/* The request/response are casted to the header (first element of their struct) */
static void invoke_service(UA_Server *server, UA_SecureChannel *channel,
UA_UInt32 requestId, UA_RequestHeader *request, const UA_DataType *responseType,
void (*service)(UA_Server*, UA_Session*, void*, void*)) {
UA_ResponseHeader *response = UA_alloca(responseType->memSize);
UA_init(response, responseType);
init_response_header(request, response);
/* try to get the session from the securechannel first */
UA_Session *session = UA_SecureChannel_getSession(channel, &request->authenticationToken);
if(!session)
session = UA_SessionManager_getSession(&server->sessionManager, &request->authenticationToken);
if(!session)
response->serviceResult = UA_STATUSCODE_BADSESSIONIDINVALID;
else if(session->activated == UA_FALSE) {
response->serviceResult = UA_STATUSCODE_BADSESSIONNOTACTIVATED;
/* the session is invalidated FIXME: do this delayed*/
UA_SessionManager_removeSession(&server->sessionManager, &request->authenticationToken);
} else if(session->channel != channel) {
response->serviceResult = UA_STATUSCODE_BADSESSIONIDINVALID;
} else {
UA_Session_updateLifetime(session);
service(server, session, request, response);
}
UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType);
UA_deleteMembers(response, responseType);
}
static void
sendError(UA_SecureChannel *channel, const UA_ByteString *msg,
size_t offset, const UA_DataType *responseType,
UA_UInt32 requestId, UA_StatusCode error) {
UA_RequestHeader requestHeader;
UA_StatusCode retval = UA_RequestHeader_decodeBinary(msg, &offset, &requestHeader);
if(retval != UA_STATUSCODE_GOOD)
return;
void *response = UA_alloca(responseType->memSize);
UA_init(response, responseType);
UA_ResponseHeader *responseHeader = (UA_ResponseHeader*)response;
responseHeader->requestHandle = requestHeader.requestHandle;
responseHeader->timestamp = UA_DateTime_now();
responseHeader->serviceResult = error;
UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType);
UA_RequestHeader_deleteMembers(&requestHeader);
UA_ResponseHeader_deleteMembers(responseHeader);
}
static void
variables_basic(void) {
/* Int32 */
UA_Int32 i = 5;
UA_Int32 j;
UA_Int32_copy(&i, &j);
UA_Int32 *ip = UA_Int32_new();
UA_Int32_copy(&i, ip);
UA_Int32_delete(ip);
/* String */
UA_String s;
UA_String_init(&s); /* _init zeroes out the entire memory of the datatype */
char *test = "test";
s.length = strlen(test);
s.data = (UA_Byte*)test;
UA_String s2;
UA_String_copy(&s, &s2);
UA_String_deleteMembers(&s2); /* Copying heap-allocated the dynamic content */
UA_String s3 = UA_STRING("test2");
UA_String s4 = UA_STRING_ALLOC("test2"); /* Copies the content to the heap */
UA_Boolean eq = UA_String_equal(&s3, &s4);
UA_String_deleteMembers(&s4);
if(!eq)
return;
/* Structured Type */
UA_ReadRequest rr;
UA_init(&rr, &UA_TYPES[UA_TYPES_READREQUEST]); /* Generic method */
UA_ReadRequest_init(&rr); /* Shorthand for the previous line */
rr.requestHeader.timestamp = UA_DateTime_now(); /* Members of a structure */
rr.nodesToRead = (UA_ReadValueId *)UA_Array_new(5, &UA_TYPES[UA_TYPES_READVALUEID]);
rr.nodesToReadSize = 5; /* Array size needs to be made known */
UA_ReadRequest *rr2 = UA_ReadRequest_new();
UA_copy(&rr, rr2, &UA_TYPES[UA_TYPES_READREQUEST]);
UA_ReadRequest_deleteMembers(&rr);
UA_ReadRequest_delete(rr2);
}
/* The request/response are casted to the header (first element of their struct) */
static void invoke_service(UA_Server *server, UA_SecureChannel *channel, UA_UInt32 requestId,
UA_RequestHeader *request, const UA_DataType *responseType,
void (*service)(UA_Server*, UA_Session*, void*, void*)) {
UA_ResponseHeader *response = UA_alloca(responseType->memSize);
UA_init(response, responseType);
init_response_header(request, response);
