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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
e3169126 | 2 | /*** |
810adae9 | 3 | Copyright © 2014 Intel Corporation. All rights reserved. |
e3169126 PF |
4 | ***/ |
5 | ||
6 | #include <errno.h> | |
3ffd4af2 LP |
7 | #include <netinet/in.h> |
8 | #include <netinet/ip6.h> | |
e3169126 | 9 | #include <stdio.h> |
3ffd4af2 | 10 | #include <string.h> |
3ffd4af2 | 11 | #include <sys/types.h> |
e3169126 | 12 | #include <unistd.h> |
3ffd4af2 | 13 | #include <linux/if_packet.h> |
e3169126 PF |
14 | |
15 | #include "dhcp6-internal.h" | |
34e8c5a2 | 16 | #include "dhcp6-protocol.h" |
3ffd4af2 LP |
17 | #include "fd-util.h" |
18 | #include "socket-util.h" | |
e3169126 | 19 | |
1a6c9136 | 20 | int dhcp6_network_bind_udp_socket(int ifindex, struct in6_addr *local_address) { |
34e8c5a2 PF |
21 | union sockaddr_union src = { |
22 | .in6.sin6_family = AF_INET6, | |
23 | .in6.sin6_port = htobe16(DHCP6_PORT_CLIENT), | |
1a6c9136 | 24 | .in6.sin6_scope_id = ifindex, |
34e8c5a2 | 25 | }; |
5bb1d7fb | 26 | _cleanup_close_ int s = -EBADF; |
6d5e65f6 | 27 | int r; |
34e8c5a2 | 28 | |
1a6c9136 | 29 | assert(ifindex > 0); |
c601ebf7 TG |
30 | assert(local_address); |
31 | ||
32 | src.in6.sin6_addr = *local_address; | |
34e8c5a2 | 33 | |
6506063f | 34 | s = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_UDP); |
34e8c5a2 PF |
35 | if (s < 0) |
36 | return -errno; | |
37 | ||
2ff48e98 | 38 | r = setsockopt_int(s, IPPROTO_IPV6, IPV6_V6ONLY, true); |
34e8c5a2 | 39 | if (r < 0) |
2ff48e98 | 40 | return r; |
34e8c5a2 | 41 | |
2ff48e98 | 42 | r = setsockopt_int(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, false); |
34e8c5a2 | 43 | if (r < 0) |
2ff48e98 | 44 | return r; |
34e8c5a2 | 45 | |
2ff48e98 | 46 | r = setsockopt_int(s, SOL_SOCKET, SO_REUSEADDR, true); |
6506063f | 47 | if (r < 0) |
2ff48e98 | 48 | return r; |
6506063f | 49 | |
653ddc1d YW |
50 | r = setsockopt_int(s, SOL_SOCKET, SO_TIMESTAMP, true); |
51 | if (r < 0) | |
52 | return r; | |
53 | ||
34e8c5a2 PF |
54 | r = bind(s, &src.sa, sizeof(src.in6)); |
55 | if (r < 0) | |
56 | return -errno; | |
57 | ||
c10d6bdb | 58 | return TAKE_FD(s); |
34e8c5a2 PF |
59 | } |
60 | ||
61 | int dhcp6_network_send_udp_socket(int s, struct in6_addr *server_address, | |
62 | const void *packet, size_t len) { | |
63 | union sockaddr_union dest = { | |
64 | .in6.sin6_family = AF_INET6, | |
65 | .in6.sin6_port = htobe16(DHCP6_PORT_SERVER), | |
66 | }; | |
67 | int r; | |
68 | ||
69 | assert(server_address); | |
70 | ||
71 | memcpy(&dest.in6.sin6_addr, server_address, sizeof(dest.in6.sin6_addr)); | |
72 | ||
73 | r = sendto(s, packet, len, 0, &dest.sa, sizeof(dest.in6)); | |
74 | if (r < 0) | |
75 | return -errno; | |
76 | ||
77 | return 0; | |
78 | } |