Files
open62541/tests/server/check_server_reverseconnect.c
Andreas Ebner 16a739a7c3 fix(server): fail startup when no transport can open a server socket
UA_Server_run_startup ignored the driver results and ran without
listening. It now fails if a transport cannot open its socket and
neither another transport nor a reverse connect reaches the server.
2026-10-13 08:55:20 +02:00

582 lines
22 KiB
C

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2022 (c) basysKom GmbH <opensource@basyskom.com> (Author: Jannis Völker)
*/
#include <open62541/server.h>
#include <open62541/server_config_default.h>
#include <open62541/types.h>
#include <open62541/plugin/log_stdout.h>
#include <open62541/client_config_default.h>
#include "server/ua_server_internal.h"
#include "server/ua_services.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "test_helpers.h"
#include "check.h"
#include "testing_clock.h"
#include "thread_wrapper.h"
static UA_Server *server = NULL;
static UA_Client *client = NULL;
static UA_UInt16 reverseListenPort = 4841;
static UA_UInt16 nextReverseListenPort = 4841;
static char reverseConnectUrl[64];
static int numServerCallbackCalled = 0;
static UA_SecureChannelState serverCallbackStates[64];
static UA_UInt64 reverseConnectHandle = 0;
static int numClientCallbackCalled = 0;
static UA_SecureChannelState clientCallbackStates[100];
#define REVERSE_RECONNECT_INTERVAL_TEST 10
#define REVERSECONNECT_MAX_ITERATIONS 1000
static UA_atomic(uintptr_t) runServer = false;
THREAD_HANDLE server_thread;
THREAD_CALLBACK(serverloop) {
while(UA_atomic_load(&runServer))
UA_Server_run_iterate(server, false);
return 0;
}
static void clientStateCallback(UA_Client *c,
UA_SecureChannelState channelState,
UA_SessionState sessionState,
UA_StatusCode connectStatus) {
ck_assert(numClientCallbackCalled < (int)(sizeof(clientCallbackStates) / sizeof(UA_SecureChannelState)));
clientCallbackStates[numClientCallbackCalled++] = channelState;
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION,
"Client state callback called with state %d", channelState);
}
static void setup(void) {
for(int i = 0; i < numServerCallbackCalled; ++i)
serverCallbackStates[i] = UA_SECURECHANNELSTATE_CLOSED;
for(int i = 0; i < numClientCallbackCalled; ++i)
clientCallbackStates[i] = UA_SECURECHANNELSTATE_CLOSED;
numServerCallbackCalled = 0;
reverseConnectHandle = 0;
numClientCallbackCalled = 0;
reverseListenPort = nextReverseListenPort++;
snprintf(reverseConnectUrl, sizeof(reverseConnectUrl),
"opc.tcp://127.0.0.1:%u", (unsigned)reverseListenPort);
server = UA_Server_newForUnitTest();
UA_ServerConfig *sc = UA_Server_getConfig(server);
UA_Array_delete(sc->serverUrls, sc->serverUrlsSize, &UA_TYPES[UA_TYPES_STRING]);
sc->serverUrls = NULL;
sc->serverUrlsSize = 0;
ck_assert(server != NULL);
sc->reverseReconnectInterval = REVERSE_RECONNECT_INTERVAL_TEST;
client = UA_Client_newForUnitTest();
UA_Client_getConfig(client)->stateCallback = clientStateCallback;
}
static void teardown(void) {
if(UA_atomic_load(&runServer)) {
UA_atomic_store(&runServer, false);
THREAD_JOIN(server_thread);
}
UA_Server_run_shutdown(server);
UA_Server_delete(server);
UA_Client_delete(client);
}
static void serverStateCallback(UA_Server *s, UA_UInt64 handle,
UA_SecureChannelState state,
void *context) {
ck_assert(numServerCallbackCalled <
(int)(sizeof(serverCallbackStates) / sizeof(UA_SecureChannelState)));
serverCallbackStates[numServerCallbackCalled++] = state;
ck_assert_ptr_eq(server, s);
ck_assert_ptr_eq(context, (void *)1234);
ck_assert_uint_eq(handle, reverseConnectHandle);
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION,
"Reverse connect callback called with state %d", state);
}
static void
iterateClient(UA_UInt32 fakeSleep) {
UA_Client_run_iterate(client, 0);
UA_fakeSleep(fakeSleep);
}
static void
iterateClientServer(UA_UInt32 fakeSleep) {
