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 #pragma warning(push, 3) 67 #include <winsock2.h> 68 #pragma warning(pop) 69 70 #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 ret = recv(b->num, out, outl, 0); 114 BIO_clear_retry_flags(b); 115 if (ret <= 0) { 116 if (bio_fd_should_retry(ret)) { 117 BIO_set_retry_read(b); 118 } 119 } 120 return ret; 121 } 122 123 static int sock_write(BIO *b, const char *in, int inl) { 124 int ret; 125 126 bio_clear_socket_error(); 127 ret = send(b->num, in, inl, 0); 128 BIO_clear_retry_flags(b); 129 if (ret <= 0) { 130 if (bio_fd_should_retry(ret)) { 131 BIO_set_retry_write(b); 132 } 133 } 134 return ret; 135 } 136 137 static int sock_puts(BIO *bp, const char *str) { 138 return sock_write(bp, str, strlen(str)); 139 } 140 141 static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) { 142 long ret = 1; 143 int *ip; 144 145 switch (cmd) { 146 case BIO_C_SET_FD: 147 sock_free(b); 148 b->num = *((int *)ptr); 149 b->shutdown = (int)num; 150 b->init = 1; 151 break; 152 case BIO_C_GET_FD: 153 if (b->init) { 154 ip = (int *)ptr; 155 if (ip != NULL) { 156 *ip = b->num; 157 } 158 ret = b->num; 159 } else { 160 ret = -1; 161 } 162 break; 163 case BIO_CTRL_GET_CLOSE: 164 ret = b->shutdown; 165 break; 166 case BIO_CTRL_SET_CLOSE: 167 b->shutdown = (int)num; 168 break; 169 case BIO_CTRL_FLUSH: 170 ret = 1; 171 break; 172 default: 173 ret = 0; 174 break; 175 } 176 return ret; 177 } 178 179 static const BIO_METHOD methods_sockp = { 180 BIO_TYPE_SOCKET, "socket", sock_write, sock_read, sock_puts, 181 NULL /* gets, */, sock_ctrl, sock_new, sock_free, NULL, 182 }; 183 184 const BIO_METHOD *BIO_s_socket(void) { return &methods_sockp; } 185 186 BIO *BIO_new_socket(int fd, int close_flag) { 187 BIO *ret; 188 189 ret = BIO_new(BIO_s_socket()); 190 if (ret == NULL) { 191 return NULL; 192 } 193 BIO_set_fd(ret, fd, close_flag); 194 return ret; 195 } 196
