tools/testing/selftests/net/cmsg_ipv6.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 source lib.sh
   5
   6 IP6=2001:db8:1::1/64
   7 TGT6=2001:db8:1::2
   8 TMPF=$(mktemp --suffix ".pcap")
   9
  10 cleanup()
  11 {
  12     rm -f $TMPF
  13     cleanup_ns $NS
  14 }
  15
  16 trap cleanup EXIT
  17
  18 tcpdump -h | grep immediate-mode >> /dev/null
  19 if [ $? -ne 0 ]; then
  20     echo "SKIP - tcpdump with --immediate-mode option required"
  21     exit $ksft_skip
  22 fi
  23
  24 # Namespaces
  25 setup_ns NS
  26 NSEXE="ip netns exec $NS"
  27
  28 $NSEXE sysctl -w net.ipv4.ping_group_range='0 2147483647' > /dev/null
  29
  30 # Connectivity
  31 ip -netns $NS link add type dummy
  32 ip -netns $NS link set dev dummy0 up
  33 ip -netns $NS addr add $IP6 dev dummy0
  34
  35 # Test
  36 BAD=0
  37 TOTAL=0
  38
  39 check_result() {
  40     ((TOTAL++))
  41     if [ $1 -ne $2 ]; then
  42         echo "  Case $3 returned $1, expected $2"
  43         ((BAD++))
  44     fi
  45 }
  46
  47 # IPV6_DONTFRAG
  48 for ovr in setsock cmsg both diff; do
  49     for df in 0 1; do
  50         for p in u i r; do
  51             [ $p == "u" ] && prot=UDP
  52             [ $p == "i" ] && prot=ICMP
  53             [ $p == "r" ] && prot=RAW
  54
  55             [ $ovr == "setsock" ] && m="-F $df"
  56             [ $ovr == "cmsg" ]    && m="-f $df"
  57             [ $ovr == "both" ]    && m="-F $df -f $df"
  58             [ $ovr == "diff" ]    && m="-F $((1 - df)) -f $df"
  59
  60             $NSEXE ./cmsg_sender -s -S 2000 -6 -p $p $m $TGT6 1234
  61             check_result $? $df "DONTFRAG $prot $ovr"
  62         done
  63     done
  64 done
  65
  66 # IPV6_TCLASS
  67 TOS=0x10
  68 TOS2=0x20
  69
  70 ip -6 -netns $NS rule add tos $TOS lookup 300
  71 ip -6 -netns $NS route add table 300 prohibit any
  72
  73 for ovr in setsock cmsg both diff; do
  74     for p in u i r; do
  75         [ $p == "u" ] && prot=UDP
  76         [ $p == "i" ] && prot=ICMP
  77         [ $p == "r" ] && prot=RAW
  78
  79         [ $ovr == "setsock" ] && m="-C"
  80         [ $ovr == "cmsg" ]    && m="-c"
  81         [ $ovr == "both" ]    && m="-C $((TOS2)) -c"
  82         [ $ovr == "diff" ]    && m="-C $((TOS )) -c"
  83
  84         $NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
  85         BG=$!
  86         sleep 0.05
  87
  88         $NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
  89         check_result $? 0 "TCLASS $prot $ovr - pass"
  90
  91         while [ -d /proc/$BG ]; do
  92             $NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
  93         done
  94
  95         tcpdump -r $TMPF -v 2>&1 | grep "class $TOS2" >> /dev/null
  96         check_result $? 0 "TCLASS $prot $ovr - packet data"
  97         rm $TMPF
  98
  99         [ $ovr == "both" ]    && m="-C $((TOS )) -c"
 100         [ $ovr == "diff" ]    && m="-C $((TOS2)) -c"
 101
 102         $NSEXE ./cmsg_sender -6 -p $p $m $((TOS)) -s $TGT6 1234
 103         check_result $? 1 "TCLASS $prot $ovr - rejection"
 104     done
 105 done
 106
 107 # IPV6_HOPLIMIT
 108 LIM=4
 109
 110 for ovr in setsock cmsg both diff; do
 111     for p in u i r; do
 112         [ $p == "u" ] && prot=UDP
 113         [ $p == "i" ] && prot=ICMP
 114         [ $p == "r" ] && prot=RAW
 115
 116         [ $ovr == "setsock" ] && m="-L"
 117         [ $ovr == "cmsg" ]    && m="-l"
 118         [ $ovr == "both" ]    && m="-L $LIM -l"
 119         [ $ovr == "diff" ]    && m="-L $((LIM + 1)) -l"
 120
 121         $NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
 122         BG=$!
 123         sleep 0.05
 124
 125         $NSEXE ./cmsg_sender -6 -p $p $m $LIM $TGT6 1234
 126         check_result $? 0 "HOPLIMIT $prot $ovr - pass"
 127
 128         while [ -d /proc/$BG ]; do
 129             $NSEXE ./cmsg_sender -6 -p $p $m $LIM $TGT6 1234
 130         done
 131
 132         tcpdump -r $TMPF -v 2>&1 | grep "hlim $LIM[^0-9]" >> /dev/null
 133         check_result $? 0 "HOPLIMIT $prot $ovr - packet data"
 134         rm $TMPF
 135     done
 136 done
 137
 138 # IPV6 exthdr
 139 for p in u i r; do
 140     # Very basic "does it crash" test
 141     for h in h d r; do
 142         $NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234
 143         check_result $? 0 "ExtHdr $prot $ovr - pass"
 144     done
 145 done
 146
 147 # Summary
 148 if [ $BAD -ne 0 ]; then
 149     echo "FAIL - $BAD/$TOTAL cases failed"
 150     exit 1
 151 else
 152     echo "OK"
 153     exit 0
 154 fi