crypto/openssl-0.9/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 #include <stdio.h>
  60 #include <errno.h>
  61 #define USE_SOCKETS
  62 #include "cryptlib.h"
  63 #include <openssl/bio.h>
  64
  65 #ifdef WATT32
  66 #define sock_write SockWrite  /* Watt-32 uses same names */
  67 #define sock_read  SockRead
  68 #define sock_puts  SockPuts
  69 #endif
  70
  71 static int sock_write(BIO *h, const char *buf, int num);
  72 static int sock_read(BIO *h, char *buf, int size);
  73 static int sock_puts(BIO *h, const char *str);
  74 static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2);
  75 static int sock_new(BIO *h);
  76 static int sock_free(BIO *data);
  77 int BIO_sock_should_retry(int s);
  78
  79 static BIO_METHOD methods_sockp=
  80         {
  81         BIO_TYPE_SOCKET,
  82         "socket",
  83         sock_write,
  84         sock_read,
  85         sock_puts,
  86         NULL, /* sock_gets, */
  87         sock_ctrl,
  88         sock_new,
  89         sock_free,
  90         NULL,
  91         };
  92
  93 BIO_METHOD *BIO_s_socket(void)
  94         {
  95         return(&methods_sockp);
  96         }
  97
  98 BIO *BIO_new_socket(int fd, int close_flag)
  99         {
 100         BIO *ret;
 101
 102         ret=BIO_new(BIO_s_socket());
 103         if (ret == NULL) return(NULL);
 104         BIO_set_fd(ret,fd,close_flag);
 105         return(ret);
 106         }
 107
 108 static int sock_new(BIO *bi)
 109         {
 110         bi->init=0;
 111         bi->num=0;
 112         bi->ptr=NULL;
 113         bi->flags=0;
 114         return(1);
 115         }
 116
 117 static int sock_free(BIO *a)
 118         {
 119         if (a == NULL) return(0);
 120         if (a->shutdown)
 121                 {
 122                 if (a->init)
 123                         {
 124                         SHUTDOWN2(a->num);
 125                         }
 126                 a->init=0;
 127                 a->flags=0;
 128                 }
 129         return(1);
 130         }
 131
 132 static int sock_read(BIO *b, char *out, int outl)
 133         {
 134         int ret=0;
 135
 136         if (out != NULL)
 137                 {
 138                 clear_socket_error();
 139                 ret=readsocket(b->num,out,outl);
 140                 BIO_clear_retry_flags(b);
 141                 if (ret <= 0)
 142                         {
 143                         if (BIO_sock_should_retry(ret))
 144                                 BIO_set_retry_read(b);
 145                         }
 146                 }
 147         return(ret);
 148         }
 149
 150 static int sock_write(BIO *b, const char *in, int inl)
 151         {
 152         int ret;
 153
 154         clear_socket_error();
 155         ret=writesocket(b->num,in,inl);
 156         BIO_clear_retry_flags(b);
 157         if (ret <= 0)
 158                 {
 159                 if (BIO_sock_should_retry(ret))
 160                         BIO_set_retry_write(b);
 161                 }
 162         return(ret);
 163         }
 164
 165 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
 166         {
 167         long ret=1;
 168         int *ip;
 169
 170         switch (cmd)
 171                 {
 172         case BIO_CTRL_RESET:
 173                 num=0;
 174         case BIO_C_FILE_SEEK:
 175                 ret=0;
 176                 break;
 177         case BIO_C_FILE_TELL:
 178         case BIO_CTRL_INFO:
 179                 ret=0;
 180                 break;
 181         case BIO_C_SET_FD:
 182                 sock_free(b);
 183                 b->num= *((int *)ptr);
 184                 b->shutdown=(int)num;
 185                 b->init=1;
 186                 break;
 187         case BIO_C_GET_FD:
 188                 if (b->init)
 189                         {
 190                         ip=(int *)ptr;
 191                         if (ip != NULL) *ip=b->num;
 192                         ret=b->num;
 193                         }
 194                 else
 195                         ret= -1;
 196                 break;
 197         case BIO_CTRL_GET_CLOSE:
 198                 ret=b->shutdown;
 199                 break;
 200         case BIO_CTRL_SET_CLOSE:
 201                 b->shutdown=(int)num;
 202                 break;
 203         case BIO_CTRL_PENDING:
 204         case BIO_CTRL_WPENDING:
 205                 ret=0;
 206                 break;
 207         case BIO_CTRL_DUP:
 208         case BIO_CTRL_FLUSH:
 209                 ret=1;
 210                 break;
 211         default:
 212                 ret=0;
 213                 break;
 214                 }
 215         return(ret);
 216         }
 217
 218 static int sock_puts(BIO *bp, const char *str)
 219         {
 220         int n,ret;
 221
 222         n=strlen(str);
 223         ret=sock_write(bp,str,n);
 224         return(ret);
 225         }
 226
 227 int BIO_sock_should_retry(int i)
 228         {
 229         int err;
 230
 231         if ((i == 0) || (i == -1))
 232                 {
 233                 err=get_last_socket_error();
 234
 235 #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */
 236                 if ((i == -1) && (err == 0))
 237                         return(1);
 238 #endif
 239
 240                 return(BIO_sock_non_fatal_error(err));
 241                 }
 242         return(0);
 243         }
 244
 245 int BIO_sock_non_fatal_error(int err)
 246         {
 247         switch (err)
 248                 {
 249 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
 250 # if defined(WSAEWOULDBLOCK)
 251         case WSAEWOULDBLOCK:
 252 # endif
 253
 254 # if 0 /* This appears to always be an error */
 255 #  if defined(WSAENOTCONN)
 256         case WSAENOTCONN:
 257 #  endif
 258 # endif
 259 #endif
 260
 261 #ifdef EWOULDBLOCK
 262 # ifdef WSAEWOULDBLOCK
 263 #  if WSAEWOULDBLOCK != EWOULDBLOCK
 264         case EWOULDBLOCK:
 265 #  endif
 266 # else
 267         case EWOULDBLOCK:
 268 # endif
 269 #endif
 270
 271 #if defined(ENOTCONN)
 272         case ENOTCONN:
 273 #endif
 274
 275 #ifdef EINTR
 276         case EINTR:
 277 #endif
 278
 279 #ifdef EAGAIN
 280 # if EWOULDBLOCK != EAGAIN
 281         case EAGAIN:
 282 # endif
 283 #endif
 284
 285 #ifdef EPROTO
 286         case EPROTO:
 287 #endif
 288
 289 #ifdef EINPROGRESS
 290         case EINPROGRESS:
 291 #endif
 292
 293 #ifdef EALREADY
 294         case EALREADY:
 295 #endif
 296                 return(1);
 297                 /* break; */
 298         default:
 299                 break;
 300                 }
 301         return(0);
 302         }