bss_sock.c revision 160814
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#include <openssl/bio.h> 64 65#ifdef WATT32 66#define sock_write SockWrite /* Watt-32 uses same names */ 67#define sock_read SockRead 68#define sock_puts SockPuts 69#endif 70 71static int sock_write(BIO *h, const char *buf, int num); 72static int sock_read(BIO *h, char *buf, int size); 73static int sock_puts(BIO *h, const char *str); 74static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2); 75static int sock_new(BIO *h); 76static int sock_free(BIO *data); 77int BIO_sock_should_retry(int s); 78 79static BIO_METHOD methods_sockp= 80 { 81 BIO_TYPE_SOCKET, 82 "socket", 83 sock_write, 84 sock_read, 85 sock_puts, 86 NULL, /* sock_gets, */ 87 sock_ctrl, 88 sock_new, 89 sock_free, 90 NULL, 91 }; 92 93BIO_METHOD *BIO_s_socket(void) 94 { 95 return(&methods_sockp); 96 } 97 98BIO *BIO_new_socket(int fd, int close_flag) 99 { 100 BIO *ret; 101 102 ret=BIO_new(BIO_s_socket()); 103 if (ret == NULL) return(NULL); 104 BIO_set_fd(ret,fd,close_flag); 105 return(ret); 106 } 107 108static int sock_new(BIO *bi) 109 { 110 bi->init=0; 111 bi->num=0; 112 bi->ptr=NULL; 113 bi->flags=0; 114 return(1); 115 } 116 117static int sock_free(BIO *a) 118 { 119 if (a == NULL) return(0); 120 if (a->shutdown) 121 { 122 if (a->init) 123 { 124 SHUTDOWN2(a->num); 125 } 126 a->init=0; 127 a->flags=0; 128 } 129 return(1); 130 } 131 132static int sock_read(BIO *b, char *out, int outl) 133 { 134 int ret=0; 135 136 if (out != NULL) 137 { 138 clear_socket_error(); 139 ret=readsocket(b->num,out,outl); 140 BIO_clear_retry_flags(b); 141 if (ret <= 0) 142 { 143 if (BIO_sock_should_retry(ret)) 144 BIO_set_retry_read(b); 145 } 146 } 147 return(ret); 148 } 149 150static int sock_write(BIO *b, const char *in, int inl) 151 { 152 int ret; 153 154 clear_socket_error(); 155 ret=writesocket(b->num,in,inl); 156 BIO_clear_retry_flags(b); 157 if (ret <= 0) 158 { 159 if (BIO_sock_should_retry(ret)) 160 BIO_set_retry_write(b); 161 } 162 return(ret); 163 } 164 165static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) 166 { 167 long ret=1; 168 int *ip; 169 170 switch (cmd) 171 { 172 case BIO_CTRL_RESET: 173 num=0; 174 case BIO_C_FILE_SEEK: 175 ret=0; 176 break; 177 case BIO_C_FILE_TELL: 178 case BIO_CTRL_INFO: 179 ret=0; 180 break; 181 case BIO_C_SET_FD: 182 sock_free(b); 183 b->num= *((int *)ptr); 184 b->shutdown=(int)num; 185 b->init=1; 186 break; 187 case BIO_C_GET_FD: 188 if (b->init) 189 { 190 ip=(int *)ptr; 191 if (ip != NULL) *ip=b->num; 192 ret=b->num; 193 } 194 else 195 ret= -1; 196 break; 197 case BIO_CTRL_GET_CLOSE: 198 ret=b->shutdown; 199 break; 200 case BIO_CTRL_SET_CLOSE: 201 b->shutdown=(int)num; 202 break; 203 case BIO_CTRL_PENDING: 204 case BIO_CTRL_WPENDING: 205 ret=0; 206 break; 207 case BIO_CTRL_DUP: 208 case BIO_CTRL_FLUSH: 209 ret=1; 210 break; 211 default: 212 ret=0; 213 break; 214 } 215 return(ret); 216 } 217 218static int sock_puts(BIO *bp, const char *str) 219 { 220 int n,ret; 221 222 n=strlen(str); 223 ret=sock_write(bp,str,n); 224 return(ret); 225 } 226 227int BIO_sock_should_retry(int i) 228 { 229 int err; 230 231 if ((i == 0) || (i == -1)) 232 { 233 err=get_last_socket_error(); 234 235#if defined(OPENSSL_SYS_WINDOWS) && 0 /* more microsoft stupidity? perhaps not? Ben 4/1/99 */ 236 if ((i == -1) && (err == 0)) 237 return(1); 238#endif 239 240 return(BIO_sock_non_fatal_error(err)); 241 } 242 return(0); 243 } 244 245int BIO_sock_non_fatal_error(int err) 246 { 247 switch (err) 248 { 249#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE) 250# if defined(WSAEWOULDBLOCK) 251 case WSAEWOULDBLOCK: 252# endif 253 254# if 0 /* This appears to always be an error */ 255# if defined(WSAENOTCONN) 256 case WSAENOTCONN: 257# endif 258# endif 259#endif 260 261#ifdef EWOULDBLOCK 262# ifdef WSAEWOULDBLOCK 263# if WSAEWOULDBLOCK != EWOULDBLOCK 264 case EWOULDBLOCK: 265# endif 266# else 267 case EWOULDBLOCK: 268# endif 269#endif 270 271#if defined(ENOTCONN) 272 case ENOTCONN: 273#endif 274 275#ifdef EINTR 276 case EINTR: 277#endif 278 279#ifdef EAGAIN 280# if EWOULDBLOCK != EAGAIN 281 case EAGAIN: 282# endif 283#endif 284 285#ifdef EPROTO 286 case EPROTO: 287#endif 288 289#ifdef EINPROGRESS 290 case EINPROGRESS: 291#endif 292 293#ifdef EALREADY 294 case EALREADY: 295#endif 296 return(1); 297 /* break; */ 298 default: 299 break; 300 } 301 return(0); 302 } 303