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samples/bpf: add ip6erspan sample code

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Extend the existing tests for ip6erspan.

Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
William Tu 2017-12-05 15:15:45 -08:00 committed by David S. Miller
parent ef7baf5e08
commit d37e3bb774
2 changed files with 95 additions and 0 deletions
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58
samples/bpf/tcbpf2_kern.c
View file

@ -181,6 +181,64 @@ int _erspan_get_tunnel(struct __sk_buff *skb)
return TC_ACT_OK;
}
SEC("ip4ip6erspan_set_tunnel")
int _ip4ip6erspan_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key;
struct erspan_metadata md;
int ret;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv6[3] = _htonl(0x11);
key.tunnel_id = 2;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
md.index = htonl(123);
ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ip4ip6erspan_get_tunnel")
int _ip4ip6erspan_get_tunnel(struct __sk_buff *skb)
{
char fmt[] = "key %d remote ip6 ::%x erspan index 0x%x\n";
struct bpf_tunnel_key key;
struct erspan_metadata md;
u32 index;
int ret;
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
ret = bpf_skb_get_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
index = bpf_ntohl(md.index);
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv6[0], index);
return TC_ACT_OK;
}
SEC("vxlan_set_tunnel")
int _vxlan_set_tunnel(struct __sk_buff *skb)
{

37
samples/bpf/test_tunnel_bpf.sh
View file

@ -70,6 +70,28 @@ function add_erspan_tunnel {
ip addr add dev $DEV 10.1.1.200/24
}
function add_ip6erspan_tunnel {
# assign ipv6 address
ip netns exec at_ns0 ip addr add ::11/96 dev veth0
ip netns exec at_ns0 ip link set dev veth0 up
ip addr add dev veth1 ::22/96
ip link set dev veth1 up
# in namespace
ip netns exec at_ns0 \
ip link add dev $DEV_NS type $TYPE seq key 2 erspan 123 \
local ::11 remote ::22
ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
ip netns exec at_ns0 ip link set dev $DEV_NS up
# out of namespace
ip link add dev $DEV type $TYPE external
ip addr add dev $DEV 10.1.1.200/24
ip link set dev $DEV up
}
function add_vxlan_tunnel {
# Set static ARP entry here because iptables set-mark works
# on L3 packet, as a result not applying to ARP packets,
@ -184,6 +206,18 @@ function test_erspan {
cleanup
}
function test_ip6erspan {
TYPE=ip6erspan
DEV_NS=ip6erspan00
DEV=ip6erspan11
config_device
add_ip6erspan_tunnel
attach_bpf $DEV ip4ip6erspan_set_tunnel ip4ip6erspan_get_tunnel
ping6 -c 3 ::11
ip netns exec at_ns0 ping -c 1 10.1.1.200
cleanup
}
function test_vxlan {
TYPE=vxlan
DEV_NS=vxlan00
@ -239,6 +273,7 @@ function cleanup {
ip link del vxlan11
ip link del geneve11
ip link del erspan11
ip link del ip6erspan11
pkill tcpdump
pkill cat
set -ex
@ -254,6 +289,8 @@ echo "Testing IP6GRETAP tunnel..."
test_ip6gretap
echo "Testing ERSPAN tunnel..."
test_erspan
echo "Testing IP6ERSPAN tunnel..."
test_ip6erspan
echo "Testing VXLAN tunnel..."
test_vxlan
echo "Testing GENEVE tunnel..."