crypto/bio/bss_conn.c

   1 /* crypto/bio/bss_conn.c */
   2 /* Copyright (C) 1995-1997 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         } BIO_CONNECT;
  92
  93 #ifndef NOPROTO
  94 static int conn_write(BIO *h,char *buf,int num);
  95 static int conn_read(BIO *h,char *buf,int size);
  96 static int conn_puts(BIO *h,char *str);
  97 static long conn_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  98 static int conn_new(BIO *h);
  99 static int conn_free(BIO *data);
 100 #else
 101 static int conn_write();
 102 static int conn_read();
 103 static int conn_puts();
 104 static long conn_ctrl();
 105 static int conn_new();
 106 static int conn_free();
 107 #endif
 108
 109 #ifndef NOPROTO
 110
 111 static int conn_state(BIO *b, BIO_CONNECT *c);
 112 static void conn_close_socket(BIO *data);
 113 BIO_CONNECT *BIO_CONNECT_new(void );
 114 void BIO_CONNECT_free(BIO_CONNECT *a);
 115
 116 #else
 117
 118 static int conn_state();
 119 static void conn_close_socket();
 120 BIO_CONNECT *BIO_CONNECT_new();
 121 void BIO_CONNECT_free();
 122
 123 #endif
 124
 125 #define CONN_S_BEFORE           1
 126 #define CONN_S_GET_IP           2
 127 #define CONN_S_GET_PORT         3
 128 #define CONN_S_CREATE_SOCKET    4
 129 #define CONN_S_CONNECT          5
 130 #define CONN_S_OK               6
 131 #define CONN_S_BLOCKED_CONNECT  7
 132 #define CONN_S_NBIO             8
 133
 134 static BIO_METHOD methods_connectp=
 135         {
 136         BIO_TYPE_CONNECT,"socket connect",
 137         conn_write,
 138         conn_read,
 139         conn_puts,
 140         NULL, /* connect_gets, */
 141         conn_ctrl,
 142         conn_new,
 143         conn_free,
 144         };
 145
 146 static int conn_state(b,c)
 147 BIO *b;
 148 BIO_CONNECT *c;
 149         {
 150         int ret= -1,i;
 151         unsigned long l;
 152         char *p,*q;
 153
 154         switch (c->state)
 155                 {
 156         case CONN_S_BEFORE:
 157                 p=c->param_hostname;
 158                 if (p == NULL)
 159                         {
 160                         BIOerr(BIO_F_CONN_STATE,BIO_R_NO_HOSTHNAME_SPECIFIED);
 161                         break;
 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 (p == NULL)
 188                         {
 189                         BIOerr(BIO_F_CONN_STATE,BIO_R_NO_PORT_SPECIFIED);
 190                         break;
 191                         }
 192                 c->state=CONN_S_GET_IP;
 193
 194         case CONN_S_GET_IP:
 195                 if (BIO_get_host_ip(c->param_hostname,&(c->ip[0])) <= 0)
 196                         break;
 197                 c->state=CONN_S_GET_PORT;
 198
 199         case CONN_S_GET_PORT:
 200                 if (BIO_get_port(c->param_port,&c->port) <= 0)
 201                         break;
 202                 c->state=CONN_S_CREATE_SOCKET;
 203
 204         case CONN_S_CREATE_SOCKET:
 205                 /* now setup address */
 206                 memset((char *)&c->them,0,sizeof(c->them));
 207                 c->them.sin_family=AF_INET;
 208                 c->them.sin_port=htons((unsigned short)c->port);
 209                 l=(unsigned long)
 210                         ((unsigned long)c->ip[0]<<24L)|
 211                         ((unsigned long)c->ip[1]<<16L)|
 212                         ((unsigned long)c->ip[2]<< 8L)|
 213                         ((unsigned long)c->ip[3]);
 214                 c->them.sin_addr.s_addr=htonl(l);
 215                 c->state=CONN_S_CREATE_SOCKET;
 216
 217                 ret=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
 218                 if (ret == INVALID_SOCKET)
 219                         {
 220                         SYSerr(SYS_F_SOCKET,errno);
 221                         BIOerr(BIO_F_CONN_STATE,BIO_R_UNABLE_TO_CREATE_SOCKET);
 222                         break;
 223                         }
 224                 b->num=ret;
 225                 c->state=CONN_S_NBIO;
 226
 227         case CONN_S_NBIO:
 228 #ifdef FIONBIO
 229                 if (c->nbio)
 230                         {
 231                         l=1;
 232                         ret=BIO_socket_ioctl(b->num,FIONBIO,&l);
 233                         if (ret < 0)
 234                                 {
 235                                 BIOerr(BIO_F_CONN_STATE,BIO_R_ERROR_SETTING_NBIO);
 236                                 break;
 237                                 }
 238                         }
 239 #endif
 240                 c->state=CONN_S_CONNECT;
 241
 242         case CONN_S_CONNECT:
 243                 BIO_clear_retry_flags(b);
 244                 ret=connect(b->num,
 245                         (struct sockaddr *)&c->them,
 246                         sizeof(c->them));
 247                 b->retry_reason=0;
