diff options
Diffstat (limited to 'src/etc/dhcp/dhclient-exit-hooks.d/01-vyos-cleanup')
| -rw-r--r-- | src/etc/dhcp/dhclient-exit-hooks.d/01-vyos-cleanup | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/src/etc/dhcp/dhclient-exit-hooks.d/01-vyos-cleanup b/src/etc/dhcp/dhclient-exit-hooks.d/01-vyos-cleanup index ce846f6c3..88a4d9db9 100644 --- a/src/etc/dhcp/dhclient-exit-hooks.d/01-vyos-cleanup +++ b/src/etc/dhcp/dhclient-exit-hooks.d/01-vyos-cleanup @@ -1,12 +1,74 @@ +# NOTE: here we use 'ip' wrapper, therefore a route will be actually deleted via /usr/sbin/ip or vtysh, according to the system state + if [[ $reason =~ (EXPIRE|FAIL|RELEASE|STOP) ]]; then # delete dynamic nameservers from a configuration if lease was deleted logmsg info "Deleting nameservers with tag \"dhcp-${interface}\" via vyos-hostsd-client" vyos-hostsd-client --delete-name-servers --tag dhcp-${interface} - # try to delete default ip route (NOTE: here we use 'ip' wrapper, therefore a route will be actually deleted via /usr/sbin/ip or vtysh, according to the system state) + # try to delete default ip route for router in $old_routers; do logmsg info "Deleting default route: via $router dev ${interface}" ip -4 route del default via $router dev ${interface} done + # delete rfc3442 routes + if [ -n "$old_rfc3442_classless_static_routes" ]; then + set -- $old_rfc3442_classless_static_routes + while [ $# -gt 0 ]; do + net_length=$1 + via_arg='' + case $net_length in + 32|31|30|29|28|27|26|25) + if [ $# -lt 9 ]; then + return 1 + fi + net_address="${2}.${3}.${4}.${5}" + gateway="${6}.${7}.${8}.${9}" + shift 9 + ;; + 24|23|22|21|20|19|18|17) + if [ $# -lt 8 ]; then + return 1 + fi + net_address="${2}.${3}.${4}.0" + gateway="${5}.${6}.${7}.${8}" + shift 8 + ;; + 16|15|14|13|12|11|10|9) + if [ $# -lt 7 ]; then + return 1 + fi + net_address="${2}.${3}.0.0" + gateway="${4}.${5}.${6}.${7}" + shift 7 + ;; + 8|7|6|5|4|3|2|1) + if [ $# -lt 6 ]; then + return 1 + fi + net_address="${2}.0.0.0" + gateway="${3}.${4}.${5}.${6}" + shift 6 + ;; + 0) # default route + if [ $# -lt 5 ]; then + return 1 + fi + net_address="0.0.0.0" + gateway="${2}.${3}.${4}.${5}" + shift 5 + ;; + *) # error + return 1 + ;; + esac + # take care of link-local routes + if [ "${gateway}" != '0.0.0.0' ]; then + via_arg="via ${gateway}" + fi + # delete route (ip detects host routes automatically) + ip -4 route del "${net_address}/${net_length}" \ + ${via_arg} dev "${interface}" >/dev/null 2>&1 + done + fi fi if [[ $reason =~ (EXPIRE6|RELEASE6|STOP6) ]]; then |