crypto/bio/bss_acpt.c

   1 /* crypto/bio/bss_acpt.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_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         BIO *bio_chain;
  86         } BIO_ACCEPT;
  87
  88 #ifndef NOPROTO
  89 static int acpt_write(BIO *h,char *buf,int num);
  90 static int acpt_read(BIO *h,char *buf,int size);
  91 static int acpt_puts(BIO *h,char *str);
  92 static long acpt_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  93 static int acpt_new(BIO *h);
  94 static int acpt_free(BIO *data);
  95 #else
  96 static int acpt_write();
  97 static int acpt_read();
  98 static int acpt_puts();
  99 static long acpt_ctrl();
 100 static int acpt_new();
 101 static int acpt_free();
 102 #endif
 103
 104 #ifndef NOPROTO
 105 static int acpt_state(BIO *b, BIO_ACCEPT *c);
 106 static void acpt_close_socket(BIO *data);
 107 BIO_ACCEPT *BIO_ACCEPT_new(void );
 108 void BIO_ACCEPT_free(BIO_ACCEPT *a);
 109
 110 #else
 111
 112 static int acpt_state();
 113 static void acpt_close_socket();
 114 BIO_ACCEPT *BIO_ACCEPT_new();
 115 void BIO_ACCEPT_free();
 116 #endif
 117
 118 #define ACPT_S_BEFORE                   1
 119 #define ACPT_S_GET_ACCEPT_SOCKET        2
 120 #define ACPT_S_OK                       3
 121
 122 static BIO_METHOD methods_acceptp=
 123         {
 124         BIO_TYPE_ACCEPT,"socket accept",
 125         acpt_write,
 126         acpt_read,
 127         acpt_puts,
 128         NULL, /* connect_gets, */
 129         acpt_ctrl,
 130         acpt_new,
 131         acpt_free,
 132         };
 133
 134 BIO_METHOD *BIO_s_accept()
 135         {
 136         return(&methods_acceptp);
 137         }
 138
 139 static int acpt_new(bi)
 140 BIO *bi;
 141         {
 142         BIO_ACCEPT *ba;
 143
 144         bi->init=0;
 145         bi->num=INVALID_SOCKET;
 146         bi->flags=0;
 147         if ((ba=BIO_ACCEPT_new()) == NULL)
 148                 return(0);
 149         bi->ptr=(char *)ba;
 150         ba->state=ACPT_S_BEFORE;
 151         bi->shutdown=1;
 152         return(1);
 153         }
 154
 155 BIO_ACCEPT *BIO_ACCEPT_new()
 156         {
 157         BIO_ACCEPT *ret;
 158
 159         if ((ret=(BIO_ACCEPT *)Malloc(sizeof(BIO_ACCEPT))) == NULL)
 160                 return(NULL);
 161
 162         memset(ret,0,sizeof(BIO_ACCEPT));
 163         ret->accept_sock=INVALID_SOCKET;
 164         return(ret);
 165         }
 166
 167 void BIO_ACCEPT_free(a)
 168 BIO_ACCEPT *a;
 169         {
 170         if (a->param_addr != NULL) Free(a->param_addr);
 171         if (a->addr != NULL) Free(a->addr);
 172         if (a->bio_chain != NULL) BIO_free(a->bio_chain);
 173         Free(a);
 174         }
 175
 176 static void acpt_close_socket(bio)
 177 BIO *bio;
 178         {
 179         BIO_ACCEPT *c;
 180
 181         c=(BIO_ACCEPT *)bio->ptr;
 182         if (c->accept_sock != INVALID_SOCKET)
 183                 {
 184                 shutdown(c->accept_sock,2);
 185 # ifdef WINDOWS
 186                 closesocket(c->accept_sock);
 187 # else
 188                 close(c->accept_sock);
 189 # endif
 190                 c->accept_sock=INVALID_SOCKET;
 191                 bio->num=INVALID_SOCKET;
 192                 }
 193         }
 194
 195 static int acpt_free(a)
 196 BIO *a;
 197         {
 198         BIO_ACCEPT *data;
 199
 200         if (a == NULL) return(0);
 201         data=(BIO_ACCEPT *)a->ptr;
 202
 203         if (a->shutdown)
 204                 {
 205                 acpt_close_socket(a);
 206                 BIO_ACCEPT_free(data);
 207                 a->ptr=NULL;
 208                 a->flags=0;
 209                 a->init=0;
 210                 }
 211         return(1);
 212         }
 213
 214 static int acpt_state(b,c)
 215 BIO *b;
 216 BIO_ACCEPT *c;
 217         {
 218         BIO *bio=NULL,*dbio;
 219         unsigned long l=1;
 220         int s= -1;
 221         int i;
 222
 223 again:
 224         switch (c->state)
 225                 {
 226         case ACPT_S_BEFORE:
 227                 if (c->param_addr == NULL)
 228                         {
 229                         BIOerr(BIO_F_ACPT_STATE,BIO_R_NO_ACCEPT_PORT_SPECIFIED);
 230                         return(-1);
