git: 125e395278cf - main - pf tests: test not having an IPv4 address to nat64 to

The branch main has been updated by kp:

URL: https://cgit.FreeBSD.org/src/commit/?id=125e395278cf01811a06bb7fdb2dce6854eafc3c

commit 125e395278cf01811a06bb7fdb2dce6854eafc3c
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2024-12-05 17:23:29 +0000
Commit:     Kristof Provost <kp@FreeBSD.org>
CommitDate: 2024-12-17 10:07:17 +0000

    pf tests: test not having an IPv4 address to nat64 to
    
    This isn't expected to work, for obvious reasons, but we also expect to not
    panic doing this. Exercise this special case.
    
    Sponsored by:   Rubicon Communications, LLC ("Netgate")
---
 tests/sys/netpfil/pf/nat64.sh | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/tests/sys/netpfil/pf/nat64.sh b/tests/sys/netpfil/pf/nat64.sh
index c1202dfee2e8..809d058d34c9 100644
--- a/tests/sys/netpfil/pf/nat64.sh
+++ b/tests/sys/netpfil/pf/nat64.sh
@@ -235,6 +235,46 @@ tos_cleanup()
 	pft_cleanup
 }
 
+atf_test_case "no_v4" "cleanup"
+no_v4_head()
+{
+	atf_set descr 'Test error handling when there is no IPv4 address to translate to'
+	atf_set require.user root
+}
+
+no_v4_body()
+{
+	pft_init
+
+	epair_link=$(vnet_mkepair)
+	epair=$(vnet_mkepair)
+
+	ifconfig ${epair}a inet6 2001:db8::2/64 up no_dad
+	route -6 add default 2001:db8::1
+
+	vnet_mkjail rtr ${epair}b ${epair_link}a
+	jexec rtr ifconfig ${epair}b inet6 2001:db8::1/64 up no_dad
+
+	vnet_mkjail dst ${epair_link}b
+	jexec dst ifconfig ${epair_link}b 192.0.2.2/24 up
+	jexec dst route add default 192.0.2.1
+
+	# Sanity check
+	atf_check -s exit:0 -o ignore \
+	    ping6 -c 1 2001:db8::1
+
+	jexec rtr pfctl -e
+	pft_set_rules rtr \
+	    "pass in on ${epair}b inet6 from any to 64:ff9b::/96 af-to inet from (${epair_link}a)"
+
+	atf_check -s exit:2 -o ignore \
+	    ping6 -c 3 64:ff9b::192.0.2.2
+}
+
+no_v4_cleanup()
+{
+	pft_cleanup
+}
 atf_init_test_cases()
 {
 	atf_add_test_case "icmp_echo"
@@ -243,4 +283,5 @@ atf_init_test_cases()
 	atf_add_test_case "udp"
 	atf_add_test_case "sctp"
 	atf_add_test_case "tos"
+	atf_add_test_case "no_v4"
 }