UA_Server_run_iterate(server, false);
/* Give the socket event loop time to make progress. A fully non-blocking
* loop can exhaust REVERSECONNECT_MAX_ITERATIONS before the operating
* system schedules the peer, making the callback assertions flaky. */
UA_Client_run_iterate(client, 1);
UA_fakeSleep(fakeSleep);
}
static void
iterateClientUntilCallbacks(int callbacks, UA_UInt32 fakeSleep) {
for(size_t i = 0; i < REVERSECONNECT_MAX_ITERATIONS &&
numClientCallbackCalled < callbacks; ++i)
iterateClient(fakeSleep);
}
static void
listenForReverseConnect(void) {
const UA_String listenHost = UA_STRING("127.0.0.1");
UA_StatusCode ret =
UA_Client_startListeningForReverseConnect(client, &listenHost, 1,
reverseListenPort);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientUntilCallbacks(numClientCallbackCalled + 1, 1);
ck_assert_int_gt(numClientCallbackCalled, 0);
ck_assert_int_eq(clientCallbackStates[numClientCallbackCalled - 1],
UA_SECURECHANNELSTATE_REVERSE_LISTENING);
}
static void
iterateClientServerUntilCallbacks(int serverCallbacks, int clientCallbacks,
UA_UInt32 fakeSleep) {
for(size_t i = 0; i < REVERSECONNECT_MAX_ITERATIONS &&
(numServerCallbackCalled < serverCallbacks ||
numClientCallbackCalled < clientCallbacks); ++i)
iterateClientServer(fakeSleep);
}
static void
iterateServerUntilCallbacks(int serverCallbacks, UA_UInt32 fakeSleep) {
for(size_t i = 0; i < REVERSECONNECT_MAX_ITERATIONS &&
numServerCallbackCalled < serverCallbacks; ++i) {
UA_Server_run_iterate(server, false);
UA_fakeSleep(fakeSleep);
}
}
static UA_Boolean
serverStatesContainSequence(size_t start, const UA_SecureChannelState *states,
size_t statesSize) {
size_t match = 0;
for(size_t i = start; i < (size_t)numServerCallbackCalled; ++i) {
if(serverCallbackStates[i] == states[match]) {
++match;
if(match == statesSize)
return true;
}
}
return false;
}
static void
iterateClientServerUntilServerSequence(size_t start,
const UA_SecureChannelState *states,
size_t statesSize,
UA_UInt32 fakeSleep) {
for(size_t i = 0; i < REVERSECONNECT_MAX_ITERATIONS &&
!serverStatesContainSequence(start, states, statesSize); ++i)
iterateClientServer(fakeSleep);
}
START_TEST(listenAndTeardown) {
UA_StatusCode ret = UA_STATUSCODE_BADINTERNALERROR;
UA_Server_delete(server);
server = NULL;
const UA_String listenHost = UA_STRING("127.0.0.1");
ret = UA_Client_startListeningForReverseConnect(client, &listenHost, 1,
reverseListenPort);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientUntilCallbacks(1, 1000);
ret = UA_Client_startListeningForReverseConnect(client, &listenHost, 1,
reverseListenPort);
ck_assert_uint_eq(ret, UA_STATUSCODE_BADINVALIDSTATE);
UA_Client_disconnect(client);
iterateClientUntilCallbacks(2, 1);
ck_assert_int_ge(numClientCallbackCalled, 2);
ck_assert_int_eq(clientCallbackStates[0], UA_SECURECHANNELSTATE_REVERSE_LISTENING);
ck_assert(clientCallbackStates[1] == UA_SECURECHANNELSTATE_CLOSING ||
clientCallbackStates[1] == UA_SECURECHANNELSTATE_CLOSED);
} END_TEST
START_TEST(noListenWhileConnected) {
UA_StatusCode ret = UA_STATUSCODE_BADINTERNALERROR;
UA_atomic_store(&runServer, true);
UA_Server_run_startup(server);
THREAD_CREATE(server_thread, serverloop);
UA_Client_connect(client, "opc.tcp://127.0.0.1");
ck_assert_int_ge(numClientCallbackCalled, 5);
ck_assert_int_eq(clientCallbackStates[3], UA_SECURECHANNELSTATE_OPEN);
const UA_String listenHost = UA_STRING("127.0.0.1");
ret = UA_Client_startListeningForReverseConnect(client, &listenHost, 1,
reverseListenPort);
ck_assert_uint_eq(ret, UA_STATUSCODE_BADINVALIDSTATE);
UA_Client_disconnect(client);
ret = UA_Client_startListeningForReverseConnect(client, &listenHost, 1,
reverseListenPort);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
} END_TEST
START_TEST(addBeforeStart) {
UA_StatusCode ret = UA_STATUSCODE_BADINTERNALERROR;
