crypto/bio/bss_sock.c

   1 /* crypto/bio/bss_sock.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 #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 <openssl/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,
 111         "socket",
 112         sock_write,
 113         sock_read,
 114         sock_puts,
 115         NULL, /* sock_gets, */
 116         sock_ctrl,
 117         sock_new,
 118         sock_free,
 119         };
 120
 121 BIO_METHOD *BIO_s_socket(void)
 122         {
 123         return(&methods_sockp);
 124         }
 125 #else
 126 static BIO_METHOD methods_fdp=
 127         {
 128         BIO_TYPE_FD,"file descriptor",
 129         fd_write,
 130         fd_read,
 131         fd_puts,
 132         NULL, /* fd_gets, */
 133         fd_ctrl,
 134         fd_new,
 135         fd_free,
 136         };
 137
 138 BIO_METHOD *BIO_s_fd(void)
 139         {
 140         return(&methods_fdp);
 141         }
 142 #endif
 143
 144 #ifndef BIO_FD
 145 BIO *BIO_new_socket(int fd, int close_flag)
 146 #else
 147 BIO *BIO_new_fd(int fd,int close_flag)
 148 #endif
 149         {
 150         BIO *ret;
 151
 152 #ifndef BIO_FD
 153         ret=BIO_new(BIO_s_socket());
 154 #else
 155         ret=BIO_new(BIO_s_fd());
 156 #endif
 157         if (ret == NULL) return(NULL);
 158         BIO_set_fd(ret,fd,close_flag);
 159         return(ret);
 160         }
 161
 162 #ifndef BIO_FD
 163 static int sock_new(BIO *bi)
 164 #else
 165 static int fd_new(BIO *bi)
 166 #endif
 167         {
 168         bi->init=0;
 169         bi->num=0;
 170         bi->ptr=NULL;
 171         bi->flags=0;
 172         return(1);
 173         }
 174
 175 #ifndef BIO_FD
 176 static int sock_free(BIO *a)
 177 #else
 178 static int fd_free(BIO *a)
 179 #endif
 180         {
 181         if (a == NULL) return(0);
 182         if (a->shutdown)
 183                 {
 184                 if (a->init)
 185                         {
 186 #ifndef BIO_FD
 187                         shutdown(a->num,2);
 188                         closesocket(a->num);
 189 #else                   /* BIO_FD */
 190                         close(a->num);
 191 #endif
 192
 193                         }
 194                 a->init=0;
 195                 a->flags=0;
 196                 }
 197         return(1);
 198         }
 199
 200 #ifndef BIO_FD
 201 static int sock_read(BIO *b, char *out, int outl)
 202 #else
 203 static int fd_read(BIO *b, char *out,int outl)
 204 #endif
 205         {
 206         int ret=0;
 207
 208         if (out != NULL)
 209                 {
 210 #ifndef BIO_FD
 211                 clear_socket_error();
 212                 ret=readsocket(b->num,out,outl);
 213 #else
 214                 clear_sys_error();
 215                 ret=read(b->num,out,outl);
 216 #endif
 217                 BIO_clear_retry_flags(b);
 218                 if (ret <= 0)
 219                         {
 220 #ifndef BIO_FD
 221                         if (BIO_sock_should_retry(ret))
 222 #else
 223                         if (BIO_fd_should_retry(ret))
 224 #endif
 225                                 BIO_set_retry_read(b);
 226                         }
 227                 }
 228         return(ret);
 229         }
 230
 231 #ifndef BIO_FD
 232 static int sock_write(BIO *b, char *in, int inl)
 233 #else
 234 static int fd_write(BIO *b, char *in, int inl)
 235 #endif
 236         {
 237         int ret;
 238
 239 #ifndef BIO_FD
 240         clear_socket_error();
 241         ret=writesocket(b->num,in,inl);
 242 #else
 243         clear_sys_error();
 244         ret=write(b->num,in,inl);
 245 #endif
 246         BIO_clear_retry_flags(b);
 247         if (ret <= 0)
 248                 {
 249 #ifndef BIO_FD
 250                 if (BIO_sock_should_retry(ret))
 251 #else
 252                 if (BIO_fd_should_retry(ret))
 253 #endif
 254                         BIO_set_retry_write(b);
 255                 }
 256         return(ret);
 257         }
 258
 259 #ifndef BIO_FD
 260 static long sock_ctrl(BIO *b, int cmd, long num, char *ptr)
 261 #else
 262 static long fd_ctrl(BIO *b, int cmd, long num, char *ptr)
 263 #endif
 264         {
 265         long ret=1;
 266         int *ip;
 267
 268         switch (cmd)
 269                 {
 270         case BIO_CTRL_RESET:
