]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/libsystemd-network/dhcp6-network.c
2 This file is part of systemd.
4 Copyright (C) 2014 Intel Corporation. All rights reserved.
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
21 #include <netinet/in.h>
22 #include <netinet/ip6.h>
25 #include <sys/socket.h>
26 #include <sys/types.h>
28 #include <linux/if_packet.h>
30 #include "dhcp6-internal.h"
31 #include "dhcp6-protocol.h"
33 #include "socket-util.h"
35 int dhcp6_network_bind_udp_socket(int index
, struct in6_addr
*local_address
) {
36 union sockaddr_union src
= {
37 .in6
.sin6_family
= AF_INET6
,
38 .in6
.sin6_port
= htobe16(DHCP6_PORT_CLIENT
),
39 .in6
.sin6_scope_id
= index
,
41 _cleanup_close_
int s
= -1;
42 int r
, off
= 0, on
= 1;
45 assert(local_address
);
47 src
.in6
.sin6_addr
= *local_address
;
49 s
= socket(AF_INET6
, SOCK_DGRAM
| SOCK_CLOEXEC
| SOCK_NONBLOCK
, IPPROTO_UDP
);
53 r
= setsockopt(s
, IPPROTO_IPV6
, IPV6_V6ONLY
, &on
, sizeof(on
));
57 r
= setsockopt(s
, IPPROTO_IPV6
, IPV6_MULTICAST_LOOP
, &off
, sizeof(off
));
61 r
= setsockopt(s
, SOL_SOCKET
, SO_REUSEADDR
, &on
, sizeof(on
));
65 r
= bind(s
, &src
.sa
, sizeof(src
.in6
));
74 int dhcp6_network_send_udp_socket(int s
, struct in6_addr
*server_address
,
75 const void *packet
, size_t len
) {
76 union sockaddr_union dest
= {
77 .in6
.sin6_family
= AF_INET6
,
78 .in6
.sin6_port
= htobe16(DHCP6_PORT_SERVER
),
82 assert(server_address
);
84 memcpy(&dest
.in6
.sin6_addr
, server_address
, sizeof(dest
.in6
.sin6_addr
));
86 r
= sendto(s
, packet
, len
, 0, &dest
.sa
, sizeof(dest
.in6
));