diff options
| -rw-r--r-- | samples/bpf/tcbpf2_kern.c | 58 | ||||
| -rwxr-xr-x | samples/bpf/test_tunnel_bpf.sh | 56 |
2 files changed, 106 insertions, 8 deletions
diff --git a/samples/bpf/tcbpf2_kern.c b/samples/bpf/tcbpf2_kern.c index 7a15289da6cc..c1917d968fb4 100644 --- a/samples/bpf/tcbpf2_kern.c +++ b/samples/bpf/tcbpf2_kern.c @@ -1,4 +1,5 @@ /* Copyright (c) 2016 VMware + * Copyright (c) 2016 Facebook * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public @@ -188,4 +189,61 @@ int _geneve_get_tunnel(struct __sk_buff *skb) return TC_ACT_OK; } +SEC("ipip_set_tunnel") +int _ipip_set_tunnel(struct __sk_buff *skb) +{ + struct bpf_tunnel_key key = {}; + void *data = (void *)(long)skb->data; + struct iphdr *iph = data; + struct tcphdr *tcp = data + sizeof(*iph); + void *data_end = (void *)(long)skb->data_end; + int ret; + + /* single length check */ + if (data + sizeof(*iph) + sizeof(*tcp) > data_end) { + ERROR(1); + return TC_ACT_SHOT; + } + + key.tunnel_ttl = 64; + if (iph->protocol == IPPROTO_ICMP) { + key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */ + } else { + if (iph->protocol != IPPROTO_TCP || iph->ihl != 5) + return TC_ACT_SHOT; + + if (tcp->dest == htons(5200)) + key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */ + else if (tcp->dest == htons(5201)) + key.remote_ipv4 = 0xac100165; /* 172.16.1.101 */ + else + return TC_ACT_SHOT; + } + + ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), 0); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + return TC_ACT_OK; +} + +SEC("ipip_get_tunnel") +int _ipip_get_tunnel(struct __sk_buff *skb) +{ + int ret; + struct bpf_tunnel_key key; + char fmt[] = "remote ip 0x%x\n"; + + ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + bpf_trace_printk(fmt, sizeof(fmt), key.remote_ipv4); + return TC_ACT_OK; +} + char _license[] SEC("license") = "GPL"; diff --git a/samples/bpf/test_tunnel_bpf.sh b/samples/bpf/test_tunnel_bpf.sh index 4956589a83ae..1ff634f187b7 100755 --- a/samples/bpf/test_tunnel_bpf.sh +++ b/samples/bpf/test_tunnel_bpf.sh @@ -9,15 +9,13 @@ # local 172.16.1.200 remote 172.16.1.100 # veth1 IP: 172.16.1.200, tunnel dev <type>11 -set -e - function config_device { ip netns add at_ns0 ip link add veth0 type veth peer name veth1 ip link set veth0 netns at_ns0 ip netns exec at_ns0 ip addr add 172.16.1.100/24 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up - ip link set dev veth1 up + ip link set dev veth1 up mtu 1500 ip addr add dev veth1 172.16.1.200/24 } @@ -67,6 +65,19 @@ function add_geneve_tunnel { ip addr add dev $DEV 10.1.1.200/24 } +function add_ipip_tunnel { + # in namespace + ip netns exec at_ns0 \ + ip link add dev $DEV_NS type $TYPE local 172.16.1.100 remote 172.16.1.200 + ip netns exec at_ns0 ip link set dev $DEV_NS up + ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 + + # out of namespace + ip link add dev $DEV type $TYPE external + ip link set dev $DEV up + ip addr add dev $DEV 10.1.1.200/24 +} + function attach_bpf { DEV=$1 SET_TUNNEL=$2 @@ -85,6 +96,7 @@ function test_gre { attach_bpf $DEV gre_set_tunnel gre_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 + cleanup } function test_vxlan { @@ -96,6 +108,7 @@ function test_vxlan { attach_bpf $DEV vxlan_set_tunnel vxlan_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 + cleanup } function test_geneve { @@ -107,21 +120,48 @@ function test_geneve { attach_bpf $DEV geneve_set_tunnel geneve_get_tunnel ping -c 1 10.1.1.100 ip netns exec at_ns0 ping -c 1 10.1.1.200 + cleanup +} + +function test_ipip { + TYPE=ipip + DEV_NS=ipip00 + DEV=ipip11 + config_device + tcpdump -nei veth1 & + cat /sys/kernel/debug/tracing/trace_pipe & + add_ipip_tunnel + ethtool -K veth1 gso off gro off rx off tx off + ip link set dev veth1 mtu 1500 + attach_bpf $DEV ipip_set_tunnel ipip_get_tunnel + ping -c 1 10.1.1.100 + ip netns exec at_ns0 ping -c 1 10.1.1.200 + ip netns exec at_ns0 iperf -sD -p 5200 > /dev/null + sleep 0.2 + iperf -c 10.1.1.100 -n 5k -p 5200 + cleanup } function cleanup { + set +ex + pkill iperf ip netns delete at_ns0 ip link del veth1 - ip link del $DEV + ip link del ipip11 + ip link del gretap11 + ip link del geneve11 + pkill tcpdump + pkill cat + set -ex } +cleanup echo "Testing GRE tunnel..." test_gre -cleanup echo "Testing VXLAN tunnel..." test_vxlan -cleanup echo "Testing GENEVE tunnel..." test_geneve -cleanup -echo "Success" +echo "Testing IPIP tunnel..." +test_ipip +echo "*** PASS ***" |