diff options
Diffstat (limited to 'src/etc/dhcp/dhclient-exit-hooks.d/02-vyos-dhcp-renew-rfc3442')
| -rw-r--r-- | src/etc/dhcp/dhclient-exit-hooks.d/02-vyos-dhcp-renew-rfc3442 | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/etc/dhcp/dhclient-exit-hooks.d/02-vyos-dhcp-renew-rfc3442 b/src/etc/dhcp/dhclient-exit-hooks.d/02-vyos-dhcp-renew-rfc3442 new file mode 100644 index 000000000..9202fe72d --- /dev/null +++ b/src/etc/dhcp/dhclient-exit-hooks.d/02-vyos-dhcp-renew-rfc3442 @@ -0,0 +1,148 @@ +# support for RFC3442 routes in DHCP RENEW + +function convert_to_cidr () { + cidr="" + set -- $1 + while [ $# -gt 0 ]; do + net_length=$1 + + 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}.${5}" + shift 5 + ;; + *) # error + return 1 + ;; + esac + + cidr+="${net_address}/${net_length}:${gateway} " + done +} + +# main script starts here + +RUN="yes" + +if [ "$RUN" = "yes" ]; then + convert_to_cidr "$old_rfc3442_classless_static_routes" + old_cidr=$cidr + convert_to_cidr "$new_rfc3442_classless_static_routes" + new_cidr=$cidr + + if [ "$reason" = "RENEW" ]; then + if [ "$new_rfc3442_classless_static_routes" != "$old_rfc3442_classless_static_routes" ]; then + logmsg info "RFC3442 route change detected, old_routes: $old_rfc3442_classless_static_routes" + logmsg info "RFC3442 route change detected, new_routes: $new_rfc3442_classless_static_routes" + if [ -z "$new_rfc3442_classless_static_routes" ]; then + # delete all routes from the old_rfc3442_classless_static_routes + for route in $old_cidr; do + network=$(printf "${route}" | awk -F ":" '{print $1}') + gateway=$(printf "${route}" | awk -F ":" '{print $2}') + # take care of link-local routes + if [ "${gateway}" != '0.0.0.0' ]; then + via_arg="via ${gateway}" + else + via_arg="" + fi + ip -4 route del "${network}" "${via_arg}" dev "${interface}" >/dev/null 2>&1 + done + elif [ -z "$old_rfc3442_classless_static_routes" ]; then + # add all routes from the new_rfc3442_classless_static_routes + for route in $new_cidr; do + network=$(printf "${route}" | awk -F ":" '{print $1}') + gateway=$(printf "${route}" | awk -F ":" '{print $2}') + # take care of link-local routes + if [ "${gateway}" != '0.0.0.0' ]; then + via_arg="via ${gateway}" + else + via_arg="" + fi + ip -4 route add "${network}" "${via_arg}" dev "${interface}" >/dev/null 2>&1 + done + else + # update routes + # delete old + for old_route in $old_cidr; do + match="false" + for new_route in $new_cidr; do + if [[ "$old_route" == "$new_route" ]]; then + match="true" + break + fi + done + if [[ "$match" == "false" ]]; then + # delete old_route + network=$(printf "${old_route}" | awk -F ":" '{print $1}') + gateway=$(printf "${old_route}" | awk -F ":" '{print $2}') + # take care of link-local routes + if [ "${gateway}" != '0.0.0.0' ]; then + via_arg="via ${gateway}" + else + via_arg="" + fi + ip -4 route del "${network}" "${via_arg}" dev "${interface}" >/dev/null 2>&1 + fi + done + # add new + for new_route in $new_cidr; do + match="false" + for old_route in $old_cidr; do + if [[ "$new_route" == "$old_route" ]]; then + match="true" + break + fi + done + if [[ "$match" == "false" ]]; then + # add new_route + network=$(printf "${new_route}" | awk -F ":" '{print $1}') + gateway=$(printf "${new_route}" | awk -F ":" '{print $2}') + # take care of link-local routes + if [ "${gateway}" != '0.0.0.0' ]; then + via_arg="via ${gateway}" + else + via_arg="" + fi + ip -4 route add "${network}" "${via_arg}" dev "${interface}" >/dev/null 2>&1 + fi + done + fi + fi + fi +fi |