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Merge pull request #14928 from miri64/tools/enh/tapsetup-more
tapsetup: add more features
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Martine Lenders
GitHub
commit
918433995d
238
dist/tools/tapsetup/tapsetup
vendored
238
dist/tools/tapsetup/tapsetup
vendored
@ -6,6 +6,10 @@ COMMAND=""
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BRNAME="tapbr0"
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TAPNAME="tap"
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DEACTIVATE_IPV6=""
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ENABLE_FORWARDING=0
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BRIDGE_ADDRS=""
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BRIDGE_ROUTES=""
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DEFAULT_PREFIX_LEN=128
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UPLINK=""
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usage() {
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@ -17,6 +21,17 @@ usage() {
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echo "Options:" >&2
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echo " -c [<num>], --create [<num>]: Create <num> tap interfaces (default: 2)" >&2
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echo " -d, --delete: Delete all interface" >&2
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echo " -l <iface>, --list <iface>: If <iface> belongs to a bridge, list the bridge and" >&2
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echo " all interfaces that belong to it. If <iface> does " >&2
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echo" not belong to a bridge, just print <iface>." >&2
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echo " -a <address>[/<prefix_len>], --address <address>[/<prefix_len>]:" >&2
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echo " Address to add to the created bridge. Can be used" >&2
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echo " multiple times." >&2
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echo " -r <route>[/<prefix_len>] <next_hop>, --route <route>[/<prefix_len>] <next_hop>:" >&2
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echo " Route to add to via the created bridge. Can be used" >&2
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echo " multiple times." >&2
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echo " -f, --forwarding Enable forwarding system-wide on creation and " >&2
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echo " disable on deletion." >&2
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echo " -b <name>, --bridge <name>: Give name for the bridge (default: tapbr)" >&2
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echo " -t <name>, --tap <name>: Name base for the tap interfaces; the" >&2
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echo " generated names will be <name>x" >&2
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@ -43,8 +58,66 @@ update_uplink() {
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fi
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}
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activate_forwarding() {
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if [ ${ENABLE_FORWARDING} -eq 1 ]; then
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case "${PLATFORM}" in
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FreeBSD|OSX)
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sysctl -w net.inet.ip.forwarding=1 || exit 1 ;;
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Linux)
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sysctl -w net.ipv6.conf.${BRNAME}.forwarding=1 || exit 1
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sysctl -w net.ipv6.conf.${BRNAME}.accept_ra=0 || exit 1
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sysctl -w net.ipv6.conf.all.forwarding=1 || exit 1 ;;
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*) ;;
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esac
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fi
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}
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add_ipv6_addrs() {
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for a in ${BRIDGE_ADDRS}; do
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address_addr=$(echo "${a}" | cut -d/ -f1)
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prefix_len=$(echo "${a}" | cut -d/ -f2)
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if [ "${a}" = "${prefix_len}" ]; then
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# prefix length is not defined
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prefix_len=${DEFAULT_PREFIX_LEN}
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fi
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case "${PLATFORM}" in
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FreeBSD|OSX)
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ifconfig ${BRNAME} inet6 ${address_addr} prefixlen ${prefix_len} || exit 1
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;;
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Linux)
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ip address add ${address_addr}/${prefix_len} dev ${BRNAME} || exit 1
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;;
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*) ;;
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esac
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done
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}
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add_ipv6_routes() {
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for r in ${BRIDGE_ROUTES}; do
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route=$(echo "${r}" | cut -d- -f1)
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next_hop=$(echo "${r}" | cut -d- -f2)
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route_prefix=$(echo "${route}" | cut -d/ -f1)
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route_prefix_len=$(echo "${route}" | cut -d/ -f2)
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if [ "${route}" = "${route_prefix_len}" ]; then
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# prefix length is not defined
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route_prefix_len=${DEFAULT_PREFIX_LEN}
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fi
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case "${PLATFORM}" in
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FreeBSD|OSX)
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route -6n add ${route_prefix} -interface ${BRNAME} \
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${next_hop} || exit 1
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;;
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Linux)
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ip route add ${route_prefix}/${route_prefix_len} \
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via ${next_hop} dev ${BRNAME} || exit 1
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;;
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*) ;;
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esac
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done
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}
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create_bridge() {
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echo "creating ${BRNAME}"
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echo "creating bridge ${BRNAME}"
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case "${PLATFORM}" in
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FreeBSD)
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@ -82,12 +155,73 @@ up_bridge() {
