Napatech

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Revision as of 14:27, 2 January 2026 by Admin (talk | contribs) (Add explicit git checkout develop instructions and AI Summary for RAG)

Configuration & building

First Installation

Steps

  • download latest Napatech drivers and untar it into e.g. /opt/napatech3
  • build the driver
  • download the the sniffer's source
cd /usr/src
git clone -b master https://github.com/voipmonitor/sniffer.git
   OR
git clone -b develop https://github.com/voipmonitor/sniffer.git
cd sniffer
./configure --with-dpdk-include=/opt/napatech3/include --with-dpdk-lib=/opt/napatech3/lib

Note: The development branch is named develop (NOT "development"). Use git checkout develop to switch to it.

If you already have the repository cloned and want to switch to the develop branch: 

cd /usr/src/sniffer
git fetch origin
git checkout develop
git pull

Install all libraries that the configure needs.

  • run make
  • check it's built properly
root@server:/usr/src/sniffer# ldd ./voipmonitor | grep pcap
	libpcap.so.1 => /opt/napatech3/lib/libpcap.so.1 (0x00007fc0b69b0000)
  • replace original binary in the /usr/local/sbin
  • run it

Upgrade

The GUI way (from the sensor's version 24.23)

Until sensor's version 24.23 was not possible to do the sensor's upgrade via 'upgrade_by_git' option because the configure script overwritten the adjusted Makefile and you built a binary with standard pcap libs (until you overwritten the orig libs). With 'configure_param' option you can adjust the Makefile creation for appropriate includes/libs


  • set these options into voipmonitor.conf
upgrade_by_git = yes
git_folder = /usr/src/sniffer
configure_param = --with-dpdk-include=/opt/napatech3/include --with-dpdk-lib=/opt/napatech3/lib
  • restart sniffer
  • do the upgrade via clicking in the GUI

The sniffer will perform (after click on UPGRADE in GUI) git pull,configure,make_clean,make, service voipmonitor stop, make install, service voipmonitor start.


The manual way

cd /usr/src/sniffer
git checkout develop
git pull
./configure --with-dpdk-include=/opt/napatech3/include --with-dpdk-lib=/opt/napatech3/lib
make
  • copy to the original directory and restart sensor


napatech drivers

Settings sample

  • in voipmonitor.conf
interface = napa0

# filter option must be commented out !!! E.g.
#filter = udp or (vlan and udp)
  • /opt/napatech3/config/ntpcap.ini
# Napatech default ntpcap.ini file
[Common]
Ntpl1 = "Assign[streamid=0;txport=0;txignore=true]=all"

[napa0 ]
StreamId = 0
Tx = 0
  • old version
[napa0]
Rx1="Assign[streamid=252;txport=0;txignore=true]=all"
Tx=0
  • /opt/napatech3/config/ntservice.ini
[System]
TimestampFormat = NATIVE_UNIX
TimestampMethod = EOF
HostBufferWaitMethod = 0
SDRAMFillLevelWarning = 0



[logging]
LogMask = 0x07
LogToFile = 0
LogFileName = /tmp/Log3G_%s.log
LogBufferWrap = wrap

[Adapter0]
AdapterType = NT4E
BusId = 00:07:00:00
PacketDescriptor = NT
HostBuffersRx = [8,16,0]
HostBuffersTx = [8,16,0]
TimeSyncProtocol = NT
TimeSyncConnectorIn = Ext
TimeSyncConnectorOut = None
TimeSyncConnectorRepeat = None
TimeSyncTimeJumpThreshold = 1
TimeSyncTimeOffset = 0
MaxFrameSize = 9018
AltTPID = 0x8100
Profile = Capture
DiscardSize = 16
OsTimeSyncFailover = DISABLE

Timing source In napatech where timestamp of packets is shifted to GMT and you want use system time instead: GMT: 

TimeSyncConnectorExt1 = PpsIn

System dependent: 

TimeSyncConnectorExt1 = NttsIn

For new napatech drivers use following to set OS time for packets from napatech 

TimesynConnectorExt1  = None
TimeSyncReferencePrioroity =OSTime

Hints

service file for voipmonitor

You need to add to voipmonitor's service file that napatech drivers (ntservice) needs to be started before the voipmonitor by modifiyng the service file

Filter traffic on Napatech card

If you want to filter a data directly in the Napatech card you can use this example as a starting point. (many thanks to Distributel for the example)

Create a file e.g /opt/napatech3/myfilter.ntpl 

# Start NTPL
# Delete all existing filter
delete = all

# Setup UDP macros

DefineMacro("mUdpSrcPort", "Data[DynOffset=DynOffUDPFrame;Offset=0;DataType=ByteStr2]")
DefineMacro("mUdpDestPort", "Data[DynOffset=DynOffUDPFrame;Offset=2;DataType=ByteStr2]")

# Setup filters
# The first line is the SIP filter. The second line is the RTP filter for our specific ports in HEX (10000-61743)

Assign[StreamId = 0] = (mUdpSrcPort == 5060, 5061) AND (mUdpDestPort == 5060, 5061)
Assign[StreamId = 0] = (mUdpSrcPort == (0x2710..0xF12F))
Assign[StreamId = 1] = (mUdpSrcPort == 5060, 5061) AND (mUdpDestPort == 5060, 5061)
Assign[StreamId = 1] = (mUdpSrcPort == (0x2710..0xF12F))
Assign[StreamId = 2] = (mUdpSrcPort == 5060, 5061) AND (mUdpDestPort == 5060, 5061)
Assign[StreamId = 2] = (mUdpSrcPort == (0x2710..0xF12F))
Assign[StreamId = 3] = (mUdpSrcPort == 5060, 5061) AND (mUdpDestPort == 5060, 5061)
Assign[StreamId = 3] = (mUdpSrcPort == (0x2710..0xF12F))
# End NTPL

# Enable Deduplication
DeduplicationConfig[drop=duplicate] = GroupID == 0
Define ckRecipe = CorrelationKey(Begin=StartOfFrame[0], End=EndOfFrame[0], DeduplicationGroupID=0)
Assign[StreamID=0,1,2,3; CorrelationKey=ckRecipe] = Port == 0,1,2,3


Start it with the command 

/opt/napatech3/bin/ntstart.sh -n myfilters.ntpl

AI Summary for RAG

Summary: This document provides instructions for building VoIPmonitor sniffer with Napatech network adapter support. For first installation: download Napatech drivers to /opt/napatech3, clone the sniffer repository using either git clone -b develop for the development branch or git clone -b master for stable, run configure with Napatech include/lib paths, and run make. The development branch is named "develop" (NOT "development") - use git checkout develop to switch branches. For upgrades via GUI (sensor v24.23+), configure upgrade_by_git=yes, git_folder, and configure_param options. For manual upgrades: git checkout develop, git pull, ./configure with Napatech paths, make. The document also includes Napatech driver configuration samples for ntpcap.ini and ntservice.ini, plus NTPL filtering examples. Keywords: Napatech, compilation, build, git clone, git checkout, develop branch, configure, make, upgrade_by_git, configure_param, ntpcap.ini, ntservice.ini, NTPL filter, dpdk Key Questions:

  • How do I compile VoIPmonitor with Napatech support?
  • What is the correct git branch name for VoIPmonitor development?
  • How do I switch to the develop branch in VoIPmonitor git repository?
  • What configure options are needed for Napatech cards?
  • How do I upgrade VoIPmonitor sniffer with Napatech manually?
  • What is the difference between git checkout develop and git checkout development?
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