1
2function 3_node_snake_topo_clean
3{
4  echo "Clearing all VPP instances.."
5  pkill vpp --signal 9
6  rm /dev/shm/*
7
8  echo "Cleaning topology.."
9  ip netns exec xtr-ns12 ifconfig br12 down
10  ip netns exec xtr-ns23 ifconfig br23 down
11
12  ip netns exec xtr-ns12 brctl delbr br12
13  ip netns exec xtr-ns23 brctl delbr br23
14
15  ip link del dev veth_vpp1 &> /dev/null
16  ip link del dev veth_vpp2 &> /dev/null
17  ip link del dev veth_xtr1_xtr2 &> /dev/null
18  ip link del dev veth_xtr2_xtr1 &> /dev/null
19  ip link del dev veth_xtr2_xtr3 &> /dev/null
20  ip link del dev veth_xtr3_xtr2 &> /dev/null
21
22  ip netns del vppns1 &> /dev/null
23  ip netns del vppns2 &> /dev/null
24  ip netns del xtr-ns12 &> /dev/null
25  ip netns del xtr-ns23 &> /dev/null
26}
27
28function 3_node_snake_topo_setup
29{
30  ip netns add vppns1
31  ip netns add vppns2
32  ip netns add xtr-ns12
33  ip netns add xtr-ns23
34
35  ip link add veth_xtr1_xtr2 type veth peer name xtr1_xtr2
36  ip link add veth_xtr2_xtr1 type veth peer name xtr2_xtr1
37  ip link add veth_xtr2_xtr3 type veth peer name xtr2_xtr3
38  ip link add veth_xtr3_xtr2 type veth peer name xtr3_xtr2
39
40  # enable peer interfaces
41  ip link set dev xtr1_xtr2 up
42  ip link set dev xtr2_xtr1 up
43  ip link set dev xtr2_xtr3 up
44  ip link set dev xtr3_xtr2 up
45
46  ip link set dev veth_xtr1_xtr2 up netns xtr-ns12
47  ip link set dev veth_xtr2_xtr1 up netns xtr-ns12
48  ip link set dev veth_xtr2_xtr3 up netns xtr-ns23
49  ip link set dev veth_xtr3_xtr2 up netns xtr-ns23
50
51  ip netns exec xtr-ns12 brctl addbr br12
52  ip netns exec xtr-ns23 brctl addbr br23
53
54  ip netns exec xtr-ns12 brctl addif br12 veth_xtr1_xtr2
55  ip netns exec xtr-ns12 brctl addif br12 veth_xtr2_xtr1
56  ip netns exec xtr-ns12 ifconfig br12 up
57  ip netns exec xtr-ns23 brctl addif br23 veth_xtr2_xtr3
58  ip netns exec xtr-ns23 brctl addif br23 veth_xtr3_xtr2
59  ip netns exec xtr-ns23 ifconfig br23 up
60
61  # create and configure 1st veth client to vpp pair
62  ip link add veth_vpp1 type veth peer name vpp1
63  ip link set dev vpp1 up
64  ip link set dev veth_vpp1 up netns vppns1
65
66  # create and configure 2nd veth client to vpp pair
67  ip link add veth_vpp2 type veth peer name vpp2
68  ip link set dev vpp2 up
69  ip link set dev veth_vpp2 up netns vppns2
70
71  ip netns exec vppns1 \
72  bash -c "
73    ip link set dev lo up
74    ip addr add 6.0.1.2/24 dev veth_vpp1
75    ip route add 6.0.2.0/24 via 6.0.1.1
76    ip addr add 6:0:1::2/64 dev veth_vpp1
77    ip route add 6:0:2::0/64 via 6:0:1::1
78  "
79
80  ip netns exec vppns2 \
81  bash -c "
82    ip link set dev lo up
83    ip addr add 6.0.2.2/24 dev veth_vpp2
84    ip route add 6.0.1.0/24 via 6.0.2.1
85    ip addr add 6:0:2::2/64 dev veth_vpp2
86    ip route add 6:0:1::0/64 via 6:0:2::1
87  "
88
89  # generate config files
90  ./scripts/generate_config.py ${VPP_LITE_CONF} ${CFG_METHOD}
91
92  start_vpp 5002 vpp1
93  start_vpp 5003 vpp2
94  start_vpp 5004 vpp3
95
96  sleep 2
97  echo "* Selected configuration method: $CFG_METHOD"
98  if [ "$CFG_METHOD" == "cli" ] ; then
99    echo "exec ${VPP_LITE_CONF}/vpp1.cli" | nc 0 5002
100    echo "exec ${VPP_LITE_CONF}/vpp2.cli" | nc 0 5003
101    echo "exec ${VPP_LITE_CONF}/vpp3.cli" | nc 0 5004
102  elif [ "$CFG_METHOD" == "vat" ] ; then
103    ${VPP_API_TEST} chroot prefix vpp1 script in ${VPP_LITE_CONF}/vpp1.vat
104    ${VPP_API_TEST} chroot prefix vpp2 script in ${VPP_LITE_CONF}/vpp2.vat
105    ${VPP_API_TEST} chroot prefix vpp3 script in ${VPP_LITE_CONF}/vpp3.vat
106  else
107    echo "=== WARNING:"
108    echo "=== Invalid configuration method selected!"
109    echo "=== To resolve this set env variable CFG_METHOD to vat or cli."
110    echo "==="
111  fi
112}
113