1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Socket Address handling for dhcpcd 4 * Copyright (c) 2015-2023 Roy Marples <roy@marples.name> 5 * All rights reserved 6 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef SA_H 30 #define SA_H 31 32 #include <sys/socket.h> 33 #include <netinet/in.h> 34 35 union sa_ss { 36 struct sockaddr sa; 37 struct sockaddr_in sin; 38 struct sockaddr_in6 sin6; 39 }; 40 41 #ifdef BSD 42 #define HAVE_SA_LEN 43 #endif 44 45 /* Allow for a sockaddr_dl being printed too. */ 46 #define INET_MAX_ADDRSTRLEN (20 * 3) 47 48 #ifdef INET 49 #define satosin(sa) ((struct sockaddr_in *)(void *)(sa)) 50 #define satocsin(sa) ((const struct sockaddr_in *)(const void *)(sa)) 51 #endif 52 #ifdef INET6 53 #define satosin6(sa) ((struct sockaddr_in6 *)(void *)(sa)) 54 #define satocsin6(sa) ((const struct sockaddr_in6 *)(const void *)(sa)) 55 #endif 56 57 socklen_t sa_addroffset(const struct sockaddr *sa); 58 socklen_t sa_addrlen(const struct sockaddr *sa); 59 #ifdef HAVE_SA_LEN 60 #define sa_len(sa) ((sa)->sa_len) 61 #else 62 socklen_t sa_len(const struct sockaddr *sa); 63 #endif 64 bool sa_is_unspecified(const struct sockaddr *); 65 bool sa_is_allones(const struct sockaddr *); 66 bool sa_is_loopback(const struct sockaddr *); 67 void *sa_toaddr(struct sockaddr *); 68 int sa_toprefix(const struct sockaddr *); 69 int sa_fromprefix(struct sockaddr *, int); 70 const char *sa_addrtop(const struct sockaddr *, char *, socklen_t); 71 int sa_cmp(const struct sockaddr *, const struct sockaddr *); 72 void sa_in_init(struct sockaddr *, const struct in_addr *); 73 void sa_in6_init(struct sockaddr *, const struct in6_addr *); 74 75 #endif 76