static UA_StatusCode readInteger(void *handle, const UA_NodeId nodeid, UA_Boolean sourceTimeStamp, const UA_NumericRange *range, UA_DataValue *dataValue) {
dataValue->hasValue = UA_TRUE;
UA_Variant_setScalarCopy(&dataValue->value, (UA_UInt32*)handle, &UA_TYPES[UA_TYPES_INT32]);
//note that this is only possible if the identifier is a string - but we are sure to have one here
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Node read %.*s",nodeid.identifier.string.length, nodeid.identifier.string.data);
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "read value %i", *(UA_UInt32*)handle);
return UA_STATUSCODE_GOOD;
}
static UA_StatusCode writeInteger(void *handle, const UA_NodeId nodeid, const UA_Variant *data, const UA_NumericRange *range){
if(UA_Variant_isScalar(data) && data->type == &UA_TYPES[UA_TYPES_INT32] && data->data){
*(UA_UInt32*)handle = *(UA_Int32*)data->data;
}
//note that this is only possible if the identifier is a string - but we are sure to have one here
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Node written %.*s",nodeid.identifier.string.length, nodeid.identifier.string.data);
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "written value %i", *(UA_UInt32*)handle);
return UA_STATUSCODE_GOOD;
}
static UA_StatusCode
readInteger(void *handle, const UA_NodeId nodeid, UA_Boolean sourceTimeStamp,
const UA_NumericRange *range, UA_DataValue *dataValue) {
dataValue->hasValue = true;
UA_Variant_setScalarCopy(&dataValue->value, (UA_UInt32*)handle, &UA_TYPES[UA_TYPES_INT32]);
// we know the nodeid is a string
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Node read %.*s",
nodeid.identifier.string.length, nodeid.identifier.string.data);
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "read value %i", *(UA_UInt32*)handle);
return UA_STATUSCODE_GOOD;
}
static UA_StatusCode
writeInteger(void *handle, const UA_NodeId nodeid,
const UA_Variant *data, const UA_NumericRange *range) {
if(UA_Variant_isScalar(data) && data->type == &UA_TYPES[UA_TYPES_INT32] && data->data){
*(UA_UInt32*)handle = *(UA_UInt32*)data->data;
}
// we know the nodeid is a string
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Node written %.*s",
nodeid.identifier.string.length, nodeid.identifier.string.data);
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "written value %i", *(UA_UInt32*)handle);
return UA_STATUSCODE_GOOD;
}
//######################################REP JOB#######################
static void testCallback(UA_Server *server, void *data) {
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "testcallback");
ButtonValue = gpioRead(22);
}
static int
run(UA_String *transportProfile, UA_NetworkAddressUrlDataType *networkAddressUrl) {
signal(SIGINT, stopHandler);
signal(SIGTERM, stopHandler);
UA_Server *server = UA_Server_new();
UA_ServerConfig *config = UA_Server_getConfig(server);
UA_ServerConfig_setMinimal(config, 4801, NULL);
/* Details about the PubSubTransportLayer can be found inside the
* tutorial_pubsub_connection */
config->pubsubTransportLayers = (UA_PubSubTransportLayer *)
UA_calloc(2, sizeof(UA_PubSubTransportLayer));
if(!config->pubsubTransportLayers) {
UA_Server_delete(server);
return EXIT_FAILURE;
}
config->pubsubTransportLayers[0] = UA_PubSubTransportLayerUDPMP();
config->pubsubTransportLayersSize++;
#ifdef UA_ENABLE_PUBSUB_ETH_UADP
config->pubsubTransportLayers[1] = UA_PubSubTransportLayerEthernet();
config->pubsubTransportLayersSize++;
#endif
UA_PubSubConnectionConfig connectionConfig;
memset(&connectionConfig, 0, sizeof(connectionConfig));
connectionConfig.name = UA_STRING("UADP Connection 1");
connectionConfig.transportProfileUri = *transportProfile;
connectionConfig.enabled = UA_TRUE;
UA_Variant_setScalar(&connectionConfig.address, networkAddressUrl,
&UA_TYPES[UA_TYPES_NETWORKADDRESSURLDATATYPE]);
UA_NodeId connectionIdent;
UA_StatusCode retval =
UA_Server_addPubSubConnection(server, &connectionConfig, &connectionIdent);
if(retval == UA_STATUSCODE_GOOD)
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER,
"The PubSub Connection was created successfully!");
/* The following lines register the listening on the configured multicast
* address and configure a repeated job, which is used to handle received
* messages. */
UA_PubSubConnection *connection =
UA_PubSubConnection_findConnectionbyId(server, connectionIdent);
if(connection != NULL) {
UA_StatusCode rv = connection->channel->regist(connection->channel, NULL, NULL);
if (rv == UA_STATUSCODE_GOOD) {
UA_UInt64 subscriptionCallbackId;
UA_Server_addRepeatedCallback(server, (UA_ServerCallback)subscriptionPollingCallback,
connection, 100, &subscriptionCallbackId);
} else {
UA_LOG_WARNING(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "register channel failed: %s!",
UA_StatusCode_name(rv));
}
}
retval |= UA_Server_run(server, &running);
UA_Server_delete(server);
return retval == UA_STATUSCODE_GOOD ? EXIT_SUCCESS : EXIT_FAILURE;;
}
static void
serverOnNetworkCallback(const UA_ServerOnNetwork *serverOnNetwork, UA_Boolean isServerAnnounce,
UA_Boolean isTxtReceived, void *data) {
if(discovery_url != NULL || !isServerAnnounce) {
UA_LOG_DEBUG(logger, UA_LOGCATEGORY_SERVER,
"serverOnNetworkCallback called, but discovery URL "
"already initialized or is not announcing. Ignoring.");
return; // we already have everything we need or we only want server announces
}
if(self_discovery_url != NULL && UA_String_equal(&serverOnNetwork->discoveryUrl, self_discovery_url)) {
// skip self
return;
}
if(!isTxtReceived)
return; // we wait until the corresponding TXT record is announced.
