int main(int argc, const char* argv[]) {
qInstallMessageHandler(Logging::verboseMessageHandler);
NodeList* nodeList = NodeList::createInstance(NODE_TYPE_DOMAIN, DOMAIN_LISTEN_PORT);
setvbuf(stdout, NULL, _IOLBF, 0);
ssize_t receivedBytes = 0;
char nodeType = '\0';
unsigned char broadcastPacket[MAX_PACKET_SIZE];
unsigned char* currentBufferPos;
unsigned char* startPointer;
sockaddr_in nodePublicAddress, nodeLocalAddress, replyDestinationSocket;
nodeLocalAddress.sin_family = AF_INET;
in_addr_t serverLocalAddress = getLocalAddress();
nodeList->startSilentNodeRemovalThread();
timeval lastStatSendTime = {};
const char ASSIGNMENT_SERVER_OPTION[] = "-a";
// grab the overriden assignment-server hostname from argv, if it exists
const char* customAssignmentServer = getCmdOption(argc, argv, ASSIGNMENT_SERVER_OPTION);
if (customAssignmentServer) {
sockaddr_in customAssignmentSocket = socketForHostnameAndHostOrderPort(customAssignmentServer, ASSIGNMENT_SERVER_PORT);
nodeList->setAssignmentServerSocket((sockaddr*) &customAssignmentSocket);
}
// use a map to keep track of iterations of silence for assignment creation requests
const long long GLOBAL_ASSIGNMENT_REQUEST_INTERVAL_USECS = 1 * 1000 * 1000;
timeval lastGlobalAssignmentRequest = {};
// as a domain-server we will always want an audio mixer and avatar mixer
// setup the create assignments for those
Assignment audioMixerAssignment(Assignment::CreateCommand,
Assignment::AudioMixerType,
Assignment::LocalLocation);
Assignment avatarMixerAssignment(Assignment::CreateCommand,
Assignment::AvatarMixerType,
Assignment::LocalLocation);
// construct a local socket to send with our created assignments to the global AS
sockaddr_in localSocket = {};
localSocket.sin_family = AF_INET;
localSocket.sin_port = htons(nodeList->getInstance()->getNodeSocket()->getListeningPort());
localSocket.sin_addr.s_addr = serverLocalAddress;
// setup the mongoose web server
struct mg_context *ctx;
struct mg_callbacks callbacks = {};
// list of options. Last element must be NULL.
const char *options[] = {"listening_ports", "8080",
"document_root", "./resources/web", NULL};
callbacks.begin_request = mongooseRequestHandler;
callbacks.upload = mongooseUploadHandler;
// Start the web server.
ctx = mg_start(&callbacks, NULL, options);
while (true) {
::assignmentQueueMutex.lock();
// check if our audio-mixer or avatar-mixer are dead and we don't have existing assignments in the queue
// so we can add those assignments back to the front of the queue since they are high-priority
if (!nodeList->soloNodeOfType(NODE_TYPE_AVATAR_MIXER) &&
std::find(::assignmentQueue.begin(), assignmentQueue.end(), &avatarMixerAssignment) == ::assignmentQueue.end()) {
qDebug("Missing an avatar mixer and assignment not in queue. Adding.\n");
::assignmentQueue.push_front(&avatarMixerAssignment);
}
if (!nodeList->soloNodeOfType(NODE_TYPE_AUDIO_MIXER) &&
std::find(::assignmentQueue.begin(), ::assignmentQueue.end(), &audioMixerAssignment) == ::assignmentQueue.end()) {
qDebug("Missing an audio mixer and assignment not in queue. Adding.\n");
::assignmentQueue.push_front(&audioMixerAssignment);
}
::assignmentQueueMutex.unlock();
while (nodeList->getNodeSocket()->receive((sockaddr *)&nodePublicAddress, packetData, &receivedBytes) &&
packetVersionMatch(packetData)) {
if (packetData[0] == PACKET_TYPE_DOMAIN_REPORT_FOR_DUTY || packetData[0] == PACKET_TYPE_DOMAIN_LIST_REQUEST) {
// this is an RFD or domain list request packet, and there is a version match
std::map<char, Node *> newestSoloNodes;
int numBytesSenderHeader = numBytesForPacketHeader(packetData);
nodeType = *(packetData + numBytesSenderHeader);
int numBytesSocket = unpackSocket(packetData + numBytesSenderHeader + sizeof(NODE_TYPE),
(sockaddr*) &nodeLocalAddress);
replyDestinationSocket = nodePublicAddress;
// check the node public address
// if it matches our local address
// or if it's the loopback address we're on the same box
if (nodePublicAddress.sin_addr.s_addr == serverLocalAddress ||
