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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2008-2011 Lennart Poettering
Copyright 2014 Tom Gundersen
systemd 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.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "sd-rtnl.h"
#include "rtnl-util.h"
#include "macro.h"
#include "ifconf.h"
int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list) {
_cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
sd_rtnl_message *m;
_cleanup_free_ struct address *list = NULL;
struct address *new_list = NULL;
unsigned n_list = 0;
int r;
r = sd_rtnl_open(&rtnl, 0);
if (r < 0)
return r;
r = sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);
if (r < 0)
return r;
r = sd_rtnl_call(rtnl, req, 0, &reply);
if (r < 0)
return r;
m = reply;
do {
uint16_t type;
unsigned char scope;
unsigned char flags;
unsigned char family;
int ifindex;
union {
struct in_addr in;
struct in6_addr in6;
} address;
r = sd_rtnl_message_get_errno(m);
if (r < 0)
return r;
r = sd_rtnl_message_get_type(m, &type);
if (r < 0)
return r;
if (type != RTM_NEWADDR)
continue;
r = sd_rtnl_message_addr_get_scope(m, &scope);
if (r < 0)
return r;
if (scope == RT_SCOPE_HOST || scope == RT_SCOPE_NOWHERE)
continue;
r = sd_rtnl_message_addr_get_flags(m, &flags);
if (r < 0)
return r;
if (flags & IFA_F_DEPRECATED)
continue;
r = sd_rtnl_message_addr_get_family(m, &family);
if (r < 0)
return r;
switch (family) {
case AF_INET:
r = sd_rtnl_message_read_in_addr(m, IFA_LOCAL, &address.in);
if (r < 0) {
r = sd_rtnl_message_read_in_addr(m, IFA_ADDRESS, &address.in);
if (r < 0)
continue;
}
break;
case AF_INET6:
r = sd_rtnl_message_read_in6_addr(m, IFA_LOCAL, &address.in6);
if (r < 0) {
r = sd_rtnl_message_read_in6_addr(m, IFA_ADDRESS, &address.in6);
if (r < 0)
continue;
}
break;
default:
continue;
}
r = sd_rtnl_message_addr_get_ifindex(m, &ifindex);
if (r < 0)
return r;
new_list = realloc(list, (n_list+1) * sizeof(struct address));
if (!new_list)
return -ENOMEM;
else
list = new_list;
assert_cc(sizeof(address) <= 16);
list[n_list].family = family;
list[n_list].scope = scope;
memcpy(list[n_list].address, &address, sizeof(address));
list[n_list].ifindex = ifindex;
n_list++;
} while ((m = sd_rtnl_message_next(m)));
if (n_list)
qsort(list, n_list, sizeof(struct address), address_compare);
*_n_list = n_list;
*_list = list;
list = NULL;
return 0;
}
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