[PATCH v1 net 4/8] selftest: tcp: Define the reverse order bind() tests explicitly.

[Kuniyuki Iwashima <kuniyu@amazon.com>]

Currently, bind_wildcard.c calls bind() twice for two addresses and
checks the pre-defined errno against the 2nd call.  Also, the two
bind() calls are swapped to cover various patterns how bind buckets
are created.

However, only testing two addresses is insufficient to detect regression.
So, we will add more bind() calls, and then, we need to define different
errno for each bind() per test case.

As a prepartion, let's define the reverse order bind() test cases as
fixtures.

No functional changes are intended.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 tools/testing/selftests/net/bind_wildcard.c | 67 ++++++++++++++++++---
 1 file changed, 59 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/net/bind_wildcard.c b/tools/testing/selftests/net/bind_wildcard.c
index d65c3bb6ba13..143aae383da3 100644
--- a/tools/testing/selftests/net/bind_wildcard.c
+++ b/tools/testing/selftests/net/bind_wildcard.c
@@ -42,6 +42,7 @@ FIXTURE_VARIANT(bind_wildcard)
 	int expected_errno;
 };
 
+/* (IPv4, IPv6) */
 FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
 {
 	.family = {AF_INET, AF_INET6},
@@ -98,6 +99,63 @@ FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_local)
 	.expected_errno = EADDRINUSE,
 };
 
+/* (IPv6, IPv4) */
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_any, &in4addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_any_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_any, &in4addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_loopback, &in4addr_any},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_local_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_loopback, &in4addr_loopback},
+	.expected_errno = 0,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_any, &in4addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_any_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_any, &in4addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_any)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_loopback, &in4addr_any},
+	.expected_errno = EADDRINUSE,
+};
+
+FIXTURE_VARIANT_ADD(bind_wildcard, v6_v4mapped_local_v4_local)
+{
+	.family = {AF_INET6, AF_INET},
+	.addr = {&in6addr_v4mapped_loopback, &in4addr_loopback},
+	.expected_errno = EADDRINUSE,
+};
+
 static void setup_addr(FIXTURE_DATA(bind_wildcard) *self, int i,
 		       int family, const void *addr_const)
 {
@@ -167,18 +225,11 @@ void bind_sockets(struct __test_metadata *_metadata,
 	close(fd[0]);
 }
 
-TEST_F(bind_wildcard, v4_v6)
+TEST_F(bind_wildcard, plain)
 {
 	bind_sockets(_metadata, self, variant->expected_errno,
 		     &self->addr[0].addr, self->addrlen[0],
 		     &self->addr[1].addr, self->addrlen[1]);
 }
 
-TEST_F(bind_wildcard, v6_v4)
-{
-	bind_sockets(_metadata, self, variant->expected_errno,
-		     &self->addr[1].addr, self->addrlen[1],
-		     &self->addr[0].addr, self->addrlen[0]);
-}
-
 TEST_HARNESS_MAIN
-- 
2.30.2