1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4. "$(dirname "${0}")/mptcp_lib.sh"
5
6ret=0
7sin=""
8sout=""
9cin=""
10cout=""
11ksft_skip=4
12timeout_poll=30
13timeout_test=$((timeout_poll * 2 + 1))
14mptcp_connect=""
15iptables="iptables"
16ip6tables="ip6tables"
17
18sec=$(date +%s)
19rndh=$(printf %x $sec)-$(mktemp -u XXXXXX)
20ns1="ns1-$rndh"
21ns2="ns2-$rndh"
22ns_sbox="ns_sbox-$rndh"
23
24add_mark_rules()
25{
26	local ns=$1
27	local m=$2
28
29	local t
30	for t in ${iptables} ${ip6tables}; do
31		# just to debug: check we have multiple subflows connection requests
32		ip netns exec $ns $t -A OUTPUT -p tcp --syn -m mark --mark $m -j ACCEPT
33
34		# RST packets might be handled by a internal dummy socket
35		ip netns exec $ns $t -A OUTPUT -p tcp --tcp-flags RST RST -m mark --mark 0 -j ACCEPT
36
37		ip netns exec $ns $t -A OUTPUT -p tcp -m mark --mark $m -j ACCEPT
38		ip netns exec $ns $t -A OUTPUT -p tcp -m mark --mark 0 -j DROP
39	done
40}
41
42init()
43{
44	local netns
45	for netns in "$ns1" "$ns2" "$ns_sbox";do
46		ip netns add $netns || exit $ksft_skip
47		ip -net $netns link set lo up
48		ip netns exec $netns sysctl -q net.mptcp.enabled=1
49		ip netns exec $netns sysctl -q net.ipv4.conf.all.rp_filter=0
50		ip netns exec $netns sysctl -q net.ipv4.conf.default.rp_filter=0
51	done
52
53	local i
54	for i in `seq 1 4`; do
55		ip link add ns1eth$i netns "$ns1" type veth peer name ns2eth$i netns "$ns2"
56		ip -net "$ns1" addr add 10.0.$i.1/24 dev ns1eth$i
57		ip -net "$ns1" addr add dead:beef:$i::1/64 dev ns1eth$i nodad
58		ip -net "$ns1" link set ns1eth$i up
59
60		ip -net "$ns2" addr add 10.0.$i.2/24 dev ns2eth$i
61		ip -net "$ns2" addr add dead:beef:$i::2/64 dev ns2eth$i nodad
62		ip -net "$ns2" link set ns2eth$i up
63
64		# let $ns2 reach any $ns1 address from any interface
65		ip -net "$ns2" route add default via 10.0.$i.1 dev ns2eth$i metric 10$i
66
67		ip netns exec $ns1 ./pm_nl_ctl add 10.0.$i.1 flags signal
68		ip netns exec $ns1 ./pm_nl_ctl add dead:beef:$i::1 flags signal
69
70		ip netns exec $ns2 ./pm_nl_ctl add 10.0.$i.2 flags signal
71		ip netns exec $ns2 ./pm_nl_ctl add dead:beef:$i::2 flags signal
72	done
73
74	ip netns exec $ns1 ./pm_nl_ctl limits 8 8
75	ip netns exec $ns2 ./pm_nl_ctl limits 8 8
76
77	add_mark_rules $ns1 1
78	add_mark_rules $ns2 2
79}
80
81cleanup()
82{
83	local netns
84	for netns in "$ns1" "$ns2" "$ns_sbox"; do
85		ip netns del $netns
86	done
87	rm -f "$cin" "$cout"
88	rm -f "$sin" "$sout"
89}
90
91mptcp_lib_check_mptcp
92mptcp_lib_check_kallsyms
93
94ip -Version > /dev/null 2>&1
95if [ $? -ne 0 ];then
96	echo "SKIP: Could not run test without ip tool"
97	exit $ksft_skip
98fi
99
100# Use the legacy version if available to support old kernel versions
101if iptables-legacy -V &> /dev/null; then
102	iptables="iptables-legacy"
103	ip6tables="ip6tables-legacy"
104elif ! iptables -V &> /dev/null; then
105	echo "SKIP: Could not run all tests without iptables tool"
