Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
48 lines
1.3 KiB
Bash
Executable File
48 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# Ensures broadcast route MTU is respected
|
|
|
|
CLIENT_NS=$(mktemp -u client-XXXXXXXX)
|
|
CLIENT_IP4="192.168.0.1/24"
|
|
CLIENT_BROADCAST_ADDRESS="192.168.0.255"
|
|
|
|
SERVER_NS=$(mktemp -u server-XXXXXXXX)
|
|
SERVER_IP4="192.168.0.2/24"
|
|
|
|
setup() {
|
|
ip netns add "${CLIENT_NS}"
|
|
ip netns add "${SERVER_NS}"
|
|
|
|
ip -net "${SERVER_NS}" link add link1 type veth peer name link0 netns "${CLIENT_NS}"
|
|
|
|
ip -net "${CLIENT_NS}" link set link0 up
|
|
ip -net "${CLIENT_NS}" link set link0 mtu 9000
|
|
ip -net "${CLIENT_NS}" addr add "${CLIENT_IP4}" dev link0
|
|
|
|
ip -net "${SERVER_NS}" link set link1 up
|
|
ip -net "${SERVER_NS}" link set link1 mtu 1500
|
|
ip -net "${SERVER_NS}" addr add "${SERVER_IP4}" dev link1
|
|
|
|
read -r -a CLIENT_BROADCAST_ENTRY <<< "$(ip -net "${CLIENT_NS}" route show table local type broadcast)"
|
|
ip -net "${CLIENT_NS}" route del "${CLIENT_BROADCAST_ENTRY[@]}"
|
|
ip -net "${CLIENT_NS}" route add "${CLIENT_BROADCAST_ENTRY[@]}" mtu 1500
|
|
|
|
ip net exec "${SERVER_NS}" sysctl -wq net.ipv4.icmp_echo_ignore_broadcasts=0
|
|
}
|
|
|
|
cleanup() {
|
|
ip -net "${SERVER_NS}" link del link1
|
|
ip netns del "${CLIENT_NS}"
|
|
ip netns del "${SERVER_NS}"
|
|
}
|
|
|
|
trap cleanup EXIT
|
|
|
|
setup &&
|
|
echo "Testing for broadcast route MTU" &&
|
|
ip net exec "${CLIENT_NS}" ping -f -M want -q -c 1 -s 8000 -w 1 -b "${CLIENT_BROADCAST_ADDRESS}" > /dev/null 2>&1
|
|
|
|
exit $?
|
|
|