listenForReverseConnect();
ret = UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
serverStateCallback, (void *)1234,
&reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_uint_ne(reverseConnectHandle, 0);
ret = UA_Server_run_startup(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientServerUntilCallbacks(5, 5, 1);
ret = UA_Server_run_shutdown(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_int_eq(numServerCallbackCalled, 5);
ck_assert_int_eq(serverCallbackStates[0], UA_SECURECHANNELSTATE_CONNECTING);
ck_assert_int_eq(serverCallbackStates[1], UA_SECURECHANNELSTATE_RHE_SENT);
ck_assert_int_eq(serverCallbackStates[2], UA_SECURECHANNELSTATE_ACK_SENT);
ck_assert_int_eq(serverCallbackStates[3], UA_SECURECHANNELSTATE_OPEN);
ck_assert_int_eq(serverCallbackStates[4], UA_SECURECHANNELSTATE_CLOSED);
ck_assert_int_ge(numClientCallbackCalled, 5);
ck_assert_int_eq(clientCallbackStates[0], UA_SECURECHANNELSTATE_REVERSE_LISTENING);
ck_assert_int_eq(clientCallbackStates[1], UA_SECURECHANNELSTATE_REVERSE_CONNECTED);
ck_assert_int_eq(clientCallbackStates[2], UA_SECURECHANNELSTATE_HEL_SENT);
ck_assert_int_eq(clientCallbackStates[3], UA_SECURECHANNELSTATE_OPN_SENT);
ck_assert_int_eq(clientCallbackStates[4], UA_SECURECHANNELSTATE_OPEN);
} END_TEST
START_TEST(addAfterStart) {
UA_StatusCode ret = UA_STATUSCODE_BADINTERNALERROR;
ret = UA_Server_run_startup(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
const UA_String listenHost = UA_STRING("127.0.0.1");
ret = UA_Client_startListeningForReverseConnect(client, &listenHost, 1,
reverseListenPort);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientServer(1);
ret = UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
serverStateCallback, (void *)1234,
&reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_uint_ne(reverseConnectHandle, 0);
iterateClientServerUntilCallbacks(4, 0, 1);
UA_Server_removeReverseConnect(server, reverseConnectHandle);
iterateServerUntilCallbacks(5, 1);
ret = UA_Server_run_shutdown(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_int_eq(numServerCallbackCalled, 5);
ck_assert_int_eq(serverCallbackStates[0], UA_SECURECHANNELSTATE_CONNECTING);
ck_assert_int_eq(serverCallbackStates[1], UA_SECURECHANNELSTATE_RHE_SENT);
ck_assert_int_eq(serverCallbackStates[2], UA_SECURECHANNELSTATE_ACK_SENT);
ck_assert_int_eq(serverCallbackStates[3], UA_SECURECHANNELSTATE_OPEN);
ck_assert_int_eq(serverCallbackStates[4], UA_SECURECHANNELSTATE_CLOSED);
} END_TEST
START_TEST(checkReconnect) {
UA_StatusCode ret = UA_STATUSCODE_BADINTERNALERROR;
listenForReverseConnect();
ret = UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
serverStateCallback, (void *)1234,
&reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_uint_ne(reverseConnectHandle, 0);
ret = UA_Server_run_startup(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
const UA_SecureChannelState openSequence[] = {
UA_SECURECHANNELSTATE_CONNECTING,
UA_SECURECHANNELSTATE_RHE_SENT,
UA_SECURECHANNELSTATE_ACK_SENT,
UA_SECURECHANNELSTATE_OPEN
};
iterateClientServerUntilServerSequence(0, openSequence, 4, 1);
ck_assert(serverStatesContainSequence(0, openSequence, 4));
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_APPLICATION,
"Stop listening and wait for reconnect");
size_t reconnectStart = (size_t)numServerCallbackCalled;
ret = UA_Client_disconnectAsync(client);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
const UA_SecureChannelState reconnectSequence[] = {
UA_SECURECHANNELSTATE_CONNECTING
};
iterateClientServerUntilServerSequence(
reconnectStart, reconnectSequence, 1,
UA_Server_getConfig(server)->reverseReconnectInterval + 1);
ck_assert(serverStatesContainSequence(reconnectStart, reconnectSequence, 1));
listenForReverseConnect();
UA_fakeSleep(UA_Server_getConfig(server)->reverseReconnectInterval + 1);
size_t reopenStart = (size_t)numServerCallbackCalled;