106	exit $ksft_skip
107elif ! ip6tables -V &> /dev/null; then
108	echo "SKIP: Could not run all tests without ip6tables tool"
109	exit $ksft_skip
110fi
111
112check_mark()
113{
114	local ns=$1
115	local af=$2
116
117	local tables=${iptables}
118
119	if [ $af -eq 6 ];then
120		tables=${ip6tables}
121	fi
122
123	local counters values
124	counters=$(ip netns exec $ns $tables -v -L OUTPUT | grep DROP)
125	values=${counters%DROP*}
126
127	local v
128	for v in $values; do
129		if [ $v -ne 0 ]; then
130			echo "FAIL: got $tables $values in ns $ns , not 0 - not all expected packets marked" 1>&2
131			ret=1
132			return 1
133		fi
134	done
135
136	return 0
137}
138
139print_file_err()
140{
141	ls -l "$1" 1>&2
142	echo "Trailing bytes are: "
143	tail -c 27 "$1"
144}
145
146check_transfer()
147{
148	local in=$1
149	local out=$2
150	local what=$3
151
152	cmp "$in" "$out" > /dev/null 2>&1
153	if [ $? -ne 0 ] ;then
154		echo "[ FAIL ] $what does not match (in, out):"
155		print_file_err "$in"
156		print_file_err "$out"
157		ret=1
158
159		return 1
160	fi
161
162	return 0
163}
164
165do_transfer()
166{
167	local listener_ns="$1"
168	local connector_ns="$2"
169	local cl_proto="$3"
170	local srv_proto="$4"
171	local connect_addr="$5"
172
173	local port=12001
174
175	:> "$cout"
176	:> "$sout"
177
178	local mptcp_connect="./mptcp_connect -r 20"
179
180	local local_addr ip
181	if mptcp_lib_is_v6 "${connect_addr}"; then
182		local_addr="::"
183		ip=ipv6
184	else
185		local_addr="0.0.0.0"
186		ip=ipv4
187	fi
188
189	cmsg="TIMESTAMPNS"
190	if mptcp_lib_kallsyms_has "mptcp_ioctl$"; then
191		cmsg+=",TCPINQ"
192	fi
193
194	timeout ${timeout_test} \
195		ip netns exec ${listener_ns} \
196			$mptcp_connect -t ${timeout_poll} -l -M 1 -p $port -s ${srv_proto} -c "${cmsg}" \
197				${local_addr} < "$sin" > "$sout" &
198	local spid=$!
199
200	sleep 1
201
202	timeout ${timeout_test} \
203		ip netns exec ${connector_ns} \
204			$mptcp_connect -t ${timeout_poll} -M 2 -p $port -s ${cl_proto} -c "${cmsg}" \
205				$connect_addr < "$cin" > "$cout" &
206
207	local cpid=$!
208
209	wait $cpid
210	local retc=$?
211	wait $spid
212	local rets=$?
213
214	if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
215		echo " client exit code $retc, server $rets" 1>&2
216		echo -e "\nnetns ${listener_ns} socket stat for ${port}:" 1>&2
217		ip netns exec ${listener_ns} ss -Menita 1>&2 -o "sport = :$port"
218
219		echo -e "\nnetns ${connector_ns} socket stat for ${port}:" 1>&2
220		ip netns exec ${connector_ns} ss -Menita 1>&2 -o "dport = :$port"
221
222		mptcp_lib_result_fail "transfer ${ip}"
223
224		ret=1
225		return 1
226	fi
227
228	if [ $local_addr = "::" ];then
229		check_mark $listener_ns 6 || retc=1
230		check_mark $connector_ns 6 || retc=1
231	else
232		check_mark $listener_ns 4 || retc=1
233		check_mark $connector_ns 4 || retc=1
234	fi
235
236	check_transfer $cin $sout "file received by server"
237	rets=$?
