Fix #134 - PacketRusher is not setting QFI field

[linouxis9]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Fix [BUG] QFI header not added to gtp packet #134
• Depends on Add support for setting PDU Session Container Type to UL free5gc/gtp5g#108
• This PR also imports Add support for new attr FAR_UL_OR_DL from free5gc/gtp5g#108 free5gc/go-gtp5gnl#23 inside PacketRusher's own go-gtp5gnl fork

To test this bugfix:

git clone https://github.com/HewlettPackard/PacketRusher.git
cd PacketRusher
export PACKETRUSHER=$PWD
git checkout fix/134

cd $PACKETRUSHER/lib/gtp5g
# If you already had PacketRusher or gtp5g (via free5gc's UPF installed): sudo make uninstall
make clean && make -j && sudo make install

cd $PACKETRUSHER
go mod download
go build cmd/packetrusher.go
sudo ./packetrusher ue # QFI is now supported

• I have read the CONTRIBUTING document.
• Each of my commits messages include Signed-off-by: Author Name <[email protected]> to accept the DCO.

Notable mention to @checkmypi for his implementation of that feature in his fork :-)