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