Initial commit

meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-ula.sh

@@ -0,0 +1,74 @@
+#!/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_ula_lib-} ]] && return
+
+# shellcheck source=meta-google/recipes-google/networking/network-sh/lib.sh
+source /usr/share/network/lib.sh || exit
+
+gbmc_br_ula_init=
+gbmc_br_ula_mac=
+
+gbmc_br_ula_update() {
+  [[ -n $gbmc_br_ula_init ]] || return
+
+  echo "gBMC Bridge ULA MAC: ${gbmc_br_ula_mac:-(deleted)}" >&2
+
+  local addr=
+  contents='[Network]'$'\n'
+  if [[ -n $gbmc_br_ula_mac ]]; then
+    local sfx
+    if sfx="$(mac_to_eui64 "$gbmc_br_ula_mac")" &&
+       addr="$(ip_pfx_concat "fdb5:0481:10ce::/64" "$sfx")"; then
+      contents+="Address=$addr"$'\n'
+    fi
+  fi
+
+  local netfile
+  for netfile in /run/systemd/network/{00,}-bmc-gbmcbr.network.d/60-ula.conf; do
+    mkdir -p "$(dirname "$netfile")"
+    printf '%s' "$contents" >"$netfile"
+  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_br_ula_hook() {
+  # shellcheck disable=SC2154
+  if [[ $change == init ]]; then
+    gbmc_br_ula_init=1
+    gbmc_br_ula_update
+  elif [[ $change == link && $intf == gbmcbr ]]; then
+    if [[ $action == add && $mac != "$gbmc_br_ula_mac" ]]; then
+      gbmc_br_ula_mac="$mac"
+      gbmc_br_ula_update
+    fi
+    if [[ $action == del && $mac == "$gbmc_br_ula_mac" ]]; then
+      gbmc_br_ula_mac=
+      gbmc_br_ula_update
+    fi
+  fi
+}
+
+GBMC_IP_MONITOR_HOOKS+=(gbmc_br_ula_hook)
+
+gbmc_br_ula_lib=1