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// Copyright © 2024 Peter Haag peter@people.ops-trust.net
// All rights reserved.
//
// Use of this source code is governed by the license that can be
// found in the LICENSE file.
package nfdump
import (
"fmt"
"time"
)
func flagsString(flags uint16) string {
var flagChars = []byte{'.', '.', '.', '.', '.', '.', '.', '.'}
// Congestion window reduced - CWR
if flags&128 != 0 {
flagChars[0] = 'C'
}
// ECN-Echo
if flags&64 != 0 {
flagChars[1] = 'E'
}
// Urgent
if flags&32 != 0 {
flagChars[2] = 'U'
}
// Ack
if flags&16 != 0 {
flagChars[3] = 'A'
}
// Push
if flags&8 != 0 {
flagChars[4] = 'P'
}
// Reset
if flags&4 != 0 {
flagChars[5] = 'R'
}
// Syn
if flags&2 != 0 {
flagChars[6] = 'S'
}
// Fin
if flags&1 != 0 {
flagChars[7] = 'F'
}
return string(flagChars)
} // End of FlagsString
// Return string for %v Printf()
func (flowRecord *FlowRecordV3) String() string {
var flowType string
if flowRecord.recordHeader.Nfversion != 0 {
if flowRecord.recordHeader.Nfversion&0x80 != 0 {
flowType = "SFLOW"
} else if flowRecord.recordHeader.Nfversion&0x40 != 0 {
flowType = "PCAP"
} else {
flowType = "NETFLOW"
}
} else {
flowType = "FLOW"
}
var recordFlags string
recordFlags = ""
if flowRecord.recordHeader.Flags&uint8(V3_FLAG_EVENT) != 0 {
recordFlags += " Event"
}
if flowRecord.recordHeader.Flags&uint8(V3_FLAG_SAMPLED) != 0 {
recordFlags += " Sampled"
}
if flowRecord.recordHeader.Flags&uint8(V3_FLAG_ANON) != 0 {
recordFlags += " Anon"
}
var s string = "Flow Record:\n" +
fmt.Sprintf(" Flags : %v %s%s\n", flowRecord.recordHeader.Flags, flowType, recordFlags) +
fmt.Sprintf(" Elements : %v\n", flowRecord.recordHeader.NumElements) +
fmt.Sprintf(" Size : %v\n", flowRecord.recordHeader.Size) +
fmt.Sprintf(" EngineType : %v\n", flowRecord.recordHeader.EngineType) +
fmt.Sprintf(" EngineID : %v\n", flowRecord.recordHeader.EngineID) +
fmt.Sprintf(" ExporterID : %v\n", flowRecord.recordHeader.ExporterID) +
fmt.Sprintf(" Netflow : %v\n", flowRecord.recordHeader.Nfversion)
s += flowRecord.dumpEXgenericFlow()
s += fmt.Sprintf(" SrcIP : %v\n DstIP : %v\n", flowRecord.srcIP, flowRecord.dstIP)
s += flowRecord.dumpEXsampling()
s += flowRecord.dumpEXflowMisc()
s += flowRecord.dumpEXcntFlow()
s += flowRecord.dumpEXvLan()
s += flowRecord.dumpEXasRouting()
s += flowRecord.dumpEXbgpNextHop()
s += flowRecord.dumpEXipNextHop()
s += flowRecord.dumpEXnatCommon()
s += flowRecord.dumpEXnatXlateIP()
s += flowRecord.dumpEXnatXlatePort()
s += flowRecord.dumpEXnatPortBlock()
s += flowRecord.dumpEXipReceived()
s += flowRecord.dumpEXflowId()
s += flowRecord.dumpEXnokiaNAT()
s += flowRecord.dumpEXnokiaNatString()
s += flowRecord.dumpEXipInfoString()
return s
}
func (flowRecord *FlowRecordV3) dumpEXgenericFlow() string {
var genericFlow *EXgenericFlow
if genericFlow = flowRecord.GenericFlow(); genericFlow == nil {
return ""
}
var s string = ""
tTime := time.UnixMilli(int64(genericFlow.MsecFirst))
