tools/testing/selftests/bpf/test_flow_dissector.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Load BPF flow dissector and verify it correctly dissects traffic
   5 export TESTNAME=test_flow_dissector
   6 unmount=0
   7
   8 # Kselftest framework requirement - SKIP code is 4.
   9 ksft_skip=4
  10
  11 msg="skip all tests:"
  12 if [ $UID != 0 ]; then
  13         echo $msg please run this as root >&2
  14         exit $ksft_skip
  15 fi
  16
  17 # This test needs to be run in a network namespace with in_netns.sh. Check if
  18 # this is the case and run it with in_netns.sh if it is being run in the root
  19 # namespace.
  20 if [[ -z $(ip netns identify $$) ]]; then
  21         ../net/in_netns.sh "$0" "$@"
  22         exit $?
  23 fi
  24
  25 # Determine selftest success via shell exit code
  26 exit_handler()
  27 {
  28         if (( $? == 0 )); then
  29                 echo "selftests: $TESTNAME [PASS]";
  30         else
  31                 echo "selftests: $TESTNAME [FAILED]";
  32         fi
  33
  34         set +e
  35
  36         # Cleanup
  37         tc filter del dev lo ingress pref 1337 2> /dev/null
  38         tc qdisc del dev lo ingress 2> /dev/null
  39         ./flow_dissector_load -d 2> /dev/null
  40         if [ $unmount -ne 0 ]; then
  41                 umount bpffs 2> /dev/null
  42         fi
  43 }
  44
  45 # Exit script immediately (well catched by trap handler) if any
  46 # program/thing exits with a non-zero status.
  47 set -e
  48
  49 # (Use 'trap -l' to list meaning of numbers)
  50 trap exit_handler 0 2 3 6 9
  51
  52 # Mount BPF file system
  53 if /bin/mount | grep /sys/fs/bpf > /dev/null; then
  54         echo "bpffs already mounted"
  55 else
  56         echo "bpffs not mounted. Mounting..."
  57         unmount=1
  58         /bin/mount bpffs /sys/fs/bpf -t bpf
  59 fi
  60
  61 # Attach BPF program
  62 ./flow_dissector_load -p bpf_flow.o -s flow_dissector
  63
  64 # Setup
  65 tc qdisc add dev lo ingress
  66 echo 0 > /proc/sys/net/ipv4/conf/default/rp_filter
  67 echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter
  68 echo 0 > /proc/sys/net/ipv4/conf/lo/rp_filter
  69
  70 echo "Testing IPv4..."
  71 # Drops all IP/UDP packets coming from port 9
  72 tc filter add dev lo parent ffff: protocol ip pref 1337 flower ip_proto \
  73         udp src_port 9 action drop
  74
  75 # Send 10 IPv4/UDP packets from port 8. Filter should not drop any.
  76 ./test_flow_dissector -i 4 -f 8
  77 # Send 10 IPv4/UDP packets from port 9. Filter should drop all.
  78 ./test_flow_dissector -i 4 -f 9 -F
  79 # Send 10 IPv4/UDP packets from port 10. Filter should not drop any.
  80 ./test_flow_dissector -i 4 -f 10
  81
  82 echo "Testing IPIP..."
  83 # Send 10 IPv4/IPv4/UDP packets from port 8. Filter should not drop any.
  84 ./with_addr.sh ./with_tunnels.sh ./test_flow_dissector -o 4 -e bare -i 4 \
  85         -D 192.168.0.1 -S 1.1.1.1 -f 8
  86 # Send 10 IPv4/IPv4/UDP packets from port 9. Filter should drop all.
  87 ./with_addr.sh ./with_tunnels.sh ./test_flow_dissector -o 4 -e bare -i 4 \
  88         -D 192.168.0.1 -S 1.1.1.1 -f 9 -F
  89 # Send 10 IPv4/IPv4/UDP packets from port 10. Filter should not drop any.
  90 ./with_addr.sh ./with_tunnels.sh ./test_flow_dissector -o 4 -e bare -i 4 \
  91         -D 192.168.0.1 -S 1.1.1.1 -f 10
  92
  93 echo "Testing IPv4 + GRE..."
  94 # Send 10 IPv4/GRE/IPv4/UDP packets from port 8. Filter should not drop any.
  95 ./with_addr.sh ./with_tunnels.sh ./test_flow_dissector -o 4 -e gre -i 4 \
  96         -D 192.168.0.1 -S 1.1.1.1 -f 8
  97 # Send 10 IPv4/GRE/IPv4/UDP packets from port 9. Filter should drop all.
  98 ./with_addr.sh ./with_tunnels.sh ./test_flow_dissector -o 4 -e gre -i 4 \
  99         -D 192.168.0.1 -S 1.1.1.1 -f 9 -F
 100 # Send 10 IPv4/GRE/IPv4/UDP packets from port 10. Filter should not drop any.
 101 ./with_addr.sh ./with_tunnels.sh ./test_flow_dissector -o 4 -e gre -i 4 \
 102         -D 192.168.0.1 -S 1.1.1.1 -f 10
 103
 104 tc filter del dev lo ingress pref 1337
 105
 106 echo "Testing IPv6..."
 107 # Drops all IPv6/UDP packets coming from port 9
 108 tc filter add dev lo parent ffff: protocol ipv6 pref 1337 flower ip_proto \
 109         udp src_port 9 action drop
 110
 111 # Send 10 IPv6/UDP packets from port 8. Filter should not drop any.
 112 ./test_flow_dissector -i 6 -f 8
 113 # Send 10 IPv6/UDP packets from port 9. Filter should drop all.
 114 ./test_flow_dissector -i 6 -f 9 -F
 115 # Send 10 IPv6/UDP packets from port 10. Filter should not drop any.
 116 ./test_flow_dissector -i 6 -f 10
 117
 118 exit 0