Adds two selftests for connect() action with
AF_UNSPEC family flag.
The one is with no landlock restrictions
allows to disconnect already conneted socket
with connect(..., AF_UNSPEC, ...):
- connect_afunspec_no_restictions;
The second one refuses landlocked process
to disconnect already connected socket:
- connect_afunspec_with_restictions;
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@xxxxxxxxxx>
---
Changes since v3:
* Add connect_afunspec_no_restictions test.
* Add connect_afunspec_with_restictions test.
---
.../testing/selftests/landlock/network_test.c | 94 +++++++++++++++++++
1 file changed, 94 insertions(+)
diff --git a/tools/testing/selftests/landlock/network_test.c b/tools/testing/selftests/landlock/network_test.c
index 20f2d94d6d85..6fce31cad368 100644
--- a/tools/testing/selftests/landlock/network_test.c
+++ b/tools/testing/selftests/landlock/network_test.c
@@ -312,4 +312,98 @@ TEST_F_FORK(socket, connect_with_restrictions) {
ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
}
+TEST_F_FORK(socket, connect_afunspec_no_restictions) {
+
+ int sockfd;
+ pid_t child;
+ int status;
+
+ /* Creates a server socket 1 */
+ sockfd = create_socket(_metadata);
+ ASSERT_LE(0, sockfd);
+
+ /* Binds the socket 1 to address with port[0] */
+ ASSERT_EQ(0, bind(sockfd, (struct sockaddr *)&addr[0], sizeof(addr[0])));
+
+ /* Makes connection to socket with port[0] */
+ ASSERT_EQ(0, connect(sockfd, (struct sockaddr *)&addr[0],
+ sizeof(addr[0])));
+
+ child = fork();
+ ASSERT_LE(0, child);
+ if (child == 0) {
+ struct sockaddr addr_unspec = {.sa_family = AF_UNSPEC};
+
+ /* Child tries to disconnect already connected socket */
+ ASSERT_EQ(0, connect(sockfd, (struct sockaddr *)&addr_unspec,
+ sizeof(addr_unspec)));
+ _exit(_metadata->passed ? EXIT_SUCCESS : EXIT_FAILURE);
+ return;
+ }
+ /* Closes listening socket 1 for the parent*/
+ ASSERT_EQ(0, close(sockfd));
+
+ ASSERT_EQ(child, waitpid(child, &status, 0));
+ ASSERT_EQ(1, WIFEXITED(status));
+ ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
+}
+
+TEST_F_FORK(socket, connect_afunspec_with_restictions) {
+
+ int sockfd;
+ pid_t child;
+ int status;
+
+ struct landlock_ruleset_attr ruleset_attr = {
+ .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP |
+ LANDLOCK_ACCESS_NET_CONNECT_TCP,
+ };
+ struct landlock_net_service_attr net_service_1 = {
+ .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP |
+ LANDLOCK_ACCESS_NET_CONNECT_TCP,
+
+ .port = port[0],
+ };
+
+ const int ruleset_fd = landlock_create_ruleset(&ruleset_attr,
+ sizeof(ruleset_attr), 0);
+ ASSERT_LE(0, ruleset_fd);
+
+ /* Allows connect and bind operations to the port[0] socket */
+ ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+ &net_service_1, 0));
+
+ /* Enforces the ruleset. */
+ enforce_ruleset(_metadata, ruleset_fd);
+
+ /* Creates a server socket 1 */
+ sockfd = create_socket(_metadata);
+ ASSERT_LE(0, sockfd);
+
+ /* Binds the socket 1 to address with port[0] */
+ ASSERT_EQ(0, bind(sockfd, (struct sockaddr *)&addr[0], sizeof(addr[0])));
+
+ /* Makes connection to socket with port[0] */
+ ASSERT_EQ(0, connect(sockfd, (struct sockaddr *)&addr[0],
+ sizeof(addr[0])));
+
+ child = fork();
+ ASSERT_LE(0, child);
+ if (child == 0) {
+ struct sockaddr addr_unspec = {.sa_family = AF_UNSPEC};
+
+ /* Child tries to disconnect already connected socket */
+ ASSERT_EQ(-1, connect(sockfd, (struct sockaddr *)&addr_unspec,
+ sizeof(addr_unspec)));
+ ASSERT_EQ(EACCES, errno);
+ _exit(_metadata->passed ? EXIT_SUCCESS : EXIT_FAILURE);
+ return;
+ }
+ /* Closes listening socket 1 for the parent*/
+ ASSERT_EQ(0, close(sockfd));
+
+ ASSERT_EQ(child, waitpid(child, &status, 0));
+ ASSERT_EQ(1, WIFEXITED(status));
+ ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
+}
TEST_HARNESS_MAIN
--
2.25.1
