crypto/bio/bss_acpt.c

   1 /* crypto/bio/bss_acpt.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef NO_SOCK
  60
  61 #include <stdio.h>
  62 #include <errno.h>
  63 #define USE_SOCKETS
  64 #include "cryptlib.h"
  65 #include "bio.h"
  66
  67 /*      BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */
  68
  69 #ifdef WIN16
  70 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
  71 #else
  72 #define SOCKET_PROTOCOL IPPROTO_TCP
  73 #endif
  74
  75 typedef struct bio_accept_st
  76         {
  77         int state;
  78         char *param_addr;
  79
  80         int accept_sock;
  81         int accept_nbio;
  82
  83         char *addr;
  84         int nbio;
  85         /* If 0, it means normal, if 1, do a connect on bind failure,
  86          * and if there is no-one listening, bind with SO_REUSEADDR.
  87          * If 2, always use SO_REUSEADDR. */
  88         int bind_mode;
  89         BIO *bio_chain;
  90         } BIO_ACCEPT;
  91
  92 #ifndef NOPROTO
  93 static int acpt_write(BIO *h,char *buf,int num);
  94 static int acpt_read(BIO *h,char *buf,int size);
  95 static int acpt_puts(BIO *h,char *str);
  96 static long acpt_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  97 static int acpt_new(BIO *h);
  98 static int acpt_free(BIO *data);
  99 #else
 100 static int acpt_write();
 101 static int acpt_read();
 102 static int acpt_puts();
 103 static long acpt_ctrl();
 104 static int acpt_new();
 105 static int acpt_free();
 106 #endif
 107
 108 #ifndef NOPROTO
 109 static int acpt_state(BIO *b, BIO_ACCEPT *c);
 110 static void acpt_close_socket(BIO *data);
 111 BIO_ACCEPT *BIO_ACCEPT_new(void );
 112 void BIO_ACCEPT_free(BIO_ACCEPT *a);
 113
 114 #else
 115
 116 static int acpt_state();
 117 static void acpt_close_socket();
 118 BIO_ACCEPT *BIO_ACCEPT_new();
 119 void BIO_ACCEPT_free();
 120 #endif
 121
 122 #define ACPT_S_BEFORE                   1
 123 #define ACPT_S_GET_ACCEPT_SOCKET        2
 124 #define ACPT_S_OK                       3
 125
 126 static BIO_METHOD methods_acceptp=
 127         {
 128         BIO_TYPE_ACCEPT,
 129         "socket accept",
 130         acpt_write,
 131         acpt_read,
 132         acpt_puts,
 133         NULL, /* connect_gets, */
 134         acpt_ctrl,
 135         acpt_new,
 136         acpt_free,
 137         };
 138
 139 BIO_METHOD *BIO_s_accept(void)
 140         {
 141         return(&methods_acceptp);
 142         }
 143
 144 static int acpt_new(BIO *bi)
 145         {
 146         BIO_ACCEPT *ba;
 147
 148         bi->init=0;
 149         bi->num=INVALID_SOCKET;
 150         bi->flags=0;
 151         if ((ba=BIO_ACCEPT_new()) == NULL)
 152                 return(0);
 153         bi->ptr=(char *)ba;
 154         ba->state=ACPT_S_BEFORE;
 155         bi->shutdown=1;
 156         return(1);
 157         }
 158
 159 BIO_ACCEPT *BIO_ACCEPT_new(void)
 160         {
 161         BIO_ACCEPT *ret;
 162
 163         if ((ret=(BIO_ACCEPT *)Malloc(sizeof(BIO_ACCEPT))) == NULL)
 164                 return(NULL);
 165
 166         memset(ret,0,sizeof(BIO_ACCEPT));
 167         ret->accept_sock=INVALID_SOCKET;
 168         ret->bind_mode=BIO_BIND_NORMAL;
 169         return(ret);
 170         }
 171
 172 void BIO_ACCEPT_free(BIO_ACCEPT *a)
 173         {
 174         if(a == NULL)
 175             return;
 176
 177         if (a->param_addr != NULL) Free(a->param_addr);
 178         if (a->addr != NULL) Free(a->addr);
 179         if (a->bio_chain != NULL) BIO_free(a->bio_chain);
 180         Free(a);
 181         }
 182
 183 static void acpt_close_socket(BIO *bio)
 184         {
 185         BIO_ACCEPT *c;
 186
 187         c=(BIO_ACCEPT *)bio->ptr;
 188         if (c->accept_sock != INVALID_SOCKET)
 189                 {
 190                 shutdown(c->accept_sock,2);
 191                 closesocket(c->accept_sock);
 192                 c->accept_sock=INVALID_SOCKET;
 193                 bio->num=INVALID_SOCKET;
 194                 }
 195         }
 196
 197 static int acpt_free(BIO *a)
 198         {
 199         BIO_ACCEPT *data;
 200
 201         if (a == NULL) return(0);
 202         data=(BIO_ACCEPT *)a->ptr;
 203
 204         if (a->shutdown)
 205                 {
 206                 acpt_close_socket(a);
 207                 BIO_ACCEPT_free(data);
 208                 a->ptr=NULL;
 209                 a->flags=0;
 210                 a->init=0;
 211                 }
 212         return(1);
 213         }
 214
 215 static int acpt_state(BIO *b, BIO_ACCEPT *c)
 216         {
 217         BIO *bio=NULL,*dbio;
 218         int s= -1;
 219         int i;
 220
 221 again:
 222         switch (c->state)
