/* 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);
}
/* 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);
}
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 UA_StatusCode
CopyAttributeIntoNode(UA_Server *server, UA_Session *session,
UA_Node *node, const UA_WriteValue *wvalue) {
if(!wvalue->value.hasValue)
return UA_STATUSCODE_BADNODATA;
void *value = wvalue->value.value.data;
void *target = NULL;
const UA_DataType *type = NULL;
UA_StatusCode retval = UA_STATUSCODE_GOOD;
switch(wvalue->attributeId) {
case UA_ATTRIBUTEID_NODEID:
case UA_ATTRIBUTEID_NODECLASS:
case UA_ATTRIBUTEID_DATATYPE:
retval = UA_STATUSCODE_BADWRITENOTSUPPORTED;
break;
case UA_ATTRIBUTEID_BROWSENAME:
CHECK_DATATYPE(QUALIFIEDNAME);
target = &node->browseName;
type = &UA_TYPES[UA_TYPES_QUALIFIEDNAME];
break;
case UA_ATTRIBUTEID_DISPLAYNAME:
CHECK_DATATYPE(LOCALIZEDTEXT);
target = &node->displayName;
type = &UA_TYPES[UA_TYPES_LOCALIZEDTEXT];
break;
case UA_ATTRIBUTEID_DESCRIPTION:
CHECK_DATATYPE(LOCALIZEDTEXT);
target = &node->description;
type = &UA_TYPES[UA_TYPES_LOCALIZEDTEXT];
break;
case UA_ATTRIBUTEID_WRITEMASK:
CHECK_DATATYPE(UINT32);
node->writeMask = *(UA_UInt32*)value;
break;
case UA_ATTRIBUTEID_USERWRITEMASK:
CHECK_DATATYPE(UINT32);
node->userWriteMask = *(UA_UInt32*)value;
break;
case UA_ATTRIBUTEID_ISABSTRACT:
CHECK_NODECLASS_WRITE(UA_NODECLASS_OBJECTTYPE | UA_NODECLASS_REFERENCETYPE |
UA_NODECLASS_VARIABLETYPE | UA_NODECLASS_DATATYPE);
CHECK_DATATYPE(BOOLEAN);
((UA_ObjectTypeNode*)node)->isAbstract = *(UA_Boolean*)value;
break;
case UA_ATTRIBUTEID_SYMMETRIC:
CHECK_NODECLASS_WRITE(UA_NODECLASS_REFERENCETYPE);
CHECK_DATATYPE(BOOLEAN);
((UA_ReferenceTypeNode*)node)->symmetric = *(UA_Boolean*)value;
break;
case UA_ATTRIBUTEID_INVERSENAME:
CHECK_NODECLASS_WRITE(UA_NODECLASS_REFERENCETYPE);
CHECK_DATATYPE(LOCALIZEDTEXT);
target = &((UA_ReferenceTypeNode*)node)->inverseName;
type = &UA_TYPES[UA_TYPES_LOCALIZEDTEXT];
break;
case UA_ATTRIBUTEID_CONTAINSNOLOOPS:
CHECK_NODECLASS_WRITE(UA_NODECLASS_VIEW);
CHECK_DATATYPE(BOOLEAN);
((UA_ViewNode*)node)->containsNoLoops = *(UA_Boolean*)value;
break;
case UA_ATTRIBUTEID_EVENTNOTIFIER:
CHECK_NODECLASS_WRITE(UA_NODECLASS_VIEW | UA_NODECLASS_OBJECT);
CHECK_DATATYPE(BYTE);
((UA_ViewNode*)node)->eventNotifier = *(UA_Byte*)value;
break;
case UA_ATTRIBUTEID_VALUE:
CHECK_NODECLASS_WRITE(UA_NODECLASS_VARIABLE | UA_NODECLASS_VARIABLETYPE);
if(((const UA_VariableNode*)node)->valueSource == UA_VALUESOURCE_VARIANT)
retval = CopyValueIntoNode((UA_VariableNode*)node, wvalue);
else
retval = Service_Write_single_ValueDataSource(server, session, (const UA_VariableNode*)node, wvalue);
break;
case UA_ATTRIBUTEID_ACCESSLEVEL:
CHECK_NODECLASS_WRITE(UA_NODECLASS_VARIABLE);
CHECK_DATATYPE(BYTE);
((UA_VariableNode*)node)->accessLevel = *(UA_Byte*)value;
break;
case UA_ATTRIBUTEID_USERACCESSLEVEL:
CHECK_NODECLASS_WRITE(UA_NODECLASS_VARIABLE);
CHECK_DATATYPE(BYTE);
((UA_VariableNode*)node)->userAccessLevel = *(UA_Byte*)value;
break;
case UA_ATTRIBUTEID_MINIMUMSAMPLINGINTERVAL:
CHECK_NODECLASS_WRITE(UA_NODECLASS_VARIABLE);
CHECK_DATATYPE(DOUBLE);
((UA_VariableNode*)node)->minimumSamplingInterval = *(UA_Double*)value;
break;
case UA_ATTRIBUTEID_HISTORIZING:
CHECK_NODECLASS_WRITE(UA_NODECLASS_VARIABLE);
CHECK_DATATYPE(BOOLEAN);
((UA_VariableNode*)node)->historizing = *(UA_Boolean*)value;
break;
case UA_ATTRIBUTEID_EXECUTABLE:
CHECK_NODECLASS_WRITE(UA_NODECLASS_METHOD);
CHECK_DATATYPE(BOOLEAN);
((UA_MethodNode*)node)->executable = *(UA_Boolean*)value;
break;
case UA_ATTRIBUTEID_USEREXECUTABLE:
CHECK_NODECLASS_WRITE(UA_NODECLASS_METHOD);
CHECK_DATATYPE(BOOLEAN);
((UA_MethodNode*)node)->userExecutable = *(UA_Boolean*)value;
break;
default:
retval = UA_STATUSCODE_BADATTRIBUTEIDINVALID;
break;
}
if(type) {
UA_deleteMembers(target, type);
retval = UA_copy(value, target, type);
}
return retval;
}
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;
}