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|
#!/usr/bin/env bash
#
# Set up a virtual environment in a network namespace, and run arping
# in that controlled environment.
#
# This needs to run as root, since it creates network namespaces and
# virtual ethernet devices.
#
set -e
set -o pipefail
setup() {
ip netns del arping_test0 2>/dev/null || true
ip netns del arping_test1 2>/dev/null || true
ip netns add arping_test0
ip netns add arping_test1
ip link add veth0 type veth peer name veth1
ip link set veth0 netns arping_test0
ip link set veth1 netns arping_test1
ip netns exec arping_test0 ip l set up veth0
ip netns exec arping_test1 ip l set up veth1
ip netns exec arping_test0 ip l set dev veth0 address 00:01:02:33:44:00
ip netns exec arping_test1 ip l set dev veth1 address 00:01:02:33:44:01
ip netns exec arping_test0 ip a a 192.0.2.100/24 dev veth0
ip netns exec arping_test1 ip a a 192.0.2.101/24 dev veth1
}
#
# Run tests.
# run_test [ -t ] [ -i ] <test name> <arping options…>
#
# -t Skip capturing packets
# -i Set net.ipv4.icmp_echo_ignore_broadcasts=0
run_test() {
setup
DO_CAPTURE=yes
if [[ "$1" = "-t" ]]; then
DO_CAPTURE=no
shift
fi
if [[ "$1" = "-i" ]]; then
ip netns exec arping_test1 sysctl -w net.ipv4.icmp_echo_ignore_broadcasts=0
shift
fi
NAME="$1"
shift
ECODE="$1"
shift
echo "-----------------------------"
echo " Test: ${NAME?}"
echo "-----------------------------"
if [[ "${DO_CAPTURE?}" = "yes" ]]; then
CAP="$(mktemp)"
# TODO: in the future also capture icmp. But we need regex matching for that.
ip netns exec arping_test1 \
tcpdump \
-s0 \
-nlpi veth1 \
--immediate-mode \
-w "${CAP?}" \
arp \
&
PID=$!
# wait for tcpdump to wake up.
sleep "${SLEEP?}"
fi
# Run arping.
set +e
# TODO: test that errors go to stderr.
OUT="$(ip netns exec arping_test0 ./src/arping -W0.05 "$@" 2>&1)"
E=$?
set -e
if [[ ! $ECODE = $E ]]; then
echo "FAIL: wrong exit code ${E?}, want ${ECODE?}"
echo "Output:"
echo "---"
echo "${OUT?}"
exit 1
fi
if ! echo "${OUT?}" | tests/regmatch.py "tests/${NAME?}.out"; then
echo "FAIL: wrong output:"
echo "----"
echo "${OUT?}"
#echo "${OUT?}" > a
echo "---- Should match -----"
cat "tests/${NAME?}.out"
exit 1
fi
if [[ "${DO_CAPTURE?}" = "yes" ]]; then
# Wait for tcpdump to see the packets.
sleep "${SLEEP?}"
kill -INT "${PID?}"
wait "${PID?}" || true
TXT="$(mktemp)"
chown root:root "${CAP?}"
tcpdump -txnlpr "${CAP?}" > "${TXT?}"
diff -Nu "tests/${NAME?}.cap" "${TXT?}" || (echo "FAIL ${TXT?}"; exit 1)
rm "${CAP?}"
fi
cleanup
}
cleanup() {
ip netns del arping_test0 || true
ip netns del arping_test1 || true
}
run_tests() {
# Usage stuff.
run_test -t "no_args" 1
run_test -t "h" 0 -h
run_test -t "help" 0 --help
# Simple IP examples.
run_test "simple" 0 -c 1 192.0.2.101
run_test "simple_verbose" 0 -v -c 1 192.0.2.101
run_test "no_reply" 1 -c 1 192.0.2.1
# Simple MAC examples.
run_test -t "simplemac_timeout" 1 -c 1 -i veth0 00:01:02:33:44:01
run_test -t "simplemac_target" 0 -c 1 -T 192.0.2.101 00:01:02:33:44:01
run_test -t -i "simplemac_noignore" 0 -c 1 -i veth0 00:01:02:33:44:01
# TODO: ping mac address.
# -0
run_test "simple0" 0 -c 1 -0 192.0.2.101
# TODO: -a
# TODO: -A
# TODO: -b
# TODO: -B
# -c
run_test "simple3" 0 -c 3 192.0.2.101
run_test "bad_count" 1 -c -1 192.0.2.101
# TODO: -C
# TODO: -d
# TODO: -D
# TODO: -e
# TODO: -F
# TODO: -g
# TODO: -i
# TODO: -m
# TODO: -p
# -P
run_test "reply" 0 -c 1 -P 192.0.2.101
run_test "unsolicited_reply" 0 -c 1 -P -U 192.0.2.101
# TODO: -q
# TODO: -Q
# TODO: -r
# TODO: -R
# TODO: -s
# TODO: -S
# TODO: -t
# TODO: -T
# TODO: -u
run_test "unsolicited" 0 -c 1 -U 192.0.2.101
# TODO: -v
# TODO: -V
# TODO: -w
# TODO: -W
# TODO: -z
# TODO: -Z
}
main() {
cd "$(dirname $0)/.."
SLEEP="${1:-0.1}"
cleanup
run_tests
echo "All OK"
}
main "$@"
|
