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 #ifndef NO_SOCK
  60
  61 #include <stdio.h>
  62 #include <errno.h>
  63 #define USE_SOCKETS
  64 #include "cryptlib.h"
  65 #include <openssl/bio.h>
  66
  67 #ifdef WIN16
  68 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  69 #else
  70 #define SOCKET_PROTOCOL IPPROTO_TCP
  71 #endif
  72
  73 #if (defined(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
  79 typedef struct bio_connect_st
  80         {
  81         int state;
  82
  83         char *param_hostname;
  84         char *param_port;
  85         int nbio;
  86
  87         unsigned char ip[4];
  88         unsigned short port;
  89
  90         struct sockaddr_in them;
  91
  92         /* int socket; this will be kept in bio->num so that it is
  93          * compatible with the bss_sock bio */
  94
  95         /* called when the connection is initially made
  96          *  callback(BIO,state,ret);  The callback should return
  97          * 'ret'.  state is for compatibility with the ssl info_callback */
  98         int (*info_callback)();
  99         } BIO_CONNECT;
 100
 101 union int_fn_to_char_u
 102         {
 103         char *char_p;
 104         int (*fn_p)();
 105         };
 106
 107 static int conn_write(BIO *h,char *buf,int num);
 108 static int conn_read(BIO *h,char *buf,int size);
 109 static int conn_puts(BIO *h,char *str);
 110 static long conn_ctrl(BIO *h,int cmd,long arg1,char *arg2);
 111 static int conn_new(BIO *h);
 112 static int conn_free(BIO *data);
 113
 114 static int conn_state(BIO *b, BIO_CONNECT *c);
 115 static void conn_close_socket(BIO *data);
 116 BIO_CONNECT *BIO_CONNECT_new(void );
 117 void BIO_CONNECT_free(BIO_CONNECT *a);
 118
 119 static BIO_METHOD methods_connectp=
 120         {
 121         BIO_TYPE_CONNECT,
 122         "socket connect",
 123         conn_write,
 124         conn_read,
 125         conn_puts,
 126         NULL, /* connect_gets, */
 127         conn_ctrl,
 128         conn_new,
 129         conn_free,
 130         };
 131
 132 static int conn_state(BIO *b, BIO_CONNECT *c)
 133         {
 134         int ret= -1,i;
 135         unsigned long l;
 136         char *p,*q;
 137         int (*cb)()=NULL;
 138
 139         if (c->info_callback != NULL)
 140                 cb=c->info_callback;
 141
 142         for (;;)
 143                 {
 144                 switch (c->state)
 145                         {
 146                 case BIO_CONN_S_BEFORE:
 147                         p=c->param_hostname;
 148                         if (p == NULL)
 149                                 {
 150                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NO_HOSTNAME_SPECIFIED);
 151                                 goto exit_loop;
 152                                 }
 153                         for ( ; *p != '\0'; p++)
 154                                 {
 155                                 if ((*p == ':') || (*p == '/')) break;
 156                                 }
 157
 158                         i= *p;
 159                         if ((i == ':') || (i == '/'))
 160                                 {
 161
 162                                 *(p++)='\0';
 163                                 if (i == ':')
 164                                         {
 165                                         for (q=p; *q; q++)
 166                                                 if (*q == '/')
 167                                                         {
 168                                                         *q='\0';
 169                                                         break;
 170                                                         }
 171                                         if (c->param_port != NULL)
 172                                                 Free(c->param_port);
 173                                         c->param_port=BUF_strdup(p);
 174                                         }
 175                                 }
 176
 177                         if (c->param_port == NULL)
 178                                 {
 179                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NO_PORT_SPECIFIED);
 180                                 ERR_add_error_data(2,"host=",c->param_hostname);
 181                                 goto exit_loop;
 182                                 }
 183                         c->state=BIO_CONN_S_GET_IP;
 184                         break;
 185
 186                 case BIO_CONN_S_GET_IP:
 187                         if (BIO_get_host_ip(c->param_hostname,&(c->ip[0])) <= 0)
 188                                 goto exit_loop;
 189                         c->state=BIO_CONN_S_GET_PORT;
 190                         break;
 191
 192                 case BIO_CONN_S_GET_PORT:
 193                         if (c->param_port == NULL)
 194                                 {
 195                                 abort();
 196                                 goto exit_loop;
 197                                 }
 198                         else if (BIO_get_port(c->param_port,&c->port) <= 0)
 199                                 goto exit_loop;
 200                         c->state=BIO_CONN_S_CREATE_SOCKET;
 201                         break;
 202
 203                 case BIO_CONN_S_CREATE_SOCKET:
 204                         /* now setup address */
 205                         memset((char *)&c->them,0,sizeof(c->them));
 206                         c->them.sin_family=AF_INET;