const UA_SecureChannelState reopenSequence[] = {
UA_SECURECHANNELSTATE_RHE_SENT,
UA_SECURECHANNELSTATE_ACK_SENT,
UA_SECURECHANNELSTATE_OPEN
};
iterateClientServerUntilServerSequence(reopenStart, reopenSequence, 3, 1);
ck_assert(serverStatesContainSequence(reopenStart, reopenSequence, 3));
size_t removeStart = (size_t)numServerCallbackCalled;
UA_Server_removeReverseConnect(server, reverseConnectHandle);
const UA_SecureChannelState closeSequence[] = {
UA_SECURECHANNELSTATE_CLOSED
};
iterateClientServerUntilServerSequence(removeStart, closeSequence, 1, 1);
ret = UA_Server_run_shutdown(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert(serverStatesContainSequence(removeStart, closeSequence, 1));
} END_TEST
START_TEST(removeOnShutdownWithConnection) {
UA_StatusCode ret = UA_STATUSCODE_BADINTERNALERROR;
listenForReverseConnect();
ret = UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
serverStateCallback, (void *)1234,
&reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_uint_ne(reverseConnectHandle, 0);
ret = UA_Server_run_startup(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientServerUntilCallbacks(5, 0, 1);
ret = UA_Server_run_shutdown(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_int_eq(numServerCallbackCalled, 5);
ck_assert_int_eq(serverCallbackStates[0], UA_SECURECHANNELSTATE_CONNECTING);
ck_assert_int_eq(serverCallbackStates[1], UA_SECURECHANNELSTATE_RHE_SENT);
ck_assert_int_eq(serverCallbackStates[2], UA_SECURECHANNELSTATE_ACK_SENT);
ck_assert_int_eq(serverCallbackStates[3], UA_SECURECHANNELSTATE_OPEN);
ck_assert_int_eq(serverCallbackStates[4], UA_SECURECHANNELSTATE_CLOSED);
} END_TEST
START_TEST(removeOnShutdownWithoutConnection) {
UA_StatusCode ret = UA_STATUSCODE_BADINTERNALERROR;
ret = UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
serverStateCallback, (void *)1234,
&reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_uint_ne(reverseConnectHandle, 0);
ret = UA_Server_run_startup(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
for(int i = 0; i < 20; ++i) {
UA_Server_run_iterate(server, false);
UA_fakeSleep(1);
if(numServerCallbackCalled == 2)
break;
}
ret = UA_Server_run_shutdown(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_int_eq(numServerCallbackCalled, 2);
ck_assert_int_eq(serverCallbackStates[0], UA_SECURECHANNELSTATE_CONNECTING);
ck_assert_int_eq(serverCallbackStates[1], UA_SECURECHANNELSTATE_CLOSED);
} END_TEST
static UA_UInt64 secondReverseConnectHandle = 0;
static UA_SecureChannelState firstReverseConnectState;
static UA_SecureChannelState secondReverseConnectState;
static void
recordServerStateCallback(UA_Server *s, UA_UInt64 handle,
UA_SecureChannelState state, void *context) {
if(handle == reverseConnectHandle)
firstReverseConnectState = state;
else if(handle == secondReverseConnectHandle)
secondReverseConnectState = state;
}
static void
iterateClientServerUntilState(const UA_SecureChannelState *state,
UA_SecureChannelState expected,
UA_UInt32 fakeSleep) {
for(size_t i = 0; i < REVERSECONNECT_MAX_ITERATIONS &&
*state != expected; ++i)
iterateClientServer(fakeSleep);
}
/* A connected entry stays registered until its connection has closed. An entry
* added in the meantime must not get lost. */
START_TEST(removeConnectedThenAdd) {
firstReverseConnectState = UA_SECURECHANNELSTATE_CLOSED;
secondReverseConnectState = UA_SECURECHANNELSTATE_CLOSED;
secondReverseConnectHandle = 0;
listenForReverseConnect();
UA_StatusCode ret =
UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
recordServerStateCallback, NULL,
&reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ret = UA_Server_run_startup(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientServerUntilState(&firstReverseConnectState,
UA_SECURECHANNELSTATE_OPEN, 1);
ck_assert_int_eq(firstReverseConnectState, UA_SECURECHANNELSTATE_OPEN);
