tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2
3[[ -z $TC ]] && TC='tc'
4[[ -z $IP ]] && IP='ip'
5
6REDIRECT_USER='./tc_l2_redirect'
7REDIRECT_BPF='./tc_l2_redirect_kern.o'
8
9RP_FILTER=$(< /proc/sys/net/ipv4/conf/all/rp_filter)
10IPV6_FORWARDING=$(< /proc/sys/net/ipv6/conf/all/forwarding)
11
12function config_common {
13 local tun_type=$1
14
15 $IP netns add ns1
16 $IP netns add ns2
17 $IP link add ve1 type veth peer name vens1
18 $IP link add ve2 type veth peer name vens2
19 $IP link set dev ve1 up
20 $IP link set dev ve2 up
21 $IP link set dev ve1 mtu 1500
22 $IP link set dev ve2 mtu 1500
23 $IP link set dev vens1 netns ns1
24 $IP link set dev vens2 netns ns2
25
26 $IP -n ns1 link set dev lo up
27 $IP -n ns1 link set dev vens1 up
28 $IP -n ns1 addr add 10.1.1.101/24 dev vens1
29 $IP -n ns1 addr add 2401:db01::65/64 dev vens1 nodad
30 $IP -n ns1 route add default via 10.1.1.1 dev vens1
31 $IP -n ns1 route add default via 2401:db01::1 dev vens1
32
33 $IP -n ns2 link set dev lo up
34 $IP -n ns2 link set dev vens2 up
35 $IP -n ns2 addr add 10.2.1.102/24 dev vens2
36 $IP -n ns2 addr add 2401:db02::66/64 dev vens2 nodad
37 $IP -n ns2 addr add 10.10.1.102 dev lo
38 $IP -n ns2 addr add 2401:face::66/64 dev lo nodad
39 $IP -n ns2 link add ipt2 type ipip local 10.2.1.102 remote 10.2.1.1
40 $IP -n ns2 link add ip6t2 type ip6tnl mode any local 2401:db02::66 remote 2401:db02::1
41 $IP -n ns2 link set dev ipt2 up
42 $IP -n ns2 link set dev ip6t2 up
43 $IP netns exec ns2 $TC qdisc add dev vens2 clsact
44 $IP netns exec ns2 $TC filter add dev vens2 ingress bpf da obj $REDIRECT_BPF sec drop_non_tun_vip
45 if [[ $tun_type == "ipip" ]]; then
46 $IP -n ns2 route add 10.1.1.0/24 dev ipt2
47 $IP netns exec ns2 sysctl -q -w net.ipv4.conf.all.rp_filter=0
48 $IP netns exec ns2 sysctl -q -w net.ipv4.conf.ipt2.rp_filter=0
49 else
50 $IP -n ns2 route add 10.1.1.0/24 dev ip6t2
51 $IP -n ns2 route add 2401:db01::/64 dev ip6t2
52 $IP netns exec ns2 sysctl -q -w net.ipv4.conf.all.rp_filter=0
53 $IP netns exec ns2 sysctl -q -w net.ipv4.conf.ip6t2.rp_filter=0
54 fi
55
56 $IP addr add 10.1.1.1/24 dev ve1
57 $IP addr add 2401:db01::1/64 dev ve1 nodad
58 $IP addr add 10.2.1.1/24 dev ve2
59 $IP addr add 2401:db02::1/64 dev ve2 nodad
60
61 $TC qdisc add dev ve2 clsact
62 $TC filter add dev ve2 ingress bpf da obj $REDIRECT_BPF sec l2_to_iptun_ingress_forward
63
64 sysctl -q -w net.ipv4.conf.all.rp_filter=0
65 sysctl -q -w net.ipv6.conf.all.forwarding=1
66}
67
68function cleanup {
69 set +e
70 [[ -z $DEBUG ]] || set +x
71 $IP netns delete ns1 >& /dev/null
72 $IP netns delete ns2 >& /dev/null
73 $IP link del ve1 >& /dev/null
74 $IP link del ve2 >& /dev/null
75 $IP link del ipt >& /dev/null
