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#include <openssl/bio.h> 59 60#include <fcntl.h> 61 62#if !defined(OPENSSL_WINDOWS) 63#include <unistd.h> 64#endif 65 66#include "internal.h" 67 68 69static int sock_new(BIO *bio) { 70 bio->init = 0; 71 bio->num = 0; 72 bio->ptr = NULL; 73 bio->flags = 0; 74 return 1; 75} 76 77static int sock_free(BIO *bio) { 78 if (bio == NULL) { 79 return 0; 80 } 81 82 if (bio->shutdown) { 83 if (bio->init) { 84 close(bio->num); 85 } 86 bio->init = 0; 87 bio->flags = 0; 88 } 89 return 1; 90} 91 92static int sock_read(BIO *b, char *out, int outl) { 93 int ret = 0; 94 95 if (out == NULL) { 96 return 0; 97 } 98 99 bio_clear_socket_error(); 100 ret = recv(b->num, out, outl, 0); 101 BIO_clear_retry_flags(b); 102 if (ret <= 0) { 103 if (bio_fd_should_retry(ret)) { 104 BIO_set_retry_read(b); 105 } 106 } 107 return ret; 108} 109 110static int sock_write(BIO *b, const char *in, int inl) { 111 int ret; 112 113 bio_clear_socket_error(); 114 ret = send(b->num, in, inl, 0); 115 BIO_clear_retry_flags(b); 116 if (ret <= 0) { 117 if (bio_fd_should_retry(ret)) { 118 BIO_set_retry_write(b); 119 } 120 } 121 return ret; 122} 123 124static int sock_puts(BIO *bp, const char *str) { 125 return sock_write(bp, str, strlen(str)); 126} 127 128static long sock_ctrl(BIO *b, int cmd, long num, void *ptr) { 129 long ret = 1; 130 int *ip; 131 132 switch (cmd) { 133 case BIO_C_SET_FD: 134 sock_free(b); 135 b->num = *((int *)ptr); 136 b->shutdown = (int)num; 137 b->init = 1; 138 break; 139 case BIO_C_GET_FD: 140 if (b->init) { 141 ip = (int *)ptr; 142 if (ip != NULL) 143 *ip = b->num; 144 ret = b->num; 145 } else 146 ret = -1; 147 break; 148 case BIO_CTRL_GET_CLOSE: 149 ret = b->shutdown; 150 break; 151 case BIO_CTRL_SET_CLOSE: 152 b->shutdown = (int)num; 153 break; 154 case BIO_CTRL_FLUSH: 155 ret = 1; 156 break; 157 default: 158 ret = 0; 159 break; 160 } 161 return ret; 162} 163 164static const BIO_METHOD methods_sockp = { 165 BIO_TYPE_SOCKET, "socket", sock_write, sock_read, sock_puts, 166 NULL /* gets, */, sock_ctrl, sock_new, sock_free, NULL, 167}; 168 169const BIO_METHOD *BIO_s_socket(void) { return &methods_sockp; } 170 171BIO *BIO_new_socket(int fd, int close_flag) { 172 BIO *ret; 173 174 ret = BIO_new(BIO_s_socket()); 175 if (ret == NULL) { 176 return NULL; 177 } 178 BIO_set_fd(ret, fd, close_flag); 179 return ret; 180} 181