selftests/net/cmsg_ipv6.sh

0001 #!/bin/bash
0002 # SPDX-License-Identifier: GPL-2.0
0003
0004 ksft_skip=4
0005
0006 NS=ns
0007 IP6=2001:db8:1::1/64
0008 TGT6=2001:db8:1::2
0009 TMPF=`mktemp`
0010
0011 cleanup()
0012 {
0013     rm -f $TMPF
0014     ip netns del $NS
0015 }
0016
0017 trap cleanup EXIT
0018
0019 NSEXE="ip netns exec $NS"
0020
0021 tcpdump -h | grep immediate-mode >> /dev/null
0022 if [ $? -ne 0 ]; then
0023     echo "SKIP - tcpdump with --immediate-mode option required"
0024     exit $ksft_skip
0025 fi
0026
0027 # Namespaces
0028 ip netns add $NS
0029
0030 $NSEXE sysctl -w net.ipv4.ping_group_range='0 2147483647' > /dev/null
0031
0032 # Connectivity
0033 ip -netns $NS link add type dummy
0034 ip -netns $NS link set dev dummy0 up
0035 ip -netns $NS addr add $IP6 dev dummy0
0036
0037 # Test
0038 BAD=0
0039 TOTAL=0
0040
0041 check_result() {
0042     ((TOTAL++))
0043     if [ $1 -ne $2 ]; then
0044         echo "  Case $3 returned $1, expected $2"
0045         ((BAD++))
0046     fi
0047 }
0048
0049 # IPV6_DONTFRAG
0050 for ovr in setsock cmsg both diff; do
0051     for df in 0 1; do
0052         for p in u i r; do
0053             [ $p == "u" ] && prot=UDP
0054             [ $p == "i" ] && prot=ICMP
0055             [ $p == "r" ] && prot=RAW
0056
0057             [ $ovr == "setsock" ] && m="-F $df"
0058             [ $ovr == "cmsg" ]    && m="-f $df"
0059             [ $ovr == "both" ]    && m="-F $df -f $df"
0060             [ $ovr == "diff" ]    && m="-F $((1 - df)) -f $df"
0061
0062             $NSEXE ./cmsg_sender -s -S 2000 -6 -p $p $m $TGT6 1234
0063             check_result $? $df "DONTFRAG $prot $ovr"
0064         done
0065     done
0066 done
0067
0068 # IPV6_TCLASS
0069 TOS=0x10
0070 TOS2=0x20
0071
0072 ip -6 -netns $NS rule add tos $TOS lookup 300
0073 ip -6 -netns $NS route add table 300 prohibit any
0074
0075 for ovr in setsock cmsg both diff; do
0076     for p in u i r; do
0077         [ $p == "u" ] && prot=UDP
0078         [ $p == "i" ] && prot=ICMP
0079         [ $p == "r" ] && prot=RAW
0080
0081         [ $ovr == "setsock" ] && m="-C"
0082         [ $ovr == "cmsg" ]    && m="-c"
0083         [ $ovr == "both" ]    && m="-C $((TOS2)) -c"
0084         [ $ovr == "diff" ]    && m="-C $((TOS )) -c"
0085
0086         $NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
0087         BG=$!
0088         sleep 0.05
0089
0090         $NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
0091         check_result $? 0 "TCLASS $prot $ovr - pass"
0092
0093         while [ -d /proc/$BG ]; do
0094             $NSEXE ./cmsg_sender -6 -p u $TGT6 1234
0095         done
0096
0097         tcpdump -r $TMPF -v 2>&1 | grep "class $TOS2" >> /dev/null
0098         check_result $? 0 "TCLASS $prot $ovr - packet data"
0099         rm $TMPF
0100
0101         [ $ovr == "both" ]    && m="-C $((TOS )) -c"
0102         [ $ovr == "diff" ]    && m="-C $((TOS2)) -c"
0103
0104         $NSEXE ./cmsg_sender -6 -p $p $m $((TOS)) -s $TGT6 1234
0105         check_result $? 1 "TCLASS $prot $ovr - rejection"
0106     done
0107 done
0108
0109 # IPV6_HOPLIMIT
0110 LIM=4
0111
0112 for ovr in setsock cmsg both diff; do
0113     for p in u i r; do
0114         [ $p == "u" ] && prot=UDP
0115         [ $p == "i" ] && prot=ICMP
0116         [ $p == "r" ] && prot=RAW
0117
0118         [ $ovr == "setsock" ] && m="-L"
0119         [ $ovr == "cmsg" ]    && m="-l"
0120         [ $ovr == "both" ]    && m="-L $LIM -l"
0121         [ $ovr == "diff" ]    && m="-L $((LIM + 1)) -l"
0122
0123         $NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
0124         BG=$!
0125         sleep 0.05
0126
0127         $NSEXE ./cmsg_sender -6 -p $p $m $LIM $TGT6 1234
0128         check_result $? 0 "HOPLIMIT $prot $ovr - pass"
0129
0130         while [ -d /proc/$BG ]; do
0131             $NSEXE ./cmsg_sender -6 -p u $TGT6 1234
0132         done
0133
0134         tcpdump -r $TMPF -v 2>&1 | grep "hlim $LIM[^0-9]" >> /dev/null
0135         check_result $? 0 "HOPLIMIT $prot $ovr - packet data"
0136         rm $TMPF
0137     done
0138 done
0139
0140 # IPV6 exthdr
0141 for p in u i r; do
0142     # Very basic "does it crash" test
0143     for h in h d r; do
0144         $NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234
0145         check_result $? 0 "ExtHdr $prot $ovr - pass"
0146     done
0147 done
0148
0149 # Summary
0150 if [ $BAD -ne 0 ]; then
0151     echo "FAIL - $BAD/$TOTAL cases failed"
0152     exit 1
0153 else
0154     echo "OK"
0155     exit 0
0156 fi