 248                 if (ret < 0)
 249                         {
 250                         if (BIO_sock_should_retry(ret))
 251                                 {
 252                                 BIO_set_retry_special(b);
 253                                 c->state=CONN_S_BLOCKED_CONNECT;
 254                                 b->retry_reason=BIO_RR_CONNECT;
 255                                 }
 256                         else
 257                                 {
 258                                 SYSerr(SYS_F_CONNECT,errno);
 259                                 BIOerr(BIO_F_CONN_STATE,BIO_R_CONNECT_ERROR);
 260                                 }
 261                         }
 262                 else
 263                         {
 264                         ret=1;
 265                         c->state=CONN_S_OK;
 266                         }
 267                 break;
 268
 269         case CONN_S_BLOCKED_CONNECT:
 270                 BIO_clear_retry_flags(b);
 271                 i=BIO_sock_error(b->num);
 272                 if (i)
 273                         {
 274                         SYSerr(SYS_F_CONNECT,i);
 275                         BIOerr(BIO_F_CONN_STATE,BIO_R_NBIO_CONNECT_ERROR);
 276                         }
 277                 else
 278                         {
 279                         c->state=CONN_S_OK;
 280                         ret=1;
 281                         }
 282                 break;
 283
 284         case CONN_S_OK:
 285                 ret=1;
 286                 break;
 287         default:
 288                 abort();
 289                 }
 290         return(ret);
 291         }
 292
 293 BIO_CONNECT *BIO_CONNECT_new()
 294         {
 295         BIO_CONNECT *ret;
 296
 297         if ((ret=(BIO_CONNECT *)Malloc(sizeof(BIO_CONNECT))) == NULL)
 298                 return(NULL);
 299         ret->state=CONN_S_BEFORE;
 300         ret->param_hostname=NULL;
 301         ret->param_port=NULL;
 302         ret->nbio=0;
 303         ret->ip[0]=0;
 304         ret->ip[1]=0;
 305         ret->ip[2]=0;
 306         ret->ip[3]=0;
 307         ret->port=0;
 308         memset((char *)&ret->them,0,sizeof(ret->them));
 309         ret->error=0;
 310         return(ret);
 311         }
 312
 313 void BIO_CONNECT_free(a)
 314 BIO_CONNECT *a;
 315         {
 316         if (a->param_hostname != NULL)
 317                 Free(a->param_hostname);
 318         if (a->param_port != NULL)
 319                 Free(a->param_port);
 320         Free(a);
 321         }
 322
 323 BIO_METHOD *BIO_s_connect()
 324         {
 325         return(&methods_connectp);
 326         }
 327
 328 static int conn_new(bi)
 329 BIO *bi;
 330         {
 331         bi->init=0;
 332         bi->num=INVALID_SOCKET;
 333         bi->flags=0;
 334         if ((bi->ptr=(char *)BIO_CONNECT_new()) == NULL)
 335                 return(0);
 336         else
 337                 return(1);
 338         }
 339
 340 static void conn_close_socket(bio)
 341 BIO *bio;
 342         {
 343         BIO_CONNECT *c;
 344
 345         c=(BIO_CONNECT *)bio->ptr;
 346         if (bio->num != INVALID_SOCKET)
 347                 {
 348                 /* Only do a shutdown if things were established */
 349                 if (c->state == CONN_S_OK)
 350                         shutdown(bio->num,2);
 351 # ifdef WINDOWS
 352                 closesocket(bio->num);
 353 # else
 354                 close(bio->num);
 355 # endif
 356                 bio->num=INVALID_SOCKET;
 357                 }
 358         }
 359
 360 static int conn_free(a)
 361 BIO *a;
 362         {
 363         BIO_CONNECT *data;
 364
 365         if (a == NULL) return(0);
 366         data=(BIO_CONNECT *)a->ptr;
 367
 368         if (a->shutdown)
 369                 {
 370                 conn_close_socket(a);
 371                 BIO_CONNECT_free(data);
 372                 a->ptr=NULL;
 373                 a->flags=0;
 374                 a->init=0;
 375                 }
 376         return(1);
 377         }
 378
 379 static int conn_read(b,out,outl)
 380 BIO *b;
 381 char *out;
 382 int outl;
 383         {
 384         int ret=0;
 385         BIO_CONNECT *data;
 386
 387         data=(BIO_CONNECT *)b->ptr;
 388         if (data->state != CONN_S_OK)
 389                 {
 390                 ret=conn_state(b,data);
 391                 if (ret <= 0) return(ret);
 392                 }
 393
 394         if (out != NULL)
 395                 {
 396                 errno=0;
 397 #if defined(WINDOWS)
 398                 ret=recv(b->num,out,outl,0);
 399 #else
 400                 ret=read(b->num,out,outl);
 401 #endif
 402                 BIO_clear_retry_flags(b);
 403                 if (ret <= 0)
 404                         {
