2 This file is part of systemd.
4 Copyright (C) 2013 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 <sys/types.h>
22 #include <sys/socket.h>
24 #include <linux/if_packet.h>
25 #include <net/ethernet.h>
29 #include "socket-util.h"
31 #include "dhcp-internal.h"
33 int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link)
40 s = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
45 link->ll.sll_family = AF_PACKET;
46 link->ll.sll_protocol = htons(ETH_P_IP);
47 link->ll.sll_ifindex = index;
48 link->ll.sll_halen = ETH_ALEN;
49 memset(link->ll.sll_addr, 0xff, ETH_ALEN);
51 if (bind(s, &link->sa, sizeof(link->ll)) < 0) {
52 close_nointr_nofail(s);
59 int dhcp_network_bind_udp_socket(int index, be32_t address, uint16_t port)
62 union sockaddr_union src = {
63 .in.sin_family = AF_INET,
64 .in.sin_port = htobe16(port),
65 .in.sin_addr.s_addr = address,
68 s = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0);
72 if (bind(s, &src.sa, sizeof(src.in)) < 0) {
73 close_nointr_nofail(s);
80 int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
81 const void *packet, size_t len)
87 if (sendto(s, packet, len, 0, &link->sa, sizeof(link->ll)) < 0)
93 int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port,
94 const void *packet, size_t len)
96 union sockaddr_union dest = {
97 .in.sin_family = AF_INET,
98 .in.sin_port = htobe16(port),
99 .in.sin_addr.s_addr = address,
102 if (sendto(s, packet, len, 0, &dest.sa, sizeof(dest.in)) < 0)