tests UPDATE add client monitoring thread test

tests/CMakeLists.txt

@@ -73,6 +73,7 @@ if(ENABLE_SSH_TLS)
     libnetconf2_test(NAME test_authkeys)
     libnetconf2_test(NAME test_cert_exp_notif)
     libnetconf2_test(NAME test_ch PORT_COUNT 2)
+    libnetconf2_test(NAME test_client_monitoring)
     libnetconf2_test(NAME test_endpt_share_clients PORT_COUNT 4)
     libnetconf2_test(NAME test_ks_ts)
     if (LIBPAM_HAVE_CONFDIR)

tests/test_client_monitoring.c

@@ -0,0 +1,200 @@
+/**
+ * @file test_client_monitoring.c
+ * @author Roman Janota <[email protected]>
+ * @brief libnetconf2 client monitoring thread test
+ *
+ * @copyright
+ * Copyright (c) 2024 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <pthread.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <cmocka.h>
+
+#include "ln2_test.h"
+#include "session_p.h"
+
+#include <libssh/libssh.h>
+
+int TEST_PORT = 10050;
+const char *TEST_PORT_STR = "10050";
+
+void
+monitoring_clb(struct nc_session *sess, void *user_data)
+{
+    pthread_barrier_t *barrier = user_data;
+
+    /* signal the main thread that the monitoring callback was called */
+    pthread_barrier_wait(barrier);
+    printf("Session with ID %d disconnected by the server.\n", nc_session_get_id(sess));
+}
+
+static void *
+client_thread(void *arg)
+{
+    int ret;
+    struct nc_session *session = NULL;
+    struct ln2_test_ctx *test_ctx = arg;
+    pthread_barrier_t monitoring_barrier;
+
+    /* initialize the barrier */
+    ret = pthread_barrier_init(&monitoring_barrier, NULL, 2);
+    assert_int_equal(ret, 0);
+
+    /* start the monitoring thread */
+    ret = nc_client_monitoring_thread_start(monitoring_clb, &monitoring_barrier, NULL);
+    assert_int_equal(ret, 0);
+
+    /* skip all hostkey and known_hosts checks */
+    nc_client_ssh_set_knownhosts_mode(NC_SSH_KNOWNHOSTS_SKIP);
+
+    /* set the search path for the schemas */
+    ret = nc_client_set_schema_searchpath(MODULES_DIR);
+    assert_int_equal(ret, 0);
+
+    /* set the client's username */
+    ret = nc_client_ssh_set_username("test_client_monitoring");
+    assert_int_equal(ret, 0);
+
+    /* add the client's key pair */
+    ret = nc_client_ssh_add_keypair(TESTS_DIR "/data/key_rsa.pub", TESTS_DIR "/data/key_rsa");
+    assert_int_equal(ret, 0);
+
+    /* wait for the server to be ready and connect */
+    pthread_barrier_wait(&test_ctx->barrier);
+    session = nc_connect_ssh("127.0.0.1", TEST_PORT, NULL);
+    assert_non_null(session);
+
+    /* wait for the monitoring thread callback to be called */
+    pthread_barrier_wait(&monitoring_barrier);
+
+    /* stop the monitoring thread */
+    nc_client_monitoring_thread_stop();
+
+    pthread_barrier_destroy(&monitoring_barrier);
+    return NULL;
+}
+
+void *
+server_thread(void *arg)
+{
+    int ret;
+    NC_MSG_TYPE msgtype;
+    struct nc_session *session = NULL;
+    struct nc_pollsession *ps = NULL;
+    struct ln2_test_ctx *test_ctx = arg;
+    int fd;
+    struct linger ling = {1, 0};
+
+    ps = nc_ps_new();
+    assert_non_null(ps);
+
+    /* wait for the client to be ready to connect */
+    pthread_barrier_wait(&test_ctx->barrier);
+
+    /* accept a session and add it to the poll session structure */
+    msgtype = nc_accept(NC_ACCEPT_TIMEOUT, test_ctx->ctx, &session);
+    assert_int_equal(msgtype, NC_MSG_HELLO);
+
+    /* get the session's fd */
+    fd = ssh_get_fd(session->ti.libssh.session);
+    assert_int_not_equal(fd, -1);
+
+    /* set the socket to close immediately */
+    ret = setsockopt(fd, SOL_SOCKET, SO_LINGER, &ling, sizeof(ling));
+    assert_int_equal(ret, 0);
+
+    /* add the session to the poll session */
+    ret = nc_ps_add_session(ps, session);
+    assert_int_equal(ret, 0);
+
+    /* poll until the client stops sending messages */
+    do {
+        ret = nc_ps_poll(ps, NC_PS_POLL_TIMEOUT, NULL);
+    } while ((ret & NC_PSPOLL_RPC));
+
+    /* free the session (it will close the socket -> client needs to detect this) */
+    nc_ps_clear(ps, 1, NULL);
+    nc_ps_free(ps);
+    return NULL;
+}
+
+static void
+test_nc_client_monitoring(void **state)
+{
+    int ret, i;
+    pthread_t tids[2];
+
+    ret = pthread_create(&tids[0], NULL, client_thread, *state);
+    assert_int_equal(ret, 0);
+    ret = pthread_create(&tids[1], NULL, server_thread, *state);
+    assert_int_equal(ret, 0);
+
+    for (i = 0; i < 2; i++) {
+        pthread_join(tids[i], NULL);
+    }
+}
+
+static int
+setup(void **state)
+{
+    int ret;
+    struct lyd_node *tree = NULL;
+    struct ln2_test_ctx *test_ctx;
+
+    /* global setup */
+    ret = ln2_glob_test_setup(&test_ctx);
+    assert_int_equal(ret, 0);
+
+    *state = test_ctx;
+
+    /* add endpoint */
+    ret = nc_server_config_add_address_port(test_ctx->ctx, "endpt", NC_TI_SSH, "127.0.0.1", TEST_PORT, &tree);
+    assert_int_equal(ret, 0);
+
+    /* add hostkey */
+    ret = nc_server_config_add_ssh_hostkey(test_ctx->ctx, "endpt", "hostkey", TESTS_DIR "/data/key_ecdsa", NULL, &tree);
+    assert_int_equal(ret, 0);
+
+    /* add the test client */
+    ret = nc_server_config_add_ssh_user_pubkey(test_ctx->ctx, "endpt", "test_client_monitoring", "pubkey", TESTS_DIR "/data/key_rsa.pub", &tree);
+    assert_int_equal(ret, 0);
+
+    /* configure the server based on the data */
+    ret = nc_server_config_setup_data(tree);
+    assert_int_equal(ret, 0);
+
+    lyd_free_all(tree);
+
+    return 0;
+}
+
+int
+main(void)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test_setup_teardown(test_nc_client_monitoring, setup, ln2_glob_test_teardown)
+    };
+
+    /* try to get ports from the environment, otherwise use the default */
+    if (ln2_glob_test_get_ports(1, &TEST_PORT, &TEST_PORT_STR)) {
+        return 1;
+    }
+
+    setenv("CMOCKA_TEST_ABORT", "1", 1);
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}