1 /* 2 * Socket Address handling for dhcpcd 3 * Copyright (c) 2015-2018 Roy Marples <roy@marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef SA_H 29 #define SA_H 30 31 #include <sys/socket.h> 32 33 union sa_ss { 34 struct sockaddr sa; 35 struct sockaddr_in sin; 36 struct sockaddr_in6 sin6; 37 }; 38 39 #ifdef BSD 40 #define HAVE_SA_LEN 41 #endif 42 43 /* Allow for a sockaddr_dl being printed too. */ 44 #define INET_MAX_ADDRSTRLEN (20 * 3) 45 46 #ifdef INET 47 #define satosin(sa) ((struct sockaddr_in *)(void *)(sa)) 48 #define satocsin(sa) ((const struct sockaddr_in *)(const void *)(sa)) 49 #endif 50 #ifdef INET6 51 #define satosin6(sa) ((struct sockaddr_in6 *)(void *)(sa)) 52 #define satocsin6(sa) ((const struct sockaddr_in6 *)(const void *)(sa)) 53 #endif 54 55 socklen_t sa_addroffset(const struct sockaddr *sa); 56 socklen_t sa_addrlen(const struct sockaddr *sa); 57 bool sa_is_unspecified(const struct sockaddr *); 58 bool sa_is_allones(const struct sockaddr *); 59 bool sa_is_loopback(const struct sockaddr *); 60 void *sa_toaddr(struct sockaddr *); 61 int sa_toprefix(const struct sockaddr *); 62 int sa_fromprefix(struct sockaddr *, int); 63 const char *sa_addrtop(const struct sockaddr *, char *, socklen_t); 64 int sa_cmp(const struct sockaddr *, const struct sockaddr *); 65 void sa_in_init(struct sockaddr *, const struct in_addr *); 66 void sa_in6_init(struct sockaddr *, const struct in6_addr *); 67 68 #endif 69