blob: e8f3599050c5f195cc9f0f53d6702e488f313a43 [file] [log] [blame]
#!/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.
source "$(dirname "${BASH_SOURCE[0]}")"/ncsid_lib.sh
NCSI_IF="$1"
old_rtr=
old_mac=
function set_rtr() {
[ -n "$rtr" -a -n "$lifetime" ] || return
[ "$rtr" != "$old_rtr" -a "$mac" != "$old_mac" ] || return
# Only valid default routers can be considered, 0 lifetime implies
# a non-default router
(( lifetime > 0 )) || return
echo "Setting default router: $rtr at $mac" >&2
local svc=xyz.openbmc_project.Network
SetStatic "$svc" "$NCSI_IF" || return
UpdateGateway "$svc" "$NCSI_IF" "$rtr" || return
UpdateNeighbor "$svc" "$NCSI_IF" "$rtr" "$mac" || return
retries=-1
old_mac="$mac"
old_rtr="$rtr"
}
retries=1
w=60
while true; do
start=$SECONDS
args=(-m "$NCSI_IF" -w $(( w * 1000 )))
if (( retries > 0 )); then
args+=(-r "$retries")
else
args+=(-d)
fi
while read line; do
if [ -z "$line" ]; then
lifetime=
mac=
elif [[ "$line" =~ ^Router' 'lifetime' '*:' '*([0-9]*) ]]; then
lifetime="${BASH_REMATCH[1]}"
elif [[ "$line" =~ ^Source' 'link-layer' 'address' '*:' '*([a-fA-F0-9:]*)$ ]]; then
mac="${BASH_REMATCH[1]}"
elif [[ "$line" =~ ^from' '(.*)$ ]]; then
rtr="${BASH_REMATCH[1]}"
set_rtr || true
lifetime=
mac=
rtr=
fi
done < <(exec rdisc6 "${args[@]}" 2>/dev/null)
# If rdisc6 exits early we still want to wait the full `w` time before
# starting again.
(( timeout = start + w - SECONDS ))
sleep $(( timeout < 0 ? 0 : timeout ))
done