
 589 {
 590     BIO *ret;
 591
 592     ret = BIO_new(BIO_s_connect());
 593     if (ret == NULL)
 594         return (NULL);
 595     if (BIO_set_conn_hostname(ret, str))
 596         return (ret);
 597     else {
 598         BIO_free(ret);
 599         return (NULL);
 600     }
 601 }
 602
 603 #endif