s += fmt.Sprintf(" First : %d %v\n", genericFlow.MsecFirst, tTime)
tTime = time.UnixMilli(int64(genericFlow.MsecLast))
s += fmt.Sprintf(" Last : %d %v\n", genericFlow.MsecLast, tTime)
tTime = time.UnixMilli(int64(genericFlow.MsecReceived))
tcpFlags := genericFlow.TcpFlags
if genericFlow.Proto != 6 {
tcpFlags = 0
}
s += fmt.Sprintf(" Received : %d %v\n", genericFlow.MsecReceived, tTime) +
fmt.Sprintf(" In Packets : %d\n", genericFlow.InPackets) +
fmt.Sprintf(" In Bytes : %d\n", genericFlow.InBytes) +
fmt.Sprintf(" Proto : %d\n", genericFlow.Proto) +
fmt.Sprintf(" SrcPort : %d\n", genericFlow.SrcPort) +
fmt.Sprintf(" DstPort : %d\n", genericFlow.DstPort) +
fmt.Sprintf(" TcpFlags : 0x%x %s\n", tcpFlags, flagsString(uint16(tcpFlags))) +
fmt.Sprintf(" FwdStatus : %d\n", genericFlow.FwdStatus) +
fmt.Sprintf(" SrcTos : %d\n", genericFlow.SrcTos)
return s
}
func (flowRecord *FlowRecordV3) dumpEXsampling() string {
var sampling *EXsamplerInfo
if sampling = flowRecord.Sampling(); sampling != nil {
var s string = fmt.Sprintf(" SamplingID : %d\n", sampling.SelectorID) +
fmt.Sprintf(" ExporterID : %d\n", sampling.Sysid)
return s
} else {
return ""
}
}
func (flowRecord *FlowRecordV3) dumpEXflowMisc() string {
var flowMisc *EXflowMisc
if flowMisc = flowRecord.FlowMisc(); flowMisc == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" Input : %v\n", flowMisc.Input) +
fmt.Sprintf(" Output : %v\n", flowMisc.Output) +
fmt.Sprintf(" SrcMask : %v\n", flowMisc.SrcMask) +
fmt.Sprintf(" DstMask : %v\n", flowMisc.DstMask) +
fmt.Sprintf(" Direction : %v\n", flowMisc.Dir) +
fmt.Sprintf(" DstTos : %v\n", flowMisc.DstTos) +
fmt.Sprintf(" BiFlowDir : %v\n", flowMisc.BiFlowDir) +
fmt.Sprintf(" EndReason : %v\n", flowMisc.FlowEndReason)
return s
}
func (flowRecord *FlowRecordV3) dumpEXcntFlow() string {
var cntFlow *EXcntFlow
if cntFlow = flowRecord.CntFlow(); cntFlow == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" Out Packets : %d\n", cntFlow.OutPackets) +
fmt.Sprintf(" Out Bytes : %d\n", cntFlow.OutBytes) +
fmt.Sprintf(" Aggr Flows : %d\n", cntFlow.Flows)
return s
}
func (flowRecord *FlowRecordV3) dumpEXvLan() string {
var vLan *EXvLan
if vLan = flowRecord.VLan(); vLan == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" Src Vlan : %d\n", vLan.SrcVlan) +
fmt.Sprintf(" Dst Vlan : %d\n", vLan.DstVlan)
return s
}
func (flowRecord *FlowRecordV3) dumpEXasRouting() string {
var asRouting *EXasRouting
if asRouting = flowRecord.AsRouting(); asRouting == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" Src AS : %d\n", asRouting.SrcAS) +
fmt.Sprintf(" Dst AS : %d\n", asRouting.DstAS)
return s
}
func (flowRecord *FlowRecordV3) dumpEXbgpNextHop() string {
var nextHop *EXbgpNextHop
if nextHop = flowRecord.BgpNextHop(); nextHop == nil {
return ""
}
return fmt.Sprintf(" Bgp next hop: %v\n", nextHop.IP)
}
func (flowRecord *FlowRecordV3) dumpEXipNextHop() string {
var nextHop *EXipNextHop
if nextHop = flowRecord.IpNextHop(); nextHop == nil {
