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sd-lldp-rx: add comments about the three multicast addresses

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This commit is contained in:
Yu Watanabe 2021-09-28 15:01:06 +09:00
parent b5dce07a5e
commit e9ea43136c
1 changed files with 3 additions and 0 deletions
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3
src/libsystemd-network/lldp-network.c
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@ -56,15 +56,18 @@ int lldp_network_bind_raw_socket(int ifindex) {
if (r < 0)
return -errno;
/* customer bridge */
r = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
if (r < 0)
return -errno;
/* non TPMR bridge */
mreq.mr_address[ETH_ALEN - 1] = 0x03;
r = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
if (r < 0)
return -errno;
/* nearest bridge */
mreq.mr_address[ETH_ALEN - 1] = 0x0E;
r = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
if (r < 0)