 207                         c->them.sin_port=htons((unsigned short)c->port);
 208                         l=(unsigned long)
 209                                 ((unsigned long)c->ip[0]<<24L)|
 210                                 ((unsigned long)c->ip[1]<<16L)|
 211                                 ((unsigned long)c->ip[2]<< 8L)|
 212                                 ((unsigned long)c->ip[3]);
 213                         c->them.sin_addr.s_addr=htonl(l);
 214                         c->state=BIO_CONN_S_CREATE_SOCKET;
 215
 216                         ret=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 217                         if (ret == INVALID_SOCKET)
 218                                 {
 219                                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 220                                 ERR_add_error_data(4,"host=",c->param_hostname,
 221                                         ":",c->param_port);
 222                                 BIOerr(BIO_F_CONN_STATE,BIO_R_UNABLE_TO_CREATE_SOCKET);
 223                                 goto exit_loop;
 224                                 }
 225                         b->num=ret;
 226                         c->state=BIO_CONN_S_NBIO;
 227                         break;
 228
 229                 case BIO_CONN_S_NBIO:
 230                         if (c->nbio)
 231                                 {
 232                                 if (!BIO_socket_nbio(b->num,1))
 233                                         {
 234                                         BIOerr(BIO_F_CONN_STATE,BIO_R_ERROR_SETTING_NBIO);
 235                                         ERR_add_error_data(4,"host=",
 236                                                 c->param_hostname,
 237                                                 ":",c->param_port);
 238                                         goto exit_loop;
 239                                         }
 240                                 }
 241                         c->state=BIO_CONN_S_CONNECT;
 242
 243 #ifdef SO_KEEPALIVE
 244                         i=1;
 245                         i=setsockopt(b->num,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 246                         if (i < 0)
 247                                 {
 248                                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 249                                 ERR_add_error_data(4,"host=",c->param_hostname,
 250                                         ":",c->param_port);
 251                                 BIOerr(BIO_F_CONN_STATE,BIO_R_KEEPALIVE);
 252                                 goto exit_loop;
 253                                 }
 254 #endif
 255                         break;
 256
 257                 case BIO_CONN_S_CONNECT:
 258                         BIO_clear_retry_flags(b);
 259                         ret=connect(b->num,
 260                                 (struct sockaddr *)&c->them,
 261                                 sizeof(c->them));
 262                         b->retry_reason=0;
 263                         if (ret < 0)
 264                                 {
 265                                 if (BIO_sock_should_retry(ret))
 266                                         {
 267                                         BIO_set_retry_special(b);
 268                                         c->state=BIO_CONN_S_BLOCKED_CONNECT;
 269                                         b->retry_reason=BIO_RR_CONNECT;
 270                                         }
 271                                 else
 272                                         {
 273                                         SYSerr(SYS_F_CONNECT,get_last_socket_error());
 274                                         ERR_add_error_data(4,"host=",
 275                                                 c->param_hostname,
 276                                                 ":",c->param_port);
 277                                         BIOerr(BIO_F_CONN_STATE,BIO_R_CONNECT_ERROR);
 278                                         }
 279                                 goto exit_loop;
 280                                 }
 281                         else
 282                                 c->state=BIO_CONN_S_OK;
 283                         break;
 284
 285                 case BIO_CONN_S_BLOCKED_CONNECT:
 286                         i=BIO_sock_error(b->num);
 287                         if (i)
 288                                 {
 289                                 BIO_clear_retry_flags(b);
 290                                 SYSerr(SYS_F_CONNECT,i);
 291                                 ERR_add_error_data(4,"host=",
 292                                         c->param_hostname,
 293                                         ":",c->param_port);
 294                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NBIO_CONNECT_ERROR);
 295                                 ret=0;
 296                                 goto exit_loop;
 297                                 }
 298                         else
 299                                 c->state=BIO_CONN_S_OK;
 300                         break;
 301
 302                 case BIO_CONN_S_OK:
 303                         ret=1;
 304                         goto exit_loop;
 305                 default:
 306                         abort();
 307                         goto exit_loop;
 308                         }
 309
 310                 if (cb != NULL)
 311                         {
 312                         if (!(ret=cb((BIO *)b,c->state,ret)))
