bool CrossfireServer::processHandshake(wchar_t* msg) {
std::wstring string(msg);
size_t start = wcslen(HANDSHAKE);
size_t index = string.find_first_of(std::wstring(L"\r\n"), start);
if (index == std::wstring::npos) {
Logger::error("Invalid handshake packet, does not contain terminating '\\r\\n'");
return false;
}
if (index != string.length() - 2) {
Logger::error("Invalid handshake packet, length extends beyond terminating '\\r\\n'");
return false;
}
std::wstring tools = string.substr(start, index - start);
m_handshakeReceived = true;
std::wstring handshake(HANDSHAKE);
/* for now don't claim support for any tools */
handshake.append(std::wstring(L"\r\n"));
m_connection->send(handshake.c_str());
/*
* Some events may have been queued in the interval between the initial connection
* and the handshake. These events can be sent now that the handshake is complete.
*/
sendPendingEvents();
return true;
}
void ResourceManager::decodeResource( ResourceLoadOptions& options )
{
Task* task = Allocate(GetResourcesAllocator(), Task);
ResourceLoadOptions* taskOptions = Allocate(GetResourcesAllocator(),
ResourceLoadOptions);
*taskOptions = options;
task->callback.Bind(ResourceTaskRun);
task->userdata = taskOptions;
numResourcesQueuedLoad.increment();
#ifdef ENABLE_THREADED_LOADING
if( taskPool && asynchronousLoading && options.asynchronousLoad )
{
taskPool->add(task, options.isHighPriority);
return;
}
#endif
task->run();
sendPendingEvents();
}
void ResourceManager::update()
{
sendPendingEvents();
// Update the archive watches.
archive->monitor();
removeUnusedResources();
}
void CrossfireServer::received(wchar_t* msg) {
if (!m_handshakeReceived) {
if (wcsncmp(msg, HANDSHAKE, wcslen(HANDSHAKE)) == 0) {
processHandshake(msg);
m_lastRequestSeq = -1;
} else {
Logger::error("Crossfire content received before handshake, not processing it");
}
return;
}
m_inProgressPacket->append(std::wstring(msg));
std::wstring packet;
do {
wchar_t* parseErrorMessage = NULL;
bool errorMessageRequiresFree = false;
int code = CODE_OK;
packet.clear();
if (m_inProgressPacket->find(HEADER_CONTENTLENGTH) != 0) {
code = CODE_MALFORMED_PACKET;
parseErrorMessage = L"request packet does not start with 'Content-Length:', not processing it";
m_inProgressPacket->clear();
break;
}
size_t endIndex = m_inProgressPacket->find(wchar_t('\r'));
if (endIndex == std::wstring::npos) {
code = CODE_MALFORMED_PACKET;
parseErrorMessage = L"request packet does not contain '\r', not processing it";
m_inProgressPacket->clear();
break;
}
size_t headerLength = wcslen(HEADER_CONTENTLENGTH);
std::wstring lengthString = m_inProgressPacket->substr(headerLength, endIndex - headerLength);
int lengthValue = _wtoi(lengthString.c_str());
if (!lengthValue) {
code = CODE_MALFORMED_PACKET;
parseErrorMessage = L"request packet does not have a valid 'Content-Length' value, not processing it";
m_inProgressPacket->clear();
break;
}
if (m_inProgressPacket->find(L"\r\n", endIndex) != endIndex) {
code = CODE_MALFORMED_PACKET;
parseErrorMessage = L"request packet does not follow initial '\\r' with '\\n', not processing it";
m_inProgressPacket->clear();
break;
}
// TODO for now just skip over "tool:" lines, though these should really be validated
size_t toolEnd = m_inProgressPacket->find(L"\r\n\r\n", endIndex);
if (toolEnd == std::wstring::npos) {
code = CODE_MALFORMED_PACKET;
parseErrorMessage = L"request packet does not contain '\\r\\n\\r\\n' to delimit its header, not processing it";
m_inProgressPacket->clear();
break;
}
size_t toolsLength = toolEnd - endIndex;
size_t targetLength = wcslen(HEADER_CONTENTLENGTH) + lengthString.length() + 3 * LINEBREAK_LENGTH + toolsLength + lengthValue;
if (targetLength <= m_inProgressPacket->length()) {
packet.assign(m_inProgressPacket->substr(0, targetLength));
m_inProgressPacket->erase(0, targetLength);
}
if (packet.length()) {
CrossfireRequest* request = NULL;
code = m_processor->parseRequestPacket(&packet, &request, &parseErrorMessage);
if (code != CODE_OK) {
errorMessageRequiresFree = true;
} else {
unsigned int seq = request->getSeq();
if (!(m_lastRequestSeq == -1 || seq == m_lastRequestSeq + 1)) {
// TODO handle out-of-order packets
Logger::log("packet received out of sequence, still processing it");
}
m_lastRequestSeq = seq;
m_processingRequest = true;
if (!performRequest(request)) {
/*
* the request's command was not handled by the server,
* so try to delegate to the specified context, if any
*/
CrossfireContext* context = getRequestContext(request);
if (!context) {
Logger::error("request command was unknown to the server and a valid context id was not provided, not processing it");
} else {
if (!context->performRequest(request)) {
Logger::error("request command was unknown to the server and to the specified context, not processing it");
}
}
}
m_processingRequest = false;
delete request;
/*
* Debugger events may have been received in response to the request that was
* just processed. These events can be sent now that processing of the request
* is complete.
*/
sendPendingEvents();
}
}
if (code) {
CrossfireResponse response;
response.setCode(CODE_MALFORMED_PACKET);
response.setMessage(parseErrorMessage);
if (errorMessageRequiresFree) {
free(parseErrorMessage);
}
Value emptyBody;
emptyBody.setType(TYPE_OBJECT);
response.setBody(&emptyBody);
sendResponse(&response);
}
} while (packet.length() > 0 && m_inProgressPacket->length() > 0);
}
