From 9321249f7319c9f5460d2674ee0d86424101f842 Mon Sep 17 00:00:00 2001
From: Kristof Provost <kp@FreeBSD.org>
Date: Fri, 30 Apr 2021 17:07:23 +0200
Subject: [PATCH] pf tests: Test killing states by gateway

MFC after:	1 week
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D30059

(cherry picked from commit c2e11d81d295f7d55ac8b6858b09d8fa123cbfe8)
---
 tests/sys/netpfil/pf/killstate.sh | 60 +++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/tests/sys/netpfil/pf/killstate.sh b/tests/sys/netpfil/pf/killstate.sh
index 94363ed69ec..ae0a4b88b22 100644
--- a/tests/sys/netpfil/pf/killstate.sh
+++ b/tests/sys/netpfil/pf/killstate.sh
@@ -246,9 +246,69 @@ multilabel_cleanup()
 	pft_cleanup
 }
 
+atf_test_case "gateway" "cleanup"
+gateway_head()
+{
+	atf_set descr 'Test killing states by route-to/reply-to address'
+	atf_set require.user root
+	atf_set require.progs scapy
+}
+
+gateway_body()
+{
+	pft_init
+
+	epair=$(vnet_mkepair)
+	ifconfig ${epair}a 192.0.2.1/24 up
+
+	vnet_mkjail alcatraz ${epair}b
+	jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
+	jexec alcatraz pfctl -e
+
+	pft_set_rules alcatraz "block all" \
+		"pass in reply-to (${epair}b 192.0.2.1) proto icmp"
+
+	# Sanity check & establish state
+	# Note: use pft_ping so we always use the same ID, so pf considers all
+	# echo requests part of the same flow.
+	atf_check -s exit:0 -o ignore ${common_dir}/pft_ping.py \
+		--sendif ${epair}a \
+		--to 192.0.2.2 \
+		--replyif ${epair}a
+
+	# Change rules to now deny the ICMP traffic
+	pft_set_rules noflush alcatraz "block all"
+
+	# Established state means we can still ping alcatraz
+	atf_check -s exit:0 -o ignore ${common_dir}/pft_ping.py \
+		--sendif ${epair}a \
+		--to 192.0.2.2 \
+		--replyif ${epair}a
+
+	# Killing with a different gateway does not affect our state
+	jexec alcatraz pfctl -k gateway -k 192.0.2.2
+	atf_check -s exit:0 -o ignore ${common_dir}/pft_ping.py \
+		--sendif ${epair}a \
+		--to 192.0.2.2 \
+		--replyif ${epair}a
+
+	# Killing states with the relevant gateway does terminate our state
+	jexec alcatraz pfctl -k gateway -k 192.0.2.1
+	atf_check -s exit:1 -o ignore ${common_dir}/pft_ping.py \
+		--sendif ${epair}a \
+		--to 192.0.2.2 \
+		--replyif ${epair}a
+}
+
+gateway_cleanup()
+{
+	pft_cleanup
+}
+
 atf_init_test_cases()
 {
 	atf_add_test_case "v4"
 	atf_add_test_case "label"
 	atf_add_test_case "multilabel"
+	atf_add_test_case "gateway"
 }
-- 
2.45.0