// Problem: how to handle if a Server does not announce the
// optional TXT?
// here you can filter for a specific LDS server, e.g. call FindServers on
// the serverOnNetwork to make sure you are registering with the correct
// LDS. We will ignore this for now
UA_LOG_INFO(logger, UA_LOGCATEGORY_SERVER, "Another server announced itself on %.*s",
(int)serverOnNetwork->discoveryUrl.length, serverOnNetwork->discoveryUrl.data);
if(discovery_url != NULL)
UA_free(discovery_url);
discovery_url = (char*)UA_malloc(serverOnNetwork->discoveryUrl.length + 1);
memcpy(discovery_url, serverOnNetwork->discoveryUrl.data, serverOnNetwork->discoveryUrl.length);
discovery_url[serverOnNetwork->discoveryUrl.length] = 0;
}
UA_Boolean
compatibleValue(UA_Server *server, const UA_NodeId *targetDataTypeId,
UA_Int32 targetValueRank, size_t targetArrayDimensionsSize,
const UA_UInt32 *targetArrayDimensions, const UA_Variant *value,
const UA_NumericRange *range) {
/* Empty variant is only allowed for BaseDataType */
if(!value->type) {
if(UA_NodeId_equal(targetDataTypeId, &UA_TYPES[UA_TYPES_VARIANT].typeId) ||
UA_NodeId_equal(targetDataTypeId, &UA_NODEID_NULL))
return true;
UA_LOG_INFO(server->config.logger, UA_LOGCATEGORY_SERVER,
"Only Variables with data type BaseDataType may contain "
"a null (empty) value");
return false;
}
/* Has the value a subtype of the required type? BaseDataType (Variant) can
* be anything... */
if(!compatibleDataType(server, &value->type->typeId, targetDataTypeId))
return false;
/* Array dimensions are checked later when writing the range */
if(range)
return true;
/* See if the array dimensions match. */
if(!compatibleValueArrayDimensions(value, targetArrayDimensionsSize, targetArrayDimensions))
return false;
/* Check if the valuerank allows for the value dimension */
return compatibleValueRankValue(targetValueRank, value);
}
/* call only from the single networking thread */
static UA_StatusCode
ServerNetworkLayerTCP_add(ServerNetworkLayerTCP *layer, UA_Int32 newsockfd) {
UA_Connection *c = malloc(sizeof(UA_Connection));
if(!c)
return UA_STATUSCODE_BADINTERNALERROR;
struct sockaddr_in addr;
socklen_t addrlen = sizeof(struct sockaddr_in);
getsockname(newsockfd, (struct sockaddr*)&addr, &addrlen);
UA_LOG_INFO(layer->logger, UA_LOGCATEGORY_NETWORK, "New Connection %i over TCP from %s:%d",
newsockfd, inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
UA_Connection_init(c);
c->sockfd = newsockfd;
c->handle = layer;
c->localConf = layer->conf;
c->send = socket_write;
c->close = ServerNetworkLayerTCP_closeConnection;
c->getSendBuffer = ServerNetworkLayerGetSendBuffer;
c->releaseSendBuffer = ServerNetworkLayerReleaseSendBuffer;
c->releaseRecvBuffer = ServerNetworkLayerReleaseRecvBuffer;
c->state = UA_CONNECTION_OPENING;
struct ConnectionMapping *nm;
nm = realloc(layer->mappings, sizeof(struct ConnectionMapping)*(layer->mappingsSize+1));
if(!nm) {
UA_LOG_ERROR(layer->logger, UA_LOGCATEGORY_NETWORK, "No memory for a new Connection");
free(c);
return UA_STATUSCODE_BADINTERNALERROR;
}
layer->mappings = nm;
layer->mappings[layer->mappingsSize] = (struct ConnectionMapping){c, newsockfd};
layer->mappingsSize++;
return UA_STATUSCODE_GOOD;
}
/**
* Triggering an event
* ^^^^^^^^^^^^^^^^^^^
* First a node representing an event is generated using ``setUpEvent``. Once our event is good to go, we specify
* a node which emits the event - in this case the server node. We can use ``UA_Server_triggerEvent`` to trigger our
* event onto said node. Passing ``NULL`` as the second-last argument means we will not receive the `EventId`.
