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 "bio.h" 66 67 #ifndef BIO_FD 68 #ifndef NOPROTO 69 static int sock_write(BIO *h,char *buf,int num); 70 static int sock_read(BIO *h,char *buf,int size); 71 static int sock_puts(BIO *h,char *str); 72 static long sock_ctrl(BIO *h,int cmd,long arg1,char *arg2); 73 static int sock_new(BIO *h); 74 static int sock_free(BIO *data); 75 int BIO_sock_should_retry(int s); 76 #else 77 static int sock_write(); 78 static int sock_read(); 79 static int sock_puts(); 80 static long sock_ctrl(); 81 static int sock_new(); 82 static int sock_free(); 83 int BIO_sock_should_retry(); 84 #endif 85 86 #else 87 88 #ifndef NOPROTO 89 static int fd_write(BIO *h,char *buf,int num); 90 static int fd_read(BIO *h,char *buf,int size); 91 static int fd_puts(BIO *h,char *str); 92 static long fd_ctrl(BIO *h,int cmd,long arg1,char *arg2); 93 static int fd_new(BIO *h); 94 static int fd_free(BIO *data); 95 int BIO_fd_should_retry(int s); 96 #else 97 static int fd_write(); 98 static int fd_read(); 99 static int fd_puts(); 100 static long fd_ctrl(); 101 static int fd_new(); 102 static int fd_free(); 103 int BIO_fd_should_retry(); 104 #endif 105 #endif 106 107 #ifndef BIO_FD 108 static BIO_METHOD methods_sockp= 109 { 110 BIO_TYPE_SOCKET, 111 "socket", 112 sock_write, 113 sock_read, 114 sock_puts, 115 NULL, /* sock_gets, */ 116 sock_ctrl, 117 sock_new, 118 sock_free, 119 }; 120 121 BIO_METHOD *BIO_s_socket() 122 { 123 return(&methods_sockp); 124 } 125 #else 126 static BIO_METHOD methods_fdp= 127 { 128 BIO_TYPE_FD,"file descriptor", 129 fd_write, 130 fd_read, 131 fd_puts, 132 NULL, /* fd_gets, */ 133 fd_ctrl, 134 fd_new, 135 fd_free, 136 }; 137 138 BIO_METHOD *BIO_s_fd() 139 { 140 return(&methods_fdp); 141 } 142 #endif 143 144 #ifndef BIO_FD 145 BIO *BIO_new_socket(fd,close_flag) 146 #else 147 BIO *BIO_new_fd(fd,close_flag) 148 #endif 149 int fd; 150 int close_flag; 151 { 152 BIO *ret; 153 154 #ifndef BIO_FD 155 ret=BIO_new(BIO_s_socket()); 156 #else 157 ret=BIO_new(BIO_s_fd()); 158 #endif 159 if (ret == NULL) return(NULL); 160 BIO_set_fd(ret,fd,close_flag); 161 return(ret); 162 } 163 164 #ifndef BIO_FD 165 static int sock_new(bi) 166 #else 167 static int fd_new(bi) 168 #endif 169 BIO *bi; 170 { 171 bi->init=0; 172 bi->num=0; 173 bi->ptr=NULL; 174 bi->flags=0; 175 return(1); 176 } 177 178 #ifndef BIO_FD 179 static int sock_free(a) 180 #else 181 static int fd_free(a) 182 #endif 183 BIO *a; 184 { 185 if (a == NULL) return(0); 186 if (a->shutdown) 187 { 188 if (a->init) 189 { 190 #ifndef BIO_FD 191 shutdown(a->num,2); 192 # ifdef WINDOWS 193 closesocket(a->num); 194 # else 195 close(a->num); 196 # endif 197 #else /* BIO_FD */ 198 close(a->num); 199 #endif 200 201 } 202 a->init=0; 203 a->flags=0; 204 } 205 return(1); 206 } 207 208 #ifndef BIO_FD 209 static int sock_read(b,out,outl) 210 #else 211 static int fd_read(b,out,outl) 212 #endif 213 BIO *b; 214 char *out; 215 int outl; 216 { 217 int ret=0; 218 219 if (out != NULL) 220 { 221 #if defined(WINDOWS) && !defined(BIO_FD) 222 clear_socket_error(); 223 ret=recv(b->num,out,outl,0); 224 #else 225 clear_sys_error(); 226 ret=read(b->num,out,outl); 227 #endif 228 BIO_clear_retry_flags(b); 229 if (ret <= 0) 230 { 231 #ifndef BIO_FD 232 if (BIO_sock_should_retry(ret)) 233 #else 234 if (BIO_fd_should_retry(ret)) 235 #endif 236 BIO_set_retry_read(b); 237 } 238 } 239 return(ret); 240 } 241 242 #ifndef BIO_FD 243 static int sock_write(b,in,inl) 244 #else 245 static int fd_write(b,in,inl) 246 #endif 247 BIO *b; 248 char *in; 