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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
source lib.sh
IP4=172.16.0.1/24
TGT4=172.16.0.2
IP6=2001:db8:1::1/64
TGT6=2001:db8:1::2
TMPF=$(mktemp --suffix ".pcap")
cleanup()
{
rm -f $TMPF
cleanup_ns $NS
}
trap cleanup EXIT
tcpdump -h | grep immediate-mode >> /dev/null
if [ $? -ne 0 ]; then
echo "SKIP - tcpdump with --immediate-mode option required"
exit $ksft_skip
fi
# Namespaces
setup_ns NS
NSEXE="ip netns exec $NS"
$NSEXE sysctl -w net.ipv4.ping_group_range='0 2147483647' > /dev/null
# Connectivity
ip -netns $NS link add type dummy
ip -netns $NS link set dev dummy0 up
ip -netns $NS addr add $IP4 dev dummy0
ip -netns $NS addr add $IP6 dev dummy0
# Test
BAD=0
TOTAL=0
check_result() {
((TOTAL++))
if [ $1 -ne $2 ]; then
echo " Case $3 returned $1, expected $2"
((BAD++))
fi
}
# IPV6_DONTFRAG
for ovr in setsock cmsg both diff; do
for df in 0 1; do
for p in u U i r; do
[ $p == "u" ] && prot=UDP
[ $p == "U" ] && prot=UDP
[ $p == "i" ] && prot=ICMP
[ $p == "r" ] && prot=RAW
[ $ovr == "setsock" ] && m="-F $df"
[ $ovr == "cmsg" ] && m="-f $df"
[ $ovr == "both" ] && m="-F $df -f $df"
[ $ovr == "diff" ] && m="-F $((1 - df)) -f $df"
$NSEXE ./cmsg_sender -s -S 2000 -6 -p $p $m $TGT6 1234
check_result $? $df "DONTFRAG $prot $ovr"
done
done
done
# IP_TOS + IPV6_TCLASS
test_dscp() {
local -r IPVER=$1
local -r TGT=$2
local -r MATCH=$3
local -r TOS=0x10
local -r TOS2=0x20
local -r ECN=0x3
ip $IPVER -netns $NS rule add tos $TOS lookup 300
ip $IPVER -netns $NS route add table 300 prohibit any
for ovr in setsock cmsg both diff; do
for p in u U i r; do
[ $p == "u" ] && prot=UDP
[ $p == "U" ] && prot=UDP
[ $p == "i" ] && prot=ICMP
[ $p == "r" ] && prot=RAW
[ $ovr == "setsock" ] && m="-C"
[ $ovr == "cmsg" ] && m="-c"
[ $ovr == "both" ] && m="-C $((TOS2)) -c"
[ $ovr == "diff" ] && m="-C $((TOS )) -c"
$NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
BG=$!
sleep 0.05
$NSEXE ./cmsg_sender $IPVER -p $p $m $((TOS2)) $TGT 1234
check_result $? 0 "$MATCH $prot $ovr - pass"
while [ -d /proc/$BG ]; do
$NSEXE ./cmsg_sender $IPVER -p $p $m $((TOS2)) $TGT 1234
done
tcpdump -r $TMPF -v 2>&1 | grep "$MATCH $TOS2" >> /dev/null
check_result $? 0 "$MATCH $prot $ovr - packet data"
rm $TMPF
[ $ovr == "both" ] && m="-C $((TOS )) -c"
[ $ovr == "diff" ] && m="-C $((TOS2)) -c"
# Match prohibit rule: expect failure
$NSEXE ./cmsg_sender $IPVER -p $p $m $((TOS)) -s $TGT 1234
check_result $? 1 "$MATCH $prot $ovr - rejection"
# Match prohibit rule: IPv4 masks ECN: expect failure
if [[ "$IPVER" == "-4" ]]; then
$NSEXE ./cmsg_sender $IPVER -p $p $m "$((TOS | ECN))" -s $TGT 1234
check_result $? 1 "$MATCH $prot $ovr - rejection (ECN)"
fi
done
done
}
test_dscp -4 $TGT4 tos
test_dscp -6 $TGT6 class
# IP_TTL + IPV6_HOPLIMIT
test_ttl_hoplimit() {
local -r IPVER=$1
local -r TGT=$2
local -r MATCH=$3
local -r LIM=4
for ovr in setsock cmsg both diff; do
for p in u U i r; do
[ $p == "u" ] && prot=UDP
[ $p == "U" ] && prot=UDP
[ $p == "i" ] && prot=ICMP
[ $p == "r" ] && prot=RAW
[ $ovr == "setsock" ] && m="-L"
[ $ovr == "cmsg" ] && m="-l"
[ $ovr == "both" ] && m="-L $LIM -l"
[ $ovr == "diff" ] && m="-L $((LIM + 1)) -l"
$NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
BG=$!
sleep 0.05
$NSEXE ./cmsg_sender $IPVER -p $p $m $LIM $TGT 1234
check_result $? 0 "$MATCH $prot $ovr - pass"
while [ -d /proc/$BG ]; do
$NSEXE ./cmsg_sender $IPVER -p $p $m $LIM $TGT 1234
done
tcpdump -r $TMPF -v 2>&1 | grep "$MATCH $LIM[^0-9]" >> /dev/null
check_result $? 0 "$MATCH $prot $ovr - packet data"
rm $TMPF
done
done
}
test_ttl_hoplimit -4 $TGT4 ttl
test_ttl_hoplimit -6 $TGT6 hlim
# IPV6 exthdr
for p in u U i r; do
# Very basic "does it crash" test
for h in h d r; do
$NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234
check_result $? 0 "ExtHdr $prot $ovr - pass"
done
done
# Summary
if [ $BAD -ne 0 ]; then
echo "FAIL - $BAD/$TOTAL cases failed"
exit 1
else
echo "OK"
exit 0
fi
|
