crypto/bio/bss_sock.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include <errno.h>
  60 #define USE_SOCKETS
  61 #include "internal/cryptlib.h"
  62
  63 #ifndef OPENSSL_NO_SOCK
  64
  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     BIO_TYPE_SOCKET,
  83     "socket",
  84     sock_write,
  85     sock_read,
  86     sock_puts,
  87     NULL,                       /* sock_gets, */
  88     sock_ctrl,
  89     sock_new,
  90     sock_free,
  91     NULL,
  92 };
  93
  94 BIO_METHOD *BIO_s_socket(void)
  95 {
  96     return (&methods_sockp);
  97 }
  98
  99 BIO *BIO_new_socket(int fd, int close_flag)
 100 {
 101     BIO *ret;
 102
 103     ret = BIO_new(BIO_s_socket());
 104     if (ret == NULL)
 105         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)
 122         return (0);
 123     if (a->shutdown) {
 124         if (a->init) {
 125             BIO_closesocket(a->num);
 126         }
 127         a->init = 0;
 128         a->flags = 0;
 129     }
 130     return (1);
 131 }
 132
 133 static int sock_read(BIO *b, char *out, int outl)
 134 {
 135     int ret = 0;
 136
 137     if (out != NULL) {
 138         clear_socket_error();
 139         ret = readsocket(b->num, out, outl);
 140         BIO_clear_retry_flags(b);
 141         if (ret <= 0) {
 142             if (BIO_sock_should_retry(ret))
 143                 BIO_set_retry_read(b);
 144         }
 145     }
 146     return (ret);
 147 }
 148
 149 static int sock_write(BIO *b, const char *in, int inl)
 150 {
 151     int ret;
 152
 153     clear_socket_error();
 154     ret = writesocket(b->num, in, inl);
 155     BIO_clear_retry_flags(b);
 156     if (ret <= 0) {
 157         if (BIO_sock_should_retry(ret))
 158             BIO_set_retry_write(b);
 159     }
 160     return (ret);
 161 }
 162
 163 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
 164 {
 165     long ret = 1;
 166     int *ip;
 167
 168     switch (cmd) {
 169     case BIO_C_SET_FD:
 170         sock_free(b);
 171         b->num = *((int *)ptr);
 172         b->shutdown = (int)num;
 173         b->init = 1;
 174         break;
 175     case BIO_C_GET_FD:
 176         if (b->init) {
 177             ip = (int *)ptr;
 178             if (ip != NULL)
 179                 *ip = b->num;
 180             ret = b->num;
 181         } else
 182             ret = -1;
 183         break;
 184     case BIO_CTRL_GET_CLOSE:
 185         ret = b->shutdown;
 186         break;
 187     case BIO_CTRL_SET_CLOSE:
 188         b->shutdown = (int)num;
 189         break;
 190     case BIO_CTRL_DUP:
 191     case BIO_CTRL_FLUSH:
 192         ret = 1;
 193         break;
 194     default:
 195         ret = 0;
 196         break;
 197     }
 198     return (ret);
 199 }
 200
 201 static int sock_puts(BIO *bp, const char *str)
 202 {
 203     int n, ret;
 204
 205     n = strlen(str);
 206     ret = sock_write(bp, str, n);
 207     return (ret);
 208 }
 209
 210 int BIO_sock_should_retry(int i)
 211 {
 212     int err;
 213
 214     if ((i == 0) || (i == -1)) {
 215         err = get_last_socket_error();
 216
 217 # if defined(OPENSSL_SYS_WINDOWS) && 0/* more microsoft stupidity? perhaps
 218                                        * not? Ben 4/1/99 */
 219         if ((i == -1) && (err == 0))
 220             return (1);
 221 # endif
 222
 223         return (BIO_sock_non_fatal_error(err));
 224     }
 225     return (0);
 226 }
 227
 228 int BIO_sock_non_fatal_error(int err)
 229 {
 230     switch (err) {
 231 # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
 232 #  if defined(WSAEWOULDBLOCK)
 233     case WSAEWOULDBLOCK:
 234 #  endif
 235 # endif
 236
 237 # ifdef EWOULDBLOCK
 238 #  ifdef WSAEWOULDBLOCK
 239 #   if WSAEWOULDBLOCK != EWOULDBLOCK
 240     case EWOULDBLOCK:
 241 #   endif
 242 #  else
 243     case EWOULDBLOCK:
 244 #  endif
 245 # endif
 246
 247 # if defined(ENOTCONN)
 248     case ENOTCONN:
 249 # endif
 250
 251 # ifdef EINTR
 252     case EINTR:
 253 # endif
 254
 255 # ifdef EAGAIN
 256 #  if EWOULDBLOCK != EAGAIN
 257     case EAGAIN:
 258 #  endif
 259 # endif
 260
 261 # ifdef EPROTO
 262     case EPROTO:
 263 # endif
 264
 265 # ifdef EINPROGRESS
 266     case EINPROGRESS:
 267 # endif
 268
 269 # ifdef EALREADY
 270     case EALREADY:
 271 # endif
 272         return (1);
 273         /* break; */
 274     default:
 275         break;
 276     }
 277     return (0);
 278 }
 279
 280 #endif                          /* #ifndef OPENSSL_NO_SOCK */