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 #if !defined(NO_SOCK) || defined(BIO_FD) 60 61 #include <stdio.h> 62 #include <errno.h> 63 #define USE_SOCKETS 64 #include "cryptlib.h" 65 #include <openssl/bio.h> 66 67 #ifndef BIO_FD 68 static int sock_write(BIO *h, const char *buf, int num); 69 static int sock_read(BIO *h, char *buf, int size); 70 static int sock_puts(BIO *h, const char *str); 71 static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2); 72 static int sock_new(BIO *h); 73 static int sock_free(BIO *data); 74 int BIO_sock_should_retry(int s); 75 #else 76 77 static int fd_write(BIO *h, const char *buf, int num); 78 static int fd_read(BIO *h, char *buf, int size); 79 static int fd_puts(BIO *h, const char *str); 80 static long fd_ctrl(BIO *h, int cmd, long arg1, void *arg2); 81 static int fd_new(BIO *h); 82 static int fd_free(BIO *data); 83 int BIO_fd_should_retry(int s); 84 #endif 85 86 #ifndef BIO_FD 87 static BIO_METHOD methods_sockp= 88 { 89 BIO_TYPE_SOCKET, 90 "socket", 91 sock_write, 92 sock_read, 93 sock_puts, 94 NULL, /* sock_gets, */ 95 sock_ctrl, 96 sock_new, 97 sock_free, 98 NULL, 99 }; 100 101 BIO_METHOD *BIO_s_socket(void) 102 { 103 return(&methods_sockp); 104 } 105 #else 106 static BIO_METHOD methods_fdp= 107 { 108 BIO_TYPE_FD,"file descriptor", 109 fd_write, 110 fd_read, 111 fd_puts, 112 NULL, /* fd_gets, */ 113 fd_ctrl, 114 fd_new, 115 fd_free, 116 NULL, 117 }; 118 119 BIO_METHOD *BIO_s_fd(void) 120 { 121 return(&methods_fdp); 122 } 123 #endif 124 125 #ifndef BIO_FD 126 BIO *BIO_new_socket(int fd, int close_flag) 127 #else 128 BIO *BIO_new_fd(int fd,int close_flag) 129 #endif 130 { 131 BIO *ret; 132 133 #ifndef BIO_FD 134 ret=BIO_new(BIO_s_socket()); 135 #else 136 ret=BIO_new(BIO_s_fd()); 137 #endif 138 if (ret == NULL) return(NULL); 139 BIO_set_fd(ret,fd,close_flag); 140 return(ret); 141 } 142 143 #ifndef BIO_FD 144 static int sock_new(BIO *bi) 145 #else 146 static int fd_new(BIO *bi) 147 #endif 148 { 149 bi->init=0; 150 bi->num=0; 151 bi->ptr=NULL; 152 bi->flags=0; 153 return(1); 154 } 155 156 #ifndef BIO_FD 157 static int sock_free(BIO *a) 158 #else 159 static int fd_free(BIO *a) 160 #endif 161 { 162 if (a == NULL) return(0); 163 if (a->shutdown) 164 { 165 if (a->init) 166 { 167 #ifndef BIO_FD 168 SHUTDOWN2(a->num); 169 #else /* BIO_FD */ 170 close(a->num); 171 #endif 172 173 } 174 a->init=0; 175 a->flags=0; 176 } 177 return(1); 178 } 179 180 #ifndef BIO_FD 181 static int sock_read(BIO *b, char *out, int outl) 182 #else 183 static int fd_read(BIO *b, char *out,int outl) 184 #endif 185 { 186 int ret=0; 187 188 if (out != NULL) 189 { 190 #ifndef BIO_FD 191 clear_socket_error(); 192 ret=readsocket(b->num,out,outl); 193 #else 194 clear_sys_error(); 195 ret=read(b->num,out,outl); 196 #endif 197 BIO_clear_retry_flags(b); 198 if (ret <= 0) 199 { 200 #ifndef BIO_FD 201 if (BIO_sock_should_retry(ret)) 202 #else 203 if (BIO_fd_should_retry(ret)) 204 #endif 205 BIO_set_retry_read(b); 206 } 207 } 208 return(ret); 209 } 210 211 #ifndef BIO_FD 212 static int sock_write(BIO *b, const char *in, int inl) 213 #else 214 static int fd_write(BIO *b, const char *in, int inl) 215 #endif 216 { 217 int ret; 218 219 #ifndef BIO_FD 220 clear_socket_error(); 221 ret=writesocket(b->num,in,inl); 222 #else 223 clear_sys_error(); 224 ret=write(b->num,in,inl); 225 #endif 226 BIO_clear_retry_flags(b); 227 if (ret <= 0) 228 { 229 #ifndef