/* try to get the session from the securechannel first */
UA_Session *session = UA_SecureChannel_getSession(channel, &request->authenticationToken);
#ifdef EXTENSION_STATELESS
if(request->authenticationToken.namespaceIndex == 0
&& request->authenticationToken.identifierType == UA_NODEIDTYPE_NUMERIC
&& request->authenticationToken.identifier.numeric == 0
&& (responseType->typeIndex == UA_TYPES_READRESPONSE
|| responseType->typeIndex == UA_TYPES_WRITERESPONSE
|| responseType->typeIndex == UA_TYPES_BROWSERESPONSE)
){
session = &anonymousSession;
service(server, session, request, response);
}else{
#endif
if(!session || session->channel != channel) {
response->serviceResult = UA_STATUSCODE_BADSESSIONIDINVALID;
} else if(session->activated == UA_FALSE) {
response->serviceResult = UA_STATUSCODE_BADSESSIONNOTACTIVATED;
/* /\* the session is invalidated FIXME: do this delayed*\/ */
/* UA_SessionManager_removeSession(&server->sessionManager, server, &request->authenticationToken); */
} else {
UA_Session_updateLifetime(session);
service(server, session, request, response);
}
#ifdef EXTENSION_STATELESS
}
#endif
UA_StatusCode retval = UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType);
if(retval != UA_STATUSCODE_GOOD) {
if(retval == UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED)
response->serviceResult = UA_STATUSCODE_BADRESPONSETOOLARGE;
else
response->serviceResult = retval;
UA_SecureChannel_sendBinaryMessage(channel, requestId, response, &UA_TYPES[UA_TYPES_SERVICEFAULT]);
}
UA_deleteMembers(response, responseType);
}
void __UA_Client_Service(UA_Client *client, const void *r, const UA_DataType *requestType,
void *response, const UA_DataType *responseType) {
/* Requests always begin witih a RequestHeader, therefore we can cast. */
UA_RequestHeader *request = (void*)(uintptr_t)r;
UA_StatusCode retval = UA_STATUSCODE_GOOD;
UA_init(response, responseType);
UA_ResponseHeader *respHeader = (UA_ResponseHeader*)response;
/* make sure we have a valid session */
retval = UA_Client_manuallyRenewSecureChannel(client);
if(retval != UA_STATUSCODE_GOOD) {
respHeader->serviceResult = retval;
client->state = UA_CLIENTSTATE_ERRORED;
return;
}
/* handling request parameters */
UA_NodeId_copy(&client->authenticationToken, &request->authenticationToken);
request->timestamp = UA_DateTime_now();
request->requestHandle = ++client->requestHandle;
/* Send the request */
UA_UInt32 requestId = ++client->requestId;
UA_LOG_DEBUG(client->logger, UA_LOGCATEGORY_CLIENT,
"Sending a request of type %i", requestType->typeId.identifier.numeric);
retval = UA_SecureChannel_sendBinaryMessage(&client->channel, requestId, request, requestType);
if(retval) {
if(retval == UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED)
respHeader->serviceResult = UA_STATUSCODE_BADREQUESTTOOLARGE;
else
respHeader->serviceResult = retval;
client->state = UA_CLIENTSTATE_ERRORED;
return;
}
/* Retrieve the response */
// Todo: push this into the generic securechannel implementation for client and server
UA_ByteString reply;
UA_ByteString_init(&reply);
do {
retval = client->connection.recv(&client->connection, &reply, client->config.timeout);
if(retval != UA_STATUSCODE_GOOD) {
respHeader->serviceResult = retval;
client->state = UA_CLIENTSTATE_ERRORED;
return;
}
} while(!reply.data);
size_t offset = 0;
UA_SecureConversationMessageHeader msgHeader;
retval |= UA_SecureConversationMessageHeader_decodeBinary(&reply, &offset, &msgHeader);
UA_SymmetricAlgorithmSecurityHeader symHeader;
retval |= UA_SymmetricAlgorithmSecurityHeader_decodeBinary(&reply, &offset, &symHeader);
UA_SequenceHeader seqHeader;
retval |= UA_SequenceHeader_decodeBinary(&reply, &offset, &seqHeader);
UA_NodeId responseId;
retval |= UA_NodeId_decodeBinary(&reply, &offset, &responseId);
