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Restyled by shfmt
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restyled-commits committed Jun 2, 2021
1 parent 942edfe commit 1ba3585
Showing 1 changed file with 115 additions and 115 deletions.
230 changes: 115 additions & 115 deletions scripts/tools/linux_ip_namespace_setup.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -42,95 +42,95 @@ BRIDGE_IPV6_ADDR=fc00::b
NAMESPACE_IPV6_ADDR=fc00::a

function run_setup() {
# Create namespace.
ip netns add "$NAMESPACE"
# Create namespace.
ip netns add "$NAMESPACE"

# Create two virtual interfaces and link them - one on host side, one on namespace side.
ip link add "$HOST_SIDE_IF_NAME" type veth peer name "$NAMESPACE_SIDE_IF_NAME"
# Create two virtual interfaces and link them - one on host side, one on namespace side.
ip link add "$HOST_SIDE_IF_NAME" type veth peer name "$NAMESPACE_SIDE_IF_NAME"

# Give the host a known IPv6 addr and set the host side up
ip -6 addr add "$HOST_IPV6_ADDR"/64 dev "$HOST_SIDE_IF_NAME"
ip link set "$HOST_SIDE_IF_NAME" up
# Give the host a known IPv6 addr and set the host side up
ip -6 addr add "$HOST_IPV6_ADDR"/64 dev "$HOST_SIDE_IF_NAME"
ip link set "$HOST_SIDE_IF_NAME" up

# Associate namespace IF with the namespace
ip link set "$NAMESPACE_SIDE_IF_NAME" netns "$NAMESPACE"
# Associate namespace IF with the namespace
ip link set "$NAMESPACE_SIDE_IF_NAME" netns "$NAMESPACE"

# Give the namespace IF an address (something nothing else is using) and set it up
echo "Adding address for namespace IF"
ip netns exec "$NAMESPACE" ip -6 addr add "$NAMESPACE_IPV6_ADDR"/64 dev "$NAMESPACE_SIDE_IF_NAME"
ip netns exec "$NAMESPACE" ip link set dev "$NAMESPACE_SIDE_IF_NAME" up
# Give the namespace IF an address (something nothing else is using) and set it up
echo "Adding address for namespace IF"
ip netns exec "$NAMESPACE" ip -6 addr add "$NAMESPACE_IPV6_ADDR"/64 dev "$NAMESPACE_SIDE_IF_NAME"
ip netns exec "$NAMESPACE" ip link set dev "$NAMESPACE_SIDE_IF_NAME" up

# Add a route to the namespace to go through the bridge
echo "Setting routes for namespace"
ip netns exec "$NAMESPACE" ip -6 route add default dev "$NAMESPACE_SIDE_IF_NAME"
# Add a route to the namespace to go through the bridge
echo "Setting routes for namespace"
ip netns exec "$NAMESPACE" ip -6 route add default dev "$NAMESPACE_SIDE_IF_NAME"

echo "Setup complete."
echo "Setup complete."
}

function run_add_ipv4() {
# Give the namespace an IPv4 address
ip netns exec "$NAMESPACE" ip addr add "$NAMESPACE_ADDR"/24 dev "$NAMESPACE_SIDE_IF_NAME"
# Give the namespace an IPv4 address
ip netns exec "$NAMESPACE" ip addr add "$NAMESPACE_ADDR"/24 dev "$NAMESPACE_SIDE_IF_NAME"

# Add a bridge, give it an address (something nothing else is using)
echo "Setting up bridge"
ip link add name "$BRIDGE_NAME" type bridge
ip -6 addr add "$BRIDGE_IPV6_ADDR"/64 dev "$BRIDGE_NAME"
ip addr add "$BRIDGE_ADDR"/24 brd + dev "$BRIDGE_NAME"
# Add a bridge, give it an address (something nothing else is using)
echo "Setting up bridge"
ip link add name "$BRIDGE_NAME" type bridge
ip -6 addr add "$BRIDGE_IPV6_ADDR"/64 dev "$BRIDGE_NAME"
ip addr add "$BRIDGE_ADDR"/24 brd + dev "$BRIDGE_NAME"

# For ipv6 and ipv4 to work together, need the bridge to ignore the ipv6 packets (DROP here means don't bridge)
ebtables-legacy -t broute -A BROUTING -p ipv6 -j DROP -i "$HOST_SIDE_IF_NAME"
ip link set "$BRIDGE_NAME" up
# For ipv6 and ipv4 to work together, need the bridge to ignore the ipv6 packets (DROP here means don't bridge)
ebtables-legacy -t broute -A BROUTING -p ipv6 -j DROP -i "$HOST_SIDE_IF_NAME"
ip link set "$BRIDGE_NAME" up

# Connect the host side to the bridge, so now we have bridge <-> host_side_if <-> namespace_if
echo "Connecting host virtual IF to bridge"
ip link set "$HOST_SIDE_IF_NAME" master "$BRIDGE_NAME"
# Connect the host side to the bridge, so now we have bridge <-> host_side_if <-> namespace_if
echo "Connecting host virtual IF to bridge"
ip link set "$HOST_SIDE_IF_NAME" master "$BRIDGE_NAME"

