93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/*
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* Copyright (C) 2015 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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/**
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* @file ifaddrs.h
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* @brief Access to network interface addresses.
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*/
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#include <sys/cdefs.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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__BEGIN_DECLS
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/**
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* Returned by getifaddrs() and freed by freeifaddrs().
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*/
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struct ifaddrs {
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/** Pointer to the next element in the linked list. */
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struct ifaddrs* _Nullable ifa_next;
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/** Interface name. */
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char* _Nullable ifa_name;
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/** Interface flags (like `SIOCGIFFLAGS`). */
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unsigned int ifa_flags;
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/** Interface address. */
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struct sockaddr* _Nullable ifa_addr;
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/** Interface netmask. */
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struct sockaddr* _Nullable ifa_netmask;
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union {
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/** Interface broadcast address (if IFF_BROADCAST is set). */
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struct sockaddr* _Nullable ifu_broadaddr;
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/** Interface destination address (if IFF_POINTOPOINT is set). */
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struct sockaddr* _Nullable ifu_dstaddr;
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} ifa_ifu;
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/** Unused. */
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void* _Nullable ifa_data;
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};
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/** Synonym for `ifa_ifu.ifu_broadaddr` in `struct ifaddrs`. */
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#define ifa_broadaddr ifa_ifu.ifu_broadaddr
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/** Synonym for `ifa_ifu.ifu_dstaddr` in `struct ifaddrs`. */
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#define ifa_dstaddr ifa_ifu.ifu_dstaddr
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/**
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* [getifaddrs(3)](http://man7.org/linux/man-pages/man3/getifaddrs.3.html) creates a linked list
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* of `struct ifaddrs`. The list must be freed by freeifaddrs().
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*
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* Returns 0 and stores the list in `*__list_ptr` on success,
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* and returns -1 and sets `errno` on failure.
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*
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* Available since API level 24.
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*/
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int getifaddrs(struct ifaddrs* _Nullable * _Nonnull __list_ptr) __INTRODUCED_IN(24);
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/**
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* [freeifaddrs(3)](http://man7.org/linux/man-pages/man3/freeifaddrs.3.html) frees a linked list
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* of `struct ifaddrs` returned by getifaddrs().
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*
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* Available since API level 24.
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*/
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void freeifaddrs(struct ifaddrs* _Nullable __ptr) __INTRODUCED_IN(24);
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__END_DECLS
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