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IP routing

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Kroese 2023-05-10 05:48:46 +02:00 committed by GitHub
parent fa69ff9166
commit 3a41f2dda0
1 changed files with 7 additions and 8 deletions
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15
run/network.sh
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@ -27,6 +27,8 @@ configureDHCP() {
IP=$(ip address show dev "${VM_NET_DEV}" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/)
[[ "${DEBUG}" == [Yy1]* ]] && set -x
# Create a macvlan network to allow for communication between the host and the VM guest
{ ip link add link "${VM_NET_DEV}" "${VM_NET_VLAN}" type macvlan mode bridge ; rc=$?; } || :
if (( rc != 0 )); then
@ -41,6 +43,7 @@ configureDHCP() {
ip route del "${NETWORK}" dev "${VM_NET_DEV}"
ip route add "${NETWORK}" dev "${VM_NET_VLAN}" metric 0
# Create a macvtap network for the VM guest
{ ip link add link "${VM_NET_DEV}" name "${VM_NET_TAP}" address "${VM_NET_MAC}" type macvtap mode bridge ; rc=$?; } || :
if (( rc != 0 )); then
@ -50,9 +53,6 @@ configureDHCP() {
ip link set "${VM_NET_TAP}" up
ip address flush "${VM_NET_DEV}"
ip address flush "${VM_NET_TAP}"
{ set +x; } 2>/dev/null
TAP_NR=$(</sys/class/net/"${VM_NET_TAP}"/ifindex)
@ -94,8 +94,7 @@ configureNAT () {
VM_NET_IP='20.20.20.21'
[[ "${DEBUG}" == [Yy1]* ]] && set -x
#Create bridge with static IP for the VM guest
# Create bridge with static IP for the VM guest
{ ip link add dev dockerbridge type bridge ; rc=$?; } || :
if (( rc != 0 )); then
@ -106,12 +105,12 @@ configureNAT () {
ip address add ${VM_NET_IP%.*}.1/24 broadcast ${VM_NET_IP%.*}.255 dev dockerbridge
ip link set dockerbridge up
#QEMU Works with taps, set tap to the bridge created
# QEMU Works with taps, set tap to the bridge created
ip tuntap add dev "${VM_NET_TAP}" mode tap
ip link set "${VM_NET_TAP}" up promisc on
ip link set dev "${VM_NET_TAP}" master dockerbridge
#Add internet connection to the VM
# Add internet connection to the VM
iptables -t nat -A POSTROUTING -o "${VM_NET_DEV}" -j MASQUERADE
iptables -t nat -A PREROUTING -i "${VM_NET_DEV}" -p tcp -j DNAT --to $VM_NET_IP
iptables -t nat -A PREROUTING -i "${VM_NET_DEV}" -p udp -j DNAT --to $VM_NET_IP
@ -124,7 +123,7 @@ configureNAT () {
{ set +x; } 2>/dev/null
[[ "${DEBUG}" == [Yy1]* ]] && echo
#Check port forwarding flag
# Check port forwarding flag
if [[ $(< /proc/sys/net/ipv4/ip_forward) -eq 0 ]]; then
{ sysctl -w net.ipv4.ip_forward=1 ; rc=$?; } || :
if (( rc != 0 )); then