nodePublicAddress.sin_addr.s_addr == htonl(INADDR_LOOPBACK)) {
nodePublicAddress.sin_addr.s_addr = 0;
}
Node* newNode = nodeList->addOrUpdateNode((sockaddr*) &nodePublicAddress,
(sockaddr*) &nodeLocalAddress,
nodeType,
nodeList->getLastNodeID());
// if addOrUpdateNode returns NULL this was a solo node we already have, don't talk back to it
if (newNode) {
if (newNode->getNodeID() == nodeList->getLastNodeID()) {
nodeList->increaseNodeID();
}
int numHeaderBytes = populateTypeAndVersion(broadcastPacket, PACKET_TYPE_DOMAIN);
currentBufferPos = broadcastPacket + numHeaderBytes;
startPointer = currentBufferPos;
unsigned char* nodeTypesOfInterest = packetData + numBytesSenderHeader + sizeof(NODE_TYPE)
+ numBytesSocket + sizeof(unsigned char);
int numInterestTypes = *(nodeTypesOfInterest - 1);
if (numInterestTypes > 0) {
// if the node has sent no types of interest, assume they want nothing but their own ID back
for (NodeList::iterator node = nodeList->begin(); node != nodeList->end(); node++) {
if (!node->matches((sockaddr*) &nodePublicAddress, (sockaddr*) &nodeLocalAddress, nodeType) &&
memchr(nodeTypesOfInterest, node->getType(), numInterestTypes)) {
// this is not the node themselves
// and this is an node of a type in the passed node types of interest
// or the node did not pass us any specific types they are interested in
if (memchr(SOLO_NODE_TYPES, node->getType(), sizeof(SOLO_NODE_TYPES)) == NULL) {
// this is an node of which there can be multiple, just add them to the packet
// don't send avatar nodes to other avatars, that will come from avatar mixer
if (nodeType != NODE_TYPE_AGENT || node->getType() != NODE_TYPE_AGENT) {
currentBufferPos = addNodeToBroadcastPacket(currentBufferPos, &(*node));
}
} else {
// solo node, we need to only send newest
if (newestSoloNodes[node->getType()] == NULL ||
newestSoloNodes[node->getType()]->getWakeMicrostamp() < node->getWakeMicrostamp()) {
// we have to set the newer solo node to add it to the broadcast later
newestSoloNodes[node->getType()] = &(*node);
}
}
}
}
for (std::map<char, Node *>::iterator soloNode = newestSoloNodes.begin();
soloNode != newestSoloNodes.end();
soloNode++) {
// this is the newest alive solo node, add them to the packet
currentBufferPos = addNodeToBroadcastPacket(currentBufferPos, soloNode->second);
}
}
// update last receive to now
uint64_t timeNow = usecTimestampNow();
newNode->setLastHeardMicrostamp(timeNow);
if (packetData[0] == PACKET_TYPE_DOMAIN_REPORT_FOR_DUTY
&& memchr(SOLO_NODE_TYPES, nodeType, sizeof(SOLO_NODE_TYPES))) {
newNode->setWakeMicrostamp(timeNow);
}
// add the node ID to the end of the pointer
currentBufferPos += packNodeId(currentBufferPos, newNode->getNodeID());
// send the constructed list back to this node
nodeList->getNodeSocket()->send((sockaddr*)&replyDestinationSocket,
broadcastPacket,
(currentBufferPos - startPointer) + numHeaderBytes);
}
} else if (packetData[0] == PACKET_TYPE_REQUEST_ASSIGNMENT) {
qDebug("Received a request for assignment.\n");
::assignmentQueueMutex.lock();
// this is an unassigned client talking to us directly for an assignment
// go through our queue and see if there are any assignments to give out
std::deque<Assignment*>::iterator assignment = ::assignmentQueue.begin();
while (assignment != ::assignmentQueue.end()) {
// give this assignment out, no conditions stop us from giving it to the local assignment client
int numHeaderBytes = populateTypeAndVersion(broadcastPacket, PACKET_TYPE_CREATE_ASSIGNMENT);
int numAssignmentBytes = (*assignment)->packToBuffer(broadcastPacket + numHeaderBytes);
nodeList->getNodeSocket()->send((sockaddr*) &nodePublicAddress,
broadcastPacket,
numHeaderBytes + numAssignmentBytes);
// remove the assignment from the queue
::assignmentQueue.erase(assignment);
if ((*assignment)->getType() == Assignment::AgentType) {
// if this is a script assignment we need to delete it to avoid a memory leak
delete *assignment;
}
// stop looping, we've handed out an assignment
break;
}