 405                         if (BIO_sock_should_retry(ret))
 406                                 BIO_set_retry_read(b);
 407                         }
 408                 }
 409         return(ret);
 410         }
 411
 412 static int conn_write(b,in,inl)
 413 BIO *b;
 414 char *in;
 415 int inl;
 416         {
 417         int ret;
 418         BIO_CONNECT *data;
 419
 420         data=(BIO_CONNECT *)b->ptr;
 421         if (data->state != CONN_S_OK)
 422                 {
 423                 ret=conn_state(b,data);
 424                 if (ret <= 0) return(ret);
 425                 }
 426
 427         errno=0;
 428 #if defined(WINDOWS)
 429         ret=send(b->num,in,inl,0);
 430 #else
 431         ret=write(b->num,in,inl);
 432 #endif
 433         BIO_clear_retry_flags(b);
 434         if (ret <= 0)
 435                 {
 436                 if (BIO_sock_should_retry(ret))
 437                         BIO_set_retry_write(b);
 438                 }
 439         return(ret);
 440         }
 441
 442 static long conn_ctrl(b,cmd,num,ptr)
 443 BIO *b;
 444 int cmd;
 445 long num;
 446 char *ptr;
 447         {
 448         BIO *dbio;
 449         int *ip;
 450         long ret=1;
 451         BIO_CONNECT *data;
 452
 453         data=(BIO_CONNECT *)b->ptr;
 454
 455         switch (cmd)
 456                 {
 457         case BIO_CTRL_RESET:
 458                 ret=0;
 459                 data->state=CONN_S_BEFORE;
 460                 conn_close_socket(b);
 461                 b->flags=0;
 462                 break;
 463         case BIO_C_DO_STATE_MACHINE:
 464                 /* use this one to start the connection */
 465                 if (!data->state != CONN_S_OK)
 466                         ret=(long)conn_state(b,data);
 467                 else
 468                         ret=1;
 469                 break;
 470         case BIO_C_SET_CONNECT:
 471                 if (ptr != NULL)
 472                         {
 473                         b->init=1;
 474                         if (num == 0)
 475                                 {
 476                                 if (data->param_hostname != NULL)
 477                                         Free(data->param_hostname);
 478                                 data->param_hostname=BUF_strdup(ptr);
 479                                 }
 480                         else if (num == 1)
 481                                 {
 482                                 if (data->param_port != NULL)
 483                                         Free(data->param_port);
 484                                 data->param_port=BUF_strdup(ptr);
 485                                 }
 486                         }
 487                 break;
 488         case BIO_C_SET_NBIO:
 489                 data->nbio=(int)num;
 490                 break;
 491         case BIO_C_GET_FD:
 492                 if (b->init)
 493                         {
 494                         ip=(int *)ptr;
 495                         if (ip != NULL)
 496                                 *ip=b->num;
 497                         ret=b->num;
 498                         }
 499                 else
 500                         ret= -1;
 501                 break;
 502         case BIO_CTRL_GET_CLOSE:
 503                 ret=b->shutdown;
 504                 break;
 505         case BIO_CTRL_SET_CLOSE:
 506                 b->shutdown=(int)num;
 507                 break;
 508         case BIO_CTRL_PENDING:
 509         case BIO_CTRL_WPENDING:
 510                 ret=0;
 511                 break;
 512         case BIO_CTRL_FLUSH:
 513                 break;
 514         case BIO_CTRL_DUP:
 515                 dbio=(BIO *)ptr;
 516                 if (data->param_port)
 517                         BIO_set_port(dbio,data->param_port);
 518                 if (data->param_hostname)
 519                         BIO_set_hostname(dbio,data->param_hostname);
 520                 BIO_set_nbio(dbio,data->nbio);
 521                 break;
 522
 523         default:
 524                 ret=0;
 525                 break;
 526                 }
 527         return(ret);
 528         }
 529
 530 static int conn_puts(bp,str)
 531 BIO *bp;
 532 char *str;
 533         {
 534         int n,ret;
 535
 536         n=strlen(str);
 537         ret=conn_write(bp,str,n);
 538         return(ret);
 539         }
 540
 541 BIO *BIO_new_connect(str)
 542 char *str;
 543         {
 544         BIO *ret;
 545
 546         ret=BIO_new(BIO_s_connect());
 547         if (ret == NULL) return(NULL);
 548         if (BIO_set_hostname(ret,str))
 549                 return(ret);
 550         else
 551                 {
 552                 BIO_free(ret);
 553                 return(NULL);
 554                 }
 555         }
 556
 557 #endif
 558