76 $IP link del ip6t >& /dev/null
77 sysctl -q -w net.ipv4.conf.all.rp_filter=$RP_FILTER
78 sysctl -q -w net.ipv6.conf.all.forwarding=$IPV6_FORWARDING
79 rm -f /sys/fs/bpf/tc/globals/tun_iface
80 [[ -z $DEBUG ]] || set -x
81 set -e
82}
83
84function l2_to_ipip {
85 echo -n "l2_to_ipip $1: "
86
87 local dir=$1
88
89 config_common ipip
90
91 $IP link add ipt type ipip external
92 $IP link set dev ipt up
93 sysctl -q -w net.ipv4.conf.ipt.rp_filter=0
94 sysctl -q -w net.ipv4.conf.ipt.forwarding=1
95
96 if [[ $dir == "egress" ]]; then
97 $IP route add 10.10.1.0/24 via 10.2.1.102 dev ve2
98 $TC filter add dev ve2 egress bpf da obj $REDIRECT_BPF sec l2_to_iptun_ingress_redirect
99 sysctl -q -w net.ipv4.conf.ve1.forwarding=1
100 else
101 $TC qdisc add dev ve1 clsact
102 $TC filter add dev ve1 ingress bpf da obj $REDIRECT_BPF sec l2_to_iptun_ingress_redirect
103 fi
104
105 $REDIRECT_USER -U /sys/fs/bpf/tc/globals/tun_iface -i $(< /sys/class/net/ipt/ifindex)
106
107 $IP netns exec ns1 ping -c1 10.10.1.102 >& /dev/null
108
109 if [[ $dir == "egress" ]]; then
110 # test direct egress to ve2 (i.e. not forwarding from
111 # ve1 to ve2).
112 ping -c1 10.10.1.102 >& /dev/null
113 fi
114
115 cleanup
116
117 echo "OK"
118}
119
120function l2_to_ip6tnl {
121 echo -n "l2_to_ip6tnl $1: "
122
123 local dir=$1
124
125 config_common ip6tnl
126
127 $IP link add ip6t type ip6tnl mode any external
128 $IP link set dev ip6t up
129 sysctl -q -w net.ipv4.conf.ip6t.rp_filter=0
130 sysctl -q -w net.ipv4.conf.ip6t.forwarding=1
131
132 if [[ $dir == "egress" ]]; then
133 $IP route add 10.10.1.0/24 via 10.2.1.102 dev ve2
134 $IP route add 2401:face::/64 via 2401:db02::66 dev ve2
135 $TC filter add dev ve2 egress bpf da obj $REDIRECT_BPF sec l2_to_ip6tun_ingress_redirect
136 sysctl -q -w net.ipv4.conf.ve1.forwarding=1
137 else
138 $TC qdisc add dev ve1 clsact
139 $TC filter add dev ve1 ingress bpf da obj $REDIRECT_BPF sec l2_to_ip6tun_ingress_redirect
140 fi
141
142 $REDIRECT_USER -U /sys/fs/bpf/tc/globals/tun_iface -i $(< /sys/class/net/ip6t/ifindex)
143
144 $IP netns exec ns1 ping -c1 10.10.1.102 >& /dev/null
145 $IP netns exec ns1 ping -6 -c1 2401:face::66 >& /dev/null
146
147 if [[ $dir == "egress" ]]; then
148 # test direct egress to ve2 (i.e. not forwarding from
149 # ve1 to ve2).
150 ping -c1 10.10.1.102 >& /dev/null
151 ping -6 -c1 2401:face::66 >& /dev/null
152 fi
153
154 cleanup
155
156 echo "OK"
157}
158
159cleanup
160test_names="l2_to_ipip l2_to_ip6tnl"
161test_dirs="ingress egress"
162if [[ $# -ge 2 ]]; then
163 test_names=$1
164 test_dirs=$2
165elif [[ $# -ge 1 ]]; then
166 test_names=$1
167fi
168
169for t in $test_names; do
170 for d in $test_dirs; do
171 $t $d
172 done
173done