1# Copyright 2021 Google LLC 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15[ -z "${gbmc_br_from_ra_lib-}" ] || return 16 17source /usr/share/network/lib.sh || exit 18 19gbmc_br_from_ra_init= 20gbmc_br_from_ra_mac= 21declare -A gbmc_br_from_ra_pfxs=() 22declare -A gbmc_br_from_ra_prev_addrs=() 23 24gbmc_br_from_ra_update() { 25 [ -n "$gbmc_br_from_ra_init" -a -n "$gbmc_br_from_ra_mac" ] || return 26 27 local pfx 28 for pfx in "${!gbmc_br_from_ra_pfxs[@]}"; do 29 local cidr 30 if ! cidr="$(ip_pfx_to_cidr "$pfx")"; then 31 unset 'gbmc_br_from_ra_pfxs[$pfx]' 32 continue 33 fi 34 if (( cidr == 80 )); then 35 local sfx 36 if ! sfx="$(mac_to_eui48 "$gbmc_br_from_ra_mac")"; then 37 unset 'gbmc_br_from_ra_pfxs[$pfx]' 38 continue 39 fi 40 local addr 41 if ! addr="$(ip_pfx_concat "$pfx" "$sfx")"; then 42 unset 'gbmc_br_from_ra_pfxs[$pfx]' 43 continue 44 fi 45 else 46 unset 'gbmc_br_from_ra_pfxs[$pfx]' 47 continue 48 fi 49 local valid="${gbmc_br_from_ra_pfxs["$pfx"]}" 50 if (( valid > 0 )); then 51 if [ -z "${gbmc_br_from_ra_prev_addrs["$addr"]-}" ]; then 52 echo "gBMC Bridge RA Addr Add: $addr" >&2 53 gbmc_br_from_ra_prev_addrs["$addr"]=1 54 fi 55 ip addr replace "$addr" dev gbmcbr noprefixroute 56 else 57 if [ -n "${gbmc_br_from_ra_prev_addrs["$addr"]-}" ]; then 58 echo "gBMC Bridge RA Addr Del: $addr" >&2 59 unset 'gbmc_br_from_ra_prev_addrs[$addr]' 60 fi 61 ip addr del "$addr" dev gbmcbr 62 unset 'gbmc_br_from_ra_pfxs[$pfx]' 63 fi 64 done 65} 66 67gbmc_br_from_ra_hook() { 68 if [ "$change" = 'init' ]; then 69 gbmc_br_from_ra_init=1 70 gbmc_br_from_ra_update 71 elif [[ "$change" == 'route' && "$route" != *' via '* ]] && 72 [[ "$route" =~ ^(.* dev gbmcbr proto ra .*)( +expires +([^ ]+)sec).*$ ]]; then 73 pfx="${route%% *}" 74 if [ "$action" = 'add' ]; then 75 gbmc_br_from_ra_pfxs["$pfx"]="${BASH_REMATCH[3]}" 76 gbmc_br_from_ra_update 77 elif [ "$action" = 'del' ]; then 78 gbmc_br_from_ra_pfxs["$pfx"]=0 79 gbmc_br_from_ra_update 80 fi 81 elif [ "$change" = 'link' -a "$intf" = 'gbmcbr' ]; then 82 rdisc6 -m gbmcbr -r 1 -w 100 >/dev/null 2>&1 83 if [ "$action" = 'add' -a "$mac" != "$gbmc_br_from_ra_mac" ]; then 84 gbmc_br_from_ra_mac="$mac" 85 gbmc_br_from_ra_update 86 fi 87 if [ "$action" = 'del' -a "$mac" = "$gbmc_br_from_ra_mac" ]; then 88 gbmc_br_from_ra_mac= 89 gbmc_br_from_ra_update 90 fi 91 fi 92} 93 94GBMC_IP_MONITOR_HOOKS+=(gbmc_br_from_ra_hook) 95 96gbmc_br_from_ra_lib=1 97