/* Add a new entry while the removed connection is still closing */
ret = UA_Server_removeReverseConnect(server, reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ret = UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
recordServerStateCallback, NULL,
&secondReverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientServerUntilState(&firstReverseConnectState,
UA_SECURECHANNELSTATE_CLOSED, 1);
ck_assert_int_eq(firstReverseConnectState, UA_SECURECHANNELSTATE_CLOSED);
/* The new entry connects once the client listens again */
UA_Client_disconnect(client);
listenForReverseConnect();
iterateClientServerUntilState(&secondReverseConnectState,
UA_SECURECHANNELSTATE_OPEN,
REVERSE_RECONNECT_INTERVAL_TEST + 1);
ck_assert_int_eq(secondReverseConnectState, UA_SECURECHANNELSTATE_OPEN);
ret = UA_Server_removeReverseConnect(server, secondReverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
iterateClientServerUntilState(&secondReverseConnectState,
UA_SECURECHANNELSTATE_CLOSED, 1);
ck_assert_int_eq(secondReverseConnectState, UA_SECURECHANNELSTATE_CLOSED);
ret = UA_Server_run_shutdown(server);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
} END_TEST
static void
setTcpUrl(UA_ServerConfig *config, UA_UInt16 port) {
char url[64];
snprintf(url, sizeof(url), "opc.tcp://127.0.0.1:%u", (unsigned)port);
UA_Array_delete(config->serverUrls, config->serverUrlsSize,
&UA_TYPES[UA_TYPES_STRING]);
config->serverUrls = UA_String_new();
ck_assert_ptr_ne(config->serverUrls, NULL);
config->serverUrlsSize = 1;
config->serverUrls[0] = UA_STRING_ALLOC(url);
config->tcpReuseAddr = false;
}
/* A busy TCP port does not abort the startup, as the server reaches the client
* over its registered reverse connect */
START_TEST(startupWithoutServerSocket) {
UA_Server *blocker = UA_Server_newForUnitTest();
ck_assert_ptr_ne(blocker, NULL);
UA_ServerConfig *bc = UA_Server_getConfig(blocker);
setTcpUrl(bc, 0);
ck_assert_uint_eq(UA_Server_run_startup(blocker), UA_STATUSCODE_GOOD);
UA_UInt16 port = 0;
for(size_t i = 0; i < bc->applicationDescription.discoveryUrlsSize; i++) {
UA_String hostname;
UA_UInt16 urlPort = 0;
if(UA_parseEndpointUrl(&bc->applicationDescription.discoveryUrls[i],
&hostname, &urlPort, NULL) == UA_STATUSCODE_GOOD &&
urlPort != 0)
port = urlPort;
}
ck_assert_uint_ne(port, 0);
setTcpUrl(UA_Server_getConfig(server), port);
listenForReverseConnect();
UA_StatusCode ret =
UA_Server_addReverseConnect(server, UA_STRING(reverseConnectUrl),
serverStateCallback, (void *)1234,
&reverseConnectHandle);
ck_assert_uint_eq(ret, UA_STATUSCODE_GOOD);
ck_assert_uint_eq(UA_Server_run_startup(server), UA_STATUSCODE_GOOD);
iterateClientServerUntilCallbacks(4, 0, 1);
ck_assert_int_ge(numServerCallbackCalled, 4);
ck_assert_int_eq(serverCallbackStates[3], UA_SECURECHANNELSTATE_OPEN);
ck_assert_uint_eq(UA_Server_run_shutdown(blocker), UA_STATUSCODE_GOOD);
ck_assert_uint_eq(UA_Server_delete(blocker), UA_STATUSCODE_GOOD);
} END_TEST
int main(void) {
Suite *s = suite_create("server_reverseconnect");
TCase *tc_call = tcase_create("basics");
tcase_add_checked_fixture(tc_call, setup, teardown);
tcase_add_test(tc_call, listenAndTeardown);
tcase_add_test(tc_call, noListenWhileConnected);
tcase_add_test(tc_call, addBeforeStart);
tcase_add_test(tc_call, addAfterStart);
tcase_add_test(tc_call, checkReconnect);
tcase_add_test(tc_call, removeOnShutdownWithConnection);
tcase_add_test(tc_call, removeOnShutdownWithoutConnection);
tcase_add_test(tc_call, removeConnectedThenAdd);
tcase_add_test(tc_call, startupWithoutServerSocket);
suite_add_tcase(s, tc_call);
SRunner *sr = srunner_create(s);
srunner_set_fork_status(sr, CK_NOFORK);
srunner_run_all(sr, CK_NORMAL);
int number_failed = srunner_ntests_failed(sr);
srunner_free(sr);
return (number_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}