selftests/tls: fix TLS tests with CONFIG_TLS=n

Build bot reports some recent TLS tests are failing
with CONFIG_TLS=n. Correct the expected return code
and skip TLS installation if not supported.

Tested with CONFIG_TLS=n and CONFIG_TLS=m.

Reported-by: kernel test robot <[e-mail]>
Fixes: cf32526c8842 ("selftests/tls: add a test for ULP but no keys")
Fixes: 65d41fb317c6 ("selftests/tls: add a bidirectional test")
Signed-off-by: Jakub Kicinski <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

tools/testing/selftests/net/tls.c

···
 
 	ret = setsockopt(self->fd, IPPROTO_TCP, TCP_ULP, "tls", sizeof("tls"));
 	if (ret != 0) {
-		ASSERT_EQ(errno, ENOTSUPP);
+		ASSERT_EQ(errno, ENOENT);
 		self->notls = true;
 		printf("Failure setting TCP_ULP, testing without tls\n");
 		return;
···
 
 TEST_F(tls, bidir)
 {
-	struct tls12_crypto_info_aes_gcm_128 tls12;
 	char const *test_str = "test_read";
 	int send_len = 10;
 	char buf[10];
 	int ret;
 
-	memset(&tls12, 0, sizeof(tls12));
-	tls12.info.version = TLS_1_3_VERSION;
-	tls12.info.cipher_type = TLS_CIPHER_AES_GCM_128;
+	if (!self->notls) {
+		struct tls12_crypto_info_aes_gcm_128 tls12;
 
-	ret = setsockopt(self->fd, SOL_TLS, TLS_RX, &tls12, sizeof(tls12));
-	ASSERT_EQ(ret, 0);
+		memset(&tls12, 0, sizeof(tls12));
+		tls12.info.version = TLS_1_3_VERSION;
+		tls12.info.cipher_type = TLS_CIPHER_AES_GCM_128;
 
-	ret = setsockopt(self->cfd, SOL_TLS, TLS_TX, &tls12, sizeof(tls12));
-	ASSERT_EQ(ret, 0);
+		ret = setsockopt(self->fd, SOL_TLS, TLS_RX, &tls12,
+				 sizeof(tls12));
+		ASSERT_EQ(ret, 0);
+
+		ret = setsockopt(self->cfd, SOL_TLS, TLS_TX, &tls12,
+				 sizeof(tls12));
+		ASSERT_EQ(ret, 0);
+	}
 
 	ASSERT_EQ(strlen(test_str) + 1, send_len);