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 "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()
 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()
 139         {
 140         return(&methods_fdp);
 141         }
 142 #endif
 143
 144 #ifndef BIO_FD
 145 BIO *BIO_new_socket(fd,close_flag)
 146 #else
 147 BIO *BIO_new_fd(fd,close_flag)
 148 #endif
 149 int fd;
 150 int close_flag;
 151         {
 152         BIO *ret;
 153
 154 #ifndef BIO_FD
 155         ret=BIO_new(BIO_s_socket());
 156 #else
 157         ret=BIO_new(BIO_s_fd());
 158 #endif
 159         if (ret == NULL) return(NULL);
 160         BIO_set_fd(ret,fd,close_flag);
 161         return(ret);
 162         }
 163
 164 #ifndef BIO_FD
 165 static int sock_new(bi)
 166 #else
 167 static int fd_new(bi)
 168 #endif
 169 BIO *bi;
 170         {
 171         bi->init=0;
 172         bi->num=0;
 173         bi->ptr=NULL;
 174         bi->flags=0;
 175         return(1);
 176         }
 177
 178 #ifndef BIO_FD
 179 static int sock_free(a)
 180 #else
 181 static int fd_free(a)
 182 #endif
 183 BIO *a;
 184         {
 185         if (a == NULL) return(0);
 186         if (a->shutdown)
 187                 {
 188                 if (a->init)
 189                         {
 190 #ifndef BIO_FD
 191                         shutdown(a->num,2);
 192                         closesocket(a->num);
 193 #else                   /* BIO_FD */
 194                         close(a->num);
 195 #endif
 196
 197                         }
 198                 a->init=0;
 199                 a->flags=0;
 200                 }
 201         return(1);
 202         }
 203
 204 #ifndef BIO_FD
 205 static int sock_read(b,out,outl)
 206 #else
 207 static int fd_read(b,out,outl)
 208 #endif
 209 BIO *b;
 210 char *out;
 211 int outl;
 212         {
 213         int ret=0;
 214
 215         if (out != NULL)
 216                 {
 217 #ifndef BIO_FD
 218                 clear_socket_error();
 219                 ret=readsocket(b->num,out,outl);
 220 #else
 221                 clear_sys_error();
 222                 ret=read(b->num,out,outl);
 223 #endif
 224                 BIO_clear_retry_flags(b);
 225                 if (ret <= 0)
 226                         {
 227 #ifndef BIO_FD
 228                         if (BIO_sock_should_retry(ret))
 229 #else
 230                         if (BIO_fd_should_retry(ret))
 231 #endif
 232                                 BIO_set_retry_read(b);
 233                         }
 234                 }
 235         return(ret);
 236         }
 237
 238 #ifndef BIO_FD
 239 static int sock_write(b,in,inl)
 240 #else
 241 static int fd_write(b,in,inl)
 242 #endif
 243 BIO *b;
 244 char *in;
 245 int inl;
 246         {
 247         int ret;
 248
 249 #ifndef BIO_FD
 250         clear_socket_error();
 251         ret=writesocket(b->num,in,inl);
 252 #else
 253         clear_sys_error();
 254         ret=write(b->num,in,inl);
 255 #endif
 256         BIO_clear_retry_flags(b);
 257         if (ret <= 0)
 258                 {
 259 #ifndef BIO_FD
 260                 if (BIO_sock_should_retry(ret))
 261 #else
 262                 if (BIO_fd_should_retry(ret))
 263 #endif
 264                         BIO_set_retry_write(b);
 265                 }
 266         return(ret);
 267         }
 268
 269 #ifndef BIO_FD
 270 static long sock_ctrl(b,cmd,num,ptr)
 271 #else
 272 static long fd_ctrl(b,cmd,num,ptr)
 273 #endif
 274 BIO *b;
 275 int cmd;
 276 long num;
 277 char *ptr;
 278         {
 279         long ret=1;
 280         int *ip;
 281
 282         switch (cmd)
 283                 {
 284         case BIO_CTRL_RESET:
 285                 num=0;
 286         case BIO_C_FILE_SEEK:
 287 #ifdef BIO_FD
 288                 ret=(long)lseek(b->num,num,0);
 289 #else
 290                 ret=0;
 291 #endif
 292                 break;
 293         case BIO_C_FILE_TELL:
 294         case BIO_CTRL_INFO:
 295 #ifdef BIO_FD
 296                 ret=(long)lseek(b->num,0,1);