 313                                 goto end;
 314                         }
 315                 }
 316
 317         /* Loop does not exit */
 318 exit_loop:
 319         if (cb != NULL)
 320                 ret=cb((BIO *)b,c->state,ret);
 321 end:
 322         return(ret);
 323         }
 324
 325 BIO_CONNECT *BIO_CONNECT_new(void)
 326         {
 327         BIO_CONNECT *ret;
 328
 329         if ((ret=(BIO_CONNECT *)Malloc(sizeof(BIO_CONNECT))) == NULL)
 330                 return(NULL);
 331         ret->state=BIO_CONN_S_BEFORE;
 332         ret->param_hostname=NULL;
 333         ret->param_port=NULL;
 334         ret->info_callback=NULL;
 335         ret->nbio=0;
 336         ret->ip[0]=0;
 337         ret->ip[1]=0;
 338         ret->ip[2]=0;
 339         ret->ip[3]=0;
 340         ret->port=0;
 341         memset((char *)&ret->them,0,sizeof(ret->them));
 342         return(ret);
 343         }
 344
 345 void BIO_CONNECT_free(BIO_CONNECT *a)
 346         {
 347         if(a == NULL)
 348             return;
 349
 350         if (a->param_hostname != NULL)
 351                 Free(a->param_hostname);
 352         if (a->param_port != NULL)
 353                 Free(a->param_port);
 354         Free(a);
 355         }
 356
 357 BIO_METHOD *BIO_s_connect(void)
 358         {
 359         return(&methods_connectp);
 360         }
 361
 362 static int conn_new(BIO *bi)
 363         {
 364         bi->init=0;
 365         bi->num=INVALID_SOCKET;
 366         bi->flags=0;
 367         if ((bi->ptr=(char *)BIO_CONNECT_new()) == NULL)
 368                 return(0);
 369         else
 370                 return(1);
 371         }
 372
 373 static void conn_close_socket(BIO *bio)
 374         {
 375         BIO_CONNECT *c;
 376
 377         c=(BIO_CONNECT *)bio->ptr;
 378         if (bio->num != INVALID_SOCKET)
 379                 {
 380                 /* Only do a shutdown if things were established */
 381                 if (c->state == BIO_CONN_S_OK)
 382                         shutdown(bio->num,2);
 383                 closesocket(bio->num);
 384                 bio->num=INVALID_SOCKET;
 385                 }
 386         }
 387
 388 static int conn_free(BIO *a)
 389         {
 390         BIO_CONNECT *data;
 391
 392         if (a == NULL) return(0);
 393         data=(BIO_CONNECT *)a->ptr;
 394
 395         if (a->shutdown)
 396                 {
 397                 conn_close_socket(a);
 398                 BIO_CONNECT_free(data);
 399                 a->ptr=NULL;
 400                 a->flags=0;
 401                 a->init=0;
 402                 }
 403         return(1);
 404         }
 405
 406 static int conn_read(BIO *b, char *out, int outl)
 407         {
 408         int ret=0;
 409         BIO_CONNECT *data;
 410
 411         data=(BIO_CONNECT *)b->ptr;
 412         if (data->state != BIO_CONN_S_OK)
 413                 {
 414                 ret=conn_state(b,data);
 415                 if (ret <= 0)
 416                                 return(ret);
 417                 }
 418
 419         if (out != NULL)
 420                 {
 421                 clear_socket_error();
 422                 ret=readsocket(b->num,out,outl);
 423                 BIO_clear_retry_flags(b);
 424                 if (ret <= 0)
 425                         {
 426                         if (BIO_sock_should_retry(ret))
 427                                 BIO_set_retry_read(b);
 428                         }
 429                 }
 430         return(ret);
 431         }
 432
 433 static int conn_write(BIO *b, char *in, int inl)
 434         {
 435         int ret;
 436         BIO_CONNECT *data;
 437
 438         data=(BIO_CONNECT *)b->ptr;
 439         if (data->state != BIO_CONN_S_OK)
 440                 {
 441                 ret=conn_state(b,data);
 442                 if (ret <= 0) return(ret);
 443                 }
 444
 445         clear_socket_error();
 446         ret=writesocket(b->num,in,inl);
 447         BIO_clear_retry_flags(b);
 448         if (ret <= 0)
 449                 {
 450                 if (BIO_sock_should_retry(ret))
 451                         BIO_set_retry_write(b);
 452                 }
 453         return(ret);
 454         }
 455
 456 static long conn_ctrl(BIO *b, int cmd, long num, char *ptr)
 457         {
 458         BIO *dbio;
 459         int *ip;
 460         const char **pptr;
 461         long ret=1;
 462         BIO_CONNECT *data;
 463
 464         data=(BIO_CONNECT *)b->ptr;
 465
 466         switch (cmd)
 467                 {
 468         case BIO_CTRL_RESET:
 469                 ret=0;
 470                 data->state=BIO_CONN_S_BEFORE;
 471                 conn_close_socket(b);
 472                 b->flags=0;
 473                 break;
 474         case BIO_C_DO_STATE_MACHINE:
 475                 /* use this one to start the connection */
 476                 if (!data->state != BIO_CONN_S_OK)
 477                         ret=(long)conn_state(b,data);
 478                 else
 479                         ret=1;
 480                 break;
 481         case BIO_C_GET_CONNECT:
 482                 if (ptr != NULL)
 483                         {
 484                         pptr=(const char **)ptr;
 485                         if (num == 0)
 486                                 {
 487                                 *pptr=data->param_hostname;
 488
 489                                 }
 490                         else if (num == 1)
 491                                 {