BIO_FD 230 if (BIO_sock_should_retry(ret)) 231 #else 232 if (BIO_fd_should_retry(ret)) 233 #endif 234 BIO_set_retry_write(b); 235 } 236 return(ret); 237 } 238 239 #ifndef BIO_FD 240 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) 241 #else 242 static long fd_ctrl(BIO *b, int cmd, long num, void *ptr) 243 #endif 244 { 245 long ret=1; 246 int *ip; 247 248 switch (cmd) 249 { 250 case BIO_CTRL_RESET: 251 num=0; 252 case BIO_C_FILE_SEEK: 253 #ifdef BIO_FD 254 ret=(long)lseek(b->num,num,0); 255 #else 256 ret=0; 257 #endif 258 break; 259 case BIO_C_FILE_TELL: 260 case BIO_CTRL_INFO: 261 #ifdef BIO_FD 262 ret=(long)lseek(b->num,0,1); 263 #else 264 ret=0; 265 #endif 266 break; 267 case BIO_C_SET_FD: 268 #ifndef BIO_FD 269 sock_free(b); 270 #else 271 fd_free(b); 272 #endif 273 b->num= *((int *)ptr); 274 b->shutdown=(int)num; 275 b->init=1; 276 break; 277 case BIO_C_GET_FD: 278 if (b->init) 279 { 280 ip=(int *)ptr; 281 if (ip != NULL) *ip=b->num; 282 ret=b->num; 283 } 284 else 285 ret= -1; 286 break; 287 case BIO_CTRL_GET_CLOSE: 288 ret=b->shutdown; 289 break; 290 case BIO_CTRL_SET_CLOSE: 291 b->shutdown=(int)num; 292 break; 293 case BIO_CTRL_PENDING: 294 case BIO_CTRL_WPENDING: 295 ret=0; 296 break; 297 case BIO_CTRL_DUP: 298 case BIO_CTRL_FLUSH: 299 ret=1; 300 break; 301 default: 302 ret=0; 303 break; 304 } 305 return(ret); 306 } 307 308 #ifdef undef 309 static int sock_gets(BIO *bp, char *buf,int size) 310 { 311 return(-1); 312 } 313 #endif 314 315 #ifndef BIO_FD 316 static int sock_puts(BIO *bp, const char *str) 317 #else 318 static int fd_puts(BIO *bp, const char *str) 319 #endif 320 { 321 int n,ret; 322 323 n=strlen(str); 324 #ifndef BIO_FD 325 ret=sock_write(bp,str,n); 326 #else 327 ret=fd_write(bp,str,n); 328 #endif 329 return(ret); 330 } 331 332 #ifndef BIO_FD 333 int BIO_sock_should_retry(int i) 334 #else 335 int BIO_fd_should_retry(int i) 336 #endif 337 { 338 int err; 339 340 if ((i == 0) || (i == -1)) 341 { 342 #ifndef BIO_FD 343 err=get_last_socket_error(); 344 #else 345 err=get_last_sys_error(); 346 #endif 347 348 #if defined(WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */ 349 if ((i == -1) && (err == 0)) 350 return(1); 351 #endif 352 353 #ifndef BIO_FD 354 return(BIO_sock_non_fatal_error(err)); 355 #else 356 return(BIO_fd_non_fatal_error(err)); 357 #endif 358 } 359 return(0); 360 } 361 362 #ifndef BIO_FD 363 int BIO_sock_non_fatal_error(int err) 364 #else 365 int BIO_fd_non_fatal_error(int err) 366 #endif 367 { 368 switch (err) 369 { 370 #if !defined(BIO_FD) && defined(WINDOWS) 371 # if defined(WSAEWOULDBLOCK) 372 case WSAEWOULDBLOCK: 373 # endif 374 375 # if 0 /* This appears to always be an error */ 376 # if defined(WSAENOTCONN) 377 case WSAENOTCONN: 378 # endif 379 # endif 380 #endif 381 382 #ifdef EWOULDBLOCK 383 # ifdef WSAEWOULDBLOCK 384 # if WSAEWOULDBLOCK != EWOULDBLOCK 385 case EWOULDBLOCK: 386 # endif 387 # else 388 case EWOULDBLOCK: 389 # endif 390 #endif 391 392 #if defined(ENOTCONN) 393 case ENOTCONN: 394 #endif 395 396 #ifdef EINTR 397 case EINTR: 398 #endif 399 400 #ifdef EAGAIN 401 #if EWOULDBLOCK != EAGAIN 402 case EAGAIN: 403 # endif 404 #endif 405 406 #ifdef EPROTO 407 case EPROTO: 408 #endif 409 410 #ifdef EINPROGRESS 411 case EINPROGRESS: 412 #endif 413 414 #ifdef EALREADY 415 case EALREADY: 416 #endif 417 return(1); 418 /* break; */ 419 default: 420 break; 421 } 422 return(0); 423 } 424 #endif 425