4b00d0c513
cmsg_ipv6 test requests tcpdump to capture 4 packets,
and sends until tcpdump quits. Only the first packet
is "real", however, and the rest are basic UDP packets.
So if tcpdump doesn't start in time it will miss
the real packet and only capture the UDP ones.
This makes the test fail on slow machine (no KVM or with
debug enabled) 100% of the time, while it passes in fast
environments.
Repeat the "real" / expected packet.
Fixes: 9657ad09e1fa ("selftests: net: test IPV6_TCLASS")
Fixes: 05ae83d5a4a2 ("selftests: net: test IPV6_HOPLIMIT")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
155 lines
3.3 KiB
Bash
Executable File
155 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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source lib.sh
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IP6=2001:db8:1::1/64
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TGT6=2001:db8:1::2
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TMPF=$(mktemp --suffix ".pcap")
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cleanup()
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{
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rm -f $TMPF
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cleanup_ns $NS
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}
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trap cleanup EXIT
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tcpdump -h | grep immediate-mode >> /dev/null
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if [ $? -ne 0 ]; then
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echo "SKIP - tcpdump with --immediate-mode option required"
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exit $ksft_skip
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fi
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# Namespaces
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setup_ns NS
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NSEXE="ip netns exec $NS"
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$NSEXE sysctl -w net.ipv4.ping_group_range='0 2147483647' > /dev/null
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# Connectivity
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ip -netns $NS link add type dummy
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ip -netns $NS link set dev dummy0 up
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ip -netns $NS addr add $IP6 dev dummy0
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# Test
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BAD=0
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TOTAL=0
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check_result() {
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((TOTAL++))
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if [ $1 -ne $2 ]; then
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echo " Case $3 returned $1, expected $2"
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((BAD++))
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fi
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}
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# IPV6_DONTFRAG
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for ovr in setsock cmsg both diff; do
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for df in 0 1; do
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for p in u i r; do
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[ $p == "u" ] && prot=UDP
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[ $p == "i" ] && prot=ICMP
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[ $p == "r" ] && prot=RAW
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[ $ovr == "setsock" ] && m="-F $df"
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[ $ovr == "cmsg" ] && m="-f $df"
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[ $ovr == "both" ] && m="-F $df -f $df"
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[ $ovr == "diff" ] && m="-F $((1 - df)) -f $df"
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$NSEXE ./cmsg_sender -s -S 2000 -6 -p $p $m $TGT6 1234
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check_result $? $df "DONTFRAG $prot $ovr"
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done
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done
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done
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# IPV6_TCLASS
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TOS=0x10
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TOS2=0x20
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ip -6 -netns $NS rule add tos $TOS lookup 300
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ip -6 -netns $NS route add table 300 prohibit any
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for ovr in setsock cmsg both diff; do
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for p in u i r; do
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[ $p == "u" ] && prot=UDP
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[ $p == "i" ] && prot=ICMP
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[ $p == "r" ] && prot=RAW
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[ $ovr == "setsock" ] && m="-C"
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[ $ovr == "cmsg" ] && m="-c"
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[ $ovr == "both" ] && m="-C $((TOS2)) -c"
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[ $ovr == "diff" ] && m="-C $((TOS )) -c"
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$NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
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BG=$!
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sleep 0.05
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$NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
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check_result $? 0 "TCLASS $prot $ovr - pass"
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while [ -d /proc/$BG ]; do
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$NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
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done
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tcpdump -r $TMPF -v 2>&1 | grep "class $TOS2" >> /dev/null
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check_result $? 0 "TCLASS $prot $ovr - packet data"
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rm $TMPF
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[ $ovr == "both" ] && m="-C $((TOS )) -c"
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[ $ovr == "diff" ] && m="-C $((TOS2)) -c"
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$NSEXE ./cmsg_sender -6 -p $p $m $((TOS)) -s $TGT6 1234
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check_result $? 1 "TCLASS $prot $ovr - rejection"
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done
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done
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# IPV6_HOPLIMIT
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LIM=4
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for ovr in setsock cmsg both diff; do
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for p in u i r; do
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[ $p == "u" ] && prot=UDP
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[ $p == "i" ] && prot=ICMP
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[ $p == "r" ] && prot=RAW
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[ $ovr == "setsock" ] && m="-L"
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[ $ovr == "cmsg" ] && m="-l"
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[ $ovr == "both" ] && m="-L $LIM -l"
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[ $ovr == "diff" ] && m="-L $((LIM + 1)) -l"
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$NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
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BG=$!
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sleep 0.05
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$NSEXE ./cmsg_sender -6 -p $p $m $LIM $TGT6 1234
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check_result $? 0 "HOPLIMIT $prot $ovr - pass"
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while [ -d /proc/$BG ]; do
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$NSEXE ./cmsg_sender -6 -p $p $m $LIM $TGT6 1234
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done
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tcpdump -r $TMPF -v 2>&1 | grep "hlim $LIM[^0-9]" >> /dev/null
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check_result $? 0 "HOPLIMIT $prot $ovr - packet data"
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rm $TMPF
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done
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done
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# IPV6 exthdr
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for p in u i r; do
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# Very basic "does it crash" test
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for h in h d r; do
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$NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234
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check_result $? 0 "ExtHdr $prot $ovr - pass"
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done
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done
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# Summary
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if [ $BAD -ne 0 ]; then
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echo "FAIL - $BAD/$TOTAL cases failed"
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exit 1
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else
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echo "OK"
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exit 0
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fi
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