* The last boolean argument states whether the node should be deleted. */
static UA_StatusCode
generateEventMethodCallback(UA_Server *server,
const UA_NodeId *sessionId, void *sessionHandle,
const UA_NodeId *methodId, void *methodContext,
const UA_NodeId *objectId, void *objectContext,
size_t inputSize, const UA_Variant *input,
size_t outputSize, UA_Variant *output) {
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "Creating event");
/* set up event */
UA_NodeId eventNodeId;
UA_StatusCode retval = setUpEvent(server, &eventNodeId);
if(retval != UA_STATUSCODE_GOOD) {
UA_LOG_WARNING(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND,
"Creating event failed. StatusCode %s", UA_StatusCode_name(retval));
return retval;
}
retval = UA_Server_triggerEvent(server, eventNodeId,
UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER),
NULL, UA_TRUE);
if(retval != UA_STATUSCODE_GOOD)
UA_LOG_WARNING(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND,
"Triggering event failed. StatusCode %s", UA_StatusCode_name(retval));
return retval;
}
/*receives hello ack, opens secure channel*/
UA_StatusCode
processACKResponseAsync(void *application, UA_Connection *connection,
UA_ByteString *chunk) {
UA_Client *client = (UA_Client*)application;
/* Decode the message */
size_t offset = 0;
UA_TcpMessageHeader messageHeader;
UA_TcpAcknowledgeMessage ackMessage;
client->connectStatus = UA_TcpMessageHeader_decodeBinary (chunk, &offset,
&messageHeader);
client->connectStatus |= UA_TcpAcknowledgeMessage_decodeBinary(
chunk, &offset, &ackMessage);
if (client->connectStatus != UA_STATUSCODE_GOOD) {
UA_LOG_INFO(&client->config.logger, UA_LOGCATEGORY_NETWORK,
"Decoding ACK message failed");
return client->connectStatus;
}
UA_LOG_DEBUG(&client->config.logger, UA_LOGCATEGORY_NETWORK, "Received ACK message");
client->connectStatus =
UA_Connection_processHELACK(connection, &client->config.localConnectionConfig,
(const UA_ConnectionConfig*)&ackMessage);
if(client->connectStatus != UA_STATUSCODE_GOOD)
return client->connectStatus;
client->state = UA_CLIENTSTATE_CONNECTED;
/* Open a SecureChannel. TODO: Select with endpoint */
client->channel.connection = &client->connection;
client->connectStatus = openSecureChannelAsync(client/*, false*/);
return client->connectStatus;
}
static void
writeVariable(UA_Server *server) {
UA_StatusCode retval = UA_Server_writeValueRank(server, pointVariableId, 0);
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND,
"Setting the Value Rank failed with Status Code %s",
UA_StatusCode_name(retval));
}
static UA_StatusCode
readInteger(UA_Server *server, const UA_NodeId *sessionId,
void *sessionContext, const UA_NodeId *nodeId,
void *nodeContext, UA_Boolean includeSourceTimeStamp,
const UA_NumericRange *range, UA_DataValue *value) {
UA_Int32 *myInteger = (UA_Int32*)nodeContext;
value->hasValue = true;
UA_Variant_setScalarCopy(&value->value, myInteger, &UA_TYPES[UA_TYPES_INT32]);
// we know the nodeid is a string
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Node read %.*s",
(int)nodeId->identifier.string.length,
nodeId->identifier.string.data);
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND,
"read value %i", *(UA_UInt32 *)myInteger);
return UA_STATUSCODE_GOOD;
}
/**
* process binary message received from Connection
* dose not modify UA_ByteString you have to free it youself.
