Add SPDX license identifiers to source files under the LGPL

[thirdparty/systemd.git] / src / libsystemd-network / lldp-network.c

diff --git a/src/libsystemd-network/lldp-network.c b/src/libsystemd-network/lldp-network.c
index f031760351f95fcf3e14b2c8c3d6a3d29252acc4..cb3841ef225223ebaf35ab775a7c26b92c552517 100644 (file)
--- a/src/libsystemd-network/lldp-network.c
+++ b/src/libsystemd-network/lldp-network.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /***
   This file is part of systemd.
 
@@ -47,6 +48,13 @@ int lldp_network_bind_raw_socket(int ifindex) {
                 .filter = (struct sock_filter*) filter,
         };
 
+        struct packet_mreq mreq = {
+                .mr_ifindex = ifindex,
+                .mr_type = PACKET_MR_MULTICAST,
+                .mr_alen = ETH_ALEN,
+                .mr_address = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 }
+        };
+
         union sockaddr_union saddrll = {
                 .ll.sll_family = AF_PACKET,
                 .ll.sll_ifindex = ifindex,
@@ -57,7 +65,8 @@ int lldp_network_bind_raw_socket(int ifindex) {
 
         assert(ifindex > 0);
 
-        fd = socket(PF_PACKET, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, htons(ETHERTYPE_LLDP));
+        fd = socket(PF_PACKET, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK,
+                    htobe16(ETHERTYPE_LLDP));
         if (fd < 0)
                 return -errno;
 
@@ -65,6 +74,20 @@ int lldp_network_bind_raw_socket(int ifindex) {
         if (r < 0)
                 return -errno;
 
+        r = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
+        if (r < 0)
+                return -errno;
+
+        mreq.mr_address[ETH_ALEN - 1] = 0x03;
+        r = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
+        if (r < 0)
+                return -errno;
+
+        mreq.mr_address[ETH_ALEN - 1] = 0x0E;
+        r = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
+        if (r < 0)
+                return -errno;
+
         r = bind(fd, &saddrll.sa, sizeof(saddrll.ll));
         if (r < 0)
                 return -errno;