1 /* $OpenBSD: b_sock.c,v 1.65 2017/04/30 05:09:22 beck Exp $ */ 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 <sys/ioctl.h> 60 #include <sys/socket.h> 61 #include <string.h> 62 63 #include <arpa/inet.h> 64 #include <netinet/in.h> 65 #include <netinet/tcp.h> 66 67 #include <errno.h> 68 #include <limits.h> 69 #include <netdb.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <unistd.h> 73 74 #include <openssl/bio.h> 75 #include <openssl/buffer.h> 76 #include <openssl/err.h> 77 78 int 79 BIO_get_host_ip(const char *str, unsigned char *ip) 80 { 81 int i; 82 int err = 1; 83 struct hostent *he; 84 85 if (inet_pton(AF_INET, str, ip) == 1) 86 return (1); 87 88 /* do a gethostbyname */ 89 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME); 90 he = BIO_gethostbyname(str); 91 if (he == NULL) { 92 BIOerror(BIO_R_BAD_HOSTNAME_LOOKUP); 93 goto err; 94 } 95 96 if (he->h_addrtype != AF_INET) { 97 BIOerror(BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET); 98 goto err; 99 } 100 for (i = 0; i < 4; i++) 101 ip[i] = he->h_addr_list[0][i]; 102 err = 0; 103 104 err: 105 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME); 106 if (err) { 107 ERR_asprintf_error_data("host=%s", str); 108 return 0; 109 } else 110 return 1; 111 } 112 113 int 114 BIO_get_port(const char *str, unsigned short *port_ptr) 115 { 116 struct addrinfo *res = NULL; 117 struct addrinfo hints = { 118 .ai_family = AF_UNSPEC, 119 .ai_socktype = SOCK_STREAM, 120 .ai_flags = AI_PASSIVE, 121 }; 122 int error; 123 124 if (str == NULL) { 125 BIOerror(BIO_R_NO_PORT_SPECIFIED); 126 return (0); 127 } 128 129 if ((error = getaddrinfo(NULL, str, &hints, &res)) != 0) { 130 ERR_asprintf_error_data("getaddrinfo: service='%s' : %s'", str, 131 gai_strerror(error)); 132 return (0); 133 } 134 *port_ptr = ntohs(((struct sockaddr_in *)(res->ai_addr))->sin_port); 135 freeaddrinfo(res); 136 return (1); 137 } 138 139 int 140 BIO_sock_error(int sock) 141 { 142 socklen_t len; 143 int err; 144 145 len = sizeof(err); 146 if (getsockopt(sock, SOL_SOCKET, SO_ERROR, &err, &len) != 0) 147 return (1); 148 return (err); 149 } 150 151 struct hostent * 152 BIO_gethostbyname(const char *name) 153 { 154 return gethostbyname(name); 155 } 156 157 int 158 BIO_socket_ioctl(int fd, long type, void *arg) 159 { 160 int ret; 161 162 ret = ioctl(fd, type, arg); 163 if (ret < 0) 164 SYSerror(errno); 165 return (ret); 166 } 167 168 int 169 BIO_get_accept_socket(char *host, int bind_mode) 170 { 171 struct addrinfo hints = { 172 .ai_family = AF_INET, 173 .ai_socktype = SOCK_STREAM, 174 .ai_flags = AI_PASSIVE, 175 }; 176 struct addrinfo *res = NULL; 177 char *h, *p, *str = NULL; 178 int error, ret = 0, s = -1; 179 180 if (host == NULL || (str = strdup(host)) == NULL) 181 return (-1); 182 p = NULL; 183 h = str; 184 if ((p = strrchr(str, ':')) == NULL) { 185 BIOerror(BIO_R_NO_PORT_SPECIFIED); 186 goto err; 187 } 188 *p++ = '\0'; 189 if (*p == '\0') { 190 BIOerror(BIO_R_NO_PORT_SPECIFIED); 191 goto err; 192 } 193 if (*h == '\0' || strcmp(h, "*") == 0) 194 h = NULL; 195 196 if ((error = getaddrinfo(h, p, &hints, &res)) != 0) { 197 ERR_asprintf_error_data("getaddrinfo: '%s:%s': %s'", h, p, 198 gai_strerror(error)); 199 goto err; 200 } 201 if (h == NULL) { 202 struct sockaddr_in *sin = (struct sockaddr_in *)res->ai_addr; 203 sin->sin_addr.s_addr = INADDR_ANY; 204 } 205 206 s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 207 if (s == -1) { 208 SYSerror(errno); 209 ERR_asprintf_error_data("host='%s'", host); 210 BIOerror(BIO_R_UNABLE_TO_CREATE_SOCKET); 211 goto err; 212 } 213 if (bind_mode == BIO_BIND_REUSEADDR) { 214 int i = 1; 215 216 ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i)); 217 bind_mode = BIO_BIND_NORMAL; 218 } 219 if (bind(s, res->ai_addr, res->ai_addrlen) == -1) { 220 SYSerror(errno); 221 ERR_asprintf_error_data("host='%s'", host); 222 BIOerror(BIO_R_UNABLE_TO_BIND_SOCKET); 223 goto err; 224 } 225 if (listen(s, SOMAXCONN) == -1) { 226 SYSerror(errno); 227 ERR_asprintf_error_data("host='%s'", host); 228 BIOerror(BIO_R_UNABLE_TO_LISTEN_SOCKET); 229 goto err; 230 } 231 ret = 1; 232 233 err: 234 free(str); 235 freeaddrinfo(res); 236 if ((ret == 0) && (s != -1)) { 237 close(s); 238 s = -1; 239 } 240 return (s); 241 } 242 243 int 244 BIO_accept(int sock, char **addr) 245 { 246 char h[NI_MAXHOST], s[NI_MAXSERV]; 247 struct sockaddr_in sin; 248 socklen_t sin_len = sizeof(sin); 249 int ret = -1; 250 251 if (addr == NULL) 252 goto end; 253 254 ret = accept(sock, (struct sockaddr *)&sin, &sin_len); 255 if (ret == -1) { 256 if (BIO_sock_should_retry(ret)) 257 return -2; 258 SYSerror(errno); 259 BIOerror(BIO_R_ACCEPT_ERROR); 260 goto end; 261 } 262 /* XXX Crazy API. Can't be helped */ 263 if (*addr != NULL) { 264 free(*addr); 265 *addr = NULL; 266 } 267 268 if (sin.sin_family != AF_INET) 269 goto end; 270 271 if (getnameinfo((struct sockaddr *)&sin, sin_len, h, sizeof(h), 272 s, sizeof(s), NI_NUMERICHOST|NI_NUMERICSERV) != 0) 273 goto end; 274 275 if ((asprintf(addr, "%s:%s", h, s)) == -1) { 276 BIOerror(ERR_R_MALLOC_FAILURE); 277 *addr = NULL; 278 goto end; 279 } 280 end: 281 return (ret); 282 } 283 284 int 285 BIO_set_tcp_ndelay(int s, int on) 286 { 287 return (setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) == 0); 288 } 289