* use of connection->getSendBuffer() and connection->sent() to answer Message
*/
void UA_Server_processBinaryMessage(UA_Server *server, UA_Connection *connection, const UA_ByteString *msg) {
size_t pos = 0;
UA_TcpMessageHeader tcpMessageHeader;
do {
if(UA_TcpMessageHeader_decodeBinary(msg, &pos, &tcpMessageHeader)) {
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_NETWORK, "Decoding of message header failed");
connection->close(connection);
break;
}
size_t targetpos = pos - 8 + tcpMessageHeader.messageSize;
switch(tcpMessageHeader.messageTypeAndFinal & 0xffffff) {
case UA_MESSAGETYPEANDFINAL_HELF & 0xffffff:
processHEL(connection, msg, &pos);
break;
case UA_MESSAGETYPEANDFINAL_OPNF & 0xffffff:
processOPN(connection, server, msg, &pos);
break;
case UA_MESSAGETYPEANDFINAL_MSGF & 0xffffff:
#ifndef EXTENSION_STATELESS
if(connection->state != UA_CONNECTION_ESTABLISHED) {
connection->close(connection);
return;
}
#endif
processMSG(connection, server, msg, &pos);
break;
case UA_MESSAGETYPEANDFINAL_CLOF & 0xffffff:
processCLO(connection, server, msg, &pos);
connection->close(connection);
return;
default:
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_NETWORK,
"Unknown request type on Connection %i", connection->sockfd);
}
UA_TcpMessageHeader_deleteMembers(&tcpMessageHeader);
if(pos != targetpos) {
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_NETWORK,
"Message on Connection %i was not entirely processed. "
"Arrived at position %i, skip after the announced length to position %i",
connection->sockfd, pos, targetpos);
pos = targetpos;
}
} while(msg->length > pos);
}
static UA_StatusCode
onRead(void *handle, const UA_NodeId nodeid, UA_Boolean sourceTimeStamp,
const UA_NumericRange *range, UA_DataValue *dataValue) {
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "VALUE READ!!! %i", *(UA_UInt32*)handle);
handle = &ButtonValue;
UA_Variant_setScalarCopy(&dataValue->value, (UA_UInt32*)handle, &UA_TYPES[UA_TYPES_INT32]);
}
static UA_StatusCode
writeInteger(UA_Server *server, const UA_NodeId *sessionId,
void *sessionContext, const UA_NodeId *nodeId,
void *nodeContext, const UA_NumericRange *range,
const UA_DataValue *value) {
UA_Int32 *myInteger = (UA_Int32*)nodeContext;
if(value->hasValue && UA_Variant_isScalar(&value->value) &&
value->value.type == &UA_TYPES[UA_TYPES_INT32] && value->value.data)
*myInteger = *(UA_Int32 *)value->value.data;
// we know the nodeid is a string
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Node written %.*s",
(int)nodeId->identifier.string.length,
nodeId->identifier.string.data);
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND,
"written value %i", *(UA_UInt32 *)myInteger);
return UA_STATUSCODE_GOOD;
}
int main(void) {
signal(SIGINT, stopHandler);
signal(SIGTERM, stopHandler);
UA_ServerConfig *config = UA_ServerConfig_new_minimal(4801, NULL);
/* Details about the PubSubTransportLayer can be found inside the
* tutorial_pubsub_connection */
config->pubsubTransportLayers = (UA_PubSubTransportLayer *)
UA_malloc(sizeof(UA_PubSubTransportLayer));
if (!config->pubsubTransportLayers) {
UA_ServerConfig_delete(config);
return -1;
}
config->pubsubTransportLayers[0] = UA_PubSubTransportLayerUDPMP();
config->pubsubTransportLayersSize++;
UA_Server *server = UA_Server_new(config);
UA_PubSubConnectionConfig connectionConfig;
memset(&connectionConfig, 0, sizeof(connectionConfig));
connectionConfig.name = UA_STRING("UDP-UADP Connection 1");
connectionConfig.transportProfileUri =
UA_STRING("http://opcfoundation.org/UA-Profile/Transport/pubsub-udp-uadp");
connectionConfig.enabled = UA_TRUE;
UA_NetworkAddressUrlDataType networkAddressUrl =
{UA_STRING_NULL , UA_STRING("opc.udp://224.0.0.22:4840/")};
UA_Variant_setScalar(&connectionConfig.address, &networkAddressUrl,
&UA_TYPES[UA_TYPES_NETWORKADDRESSURLDATATYPE]);
UA_NodeId connectionIdent;
UA_StatusCode retval =
UA_Server_addPubSubConnection(server, &connectionConfig, &connectionIdent);
if(retval == UA_STATUSCODE_GOOD)
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER,
"The PubSub Connection was created successfully!");
/* The following lines register the listening on the configured multicast
* address and configure a repeated job, which is used to handle received
* messages. */
UA_PubSubConnection *connection =
UA_PubSubConnection_findConnectionbyId(server, connectionIdent);
