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
165# $1: IP address
166is_v6()
167{
168	[ -z "${1##*:*}" ]
169}
170
171do_transfer()
172{
173	local listener_ns="$1"
174	local connector_ns="$2"
175	local cl_proto="$3"
176	local srv_proto="$4"
177	local connect_addr="$5"
178
179	local port=12001
180
181	:> "$cout"
182	:> "$sout"
183
184	local mptcp_connect="./mptcp_connect -r 20"
185
186	local local_addr
187	if is_v6 "${connect_addr}"; then
188		local_addr="::"
189	else
190		local_addr="0.0.0.0"
191	fi
192
193	cmsg="TIMESTAMPNS"
194	if mptcp_lib_kallsyms_has "mptcp_ioctl$"; then
195		cmsg+=",TCPINQ"
196	fi
197
198	timeout ${timeout_test} \
199		ip netns exec ${listener_ns} \
200			$mptcp_connect -t ${timeout_poll} -l -M 1 -p $port -s ${srv_proto} -c "${cmsg}" \
201				${local_addr} < "$sin" > "$sout" &
202	local spid=$!
203
204	sleep 1
205
206	timeout ${timeout_test} \
207		ip netns exec ${connector_ns} \
208			$mptcp_connect -t ${timeout_poll} -M 2 -p $port -s ${cl_proto} -c "${cmsg}" \
209				$connect_addr < "$cin" > "$cout" &
210
211	local cpid=$!
212
213	wait $cpid
214	local retc=$?
215	wait $spid
216	local rets=$?
217
218	if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
219		echo " client exit code $retc, server $rets" 1>&2
220		echo -e "\nnetns ${listener_ns} socket stat for ${port}:" 1>&2
221		ip netns exec ${listener_ns} ss -Menita 1>&2 -o "sport = :$port"
222
223		echo -e "\nnetns ${connector_ns} socket stat for ${port}:" 1>&2
224		ip netns exec ${connector_ns} ss -Menita 1>&2 -o "dport = :$port"
225
226		ret=1
227		return 1
228	fi
229
230	if [ $local_addr = "::" ];then
231		check_mark $listener_ns 6 || retc=1
232		check_mark $connector_ns 6 || retc=1
233	else
234		check_mark $listener_ns 4 || retc=1
235		check_mark $connector_ns 4 || retc=1
236	fi
237
238	check_transfer $cin $sout "file received by server"
239
240	rets=$?
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		return
268	fi
269
270	ip netns exec "$ns_sbox" ./mptcp_sockopt
271	lret=$?
272
273	if [ $lret -ne 0 ]; then
274		echo "FAIL: SOL_MPTCP getsockopt" 1>&2
275		ret=$lret
276		return
277	fi
278
279	ip netns exec "$ns_sbox" ./mptcp_sockopt -6
280	lret=$?
281
282	if [ $lret -ne 0 ]; then
283		echo "FAIL: SOL_MPTCP getsockopt (ipv6)" 1>&2
284		ret=$lret
285		return
286	fi
287}
288
289run_tests()
290{
291	local listener_ns="$1"
292	local connector_ns="$2"
293	local connect_addr="$3"
294	local lret=0
295
296	do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP ${connect_addr}
297
298	lret=$?
299
300	if [ $lret -ne 0 ]; then
301		ret=$lret
302		return
303	fi
304}
305
306do_tcpinq_test()
307{
308	ip netns exec "$ns_sbox" ./mptcp_inq "$@"
309	local lret=$?
310	if [ $lret -ne 0 ];then
311		ret=$lret
312		echo "FAIL: mptcp_inq $@" 1>&2
313		return $lret
314	fi
315
316	echo "PASS: TCP_INQ cmsg/ioctl $@"
317	return $lret
318}
319
320do_tcpinq_tests()
321{
322	local lret=0
323
324	if ! mptcp_lib_kallsyms_has "mptcp_ioctl$"; then
325		echo "INFO: TCP_INQ not supported: SKIP"
326		return
327	fi
328
329	local args
330	for args in "-t tcp" "-r tcp"; do
331		do_tcpinq_test $args
332		lret=$?
333		if [ $lret -ne 0 ] ; then
334			return $lret
335		fi
336		do_tcpinq_test -6 $args
337		lret=$?
338		if [ $lret -ne 0 ] ; then
339			return $lret
340		fi
341	done
342
343	do_tcpinq_test -r tcp -t tcp
344
345	return $?
346}
347
348sin=$(mktemp)
349sout=$(mktemp)
350cin=$(mktemp)
351cout=$(mktemp)
352init
353make_file "$cin" "client" 1
354make_file "$sin" "server" 1
355trap cleanup EXIT
356
357run_tests $ns1 $ns2 10.0.1.1
358run_tests $ns1 $ns2 dead:beef:1::1
359
360if [ $ret -eq 0 ];then
361	echo "PASS: all packets had packet mark set"
362fi
363
364do_mptcp_sockopt_tests
365if [ $ret -eq 0 ];then
366	echo "PASS: SOL_MPTCP getsockopt has expected information"
367fi
368
369do_tcpinq_tests
370exit $ret
371