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chore: skip TLV end check for LLDP shutdown frame

This commit is contained in:
Siyuan 2025-11-06 15:52:37 +00:00
parent 9f4acce279
commit 03f781f7e1
1 changed files with 4 additions and 4 deletions
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8
internal/lldp/rx.go
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@ -248,14 +248,11 @@ func (l *LLDP) handlePacketLLDP(mac string, raw *layers.LinkLayerDiscovery, info
Source: "lldp", Source: "lldp",
Mac: mac, Mac: mac,
} }
gotEnd := false
ttl := lldpDefaultTTL ttl := lldpDefaultTTL
for _, v := range raw.Values { for _, v := range raw.Values {
switch v.Type { switch v.Type {
case layers.LLDPTLVEnd:
gotEnd = true
case layers.LLDPTLVChassisID: case layers.LLDPTLVChassisID:
n.ChassisID = string(raw.ChassisID.ID) n.ChassisID = string(raw.ChassisID.ID)
n.Values["chassis_id"] = n.ChassisID n.Values["chassis_id"] = n.ChassisID
@ -292,7 +289,10 @@ func (l *LLDP) handlePacketLLDP(mac string, raw *layers.LinkLayerDiscovery, info
} }
} }
if gotEnd || ttl < 1*time.Second { // delete the neighbor if the TTL is less than 1 second
// LLDP shutdown frame should have a TTL of 0 and contains mandatory TLVs only
// but we will simply ignore the TLVs check for now
if ttl < 1*time.Second {
l.deleteNeighbor(n) l.deleteNeighbor(n)
} else { } else {
l.addNeighbor(n, ttl) l.addNeighbor(n, ttl)