if(connection != NULL) {
UA_StatusCode rv = connection->channel->regist(connection->channel, NULL);
if (rv == UA_STATUSCODE_GOOD) {
UA_UInt64 subscriptionCallbackId;
UA_Server_addRepeatedCallback(server, (UA_ServerCallback)subscriptionPollingCallback,
connection, 100, &subscriptionCallbackId);
} else {
UA_LOG_WARNING(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "register channel failed: %s!",
UA_StatusCode_name(rv));
}
}
retval |= UA_Server_run(server, &running);
UA_Server_delete(server);
UA_ServerConfig_delete(config);
return (int)retval;
}
void UA_Server_processBinaryMessage(UA_Server *server, UA_Connection *connection, UA_ByteString *msg) {
if(msg->length <= 0)
return;
size_t pos = 0;
UA_TcpMessageHeader tcpMessageHeader;
do {
if(UA_TcpMessageHeader_decodeBinary(msg, &pos, &tcpMessageHeader)) {
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_COMMUNICATION, "Decoding of message header failed");
connection->close(connection);
break;
}
size_t targetpos = pos - 8 + tcpMessageHeader.messageSize;
switch(tcpMessageHeader.messageTypeAndFinal & 0xffffff) {
case UA_MESSAGETYPEANDFINAL_HELF & 0xffffff:
processHEL(connection, msg, &pos);
break;
case UA_MESSAGETYPEANDFINAL_OPNF & 0xffffff:
processOPN(connection, server, msg, &pos);
break;
case UA_MESSAGETYPEANDFINAL_MSGF & 0xffffff:
#ifndef EXTENSION_STATELESS
if(connection->state != UA_CONNECTION_ESTABLISHED)
connection->close(connection);
else
#endif
processMSG(connection, server, msg, &pos);
break;
case UA_MESSAGETYPEANDFINAL_CLOF & 0xffffff:
processCLO(connection, server, msg, &pos);
connection->close(connection);
return;
}
UA_TcpMessageHeader_deleteMembers(&tcpMessageHeader);
if(pos != targetpos) {
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_COMMUNICATION,
"The message was not entirely processed, skipping to the end");
pos = targetpos;
}
} while(msg->length > (UA_Int32)pos);
}
//################################################BUTTON##########################
static UA_StatusCode
readIntegerB(void *handle, const UA_NodeId nodeid, UA_Boolean sourceTimeStamp,
const UA_NumericRange *range, UA_DataValue *dataValue) {
// Let LED BLink
gpioPWM(17,255);
usleep( 1000 );
gpioPWM(17,0);
// Read Digital value of GPIO 22 and set as Node Value
handle = &ButtonValue;
dataValue->hasValue = true;
UA_Variant_setScalarCopy(&dataValue->value, (UA_UInt32*)handle, &UA_TYPES[UA_TYPES_INT32]);
// we know the nodeid is a string
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "Node read %.*s",
nodeid.identifier.string.length, nodeid.identifier.string.data);
UA_LOG_INFO(logger, UA_LOGCATEGORY_USERLAND, "read value %i", *(UA_UInt32*)handle);
return UA_STATUSCODE_GOOD;
}
int main(void) {
signal(SIGINT, stopHandler); /* catches ctrl-c */
UA_ClientConfig config = UA_ClientConfig_default;
/* default timeout is 5 seconds. Set it to 1 second here for demo */
config.timeout = 1000;
UA_Client *client = UA_Client_new(config);
/* Read the value attribute of the node. UA_Client_readValueAttribute is a
* wrapper for the raw read service available as UA_Client_Service_read. */
UA_Variant value; /* Variants can hold scalar values and arrays of any type */
UA_Variant_init(&value);
/* Endless loop reading the server time */
while (running) {
/* if already connected, this will return GOOD and do nothing */
/* if the connection is closed/errored, the connection will be reset and then reconnected */
/* Alternatively you can also use UA_Client_getState to get the current state */
UA_StatusCode retval = UA_Client_connect(client, "opc.tcp://localhost:4840");
if (retval != UA_STATUSCODE_GOOD) {
UA_LOG_ERROR(logger, UA_LOGCATEGORY_CLIENT, "Not connected. Retrying to connect in 1 second");
/* The connect may timeout after 1 second (see above) or it may fail immediately on network errors */
/* E.g. name resolution errors or unreachable network. Thus there should be a small sleep here */
UA_sleep_ms(1000);
continue;
}
/* NodeId of the variable holding the current time */
const UA_NodeId nodeId =
UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERSTATUS_CURRENTTIME);
retval = UA_Client_readValueAttribute(client, nodeId, &value);
if (retval == UA_STATUSCODE_BADCONNECTIONCLOSED) {
UA_LOG_ERROR(logger, UA_LOGCATEGORY_CLIENT, "Connection was closed. Reconnecting ...");
continue;
}
if (retval == UA_STATUSCODE_GOOD &&
