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 static int sock_write(BIO *h, const char *buf, int num);
  69 static int sock_read(BIO *h, char *buf, int size);
  70 static int sock_puts(BIO *h, const char *str);
  71 static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
  72 static int sock_new(BIO *h);
  73 static int sock_free(BIO *data);
  74 int BIO_sock_should_retry(int s);
  75 #else
  76
  77 static int fd_write(BIO *h, const char *buf, int num);
  78 static int fd_read(BIO *h, char *buf, int size);
  79 static int fd_puts(BIO *h, const char *str);
  80 static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2);
  81 static int fd_new(BIO *h);
  82 static int fd_free(BIO *data);
  83 int BIO_fd_should_retry(int s);
  84 #endif
  85
  86 #ifndef BIO_FD
  87 static BIO_METHOD methods_sockp=
  88         {
  89         BIO_TYPE_SOCKET,
  90         "socket",
  91         sock_write,
  92         sock_read,
  93         sock_puts,
  94         NULL, /* sock_gets, */
  95         sock_ctrl,
  96         sock_new,
  97         sock_free,
  98         NULL,
  99         };
 100
 101 BIO_METHOD *BIO_s_socket(void)
 102         {
 103         return(&methods_sockp);
 104         }
 105 #else
 106 static BIO_METHOD methods_fdp=
 107         {
 108         BIO_TYPE_FD,"file descriptor",
 109         fd_write,
 110         fd_read,
 111         fd_puts,
 112         NULL, /* fd_gets, */
 113         fd_ctrl,
 114         fd_new,
 115         fd_free,
 116         NULL,
 117         };
 118
 119 BIO_METHOD *BIO_s_fd(void)
 120         {
 121         return(&methods_fdp);
 122         }
 123 #endif
 124
 125 #ifndef BIO_FD
 126 BIO *BIO_new_socket(int fd, int close_flag)
 127 #else
 128 BIO *BIO_new_fd(int fd,int close_flag)
 129 #endif
 130         {
 131         BIO *ret;
 132
 133 #ifndef BIO_FD
 134         ret=BIO_new(BIO_s_socket());
 135 #else
 136         ret=BIO_new(BIO_s_fd());
 137 #endif
 138         if (ret == NULL) return(NULL);
 139         BIO_set_fd(ret,fd,close_flag);
 140         return(ret);
 141         }
 142
 143 #ifndef BIO_FD
 144 static int sock_new(BIO *bi)
 145 #else
 146 static int fd_new(BIO *bi)
 147 #endif
 148         {
 149         bi->init=0;
 150         bi->num=0;
 151         bi->ptr=NULL;
 152         bi->flags=0;
 153         return(1);
 154         }
 155
 156 #ifndef BIO_FD
 157 static int sock_free(BIO *a)
 158 #else
 159 static int fd_free(BIO *a)
 160 #endif
 161         {
 162         if (a == NULL) return(0);
 163         if (a->shutdown)
 164                 {
 165                 if (a->init)
 166                         {
 167 #ifndef BIO_FD
 168                         SHUTDOWN2(a->num);
 169 #else                   /* BIO_FD */
 170                         close(a->num);
 171 #endif
 172
 173                         }
 174                 a->init=0;
 175                 a->flags=0;
 176                 }
 177         return(1);
 178         }
 179
 180 #ifndef BIO_FD
 181 static int sock_read(BIO *b, char *out, int outl)
 182 #else
 183 static int fd_read(BIO *b, char *out,int outl)
 184 #endif
 185         {
 186         int ret=0;
 187
 188         if (out != NULL)
 189                 {
 190 #ifndef BIO_FD
 191                 clear_socket_error();
 192                 ret=readsocket(b->num,out,outl);
 193 #else
 194                 clear_sys_error();
 195                 ret=read(b->num,out,outl);
 196 #endif
 197                 BIO_clear_retry_flags(b);
 198                 if (ret <= 0)
 199                         {
 200 #ifndef BIO_FD
 201                         if (BIO_sock_should_retry(ret))
 202 #else
 203                         if (BIO_fd_should_retry(ret))
 204 #endif
 205                                 BIO_set_retry_read(b);
 206                         }
 207                 }
 208         return(ret);
 209         }
 210
 211 #ifndef BIO_FD
 212 static int sock_write(BIO *b, const char *in, int inl)
 213 #else
 214 static int fd_write(BIO *b, const char *in, int inl)
 215 #endif
 216         {
 217         int ret;
 218
 219 #ifndef BIO_FD
 220         clear_socket_error();
 221         ret=writesocket(b->num,in,inl);
 222 #else
 223         clear_sys_error();
 224         ret=write(b->num,in,inl);
 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_write(b);
 235                 }
 236         return(ret);
 237         }
 238
 239 #ifndef BIO_FD
 240 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
 241 #else
