diff options
| author | Christian Ehrig <cehrig@cloudflare.com> | 2022-12-18 06:17:32 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-12-19 23:53:15 +0100 |
| commit | ac6e45e05857464a1e347c50da9917141f1fbb80 (patch) | |
| tree | 5e5a858c3db5f5e6e6b36a59663ab0ad85a0403b /tools/testing/selftests | |
| parent | e26aa600ba6a62fe84659f1df497a381bab6d07e (diff) | |
selftests/bpf: Add BPF_F_NO_TUNNEL_KEY test
This patch adds a selftest simulating a GRE sender and receiver using
tunnel headers without tunnel keys. It validates if packets encapsulated
using BPF_F_NO_TUNNEL_KEY are decapsulated by a GRE receiver not
configured with tunnel keys.
Signed-off-by: Christian Ehrig <cehrig@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20221218051734.31411-2-cehrig@cloudflare.com
Diffstat (limited to 'tools/testing/selftests')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_tunnel_kern.c | 21 | ||||
| -rwxr-xr-x | tools/testing/selftests/bpf/test_tunnel.sh | 40 |
2 files changed, 58 insertions, 3 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c index 98af55f0bcd3..508da4a23c4f 100644 --- a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c +++ b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c @@ -82,6 +82,27 @@ int gre_set_tunnel(struct __sk_buff *skb) } SEC("tc") +int gre_set_tunnel_no_key(struct __sk_buff *skb) +{ + int ret; + struct bpf_tunnel_key key; + + __builtin_memset(&key, 0x0, sizeof(key)); + key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */ + key.tunnel_ttl = 64; + + ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), + BPF_F_ZERO_CSUM_TX | BPF_F_SEQ_NUMBER | + BPF_F_NO_TUNNEL_KEY); + if (ret < 0) { + log_err(ret); + return TC_ACT_SHOT; + } + + return TC_ACT_OK; +} + +SEC("tc") int gre_get_tunnel(struct __sk_buff *skb) { int ret; diff --git a/tools/testing/selftests/bpf/test_tunnel.sh b/tools/testing/selftests/bpf/test_tunnel.sh index 2eaedc1d9ed3..06857b689c11 100755 --- a/tools/testing/selftests/bpf/test_tunnel.sh +++ b/tools/testing/selftests/bpf/test_tunnel.sh @@ -66,15 +66,20 @@ config_device() add_gre_tunnel() { + tun_key= + if [ -n "$1" ]; then + tun_key="key $1" + fi + # at_ns0 namespace ip netns exec at_ns0 \ - ip link add dev $DEV_NS type $TYPE seq key 2 \ + ip link add dev $DEV_NS type $TYPE seq $tun_key \ 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 # root namespace - ip link add dev $DEV type $TYPE key 2 external + ip link add dev $DEV type $TYPE $tun_key external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } @@ -238,7 +243,7 @@ test_gre() check $TYPE config_device - add_gre_tunnel + add_gre_tunnel 2 attach_bpf $DEV gre_set_tunnel gre_get_tunnel ping $PING_ARG 10.1.1.100 check_err $? @@ -253,6 +258,30 @@ test_gre() echo -e ${GREEN}"PASS: $TYPE"${NC} } +test_gre_no_tunnel_key() +{ + TYPE=gre + DEV_NS=gre00 + DEV=gre11 + ret=0 + + check $TYPE + config_device + add_gre_tunnel + attach_bpf $DEV gre_set_tunnel_no_key gre_get_tunnel + ping $PING_ARG 10.1.1.100 + check_err $? + ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 + check_err $? + cleanup + + if [ $ret -ne 0 ]; then + echo -e ${RED}"FAIL: $TYPE"${NC} + return 1 + fi + echo -e ${GREEN}"PASS: $TYPE"${NC} +} + test_ip6gre() { TYPE=ip6gre @@ -589,6 +618,7 @@ cleanup() ip link del ipip6tnl11 2> /dev/null ip link del ip6ip6tnl11 2> /dev/null ip link del gretap11 2> /dev/null + ip link del gre11 2> /dev/null ip link del ip6gre11 2> /dev/null ip link del ip6gretap11 2> /dev/null ip link del geneve11 2> /dev/null @@ -641,6 +671,10 @@ bpf_tunnel_test() test_gre errors=$(( $errors + $? )) + echo "Testing GRE tunnel (without tunnel keys)..." + test_gre_no_tunnel_key + errors=$(( $errors + $? )) + echo "Testing IP6GRE tunnel..." test_ip6gre errors=$(( $errors + $? )) |