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 64 #ifndef OPENSSL_NO_SOCK 65 66 # include <openssl/bio.h> 67 68 # ifdef WATT32 69 # define sock_write SockWrite /* Watt-32 uses same names */ 70 # define sock_read SockRead 71 # define sock_puts SockPuts 72 # endif 73 74 static int sock_write(BIO *h, const char *buf, int num); 75 static int sock_read(BIO *h, char *buf, int size); 76 static int sock_puts(BIO *h, const char *str); 77 static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2); 78 static int sock_new(BIO *h); 79 static int sock_free(BIO *data); 80 int BIO_sock_should_retry(int s); 81 82 static BIO_METHOD methods_sockp = { 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) 106 return (NULL); 107 BIO_set_fd(ret, fd, close_flag); 108 return (ret); 109 } 110 111 static int sock_new(BIO *bi) 112 { 113 bi->init = 0; 114 bi->num = 0; 115 bi->ptr = NULL; 116 bi->flags = 0; 117 return (1); 118 } 119 120 static int sock_free(BIO *a) 121 { 122 if (a == NULL) 123 return (0); 124 if (a->shutdown) { 125 if (a->init) { 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 clear_socket_error(); 140 ret = readsocket(b->num, out, outl); 141 BIO_clear_retry_flags(b); 142 if (ret <= 0) { 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 if (BIO_sock_should_retry(ret)) 159 BIO_set_retry_write(b); 160 } 161 return (ret); 162 } 163 164 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) 165 { 166 long ret = 1; 167 int *ip; 168 169 switch (cmd) { 170 case BIO_C_SET_FD: 171 sock_free(b); 172 b->num = *((int *)ptr); 173 b->shutdown = (int)num; 174 b->init = 1; 175 break; 176 case BIO_C_GET_FD: 177 if (b->init) { 178 ip = (int *)ptr; 179 if (ip != NULL) 180 *ip = b->num; 181 ret = b->num; 182 } else 183 ret = -1; 184 break; 185 case BIO_CTRL_GET_CLOSE: 186 ret = b->shutdown; 187 break; 188 case BIO_CTRL_SET_CLOSE: 189 b->shutdown = (int)num; 190 break; 191 case BIO_CTRL_DUP: 192 case BIO_CTRL_FLUSH: 193 ret = 1; 194 break; 195 default: 196 ret = 0; 197 break; 198 } 199 return (ret); 200 } 201 202 static int sock_puts(BIO *bp, const char *str) 203 { 204 int n, ret; 205 206 n = strlen(str); 207 ret = sock_write(bp, str, n); 208 return (ret); 209 } 210 211 int BIO_sock_should_retry(int i) 212 { 213 int err; 214 215 if ((i == 0) || (i == -1)) { 216 err = get_last_socket_error(); 217 218 # if defined(OPENSSL_SYS_WINDOWS) && 0/* more microsoft stupidity? perhaps 219 * not? Ben 4/1/99 */ 220 if ((i == -1) && (err == 0)) 221 return (1); 222 # endif 223 224 return (BIO_sock_non_fatal_error(err)); 225 } 226 return (0); 227 } 228 229 int BIO_sock_non_fatal_error(int err) 230 { 231 switch (err) { 232 # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE) 233 # if defined(WSAEWOULDBLOCK) 234 case WSAEWOULDBLOCK: 235 # endif 236 237 # if 0 /* This appears to always be an error */ 238 # if defined(WSAENOTCONN) 239 case WSAENOTCONN: 240 # endif 241 # endif 242 # endif 243 244 # ifdef EWOULDBLOCK 245 # ifdef WSAEWOULDBLOCK 246 # if WSAEWOULDBLOCK != EWOULDBLOCK 247 case EWOULDBLOCK: 248 # endif 249 # else 250 case EWOULDBLOCK: 251 # endif 252 # endif 253 254 # if defined(ENOTCONN) 255 case ENOTCONN: 256 # endif 257 258 # ifdef EINTR 259 case EINTR: 260 # endif 261 262 # ifdef EAGAIN 263 # if EWOULDBLOCK != EAGAIN 264 case EAGAIN: 265 # endif 266 # endif 267 268 # ifdef EPROTO 269 case EPROTO: 270 # endif 271 272 # ifdef EINPROGRESS 273 case EINPROGRESS: 274 # endif 275 276 # ifdef EALREADY 277 case EALREADY: 278 # endif 279 return (1); 280 /* break; */ 281 default: 282 break; 283 } 284 return (0); 285 } 286 287 #endif /* #ifndef OPENSSL_NO_SOCK */ 288