#ip netns exec ${NAMESPACE} ip route add default via ${BRIDGE_ADDR} dev ${NAMESPACE_SIDE_IF_NAME}
#ip netns exec ${NAMESPACE} ip route add default via ${BRIDGE_ADDR} dev ${NAMESPACE_SIDE_IF_NAME}
}

function run_cmd() {
# Start the app in the namespace
echo "Running $1 in namespace."
ip netns exec "$NAMESPACE" "$1"
# Start the app in the namespace
echo "Running $1 in namespace."
ip netns exec "$NAMESPACE" "$1"
}

function run_cleanup() {
# Deleting the namespace will remove the namespace and peer'd interfaces to
have_ebtables_legacy=$1
ip netns delete "$NAMESPACE"
if ifconfig | grep "$BRIDGE_NAME"; then
if [ "$have_ebtables_legacy" = true ]; then
# Just try to drop the additional rule - it references our interface
# so if it's there, we added it.
ebtables-legacy -t broute -D BROUTING -p ipv6 -j DROP -i "$HOST_SIDE_IF_NAME" >/dev/null
# Deleting the namespace will remove the namespace and peer'd interfaces to
have_ebtables_legacy=$1
ip netns delete "$NAMESPACE"
if ifconfig | grep "$BRIDGE_NAME"; then
if [ "$have_ebtables_legacy" = true ]; then
# Just try to drop the additional rule - it references our interface
# so if it's there, we added it.
ebtables-legacy -t broute -D BROUTING -p ipv6 -j DROP -i "$HOST_SIDE_IF_NAME" >/dev/null
fi
ip link delete dev "$BRIDGE_NAME" type bridge
fi
ip link delete dev "$BRIDGE_NAME" type bridge
fi
}

function help() {
echo "Usage: $file_name [ options ... ]"
echo ""

echo "This script is used to set up linux namespaces for Matter device testing"
echo "between a controller and device on the same linux machine."
echo ""
echo "To use this script, run the device code in a namespace using the -r command"
echo "and a controller in a seperate terminal to simulate two devices communicating"
echo "across a network."
echo "Example:"
echo "--------"
echo "Terminal 1:"
echo "sudo <path>/$file_name -r <path>/<application_name>"
echo ""
echo "Terminal 2:"
echo "<path>/chip-device-ctrl"
echo ""
echo "This script requires sudo for setup and requires access to ebtables-legacy"
echo "to set up dual ipv4/ipv6 namespaces. Defaults to ipv6 only."
echo ""

echo "Options:
echo "Usage: $file_name [ options ... ]"
echo ""

echo "This script is used to set up linux namespaces for Matter device testing"
echo "between a controller and device on the same linux machine."
echo ""
echo "To use this script, run the device code in a namespace using the -r command"
echo "and a controller in a seperate terminal to simulate two devices communicating"
echo "across a network."
echo "Example:"
echo "--------"
echo "Terminal 1:"
echo "sudo <path>/$file_name -r <path>/<application_name>"
echo ""
echo "Terminal 2:"
echo "<path>/chip-device-ctrl"
echo ""
echo "This script requires sudo for setup and requires access to ebtables-legacy"
echo "to set up dual ipv4/ipv6 namespaces. Defaults to ipv6 only."
echo ""

echo "Options:
-h, --help Display this information.
-s, --setup Setup an IP namespace. Will run cleanup if namespace exists.
-4, --ipv4 Add ipv4 support.
Expand All @@ -148,86 +148,86 @@ declare ipv4=false
file_name=${0##*/}

while (($#)); do
case $1 in
--help | -h)
help
exit 1
;;
--setup | -s)
setup=true
;;
--run | -r)
run=true
filename=$2
case $1 in
--help | -h)
help
exit 1
;;
--setup | -s)
setup=true
;;
--run | -r)
run=true
filename=$2
shift
;;
--cleanup | -c)
cleanup=true
;;
--ipv4 | -4)
ipv4=true
;;
-*)
help
echo "Unknown Option \"$1\""
exit 1
;;
esac
shift
;;
--cleanup | -c)
cleanup=true
;;
--ipv4 | -4)
ipv4=true
;;
-*)
help
echo "Unknown Option \"$1\""
exit 1
;;
esac
shift
done

if [[ $EUID -ne 0 ]]; then
echo "You must run this script with superuser privileges."
exit 1
echo "You must run this script with superuser privileges."
exit 1
fi

if ifconfig | grep "$HOST_SIDE_IF_NAME"; then
issetup=true
issetup=true
else
issetup=false
issetup=false
fi

if [ "$setup" = false ] && [ "$run" = false ] && [ "$cleanup" = false ]; then
echo "Must specify one or more of -s, -r, -c."
exit 1
echo "Must specify one or more of -s, -r, -c."
exit 1
fi

if command -v ebtables-legacy >/dev/null; then
have_ebtables_legacy=true
have_ebtables_legacy=true
else
have_ebtables_legacy=false
have_ebtables_legacy=false
fi

if [ "$ipv4" = true ] && [ "$have_ebtables_legacy" = false ]; then
echo "To set up namespaces with ipv4/ipv6 connectivity, ebtables-legacy"
echo "is required. For example, to install on machines using APT:"
echo "sudo apt-get install ebtables"
exit 1
echo "To set up namespaces with ipv4/ipv6 connectivity, ebtables-legacy"
echo "is required. For example, to install on machines using APT:"
echo "sudo apt-get install ebtables"
exit 1
fi

if [ "$run" = true ]; then
if [ "$issetup" = false ]; then
setup=true
fi
if [ "$issetup" = false ]; then
setup=true
fi
fi

if [ "$setup" = true ]; then
if [ "$issetup" = true ]; then
cleanup=true
fi
if [ "$issetup" = true ]; then
cleanup=true
fi
fi

if [ "$cleanup" = true ]; then
run_cleanup "$have_ebtables_legacy"
run_cleanup "$have_ebtables_legacy"
fi

if [ "$setup" = true ]; then
run_setup
if [ "$ipv4" = true ]; then
run_add_ipv4
fi
run_setup
if [ "$ipv4" = true ]; then
run_add_ipv4
fi
fi

if [ "$run" = true ]; then
run_cmd "$filename"
run_cmd "$filename"
fi

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