crypto/bio/bss_sock.c

   1 /* crypto/bio/bss_sock.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 #if !defined(NO_SOCK) || defined(BIO_FD)
  60
  61 #include <stdio.h>
  62 #include <errno.h>
  63 #define USE_SOCKETS
  64 #include "cryptlib.h"
  65 #include "bio.h"
  66
  67 #ifndef BIO_FD
  68 #ifndef NOPROTO
  69 static int sock_write(BIO *h,char *buf,int num);
  70 static int sock_read(BIO *h,char *buf,int size);
  71 static int sock_puts(BIO *h,char *str);
  72 static long sock_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  73 static int sock_new(BIO *h);
  74 static int sock_free(BIO *data);
  75 int BIO_sock_should_retry(int s);
  76 #else
  77 static int sock_write();
  78 static int sock_read();
  79 static int sock_puts();
  80 static long sock_ctrl();
  81 static int sock_new();
  82 static int sock_free();
  83 int BIO_sock_should_retry();
  84 #endif
  85
  86 #else
  87
  88 #ifndef NOPROTO
  89 static int fd_write(BIO *h,char *buf,int num);
  90 static int fd_read(BIO *h,char *buf,int size);
  91 static int fd_puts(BIO *h,char *str);
  92 static long fd_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  93 static int fd_new(BIO *h);
  94 static int fd_free(BIO *data);
  95 int BIO_fd_should_retry(int s);
  96 #else
  97 static int fd_write();
  98 static int fd_read();
  99 static int fd_puts();
 100 static long fd_ctrl();
 101 static int fd_new();
 102 static int fd_free();
 103 int BIO_fd_should_retry();
 104 #endif
 105 #endif
 106
 107 #ifndef BIO_FD
 108 static BIO_METHOD methods_sockp=
 109         {
 110         BIO_TYPE_SOCKET,"socket",
 111         sock_write,
 112         sock_read,
 113         sock_puts,
 114         NULL, /* sock_gets, */
 115         sock_ctrl,
 116         sock_new,
 117         sock_free,
 118         };
 119
 120 BIO_METHOD *BIO_s_socket()
 121         {
 122         return(&methods_sockp);
 123         }
 124 #else
 125 static BIO_METHOD methods_fdp=
 126         {
 127         BIO_TYPE_FD,"file descriptor",
 128         fd_write,
 129         fd_read,
 130         fd_puts,
 131         NULL, /* fd_gets, */
 132         fd_ctrl,
 133         fd_new,
 134         fd_free,
 135         };
 136
 137 BIO_METHOD *BIO_s_fd()
 138         {
 139         return(&methods_fdp);
 140         }
 141 #endif
 142
 143 #ifndef BIO_FD
 144 BIO *BIO_new_socket(fd,close_flag)
 145 #else
 146 BIO *BIO_new_fd(fd,close_flag)
 147 #endif
 148 int fd;
 149 int close_flag;
 150         {
 151         BIO *ret;
 152
 153 #ifndef BIO_FD
 154         ret=BIO_new(BIO_s_socket());
 155 #else
 156         ret=BIO_new(BIO_s_fd());
 157 #endif
 158         if (ret == NULL) return(NULL);
 159         BIO_set_fd(ret,fd,close_flag);
 160         return(ret);
 161         }
 162
 163 #ifndef BIO_FD
 164 static int sock_new(bi)
 165 #else
 166 static int fd_new(bi)
 167 #endif
 168 BIO *bi;
 169         {
 170         bi->init=0;
 171         bi->num=0;
 172         bi->ptr=NULL;
 173         bi->flags=0;
 174         return(1);
 175         }
 176
 177 #ifndef BIO_FD
 178 static int sock_free(a)
 179 #else
 180 static int fd_free(a)
 181 #endif
 182 BIO *a;
 183         {
 184         if (a == NULL) return(0);
 185         if (a->shutdown)
 186                 {
 187                 if (a->init)
 188                         {
 189 #ifndef BIO_FD
 190                         shutdown(a->num,2);
 191 # ifdef WINDOWS
 192                         closesocket(a->num);
 193 # else
 194                         close(a->num);
 195 # endif
 196 #else                   /* BIO_FD */
 197                         close(a->num);
 198 #endif
 199
 200                         }
 201                 a->init=0;
 202                 a->flags=0;
 203                 }
 204         return(1);
 205         }
 206
 207 #ifndef BIO_FD
 208 static int sock_read(b,out,outl)
 209 #else
 210 static int fd_read(b,out,outl)
 211 #endif
 212 BIO *b;
 213 char *out;
 214 int outl;
 215         {
 216         int ret=0;
 217
 218         if (out != NULL)
 219                 {
 220                 errno=0;
 221 #if defined(WINDOWS) && !defined(BIO_FD)
 222                 ret=recv(b->num,out,outl,0);
 223 #else
 224                 ret=read(b->num,out,outl);
 225 #endif
 226                 BIO_clear_retry_flags(b);
 227                 if (ret <= 0)
 228                         {
 229 #ifndef BIO_FD
 230                         if (BIO_sock_should_retry(ret))
 231 #else
 232                         if (BIO_fd_should_retry(ret))
 233 #endif
 234                                 BIO_set_retry_read(b);
 235                         }
 236                 }
 237         return(ret);
 238         }
 239
 240 #ifndef BIO_FD
 241 static int sock_write(b,in,inl)
 242 #else
 243 static int fd_write(b,in,inl)
 244 #endif
 245 BIO *b;
 246 char *in;
 247 int inl;
 248         {
