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 74 static int sock_write(BIO *h, const char *buf, int num); 75 static int sock_read(BIO *h, char *buf, int size); 76 static int sock_puts(BIO *h, const char *str); 77 static long sock_ctrl(BIO *h, int cmd, long arg1, void *arg2); 78 static int sock_new(BIO *h); 79 static int sock_free(BIO *data); 80 int BIO_sock_should_retry(int s); 81 82 static BIO_METHOD methods_sockp = { 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 95 BIO_METHOD 96 *BIO_s_socket(void) 97 { 98 return (&methods_sockp); 99 } 100 101 BIO 102 *BIO_new_socket(int fd, int close_flag) 103 { 104 BIO *ret; 105 106 ret = BIO_new(BIO_s_socket()); 107 if (ret == NULL) 108 return (NULL); 109 BIO_set_fd(ret, fd, close_flag); 110 return (ret); 111 } 112 113 static int 114 sock_new(BIO *bi) 115 { 116 bi->init = 0; 117 bi->num = 0; 118 bi->ptr = NULL; 119 bi->flags = 0; 120 return (1); 121 } 122 123 static int 124 sock_free(BIO *a) 125 { 126 if (a == NULL) 127 return (0); 128 if (a->shutdown) { 129 if (a->init) { 130 shutdown(a->num, SHUT_RDWR); 131 close(a->num); 132 } 133 a->init = 0; 134 a->flags = 0; 135 } 136 return (1); 137 } 138 139 static int 140 sock_read(BIO *b, char *out, int outl) 141 { 142 int ret = 0; 143 144 if (out != NULL) { 145 errno = 0; 146 ret = read(b->num, out, outl); 147 BIO_clear_retry_flags(b); 148 if (ret <= 0) { 149 if (BIO_sock_should_retry(ret)) 150 BIO_set_retry_read(b); 151 } 152 } 153 return (ret); 154 } 155 156 static int 157 sock_write(BIO *b, const char *in, int inl) 158 { 159 int ret; 160 161 errno = 0; 162 ret = write(b->num, in, inl); 163 BIO_clear_retry_flags(b); 164 if (ret <= 0) { 165 if (BIO_sock_should_retry(ret)) 166 BIO_set_retry_write(b); 167 } 168 return (ret); 169 } 170 171 static long 172 sock_ctrl(BIO *b, int cmd, long num, void *ptr) 173 { 174 long ret = 1; 175 int *ip; 176 177 switch (cmd) { 178 case BIO_C_SET_FD: 179 sock_free(b); 180 b->num= *((int *)ptr); 181 b->shutdown = (int)num; 182 b->init = 1; 183 break; 184 case BIO_C_GET_FD: 185 if (b->init) { 186 ip = (int *)ptr; 187 if (ip != NULL) 188 *ip = b->num; 189 ret = b->num; 190 } else 191 ret = -1; 192 break; 193 case BIO_CTRL_GET_CLOSE: 194 ret = b->shutdown; 195 break; 196 case BIO_CTRL_SET_CLOSE: 197 b->shutdown = (int)num; 198 break; 199 case BIO_CTRL_DUP: 200 case BIO_CTRL_FLUSH: 201 ret = 1; 202 break; 203 default: 204 ret = 0; 205 break; 206 } 207 return (ret); 208 } 209 210 static int 211 sock_puts(BIO *bp, const char *str) 212 { 213 int n, ret; 214 215 n = strlen(str); 216 ret = sock_write(bp, str, n); 217 return (ret); 218 } 219 220 int 221 BIO_sock_should_retry(int i) 222 { 223 int err; 224 225 if ((i == 0) || (i == -1)) { 226 err = errno; 227 return (BIO_sock_non_fatal_error(err)); 228 } 229 return (0); 230 } 231 232 int 233 BIO_sock_non_fatal_error(int err) 234 { 235 switch (err) { 236 case ENOTCONN: 237 case EINTR: 238 case EAGAIN: 239 case EINPROGRESS: 240 case EALREADY: 241 return (1); 242 default: 243 break; 244 } 245 return (0); 246 } 247 248 #endif /* #ifndef OPENSSL_NO_SOCK */ 249