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 (__VMS_VER < 70000000) /* FIONBIO used as a switch to enable ioctl,
  74                               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          * compatable 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 compatablity with the ssl info_callback */
  98         int (*info_callback)();
  99         } BIO_CONNECT;
 100
 101 static int conn_write(BIO *h,char *buf,int num);
 102 static int conn_read(BIO *h,char *buf,int size);
 103 static int conn_puts(BIO *h,char *str);
 104 static long conn_ctrl(BIO *h,int cmd,long arg1,char *arg2);
 105 static int conn_new(BIO *h);
 106 static int conn_free(BIO *data);
 107
 108 static int conn_state(BIO *b, BIO_CONNECT *c);
 109 static void conn_close_socket(BIO *data);
 110 BIO_CONNECT *BIO_CONNECT_new(void );
 111 void BIO_CONNECT_free(BIO_CONNECT *a);
 112
 113 static BIO_METHOD methods_connectp=
 114         {
 115         BIO_TYPE_CONNECT,
 116         "socket connect",
 117         conn_write,
 118         conn_read,
 119         conn_puts,
 120         NULL, /* connect_gets, */
 121         conn_ctrl,
 122         conn_new,
 123         conn_free,
 124         };
 125
 126 static int conn_state(BIO *b, BIO_CONNECT *c)
 127         {
 128         int ret= -1,i;
 129         unsigned long l;
 130         char *p,*q;
 131         int (*cb)()=NULL;
 132
 133         if (c->info_callback != NULL)
 134                 cb=c->info_callback;
 135
 136         for (;;)
 137                 {
 138                 switch (c->state)
 139                         {
 140                 case BIO_CONN_S_BEFORE:
 141                         p=c->param_hostname;
 142                         if (p == NULL)
 143                                 {
 144                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NO_HOSTNAME_SPECIFIED);
 145                                 goto exit_loop;
 146                                 }
 147                         for ( ; *p != '\0'; p++)
 148                                 {
 149                                 if ((*p == ':') || (*p == '/')) break;
 150                                 }
 151
 152                         i= *p;
 153                         if ((i == ':') || (i == '/'))
 154                                 {
 155
 156                                 *(p++)='\0';
 157                                 if (i == ':')
 158                                         {
 159                                         for (q=p; *q; q++)
 160                                                 if (*q == '/')
 161                                                         {
 162                                                         *q='\0';
 163                                                         break;
 164                                                         }
 165                                         if (c->param_port != NULL)
 166                                                 Free(c->param_port);
 167                                         c->param_port=BUF_strdup(p);
 168                                         }
 169                                 }
 170
 171                         if (c->param_port == NULL)
 172                                 {
 173                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NO_PORT_SPECIFIED);
 174                                 ERR_add_error_data(2,"host=",c->param_hostname);
 175                                 goto exit_loop;
 176                                 }
 177                         c->state=BIO_CONN_S_GET_IP;
 178                         break;
 179
 180                 case BIO_CONN_S_GET_IP:
 181                         if (BIO_get_host_ip(c->param_hostname,&(c->ip[0])) <= 0)
 182                                 goto exit_loop;
 183                         c->state=BIO_CONN_S_GET_PORT;
 184                         break;
 185
 186                 case BIO_CONN_S_GET_PORT:
 187                         if (c->param_port == NULL)
 188                                 {
 189                                 abort();
 190                                 goto exit_loop;
 191                                 }
 192                         else if (BIO_get_port(c->param_port,&c->port) <= 0)
 193                                 goto exit_loop;
 194                         c->state=BIO_CONN_S_CREATE_SOCKET;
 195                         break;
 196
 197                 case BIO_CONN_S_CREATE_SOCKET:
 198                         /* now setup address */
 199                         memset((char *)&c->them,0,sizeof(c->them));
 200                         c->them.sin_family=AF_INET;
 201                         c->them.sin_port=htons((unsigned short)c->port);
 202                         l=(unsigned long)
 203                                 ((unsigned long)c->ip[0]<<24L)|
 204                                 ((unsigned long)c->ip[1]<<16L)|
 205                                 ((unsigned long)c->ip[2]<< 8L)|
 206                                 ((unsigned long)c->ip[3]);
 207                         c->them.sin_addr.s_addr=htonl(l);
 208                         c->state=BIO_CONN_S_CREATE_SOCKET;
 209
