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