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author27o <27o@users.noreply.github.com>2017-02-09 10:36:13 +0100
committerLennart Poettering <lennart@poettering.net>2017-02-09 10:36:13 +0100
commit6f844e3a3f97d2b3fce9d37714575177b9ff3f4c (patch)
tree99df0f8efc9a6472bc06510729f3c9295e4e39bc
parent28c78e07aaf34ed0ce3a7472b0504e4cefdedc52 (diff)
networkd: add multicast membership to lldp socket (#5282)
-rw-r--r--src/libsystemd-network/lldp-network.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/libsystemd-network/lldp-network.c b/src/libsystemd-network/lldp-network.c
index 59c25598e9..ae2f6744d5 100644
--- a/src/libsystemd-network/lldp-network.c
+++ b/src/libsystemd-network/lldp-network.c
@@ -47,6 +47,13 @@ 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,
@@ -66,6 +73,20 @@ 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;