 210                         ret=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 211                         if (ret == INVALID_SOCKET)
 212                                 {
 213                                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 214                                 ERR_add_error_data(4,"host=",c->param_hostname,
 215                                         ":",c->param_port);
 216                                 BIOerr(BIO_F_CONN_STATE,BIO_R_UNABLE_TO_CREATE_SOCKET);
 217                                 goto exit_loop;
 218                                 }
 219                         b->num=ret;
 220                         c->state=BIO_CONN_S_NBIO;
 221                         break;
 222
 223                 case BIO_CONN_S_NBIO:
 224                         if (c->nbio)
 225                                 {
 226                                 if (!BIO_socket_nbio(b->num,1))
 227                                         {
 228                                         BIOerr(BIO_F_CONN_STATE,BIO_R_ERROR_SETTING_NBIO);
 229                                         ERR_add_error_data(4,"host=",
 230                                                 c->param_hostname,
 231                                                 ":",c->param_port);
 232                                         goto exit_loop;
 233                                         }
 234                                 }
 235                         c->state=BIO_CONN_S_CONNECT;
 236
 237 #ifdef SO_KEEPALIVE
 238                         i=1;
 239                         i=setsockopt(b->num,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
 240                         if (i < 0)
 241                                 {
 242                                 SYSerr(SYS_F_SOCKET,get_last_socket_error());
 243                                 ERR_add_error_data(4,"host=",c->param_hostname,
 244                                         ":",c->param_port);
 245                                 BIOerr(BIO_F_CONN_STATE,BIO_R_KEEPALIVE);
 246                                 goto exit_loop;
 247                                 }
 248 #endif
 249                         break;
 250
 251                 case BIO_CONN_S_CONNECT:
 252                         BIO_clear_retry_flags(b);
 253                         ret=connect(b->num,
 254                                 (struct sockaddr *)&c->them,
 255                                 sizeof(c->them));
 256                         b->retry_reason=0;
 257                         if (ret < 0)
 258                                 {
 259                                 if (BIO_sock_should_retry(ret))
 260                                         {
 261                                         BIO_set_retry_special(b);
 262                                         c->state=BIO_CONN_S_BLOCKED_CONNECT;
 263                                         b->retry_reason=BIO_RR_CONNECT;
 264                                         }
 265                                 else
 266                                         {
 267                                         SYSerr(SYS_F_CONNECT,get_last_socket_error());
 268                                         ERR_add_error_data(4,"host=",
 269                                                 c->param_hostname,
 270                                                 ":",c->param_port);
 271                                         BIOerr(BIO_F_CONN_STATE,BIO_R_CONNECT_ERROR);
 272                                         }
 273                                 goto exit_loop;
 274                                 }
 275                         else
 276                                 c->state=BIO_CONN_S_OK;
 277                         break;
 278
 279                 case BIO_CONN_S_BLOCKED_CONNECT:
 280                         i=BIO_sock_error(b->num);
 281                         if (i)
 282                                 {
 283                                 BIO_clear_retry_flags(b);
 284                                 SYSerr(SYS_F_CONNECT,i);
 285                                 ERR_add_error_data(4,"host=",
 286                                         c->param_hostname,
 287                                         ":",c->param_port);
 288                                 BIOerr(BIO_F_CONN_STATE,BIO_R_NBIO_CONNECT_ERROR);
 289                                 ret=0;
 290                                 goto exit_loop;
 291                                 }
 292                         else
 293                                 c->state=BIO_CONN_S_OK;
 294                         break;
 295
 296                 case BIO_CONN_S_OK:
 297                         ret=1;
 298                         goto exit_loop;
 299                 default:
 300                         abort();
 301                         goto exit_loop;
 302                         }
 303
 304                 if (cb != NULL)
 305                         {
 306                         if (!(ret=cb((BIO *)b,c->state,ret)))
 307                                 goto end;
 308                         }
 309                 }
 310
 311         /* Loop does not exit */
 312 exit_loop:
 313         if (cb != NULL)
 314                 ret=cb((BIO *)b,c->state,ret);
 315 end:
