bss_sock.c revision 109998
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#ifdef WATT32 68#define sock_write SockWrite /* Watt-32 uses same names */ 69#define sock_read SockRead 70#define sock_puts SockPuts 71#endif 72 73static int sock_write(BIO *h, const char *buf, int num); 74static int sock_read(BIO *h, char *buf, int size); 75static int sock_puts(BIO *h, const char *str); 76static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2); 77static int sock_new(BIO *h); 78static int sock_free(BIO *data); 79int BIO_sock_should_retry(int s); 80 81static BIO_METHOD methods_sockp= 82 { 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 95BIO_METHOD *BIO_s_socket(void) 96 { 97 return(&methods_sockp); 98 } 99 100BIO *BIO_new_socket(int fd, int close_flag) 101 { 102 BIO *ret; 103 104 ret=BIO_new(BIO_s_socket()); 105 if (ret == NULL) return(NULL); 106 BIO_set_fd(ret,fd,close_flag); 107 return(ret); 108 } 109 110static int sock_new(BIO *bi) 111 { 112 bi->init=0; 113 bi->num=0; 114 bi->ptr=NULL; 115 bi->flags=0; 116 return(1); 117 } 118 119static int sock_free(BIO *a) 120 { 121 if (a == NULL) return(0); 122 if (a->shutdown) 123 { 124 if (a->init) 125 { 126 SHUTDOWN2(a->num); 127 } 128 a->init=0; 129 a->flags=0; 130 } 131 return(1); 132 } 133 134static int sock_read(BIO *b, char *out, int outl) 135 { 136 int ret=0; 137 138 if (out != NULL) 139 { 140 clear_socket_error(); 141 ret=readsocket(b->num,out,outl); 142 BIO_clear_retry_flags(b); 143 if (ret <= 0) 144 { 145 if (BIO_sock_should_retry(ret)) 146 BIO_set_retry_read(b); 147 } 148 } 149 return(ret); 150 } 151 152static int sock_write(BIO *b, const char *in, int inl) 153 { 154 int ret; 155 156 clear_socket_error(); 157 ret=writesocket(b->num,in,inl); 158 BIO_clear_retry_flags(b); 159 if (ret <= 0) 160 { 161 if (BIO_sock_should_retry(ret)) 162 BIO_set_retry_write(b); 163 } 164 return(ret); 165 } 166 167static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) 168 { 169 long ret=1; 170 int *ip; 171 172 switch (cmd) 173 { 174 case BIO_CTRL_RESET: 175 num=0; 176 case BIO_C_FILE_SEEK: 177 ret=0; 178 break; 179 case BIO_C_FILE_TELL: 180 case BIO_CTRL_INFO: 181 ret=0; 182 break; 183 case BIO_C_SET_FD: 184 sock_free(b); 185 b->num= *((int *)ptr); 186 b->shutdown=(int)num; 187 b->init=1; 188 break; 189 case BIO_C_GET_FD: 190 if (b->init) 191 { 192 ip=(int *)ptr; 193 if (ip != NULL) *ip=b->num; 194 ret=b->num; 195 } 196 else 197 ret= -1; 198 break; 199 case BIO_CTRL_GET_CLOSE: 200 ret=b->shutdown; 201 break; 202 case BIO_CTRL_SET_CLOSE: 203 b->shutdown=(int)num; 204 break; 205 case BIO_CTRL_PENDING: 206 case BIO_CTRL_WPENDING: 207 ret=0; 208 break; 209 case BIO_CTRL_DUP: 210 case BIO_CTRL_FLUSH: 211 ret=1; 212 break; 213 default: 214 ret=0; 215 break; 216 } 217 return(ret); 218 } 219 220static int sock_puts(BIO *bp, const char *str) 221 { 222 int n,ret; 223 224 n=strlen(str); 225 ret=sock_write(bp,str,n); 226 return(ret); 227 } 228 229int BIO_sock_should_retry(int i) 230 { 231 int err; 232 233 if ((i == 0) || (i == -1)) 234 { 235 err=get_last_socket_error(); 236 237#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */ 238 if ((i == -1) && (err == 0)) 239 return(1); 240#endif 241 242 return(BIO_sock_non_fatal_error(err)); 243 } 244 return(0); 245 } 246 247int BIO_sock_non_fatal_error(int err) 248 { 249 switch (err) 250 { 251#if defined(OPENSSL_SYS_WINDOWS) 252# if defined(WSAEWOULDBLOCK) 253 case WSAEWOULDBLOCK: 254# endif 255 256# if 0 /* This appears to always be an error */ 257# if defined(WSAENOTCONN) 258 case WSAENOTCONN: 259# endif 260# endif 261#endif 262 263#ifdef EWOULDBLOCK 264# ifdef WSAEWOULDBLOCK 265# if WSAEWOULDBLOCK != EWOULDBLOCK 266 case EWOULDBLOCK: 267# endif 268# else 269 case EWOULDBLOCK: 270# endif 271#endif 272 273#if defined(ENOTCONN) 274 case ENOTCONN: 275#endif 276 277#ifdef EINTR 278 case EINTR: 279#endif 280 281#ifdef EAGAIN 282#if EWOULDBLOCK != EAGAIN 283 case EAGAIN: 284# endif 285#endif 286 287#ifdef EPROTO 288 case EPROTO: 289#endif 290 291#ifdef EINPROGRESS 292 case EINPROGRESS: 293#endif 294 295#ifdef EALREADY 296 case EALREADY: 297#endif 298 return(1); 299 /* break; */ 300 default: 301 break; 302 } 303 return(0); 304 } 305#endif 306