UA_Variant_hasScalarType(&value, &UA_TYPES[UA_TYPES_DATETIME])) {
UA_DateTime raw_date = *(UA_DateTime *) value.data;
UA_String string_date = UA_DateTime_toString(raw_date);
UA_LOG_INFO(logger, UA_LOGCATEGORY_CLIENT, "string date is: %.*s", (int) string_date.length, string_date.data);
UA_String_deleteMembers(&string_date);
}
UA_sleep_ms(1000);
};
/* Clean up */
UA_Variant_deleteMembers(&value);
UA_Client_delete(client); /* Disconnects the client internally */
return UA_STATUSCODE_GOOD;
}
static UA_StatusCode
helloWorldMethod(const UA_NodeId objectId, const UA_Variant *input,
UA_Variant *output, void *handle) {
UA_String *inputStr = (UA_String*)input->data;
UA_String tmp = UA_STRING_ALLOC("Hello ");
if(inputStr->length > 0) {
tmp.data = realloc(tmp.data, tmp.length + inputStr->length);
memcpy(&tmp.data[tmp.length], inputStr->data, inputStr->length);
tmp.length += inputStr->length;
}
UA_Variant_setScalarCopy(output, &tmp, &UA_TYPES[UA_TYPES_STRING]);
UA_String_deleteMembers(&tmp);
UA_LOG_INFO(logger, UA_LOGCATEGORY_SERVER, "Hello World was called");
return UA_STATUSCODE_GOOD;
}
/* callback triggered from the server */
static void ServerNetworkLayerTCP_closeConnection(UA_Connection *connection) {
#ifdef UA_MULTITHREADING
if(uatomic_xchg(&connection->state, UA_CONNECTION_CLOSED) == UA_CONNECTION_CLOSED)
return;
#else
if(connection->state == UA_CONNECTION_CLOSED)
return;
connection->state = UA_CONNECTION_CLOSED;
#endif
ServerNetworkLayerTCP *layer = connection->handle;
UA_LOG_INFO(layer->layer.logger, UA_LOGCATEGORY_NETWORK, "Closing the Connection %i",
connection->sockfd);
/* only "shutdown" here. this triggers the select, where the socket is
"closed" in the mainloop */
shutdown(connection->sockfd, 2);
}
/* Example 3 */
static UA_StatusCode
fooBarMethod(void *handle, const UA_NodeId objectId,
size_t inputSize, const UA_Variant *input,
size_t outputSize, UA_Variant *output) {
/* the same as helloWorld, but returns foobar */
UA_String *inputStr = (UA_String*)input->data;
UA_String tmp = UA_STRING_ALLOC("FooBar! ");
if(inputStr->length > 0) {
tmp.data = realloc(tmp.data, tmp.length + inputStr->length);
memcpy(&tmp.data[tmp.length], inputStr->data, inputStr->length);
tmp.length += inputStr->length;
}
UA_Variant_setScalarCopy(output, &tmp, &UA_TYPES[UA_TYPES_STRING]);
UA_String_deleteMembers(&tmp);
UA_LOG_INFO(logger, UA_LOGCATEGORY_SERVER, "FooBar was called");
return UA_STATUSCODE_GOOD;
}
/**
* Called in processCompleteChunk for every complete chunk which is received by the server.
*
* It will first try to decode the message to get the name of the called service.
* When we have a name the message is dumped as binary to that file.
* If the file already exists a new file will be created with a counter at the end.
*/
void
UA_debug_dumpCompleteChunk(UA_Server *const server, UA_Connection *const connection,
UA_ByteString *messageBuffer) {
struct UA_dump_filename dump_filename;
dump_filename.messageType = NULL;
dump_filename.serviceName[0] = 0;
if(!connection->channel) {
UA_debug_dump_setName_withoutChannel(server, connection, messageBuffer, &dump_filename);
} else {
UA_SecureChannel dummy = *connection->channel;
TAILQ_INIT(&dummy.messages);
UA_ByteString messageBufferCopy;
UA_ByteString_copy(messageBuffer, &messageBufferCopy);
UA_SecureChannel_decryptAddChunk(&dummy, &messageBufferCopy, UA_TRUE);
UA_SecureChannel_processCompleteMessages(&dummy, &dump_filename, UA_debug_dump_setName_withChannel);
UA_SecureChannel_deleteMessages(&dummy);
UA_ByteString_deleteMembers(&messageBufferCopy);
}
char fileName[250];
snprintf(fileName, 255, "%s/%05d_%s%s", UA_CORPUS_OUTPUT_DIR, ++UA_dump_chunkCount,
dump_filename.messageType ? dump_filename.messageType : "", dump_filename.serviceName);
char dumpOutputFile[255];
snprintf(dumpOutputFile, 255, "%s.bin", fileName);
// check if file exists and if yes create a counting filename to avoid overwriting
unsigned cnt = 1;
while ( access( dumpOutputFile, F_OK ) != -1 ) {
snprintf(dumpOutputFile, 255, "%s_%d.bin", fileName, cnt);
cnt++;
}
UA_LOG_INFO(&server->config.logger, UA_LOGCATEGORY_SERVER,
"Dumping package %s", dumpOutputFile);
FILE *write_ptr = fopen(dumpOutputFile, "ab");
fwrite(messageBuffer->data, messageBuffer->length, 1, write_ptr); // write 10 bytes from our buffer
// add the available memory size. See the UA_DUMP_RAM_SIZE define for more info.
