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 { 84 BIO_TYPE_SOCKET, 85 "socket", 86 sock_write, 87 sock_read, 88 sock_puts, 89 NULL, /* sock_gets, */ 90 sock_ctrl, 91 sock_new, 92 sock_free, 93 NULL, 94 }; 95 96 BIO_METHOD *BIO_s_socket(void) 97 { 98 return(&methods_sockp); 99 } 100 101 BIO *BIO_new_socket(int fd, int close_flag) 102 { 103 BIO *ret; 104 105 ret=BIO_new(BIO_s_socket()); 106 if (ret == NULL) 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) return(0); 123 if (a->shutdown) 124 { 125 if (a->init) 126 { 127 SHUTDOWN2(a->num); 128 } 129 a->init=0; 130 a->flags=0; 131 } 132 return(1); 133 } 134 135 static int sock_read(BIO *b, char *out, int outl) 136 { 137 int ret=0; 138 139 if (out != NULL) 140 { 141 clear_socket_error(); 142 ret=readsocket(b->num,out,outl); 143 BIO_clear_retry_flags(b); 144 if (ret <= 0) 145 { 146 if (BIO_sock_should_retry(ret)) 147 BIO_set_retry_read(b); 148 } 149 } 150 return(ret); 151 } 152 153 static int sock_write(BIO *b, const char *in, int inl) 154 { 155 int ret; 156 157 clear_socket_error(); 158 ret=writesocket(b->num,in,inl); 159 BIO_clear_retry_flags(b); 160 if (ret <= 0) 161 { 162 if (BIO_sock_should_retry(ret)) 163 BIO_set_retry_write(b); 164 } 165 return(ret); 166 } 167 168 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) 169 { 170 long ret=1; 171 int *ip; 172 173 switch (cmd) 174 { 175 case BIO_CTRL_RESET: 176 num=0; 177 case BIO_C_FILE_SEEK: 178 ret=0; 179 break; 180 case BIO_C_FILE_TELL: 181 case BIO_CTRL_INFO: 182 ret=0; 183 break; 184 case BIO_C_SET_FD: 185 sock_free(b); 186 b->num= *((int *)ptr); 187 b->shutdown=(int)num; 188 b->init=1; 189 break; 190 case BIO_C_GET_FD: 191 if (b->init) 192 { 193 ip=(int *)ptr; 194 if (ip != NULL) *ip=b->num; 195 ret=b->num; 196 } 197 else 198 ret= -1; 199 break; 200 case BIO_CTRL_GET_CLOSE: 201 ret=b->shutdown; 202 break; 203 case BIO_CTRL_SET_CLOSE: 204 b->shutdown=(int)num; 205 break; 206 case BIO_CTRL_PENDING: 207 case BIO_CTRL_WPENDING: 208 ret=0; 209 break; 210 case BIO_CTRL_DUP: 211 case BIO_CTRL_FLUSH: 212 ret=1; 213 break; 214 default: 215 ret=0; 216 break; 217 } 218 return(ret); 219 } 220 221 static int sock_puts(BIO *bp, const char *str) 222 { 223 int n,ret; 224 225 n=strlen(str); 226 ret=sock_write(bp,str,n); 227 return(ret); 228 } 229 230 int BIO_sock_should_retry(int i) 231 { 232 int err; 233 234 if ((i == 0) || (i == -1)) 235 { 236 err=get_last_socket_error(); 237 238 #if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */ 239 if ((i == -1) && (err == 0)) 240 return(1); 241 #endif 242 243 return(BIO_sock_non_fatal_error(err)); 244 } 245 return(0); 246 } 247 248 int BIO_sock_non_fatal_error(int err) 249 { 250 switch (err) 251 { 252 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE) 253 # if defined(WSAEWOULDBLOCK) 254 case WSAEWOULDBLOCK: 255 # endif 256 257 # if 0 /* This appears to always be an error */ 258 # if defined(WSAENOTCONN) 259 case WSAENOTCONN: 260 # endif 261 # endif 262 #endif 263 264 #ifdef EWOULDBLOCK 265 # ifdef WSAEWOULDBLOCK 266 # if WSAEWOULDBLOCK != EWOULDBLOCK 267 case EWOULDBLOCK: 268 # endif 269 # else 270 case EWOULDBLOCK: 271 # endif 272 #endif 273 274 #if defined(ENOTCONN) 275 case ENOTCONN: 276 #endif 277 278 #ifdef EINTR 279 case EINTR: 280 #endif 281 282 #ifdef EAGAIN 283 # if EWOULDBLOCK != EAGAIN 284 case EAGAIN: 285 # endif 286 #endif 287 288 #ifdef EPROTO 289 case EPROTO: 290 #endif 291 292 #ifdef EINPROGRESS 293 case EINPROGRESS: 294 #endif 295 296 #ifdef EALREADY 297 case EALREADY: 298 #endif 299 return(1); 300 /* break; */ 301 default: 302 break; 303 } 304 return(0); 305 } 306 307 #endif /* #ifndef OPENSSL_NO_SOCK */ 308