 249         int ret;
 250
 251         errno=0;
 252 #if defined(WINDOWS) && !defined(BIO_FD)
 253         ret=send(b->num,in,inl,0);
 254 #else
 255         ret=write(b->num,in,inl);
 256 #endif
 257         BIO_clear_retry_flags(b);
 258         if (ret <= 0)
 259                 {
 260 #ifndef BIO_FD
 261                 if (BIO_sock_should_retry(ret))
 262 #else
 263                 if (BIO_fd_should_retry(ret))
 264 #endif
 265                         BIO_set_retry_write(b);
 266                 }
 267         return(ret);
 268         }
 269
 270 #ifndef BIO_FD
 271 static long sock_ctrl(b,cmd,num,ptr)
 272 #else
 273 static long fd_ctrl(b,cmd,num,ptr)
 274 #endif
 275 BIO *b;
 276 int cmd;
 277 long num;
 278 char *ptr;
 279         {
 280         long ret=1;
 281         int *ip;
 282
 283         switch (cmd)
 284                 {
 285         case BIO_CTRL_RESET:
 286 #ifdef BIO_FD
 287                 ret=(long)lseek(b->num,0,0);
 288 #else
 289                 ret=0;
 290 #endif
 291                 break;
 292         case BIO_CTRL_INFO:
 293                 ret=0;
 294                 break;
 295         case BIO_C_SET_FD:
 296 #ifndef BIO_FD
 297                 sock_free(b);
 298 #else
 299                 fd_free(b);
 300 #endif
 301                 b->num= *((int *)ptr);
 302                 b->shutdown=(int)num;
 303                 b->init=1;
 304                 break;
 305         case BIO_C_GET_FD:
 306                 if (b->init)
 307                         {
 308                         ip=(int *)ptr;
 309                         if (ip != NULL) *ip=b->num;
 310                         ret=b->num;
 311                         }
 312                 else
 313                         ret= -1;
 314                 break;
 315         case BIO_CTRL_GET_CLOSE:
 316                 ret=b->shutdown;
 317                 break;
 318         case BIO_CTRL_SET_CLOSE:
 319                 b->shutdown=(int)num;
 320                 break;
 321         case BIO_CTRL_PENDING:
 322         case BIO_CTRL_WPENDING:
 323                 ret=0;
 324                 break;
 325         case BIO_CTRL_DUP:
 326         case BIO_CTRL_FLUSH:
 327                 ret=1;
 328                 break;
 329                 break;
 330         default:
 331                 ret=0;
 332                 break;
 333                 }
 334         return(ret);
 335         }
 336
 337 #ifdef undef
 338 static int sock_gets(bp,buf,size)
 339 BIO *bp;
 340 char *buf;
 341 int size;
 342         {
 343         return(-1);
 344         }
 345 #endif
 346
 347 #ifndef BIO_FD
 348 static int sock_puts(bp,str)
 349 #else
 350 static int fd_puts(bp,str)
 351 #endif
 352 BIO *bp;
 353 char *str;
 354         {
 355         int n,ret;
 356
 357         n=strlen(str);
 358 #ifndef BIO_FD
 359         ret=sock_write(bp,str,n);
 360 #else
 361         ret=fd_write(bp,str,n);
 362 #endif
 363         return(ret);
 364         }
 365
 366 #ifndef BIO_FD
 367 int BIO_sock_should_retry(i)
 368 #else
 369 int BIO_fd_should_retry(i)
 370 #endif
 371 int i;
 372         {
 373         if ((i == 0) || (i == -1))
 374                 {
 375 #if !defined(BIO_FD) && defined(WINDOWS)
 376                 errno=WSAGetLastError();
 377 #endif
 378
 379 #if defined(WINDOWS) /* more microsoft stupidity */
 380                 if ((i == -1) && (errno == 0))
 381                         return(1);
 382 #endif
 383 #ifndef BIO_FD
 384                 return(BIO_sock_non_fatal_error(errno));
 385 #else
 386                 return(BIO_fd_non_fatal_error(errno));
 387 #endif
 388                 }
 389         return(0);
 390         }
 391
 392 #ifndef BIO_FD
 393 int BIO_sock_non_fatal_error(err)
 394 #else
 395 int BIO_fd_non_fatal_error(err)
 396 #endif
 397 int err;
 398         {
 399         switch (err)
 400                 {
 401 #if !defined(BIO_FD) && defined(WINDOWS)
 402 # if defined(WSAEWOULDBLOCK)
 403         case WSAEWOULDBLOCK:
 404 # endif
 405
 406 # if defined(WSAENOTCONN)
 407         case WSAENOTCONN:
 408 # endif
 409 #endif
 410
 411 #ifdef EWOULDBLOCK
 412 # ifdef WSAEWOULDBLOCK
 413 #  if WSAEWOULDBLOCK != EWOULDBLOCK
 414         case EWOULDBLOCK:
 415 #  endif
 416 # else
 417         case EWOULDBLOCK:
 418 # endif
 419 #endif
 420
 421 #ifdef EINTR
 422         case EINTR:
 423 #endif
 424
 425 #ifdef EAGAIN
 426 #if EWOULDBLOCK != EAGAIN
 427         case EAGAIN:
 428 # endif
 429 #endif
 430
 431 #ifdef EPROTO
 432         case EPROTO:
 433 #endif
 434
 435 #ifdef EINPROGRESS
 436         case EINPROGRESS:
 437 #endif
 438
 439 #ifdef EALREADY
 440         case EALREADY:
 441 #endif
 442                 return(1);
 443                 break;
 444         default:
 445                 break;
 446                 }
 447         return(0);
 448         }
 449 #endif