meta-google/recipes-google/ncsi/files/gbmc-ncsi-ra.sh

#!/bin/bash
# Copyright 2024 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.

# shellcheck source=meta-google/recipes-google/networking/gbmc-net-common/gbmc-net-lib.sh
source /usr/share/gbmc-net-lib.sh || exit
# shellcheck source=meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-lib.sh
source /usr/share/gbmc-br-lib.sh || exit

RA_IF=$1
IP_OFFSET=1
# NCSI is known to be closer to the ToR than bridge routes. Prefer over bridge routes.
ROUTE_METRIC=900
ROUTE_TABLE=900

update_rtr() {
  local op="${3-add}"
  busctl set-property xyz.openbmc_project.Network /xyz/openbmc_project/network/"$RA_IF" \
    xyz.openbmc_project.Network.EthernetInterface DefaultGateway6 s "" || true

  # It's important that this happens before the main table default router is configured.
  # Otherwise, the IP source determination logic won't be able to pick the best route.
  if [[ ${op} == "add" ]]; then
    # Add additional gateway information
    for file in /run/systemd/network/{00,}-bmc-$RA_IF.network; do
      mkdir -p "$file.d"
      printf '[Route]\nGateway=%s\nGatewayOnLink=true\nMetric=512\nTable=%d' \
        "$rtr" "$ROUTE_TABLE" >"$file.d"/10-gateway-table.conf
    done

    ip -6 route replace default via "$rtr" onlink dev "$RA_IF" metric 512 table "$ROUTE_TABLE" || \
      gbmc_net_networkd_reload "$RA_IF"
  fi

  default_update_rtr "$@"
}

ncsi_is_active() {
  systemctl is-active -q nic-hostless@"$RA_IF".target && return
  systemctl is-active -q nic-hostful@"$RA_IF".target && return
  return 1
}

update_fqdn() {
  true
}

update_pfx() {
  local pfx="$1"

  # We only do this for smartNICs (which don't use NCSI)
  ncsi_is_active && return

  # Don't change anything for an empty prefix
  [ -z "$pfx" ] && return

  # We no longer need NCSId if we are in this configuration
  systemctl stop --no-block ncsid@"$RA_IF" || true

  # DHCP Relay workaround until alternate source port is supported
  # TODO: Remove this once internal relaying cleanups land
  gbmc-ncsi-smartnic-wa.sh || true

  gbmc_br_set_runtime_ip ncsi-ra "$pfx"
}

# shellcheck source=meta-google/recipes-google/networking/gbmc-net-common/gbmc-ra.sh
source /usr/share/gbmc-ra.sh || exit