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#include "../include/sibs/BootstrapNode.hpp"
#include "../include/Log.hpp"
#ifndef WIN32
#include <arpa/inet.h>
#include <netdb.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include <udt/udt.h>
#include <sibs/SafeSerializer.hpp>
#include <sibs/SafeDeserializer.hpp>
namespace sibs
{
BootstrapNode::BootstrapNode(const Ipv4 &address) :
connections(address.getPort()),
socket(connections.createSocket(address, false, true))
{
if(connections.port != address.getPort())
{
throw SocketCreateException("BootstrapNode: Failed to bind port " + std::to_string(address.getPort()));
}
connections.onRemoveDisconnectedPeer([this](std::shared_ptr<DirectConnectionPeer> peer)
{
std::lock_guard<std::mutex> lock(subscribedPeersMutex);
for(auto &topicUsers : subscribedPeers)
{
for(auto it = topicUsers.second.begin(); it != topicUsers.second.end(); )
{
if(peer->address == (*it)->address)
it = topicUsers.second.erase(it);
else
++it;
}
}
});
if(UDT::listen(socket->udtSocket, 10) == UDT::ERROR)
{
std::string errMsg = "UDT: Failed to listen, error: ";
errMsg += UDT::getlasterror_desc();
throw BootstrapException(errMsg);
}
acceptConnectionsThread = std::thread(&BootstrapNode::acceptConnections, this);
}
BootstrapNode::~BootstrapNode()
{
std::lock_guard<std::mutex> lock(connections.peersMutex);
connections.alive = false;
socket.reset();
acceptConnectionsThread.join();
}
void BootstrapNode::acceptConnections()
{
sockaddr_storage clientAddr;
int addrLen = sizeof(clientAddr);
while(connections.alive)
{
UDTSOCKET clientUdtSocket = UDT::accept(socket->udtSocket, (sockaddr*)&clientAddr, &addrLen);
if(clientUdtSocket == UDT::INVALID_SOCK)
{
// Connection was killed because bootstrap node was taken down
if(!connections.alive)
return;
Log::error("UDT: Failed to accept connection, error: %s", UDT::getlasterror_desc());
std::this_thread::sleep_for(std::chrono::milliseconds(10));
continue;
}
auto clientSocket = std::make_unique<Socket>(clientUdtSocket);
char clientHost[NI_MAXHOST];
char clientService[NI_MAXSERV];
getnameinfo((sockaddr *)&clientAddr, addrLen, clientHost, sizeof(clientHost), clientService, sizeof(clientService), NI_NUMERICHOST | NI_NUMERICSERV);
Log::debug("UDT: New connection: %s:%s (socket: %d)", clientHost, clientService, clientUdtSocket);
std::lock_guard<std::mutex> lock(connections.peersMutex);
UDT::epoll_add_usock(connections.eid, clientUdtSocket);
clientSocket->eid = connections.eid;
std::shared_ptr<DirectConnectionPeer> peer = std::make_shared<DirectConnectionPeer>();
peer->socket = std::move(clientSocket);
sockaddr_in *clientAddrSock = (sockaddr_in*)&clientAddr;
memcpy(&peer->address.address, clientAddrSock, sizeof(peer->address.address));
peer->receiveDataCallbackFunc = std::bind(&BootstrapNode::messageFromClient, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4);
connections.peers[clientUdtSocket] = peer;
}
}
void BootstrapNode::messageFromClient(std::shared_ptr<DirectConnectionPeer> peer, MessageType messageType, const void *data, const usize size)
{
sibs::SafeDeserializer deserializer((const u8*)data, size);
PubsubKey pubsubKey;
deserializer.extract(pubsubKey.data.data(), PUBSUB_KEY_LENGTH);
if(messageType == MessageType::SUBSCRIBE)
{
Log::debug("BootstrapNode: Received peer subscribe from (ip: %s, port: %d)", peer->address.getAddress().c_str(), peer->address.getPort());
std::lock_guard<std::mutex> lock(subscribedPeersMutex);
auto &peers = subscribedPeers[pubsubKey];
for(auto &existingPeer : peers)
{
if(existingPeer->address == peer->address)
return;
}
sibs::SafeSerializer serializer;
serializer.add((u32)peer->address.address.sin_family);
serializer.add((u32)peer->address.address.sin_addr.s_addr);
serializer.add((u16)peer->address.address.sin_port);
auto newPeerMessage = std::make_shared<Message>(MessageType::SUBSCRIBE);
newPeerMessage->append(pubsubKey.data.data(), pubsubKey.data.size());
newPeerMessage->append(serializer.getBuffer().data(), serializer.getBuffer().size());
auto sendCallbackFunc = [](PubSubResult result, const std::string &resultStr)
{
Log::debug("BootstrapNode::peerSubscribe send result: %d, result string: %s", result, resultStr.c_str());
};
for(auto &existingPeer : peers)
{
connections.send(existingPeer, newPeerMessage, sendCallbackFunc);
}
sibs::SafeSerializer newPeerSerializer;
for(auto &existingPeer : peers)
{
newPeerSerializer.add((u32)existingPeer->address.address.sin_family);
newPeerSerializer.add((u32)existingPeer->address.address.sin_addr.s_addr);
newPeerSerializer.add((u16)existingPeer->address.address.sin_port);
}
peers.push_back(peer);
auto existingPeerMessage = std::make_shared<Message>(MessageType::SUBSCRIBE);
existingPeerMessage->append(pubsubKey.data.data(), pubsubKey.data.size());
existingPeerMessage->append(newPeerSerializer.getBuffer().data(), newPeerSerializer.getBuffer().size());
connections.send(peer, existingPeerMessage, sendCallbackFunc);
}
else if(messageType == MessageType::UNSUBSCRIBE)
{
Log::debug("BootstrapNode: Received peer unsubscribe from (ip: %s, port: %d)", peer->address.getAddress().c_str(), peer->address.getPort());
std::lock_guard<std::mutex> lock(subscribedPeersMutex);
auto &peers = subscribedPeers[pubsubKey];
for(auto it = peers.begin(); it != peers.end(); ++it)
{
auto existingPeer = *it;
if(existingPeer->address == peer->address)
{
peers.erase(it);
break;
}
}
}
else
{
Log::warn("BootstrapNode: received message from client that was not subscribe or unsubscribe");
}
}
}
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