 316         return(ret);
 317         }
 318
 319 BIO_CONNECT *BIO_CONNECT_new(void)
 320         {
 321         BIO_CONNECT *ret;
 322
 323         if ((ret=(BIO_CONNECT *)Malloc(sizeof(BIO_CONNECT))) == NULL)
 324                 return(NULL);
 325         ret->state=BIO_CONN_S_BEFORE;
 326         ret->param_hostname=NULL;
 327         ret->param_port=NULL;
 328         ret->info_callback=NULL;
 329         ret->nbio=0;
 330         ret->ip[0]=0;
 331         ret->ip[1]=0;
 332         ret->ip[2]=0;
 333         ret->ip[3]=0;
 334         ret->port=0;
 335         memset((char *)&ret->them,0,sizeof(ret->them));
 336         return(ret);
 337         }
 338
 339 void BIO_CONNECT_free(BIO_CONNECT *a)
 340         {
 341         if(a == NULL)
 342             return;
 343
 344         if (a->param_hostname != NULL)
 345                 Free(a->param_hostname);
 346         if (a->param_port != NULL)
 347                 Free(a->param_port);
 348         Free(a);
 349         }
 350
 351 BIO_METHOD *BIO_s_connect(void)
 352         {
 353         return(&methods_connectp);
 354         }
 355
 356 static int conn_new(BIO *bi)
 357         {
 358         bi->init=0;
 359         bi->num=INVALID_SOCKET;
 360         bi->flags=0;
 361         if ((bi->ptr=(char *)BIO_CONNECT_new()) == NULL)
 362                 return(0);
 363         else
 364                 return(1);
 365         }
 366
 367 static void conn_close_socket(BIO *bio)
 368         {
 369         BIO_CONNECT *c;
 370
 371         c=(BIO_CONNECT *)bio->ptr;
 372         if (bio->num != INVALID_SOCKET)
 373                 {
 374                 /* Only do a shutdown if things were established */
 375                 if (c->state == BIO_CONN_S_OK)
 376                         shutdown(bio->num,2);
 377                 closesocket(bio->num);
 378                 bio->num=INVALID_SOCKET;
 379                 }
 380         }
 381
 382 static int conn_free(BIO *a)
 383         {
 384         BIO_CONNECT *data;
 385
 386         if (a == NULL) return(0);
 387         data=(BIO_CONNECT *)a->ptr;
 388
 389         if (a->shutdown)
 390                 {
 391                 conn_close_socket(a);
 392                 BIO_CONNECT_free(data);
 393                 a->ptr=NULL;
 394                 a->flags=0;
 395                 a->init=0;
 396                 }
 397         return(1);
 398         }
 399
 400 static int conn_read(BIO *b, char *out, int outl)
 401         {
 402         int ret=0;
 403         BIO_CONNECT *data;
 404
 405         data=(BIO_CONNECT *)b->ptr;
 406         if (data->state != BIO_CONN_S_OK)
 407                 {
 408                 ret=conn_state(b,data);
 409                 if (ret <= 0)
 410                                 return(ret);
 411                 }
 412
 413         if (out != NULL)
 414                 {
 415                 clear_socket_error();
 416                 ret=readsocket(b->num,out,outl);
 417                 BIO_clear_retry_flags(b);
 418                 if (ret <= 0)
 419                         {
 420                         if (BIO_sock_should_retry(ret))
 421                                 BIO_set_retry_read(b);
 422                         }
 423                 }
 424         return(ret);
 425         }
 426
 427 static int conn_write(BIO *b, char *in, int inl)
 428         {
 429         int ret;
 430         BIO_CONNECT *data;
 431
 432         data=(BIO_CONNECT *)b->ptr;
 433         if (data->state != BIO_CONN_S_OK)
 434                 {
 435                 ret=conn_state(b,data);
 436                 if (ret <= 0) return(ret);
 437                 }
 438
 439         clear_socket_error();
 440         ret=writesocket(b->num,in,inl);
 441         BIO_clear_retry_flags(b);
 442         if (ret <= 0)
 443                 {
 444                 if (BIO_sock_should_retry(ret))
 445                         BIO_set_retry_write(b);
 446                 }
 447         return(ret);
 448         }
 449
 450 static long conn_ctrl(BIO *b, int cmd, long num, char *ptr)
 451         {
 452         BIO *dbio;
 453         int *ip;
 454         const char **pptr;
 455         long ret=1;
 456         BIO_CONNECT *data;
 457
 458         data=(BIO_CONNECT *)b->ptr;
 459
 460         switch (cmd)
 461                 {
 462         case BIO_CTRL_RESET:
 463                 ret=0;
 464                 data->state=BIO_CONN_S_BEFORE;
 465                 conn_close_socket(b);
 466                 b->flags=0;
 467                 break;
 468         case BIO_C_DO_STATE_MACHINE:
 469                 /* use this one to start the connection */
 470                 if (!data->state != BIO_CONN_S_OK)
 471                         ret=(long)conn_state(b,data);
 472                 else
 473                         ret=1;
 474                 break;
 475         case BIO_C_GET_CONNECT:
 476                 if (ptr != NULL)
 477                         {
 478                         pptr=(const char **)ptr;
 479                         if (num == 0)
 480                                 {
 481                                 *pptr=data->param_hostname;
 482
 483                                 }
 484                         else if (num == 1)