uint32_t ramSize = UA_DUMP_RAM_SIZE;
fwrite(&ramSize, sizeof(ramSize), 1, write_ptr);
fclose(write_ptr);
}
static UA_StatusCode
sendHELMessage(UA_Client *client) {
/* Get a buffer */
UA_ByteString message;
UA_Connection *conn = &client->connection;
UA_StatusCode retval = conn->getSendBuffer(conn, UA_MINMESSAGESIZE, &message);
if(retval != UA_STATUSCODE_GOOD)
return retval;
/* Prepare the HEL message and encode at offset 8 */
UA_TcpHelloMessage hello;
UA_String_copy(&client->endpointUrl, &hello.endpointUrl); /* must be less than 4096 bytes */
memcpy(&hello, &client->config.localConnectionConfig,
sizeof(UA_ConnectionConfig)); /* same struct layout */
UA_Byte *bufPos = &message.data[8]; /* skip the header */
const UA_Byte *bufEnd = &message.data[message.length];
client->connectStatus = UA_TcpHelloMessage_encodeBinary(&hello, &bufPos, bufEnd);
UA_TcpHelloMessage_deleteMembers (&hello);
/* Encode the message header at offset 0 */
UA_TcpMessageHeader messageHeader;
messageHeader.messageTypeAndChunkType = UA_CHUNKTYPE_FINAL + UA_MESSAGETYPE_HEL;
messageHeader.messageSize = (UA_UInt32) ((uintptr_t)bufPos - (uintptr_t)message.data);
bufPos = message.data;
retval = UA_TcpMessageHeader_encodeBinary(&messageHeader, &bufPos, bufEnd);
if(retval != UA_STATUSCODE_GOOD) {
conn->releaseSendBuffer(conn, &message);
return retval;
}
/* Send the HEL message */
message.length = messageHeader.messageSize;
retval = conn->send (conn, &message);
if(retval == UA_STATUSCODE_GOOD) {
UA_LOG_DEBUG(&client->config.logger, UA_LOGCATEGORY_NETWORK, "Sent HEL message");
} else {
UA_LOG_INFO(&client->config.logger, UA_LOGCATEGORY_NETWORK, "Sending HEL failed");
}
return retval;
}
int main(int argc, char** argv) {
signal(SIGINT, stopHandler); /* catches ctrl-c */
UA_ServerConfig *config = UA_ServerConfig_new_default();
/* load certificate */
config->serverCertificate = loadFile("server_cert.der");
if(config->serverCertificate.length > 0)
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "Certificate loaded");
UA_Server *server = UA_Server_new(config);
UA_StatusCode retval = UA_Server_run(server, &running);
/* deallocate certificate's memory */
UA_ByteString_clear(&config->serverCertificate);
UA_Server_delete(server);
UA_ServerConfig_delete(config);
return retval == UA_STATUSCODE_GOOD ? EXIT_SUCCESS : EXIT_FAILURE;
}
static UA_StatusCode
pumpTypeConstructor(UA_Server *server,
const UA_NodeId *sessionId, void *sessionContext,
const UA_NodeId *typeId, void *typeContext,
const UA_NodeId *nodeId, void **nodeContext) {
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "New pump created");
/* Find the NodeId of the status child variable */
UA_RelativePathElement rpe;
UA_RelativePathElement_init(&rpe);
rpe.referenceTypeId = UA_NODEID_NUMERIC(0, UA_NS0ID_HASCOMPONENT);
rpe.isInverse = false;
rpe.includeSubtypes = false;
rpe.targetName = UA_QUALIFIEDNAME(1, "Status");
UA_BrowsePath bp;
UA_BrowsePath_init(&bp);
bp.startingNode = *nodeId;
bp.relativePath.elementsSize = 1;
bp.relativePath.elements = &rpe;
UA_BrowsePathResult bpr =
UA_Server_translateBrowsePathToNodeIds(server, &bp);
if(bpr.statusCode != UA_STATUSCODE_GOOD ||
bpr.targetsSize < 1)
return bpr.statusCode;
/* Set the status value */
UA_Boolean status = true;
UA_Variant value;
UA_Variant_setScalar(&value, &status, &UA_TYPES[UA_TYPES_BOOLEAN]);
UA_Server_writeValue(server, bpr.targets[0].targetId.nodeId, value);
UA_BrowsePathResult_clear(&bpr);
/* At this point we could replace the node context .. */
return UA_STATUSCODE_GOOD;
}
static size_t
ServerNetworkLayerTCP_stop(ServerNetworkLayerTCP *layer, UA_Job **jobs) {
UA_LOG_INFO(layer->layer.logger, UA_LOGCATEGORY_NETWORK,
"Shutting down the TCP network layer with %d open connection(s)", layer->mappingsSize);
shutdown(layer->serversockfd,2);
CLOSESOCKET(layer->serversockfd);
UA_Job *items = malloc(sizeof(UA_Job) * layer->mappingsSize * 2);
if(!items)
return 0;
for(size_t i = 0; i < layer->mappingsSize; i++) {
socket_close(layer->mappings[i].connection);
items[i*2].type = UA_JOBTYPE_DETACHCONNECTION;
items[i*2].job.closeConnection = layer->mappings[i].connection;
items[(i*2)+1].type = UA_JOBTYPE_METHODCALL_DELAYED;
