ifconf.h revision 1df2a0fce427fab7754f6ac572cf68cef2e95696
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef fooifconfhfoo
#define fooifconfhfoo
#include <sys/socket.h>
/***
This file is part of nss-myhostname.
Copyright 2008-2011 Lennart Poettering
nss-myhostname is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
nss-myhostname is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with nss-myhostname; If not, see
<http://www.gnu.org/licenses/>.
***/
#include <inttypes.h>
#include <sys/types.h>
#include <assert.h>
struct address {
unsigned char family;
uint8_t address[16];
unsigned char scope;
int ifindex;
};
#define _public_ __attribute__ ((visibility("default")))
#define _hidden_ __attribute__ ((visibility("hidden")))
int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list) _hidden_;
static inline size_t PROTO_ADDRESS_SIZE(int proto) {
assert(proto == AF_INET || proto == AF_INET6);
return proto == AF_INET6 ? 16 : 4;
}
static inline int address_compare(const void *_a, const void *_b) {
const struct address *a = _a, *b = _b;
/* Order lowest scope first, IPv4 before IPv6, lowest interface index first */
if (a->scope < b->scope)
return -1;
if (a->scope > b->scope)
return 1;
if (a->family == AF_INET && b->family == AF_INET6)
return -1;
if (a->family == AF_INET6 && b->family == AF_INET)
return 1;
if (a->ifindex < b->ifindex)
return -1;
if (a->ifindex > b->ifindex)
return 1;
return 0;
}
#endif