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