::assignmentQueueMutex.unlock();
}
}
// if ASSIGNMENT_REQUEST_INTERVAL_USECS have passed since last global assignment request then fire off another
if (usecTimestampNow() - usecTimestamp(&lastGlobalAssignmentRequest) >= GLOBAL_ASSIGNMENT_REQUEST_INTERVAL_USECS) {
gettimeofday(&lastGlobalAssignmentRequest, NULL);
::assignmentQueueMutex.lock();
// go through our queue and see if there are any assignments to send to the global assignment server
std::deque<Assignment*>::iterator assignment = ::assignmentQueue.begin();
while (assignment != assignmentQueue.end()) {
if ((*assignment)->getLocation() != Assignment::LocalLocation) {
// attach our local socket to the assignment so the assignment-server can optionally hand it out
(*assignment)->setAttachedLocalSocket((sockaddr*) &localSocket);
nodeList->sendAssignment(*(*assignment));
// remove the assignment from the queue
::assignmentQueue.erase(assignment);
if ((*assignment)->getType() == Assignment::AgentType) {
// if this is a script assignment we need to delete it to avoid a memory leak
delete *assignment;
}
// stop looping, we've handed out an assignment
break;
} else {
// push forward the iterator to check the next assignment
assignment++;
}
}
::assignmentQueueMutex.unlock();
}
if (Logging::shouldSendStats()) {
if (usecTimestampNow() - usecTimestamp(&lastStatSendTime) >= (NODE_COUNT_STAT_INTERVAL_MSECS * 1000)) {
// time to send our count of nodes and servers to logstash
const char NODE_COUNT_LOGSTASH_KEY[] = "ds-node-count";
Logging::stashValue(STAT_TYPE_TIMER, NODE_COUNT_LOGSTASH_KEY, nodeList->getNumAliveNodes());
gettimeofday(&lastStatSendTime, NULL);
}
}
}
return 0;
}
int main(int argc, const char * argv[])
{
NodeList* nodeList = NodeList::createInstance(NODE_TYPE_DOMAIN, DOMAIN_LISTEN_PORT);
// If user asks to run in "local" mode then we do NOT replace the IP
// with the EC2 IP. Otherwise, we will replace the IP like we used to
// this allows developers to run a local domain without recompiling the
// domain server
bool isLocalMode = cmdOptionExists(argc, argv, "--local");
if (isLocalMode) {
printf("NOTE: Running in Local Mode!\n");
} else {
printf("--------------------------------------------------\n");
printf("NOTE: Running in EC2 Mode. \n");
printf("If you're a developer testing a local system, you\n");
printf("probably want to include --local on command line.\n");
printf("--------------------------------------------------\n");
}
setvbuf(stdout, NULL, _IOLBF, 0);
ssize_t receivedBytes = 0;
char nodeType = '\0';
unsigned char broadcastPacket[MAX_PACKET_SIZE];
int numHeaderBytes = populateTypeAndVersion(broadcastPacket, PACKET_TYPE_DOMAIN);
unsigned char* currentBufferPos;
unsigned char* startPointer;
sockaddr_in nodePublicAddress, nodeLocalAddress;
nodeLocalAddress.sin_family = AF_INET;
in_addr_t serverLocalAddress = getLocalAddress();
nodeList->startSilentNodeRemovalThread();
timeval lastStatSendTime = {};
while (true) {
if (nodeList->getNodeSocket()->receive((sockaddr *)&nodePublicAddress, packetData, &receivedBytes) &&
(packetData[0] == PACKET_TYPE_DOMAIN_REPORT_FOR_DUTY || packetData[0] == PACKET_TYPE_DOMAIN_LIST_REQUEST) &&
packetVersionMatch(packetData)) {
// this is an RFD or domain list request packet, and there is a version match
std::map<char, Node *> newestSoloNodes;
int numBytesSenderHeader = numBytesForPacketHeader(packetData);
nodeType = *(packetData + numBytesSenderHeader);
int numBytesSocket = unpackSocket(packetData + numBytesSenderHeader + sizeof(NODE_TYPE),
(sockaddr*) &nodeLocalAddress);
sockaddr* destinationSocket = (sockaddr*) &nodePublicAddress;
// check the node public address
// if it matches our local address we're on the same box
// so hardcode the EC2 public address for now
if (nodePublicAddress.sin_addr.s_addr == serverLocalAddress) {
// If we're not running "local" then we do replace the IP
// with the EC2 IP. Otherwise, we use our normal public IP
if (!isLocalMode) {
nodePublicAddress.sin_addr.s_addr = 895283510; // local IP in this format...