UA_NodeId expectedNodeId = UA_NODEID_NUMERIC(0, responseType->typeId.identifier.numeric +
UA_ENCODINGOFFSET_BINARY);
if(retval != UA_STATUSCODE_GOOD) {
goto finish;
}
/* Todo: we need to demux responses since a publish responses may come at any time */
if(!UA_NodeId_equal(&responseId, &expectedNodeId) || seqHeader.requestId != requestId) {
if(responseId.identifier.numeric != UA_NS0ID_SERVICEFAULT + UA_ENCODINGOFFSET_BINARY) {
UA_LOG_ERROR(client->logger, UA_LOGCATEGORY_CLIENT,
"Reply answers the wrong request. Expected ns=%i,i=%i. But retrieved ns=%i,i=%i",
expectedNodeId.namespaceIndex, expectedNodeId.identifier.numeric,
responseId.namespaceIndex, responseId.identifier.numeric);
respHeader->serviceResult = UA_STATUSCODE_BADINTERNALERROR;
} else
retval = UA_decodeBinary(&reply, &offset, respHeader, &UA_TYPES[UA_TYPES_SERVICEFAULT]);
goto finish;
}
retval = UA_decodeBinary(&reply, &offset, response, responseType);
if(retval == UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED)
retval = UA_STATUSCODE_BADRESPONSETOOLARGE;
finish:
UA_SymmetricAlgorithmSecurityHeader_deleteMembers(&symHeader);
UA_ByteString_deleteMembers(&reply);
if(retval != UA_STATUSCODE_GOOD){
UA_LOG_INFO(client->logger, UA_LOGCATEGORY_CLIENT, "Error receiving the response");
client->state = UA_CLIENTSTATE_ERRORED;
respHeader->serviceResult = retval;
}
UA_LOG_DEBUG(client->logger, UA_LOGCATEGORY_CLIENT,
"Received a response of type %i", responseId.identifier.numeric);
}
static void
processMSG(UA_Server *server, UA_SecureChannel *channel,
UA_UInt32 requestId, const UA_ByteString *msg) {
/* At 0, the nodeid starts... */
size_t ppos = 0;
size_t *offset = &ppos;
/* Decode the nodeid */
UA_NodeId requestTypeId;
UA_StatusCode retval = UA_NodeId_decodeBinary(msg, offset, &requestTypeId);
if(retval != UA_STATUSCODE_GOOD)
return;
if(requestTypeId.identifierType != UA_NODEIDTYPE_NUMERIC)
UA_NodeId_deleteMembers(&requestTypeId); /* leads to badserviceunsupported */
/* Store the start-position of the request */
size_t requestPos = *offset;
/* Get the service pointers */
UA_Service service = NULL;
const UA_DataType *requestType = NULL;
const UA_DataType *responseType = NULL;
UA_Boolean sessionRequired = true;
getServicePointers(requestTypeId.identifier.numeric, &requestType,
&responseType, &service, &sessionRequired);
if(!requestType) {
if(requestTypeId.identifier.numeric == 787) {
UA_LOG_INFO_CHANNEL(server->config.logger, channel,
"Client requested a subscription, " \
"but those are not enabled in the build");
} else {
UA_LOG_INFO_CHANNEL(server->config.logger, channel, "Unknown request %i",
requestTypeId.identifier.numeric);
}
sendError(channel, msg, requestPos, &UA_TYPES[UA_TYPES_SERVICEFAULT],
requestId, UA_STATUSCODE_BADSERVICEUNSUPPORTED);
return;
}
UA_assert(responseType);
#ifdef UA_ENABLE_NONSTANDARD_STATELESS
/* Stateless extension: Sessions are optional */
sessionRequired = false;
#endif
/* Decode the request */
void *request = UA_alloca(requestType->memSize);
UA_RequestHeader *requestHeader = (UA_RequestHeader*)request;
retval = UA_decodeBinary(msg, offset, request, requestType);
if(retval != UA_STATUSCODE_GOOD) {
UA_LOG_DEBUG_CHANNEL(server->config.logger, channel, "Could not decode the request");
sendError(channel, msg, requestPos, responseType, requestId, retval);
return;
}
/* Prepare the respone */
void *response = UA_alloca(responseType->memSize);
UA_init(response, responseType);
UA_Session *session = NULL; /* must be initialized before goto send_response */
/* CreateSession doesn't need a session */
if(requestType == &UA_TYPES[UA_TYPES_CREATESESSIONREQUEST]) {
Service_CreateSession(server, channel, request, response);
goto send_response;
}
/* Find the matching session */
