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