249 int inl; 250 { 251 int ret; 252 253 #if defined(WINDOWS) && !defined(BIO_FD) 254 clear_socket_error(); 255 ret=send(b->num,in,inl,0); 256 #else 257 clear_sys_error(); 258 ret=write(b->num,in,inl); 259 #endif 260 BIO_clear_retry_flags(b); 261 if (ret <= 0) 262 { 263 #ifndef BIO_FD 264 if (BIO_sock_should_retry(ret)) 265 #else 266 if (BIO_fd_should_retry(ret)) 267 #endif 268 BIO_set_retry_write(b); 269 } 270 return(ret); 271 } 272 273 #ifndef BIO_FD 274 static long sock_ctrl(b,cmd,num,ptr) 275 #else 276 static long fd_ctrl(b,cmd,num,ptr) 277 #endif 278 BIO *b; 279 int cmd; 280 long num; 281 char *ptr; 282 { 283 long ret=1; 284 int *ip; 285 286 switch (cmd) 287 { 288 case BIO_CTRL_RESET: 289 #ifdef BIO_FD 290 ret=(long)lseek(b->num,0,0); 291 #else 292 ret=0; 293 #endif 294 break; 295 case BIO_CTRL_INFO: 296 ret=0; 297 break; 298 case BIO_C_SET_FD: 299 #ifndef BIO_FD 300 sock_free(b); 301 #else 302 fd_free(b); 303 #endif 304 b->num= *((int *)ptr); 305 b->shutdown=(int)num; 306 b->init=1; 307 break; 308 case BIO_C_GET_FD: 309 if (b->init) 310 { 311 ip=(int *)ptr; 312 if (ip != NULL) *ip=b->num; 313 ret=b->num; 314 } 315 else 316 ret= -1; 317 break; 318 case BIO_CTRL_GET_CLOSE: 319 ret=b->shutdown; 320 break; 321 case BIO_CTRL_SET_CLOSE: 322 b->shutdown=(int)num; 323 break; 324 case BIO_CTRL_PENDING: 325 case BIO_CTRL_WPENDING: 326 ret=0; 327 break; 328 case BIO_CTRL_DUP: 329 case BIO_CTRL_FLUSH: 330 ret=1; 331 break; 332 break; 333 default: 334 ret=0; 335 break; 336 } 337 return(ret); 338 } 339 340 #ifdef undef 341 static int sock_gets(bp,buf,size) 342 BIO *bp; 343 char *buf; 344 int size; 345 { 346 return(-1); 347 } 348 #endif 349 350 #ifndef BIO_FD 351 static int sock_puts(bp,str) 352 #else 353 static int fd_puts(bp,str) 354 #endif 355 BIO *bp; 356 char *str; 357 { 358 int n,ret; 359 360 n=strlen(str); 361 #ifndef BIO_FD 362 ret=sock_write(bp,str,n); 363 #else 364 ret=fd_write(bp,str,n); 365 #endif 366 return(ret); 367 } 368 369 #ifndef BIO_FD 370 int BIO_sock_should_retry(i) 371 #else 372 int BIO_fd_should_retry(i) 373 #endif 374 int i; 375 { 376 int err; 377 378 if ((i == 0) || (i == -1)) 379 { 380 #if !defined(BIO_FD) && defined(WINDOWS) 381 err=get_last_socket_error(); 382 #else 383 err=get_last_sys_error(); 384 #endif 385 386 #if defined(WINDOWS) /* more microsoft stupidity */ 387 if ((i == -1) && (err == 0)) 388 return(1); 389 #endif 390 391 #ifndef BIO_FD 392 return(BIO_sock_non_fatal_error(err)); 393 #else 394 return(BIO_fd_non_fatal_error(err)); 395 #endif 396 } 397 return(0); 398 } 399 400 #ifndef BIO_FD 401 int BIO_sock_non_fatal_error(err) 402 #else 403 int BIO_fd_non_fatal_error(err) 404 #endif 405 int err; 406 { 407 switch (err) 408 { 409 #if !defined(BIO_FD) && defined(WINDOWS) 410 # if defined(WSAEWOULDBLOCK) 411 case WSAEWOULDBLOCK: 412 # endif 413 414 # if defined(WSAENOTCONN) 415 case WSAENOTCONN: 416 # endif 417 #endif 418 419 #ifdef EWOULDBLOCK 420 # ifdef WSAEWOULDBLOCK 421 # if WSAEWOULDBLOCK != EWOULDBLOCK 422 case EWOULDBLOCK: 423 # endif 424 # else 425 case EWOULDBLOCK: 426 # endif 427 #endif 428 429 #if defined(ENOTCONN) 430 case ENOTCONN: 431 #endif 432 433 #ifdef EINTR 434 case EINTR: 435 #endif 436 437 #ifdef EAGAIN 438 #if EWOULDBLOCK != EAGAIN 439 case EAGAIN: 440 # endif 441 #endif 442 443 #ifdef EPROTO 444 case EPROTO: 445 #endif 446 447 #ifdef EINPROGRESS 448 case EINPROGRESS: 449 #endif 450 451 #ifdef EALREADY 452 case EALREADY: 453 #endif 454 return(1); 455 break; 456 default: 457 break; 458 } 459 return(0); 460 } 461 #endif 462