session = UA_SecureChannel_getSession(channel, &requestHeader->authenticationToken);
if(!session)
session = UA_SessionManager_getSession(&server->sessionManager,
&requestHeader->authenticationToken);
if(requestType == &UA_TYPES[UA_TYPES_ACTIVATESESSIONREQUEST]) {
if(!session) {
UA_LOG_DEBUG_CHANNEL(server->config.logger, channel,
"Trying to activate a session that is " \
"not known in the server");
sendError(channel, msg, requestPos, responseType,
requestId, UA_STATUSCODE_BADSESSIONIDINVALID);
UA_deleteMembers(request, requestType);
return;
}
Service_ActivateSession(server, channel, session, request, response);
goto send_response;
}
/* Set an anonymous, inactive session for services that need no session */
UA_Session anonymousSession;
if(!session) {
if(sessionRequired) {
UA_LOG_INFO_CHANNEL(server->config.logger, channel,
"Service request %i without a valid session",
requestType->binaryEncodingId);
sendError(channel, msg, requestPos, responseType,
requestId, UA_STATUSCODE_BADSESSIONIDINVALID);
UA_deleteMembers(request, requestType);
return;
}
UA_Session_init(&anonymousSession);
anonymousSession.sessionId = UA_NODEID_GUID(0, UA_GUID_NULL);
anonymousSession.channel = channel;
session = &anonymousSession;
}
/* Trying to use a non-activated session? */
if(sessionRequired && !session->activated) {
UA_LOG_INFO_SESSION(server->config.logger, session,
"Calling service %i on a non-activated session",
requestType->binaryEncodingId);
sendError(channel, msg, requestPos, responseType,
requestId, UA_STATUSCODE_BADSESSIONNOTACTIVATED);
UA_SessionManager_removeSession(&server->sessionManager,
&session->authenticationToken);
UA_deleteMembers(request, requestType);
return;
}
/* The session is bound to another channel */
if(session->channel != channel) {
UA_LOG_DEBUG_CHANNEL(server->config.logger, channel,
"Client tries to use an obsolete securechannel");
sendError(channel, msg, requestPos, responseType,
requestId, UA_STATUSCODE_BADSECURECHANNELIDINVALID);
UA_deleteMembers(request, requestType);
return;
}
/* Update the session lifetime */
UA_Session_updateLifetime(session);
#ifdef UA_ENABLE_SUBSCRIPTIONS
/* The publish request is not answered immediately */
if(requestType == &UA_TYPES[UA_TYPES_PUBLISHREQUEST]) {
Service_Publish(server, session, request, requestId);
UA_deleteMembers(request, requestType);
return;
}
#endif
/* Call the service */
UA_assert(service); /* For all services besides publish, the service pointer is non-NULL*/
service(server, session, request, response);
send_response:
/* Send the response */
((UA_ResponseHeader*)response)->requestHandle = requestHeader->requestHandle;
((UA_ResponseHeader*)response)->timestamp = UA_DateTime_now();
retval = UA_SecureChannel_sendBinaryMessage(channel, requestId, response, responseType);
if(retval != UA_STATUSCODE_GOOD)
UA_LOG_INFO_CHANNEL(server->config.logger, channel, "Could not send the message over "
"the SecureChannel with error code 0x%08x", retval);
/* Clean up */
UA_deleteMembers(request, requestType);
UA_deleteMembers(response, responseType);
}
static void
processMSG(UA_Connection *connection, UA_Server *server, const UA_ByteString *msg, size_t *pos) {
/* If we cannot decode these, don't respond */
UA_UInt32 secureChannelId = 0;
UA_UInt32 tokenId = 0;
UA_SequenceHeader sequenceHeader;
UA_NodeId requestTypeId;
UA_StatusCode retval = UA_UInt32_decodeBinary(msg, pos, &secureChannelId);
retval |= UA_UInt32_decodeBinary(msg, pos, &tokenId);
retval |= UA_SequenceHeader_decodeBinary(msg, pos, &sequenceHeader);
retval = UA_NodeId_decodeBinary(msg, pos, &requestTypeId);
if(retval != UA_STATUSCODE_GOOD)
return;
UA_SecureChannel *channel = connection->channel;
UA_SecureChannel anonymousChannel;
if(!channel) {
UA_SecureChannel_init(&anonymousChannel);
anonymousChannel.connection = connection;
