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 "bio.h"
  66
  67 /*      BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */
  68
  69 #ifdef WIN16
  70 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  71 #else
  72 #define SOCKET_PROTOCOL IPPROTO_TCP
  73 #endif
  74
  75 typedef struct bio_connect_st
  76         {
  77         int state;
  78
  79         char *param_hostname;
  80         char *param_port;
  81         int nbio;
  82
  83         unsigned char ip[4];
  84         unsigned short port;
  85
  86         struct sockaddr_in them;
  87
  88         /* int socket; this will be kept in bio->num so that it is
  89          * compatable with the bss_sock bio */
  90
  91         /* called when the connection is initially made
  92          *  callback(BIO,state,ret);  The callback should return
  93          * 'ret'.  state is for compatablity with the ssl info_callback */
  94         int (*info_callback)();
  95         } BIO_CONNECT;
  96
  97 #ifndef NOPROTO
  98 static int conn_write(BIO *h,char *buf,int num);
  99 static int conn_read(BIO *h,char *buf,int size);
 100 static int conn_puts(BIO *h,char *str);
 101 static long conn_ctrl(BIO *h,int cmd,long arg1,char *arg2);
 102 static int conn_new(BIO *h);
 103 static int conn_free(BIO *data);
 104 #else
 105 static int conn_write();
 106 static int conn_read();
 107 static int conn_puts();
 108 static long conn_ctrl();
 109 static int conn_new();
 110 static int conn_free();
 111 #endif
 112
 113 #ifndef NOPROTO
 114
 115 static int conn_state(BIO *b, BIO_CONNECT *c);
 116 static void conn_close_socket(BIO *data);
 117 BIO_CONNECT *BIO_CONNECT_new(void );
 118 void BIO_CONNECT_free(BIO_CONNECT *a);
 119
 120 #else
 121
 122 static int conn_state();
 123 static void conn_close_socket();
 124 BIO_CONNECT *BIO_CONNECT_new();
 125 void BIO_CONNECT_free();
 126
 127 #endif
 128
 129 static BIO_METHOD methods_connectp=
 130         {
 131         BIO_TYPE_CONNECT,
 132         "socket connect",
 133         conn_write,
 134         conn_read,
 135         conn_puts,
 136         NULL, /* connect_gets, */
 137         conn_ctrl,
 138         conn_new,
 139         conn_free,
 140         };
 141
 142 static int conn_state(b,c)
 143 BIO *b;
 144 BIO_CONNECT *c;
 145         {
 146         int ret= -1,i;
 147         unsigned long l;
 148         char *p,*q;
 149         int (*cb)()=NULL;
 150
 151         if (c->info_callback != NULL)
 152                 cb=c->info_callback;
 153
 154         for (;;)
 155                 {
 156                 switch (c->state)
 157                         {
 158                 case BIO_CONN_S_BEFORE:
 159                         p=c->param_hostname;
 160                         if (p == NULL)
 161                                 {
 162                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NO_HOSTHNAME_SPECIFIED);
 163                                 goto exit_loop;
 164                                 }
 165                         for ( ; *p != '\0'; p++)
 166                                 {
 167                                 if ((*p == ':') || (*p == '/')) break;
 168                                 }
 169
 170                         i= *p;
 171                         if ((i == ':') || (i == '/'))
 172                                 {
 173
 174                                 *(p++)='\0';
 175                                 if (i == ':')
 176                                         {
 177                                         for (q=p; *q; q++)
 178                                                 if (*q == '/')
 179                                                         {
 180                                                         *q='\0';
 181                                                         break;
 182                                                         }
 183                                         if (c->param_port != NULL)
 184                                                 Free(c->param_port);
 185                                         c->param_port=BUF_strdup(p);
 186                                         }
 187                                 }
 188
 189                         if (c->param_port == NULL)
 190                                 {
 191                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NO_PORT_SPECIFIED);
