Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d37e3bb7 authored by William Tu's avatar William Tu Committed by David S. Miller
Browse files

samples/bpf: add ip6erspan sample code 



Extend the existing tests for ip6erspan.

Signed-off-by: default avatarWilliam Tu <u9012063@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ef7baf5e

samples/bpf/tcbpf2_kern.c

+58 −0
Original line number Diff line number Diff line
@@ -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)

{

samples/bpf/test_tunnel_bpf.sh

+37 −0
Original line number Diff line number Diff line
@@ -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..."