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esac
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}
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deactivate_forwarding() {
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if [ ${ENABLE_FORWARDING} -eq 1 ]; then
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case "${PLATFORM}" in
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FreeBSD|OSX)
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sysctl -w net.inet.ip.forwarding=0 || exit 1 ;;
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Linux)
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sysctl -w net.ipv6.conf.${BRNAME}.forwarding=0 || exit 1
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sysctl -w net.ipv6.conf.${BRNAME}.accept_ra=1 || exit 1
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sysctl -w net.ipv6.conf.all.forwarding=0 || exit 1 ;;
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*) ;;
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esac
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fi
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}
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del_ipv6_addrs() {
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for a in ${BRIDGE_ADDRS}; do
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address_addr=$(echo "${a}" | cut -d/ -f1)
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prefix_len=$(echo "${a}" | cut -d/ -f2)
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if [ "${a}" = "${prefix_len}" ]; then
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# prefix length is not defined
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prefix_len=${DEFAULT_PREFIX_LEN}
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fi
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case "${PLATFORM}" in
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FreeBSD|OSX)
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ifconfig ${BRNAME} inet6 ${address_addr} prefixlen ${prefix_len} delete || exit 1
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;;
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Linux)
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ip address delete ${address_addr}/${prefix_len} dev ${BRNAME} || exit 1
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;;
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*) ;;
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esac
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done
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}
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del_ipv6_routes() {
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for r in ${BRIDGE_ROUTES}; do
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route=$(echo "${r}" | cut -d- -f1)
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next_hop=$(echo "${r}" | cut -d- -f2)
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route_prefix=$(echo "${route}" | cut -d/ -f1)
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route_prefix_len=$(echo "${route}" | cut -d/ -f2)
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if [ "${route}" = "${route_prefix_len}" ]; then
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# prefix length is not defined
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route_prefix_len=${DEFAULT_PREFIX_LEN}
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fi
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case "${PLATFORM}" in
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FreeBSD|OSX)
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route -6 delete ${route_prefix}/${route_prefix_len} \
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-interface ${BRNAME} ${next_hop} || exit 1
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;;
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Linux)
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ip route delete ${route_prefix}/${route_prefix_len} \
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via ${next_hop} dev ${BRNAME} || exit 1
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;;
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*) ;;
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esac
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done
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}
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delete_bridge() {
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echo "deleting ${BRNAME}"
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case "${PLATFORM}" in
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FreeBSD)
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sysctl net.link.tap.user_open=0
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for IF in $(ifconfig ${BRIDGE} | grep -oiE "member: .+ " | cut -d' ' -f2); do
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ifconfig $IF destroy || exit 1
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done
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ifconfig ${BRNAME} destroy || exit 1
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kldunload if_tap # unloading might fail due to dependencies
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kldunload if_bridge ;;
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@ -105,6 +239,9 @@ delete_bridge() {
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update_uplink ${UPLINK}
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fi ;;
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OSX)
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for IF in $(ifconfig ${BRIDGE} | grep -oiE "member: .+ " | cut -d' ' -f2); do
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ifconfig $IF destroy || exit 1
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done
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ifconfig ${BRNAME} destroy || exit 1 ;;
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*)
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;;
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@ -148,11 +285,64 @@ create_tap() {
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esac
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}
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get_master() {
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IFACE=$1
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case "${PLATFORM}" in
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Linux)
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MASTER=$(ip link show ${IFACE} | grep -o "master \S\+" | cut -d' ' -f2)
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;;
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FreeBSD|OSX)
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for IF in $(ifconfig | grep -oiE "^[a-z0-9_-]+"); do
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if ifconfig $IF | grep -q "member: $IFACE"; then
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MASTER=${IF}
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break
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fi
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done
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;;
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*)
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;;
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esac
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if [ -z "$MASTER" ]; then
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# IFACE is its own master
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echo "$IFACE"
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else
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echo "$MASTER"