 192                                 ERR_add_error_data(2,"host=",c->param_hostname);
 193                                 goto exit_loop;
 194                                 }
 195                         c->state=BIO_CONN_S_GET_IP;
 196                         break;
 197
 198                 case BIO_CONN_S_GET_IP:
 199                         if (BIO_get_host_ip(c->param_hostname,&(c->ip[0])) <= 0)
 200                                 goto exit_loop;
 201                         c->state=BIO_CONN_S_GET_PORT;
 202                         break;
 203
 204                 case BIO_CONN_S_GET_PORT:
 205                         if (c->param_port == NULL)
 206                                 {
 207                                 abort();
 208                                 goto exit_loop;
 209                                 }
 210                         else if (BIO_get_port(c->param_port,&c->port) <= 0)
 211                                 goto exit_loop;
 212                         c->state=BIO_CONN_S_CREATE_SOCKET;
 213                         break;
 214
 215                 case BIO_CONN_S_CREATE_SOCKET:
 216                         /* now setup address */
 217                         memset((char *)&c->them,0,sizeof(c->them));
 218                         c->them.sin_family=AF_INET;
 219                         c->them.sin_port=htons((unsigned short)c->port);
 220                         l=(unsigned long)
 221                                 ((unsigned long)c->ip[0]<<24L)|
 222                                 ((unsigned long)c->ip[1]<<16L)|
 223                                 ((unsigned long)c->ip[2]<< 8L)|
 224                                 ((unsigned long)c->ip[3]);
 225                         c->them.sin_addr.s_addr=htonl(l);
 226                         c->state=BIO_CONN_S_CREATE_SOCKET;
 227
 228                         ret=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 229                         if (ret == INVALID_SOCKET)
 230                                 {
 231                                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 232                                 ERR_add_error_data(4,"host=",c->param_hostname,
 233                                         ":",c->param_port);
 234                                 BIOerr(BIO_F_CONN_STATE,BIO_R_UNABLE_TO_CREATE_SOCKET);
 235                                 goto exit_loop;
 236                                 }
 237                         b->num=ret;
 238                         c->state=BIO_CONN_S_NBIO;
 239                         break;
 240
 241                 case BIO_CONN_S_NBIO:
 242                         if (c->nbio)
 243                                 {
 244                                 if (!BIO_socket_nbio(b->num,1))
 245                                         {
 246                                         BIOerr(BIO_F_CONN_STATE,BIO_R_ERROR_SETTING_NBIO);
 247                                         ERR_add_error_data(4,"host=",
 248                                                 c->param_hostname,
 249                                                 ":",c->param_port);
 250                                         goto exit_loop;
 251                                         }
 252                                 }
 253                         c->state=BIO_CONN_S_CONNECT;
 254
 255 #ifdef SO_KEEPALIVE
 256                         i=1;
 257                         i=setsockopt(b->num,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 258                         if (i < 0)
 259                                 {
 260                                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 261                                 ERR_add_error_data(4,"host=",c->param_hostname,
 262                                         ":",c->param_port);
 263                                 BIOerr(BIO_F_CONN_STATE,BIO_R_KEEPALIVE);
 264                                 goto exit_loop;
 265                                 }
 266 #endif
 267                         break;
 268
 269                 case BIO_CONN_S_CONNECT:
 270                         BIO_clear_retry_flags(b);
 271                         ret=connect(b->num,
 272                                 (struct sockaddr *)&c->them,
 273                                 sizeof(c->them));
 274                         b->retry_reason=0;
 275                         if (ret < 0)
 276                                 {