 271                 num=0;
 272         case BIO_C_FILE_SEEK:
 273 #ifdef BIO_FD
 274                 ret=(long)lseek(b->num,num,0);
 275 #else
 276                 ret=0;
 277 #endif
 278                 break;
 279         case BIO_C_FILE_TELL:
 280         case BIO_CTRL_INFO:
 281 #ifdef BIO_FD
 282                 ret=(long)lseek(b->num,0,1);
 283 #else
 284                 ret=0;
 285 #endif
 286                 break;
 287         case BIO_C_SET_FD:
 288 #ifndef BIO_FD
 289                 sock_free(b);
 290 #else
 291                 fd_free(b);
 292 #endif
 293                 b->num= *((int *)ptr);
 294                 b->shutdown=(int)num;
 295                 b->init=1;
 296                 break;
 297         case BIO_C_GET_FD:
 298                 if (b->init)
 299                         {
 300                         ip=(int *)ptr;
 301                         if (ip != NULL) *ip=b->num;
 302                         ret=b->num;
 303                         }
 304                 else
 305                         ret= -1;
 306                 break;
 307         case BIO_CTRL_GET_CLOSE:
 308                 ret=b->shutdown;
 309                 break;
 310         case BIO_CTRL_SET_CLOSE:
 311                 b->shutdown=(int)num;
 312                 break;
 313         case BIO_CTRL_PENDING:
 314         case BIO_CTRL_WPENDING:
 315                 ret=0;
 316                 break;
 317         case BIO_CTRL_DUP:
 318         case BIO_CTRL_FLUSH:
 319                 ret=1;
 320                 break;
 321         default:
 322                 ret=0;
 323                 break;
 324                 }
 325         return(ret);
 326         }
 327
 328 #ifdef undef
 329 static int sock_gets(BIO *bp, char *buf,int size)
 330         {
 331         return(-1);
 332         }
 333 #endif
 334
 335 #ifndef BIO_FD
 336 static int sock_puts(BIO *bp, char *str)
 337 #else
 338 static int fd_puts(BIO *bp, char *str)
 339 #endif
 340         {
 341         int n,ret;
 342
 343         n=strlen(str);
 344 #ifndef BIO_FD
 345         ret=sock_write(bp,str,n);
 346 #else
 347         ret=fd_write(bp,str,n);
 348 #endif
 349         return(ret);
 350         }
 351
 352 #ifndef BIO_FD
 353 int BIO_sock_should_retry(int i)
 354 #else
 355 int BIO_fd_should_retry(int i)
 356 #endif
 357         {
 358         int err;
 359
 360         if ((i == 0) || (i == -1))
 361                 {
 362 #ifndef BIO_FD
 363                 err=get_last_socket_error();
 364 #else
 365                 err=get_last_sys_error();
 366 #endif
 367
 368 #if defined(WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
 369                 if ((i == -1) && (err == 0))
 370                         return(1);
 371 #endif
 372
 373 #ifndef BIO_FD
 374                 return(BIO_sock_non_fatal_error(err));
 375 #else
 376                 return(BIO_fd_non_fatal_error(err));
 377 #endif
 378                 }
 379         return(0);
 380         }
 381
 382 #ifndef BIO_FD
 383 int BIO_sock_non_fatal_error(int err)
 384 #else
 385 int BIO_fd_non_fatal_error(int err)
 386 #endif
 387         {
 388         switch (err)
 389                 {
 390 #if !defined(BIO_FD) && defined(WINDOWS)
 391 # if defined(WSAEWOULDBLOCK)
 392         case WSAEWOULDBLOCK:
 393 # endif
 394
 395 # if 0 /* This appears to always be an error */
 396 #  if defined(WSAENOTCONN)
 397         case WSAENOTCONN:
 398 #  endif
 399 # endif
 400 #endif
 401
 402 #ifdef EWOULDBLOCK
 403 # ifdef WSAEWOULDBLOCK
 404 #  if WSAEWOULDBLOCK != EWOULDBLOCK
 405         case EWOULDBLOCK:
 406 #  endif
 407 # else
 408         case EWOULDBLOCK:
 409 # endif
 410 #endif
 411
 412 #if defined(ENOTCONN)
 413         case ENOTCONN:
 414 #endif
 415
 416 #ifdef EINTR
 417         case EINTR:
 418 #endif
 419
 420 #ifdef EAGAIN
 421 #if EWOULDBLOCK != EAGAIN
 422         case EAGAIN:
 423 # endif
 424 #endif
 425
 426 #ifdef EPROTO
 427         case EPROTO:
 428 #endif
 429
 430 #ifdef EINPROGRESS
 431         case EINPROGRESS:
 432 #endif
 433
 434 #ifdef EALREADY
 435         case EALREADY:
 436 #endif
 437                 return(1);
 438                 /* break; */
 439         default:
 440                 break;
 441                 }
 442         return(0);
 443         }
 444 #endif