bss_sock.c revision 221304ee937bc0910948a8be1320cb8cc4eb6d36
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 74static int sock_write(BIO *h, const char *buf, int num); 75static int sock_read(BIO *h, char *buf, int size); 76static int sock_puts(BIO *h, const char *str); 77static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2); 78static int sock_new(BIO *h); 79static int sock_free(BIO *data); 80int BIO_sock_should_retry(int s); 81 82static 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 96BIO_METHOD *BIO_s_socket(void) 97 { 98 return(&methods_sockp); 99 } 100 101BIO *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 111static 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 120static 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 135static 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 153static 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 168static 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_C_SET_FD: 176 sock_free(b); 177 b->num= *((int *)ptr); 178 b->shutdown=(int)num; 179 b->init=1; 180 break; 181 case BIO_C_GET_FD: 182 if (b->init) 183 { 184 ip=(int *)ptr; 185 if (ip != NULL) *ip=b->num; 186 ret=b->num; 187 } 188 else 189 ret= -1; 190 break; 191 case BIO_CTRL_GET_CLOSE: 192 ret=b->shutdown; 193 break; 194 case BIO_CTRL_SET_CLOSE: 195 b->shutdown=(int)num; 196 break; 197 case BIO_CTRL_DUP: 198 case BIO_CTRL_FLUSH: 199 ret=1; 200 break; 201 default: 202 ret=0; 203 break; 204 } 205 return(ret); 206 } 207 208static int sock_puts(BIO *bp, const char *str) 209 { 210 int n,ret; 211 212 n=strlen(str); 213 ret=sock_write(bp,str,n); 214 return(ret); 215 } 216 217int BIO_sock_should_retry(int i) 218 { 219 int err; 220 221 if ((i == 0) || (i == -1)) 222 { 223 err=get_last_socket_error(); 224 225#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */ 226 if ((i == -1) && (err == 0)) 227 return(1); 228#endif 229 230 return(BIO_sock_non_fatal_error(err)); 231 } 232 return(0); 233 } 234 235int BIO_sock_non_fatal_error(int err) 236 { 237 switch (err) 238 { 239#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE) 240# if defined(WSAEWOULDBLOCK) 241 case WSAEWOULDBLOCK: 242# endif 243 244# if 0 /* This appears to always be an error */ 245# if defined(WSAENOTCONN) 246 case WSAENOTCONN: 247# endif 248# endif 249#endif 250 251#ifdef EWOULDBLOCK 252# ifdef WSAEWOULDBLOCK 253# if WSAEWOULDBLOCK != EWOULDBLOCK 254 case EWOULDBLOCK: 255# endif 256# else 257 case EWOULDBLOCK: 258# endif 259#endif 260 261#if defined(ENOTCONN) 262 case ENOTCONN: 263#endif 264 265#ifdef EINTR 266 case EINTR: 267#endif 268 269#ifdef EAGAIN 270# if EWOULDBLOCK != EAGAIN 271 case EAGAIN: 272# endif 273#endif 274 275#ifdef EPROTO 276 case EPROTO: 277#endif 278 279#ifdef EINPROGRESS 280 case EINPROGRESS: 281#endif 282 283#ifdef EALREADY 284 case EALREADY: 285#endif 286 return(1); 287 /* break; */ 288 default: 289 break; 290 } 291 return(0); 292 } 293 294#endif /* #ifndef OPENSSL_NO_SOCK */ 295