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已经可以检测到MPLS

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This commit is contained in:
tsosunchia
2023-10-05 04:30:09 +08:00
parent 7b145f4e64
commit db9b3fed9a
1 changed files with 22 additions and 0 deletions
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22
trace/icmp_ipv4.go
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@@ -175,6 +175,28 @@ func (t *ICMPTracer) listenICMP() {
func (t *ICMPTracer) handleICMPMessage(msg ReceivedMessage, icmpType int8, data []byte, ttl int) {
t.inflightRequestRWLock.RLock()
defer t.inflightRequestRWLock.RUnlock()
extensionOffset := 20 + 8 + 52
if len(data) > extensionOffset {
extensionBody := data[extensionOffset:]
if len(extensionBody) >= 8 && len(extensionBody)%8 == 0 {
log.Println("ICMP Multi-Part Extensions detected for TTL:", ttl)
//TODO: Parse MPLS extensions
//for i := 0; i < len(extensionBody); i += 4 {
// labelData := binary.BigEndian.Uint32(extensionBody[i : i+4])
//
// label := (labelData & 0xFFFFF000) >> 12
// tc := (labelData & 0x00000E00) >> 9
// s := (labelData & 0x00000100) >> 8
// mplsTTL := labelData & 0x000000FF
//
// log.Printf("MPLS for TTL %d: Lbl %d TC %d S %d TTL %d\n", ttl, label, tc, s, mplsTTL)
//}
}
}
if _, ok := t.inflightRequest[ttl]; ok {
t.inflightRequest[ttl] <- Hop{
Success: true,