destinationSocket = (sockaddr*) &nodeLocalAddress;
}
}
Node* newNode = nodeList->addOrUpdateNode((sockaddr*) &nodePublicAddress,
(sockaddr*) &nodeLocalAddress,
nodeType,
nodeList->getLastNodeID());
if (newNode->getNodeID() == nodeList->getLastNodeID()) {
nodeList->increaseNodeID();
}
currentBufferPos = broadcastPacket + numHeaderBytes;
startPointer = currentBufferPos;
unsigned char* nodeTypesOfInterest = packetData + numBytesSenderHeader + sizeof(NODE_TYPE)
+ numBytesSocket + sizeof(unsigned char);
int numInterestTypes = *(nodeTypesOfInterest - 1);
if (numInterestTypes > 0) {
// if the node has sent no types of interest, assume they want nothing but their own ID back
for (NodeList::iterator node = nodeList->begin(); node != nodeList->end(); node++) {
if (!node->matches((sockaddr*) &nodePublicAddress, (sockaddr*) &nodeLocalAddress, nodeType) &&
memchr(nodeTypesOfInterest, node->getType(), numInterestTypes)) {
// this is not the node themselves
// and this is an node of a type in the passed node types of interest
// or the node did not pass us any specific types they are interested in
if (memchr(SOLO_NODE_TYPES, node->getType(), sizeof(SOLO_NODE_TYPES)) == NULL) {
// this is an node of which there can be multiple, just add them to the packet
// don't send avatar nodes to other avatars, that will come from avatar mixer
if (nodeType != NODE_TYPE_AGENT || node->getType() != NODE_TYPE_AGENT) {
currentBufferPos = addNodeToBroadcastPacket(currentBufferPos, &(*node));
}
} else {
// solo node, we need to only send newest
if (newestSoloNodes[node->getType()] == NULL ||
newestSoloNodes[node->getType()]->getWakeMicrostamp() < node->getWakeMicrostamp()) {
// we have to set the newer solo node to add it to the broadcast later
newestSoloNodes[node->getType()] = &(*node);
}
}
}
}
for (std::map<char, Node *>::iterator soloNode = newestSoloNodes.begin();
soloNode != newestSoloNodes.end();
soloNode++) {
// this is the newest alive solo node, add them to the packet
currentBufferPos = addNodeToBroadcastPacket(currentBufferPos, soloNode->second);
}
}
// update last receive to now
uint64_t timeNow = usecTimestampNow();
newNode->setLastHeardMicrostamp(timeNow);
if (packetData[0] == PACKET_TYPE_DOMAIN_REPORT_FOR_DUTY
&& memchr(SOLO_NODE_TYPES, nodeType, sizeof(SOLO_NODE_TYPES))) {
newNode->setWakeMicrostamp(timeNow);
}
// add the node ID to the end of the pointer
currentBufferPos += packNodeId(currentBufferPos, newNode->getNodeID());
// send the constructed list back to this node
nodeList->getNodeSocket()->send(destinationSocket,
broadcastPacket,
(currentBufferPos - startPointer) + numHeaderBytes);
}
if (Logstash::shouldSendStats()) {
if (usecTimestampNow() - usecTimestamp(&lastStatSendTime) >= (NODE_COUNT_STAT_INTERVAL_MSECS * 1000)) {
// time to send our count of nodes and servers to logstash
const char NODE_COUNT_LOGSTASH_KEY[] = "ds-node-count";
Logstash::stashValue(STAT_TYPE_TIMER, NODE_COUNT_LOGSTASH_KEY, nodeList->getNumAliveNodes());
gettimeofday(&lastStatSendTime, NULL);
}
}
}
return 0;
}