134 lines
3.3 KiB
Bash
134 lines
3.3 KiB
Bash
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#!/bin/bash
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# Copyright 2022 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_lib_init-}" ] && return
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# SC can't find this path during repotest
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# shellcheck disable=SC1091
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source /usr/share/network/lib.sh || exit
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# A list of functions which get executed for each configured IP.
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# These are configured by the files included below.
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# Shellcheck does not understand how this gets referenced
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# shellcheck disable=SC2034
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GBMC_BR_LIB_SET_IP_HOOKS=()
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gbmc_br_source_dir() {
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local dir="$1"
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local file
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while read -r -d $'\0' file; do
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# SC doesn't like dynamic source loading
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# shellcheck disable=SC1090
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source "$file" || return
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done < <(shopt -s nullglob; for f in "$dir"/*.sh; do printf '%s\0' "$f"; done)
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}
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# Load configurations from a known location in the filesystem to populate
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# hooks that are executed after each event.
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gbmc_br_source_dir /usr/share/gbmc-br-lib || exit
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gbmc_br_run_hooks() {
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local -n hookvar="$1"
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shift
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local hook
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for hook in "${hookvar[@]}"; do
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"$hook" "$@" || return
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done
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}
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gbmc_br_reload() {
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if [ "$(systemctl is-active systemd-networkd)" != 'inactive' ]; then
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networkctl reload && networkctl reconfigure gbmcbr
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fi
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}
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gbmc_br_no_ip() {
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echo "Runtime removing gbmcbr IP" >&2
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rm -f /run/systemd/network/{00,}-bmc-gbmcbr.network.d/50-public.conf
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gbmc_br_reload
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}
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gbmc_br_reload_ip() {
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local ip="${1-}"
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if [ -z "$ip" ] && ! ip="$(cat /var/google/gbmc-br-ip 2>/dev/null)"; then
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echo "Ignoring unconfigured IP" >&2
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gbmc_br_no_ip
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return 0
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fi
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# Remove legacy network configuration
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rm -rf /etc/systemd/network/{00,}-bmc-gbmcbr.network.d
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local pfx_bytes=()
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if ! ip_to_bytes pfx_bytes "$ip"; then
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echo "Ignoring Invalid IPv6: $ip" >&2
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gbmc_br_no_ip
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return 0
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fi
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local pfx
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pfx="$(ip_bytes_to_str pfx_bytes)"
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(( pfx_bytes[9] &= 0xf0 ))
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local stateless_pfx
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stateless_pfx="$(ip_bytes_to_str pfx_bytes)"
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local contents
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read -r -d '' contents <<EOF
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[Network]
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Address=$pfx/128
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[IPv6Prefix]
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Prefix=$stateless_pfx/80
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PreferredLifetimeSec=60
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ValidLifetimeSec=60
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[IPv6RoutePrefix]
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Route=$pfx/80
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LifetimeSec=60
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[Route]
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Destination=$stateless_pfx/76
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Type=unreachable
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Metric=1024
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EOF
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echo "Runtime setting gbmcbr IP: $pfx" >&2
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local file
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for file in /run/systemd/network/{00,}-bmc-gbmcbr.network.d/50-public.conf; do
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mkdir -p "$(dirname "$file")"
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printf '%s' "$contents" >"$file"
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done
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gbmc_br_reload
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}
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gbmc_br_set_ip() {
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local ip="${1-}"
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local old_ip=
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if [ -n "$ip" ]; then
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old_ip="$(cat /var/google/gbmc-br-ip 2>/dev/null)"
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[ "$old_ip" == "$ip" ] && return
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mkdir -p /var/google || return
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echo "$ip" >/var/google/gbmc-br-ip || return
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else
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[ ! -f "/var/google/gbmc-br-ip" ] && return
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rm -rf /var/google/gbmc-br-ip
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fi
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gbmc_br_run_hooks GBMC_BR_LIB_SET_IP_HOOKS "$ip" || return
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gbmc_br_reload_ip "$ip"
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}
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gbmc_br_lib_init=1
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