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fi
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}
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list_bridge() {
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BRIDGE=$1
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echo "$BRIDGE:"
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case "${PLATFORM}" in
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Linux)
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for IF in $(ls /sys/class/net/${BRIDGE}/brif); do
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echo "- $IF"
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done
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;;
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FreeBSD|OSX)
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for IF in $(ifconfig ${BRIDGE} | grep -oiE "member: .+ " | cut -d' ' -f2); do
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echo "- $IF"
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done
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;;
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*)
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;;
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esac
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}
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while true ; do
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case "$1" in
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-6)
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DEACTIVATE_IPV6=1
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shift ;;
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-a|--address)
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# check if valid address + optional prefix length
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if echo "$2" | grep -q "^[a-f0-9:]\+\(/[0-9]\+\)\?$"; then
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BRIDGE_ADDRS="${BRIDGE_ADDRS} $2"
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shift 2
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else
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usage
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exit 2
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fi ;;
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-b|--bridge)
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case "$2" in
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"")
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@ -185,9 +375,39 @@ while true ; do
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fi
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COMMAND="delete"
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shift ;;
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-f|--forwarding)
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ENABLE_FORWARDING=1
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shift ;;
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-l|--list)
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if [ -n "${COMMAND}" ]; then
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usage
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exit 2
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fi
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COMMAND="list"
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case "$2" in
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"")
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usage
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exit 2 ;;
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*)
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BRNAME="$2"
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shift 2 ;;
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esac ;;
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-h|--help)
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usage
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exit ;;
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-r|--route)
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# check if valid address + optional prefix length
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if ! echo "$2" | grep -q "^[a-f0-9:]\+\(/[0-9]\+\)\?$"; then
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usage
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exit 2
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fi
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# check if valid next hop
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if ! echo "$3" | grep -q "^[a-f0-9:]\+$"; then
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usage
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exit 2
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fi
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BRIDGE_ROUTES="${BRIDGE_ROUTES} $2-$3"
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shift 3 ;;
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-u|--uplink)
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case "$2" in
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"")
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@ -213,13 +433,13 @@ while true ; do
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esac
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done
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if [ -z "${SUDO_USER}" ]; then
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echo 'Environment variable $SUDO_USER required; Please run with `sudo`'
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exit 1
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fi
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if [ -z "${COMMAND}" ]; then
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COMMAND="create"
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fi
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if [ -z "${SUDO_USER}" ] && [ "${COMMAND}" != "list" ]; then
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echo 'Environment variable $SUDO_USER required; Please run with `sudo`'
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exit 1
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fi
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case "$(uname -s)" in
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Darwin)
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PLATFORM="OSX"
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@ -247,10 +467,18 @@ if [ "${COMMAND}" = 'create' ]; then
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create_tap || exit 1
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done
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activate_forwarding || exit 1
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up_bridge || exit 1
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add_ipv6_addrs || exit 1
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add_ipv6_routes || exit 1
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elif [ "${COMMAND}" = 'delete' ]; then
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del_ipv6_routes || exit 1
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del_ipv6_addrs || exit 1
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deactivate_forwarding || exit 1
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delete_bridge
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elif [ "${COMMAND}" = 'list' ]; then
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list_bridge $(get_master "$BRNAME")
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else
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echo 'unknown command'
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exit 1
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