Napatech

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

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 pull
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