channel = &anonymousChannel;
}
/* Test if the secure channel is ok */
if(secureChannelId != channel->securityToken.channelId)
return;
if(tokenId != channel->securityToken.tokenId) {
if(tokenId != channel->nextSecurityToken.tokenId) {
/* close the securechannel but keep the connection open */
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SECURECHANNEL,
"Request with a wrong security token. Closing the SecureChannel %i.",
channel->securityToken.channelId);
Service_CloseSecureChannel(server, channel->securityToken.channelId);
return;
}
UA_SecureChannel_revolveTokens(channel);
}
/* Test if the service type nodeid has the right format */
if(requestTypeId.identifierType != UA_NODEIDTYPE_NUMERIC ||
requestTypeId.namespaceIndex != 0) {
UA_NodeId_deleteMembers(&requestTypeId);
sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSERVICEUNSUPPORTED);
return;
}
/* Get the service pointers */
UA_Service service = NULL;
const UA_DataType *requestType = NULL;
const UA_DataType *responseType = NULL;
getServicePointers(requestTypeId.identifier.numeric, &requestType, &responseType, &service);
if(!service) {
/* The service is not supported */
if(requestTypeId.identifier.numeric==787)
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER,
"Client requested a subscription that are not supported, "
"the message will be skipped");
else
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER, "Unknown request: NodeId(ns=%d, i=%d)",
requestTypeId.namespaceIndex, requestTypeId.identifier.numeric);
sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSERVICEUNSUPPORTED);
return;
}
/* Most services can only be called with a valid securechannel */
#ifndef EXTENSION_STATELESS
if(channel == &anonymousChannel &&
requestType->typeIndex > UA_TYPES_OPENSECURECHANNELREQUEST) {
sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSECURECHANNELIDINVALID);
return;
}
#endif
/* Decode the request */
void *request = UA_alloca(requestType->memSize);
size_t oldpos = *pos;
retval = UA_decodeBinary(msg, pos, request, requestType);
if(retval != UA_STATUSCODE_GOOD) {
sendError(channel, msg, oldpos, sequenceHeader.requestId, retval);
return;
}
/* Find the matching session */
UA_Session *session =
UA_SecureChannel_getSession(channel, &((UA_RequestHeader*)request)->authenticationToken);
UA_Session anonymousSession;
if(!session) {
UA_Session_init(&anonymousSession);
anonymousSession.channel = channel;
anonymousSession.activated = UA_TRUE;
session = &anonymousSession;
}
/* Test if the session is valid */
if(!session->activated && requestType->typeIndex != UA_TYPES_ACTIVATESESSIONREQUEST) {
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER, "Client tries to call a service with a non-activated session");
sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSESSIONNOTACTIVATED);
return;
}
#ifndef EXTENSION_STATELESS
if(session == &anonymousSession &&
requestType->typeIndex > UA_TYPES_ACTIVATESESSIONREQUEST) {
UA_LOG_INFO(server->logger, UA_LOGCATEGORY_SERVER, "Client tries to call a service without a session");
sendError(channel, msg, *pos, sequenceHeader.requestId, UA_STATUSCODE_BADSESSIONIDINVALID);
return;
}
#endif
/* Call the service */
UA_Session_updateLifetime(session);
void *response = UA_alloca(responseType->memSize);
UA_init(response, responseType);
init_response_header(request, response);
service(server, session, request, response);
/* Send the response */
retval = UA_SecureChannel_sendBinaryMessage(channel, sequenceHeader.requestId,
response, responseType);
if(retval != UA_STATUSCODE_GOOD) {
/* e.g. UA_STATUSCODE_BADENCODINGLIMITSEXCEEDED */
sendError(channel, msg, oldpos, sequenceHeader.requestId, retval);
}
/* Clean up */
UA_deleteMembers(request, requestType);
UA_deleteMembers(response, responseType);
return;
}