 223                 {
 224         case ACPT_S_BEFORE:
 225                 if (c->param_addr == NULL)
 226                         {
 227                         BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED);
 228                         return(-1);
 229                         }
 230                 s=BIO_get_accept_socket(c->param_addr,c->bind_mode);
 231                 if (s == INVALID_SOCKET)
 232                         return(-1);
 233
 234                 if (c->accept_nbio)
 235                         {
 236                         if (!BIO_socket_nbio(s,1))
 237                                 {
 238                                 closesocket(s);
 239                                 BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
 240                                 return(-1);
 241                                 }
 242                         }
 243                 c->accept_sock=s;
 244                 b->num=s;
 245                 c->state=ACPT_S_GET_ACCEPT_SOCKET;
 246                 return(1);
 247                 /* break; */
 248         case ACPT_S_GET_ACCEPT_SOCKET:
 249                 if (b->next_bio != NULL)
 250                         {
 251                         c->state=ACPT_S_OK;
 252                         goto again;
 253                         }
 254                 i=BIO_accept(c->accept_sock,&(c->addr));
 255                 if (i < 0) return(i);
 256                 bio=BIO_new_socket(i,BIO_CLOSE);
 257                 if (bio == NULL) goto err;
 258
 259                 BIO_set_callback(bio,BIO_get_callback(b));
 260                 BIO_set_callback_arg(bio,BIO_get_callback_arg(b));
 261
 262                 if (c->nbio)
 263                         {
 264                         if (!BIO_socket_nbio(i,1))
 265                                 {
 266                                 BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
 267                                 goto err;
 268                                 }
 269                         }
 270
 271                 /* If the accept BIO has an bio_chain, we dup it and
 272                  * put the new socket at the end. */
 273                 if (c->bio_chain != NULL)
 274                         {
 275                         if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL)
 276                                 goto err;
 277                         if (!BIO_push(dbio,bio)) goto err;
 278                         bio=dbio;
 279                         }
 280                 if (BIO_push(b,bio) == NULL) goto err;
 281
 282                 c->state=ACPT_S_OK;
 283                 return(1);
 284 err:
 285                 if (bio != NULL)
 286                         BIO_free(bio);
 287                 else if (s >= 0)
 288                         closesocket(s);
 289                 return(0);
 290                 /* break; */
 291         case ACPT_S_OK:
 292                 if (b->next_bio == NULL)
 293                         {
 294                         c->state=ACPT_S_GET_ACCEPT_SOCKET;
 295                         goto again;
 296                         }
 297                 return(1);
 298                 /* break; */
 299         default:
 300                 return(0);
 301                 /* break; */
 302                 }
 303
 304         }
 305
 306 static int acpt_read(BIO *b, char *out, int outl)
 307         {
 308         int ret=0;
 309         BIO_ACCEPT *data;
 310
 311         BIO_clear_retry_flags(b);
 312         data=(BIO_ACCEPT *)b->ptr;
 313
 314         while (b->next_bio == NULL)
 315                 {
 316                 ret=acpt_state(b,data);
 317                 if (ret <= 0) return(ret);
 318                 }
 319
 320         ret=BIO_read(b->next_bio,out,outl);
 321         BIO_copy_next_retry(b);
 322         return(ret);
 323         }
 324
 325 static int acpt_write(BIO *b, char *in, int inl)
 326         {
 327         int ret;
 328         BIO_ACCEPT *data;
 329
 330         BIO_clear_retry_flags(b);
 331         data=(BIO_ACCEPT *)b->ptr;
 332
 333         while (b->next_bio == NULL)
 334                 {
 335                 ret=acpt_state(b,data);
 336                 if (ret <= 0) return(ret);
 337                 }
 338
 339         ret=BIO_write(b->next_bio,in,inl);
 340         BIO_copy_next_retry(b);
 341         return(ret);
 342         }
 343
 344 static long acpt_ctrl(BIO *b, int cmd, long num, char *ptr)
 345         {
 346         BIO *dbio;
 347         int *ip;
 348         long ret=1;
 349         BIO_ACCEPT *data;
 350         char **pp;
 351
 352         data=(BIO_ACCEPT *)b->ptr;
 353
