pf: Very basic forwarding test

This test illustrates the use of scapy to test pf.

Differential Revision:	https://reviews.freebsd.org/D12581

1 files changed, 67 insertions, 0 deletions

diff --git a/tests/sys/netpfil/pf/forward.sh b/tests/sys/netpfil/pf/forward.sh
new file mode 100755
index 000000000000..62ef97b09dc1
--- /dev/null
+++ b/tests/sys/netpfil/pf/forward.sh
@@ -0,0 +1,67 @@
+# $FreeBSD$
+
+. $(atf_get_srcdir)/utils.subr
+
+atf_test_case "v4" "cleanup"
+v4_head()
+{
+	atf_set descr 'Basic forwarding test'
+	atf_set require.user root
+
+	# We need scapy to be installed for out test scripts to work
+	atf_set require.progs scapy
+}
+
+v4_body()
+{
+	pft_init
+
+	epair_send=$(pft_mkepair)
+	ifconfig ${epair_send}a 192.0.2.1/24 up
+
+	epair_recv=$(pft_mkepair)
+	ifconfig ${epair_recv}a up
+
+	pft_mkjail alcatraz ${epair_send}b ${epair_recv}b
+	jexec alcatraz ifconfig ${epair_send}b 192.0.2.2/24 up
+	jexec alcatraz ifconfig ${epair_recv}b 198.51.100.2/24 up
+	jexec alcatraz sysctl net.inet.ip.forwarding=1
+	jexec alcatraz arp -s 198.51.100.3 00:01:02:03:04:05
+	route add -net 198.51.100.0/24 192.0.2.2
+
+	# Sanity check, can we forward ICMP echo requests without pf?
+	atf_check -s exit:0 $(atf_get_srcdir)/pft_ping.py \
+		--sendif ${epair_send}a \
+		--to 198.51.100.3 \
+		--recvif ${epair_recv}a
+
+	# Forward with pf enabled
+	printf "block in\n" | jexec alcatraz pfctl -ef -
+	atf_check -s exit:1 $(atf_get_srcdir)/pft_ping.py \
+		--sendif ${epair_send}a \
+		--to 198.51.100.3 \
+		--recvif ${epair_recv}a
+
+	printf "block out\n" | jexec alcatraz pfctl -f -
+	atf_check -s exit:1 $(atf_get_srcdir)/pft_ping.py \
+		--sendif ${epair_send}a \
+		--to 198.51.100.3 \
+		--recv ${epair_recv}a
+
+	# Allow ICMP
+	printf "block in\npass in proto icmp\n" | jexec alcatraz pfctl -f -
+	atf_check -s exit:0 $(atf_get_srcdir)/pft_ping.py \
+		--sendif ${epair_send}a \
+		--to 198.51.100.3 \
+		--recvif ${epair_recv}a
+}
+
+v4_cleanup()
+{
+	pft_cleanup
+}
+
+atf_init_test_cases()
+{
+	atf_add_test_case "v4"
+}