]>
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 | ||
8c00042c | 33 | int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link) |
1c8035a8 | 34 | { |
8c00042c | 35 | int s; |
8b4a9693 | 36 | |
23f30ed3 TG |
37 | assert(index > 0); |
38 | assert(link); | |
39 | ||
8c00042c PF |
40 | s = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, |
41 | htons(ETH_P_IP)); | |
8b4a9693 PF |
42 | if (s < 0) |
43 | return -errno; | |
44 | ||
8c00042c PF |
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); | |
8b4a9693 | 50 | |
8c00042c | 51 | if (bind(s, &link->sa, sizeof(link->ll)) < 0) { |
1c8035a8 | 52 | close_nointr_nofail(s); |
8b4a9693 | 53 | return -errno; |
8c00042c | 54 | } |
8b4a9693 | 55 | |
8c00042c PF |
56 | return s; |
57 | } | |
58 | ||
234fc2df PF |
59 | int dhcp_network_bind_udp_socket(int index, be32_t client_address) |
60 | { | |
61 | int s; | |
62 | union sockaddr_union src = { | |
63 | .in.sin_family = AF_INET, | |
64 | .in.sin_port = htobe16(DHCP_PORT_CLIENT), | |
65 | .in.sin_addr.s_addr = client_address, | |
66 | }; | |
67 | ||
68 | s = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0); | |
69 | if (s < 0) | |
70 | return -errno; | |
71 | ||
72 | if (bind(s, &src.sa, sizeof(src.in)) < 0) { | |
73 | close_nointr_nofail(s); | |
74 | return -errno; | |
75 | } | |
76 | ||
77 | return s; | |
78 | } | |
79 | ||
8c00042c PF |
80 | int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link, |
81 | const void *packet, size_t len) | |
82 | { | |
23f30ed3 TG |
83 | assert(link); |
84 | assert(packet); | |
85 | assert(len); | |
86 | ||
8c00042c | 87 | if (sendto(s, packet, len, 0, &link->sa, sizeof(link->ll)) < 0) |
1c8035a8 | 88 | return -errno; |
8b4a9693 | 89 | |
1c8035a8 | 90 | return 0; |
8b4a9693 | 91 | } |
234fc2df PF |
92 | |
93 | int dhcp_network_send_udp_socket(int s, be32_t server_address, | |
94 | const void *packet, size_t len) | |
95 | { | |
96 | union sockaddr_union dest = { | |
97 | .in.sin_family = AF_INET, | |
98 | .in.sin_port = htobe16(DHCP_PORT_SERVER), | |
99 | .in.sin_addr.s_addr = server_address, | |
100 | }; | |
101 | ||
102 | if (sendto(s, packet, len, 0, &dest.sa, sizeof(dest.in)) < 0) | |
103 | return -errno; | |
104 | ||
105 | return 0; | |
106 | } |