#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Validate cached routes in fib{6}_nh that is used by multiple prefixes. # Validate a different # exception is generated in h0 for each remote host. # # h1 # / # h0 - r1 - h2 # \ # h3 # # routing in h0 to hN is done with nexthop objects.
log_test()
{
local rc=$1
local expected=$2
local msg="$3"
if [ ${rc} -eq ${expected} ]; then
printf "TEST: %-60s [ OK ]\n""${msg}"
nsuccess=$((nsuccess+1)) else
ret=1
nfail=$((nfail+1))
printf "TEST: %-60s [FAIL]\n""${msg}" if [ "${PAUSE_ON_FAIL}" = "yes" ]; then echo echo"hit enter to continue, 'q' to quit"
read a
[ "$a" = "q" ] && exit 1 fi fi
[ "$VERBOSE" = "1" ] && echo
}
run_cmd()
{
local cmd="$*"
local out
local rc
if [ "$VERBOSE" = "1" ]; then echo"COMMAND: $cmd" fi
out=$(eval $cmd 2>&1)
rc=$? if [ "$VERBOSE" = "1" -a -n "$out" ]; then echo"$out" fi
ip netns exec ${ns} sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1
case ${ns} in
h*)
ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0
;;
r*)
ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1
ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1
;;
esac
}
setup()
{
local ns
local i
#set -e
setup_ns h0 r1 h1 h2 h3
h[0]=$h0
h[1]=$h1
h[2]=$h2
h[3]=$h3
r[1]=$r1 for ns in ${h[0]} ${r[1]} ${h[1]} ${h[2]} ${h[3]} do
create_ns ${ns} done
# # create interconnects #
for i in 0 1 2 3 do
ip -netns ${h[$i]} li add eth0 type veth peer name r1h${i}
ip -netns ${h[$i]} li set eth0 up
ip -netns ${h[$i]} li set r1h${i} netns ${r[1]} name eth${i} up
ip -netns ${h[$i]} addr add dev eth0 172.16.10${i}.1/24
ip -netns ${h[$i]} -6 addr add dev eth0 2001:db8:10${i}::1/64
ip -netns ${r[1]} addr add dev eth${i} 172.16.10${i}.254/24
ip -netns ${r[1]} -6 addr add dev eth${i} 2001:db8:10${i}::64/64 done
ip -netns ${h[0]} nexthop add id 4 via 172.16.100.254 dev eth0
ip -netns ${h[0]} nexthop add id 6 via 2001:db8:100::64 dev eth0
# routing from ${h[0]} to h1-h3 and back for i in 1 2 3 do
ip -netns ${h[0]} ro add 172.16.10${i}.0/24 nhid 4
ip -netns ${h[$i]} ro add 172.16.100.0/24 via 172.16.10${i}.254
ip -netns ${h[0]} -6 ro add 2001:db8:10${i}::/64 nhid 6
ip -netns ${h[$i]} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64 done
if [ "$VERBOSE" = "1" ]; then echo echo"host 1 config"
ip -netns ${h[0]} li sh
ip -netns ${h[0]} ro sh
ip -netns ${h[0]} -6 ro sh fi
#set +e
}
cleanup()
{
cleanup_all_ns
}
change_mtu()
{
local hostid=$1
local mtu=$2
run_cmd ip -netns h${hostid} li set eth0 mtu ${mtu}
run_cmd ip -netns ${r1} li set eth${hostid} mtu ${mtu}
}
validate_v4_exception()
{
local i=$1
local mtu=$2
local ping_sz=$3
local dst="172.16.10${i}.1"
local h0_ip=172.16.100.1
local r1_ip=172.16.100.254
local rc
if [ ${ping_sz} != "0" ]; then
run_cmd ip netns exec ${h0} ping -s ${ping_sz} -c5 -w5 ${dst} fi
if [ "$VERBOSE" = "1" ]; then echo"Route get"
ip -netns ${h0} ro get ${dst} echo"Searching for:" echo" cache .* mtu ${mtu}" echo fi
ip -netns ${h0} ro get ${dst} | \
grep -q "cache .* mtu ${mtu}"
rc=$?
log_test $rc 0 "IPv4: host 0 to host ${i}, mtu ${mtu}"
}
validate_v6_exception()
{
local i=$1
local mtu=$2
local ping_sz=$3
local dst="2001:db8:10${i}::1"
local h0_ip=2001:db8:100::1
local r1_ip=2001:db8:100::64
local rc
if [ ${ping_sz} != "0" ]; then
run_cmd ip netns exec ${h0} ${ping6} -s ${ping_sz} -c5 -w5 ${dst} fi
if [ "$VERBOSE" = "1" ]; then echo"Route get"
ip -netns ${h0} -6 ro get ${dst} echo"Searching for:" echo" ${dst}.* via ${r1_ip} dev eth0 src ${h0_ip} .* mtu ${mtu}" echo fi
ip -netns ${h0} -6 ro get ${dst} | \
grep -q "${dst}.* via ${r1_ip} dev eth0 src ${h0_ip} .* mtu ${mtu}"
rc=$?
log_test $rc 0 "IPv6: host 0 to host ${i}, mtu ${mtu}"
}
################################################################################ # main
while getopts :pv o do
case $o in
p) PAUSE_ON_FAIL=yes;;
v) VERBOSE=1;;
esac done
cleanup
setup
sleep 2
cpus=$(cat /sys/devices/system/cpu/online)
cpus="$(seq ${cpus/-/ })"
ret=0 for i in 1 2 3 do # generate a cached route per-cpu for c in ${cpus}; do
run_cmd taskset -c ${c} ip netns exec ${h0} ping -c1 -w1 172.16.10${i}.1
[ $? -ne 0 ] && printf "\nERROR: ping to ${h[$i]} failed\n" && ret=1
if [ $ret -eq 0 ]; then # generate different exceptions in h0 for h1, h2 and h3
change_mtu 1 1300
validate_v4_exception 1 1300 1350
validate_v6_exception 1 1300 1350 echo
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