1 /* crypto/bio/bss_sock.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #include <openssl/bio.h> 59 60 #include <fcntl.h> 61 #include <string.h> 62 63 #if !defined(OPENSSL_WINDOWS) 64 #include <unistd.h> 65 #else 66 OPENSSL_MSVC_PRAGMA(warning(push, 3)) 67 #include <winsock2.h> 68 OPENSSL_MSVC_PRAGMA(warning(pop)) 69 70 OPENSSL_MSVC_PRAGMA(comment(lib, "Ws2_32.lib")) 71 #endif 72 73 #include "internal.h" 74 75 76 #if !defined(OPENSSL_WINDOWS) 77 static int closesocket(int sock) { 78 return close(sock); 79 } 80 #endif 81 82 static int sock_new(BIO *bio) { 83 bio->init = 0; 84 bio->num = 0; 85 bio->ptr = NULL; 86 bio->flags = 0; 87 return 1; 88 } 89 90 static int sock_free(BIO *bio) { 91 if (bio == NULL) { 92 return 0; 93 } 94 95 if (bio->shutdown) { 96 if (bio->init) { 97 closesocket(bio->num); 98 } 99 bio->init = 0; 100 bio->flags = 0; 101 } 102 return 1; 103 } 104 105 static int sock_read(BIO *b, char *out, int outl) { 106 int ret = 0; 107 108 if (out == NULL) { 109 return 0; 110 } 111 112 bio_clear_socket_error(); 113 #if defined(OPENSSL_WINDOWS) 114 ret = recv(b->num, out, outl, 0); 115 #else 116 ret = read(b->num, out, outl); 117 #endif 118 BIO_clear_retry_flags(b); 119 if (ret <= 0) { 120 if (bio_fd_should_retry(ret)) { 121 BIO_set_retry_read(b); 122 } 123 } 124 return ret; 125 } 126 127 static int sock_write(BIO *b, const char *in, int inl) { 128 int ret; 129 130 bio_clear_socket_error(); 131 #if defined(OPENSSL_WINDOWS) 132 ret = send(b->num, in, inl, 0); 133 #else 134 ret = write(b->num, in, inl); 135 #endif 136 BIO_clear_retry_flags(b); 137 if (ret <= 0) { 138 if (bio_fd_should_retry(ret)) { 139 BIO_set_retry_write(b); 140 } 141 } 142 return ret; 143 } 144 145 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) { 146 long ret = 1; 147 int *ip; 148 149 switch (cmd) { 150 case BIO_C_SET_FD: 151 sock_free(b); 152 b->num = *((int *)ptr); 153 b->shutdown = (int)num; 154 b->init = 1; 155 break; 156 case BIO_C_GET_FD: 157 if (b->init) { 158 ip = (int *)ptr; 159 if (ip != NULL) { 160 *ip = b->num; 161 } 162 ret = b->num; 163 } else { 164 ret = -1; 165 } 166 break; 167 case BIO_CTRL_GET_CLOSE: 168 ret = b->shutdown; 169 break; 170 case BIO_CTRL_SET_CLOSE: 171 b->shutdown = (int)num; 172 break; 173 case BIO_CTRL_FLUSH: 174 ret = 1; 175 break; 176 default: 177 ret = 0; 178 break; 179 } 180 return ret; 181 } 182 183 static const BIO_METHOD methods_sockp = { 184 BIO_TYPE_SOCKET, "socket", 185 sock_write, sock_read, 186 NULL /* puts */, NULL /* gets, */, 187 sock_ctrl, sock_new, 188 sock_free, NULL /* callback_ctrl */, 189 }; 190 191 const BIO_METHOD *BIO_s_socket(void) { return &methods_sockp; } 192 193 BIO *BIO_new_socket(int fd, int close_flag) { 194 BIO *ret; 195 196 ret = BIO_new(BIO_s_socket()); 197 if (ret == NULL) { 198 return NULL; 199 } 200 BIO_set_fd(ret, fd, close_flag); 201 return ret; 202 } 203
