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authorEyal Birger <eyal.birger@gmail.com>2018-04-24 17:50:30 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2018-04-24 22:26:58 +0200
commit29a36f9eef30b7f008b722a753a84b314f981037 (patch)
tree9790a515413c05b19aa0eb988ef002a2cdb1dc05 /samples
parent12bed760a78da6e12ac8252fec64d019a9eac523 (diff)
downloadlinux-0-day-29a36f9eef30b7f008b722a753a84b314f981037.tar.gz
linux-0-day-29a36f9eef30b7f008b722a753a84b314f981037.tar.xz
samples/bpf: extend test_tunnel_bpf.sh with xfrm state test
Add a test for fetching xfrm state parameters from a tc program running on ingress. Signed-off-by: Eyal Birger <eyal.birger@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples')
-rw-r--r--samples/bpf/tcbpf2_kern.c16
-rwxr-xr-xsamples/bpf/test_tunnel_bpf.sh71
2 files changed, 87 insertions, 0 deletions
diff --git a/samples/bpf/tcbpf2_kern.c b/samples/bpf/tcbpf2_kern.c
index 9a8db7bd6db48..fa260c750fb1b 100644
--- a/samples/bpf/tcbpf2_kern.c
+++ b/samples/bpf/tcbpf2_kern.c
@@ -593,4 +593,20 @@ int _ip6ip6_get_tunnel(struct __sk_buff *skb)
return TC_ACT_OK;
}
+SEC("xfrm_get_state")
+int _xfrm_get_state(struct __sk_buff *skb)
+{
+ struct bpf_xfrm_state x;
+ char fmt[] = "reqid %d spi 0x%x remote ip 0x%x\n";
+ int ret;
+
+ ret = bpf_skb_get_xfrm_state(skb, 0, &x, sizeof(x), 0);
+ if (ret < 0)
+ return TC_ACT_OK;
+
+ bpf_trace_printk(fmt, sizeof(fmt), x.reqid, bpf_ntohl(x.spi),
+ bpf_ntohl(x.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 c265863ccdf92..9c534dc07b36f 100755
--- a/samples/bpf/test_tunnel_bpf.sh
+++ b/samples/bpf/test_tunnel_bpf.sh
@@ -155,6 +155,57 @@ function add_ipip_tunnel {
ip addr add dev $DEV 10.1.1.200/24
}
+function setup_xfrm_tunnel {
+ auth=0x$(printf '1%.0s' {1..40})
+ enc=0x$(printf '2%.0s' {1..32})
+ spi_in_to_out=0x1
+ spi_out_to_in=0x2
+ # in namespace
+ # in -> out
+ ip netns exec at_ns0 \
+ ip xfrm state add src 172.16.1.100 dst 172.16.1.200 proto esp \
+ spi $spi_in_to_out reqid 1 mode tunnel \
+ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc
+ ip netns exec at_ns0 \
+ ip xfrm policy add src 10.1.1.100/32 dst 10.1.1.200/32 dir out \
+ tmpl src 172.16.1.100 dst 172.16.1.200 proto esp reqid 1 \
+ mode tunnel
+ # out -> in
+ ip netns exec at_ns0 \
+ ip xfrm state add src 172.16.1.200 dst 172.16.1.100 proto esp \
+ spi $spi_out_to_in reqid 2 mode tunnel \
+ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc
+ ip netns exec at_ns0 \
+ ip xfrm policy add src 10.1.1.200/32 dst 10.1.1.100/32 dir in \
+ tmpl src 172.16.1.200 dst 172.16.1.100 proto esp reqid 2 \
+ mode tunnel
+ # address & route
+ ip netns exec at_ns0 \
+ ip addr add dev veth0 10.1.1.100/32
+ ip netns exec at_ns0 \
+ ip route add 10.1.1.200 dev veth0 via 172.16.1.200 \
+ src 10.1.1.100
+
+ # out of namespace
+ # in -> out
+ ip xfrm state add src 172.16.1.100 dst 172.16.1.200 proto esp \
+ spi $spi_in_to_out reqid 1 mode tunnel \
+ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc
+ ip xfrm policy add src 10.1.1.100/32 dst 10.1.1.200/32 dir in \
+ tmpl src 172.16.1.100 dst 172.16.1.200 proto esp reqid 1 \
+ mode tunnel
+ # out -> in
+ ip xfrm state add src 172.16.1.200 dst 172.16.1.100 proto esp \
+ spi $spi_out_to_in reqid 2 mode tunnel \
+ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc
+ ip xfrm policy add src 10.1.1.200/32 dst 10.1.1.100/32 dir out \
+ tmpl src 172.16.1.200 dst 172.16.1.100 proto esp reqid 2 \
+ mode tunnel
+ # address & route
+ ip addr add dev veth1 10.1.1.200/32
+ ip route add 10.1.1.100 dev veth1 via 172.16.1.100 src 10.1.1.200
+}
+
function attach_bpf {
DEV=$1
SET_TUNNEL=$2
@@ -278,6 +329,22 @@ function test_ipip {
cleanup
}
+function test_xfrm_tunnel {
+ config_device
+ tcpdump -nei veth1 ip &
+ output=$(mktemp)
+ cat /sys/kernel/debug/tracing/trace_pipe | tee $output &
+ setup_xfrm_tunnel
+ tc qdisc add dev veth1 clsact
+ tc filter add dev veth1 proto ip ingress bpf da obj tcbpf2_kern.o \
+ sec xfrm_get_state
+ ip netns exec at_ns0 ping -c 1 10.1.1.200
+ grep "reqid 1" $output
+ grep "spi 0x1" $output
+ grep "remote ip 0xac100164" $output
+ cleanup
+}
+
function cleanup {
set +ex
pkill iperf
@@ -291,6 +358,8 @@ function cleanup {
ip link del geneve11
ip link del erspan11
ip link del ip6erspan11
+ ip x s flush
+ ip x p flush
pkill tcpdump
pkill cat
set -ex
@@ -316,4 +385,6 @@ echo "Testing GENEVE tunnel..."
test_geneve
echo "Testing IPIP tunnel..."
test_ipip
+echo "Testing IPSec tunnel..."
+test_xfrm_tunnel
echo "*** PASS ***"