Merge pull request #24 from KASHZKX/fix/upf-22-wrapper-sh-fails-on-debian-13

fix: wrapper.sh fails on Debian 13

Author: ianchen0119

charts/free5gc/charts/free5gc-upf/templates/psaupf1/psaupf1-configmap.yaml

@@ -48,6 +48,12 @@ data:
     ### Implement networking rules
     iptables -A FORWARD -j ACCEPT
     iptables -t nat -A POSTROUTING -s {{ $.Values.global.uesubnet }} -o n6 -j MASQUERADE  # route traffic comming from the UE SUBNET to the interface N6
+
+    mkdir -p /etc/iproute2 # Debian 13 (trixie) ships the default table mappings at /usr/share/iproute2/rt_tables, but the UPF needs it at /etc/iproute2/rt_tables, so we need to copy it if it doesn't exist
+    if [ ! -f /etc/iproute2/rt_tables ]; then
+        cp /usr/share/iproute2/rt_tables /etc/iproute2/rt_tables
+    fi
+
     echo "1200 n6if" >> /etc/iproute2/rt_tables # create a routing table for the interface N6
     ip rule add from {{ $.Values.global.uesubnet }} table n6if   # use the created ip table to route the traffic comming from the UE SUBNET
     ip route add default via {{ $.Values.global.n6network.gatewayIP }} dev n6 table n6if  # add a default route in the created table so that all UEs will use this gateway for external communications (target IP not in the Data Network attached to the interface N6) and then the Data Network will manage to route the traffic

charts/free5gc/charts/free5gc-upf/templates/psaupf2/psaupf2-configmap.yaml

@@ -48,6 +48,12 @@ data:
     ### Implement networking rules
     iptables -A FORWARD -j ACCEPT
     iptables -t nat -A POSTROUTING -s {{ $.Values.global.uesubnet }} -o n6 -j MASQUERADE  # route traffic comming from the UE SUBNET to the interface N6
+
+    mkdir -p /etc/iproute2 # Debian 13 (trixie) ships the default table mappings at /usr/share/iproute2/rt_tables, but the UPF needs it at /etc/iproute2/rt_tables, so we need to copy it if it doesn't exist
+    if [ ! -f /etc/iproute2/rt_tables ]; then
+        cp /usr/share/iproute2/rt_tables /etc/iproute2/rt_tables
+    fi
+
     echo "1200 n6if" >> /etc/iproute2/rt_tables # create a routing table for the interface N6
     ip rule add from {{ $.Values.global.uesubnet }} table n6if   # use the created ip table to route the traffic comming from the UE SUBNET
     ip route add default via {{ $.Values.global.n6network.gatewayIP }} dev n6 table n6if  # add a default route in the created table so that all UEs will use this gateway for external communications (target IP not in the Data Network attached to the interface N6) and then the Data Network will manage to route the traffic