diff options
Diffstat (limited to 'meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-deprecated-ips.sh.in')
-rw-r--r-- | meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-deprecated-ips.sh.in | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-deprecated-ips.sh.in b/meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-deprecated-ips.sh.in new file mode 100644 index 000000000..9d9f7899e --- /dev/null +++ b/meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-deprecated-ips.sh.in @@ -0,0 +1,130 @@ +# 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 "${gbmc_ncsi_br_deprecated_ips_lib-}" ] || return + +source /usr/share/network/lib.sh || exit + +gbmc_ncsi_br_deprecated_ips_init= +gbmc_ncsi_br_deprecated_ips_confip= +gbmc_ncsi_br_deprecated_ips_lastip= + +gbmc_ncsi_br_deprecated_ips_update() { + [ -n "$gbmc_ncsi_br_deprecated_ips_init" ] || return + [ "$gbmc_ncsi_br_deprecated_ips_confip" != "$gbmc_ncsi_br_deprecated_ips_lastip" ] || return + gbmc_ncsi_br_deprecated_ips_confip="$gbmc_ncsi_br_deprecated_ips_lastip" + + printf 'gBMC Bridge NCSI Deprecated Addrs: %s\n' \ + "${gbmc_ncsi_br_deprecated_ips_lastip:-(deleted)}" >&2 + + local contents= + local nfcontents= + if [ -n "$gbmc_ncsi_br_deprecated_ips_lastip" ]; then + local pfx_bytes=() + ip_to_bytes pfx_bytes "$gbmc_ncsi_br_deprecated_ips_lastip" + + local pfx="$(ip_bytes_to_str pfx_bytes)" + (( pfx_bytes[9] &= 0xf0 )) + local stateless_pfx="$(ip_bytes_to_str pfx_bytes)" + pfx_bytes[8]=0 + pfx_bytes[9]=0 + local host_pfx="$(ip_bytes_to_str pfx_bytes)" + read -r -d '' contents <<EOF +[Address] +Address=$pfx/128 +PreferredLifetime=0 +[Address] +Address=$stateless_pfx/128 +PreferredLifetime=0 +[Address] +Address=$host_pfx/128 +PreferredLifetime=0 +EOF + read -r -d '' nfcontents <<EOF +table inet filter { + chain ncsi_input { + ip6 saddr != $pfx/76 ip6 daddr $pfx/76 goto ncsi_gbmc_br_pub_input + } + chain ncsi_forward { + ip6 saddr != $pfx/76 ip6 daddr $pfx/76 accept + } +} +EOF + fi + + local file + for file in /run/systemd/network/{00,}-bmc-@NCSI_IF@.network.d/50-deprecated.conf; do + mkdir -p -m 755 "$(dirname "$file")" + if [ -z "$contents" ]; then + rm -f "$file" + else + printf '%s' "$contents" >"$file" + fi + done + + # Ensure that systemd-networkd performs a reconfiguration as it doesn't + # currently check the mtime of drop-in files. + touch -c /etc/systemd/network/*-bmc-@NCSI_IF@.network + + if [ "$(systemctl is-active systemd-networkd)" != 'inactive' ]; then + networkctl reload && networkctl reconfigure @NCSI_IF@ + fi + + local rfile=/run/nftables/40-gbmc-ncsi-br.rules + mkdir -p -m 755 "$(dirname "$rfile")" + if [ -z "$nfcontents" ]; then + rm -f "$rfile" + else + printf '%s' "$nfcontents" >"$rfile" + fi + systemctl reset-failed nftables && systemctl --no-block reload-or-restart nftables || true +} + +gbmc_ncsi_br_deprecated_ips_hook() { + if [ "$change" = 'init' ]; then + gbmc_ncsi_br_deprecated_ips_init=1 + gbmc_ip_monitor_defer + elif [ "$change" = 'defer' ]; then + gbmc_ncsi_br_deprecated_ips_update + elif [ "$change" = 'addr' -a "$intf" = 'gbmcbr' ] && + [ "$scope" = 'global' -a "$fam" = 'inet6' ]; then + local pfx_bytes=() + ip_to_bytes pfx_bytes "$ip" || return + # No ULA Addresses + if (( pfx_bytes[0] & 0xfe == 0xfc )); then + return + fi + # We only want to allow a <pfx>::fd0x address, where x>0 + if (( pfx_bytes[8] != 0xfd || pfx_bytes[9] & 0xf == 0 )); then + return + fi + for (( i = 10; i < 16; ++i )); do + if (( pfx_bytes[i] != 0 )); then + return + fi + done + if [ "$action" = 'add' -a "$ip" != "$gbmc_ncsi_br_deprecated_ips_lastip" ]; then + gbmc_ncsi_br_deprecated_ips_lastip="$ip" + gbmc_ip_monitor_defer + fi + if [ "$action" = 'del' -a "$ip" = "$gbmc_ncsi_br_deprecated_ips_lastip" ]; then + gbmc_ncsi_br_deprecated_ips_lastip= + gbmc_ip_monitor_defer + fi + fi +} + +GBMC_IP_MONITOR_HOOKS+=(gbmc_ncsi_br_deprecated_ips_hook) + +gbmc_ncsi_br_deprecated_ips_lib=1 |