11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright (C) 2014 Intel Corporation. All rights reserved.
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***/
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#include <errno.h>
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#include <netinet/in.h>
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#include <netinet/ip6.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <linux/if_packet.h>
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#include "dhcp6-internal.h"
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#include "dhcp6-protocol.h"
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#include "fd-util.h"
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#include "socket-util.h"
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int dhcp6_network_bind_udp_socket(int index, struct in6_addr *local_address) {
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union sockaddr_union src = {
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.in6.sin6_family = AF_INET6,
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.in6.sin6_port = htobe16(DHCP6_PORT_CLIENT),
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.in6.sin6_scope_id = index,
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};
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_cleanup_close_ int s = -1;
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int r, off = 0, on = 1;
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assert(index > 0);
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assert(local_address);
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src.in6.sin6_addr = *local_address;
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s = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_UDP);
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if (s < 0)
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return -errno;
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r = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
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if (r < 0)
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return -errno;
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r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &off, sizeof(off));
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if (r < 0)
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return -errno;
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r = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
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if (r < 0)
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return -errno;
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r = bind(s, &src.sa, sizeof(src.in6));
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if (r < 0)
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return -errno;
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return TAKE_FD(s);
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}
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int dhcp6_network_send_udp_socket(int s, struct in6_addr *server_address,
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const void *packet, size_t len) {
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union sockaddr_union dest = {
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.in6.sin6_family = AF_INET6,
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.in6.sin6_port = htobe16(DHCP6_PORT_SERVER),
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};
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int r;
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assert(server_address);
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memcpy(&dest.in6.sin6_addr, server_address, sizeof(dest.in6.sin6_addr));
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r = sendto(s, packet, len, 0, &dest.sa, sizeof(dest.in6));
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if (r < 0)
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return -errno;
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return 0;
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}
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