 277                                 if (BIO_sock_should_retry(ret))
 278                                         {
 279                                         BIO_set_retry_special(b);
 280                                         c->state=BIO_CONN_S_BLOCKED_CONNECT;
 281                                         b->retry_reason=BIO_RR_CONNECT;
 282                                         }
 283                                 else
 284                                         {
 285                                         SYSerr(SYS_F_CONNECT,get_last_socket_error());
 286                                         ERR_add_error_data(4,"host=",
 287                                                 c->param_hostname,
 288                                                 ":",c->param_port);
 289                                         BIOerr(BIO_F_CONN_STATE,BIO_R_CONNECT_ERROR);
 290                                         }
 291                                 goto exit_loop;
 292                                 }
 293                         else
 294                                 c->state=BIO_CONN_S_OK;
 295                         break;
 296
 297                 case BIO_CONN_S_BLOCKED_CONNECT:
 298                         i=BIO_sock_error(b->num);
 299                         if (i)
 300                                 {
 301                                 BIO_clear_retry_flags(b);
 302                                 SYSerr(SYS_F_CONNECT,i);
 303                                 ERR_add_error_data(4,"host=",
 304                                         c->param_hostname,
 305                                         ":",c->param_port);
 306                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NBIO_CONNECT_ERROR);
 307                                 ret=0;
 308                                 goto exit_loop;
 309                                 }
 310                         else
 311                                 c->state=BIO_CONN_S_OK;
 312                         break;
 313
 314                 case BIO_CONN_S_OK:
 315                         ret=1;
 316                         goto exit_loop;
 317                 default:
 318                         abort();
 319                         goto exit_loop;
 320                         }
 321
 322                 if (cb != NULL)
 323                         {
 324                         if (!(ret=cb((BIO *)b,c->state,ret)))
 325                                 goto end;
 326                         }
 327                 }
 328
 329         /* Loop does not exit */
 330 exit_loop:
 331         if (cb != NULL)
 332                 ret=cb((BIO *)b,c->state,ret);
 333 end:
 334         return(ret);
 335         }
 336
 337 BIO_CONNECT *BIO_CONNECT_new()
 338         {
 339         BIO_CONNECT *ret;
 340
 341         if ((ret=(BIO_CONNECT *)Malloc(sizeof(BIO_CONNECT))) == NULL)
 342                 return(NULL);
 343         ret->state=BIO_CONN_S_BEFORE;
 344         ret->param_hostname=NULL;
 345         ret->param_port=NULL;
 346         ret->info_callback=NULL;
 347         ret->nbio=0;
 348         ret->ip[0]=0;
 349         ret->ip[1]=0;
 350         ret->ip[2]=0;
 351         ret->ip[3]=0;
 352         ret->port=0;
 353         memset((char *)&ret->them,0,sizeof(ret->them));
 354         return(ret);
 355         }
 356
 357 void BIO_CONNECT_free(a)
 358 BIO_CONNECT *a;
 359         {
 360         if (a->param_hostname != NULL)
 361                 Free(a->param_hostname);
 362         if (a->param_port != NULL)
 363                 Free(a->param_port);
 364         Free(a);
 365         }
 366
 367 BIO_METHOD *BIO_s_connect()
 368         {
 369         return(&methods_connectp);
 370         }
 371
 372 static int conn_new(bi)
 373 BIO *bi;
 374         {
 375         bi->init=0;
 376         bi->num=INVALID_SOCKET;
 377         bi->flags=0;
 378         if ((bi->ptr=(char *)BIO_CONNECT_new()) == NULL)
 379                 return(0);
 380         else
 381                 return(1);
 382         }
 383
 384 static void conn_close_socket(bio)
 385 BIO *bio;
 386         {
 387         BIO_CONNECT *c;
 388
 389         c=(BIO_CONNECT *)bio->ptr;
 390         if (bio->num != INVALID_SOCKET)
 391                 {
 392                 /* Only do a shutdown if things were established */
 393                 if (c->state == BIO_CONN_S_OK)
 394                         shutdown(bio->num,2);