 231                         }
 232                 s=BIO_get_accept_socket(c->param_addr);
 233                 if (s == INVALID_SOCKET)
 234                         return(-1);
 235
 236 #ifdef FIONBIO
 237                 if (c->accept_nbio)
 238                         {
 239                         i=BIO_socket_ioctl(b->num,FIONBIO,&l);
 240                         if (i < 0)
 241                                 {
 242 #ifdef WINDOWS
 243                                 closesocket(s);
 244 #else
 245                                 close(s);
 246 # endif
 247                                 BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
 248                                 return(-1);
 249                                 }
 250                         }
 251 #endif
 252                 c->accept_sock=s;
 253                 b->num=s;
 254                 c->state=ACPT_S_GET_ACCEPT_SOCKET;
 255                 return(1);
 256                 break;
 257         case ACPT_S_GET_ACCEPT_SOCKET:
 258                 if (b->next_bio != NULL)
 259                         {
 260                         c->state=ACPT_S_OK;
 261                         goto again;
 262                         }
 263                 i=BIO_accept(c->accept_sock,&(c->addr));
 264                 if (i < 0) return(i);
 265                 bio=BIO_new_socket(i,BIO_CLOSE);
 266                 if (bio == NULL) goto err;
 267
 268                 BIO_set_callback(bio,BIO_get_callback(b));
 269                 BIO_set_callback_arg(bio,BIO_get_callback_arg(b));
 270
 271 #ifdef FIONBIO
 272                 if (c->nbio)
 273                         {
 274                         i=BIO_socket_ioctl(i,FIONBIO,&l);
 275                         if (i < 0)
 276                                 {
 277                                 BIOerr(BIO_F_ACPT_STATE,BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
 278                                 goto err;
 279                                 }
 280                         }
 281 #endif
 282
 283                 /* If the accept BIO has an bio_chain, we dup it and
 284                  * put the new socket at the end. */
 285                 if (c->bio_chain != NULL)
 286                         {
 287                         if ((dbio=BIO_dup_chain(c->bio_chain)) == NULL)
 288                                 goto err;
 289                         if (!BIO_push(dbio,bio)) goto err;
 290                         bio=dbio;
 291                         }
 292                 if (BIO_push(b,bio) == NULL) goto err;
 293
 294                 c->state=ACPT_S_OK;
 295                 return(1);
 296 err:
 297                 if (bio != NULL)
 298                         BIO_free(bio);
 299                 else if (s >= 0)
 300                         {
 301 #ifdef WINDOWS
 302                         closesocket(s);
 303 #else
 304                         close(s);
 305 # endif
 306                         }
 307                 return(0);
 308                 break;
 309         case ACPT_S_OK:
 310                 if (b->next_bio == NULL)
 311                         {
 312                         c->state=ACPT_S_GET_ACCEPT_SOCKET;
 313                         goto again;
 314                         }
 315                 return(1);
 316                 break;
 317         default:
 318                 return(0);
 319                 break;
 320                 }
 321
 322         }
 323
 324 static int acpt_read(b,out,outl)
 325 BIO *b;
 326 char *out;
 327 int outl;
 328         {
 329         int ret=0;
 330         BIO_ACCEPT *data;
 331
 332         BIO_clear_retry_flags(b);
 333         data=(BIO_ACCEPT *)b->ptr;
 334
 335         while (b->next_bio == NULL)
 336                 {
 337                 ret=acpt_state(b,data);
 338                 if (ret <= 0) return(ret);
 339                 }
 340
 341         ret=BIO_read(b->next_bio,out,outl);
 342         BIO_copy_next_retry(b);
 343         return(ret);
 344         }
 345
 346 static int acpt_write(b,in,inl)
 347 BIO *b;
 348 char *in;
 349 int inl;
 350         {
 351         int ret;
 352         BIO_ACCEPT *data;
 353
 354         BIO_clear_retry_flags(b);