 492                                 *pptr=data->param_port;
 493                                 }
 494                         else if (num == 2)
 495                                 {
 496                                 *pptr= (char *)&(data->ip[0]);
 497                                 }
 498                         else if (num == 3)
 499                                 {
 500                                 *((int *)ptr)=data->port;
 501                                 }
 502                         if ((!b->init) || (ptr == NULL))
 503                                 *pptr="not initialized";
 504                         ret=1;
 505                         }
 506                 break;
 507         case BIO_C_SET_CONNECT:
 508                 if (ptr != NULL)
 509                         {
 510                         b->init=1;
 511                         if (num == 0)
 512                                 {
 513                                 if (data->param_hostname != NULL)
 514                                         Free(data->param_hostname);
 515                                 data->param_hostname=BUF_strdup(ptr);
 516                                 }
 517                         else if (num == 1)
 518                                 {
 519                                 if (data->param_port != NULL)
 520                                         Free(data->param_port);
 521                                 data->param_port=BUF_strdup(ptr);
 522                                 }
 523                         else if (num == 2)
 524                                 {
 525                                 char buf[16];
 526
 527                                 sprintf(buf,"%d.%d.%d.%d",
 528                                         ptr[0],ptr[1],ptr[2],ptr[3]);
 529                                 if (data->param_hostname != NULL)
 530                                         Free(data->param_hostname);
 531                                 data->param_hostname=BUF_strdup(buf);
 532                                 memcpy(&(data->ip[0]),ptr,4);
 533                                 }
 534                         else if (num == 3)
 535                                 {
 536                                 char buf[16];
 537
 538                                 sprintf(buf,"%d",*(int *)ptr);
 539                                 if (data->param_port != NULL)
 540                                         Free(data->param_port);
 541                                 data->param_port=BUF_strdup(buf);
 542                                 data->port= *(int *)ptr;
 543                                 }
 544                         }
 545                 break;
 546         case BIO_C_SET_NBIO:
 547                 data->nbio=(int)num;
 548                 break;
 549         case BIO_C_GET_FD:
 550                 if (b->init)
 551                         {
 552                         ip=(int *)ptr;
 553                         if (ip != NULL)
 554                                 *ip=b->num;
 555                         ret=b->num;
 556                         }
 557                 else
 558                         ret= -1;
 559                 break;
 560         case BIO_CTRL_GET_CLOSE:
 561                 ret=b->shutdown;
 562                 break;
 563         case BIO_CTRL_SET_CLOSE:
 564                 b->shutdown=(int)num;
 565                 break;
 566         case BIO_CTRL_PENDING:
 567         case BIO_CTRL_WPENDING:
 568                 ret=0;
 569                 break;
 570         case BIO_CTRL_FLUSH:
 571                 break;
 572         case BIO_CTRL_DUP:
 573                 {
 574                 union int_fn_to_char_u tmp_cb;
 575
 576                 dbio=(BIO *)ptr;
 577                 if (data->param_port)
 578                         BIO_set_conn_port(dbio,data->param_port);
 579                 if (data->param_hostname)
 580                         BIO_set_conn_hostname(dbio,data->param_hostname);
 581                 BIO_set_nbio(dbio,data->nbio);
 582                 tmp_cb.fn_p=data->info_callback;
 583                 (void)BIO_set_info_callback(dbio,tmp_cb.char_p);
 584                 }
 585                 break;
 586         case BIO_CTRL_SET_CALLBACK:
 587                 {
 588                 union int_fn_to_char_u tmp_cb;
 589
 590                 tmp_cb.char_p=ptr;
 591                 data->info_callback=tmp_cb.fn_p;
 592                 }
 593                 break;
 594         case BIO_CTRL_GET_CALLBACK:
 595                 {
 596                 int (**fptr)();
 597
 598                 fptr=(int (**)())ptr;
 599                 *fptr=data->info_callback;
 600                 }
 601                 break;
 602         default:
 603                 ret=0;
 604                 break;
 605                 }
 606         return(ret);
 607         }
 608
 609 static int conn_puts(BIO *bp, char *str)
 610         {
 611         int n,ret;
 612
 613         n=strlen(str);
 614         ret=conn_write(bp,str,n);
 615         return(ret);
 616         }
 617
 618 BIO *BIO_new_connect(char *str)
 619         {
 620         BIO *ret;
 621
 622         ret=BIO_new(BIO_s_connect());
 623         if (ret == NULL) return(NULL);
 624         if (BIO_set_conn_hostname(ret,str))
 625                 return(ret);
 626         else
 627                 {
 628                 BIO_free(ret);
 629                 return(NULL);
 630                 }
 631         }
 632
 633 #endif
 634