tests: Add test for ephemeral port binding in listen()

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

2 files changed, 116 insertions, 0 deletions

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 9679177..aecf6b8 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -20,6 +20,7 @@ target_link_libraries(${TORTURE_LIBRARY}
 
 set(SWRAP_TESTS
     test_ioctl
+    test_tcp_listen
     test_echo_tcp_socket
     test_echo_tcp_connect
     test_echo_tcp_bind
diff --git a/tests/test_tcp_listen.c b/tests/test_tcp_listen.c
new file mode 100644
index 0000000..5641c47
--- /dev/null
+++ b/tests/test_tcp_listen.c
@@ -0,0 +1,115 @@
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+#include "config.h"
+#include "torture.h"
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#ifdef HAVE_RPC_RPC_H
+#include <rpc/rpc.h>
+#endif
+
+static int setup(void **state)
+{
+	torture_setup_socket_dir(state);
+
+	return 0;
+}
+
+static int teardown(void **state)
+{
+	torture_teardown_socket_dir(state);
+
+	return 0;
+}
+
+static void test_listen_unbound_ipv4(void **state)
+{
+	struct torture_address addr = {
+		.sa_socklen = sizeof(struct sockaddr_storage),
+	};
+	int rc;
+	int s1;
+	int s2;
+
+	(void) state; /* unused */
+
+	s1 = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	assert_return_code(s1, errno);
+
+	rc = listen(s1, SOMAXCONN);
+	assert_return_code(rc, errno);
+
+	rc = getsockname(s1, &addr.sa.s, &addr.sa_socklen);
+	assert_return_code(rc, errno);
+	assert_int_equal(addr.sa_socklen, sizeof(struct sockaddr_in));
+	assert_in_range(ntohs(addr.sa.in.sin_port), 1024, 65535);
+
+	s2 = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	assert_return_code(s2, errno);
+
+	rc = connect(s2, &addr.sa.s, addr.sa_socklen);
+	assert_return_code(rc, errno);
+
+	close(s1);
+	close(s2);
+}
+
+#ifdef HAVE_IPV6
+static void test_listen_unbound_ipv6(void **state)
+{
+	struct torture_address addr = {
+		.sa_socklen = sizeof(struct sockaddr_storage),
+	};
+	int rc;
+	int s1;
+	int s2;
+
+	(void) state; /* unused */
+
+	s1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
+	assert_return_code(s1, errno);
+
+	rc = listen(s1, SOMAXCONN);
+	assert_return_code(rc, errno);
+
+	rc = getsockname(s1, &addr.sa.s, &addr.sa_socklen);
+	assert_return_code(rc, errno);
+	assert_int_equal(addr.sa_socklen, sizeof(struct sockaddr_in6));
+	assert_in_range(ntohs(addr.sa.in6.sin6_port), 1024, 65535);
+
+	s2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
+	assert_return_code(s2, errno);
+
+	rc = connect(s2, &addr.sa.s, addr.sa_socklen);
+	assert_return_code(rc, errno);
+
+	close(s1);
+	close(s2);
+}
+#endif /* HAVE_IPV6 */
+
+int main(void) {
+	int rc;
+
+	const struct CMUnitTest tcp_listen_tests[] = {
+		cmocka_unit_test(test_listen_unbound_ipv4),
+#ifdef HAVE_IPV6
+		cmocka_unit_test(test_listen_unbound_ipv6),
+#endif /* HAVE_IPV6 */
+	};
+
+	rc = cmocka_run_group_tests(tcp_listen_tests, setup, teardown);
+
+	return rc;
+}