 395                 closesocket(bio->num);
 396                 bio->num=INVALID_SOCKET;
 397                 }
 398         }
 399
 400 static int conn_free(a)
 401 BIO *a;
 402         {
 403         BIO_CONNECT *data;
 404
 405         if (a == NULL) return(0);
 406         data=(BIO_CONNECT *)a->ptr;
 407
 408         if (a->shutdown)
 409                 {
 410                 conn_close_socket(a);
 411                 BIO_CONNECT_free(data);
 412                 a->ptr=NULL;
 413                 a->flags=0;
 414                 a->init=0;
 415                 }
 416         return(1);
 417         }
 418
 419 static int conn_read(b,out,outl)
 420 BIO *b;
 421 char *out;
 422 int outl;
 423         {
 424         int ret=0;
 425         BIO_CONNECT *data;
 426
 427         data=(BIO_CONNECT *)b->ptr;
 428         if (data->state != BIO_CONN_S_OK)
 429                 {
 430                 ret=conn_state(b,data);
 431                 if (ret <= 0)
 432                                 return(ret);
 433                 }
 434
 435         if (out != NULL)
 436                 {
 437                 clear_socket_error();
 438                 ret=readsocket(b->num,out,outl);
 439                 BIO_clear_retry_flags(b);
 440                 if (ret <= 0)
 441                         {
 442                         if (BIO_sock_should_retry(ret))
 443                                 BIO_set_retry_read(b);
 444                         }
 445                 }
 446         return(ret);
 447         }
 448
 449 static int conn_write(b,in,inl)
 450 BIO *b;
 451 char *in;
 452 int inl;
 453         {
 454         int ret;
 455         BIO_CONNECT *data;
 456
 457         data=(BIO_CONNECT *)b->ptr;
 458         if (data->state != BIO_CONN_S_OK)
 459                 {
 460                 ret=conn_state(b,data);
 461                 if (ret <= 0) return(ret);
 462                 }
 463
 464         clear_socket_error();
 465         ret=writesocket(b->num,in,inl);
 466         BIO_clear_retry_flags(b);
 467         if (ret <= 0)
 468                 {
 469                 if (BIO_sock_should_retry(ret))
 470                         BIO_set_retry_write(b);
 471                 }
 472         return(ret);
 473         }
 474
 475 static long conn_ctrl(b,cmd,num,ptr)
 476 BIO *b;
 477 int cmd;
 478 long num;
 479 char *ptr;
 480         {
 481         BIO *dbio;
 482         int *ip;
 483         char **pptr;
 484         long ret=1;
 485         BIO_CONNECT *data;
 486
 487         data=(BIO_CONNECT *)b->ptr;
 488
 489         switch (cmd)
 490                 {
 491         case BIO_CTRL_RESET:
 492                 ret=0;
 493                 data->state=BIO_CONN_S_BEFORE;
 494                 conn_close_socket(b);
 495                 b->flags=0;
 496                 break;
 497         case BIO_C_DO_STATE_MACHINE:
 498                 /* use this one to start the connection */
 499                 if (!data->state != BIO_CONN_S_OK)
 500                         ret=(long)conn_state(b,data);
 501                 else
 502                         ret=1;
 503                 break;
 504         case BIO_C_GET_CONNECT:
 505                 if (ptr != NULL)
 506                         {
 507                         pptr=(char **)ptr;
 508                         if (num == 0)
 509                                 {
 510                                 *pptr=data->param_hostname;
 511
 512                                 }
 513                         else if (num == 1)
 514                                 {
 515                                 *pptr=data->param_port;
 516                                 }
 517                         else if (num == 2)
 518                                 {
 519                                 *pptr= (char *)&(data->ip[0]);
 520                                 }
 521                         else if (num == 3)
 522                                 {
 523                                 *((int *)ptr)=data->port;
 524                                 }
 525                         if ((!b->init) || (ptr == NULL))
 526                                 *pptr="not initalised";
 527                         ret=1;
 528                         }
 529                 break;
 530         case BIO_C_SET_CONNECT:
 531                 if (ptr != NULL)
 532                         {
 533                         b->init=1;