 297 #else
 298                 ret=0;
 299 #endif
 300                 break;
 301         case BIO_C_SET_FD:
 302 #ifndef BIO_FD
 303                 sock_free(b);
 304 #else
 305                 fd_free(b);
 306 #endif
 307                 b->num= *((int *)ptr);
 308                 b->shutdown=(int)num;
 309                 b->init=1;
 310                 break;
 311         case BIO_C_GET_FD:
 312                 if (b->init)
 313                         {
 314                         ip=(int *)ptr;
 315                         if (ip != NULL) *ip=b->num;
 316                         ret=b->num;
 317                         }
 318                 else
 319                         ret= -1;
 320                 break;
 321         case BIO_CTRL_GET_CLOSE:
 322                 ret=b->shutdown;
 323                 break;
 324         case BIO_CTRL_SET_CLOSE:
 325                 b->shutdown=(int)num;
 326                 break;
 327         case BIO_CTRL_PENDING:
 328         case BIO_CTRL_WPENDING:
 329                 ret=0;
 330                 break;
 331         case BIO_CTRL_DUP:
 332         case BIO_CTRL_FLUSH:
 333                 ret=1;
 334                 break;
 335         default:
 336                 ret=0;
 337                 break;
 338                 }
 339         return(ret);
 340         }
 341
 342 #ifdef undef
 343 static int sock_gets(bp,buf,size)
 344 BIO *bp;
 345 char *buf;
 346 int size;
 347         {
 348         return(-1);
 349         }
 350 #endif
 351
 352 #ifndef BIO_FD
 353 static int sock_puts(bp,str)
 354 #else
 355 static int fd_puts(bp,str)
 356 #endif
 357 BIO *bp;
 358 char *str;
 359         {
 360         int n,ret;
 361
 362         n=strlen(str);
 363 #ifndef BIO_FD
 364         ret=sock_write(bp,str,n);
 365 #else
 366         ret=fd_write(bp,str,n);
 367 #endif
 368         return(ret);
 369         }
 370
 371 #ifndef BIO_FD
 372 int BIO_sock_should_retry(i)
 373 #else
 374 int BIO_fd_should_retry(i)
 375 #endif
 376 int i;
 377         {
 378         int err;
 379
 380         if ((i == 0) || (i == -1))
 381                 {
 382 #ifndef BIO_FD
 383                 err=get_last_socket_error();
 384 #else
 385                 err=get_last_sys_error();
 386 #endif
 387
 388 #if defined(WINDOWS) /* more microsoft stupidity */
 389                 if ((i == -1) && (err == 0))
 390                         return(1);
 391 #endif
 392
 393 #ifndef BIO_FD
 394                 return(BIO_sock_non_fatal_error(err));
 395 #else
 396                 return(BIO_fd_non_fatal_error(err));
 397 #endif
 398                 }
 399         return(0);
 400         }
 401
 402 #ifndef BIO_FD
 403 int BIO_sock_non_fatal_error(err)
 404 #else
 405 int BIO_fd_non_fatal_error(err)
 406 #endif
 407 int err;
 408         {
 409         switch (err)
 410                 {
 411 #if !defined(BIO_FD) && defined(WINDOWS)
 412 # if defined(WSAEWOULDBLOCK)
 413         case WSAEWOULDBLOCK:
 414 # endif
 415
 416 # if 0 /* This appears to always be an error */
 417 #  if defined(WSAENOTCONN)
 418         case WSAENOTCONN:
 419 #  endif
 420 # endif
 421 #endif
 422
 423 #ifdef EWOULDBLOCK
 424 # ifdef WSAEWOULDBLOCK
 425 #  if WSAEWOULDBLOCK != EWOULDBLOCK
 426         case EWOULDBLOCK:
 427 #  endif
 428 # else
 429         case EWOULDBLOCK:
 430 # endif
 431 #endif
 432
 433 #if defined(ENOTCONN)
 434         case ENOTCONN:
 435 #endif
 436
 437 #ifdef EINTR
 438         case EINTR:
 439 #endif
 440
 441 #ifdef EAGAIN
 442 #if EWOULDBLOCK != EAGAIN
 443         case EAGAIN:
 444 # endif
 445 #endif
 446
 447 #ifdef EPROTO
 448         case EPROTO:
 449 #endif
 450
 451 #ifdef EINPROGRESS
 452         case EINPROGRESS:
 453 #endif
 454
 455 #ifdef EALREADY
 456         case EALREADY:
 457 #endif
 458                 return(1);
 459                 /* break; */
 460         default:
 461                 break;
 462                 }
 463         return(0);
 464         }
 465 #endif