 242 static long fd_ctrl(BIO *b, int cmd, long num, void *ptr)
 243 #endif
 244         {
 245         long ret=1;
 246         int *ip;
 247
 248         switch (cmd)
 249                 {
 250         case BIO_CTRL_RESET:
 251                 num=0;
 252         case BIO_C_FILE_SEEK:
 253 #ifdef BIO_FD
 254                 ret=(long)lseek(b->num,num,0);
 255 #else
 256                 ret=0;
 257 #endif
 258                 break;
 259         case BIO_C_FILE_TELL:
 260         case BIO_CTRL_INFO:
 261 #ifdef BIO_FD
 262                 ret=(long)lseek(b->num,0,1);
 263 #else
 264                 ret=0;
 265 #endif
 266                 break;
 267         case BIO_C_SET_FD:
 268 #ifndef BIO_FD
 269                 sock_free(b);
 270 #else
 271                 fd_free(b);
 272 #endif
 273                 b->num= *((int *)ptr);
 274                 b->shutdown=(int)num;
 275                 b->init=1;
 276                 break;
 277         case BIO_C_GET_FD:
 278                 if (b->init)
 279                         {
 280                         ip=(int *)ptr;
 281                         if (ip != NULL) *ip=b->num;
 282                         ret=b->num;
 283                         }
 284                 else
 285                         ret= -1;
 286                 break;
 287         case BIO_CTRL_GET_CLOSE:
 288                 ret=b->shutdown;
 289                 break;
 290         case BIO_CTRL_SET_CLOSE:
 291                 b->shutdown=(int)num;
 292                 break;
 293         case BIO_CTRL_PENDING:
 294         case BIO_CTRL_WPENDING:
 295                 ret=0;
 296                 break;
 297         case BIO_CTRL_DUP:
 298         case BIO_CTRL_FLUSH:
 299                 ret=1;
 300                 break;
 301         default:
 302                 ret=0;
 303                 break;
 304                 }
 305         return(ret);
 306         }
 307
 308 #ifdef undef
 309 static int sock_gets(BIO *bp, char *buf,int size)
 310         {
 311         return(-1);
 312         }
 313 #endif
 314
 315 #ifndef BIO_FD
 316 static int sock_puts(BIO *bp, const char *str)
 317 #else
 318 static int fd_puts(BIO *bp, const char *str)
 319 #endif
 320         {
 321         int n,ret;
 322
 323         n=strlen(str);
 324 #ifndef BIO_FD
 325         ret=sock_write(bp,str,n);
 326 #else
 327         ret=fd_write(bp,str,n);
 328 #endif
 329         return(ret);
 330         }
 331
 332 #ifndef BIO_FD
 333 int BIO_sock_should_retry(int i)
 334 #else
 335 int BIO_fd_should_retry(int i)
 336 #endif
 337         {
 338         int err;
 339
 340         if ((i == 0) || (i == -1))
 341                 {
 342 #ifndef BIO_FD
 343                 err=get_last_socket_error();
 344 #else
 345                 err=get_last_sys_error();
 346 #endif
 347
 348 #if defined(WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
 349                 if ((i == -1) && (err == 0))
 350                         return(1);
 351 #endif
 352
 353 #ifndef BIO_FD
 354                 return(BIO_sock_non_fatal_error(err));
 355 #else
 356                 return(BIO_fd_non_fatal_error(err));
 357 #endif
 358                 }
 359         return(0);
 360         }
 361
 362 #ifndef BIO_FD
 363 int BIO_sock_non_fatal_error(int err)
 364 #else
 365 int BIO_fd_non_fatal_error(int err)
 366 #endif
 367         {
 368         switch (err)
 369                 {
 370 #if !defined(BIO_FD) && defined(WINDOWS)
 371 # if defined(WSAEWOULDBLOCK)
 372         case WSAEWOULDBLOCK:
 373 # endif
 374
 375 # if 0 /* This appears to always be an error */
 376 #  if defined(WSAENOTCONN)
 377         case WSAENOTCONN:
 378 #  endif
 379 # endif
 380 #endif
 381
 382 #ifdef EWOULDBLOCK
 383 # ifdef WSAEWOULDBLOCK
 384 #  if WSAEWOULDBLOCK != EWOULDBLOCK
 385         case EWOULDBLOCK:
 386 #  endif
 387 # else
 388         case EWOULDBLOCK:
 389 # endif
 390 #endif
 391
 392 #if defined(ENOTCONN)
 393         case ENOTCONN:
 394 #endif
 395
 396 #ifdef EINTR
 397         case EINTR:
 398 #endif
 399
 400 #ifdef EAGAIN
 401 #if EWOULDBLOCK != EAGAIN
 402         case EAGAIN:
 403 # endif
 404 #endif
 405
 406 #ifdef EPROTO
 407         case EPROTO:
 408 #endif
 409
 410 #ifdef EINPROGRESS
 411         case EINPROGRESS:
 412 #endif
 413
 414 #ifdef EALREADY
 415         case EALREADY:
 416 #endif
 417                 return(1);
 418                 /* break; */
 419         default:
 420                 break;
 421                 }
 422         return(0);
 423         }
 424 #endif