 485                                 {
 486                                 *pptr=data->param_port;
 487                                 }
 488                         else if (num == 2)
 489                                 {
 490                                 *pptr= (char *)&(data->ip[0]);
 491                                 }
 492                         else if (num == 3)
 493                                 {
 494                                 *((int *)ptr)=data->port;
 495                                 }
 496                         if ((!b->init) || (ptr == NULL))
 497                                 *pptr="not initalised";
 498                         ret=1;
 499                         }
 500                 break;
 501         case BIO_C_SET_CONNECT:
 502                 if (ptr != NULL)
 503                         {
 504                         b->init=1;
 505                         if (num == 0)
 506                                 {
 507                                 if (data->param_hostname != NULL)
 508                                         Free(data->param_hostname);
 509                                 data->param_hostname=BUF_strdup(ptr);
 510                                 }
 511                         else if (num == 1)
 512                                 {
 513                                 if (data->param_port != NULL)
 514                                         Free(data->param_port);
 515                                 data->param_port=BUF_strdup(ptr);
 516                                 }
 517                         else if (num == 2)
 518                                 {
 519                                 char buf[16];
 520
 521                                 sprintf(buf,"%d.%d.%d.%d",
 522                                         ptr[0],ptr[1],ptr[2],ptr[3]);
 523                                 if (data->param_hostname != NULL)
 524                                         Free(data->param_hostname);
 525                                 data->param_hostname=BUF_strdup(buf);
 526                                 memcpy(&(data->ip[0]),ptr,4);
 527                                 }
 528                         else if (num == 3)
 529                                 {
 530                                 char buf[16];
 531
 532                                 sprintf(buf,"%d",*(int *)ptr);
 533                                 if (data->param_port != NULL)
 534                                         Free(data->param_port);
 535                                 data->param_port=BUF_strdup(buf);
 536                                 data->port= *(int *)ptr;
 537                                 }
 538                         }
 539                 break;
 540         case BIO_C_SET_NBIO:
 541                 data->nbio=(int)num;
 542                 break;
 543         case BIO_C_GET_FD:
 544                 if (b->init)
 545                         {
 546                         ip=(int *)ptr;
 547                         if (ip != NULL)
 548                                 *ip=b->num;
 549                         ret=b->num;
 550                         }
 551                 else
 552                         ret= -1;
 553                 break;
 554         case BIO_CTRL_GET_CLOSE:
 555                 ret=b->shutdown;
 556                 break;
 557         case BIO_CTRL_SET_CLOSE:
 558                 b->shutdown=(int)num;
 559                 break;
 560         case BIO_CTRL_PENDING:
 561         case BIO_CTRL_WPENDING:
 562                 ret=0;
 563                 break;
 564         case BIO_CTRL_FLUSH:
 565                 break;
 566         case BIO_CTRL_DUP:
 567                 dbio=(BIO *)ptr;
 568                 if (data->param_port)
 569                         BIO_set_conn_port(dbio,data->param_port);
 570                 if (data->param_hostname)
 571                         BIO_set_conn_hostname(dbio,data->param_hostname);
 572                 BIO_set_nbio(dbio,data->nbio);
 573                 BIO_set_info_callback(dbio,data->info_callback);
 574                 break;
 575         case BIO_CTRL_SET_CALLBACK:
 576                 data->info_callback=(int (*)())ptr;
 577                 break;
 578         case BIO_CTRL_GET_CALLBACK:
 579                 {
 580                 int (**fptr)();
 581
 582                 fptr=(int (**)())ptr;
 583                 *fptr=data->info_callback;
 584                 }
 585                 break;
 586         default:
 587                 ret=0;
 588                 break;
 589                 }
 590         return(ret);
 591         }
 592
 593 static int conn_puts(BIO *bp, char *str)
 594         {
 595         int n,ret;
 596
 597         n=strlen(str);
 598         ret=conn_write(bp,str,n);
 599         return(ret);
 600         }
 601
 602 BIO *BIO_new_connect(char *str)
 603         {
 604         BIO *ret;
 605
 606         ret=BIO_new(BIO_s_connect());
 607         if (ret == NULL) return(NULL);
 608         if (BIO_set_conn_hostname(ret,str))
 609                 return(ret);
 610         else
 611                 {
 612                 BIO_free(ret);
 613                 return(NULL);
 614                 }
 615         }
 616
 617 #endif
 618