return ""
}
return fmt.Sprintf(" IP next hop : %v\n", nextHop.IP)
}
func (flowRecord *FlowRecordV3) dumpEXnatXlateIP() string {
var natXlateIP = flowRecord.NatXlateIP()
if !flowRecord.hasXlateIP {
return ""
}
var s string = "" +
// when printing as %v, Golang takes care about proper formating
// as IPv4 or IPv6
// see Golang standard library net.IP for more details to process IPs
fmt.Sprintf(" NAT Src X-IP: %v\n", natXlateIP.SrcXIP) +
fmt.Sprintf(" NAT Dst X-IP: %v\n", natXlateIP.DstXIP)
return s
}
func (flowRecord *FlowRecordV3) dumpEXnatXlatePort() string {
var xlatePort *EXnatXlatePort
if xlatePort = flowRecord.NatXlatePort(); xlatePort == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" NAT SrcXPort: %d\n", xlatePort.XlateSrcPort) +
fmt.Sprintf(" NAT DstXPort: %d\n", xlatePort.XlateDstPort)
return s
}
func (flowRecord *FlowRecordV3) dumpEXnatCommon() string {
var natCommon *EXnatCommon
if natCommon = flowRecord.NatCommon(); natCommon == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" NAT Event : %d\n", natCommon.NatEvent) +
fmt.Sprintf(" NAT PoolID : %d\n", natCommon.NatPoolID)
return s
}
func (flowRecord *FlowRecordV3) dumpEXnatPortBlock() string {
var natPortBlock *EXnatPortBlock
if natPortBlock = flowRecord.NatPortBlock(); natPortBlock == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" NAT pstart : %d\n", natPortBlock.BlockStart) +
fmt.Sprintf(" NAT pend : %d\n", natPortBlock.BlockEnd) +
fmt.Sprintf(" NAT pstep : %d\n", natPortBlock.BlockStep) +
fmt.Sprintf(" NAT psize : %d\n", natPortBlock.BlockSize)
return s
}
func (flowRecord *FlowRecordV3) dumpEXipReceived() string {
var ipReceived *EXipReceived
if ipReceived = flowRecord.IpReceived(); ipReceived == nil {
return ""
}
return fmt.Sprintf(" IP received : %v\n", ipReceived.IP)
}
func (flowRecord *FlowRecordV3) dumpEXflowId() string {
var flowId *EXflowId
if flowId = flowRecord.FlowId(); flowId == nil {
return ""
}
return fmt.Sprintf(" Flow ID : 0x%x\n", flowId.FlowId)
}
func (flowRecord *FlowRecordV3) dumpEXnokiaNAT() string {
var nokiaNat *EXnokiaNat
if nokiaNat = flowRecord.NokiaNat(); nokiaNat == nil {
return ""
}
var s string = "" +
fmt.Sprintf(" In Srv ID : %d\n", nokiaNat.InServiceID) +
fmt.Sprintf(" Out Srv ID : %d\n", nokiaNat.OutServiceID)
return s
}
func (flowRecord *FlowRecordV3) dumpEXnokiaNatString() string {
var natString EXnokiaNatString
if natString = flowRecord.NokiaNatString(); natString == "" {
return ""
}
return fmt.Sprintf(" Flow ID : %v\n", natString)
}
func (flowRecord *FlowRecordV3) dumpEXipInfoString() string {
var ipInfo *EXipInfo
if ipInfo = flowRecord.IpInfo(); ipInfo == nil {
return ""
}
var DF string = "--"
var MF string = "--"
if ipInfo.FragmentFlags&FlagMF != 0 {
MF = "MF"
}
if ipInfo.FragmentFlags&FlagDF != 0 {
DF = "DF"
}
var s string = "" +
fmt.Sprintf(" IP min ttl : %d\n", ipInfo.MinTTL) +
fmt.Sprintf(" IP max ttl : %d\n", ipInfo.MaxTTL) +
fmt.Sprintf(" IP fragment : %s%s\n", DF, MF)
return s
}