#!/bin/bash # Copyright 2021 Google LLC # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. [[ -n ${gbmc_br_from_ra_lib-} ]] && return # shellcheck source=meta-google/recipes-google/networking/network-sh/lib.sh source /usr/share/network/lib.sh || exit gbmc_br_from_ra_init= gbmc_br_from_ra_mac= declare -A gbmc_br_from_ra_pfxs=() declare -A gbmc_br_from_ra_prev_addrs=() gbmc_br_from_ra_update() { [[ -n $gbmc_br_from_ra_init && -n $gbmc_br_from_ra_mac ]] || return local pfx for pfx in "${!gbmc_br_from_ra_pfxs[@]}"; do local cidr if ! cidr="$(ip_pfx_to_cidr "$pfx")"; then unset 'gbmc_br_from_ra_pfxs[$pfx]' continue fi if (( cidr == 80 )); then local sfx if ! sfx="$(mac_to_eui48 "$gbmc_br_from_ra_mac")"; then unset 'gbmc_br_from_ra_pfxs[$pfx]' continue fi local addr if ! addr="$(ip_pfx_concat "$pfx" "$sfx")"; then unset 'gbmc_br_from_ra_pfxs[$pfx]' continue fi else unset 'gbmc_br_from_ra_pfxs[$pfx]' continue fi local valid="${gbmc_br_from_ra_pfxs["$pfx"]}" if (( valid > 0 )); then if [[ -z ${gbmc_br_from_ra_prev_addrs["$addr"]-} ]]; then echo "gBMC Bridge RA Addr Add: $addr" >&2 gbmc_br_from_ra_prev_addrs["$addr"]=1 fi ip addr replace "$addr" dev gbmcbr noprefixroute else if [[ -n ${gbmc_br_from_ra_prev_addrs["$addr"]-} ]]; then echo "gBMC Bridge RA Addr Del: $addr" >&2 unset 'gbmc_br_from_ra_prev_addrs[$addr]' fi ip addr del "$addr" dev gbmcbr unset 'gbmc_br_from_ra_pfxs[$pfx]' fi done } gbmc_br_from_ra_hook() { # shellcheck disable=SC2154 if [[ $change == init ]]; then gbmc_br_from_ra_init=1 gbmc_ip_monitor_defer elif [[ $change == defer ]]; then gbmc_br_from_ra_update elif [[ $change == route && $route != *' via '* ]] && [[ $route =~ ^(.* dev gbmcbr proto ra .*)( +expires +([^ ]+)sec).*$ ]]; then pfx="${route%% *}" # shellcheck disable=SC2154 if [[ $action == add ]]; then gbmc_br_from_ra_pfxs["$pfx"]="${BASH_REMATCH[3]}" gbmc_ip_monitor_defer elif [[ $action == del ]]; then gbmc_br_from_ra_pfxs["$pfx"]=0 gbmc_ip_monitor_defer fi elif [[ $change == link && $intf == gbmcbr ]]; then rdisc6 -m gbmcbr -r 1 -w 100 >/dev/null 2>&1 if [[ $action == add && $mac != "$gbmc_br_from_ra_mac" ]]; then gbmc_br_from_ra_mac="$mac" gbmc_ip_monitor_defer fi if [[ $action == del && $mac == "$gbmc_br_from_ra_mac" ]]; then gbmc_br_from_ra_mac= gbmc_ip_monitor_defer fi fi } GBMC_IP_MONITOR_HOOKS+=(gbmc_br_from_ra_hook) gbmc_br_from_ra_lib=1