 534                         if (num == 0)
 535                                 {
 536                                 if (data->param_hostname != NULL)
 537                                         Free(data->param_hostname);
 538                                 data->param_hostname=BUF_strdup(ptr);
 539                                 }
 540                         else if (num == 1)
 541                                 {
 542                                 if (data->param_port != NULL)
 543                                         Free(data->param_port);
 544                                 data->param_port=BUF_strdup(ptr);
 545                                 }
 546                         else if (num == 2)
 547                                 {
 548                                 char buf[16];
 549
 550                                 sprintf(buf,"%d.%d.%d.%d",
 551                                         ptr[0],ptr[1],ptr[2],ptr[3]);
 552                                 if (data->param_hostname != NULL)
 553                                         Free(data->param_hostname);
 554                                 data->param_hostname=BUF_strdup(buf);
 555                                 memcpy(&(data->ip[0]),ptr,4);
 556                                 }
 557                         else if (num == 3)
 558                                 {
 559                                 char buf[16];
 560
 561                                 sprintf(buf,"%d",*(int *)ptr);
 562                                 if (data->param_port != NULL)
 563                                         Free(data->param_port);
 564                                 data->param_port=BUF_strdup(buf);
 565                                 data->port= *(int *)ptr;
 566                                 }
 567                         }
 568                 break;
 569         case BIO_C_SET_NBIO:
 570                 data->nbio=(int)num;
 571                 break;
 572         case BIO_C_GET_FD:
 573                 if (b->init)
 574                         {
 575                         ip=(int *)ptr;
 576                         if (ip != NULL)
 577                                 *ip=b->num;
 578                         ret=b->num;
 579                         }
 580                 else
 581                         ret= -1;
 582                 break;
 583         case BIO_CTRL_GET_CLOSE:
 584                 ret=b->shutdown;
 585                 break;
 586         case BIO_CTRL_SET_CLOSE:
 587                 b->shutdown=(int)num;
 588                 break;
 589         case BIO_CTRL_PENDING:
 590         case BIO_CTRL_WPENDING:
 591                 ret=0;
 592                 break;
 593         case BIO_CTRL_FLUSH:
 594                 break;
 595         case BIO_CTRL_DUP:
 596                 dbio=(BIO *)ptr;
 597                 if (data->param_port)
 598                         BIO_set_conn_port(dbio,data->param_port);
 599                 if (data->param_hostname)
 600                         BIO_set_conn_hostname(dbio,data->param_hostname);
 601                 BIO_set_nbio(dbio,data->nbio);
 602                 BIO_set_info_callback(dbio,data->info_callback);
 603                 break;
 604         case BIO_CTRL_SET_CALLBACK:
 605                 data->info_callback=(int (*)())ptr;
 606                 break;
 607         case BIO_CTRL_GET_CALLBACK:
 608                 {
 609                 int (**fptr)();
 610
 611                 fptr=(int (**)())ptr;
 612                 *fptr=data->info_callback;
 613                 }
 614                 break;
 615         default:
 616                 ret=0;
 617                 break;
 618                 }
 619         return(ret);
 620         }
 621
 622 static int conn_puts(bp,str)
 623 BIO *bp;
 624 char *str;
 625         {
 626         int n,ret;
 627
 628         n=strlen(str);
 629         ret=conn_write(bp,str,n);
 630         return(ret);
 631         }
 632
 633 BIO *BIO_new_connect(str)
 634 char *str;
 635         {
 636         BIO *ret;
 637
 638         ret=BIO_new(BIO_s_connect());
 639         if (ret == NULL) return(NULL);
 640         if (BIO_set_conn_hostname(ret,str))
 641                 return(ret);
 642         else
 643                 {
 644                 BIO_free(ret);
 645                 return(NULL);
 646                 }
 647         }
 648
 649 #endif
 650