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fix: get pod ips from TCP protocol in ip-ip encapsulation #234

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fix: get pod ips from TCP protocol in ip-ip encapsulation #234

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9 changes: 9 additions & 0 deletions producer/producer_sf.go
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Original file line number Diff line number Diff line change
Expand Up @@ -157,6 +157,15 @@ func ParseEthernetHeader(flowMessage *flowmessage.FlowMessage, data []byte, conf
return errors.New(fmt.Sprintf("Unknown EtherType: %v\n", etherType))
} */

// Check if this IPv4 header represents IPIP protocol encapsulation.
// If so, then set srcIP and dstIP from next IPv4 header representing TCP protocol.
if nextHeader == 0x04 { // IPv4 IPIP protocol
nextHeader = data[offset+9]
srcIP = data[offset+12 : offset+16]
dstIP = data[offset+16 : offset+20]
offset += 20
}

for _, configLayer := range GetSFlowConfigLayer(config, 4) {
extracted := GetBytes(data, offset*8+configLayer.Offset, configLayer.Length)
MapCustom(flowMessage, extracted, configLayer.Destination)
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