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 #ifndef OPENSSL_NO_SOCK
  60
  61 #include <stdio.h>
  62 #include <errno.h>
  63 #define USE_SOCKETS
  64 #include "cryptlib.h"
  65 #include <openssl/bio.h>
  66
  67 #ifdef WATT32
  68 #define sock_write SockWrite  /* Watt-32 uses same names */
  69 #define sock_read  SockRead
  70 #define sock_puts  SockPuts
  71 #endif
  72
  73 static int sock_write(BIO *h, const char *buf, int num);
  74 static int sock_read(BIO *h, char *buf, int size);
  75 static int sock_puts(BIO *h, const char *str);
  76 static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
  77 static int sock_new(BIO *h);
  78 static int sock_free(BIO *data);
  79 int BIO_sock_should_retry(int s);
  80
  81 static BIO_METHOD methods_sockp=
  82         {
  83         BIO_TYPE_SOCKET,
  84         "socket",
  85         sock_write,
  86         sock_read,
  87         sock_puts,
  88         NULL, /* sock_gets, */
  89         sock_ctrl,
  90         sock_new,
  91         sock_free,
  92         NULL,
  93         };
  94
  95 BIO_METHOD *BIO_s_socket(void)
  96         {
  97         return(&methods_sockp);
  98         }
  99
 100 BIO *BIO_new_socket(int fd, int close_flag)
 101         {
 102         BIO *ret;
 103
 104         ret=BIO_new(BIO_s_socket());
 105         if (ret == NULL) return(NULL);
 106         BIO_set_fd(ret,fd,close_flag);
 107         return(ret);
 108         }
 109
 110 static int sock_new(BIO *bi)
 111         {
 112         bi->init=0;
 113         bi->num=0;
 114         bi->ptr=NULL;
 115         bi->flags=0;
 116         return(1);
 117         }
 118
 119 static int sock_free(BIO *a)
 120         {
 121         if (a == NULL) return(0);
 122         if (a->shutdown)
 123                 {
 124                 if (a->init)
 125                         {
 126                         SHUTDOWN2(a->num);
 127                         }
 128                 a->init=0;
 129                 a->flags=0;
 130                 }
 131         return(1);
 132         }
 133
 134 static int sock_read(BIO *b, char *out, int outl)
 135         {
 136         int ret=0;
 137
 138         if (out != NULL)
 139                 {
 140                 clear_socket_error();
 141                 ret=readsocket(b->num,out,outl);
 142                 BIO_clear_retry_flags(b);
 143                 if (ret <= 0)
 144                         {
 145                         if (BIO_sock_should_retry(ret))
 146                                 BIO_set_retry_read(b);
 147                         }
 148                 }
 149         return(ret);
 150         }
 151
 152 static int sock_write(BIO *b, const char *in, int inl)
 153         {
 154         int ret;
 155
 156         clear_socket_error();
 157         ret=writesocket(b->num,in,inl);
 158         BIO_clear_retry_flags(b);
 159         if (ret <= 0)
 160                 {
 161                 if (BIO_sock_should_retry(ret))
 162                         BIO_set_retry_write(b);
 163                 }
 164         return(ret);
 165         }
 166
 167 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
 168         {
 169         long ret=1;
 170         int *ip;
 171
 172         switch (cmd)
 173                 {
 174         case BIO_CTRL_RESET:
 175                 num=0;
 176         case BIO_C_FILE_SEEK:
 177                 ret=0;
 178                 break;
 179         case BIO_C_FILE_TELL:
 180         case BIO_CTRL_INFO:
 181                 ret=0;
 182                 break;
 183         case BIO_C_SET_FD:
 184                 sock_free(b);
 185                 b->num= *((int *)ptr);
 186                 b->shutdown=(int)num;
 187                 b->init=1;
 188                 break;
 189         case BIO_C_GET_FD:
 190                 if (b->init)
 191                         {
 192                         ip=(int *)ptr;
 193                         if (ip != NULL) *ip=b->num;
 194                         ret=b->num;
 195                         }
 196                 else
 197                         ret= -1;
 198                 break;
 199         case BIO_CTRL_GET_CLOSE:
 200                 ret=b->shutdown;
 201                 break;
 202         case BIO_CTRL_SET_CLOSE:
 203                 b->shutdown=(int)num;
 204                 break;
 205         case BIO_CTRL_PENDING:
 206         case BIO_CTRL_WPENDING:
 207                 ret=0;
 208                 break;
 209         case BIO_CTRL_DUP:
 210         case BIO_CTRL_FLUSH:
 211                 ret=1;
 212                 break;
 213         default:
 214                 ret=0;
 215                 break;
 216                 }
 217         return(ret);
 218         }
 219
 220 static int sock_puts(BIO *bp, const char *str)
 221         {
 222         int n,ret;
 223
 224         n=strlen(str);
 225         ret=sock_write(bp,str,n);
 226         return(ret);
 227         }
 228
 229 int BIO_sock_should_retry(int i)
 230         {
 231         int err;
 232
 233         if ((i == 0) || (i == -1))
 234                 {
 235                 err=get_last_socket_error();
 236
 237 #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
 238                 if ((i == -1) && (err == 0))
 239                         return(1);
 240 #endif
 241
 242                 return(BIO_sock_non_fatal_error(err));
 243                 }
 244         return(0);
 245         }
 246
 247 int BIO_sock_non_fatal_error(int err)
 248         {
 249         switch (err)
 250                 {
 251 #if defined(OPENSSL_SYS_WINDOWS)
 252 # if defined(WSAEWOULDBLOCK)
 253         case WSAEWOULDBLOCK:
 254 # endif
 255
 256 # if 0 /* This appears to always be an error */
 257 #  if defined(WSAENOTCONN)
 258         case WSAENOTCONN:
 259 #  endif
 260 # endif
 261 #endif
 262
 263 #ifdef EWOULDBLOCK
 264 # ifdef WSAEWOULDBLOCK
 265 #  if WSAEWOULDBLOCK != EWOULDBLOCK
 266         case EWOULDBLOCK:
 267 #  endif
 268 # else
 269         case EWOULDBLOCK:
 270 # endif
 271 #endif
 272
 273 #if defined(ENOTCONN)
 274         case ENOTCONN:
 275 #endif
 276
 277 #ifdef EINTR
 278         case EINTR:
 279 #endif
 280
 281 #ifdef EAGAIN
 282 #if EWOULDBLOCK != EAGAIN
 283         case EAGAIN:
 284 # endif
 285 #endif
 286
 287 #ifdef EPROTO
 288         case EPROTO:
 289 #endif
 290
 291 #ifdef EINPROGRESS
 292         case EINPROGRESS:
 293 #endif
 294
 295 #ifdef EALREADY
 296         case EALREADY:
 297 #endif
 298                 return(1);
 299                 /* break; */
 300         default:
 301                 break;
 302                 }
 303         return(0);
 304         }
 305 #endif