1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2022 Sebastian Wiedenroth 24 */ 25 #ifndef _IFADDRS_H 26 #define _IFADDRS_H 27 28 #ifdef __cplusplus 29 extern "C" { 30 #endif 31 32 #include <sys/types.h> 33 34 /* 35 * The `getifaddrs' function generates a linked list of these structures. 36 * Each element of the list describes one network interface. 37 */ 38 #if defined(_INT64_TYPE) 39 struct ifaddrs { 40 struct ifaddrs *ifa_next; /* Pointer to the next structure. */ 41 char *ifa_name; /* Name of this network interface. */ 42 uint64_t ifa_flags; /* Flags as from SIOCGLIFFLAGS ioctl. */ 43 struct sockaddr *ifa_addr; /* Network address of this interface. */ 44 struct sockaddr *ifa_netmask; /* Netmask of this interface. */ 45 union { 46 /* 47 * At most one of the following two is valid. If the 48 * IFF_BROADCAST bit is set in `ifa_flags', then 49 * `ifa_broadaddr' is valid. If the IFF_POINTOPOINT bit is 50 * set, then `ifa_dstaddr' is valid. It is never the case that 51 * both these bits are set at once. 52 */ 53 struct sockaddr *ifu_broadaddr; 54 struct sockaddr *ifu_dstaddr; 55 } ifa_ifu; 56 void *ifa_data; /* Address-specific data (may be unused). */ 57 /* 58 * This may have been defined in <net/if.h>. 59 */ 60 #ifndef ifa_broadaddr 61 #define ifa_broadaddr ifa_ifu.ifu_broadaddr /* broadcast address */ 62 #endif 63 #ifndef ifa_dstaddr 64 #define ifa_dstaddr ifa_ifu.ifu_dstaddr /* other end of p-to-p link */ 65 #endif 66 }; 67 #endif 68 69 #ifdef __PRAGMA_REDEFINE_EXTNAME 70 #pragma redefine_extname getifaddrs __getifaddrs 71 #else 72 extern int __getifaddrs(struct ifaddrs **); 73 #define getifaddrs __getifaddrs 74 #endif 75 76 /* 77 * Create a linked list of `struct ifaddrs' structures, one for each 78 * network interface on the host machine. If successful, store the 79 * list in *ifap and return 0. On errors, return -1 and set `errno'. 80 * 81 * The storage returned in *ifap is allocated dynamically and can 82 * only be properly freed by passing it to `freeifaddrs'. 83 */ 84 extern int getifaddrs(struct ifaddrs **); 85 86 /* Reclaim the storage allocated by a previous `getifaddrs' call. */ 87 extern void freeifaddrs(struct ifaddrs *); 88 89 90 #ifdef __cplusplus 91 } 92 #endif 93 94 #endif /* _IFADDRS_H */ 95