1#!/bin/bash
2# Connects 6 network namespaces through veths.
3# Each NS may have different IPv6 global scope addresses :
4#   NS1 ---- NS2 ---- NS3 ---- NS4 ---- NS5 ---- NS6
5# fb00::1           fd00::1  fd00::2  fd00::3  fb00::6
6#                   fc42::1           fd00::4
7#
8# All IPv6 packets going to fb00::/16 through NS2 will be encapsulated in a
9# IPv6 header with a Segment Routing Header, with segments :
10# 	fd00::1 -> fd00::2 -> fd00::3 -> fd00::4
11#
12# 3 fd00::/16 IPv6 addresses are binded to seg6local End.BPF actions :
13# - fd00::1 : add a TLV, change the flags and apply a End.X action to fc42::1
14# - fd00::2 : remove the TLV, change the flags, add a tag
15# - fd00::3 : apply an End.T action to fd00::4, through routing table 117
16#
17# fd00::4 is a simple Segment Routing node decapsulating the inner IPv6 packet.
18# Each End.BPF action will validate the operations applied on the SRH by the
19# previous BPF program in the chain, otherwise the packet is dropped.
20#
21# An UDP datagram is sent from fb00::1 to fb00::6. The test succeeds if this
22# datagram can be read on NS6 when binding to fb00::6.
23
24# Kselftest framework requirement - SKIP code is 4.
25ksft_skip=4
26
27msg="skip all tests:"
28if [ $UID != 0 ]; then
29	echo $msg please run this as root >&2
30	exit $ksft_skip
31fi
32
33TMP_FILE="/tmp/selftest_lwt_seg6local.txt"
34
35cleanup()
36{
37	if [ "$?" = "0" ]; then
38		echo "selftests: test_lwt_seg6local [PASS]";
39	else
40		echo "selftests: test_lwt_seg6local [FAILED]";
41	fi
42
43	set +e
44	ip netns del ns1 2> /dev/null
45	ip netns del ns2 2> /dev/null
46	ip netns del ns3 2> /dev/null
47	ip netns del ns4 2> /dev/null
48	ip netns del ns5 2> /dev/null
49	ip netns del ns6 2> /dev/null
50	rm -f $TMP_FILE
51}
52
53set -e
54
55ip netns add ns1
56ip netns add ns2
57ip netns add ns3
58ip netns add ns4
59ip netns add ns5
60ip netns add ns6
61
62trap cleanup 0 2 3 6 9
63
64ip link add veth1 type veth peer name veth2
65ip link add veth3 type veth peer name veth4
66ip link add veth5 type veth peer name veth6
67ip link add veth7 type veth peer name veth8
68ip link add veth9 type veth peer name veth10
69
70ip link set veth1 netns ns1
71ip link set veth2 netns ns2
72ip link set veth3 netns ns2
73ip link set veth4 netns ns3
74ip link set veth5 netns ns3
75ip link set veth6 netns ns4
76ip link set veth7 netns ns4
77ip link set veth8 netns ns5
78ip link set veth9 netns ns5
79ip link set veth10 netns ns6
80
81ip netns exec ns1 ip link set dev veth1 up
82ip netns exec ns2 ip link set dev veth2 up
83ip netns exec ns2 ip link set dev veth3 up
84ip netns exec ns3 ip link set dev veth4 up
85ip netns exec ns3 ip link set dev veth5 up
86ip netns exec ns4 ip link set dev veth6 up
87ip netns exec ns4 ip link set dev veth7 up
88ip netns exec ns5 ip link set dev veth8 up
89ip netns exec ns5 ip link set dev veth9 up
90ip netns exec ns6 ip link set dev veth10 up
91ip netns exec ns6 ip link set dev lo up
92
93# All link scope addresses and routes required between veths
94ip netns exec ns1 ip -6 addr add fb00::12/16 dev veth1 scope link
95ip netns exec ns1 ip -6 route add fb00::21 dev veth1 scope link
96ip netns exec ns2 ip -6 addr add fb00::21/16 dev veth2 scope link
97ip netns exec ns2 ip -6 addr add fb00::34/16 dev veth3 scope link
98ip netns exec ns2 ip -6 route add fb00::43 dev veth3 scope link
99ip netns exec ns3 ip -6 route add fb00::65 dev veth5 scope link
100ip netns exec ns3 ip -6 addr add fb00::43/16 dev veth4 scope link
101ip netns exec ns3 ip -6 addr add fb00::56/16 dev veth5 scope link
102ip netns exec ns4 ip -6 addr add fb00::65/16 dev veth6 scope link
103ip netns exec ns4 ip -6 addr add fb00::78/16 dev veth7 scope link
104ip netns exec ns4 ip -6 route add fb00::87 dev veth7 scope link
105ip netns exec ns5 ip -6 addr add fb00::87/16 dev veth8 scope link
106ip netns exec ns5 ip -6 addr add fb00::910/16 dev veth9 scope link
107ip netns exec ns5 ip -6 route add fb00::109 dev veth9 scope link
108ip netns exec ns5 ip -6 route add fb00::109 table 117 dev veth9 scope link
109ip netns exec ns6 ip -6 addr add fb00::109/16 dev veth10 scope link
110
111ip netns exec ns1 ip -6 addr add fb00::1/16 dev lo
112ip netns exec ns1 ip -6 route add fb00::6 dev veth1 via fb00::21
113
114ip netns exec ns2 ip -6 route add fb00::6 encap bpf in obj test_lwt_seg6local.o sec encap_srh dev veth2
115ip netns exec ns2 ip -6 route add fd00::1 dev veth3 via fb00::43 scope link
116
117ip netns exec ns3 ip -6 route add fc42::1 dev veth5 via fb00::65
118ip netns exec ns3 ip -6 route add fd00::1 encap seg6local action End.BPF endpoint obj test_lwt_seg6local.o sec add_egr_x dev veth4
119
120ip netns exec ns4 ip -6 route add fd00::2 encap seg6local action End.BPF endpoint obj test_lwt_seg6local.o sec pop_egr dev veth6
121ip netns exec ns4 ip -6 addr add fc42::1 dev lo
122ip netns exec ns4 ip -6 route add fd00::3 dev veth7 via fb00::87
123
124ip netns exec ns5 ip -6 route add fd00::4 table 117 dev veth9 via fb00::109
125ip netns exec ns5 ip -6 route add fd00::3 encap seg6local action End.BPF endpoint obj test_lwt_seg6local.o sec inspect_t dev veth8
126
127ip netns exec ns6 ip -6 addr add fb00::6/16 dev lo
128ip netns exec ns6 ip -6 addr add fd00::4/16 dev lo
129
130ip netns exec ns1 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
131ip netns exec ns2 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
132ip netns exec ns3 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
133ip netns exec ns4 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
134ip netns exec ns5 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
135
136ip netns exec ns6 sysctl net.ipv6.conf.all.seg6_enabled=1 > /dev/null
137ip netns exec ns6 sysctl net.ipv6.conf.lo.seg6_enabled=1 > /dev/null
138ip netns exec ns6 sysctl net.ipv6.conf.veth10.seg6_enabled=1 > /dev/null
139
140ip netns exec ns6 nc -l -6 -u -d 7330 > $TMP_FILE &
141ip netns exec ns1 bash -c "echo 'foobar' | nc -w0 -6 -u -p 2121 -s fb00::1 fb00::6 7330"
142sleep 5 # wait enough time to ensure the UDP datagram arrived to the last segment
143kill -TERM $!
144
145if [[ $(< $TMP_FILE) != "foobar" ]]; then
146	exit 1
147fi
148
149exit 0
150