Daan De Meyer
5cdf13c70c
For libsystemd's headers, the changes made depend on whether the header is installed or not. For installed headers, the only change made is that commonly included headers were moved to _sd-common.h. For these headers, there should be no noticeable change in behavior when including them. For non-installed headers, includes were replaced with forward declarations where possible as usual. Split out of #37344.
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/***
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Copyright © 2014 Intel Corporation. All rights reserved.
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***/
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#include <netinet/in.h>
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#include <stdio.h>
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#include <string.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 ifindex, const 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_addr = *ASSERT_PTR(local_address),
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.in6.sin6_port = htobe16(DHCP6_PORT_CLIENT),
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.in6.sin6_scope_id = ifindex,
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};
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_cleanup_close_ int s = -EBADF;
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int r;
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assert(ifindex > 0);
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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_int(s, IPPROTO_IPV6, IPV6_V6ONLY, true);
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if (r < 0)
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return r;
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r = setsockopt_int(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, false);
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if (r < 0)
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return r;
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r = setsockopt_int(s, SOL_SOCKET, SO_REUSEADDR, true);
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if (r < 0)
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return r;
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r = setsockopt_int(s, SOL_SOCKET, SO_TIMESTAMP, true);
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if (r < 0)
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return r;
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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, const struct in6_addr *server_address, 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_addr = *ASSERT_PTR(server_address),
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.in6.sin6_port = htobe16(DHCP6_PORT_SERVER),
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};
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if (sendto(s, packet, len, 0, &dest.sa, sizeof(dest.in6)) < 0)
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return -errno;
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return 0;
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}
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