 354         switch (cmd)
 355                 {
 356         case BIO_CTRL_RESET:
 357                 ret=0;
 358                 data->state=ACPT_S_BEFORE;
 359                 acpt_close_socket(b);
 360                 b->flags=0;
 361                 break;
 362         case BIO_C_DO_STATE_MACHINE:
 363                 /* use this one to start the connection */
 364                 ret=(long)acpt_state(b,data);
 365                 break;
 366         case BIO_C_SET_ACCEPT:
 367                 if (ptr != NULL)
 368                         {
 369                         if (num == 0)
 370                                 {
 371                                 b->init=1;
 372                                 if (data->param_addr != NULL)
 373                                         Free(data->param_addr);
 374                                 data->param_addr=BUF_strdup(ptr);
 375                                 }
 376                         else if (num == 1)
 377                                 {
 378                                 data->accept_nbio=(ptr != NULL);
 379                                 }
 380                         else if (num == 2)
 381                                 {
 382                                 if (data->bio_chain != NULL)
 383                                         BIO_free(data->bio_chain);
 384                                 data->bio_chain=(BIO *)ptr;
 385                                 }
 386                         }
 387                 break;
 388         case BIO_C_SET_NBIO:
 389                 data->nbio=(int)num;
 390                 break;
 391         case BIO_C_SET_FD:
 392                 b->init=1;
 393                 b->num= *((int *)ptr);
 394                 data->accept_sock=b->num;
 395                 data->state=ACPT_S_GET_ACCEPT_SOCKET;
 396                 b->shutdown=(int)num;
 397                 b->init=1;
 398                 break;
 399         case BIO_C_GET_FD:
 400                 if (b->init)
 401                         {
 402                         ip=(int *)ptr;
 403                         if (ip != NULL)
 404                                 *ip=data->accept_sock;
 405                         ret=data->accept_sock;
 406                         }
 407                 else
 408                         ret= -1;
 409                 break;
 410         case BIO_C_GET_ACCEPT:
 411                 if (b->init)
 412                         {
 413                         if (ptr != NULL)
 414                                 {
 415                                 pp=(char **)ptr;
 416                                 *pp=data->param_addr;
 417                                 }
 418                         else
 419                                 ret= -1;
 420                         }
 421                 else
 422                         ret= -1;
 423                 break;
 424         case BIO_CTRL_GET_CLOSE:
 425                 ret=b->shutdown;
 426                 break;
 427         case BIO_CTRL_SET_CLOSE:
 428                 b->shutdown=(int)num;
 429                 break;
 430         case BIO_CTRL_PENDING:
 431         case BIO_CTRL_WPENDING:
 432                 ret=0;
 433                 break;
 434         case BIO_CTRL_FLUSH:
 435                 break;
 436         case BIO_C_SET_BIND_MODE:
 437                 data->bind_mode=(int)num;
 438                 break;
 439         case BIO_C_GET_BIND_MODE:
 440                 ret=(long)data->bind_mode;
 441                 break;
 442         case BIO_CTRL_DUP:
 443                 dbio=(BIO *)ptr;
 444 /*              if (data->param_port) EAY EAY
 445                         BIO_set_port(dbio,data->param_port);
 446                 if (data->param_hostname)
 447                         BIO_set_hostname(dbio,data->param_hostname);
 448                 BIO_set_nbio(dbio,data->nbio); */
 449                 break;
 450
 451         default:
 452                 ret=0;
 453                 break;
 454                 }
 455         return(ret);
 456         }
 457
 458 static int acpt_puts(BIO *bp, char *str)
 459         {
 460         int n,ret;
 461
 462         n=strlen(str);
 463         ret=acpt_write(bp,str,n);
 464         return(ret);
 465         }
 466
 467 BIO *BIO_new_accept(char *str)
 468         {
 469         BIO *ret;
 470
 471         ret=BIO_new(BIO_s_accept());
 472         if (ret == NULL) return(NULL);
 473         if (BIO_set_accept_port(ret,str))
 474                 return(ret);
 475         else
 476                 {
 477                 BIO_free(ret);
 478                 return(NULL);
 479                 }
 480         }
 481
 482 #endif