items[(i*2)+1].job.methodCall.method = FreeConnectionCallback;
items[(i*2)+1].job.methodCall.data = layer->mappings[i].connection;
}
#ifdef _WIN32
WSACleanup();
#endif
*jobs = items;
return layer->mappingsSize*2;
}
static UA_StatusCode
ServerNetworkLayerTCP_start(UA_ServerNetworkLayer *nl) {
ServerNetworkLayerTCP *layer = nl->handle;
#ifdef _WIN32
if((layer->serversockfd = socket(PF_INET, SOCK_STREAM,0)) == (UA_Int32)INVALID_SOCKET) {
UA_LOG_WARNING(layer->logger, UA_LOGCATEGORY_NETWORK, "Error opening socket, code: %d",
WSAGetLastError());
return UA_STATUSCODE_BADINTERNALERROR;
}
#else
if((layer->serversockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
UA_LOG_WARNING(layer->logger, UA_LOGCATEGORY_NETWORK, "Error opening socket");
return UA_STATUSCODE_BADINTERNALERROR;
}
#endif
const struct sockaddr_in serv_addr =
{.sin_family = AF_INET, .sin_addr.s_addr = INADDR_ANY,
.sin_port = htons(layer->port), .sin_zero = {0}};
int optval = 1;
if(setsockopt(layer->serversockfd, SOL_SOCKET,
SO_REUSEADDR, (const char *)&optval, sizeof(optval)) == -1) {
UA_LOG_WARNING(layer->logger, UA_LOGCATEGORY_NETWORK,
"Error during setting of socket options");
CLOSESOCKET(layer->serversockfd);
return UA_STATUSCODE_BADINTERNALERROR;
}
if(bind(layer->serversockfd, (const struct sockaddr *)&serv_addr,
sizeof(serv_addr)) < 0) {
UA_LOG_WARNING(layer->logger, UA_LOGCATEGORY_NETWORK, "Error during socket binding");
CLOSESOCKET(layer->serversockfd);
return UA_STATUSCODE_BADINTERNALERROR;
}
socket_set_nonblocking(layer->serversockfd);
listen(layer->serversockfd, MAXBACKLOG);
UA_LOG_INFO(layer->logger, UA_LOGCATEGORY_NETWORK, "TCP network layer listening on %.*s",
nl->discoveryUrl.length, nl->discoveryUrl.data);
return UA_STATUSCODE_GOOD;
}
static size_t
ServerNetworkLayerTCP_getJobs(UA_ServerNetworkLayer *nl, UA_Job **jobs, UA_UInt16 timeout) {
ServerNetworkLayerTCP *layer = nl->handle;
fd_set fdset;
UA_Int32 highestfd = setFDSet(layer, &fdset);
struct timeval tmptv = {0, timeout};
UA_Int32 resultsize;
resultsize = select(highestfd+1, &fdset, NULL, NULL, &tmptv);
if(resultsize < 0) {
*jobs = NULL;
return 0;
}
/* accept new connections (can only be a single one) */
if(FD_ISSET(layer->serversockfd, &fdset)) {
resultsize--;
struct sockaddr_in cli_addr;
socklen_t cli_len = sizeof(cli_addr);
int newsockfd = accept(layer->serversockfd, (struct sockaddr *) &cli_addr, &cli_len);
int i = 1;
setsockopt(newsockfd, IPPROTO_TCP, TCP_NODELAY, (void *)&i, sizeof(i));
if(newsockfd >= 0) {
socket_set_nonblocking(newsockfd);
ServerNetworkLayerTCP_add(layer, newsockfd);
}
}
/* alloc enough space for a cleanup-connection and free-connection job per resulted socket */
if(resultsize == 0)
return 0;
UA_Job *js = malloc(sizeof(UA_Job) * resultsize * 2);
if(!js)
return 0;
/* read from established sockets */
size_t j = 0;
UA_ByteString buf = UA_BYTESTRING_NULL;
for(size_t i = 0; i < layer->mappingsSize && j < (size_t)resultsize; i++) {
if(!(FD_ISSET(layer->mappings[i].sockfd, &fdset)))
continue;
UA_StatusCode retval = socket_recv(layer->mappings[i].connection, &buf, 0);
if(retval == UA_STATUSCODE_GOOD) {
UA_Boolean realloced = UA_FALSE;
retval = UA_Connection_completeMessages(layer->mappings[i].connection, &buf, &realloced);
if(retval != UA_STATUSCODE_GOOD || buf.length == 0)
continue;
js[j].job.binaryMessage.connection = layer->mappings[i].connection;
js[j].job.binaryMessage.message = buf;
if(!realloced)
js[j].type = UA_JOBTYPE_BINARYMESSAGE_NETWORKLAYER;
else
js[j].type = UA_JOBTYPE_BINARYMESSAGE_ALLOCATED;
j++;
} else if (retval == UA_STATUSCODE_BADCONNECTIONCLOSED) {
UA_Connection *c = layer->mappings[i].connection;
/* the socket was closed from remote */
js[j].type = UA_JOBTYPE_DETACHCONNECTION;
js[j].job.closeConnection = layer->mappings[i].connection;
layer->mappings[i] = layer->mappings[layer->mappingsSize-1];
layer->mappingsSize--;
j++;
js[j].type = UA_JOBTYPE_METHODCALL_DELAYED;
js[j].job.methodCall.method = FreeConnectionCallback;
js[j].job.methodCall.data = c;
j++;
}
}
if(j == 0) {
free(js);
js = NULL;
}
*jobs = js;
return j;
}
static void stopHandler(int sign) {
UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "received ctrl-c");
running = false;
}
