+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- This file is part of systemd.
-
- Copyright (C) 2014 Intel Corporation. All rights reserved.
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
+ Copyright © 2014 Intel Corporation. All rights reserved.
***/
#include <errno.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <string.h>
-#include <linux/if_packet.h>
+#include <netinet/in.h>
+#include <netinet/ip6.h>
#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
#include <unistd.h>
-#include <netinet/ip6.h>
-#include <netinet/icmp6.h>
-#include <netinet/in.h>
-
-#include "socket-util.h"
+#include <linux/if_packet.h>
#include "dhcp6-internal.h"
#include "dhcp6-protocol.h"
-
-#define IN6ADDR_ALL_ROUTERS_MULTICAST_INIT \
- { { { 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 } } }
-
-#define IN6ADDR_ALL_NODES_MULTICAST_INIT \
- { { { 0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } } }
-
-int dhcp_network_icmp6_bind_router_solicitation(int index) {
- struct icmp6_filter filter = { };
- struct ipv6_mreq mreq = {
- .ipv6mr_multiaddr = IN6ADDR_ALL_NODES_MULTICAST_INIT,
- .ipv6mr_interface = index,
- };
- _cleanup_close_ int s = -1;
- int r, zero = 0, hops = 255;
-
- s = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK,
- IPPROTO_ICMPV6);
- if (s < 0)
- return -errno;
-
- ICMP6_FILTER_SETBLOCKALL(&filter);
- ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filter);
- r = setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
- sizeof(filter));
- if (r < 0)
- return -errno;
-
- /* RFC 3315, section 6.7, bullet point 2 may indicate that an
- IPV6_PKTINFO socket option also applies for ICMPv6 multicast.
- Empirical experiments indicates otherwise and therefore an
- IPV6_MULTICAST_IF socket option is used here instead */
- r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_IF, &index,
- sizeof(index));
- if (r < 0)
- return -errno;
-
- r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &zero,
- sizeof(zero));
- if (r < 0)
- return -errno;
-
- r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hops,
- sizeof(hops));
- if (r < 0)
- return -errno;
-
- r = setsockopt(s, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq,
- sizeof(mreq));
- if (r < 0)
- return -errno;
-
- r = s;
- s = -1;
- return r;
-}
-
-int dhcp_network_icmp6_send_router_solicitation(int s, const struct ether_addr *ether_addr) {
- struct sockaddr_in6 dst = {
- .sin6_family = AF_INET6,
- .sin6_addr = IN6ADDR_ALL_ROUTERS_MULTICAST_INIT,
- };
- struct {
- struct nd_router_solicit rs;
- struct nd_opt_hdr rs_opt;
- struct ether_addr rs_opt_mac;
- } _packed_ rs = {
- .rs.nd_rs_type = ND_ROUTER_SOLICIT,
- };
- struct iovec iov[1] = {
- { &rs, },
- };
- struct msghdr msg = {
- .msg_name = &dst,
- .msg_namelen = sizeof(dst),
- .msg_iov = iov,
- .msg_iovlen = 1,
- };
- int r;
-
- if (ether_addr) {
- memcpy(&rs.rs_opt_mac, ether_addr, ETH_ALEN);
- rs.rs_opt.nd_opt_type = ND_OPT_SOURCE_LINKADDR;
- rs.rs_opt.nd_opt_len = 1;
- iov[0].iov_len = sizeof(rs);
- } else
- iov[0].iov_len = sizeof(rs.rs);
-
- r = sendmsg(s, &msg, 0);
- if (r < 0)
- return -errno;
-
- return 0;
-}
+#include "fd-util.h"
+#include "socket-util.h"
int dhcp6_network_bind_udp_socket(int index, struct in6_addr *local_address) {
- struct in6_pktinfo pktinfo = {
- .ipi6_ifindex = index,
- };
union sockaddr_union src = {
.in6.sin6_family = AF_INET6,
.in6.sin6_port = htobe16(DHCP6_PORT_CLIENT),
- .in6.sin6_addr = IN6ADDR_ANY_INIT,
+ .in6.sin6_scope_id = index,
};
_cleanup_close_ int s = -1;
- int r, off = 0, on = 1;
+ int r;
+
+ assert(index > 0);
+ assert(local_address);
- if (local_address)
- memcpy(&src.in6.sin6_addr, local_address,
- sizeof(src.in6.sin6_addr));
+ src.in6.sin6_addr = *local_address;
- s = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
- IPPROTO_UDP);
+ s = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_UDP);
if (s < 0)
return -errno;
- r = setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &pktinfo,
- sizeof(pktinfo));
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_V6ONLY, true);
if (r < 0)
- return -errno;
+ return r;
- r = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
+ r = setsockopt_int(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, false);
if (r < 0)
- return -errno;
+ return r;
- r = setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &off, sizeof(off));
+ r = setsockopt_int(s, SOL_SOCKET, SO_REUSEADDR, true);
if (r < 0)
- return -errno;
+ return r;
r = bind(s, &src.sa, sizeof(src.in6));
if (r < 0)
return -errno;
- r = s;
- s = -1;
- return r;
+ return TAKE_FD(s);
}
int dhcp6_network_send_udp_socket(int s, struct in6_addr *server_address,
projects / thirdparty / systemd.git / blobdiff