 355         data=(BIO_ACCEPT *)b->ptr;
 356
 357         while (b->next_bio == NULL)
 358                 {
 359                 ret=acpt_state(b,data);
 360                 if (ret <= 0) return(ret);
 361                 }
 362
 363         ret=BIO_write(b->next_bio,in,inl);
 364         BIO_copy_next_retry(b);
 365         return(ret);
 366         }
 367
 368 static long acpt_ctrl(b,cmd,num,ptr)
 369 BIO *b;
 370 int cmd;
 371 long num;
 372 char *ptr;
 373         {
 374         BIO *dbio;
 375         int *ip;
 376         long ret=1;
 377         BIO_ACCEPT *data;
 378
 379         data=(BIO_ACCEPT *)b->ptr;
 380
 381         switch (cmd)
 382                 {
 383         case BIO_CTRL_RESET:
 384                 ret=0;
 385                 data->state=ACPT_S_BEFORE;
 386                 acpt_close_socket(b);
 387                 b->flags=0;
 388                 break;
 389         case BIO_C_DO_STATE_MACHINE:
 390                 /* use this one to start the connection */
 391                 ret=(long)acpt_state(b,data);
 392                 break;
 393         case BIO_C_SET_ACCEPT:
 394                 if (ptr != NULL)
 395                         {
 396                         if (num == 0)
 397                                 {
 398                                 b->init=1;
 399                                 if (data->param_addr != NULL)
 400                                         Free(data->param_addr);
 401                                 data->param_addr=BUF_strdup(ptr);
 402                                 }
 403                         else if (num == 1)
 404                                 {
 405                                 data->accept_nbio=(ptr != NULL);
 406                                 }
 407                         else if (num == 2)
 408                                 {
 409                                 if (data->bio_chain != NULL)
 410                                         BIO_free(data->bio_chain);
 411                                 data->bio_chain=(BIO *)ptr;
 412                                 }
 413                         }
 414                 break;
 415         case BIO_C_SET_NBIO:
 416                 data->nbio=(int)num;
 417                 break;
 418         case BIO_C_GET_FD:
 419                 if (b->init)
 420                         {
 421                         ip=(int *)ptr;
 422                         if (ip != NULL)
 423                                 *ip=data->accept_sock;
 424                         ret=b->num;
 425                         }
 426                 else
 427                         ret= -1;
 428                 break;
 429         case BIO_CTRL_GET_CLOSE:
 430                 ret=b->shutdown;
 431                 break;
 432         case BIO_CTRL_SET_CLOSE:
 433                 b->shutdown=(int)num;
 434                 break;
 435         case BIO_CTRL_PENDING:
 436         case BIO_CTRL_WPENDING:
 437                 ret=0;
 438                 break;
 439         case BIO_CTRL_FLUSH:
 440                 break;
 441         case BIO_CTRL_DUP:
 442                 dbio=(BIO *)ptr;
 443 /*              if (data->param_port) EAY EAY
 444                         BIO_set_port(dbio,data->param_port);
 445                 if (data->param_hostname)
 446                         BIO_set_hostname(dbio,data->param_hostname);
 447                 BIO_set_nbio(dbio,data->nbio); */
 448                 break;
 449
 450         default:
 451                 ret=0;
 452                 break;
 453                 }
 454         return(ret);
 455         }
 456
 457 static int acpt_puts(bp,str)
 458 BIO *bp;
 459 char *str;
 460         {
 461         int n,ret;
 462
 463         n=strlen(str);
 464         ret=acpt_write(bp,str,n);
 465         return(ret);
 466         }
 467
 468 BIO *BIO_new_accept(str)
 469 char *str;
 470         {
 471         BIO *ret;
 472
 473         ret=BIO_new(BIO_s_accept());
 474         if (ret == NULL) return(NULL);
 475         if (BIO_set_accept_port(ret,str))
 476                 return(ret);
 477         else
 478                 {
 479                 BIO_free(ret);
 480                 return(NULL);
 481                 }
 482         }
 483
 484 #endif