]>
Commit | Line | Data |
---|---|---|
8b4a9693 PF |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright (C) 2013 Intel Corporation. All rights reserved. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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/>. | |
18 | ***/ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <sys/types.h> | |
22 | #include <sys/socket.h> | |
23 | #include <string.h> | |
24 | #include <linux/if_packet.h> | |
25 | #include <net/ethernet.h> | |
26 | #include <stdio.h> | |
27 | #include <unistd.h> | |
28 | ||
29 | #include "socket-util.h" | |
30 | ||
31 | #include "dhcp-internal.h" | |
32 | ||
33 | int dhcp_network_send_raw_packet(int index, const void *packet, size_t len) | |
34 | { | |
35 | _cleanup_close_ int s; | |
36 | union sockaddr_union link = {}; | |
37 | ||
38 | s = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, htons(ETH_P_IP)); | |
39 | if (s < 0) | |
40 | return -errno; | |
41 | ||
42 | link.ll.sll_family = AF_PACKET; | |
43 | link.ll.sll_protocol = htons(ETH_P_IP); | |
44 | link.ll.sll_ifindex = index; | |
45 | link.ll.sll_halen = ETH_ALEN; | |
46 | memset(&link.ll.sll_addr, 0xff, ETH_ALEN); | |
47 | ||
48 | if (bind(s, &link.sa, sizeof(link.ll)) < 0) | |
49 | return -errno; | |
50 | ||
51 | if (sendto(s, packet, len, 0, &link.sa, sizeof(link.ll)) < 0) | |
52 | return -errno; | |
53 | ||
54 | return 0; | |
55 | } |