test(ci): adding an entrypoint to ext-dn to programmatically do configuration

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

ci-scripts/Dockerfile.traffic.generator.ubuntu

@@ -52,4 +52,8 @@ RUN apt-get update && \
 
 WORKDIR /tmp
 
+COPY trfgen_entrypoint.sh .
+
+ENTRYPOINT ["/bin/bash","/tmp/trfgen_entrypoint.sh"]
+
 CMD ["sleep", "infinity"]

ci-scripts/trfgen_entrypoint.sh

+#!/usr/bin/env bash
+
+EBPF_GW_SETUP=${EBPF_GW_SETUP:-no}
+EBPF_GW_MTU=${EBPF_GW_MTU:-1460}
+
+if [[ ${EBPF_GW_SETUP} == "yes" ]];then
+  echo -e "Trying to disable TCP checksum and to setup MTU on N6 interface"
+  N6_IF_NAME=(`ifconfig | grep -B1 "inet $EBPF_GW_N6_IP_ADDR" | awk '$1!="inet" && $1!="--" {print $1}' | sed -e "s@:@@"`)
+  echo -e "N6 interface is $N6_IF_NAME"
+  ethtool -K $N6_IF_NAME tx off
+  ifconfig $N6_IF_NAME mtu $EBPF_GW_MTU
+  ifconfig $N6_IF_NAME
+  echo -e "Adding UE IP routing to the N6 interface of UPF"
+  ip route add $UE_IP_ADDRESS_POOL via $N6_UPF_IP_ADDR dev $N6_IF_NAME
+  ip route
+fi
+
+echo "Done setting the configuration"
+exec "$@"

docker-compose/docker-compose-basic-nrf-ebpf.yaml

@@ -145,10 +145,11 @@ services:
         init: true
         container_name: oai-ext-dn
         image: oaisoftwarealliance/trf-gen-cn5g:latest
-        entrypoint: /bin/bash -c \
-              "ethtool -K eth0 tx off;"\
-              "ip route add 12.1.1.0/24 via 192.168.72.129 dev eth1; ip route; sleep infinity"
-        command: ["/bin/bash", "-c", "trap : SIGTERM SIGINT; sleep infinity & wait"]
+        environment:
+            - EBPF_GW_SETUP=yes
+            - EBPF_GW_N6_IP_ADDR=192.168.72.135
+            - UE_IP_ADDRESS_POOL=12.1.1.0/24
+            - N6_UPF_IP_ADDR=192.168.72.129
         healthcheck:
             test: /bin/bash -c "ip r | grep 12.1.1"
             interval: 10s