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