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# 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.
[ -z "${gbmc_ncsi_br_pub_addr_lib-}" ] || return
gbmc_ncsi_br_pub_addr_init=
gbmc_ncsi_br_pub_addr_lastip=
gbmc_ncsi_br_pub_addr_confip=
gbmc_ncsi_br_pub_addr_update() {
[ -n "$gbmc_ncsi_br_pub_addr_init" ] || return
[ "$gbmc_ncsi_br_pub_addr_confip" != "$gbmc_ncsi_br_pub_addr_lastip" ] || return
gbmc_ncsi_br_pub_addr_confip="$gbmc_ncsi_br_pub_addr_lastip"
printf 'gBMC Bridge Pub Addr from NCSI: %s\n' \
"${gbmc_ncsi_br_pub_addr_lastip:-(deleted)}" >&2
local pfx_bytes=()
if [ -n "$gbmc_ncsi_br_pub_addr_lastip" ]; then
ip_to_bytes pfx_bytes "$gbmc_ncsi_br_pub_addr_lastip"
# Ensure we don't have more than a /64 address
local i
for (( i = 8; i < 16; ++i )); do
if (( pfx_bytes[$i] != 0 )); then
pfx_bytes=()
break
fi
done
fi
local contents=
if (( ${#pfx_bytes[@]} != 0 )); then
pfx_bytes[8]=0xfd
local stateless_pfx="$(ip_bytes_to_str pfx_bytes)"
pfx_bytes[9]=0x01
local ncsi_pfx="$(ip_bytes_to_str pfx_bytes)"
read -r -d '' contents <<EOF
[Network]
Address=$ncsi_pfx/128
IPv6PrefixDelegation=yes
[IPv6PrefixDelegation]
RouterLifetimeSec=60
[IPv6Prefix]
Prefix=$stateless_pfx/80
PreferredLifetimeSec=60
ValidLifetimeSec=60
[IPv6RoutePrefix]
Route=$ncsi_pfx/80
LifetimeSec=60
[Route]
Destination=$stateless_pfx/76
Type=unreachable
Metric=1024
EOF
# Delete DHCP configured addresses if we have a host published address
rm -f /etc/systemd/network/{00,}-bmc-gbmcbr.network.d/50-public.conf
fi
local file
for file in /run/systemd/network/{00,}-bmc-gbmcbr.network.d/50-public.conf; do
mkdir -p -m 755 "$(dirname "$file")"
if [ -z "$contents" ]; then
rm -f "$file"
else
printf '%s' "$contents" >"$file"
fi
done
# Ensure that systemd-networkd performs a reconfiguration as it doesn't
# currently check the mtime of drop-in files.
touch -c /lib/systemd/network/*-bmc-gbmcbr.network
if [ "$(systemctl is-active systemd-networkd)" != 'inactive' ]; then
networkctl reload
networkctl reconfigure gbmcbr
fi
}
gbmc_ncsi_br_pub_addr_hook() {
if [ "$change" = 'init' ]; then
gbmc_ncsi_br_pub_addr_init=1
gbmc_ip_monitor_defer
elif [ "$change" = 'defer' ]; then
gbmc_ncsi_br_pub_addr_update
elif [ "$change" = 'addr' -a "$intf" = '@NCSI_IF@' ] &&
[ "$scope" = 'global' -a "$fam" = 'inet6' ] &&
[[ "$flags" != *deprecated* ]]; then
if [ "$action" = 'add' -a "$ip" != "$gbmc_ncsi_br_pub_addr_lastip" ]; then
gbmc_ncsi_br_pub_addr_lastip="$ip"
gbmc_ip_monitor_defer
fi
if [ "$action" = 'del' -a "$ip" = "$gbmc_ncsi_br_pub_addr_lastip" ]; then
gbmc_ncsi_br_pub_addr_lastip=
gbmc_ip_monitor_defer
fi
fi
}
GBMC_IP_MONITOR_HOOKS+=(gbmc_ncsi_br_pub_addr_hook)
gbmc_ncsi_br_pub_addr_lib=1
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