238
239	mptcp_lib_result_code "${retc}" "mark ${ip}"
240	mptcp_lib_result_code "${rets}" "transfer ${ip}"
241
242	if [ $retc -eq 0 ] && [ $rets -eq 0 ];then
243		return 0
244	fi
245
246	return 1
247}
248
249make_file()
250{
251	local name=$1
252	local who=$2
253	local size=$3
254
255	dd if=/dev/urandom of="$name" bs=1024 count=$size 2> /dev/null
256	echo -e "\nMPTCP_TEST_FILE_END_MARKER" >> "$name"
257
258	echo "Created $name (size $size KB) containing data sent by $who"
259}
260
261do_mptcp_sockopt_tests()
262{
263	local lret=0
264
265	if ! mptcp_lib_kallsyms_has "mptcp_diag_fill_info$"; then
266		echo "INFO: MPTCP sockopt not supported: SKIP"
267		mptcp_lib_result_skip "sockopt"
268		return
269	fi
270
271	ip netns exec "$ns_sbox" ./mptcp_sockopt
272	lret=$?
273
274	if [ $lret -ne 0 ]; then
275		echo "FAIL: SOL_MPTCP getsockopt" 1>&2
276		mptcp_lib_result_fail "sockopt v4"
277		ret=$lret
278		return
279	fi
280	mptcp_lib_result_pass "sockopt v4"
281
282	ip netns exec "$ns_sbox" ./mptcp_sockopt -6
283	lret=$?
284
285	if [ $lret -ne 0 ]; then
286		echo "FAIL: SOL_MPTCP getsockopt (ipv6)" 1>&2
287		mptcp_lib_result_fail "sockopt v6"
288		ret=$lret
289		return
290	fi
291	mptcp_lib_result_pass "sockopt v6"
292}
293
294run_tests()
295{
296	local listener_ns="$1"
297	local connector_ns="$2"
298	local connect_addr="$3"
299	local lret=0
300
301	do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr}
302
303	lret=$?
304
305	if [ $lret -ne 0 ]; then
306		ret=$lret
307		return
308	fi
309}
310
311do_tcpinq_test()
312{
313	ip netns exec "$ns_sbox" ./mptcp_inq "$@"
314	local lret=$?
315	if [ $lret -ne 0 ];then
316		ret=$lret
317		echo "FAIL: mptcp_inq $@" 1>&2
318		mptcp_lib_result_fail "TCP_INQ: $*"
319		return $lret
320	fi
321
322	echo "PASS: TCP_INQ cmsg/ioctl $@"
323	mptcp_lib_result_pass "TCP_INQ: $*"
324	return $lret
325}
326
327do_tcpinq_tests()
328{
329	local lret=0
330
331	if ! mptcp_lib_kallsyms_has "mptcp_ioctl$"; then
332		echo "INFO: TCP_INQ not supported: SKIP"
333		mptcp_lib_result_skip "TCP_INQ"
334		return
335	fi
336
337	local args
338	for args in "-t tcp" "-r tcp"; do
339		do_tcpinq_test $args
340		lret=$?
341		if [ $lret -ne 0 ] ; then
342			return $lret
343		fi
344		do_tcpinq_test -6 $args
345		lret=$?
346		if [ $lret -ne 0 ] ; then
347			return $lret
348		fi
349	done
350
351	do_tcpinq_test -r tcp -t tcp
352
353	return $?
354}
355
356sin=$(mktemp)
357sout=$(mktemp)
358cin=$(mktemp)
359cout=$(mktemp)
360init
361make_file "$cin" "client" 1
362make_file "$sin" "server" 1
363trap cleanup EXIT
364
365run_tests $ns1 $ns2 10.0.1.1
366run_tests $ns1 $ns2 dead:beef:1::1
367
368if [ $ret -eq 0 ];then
369	echo "PASS: all packets had packet mark set"
370fi
371
372do_mptcp_sockopt_tests
373if [ $ret -eq 0 ];then
374	echo "PASS: SOL_MPTCP getsockopt has expected information"
375fi
376
377do_tcpinq_tests
378
379mptcp_lib_result_print_all_tap
380exit $ret
381