稍后在我的应用程序中，我将有三个线程：一个线程监听端口上的数据，一个线程将数据发送到同一端口上的地址。最后一个在这里并不重要。
目前，我不使用线程，我只是想做一些测试。
我的问题如下：
如果我只是使用服务器发送和接收数据，则没有问题。但是当它是发送数据的客户端时，它就像遥远的同伴没有收到任何东西。
我的服务器代码：
#include "server.h"
using namespace boost::asio::ip;
using Peer = udp::endpoint;
Server::Server(boost::asio::io_service& io_service, Peer peer, Agent& agent) :
socket_(io_service, Peer(boost::asio::ip::udp::v6(), peer.port())),
recv_buffer_(), send_buffer_(), root_(peer), agent_(agent)
{
/* //when this is uncomment, that works fine
BOOST_LOG_TRIVIAL(info) << "Server Initialisation:";
std::shared_ptr<PeersReq> peersreq(new PeersReq());
std::vector<std::shared_ptr<Tlv>> tlv_vector;
tlv_vector.push_back(peersreq);
Packet packet(tlv_vector);
write_log(packet, peer);
boost::asio::streambuf request;
std::ostream os(&request);
packet.format(os);
std::cout << peer.address() << std::endl;
int n = static_cast<int>(socket_.send_to(request.data(),peer));
BOOST_LOG_TRIVIAL(debug) << "Bytes sent: " << n << std::endl;
*/
}
void Server::write_log(Packet packet, Peer peer) {
BOOST_LOG_TRIVIAL(info) << "Packet send to " << peer.address().to_string() << ":" << peer.port() << std::endl;
BOOST_LOG_TRIVIAL(info) << "Packet\n" << packet << std::endl;
}
void Server::receive() {
Peer peer;
BOOST_LOG_TRIVIAL(info) << "Now listening on port:" << root_.port() << std::endl;
socket_.receive_from(boost::asio::buffer(recv_buffer_), peer);
BOOST_LOG_TRIVIAL(info) << "Packet received" << std::endl;
std::cout << static_cast<int>(recv_buffer_[0]) << std::endl;
std::cout << static_cast<int>(recv_buffer_[1]) << std::endl;
if (recv_buffer_[0] != 57) //TO DO magic number
exit(EXIT_FAILURE); //Change this to send a bad
else if(recv_buffer_[1] != 0) //TO DO magic number
exit(EXIT_FAILURE);
uint16_t packet_length = static_cast<uint16_t>((recv_buffer_[2]<<8)+recv_buffer_[3]);
std::cout << packet_length << std::endl;
if (packet_length > 1024) //TODO magic number
exit(EXIT_FAILURE);
//maybe log ?
for(int i = 0 ; i < packet_length ; i++)
std::cout << i << ":" << (static_cast<int>(recv_buffer_[i+4]) & 0xFF) << std::endl;
Packet packet = Packet::from_string(recv_buffer_.data()+4, packet_length);
std::cout << "packet received" << std::endl;
std::cout << packet << std::endl;
//agent_.notify(packet, peer);
/*
boost::asio::streambuf request;
std::ostream os(&request);
packet_to_send.format(os);
//std::cout << request.size() << std::endl;
socket_.send_to(request.data(), peer);
*/
receive();
}
我客户的代码如下：
Client::Client(boost::asio::io_service& io_service, Peer peer) : socket_(io_service, Peer(boost::asio::ip::udp::v6(), peer.port())) , peers_(), queue_peer_() {
//socket_.open(boost::asio::ip::udp::v6());
peers_.insert(peer);
queue_peer_.insert(std::make_pair(peer.address().to_string(),std::vector<std::shared_ptr<Tlv>>()));
std::shared_ptr<PeersReq> peersReq(new PeersReq());
add_tlv_to_queue(peersReq, peer);
send();
}
void Client::add_tlv_to_queue(std::shared_ptr<Tlv> tlv, Peer peer) {
if(queue_peer_.find(peer.address().to_string())!= queue_peer_.end()) {
peers_.insert(peer);
queue_peer_.insert(std::make_pair(peer.address().to_string(),std::vector<std::shared_ptr<Tlv>>()));
}
queue_peer_.find(peer.address().to_string())->second.push_back(tlv);
}
void Client::send() {
for ( std::unordered_map<std::string, std::vector<std::shared_ptr<Tlv>>>::iterator it = queue_peer_.begin(); it != queue_peer_.end(); ++it ) {
if(it->second.size()>0) {
boost::asio::streambuf request;
std::ostream os(&request);
Packet packet(it->second);
packet.format(os);
Peer peer = get_peer_from_string(it->first);
std::cout << peer.address() << std::endl;
int n = static_cast<int>(socket_.send_to(request.data(),peer));
}
}
}
Peer Client::get_peer_from_string(std::string string) {
Peer peer;
for(std::set<Peer>::const_iterator it =peers_.begin() ; it != peers_.end() ; it++) {
if(it->address().to_string() == string)
peer=*it;
}
//undefined behaviour if the peer is not registred. But it shouldn't happen
return peer;
}
主要使用以下代码：
Agent agent(storage, peer);
Server server(io_service_server, peer, agent);
Client client(io_service_client, peer);
server.receive();
我不知道我是不是做了什么坏事，或者有什么特别的东西来获得这个行为。
编辑：
这是一个片段：
#include<array>
#include<boost/asio.hpp>
#include<iostream>
using Peer = boost::asio::ip::udp::endpoint;
using namespace boost::asio::ip;
class Server {
public:
Server(boost::asio::io_service& io_service, Peer peer);
void receive();
private:
boost::asio::ip::udp::socket socket_;
std::array<char, 1024> recv_buffer_;
};
Server::Server(boost::asio::io_service& io_service, Peer peer) :
socket_(io_service, Peer(boost::asio::ip::udp::v6(), peer.port())),
recv_buffer_()
{
boost::asio::streambuf request;
std::ostream os(&request);
os << "Server";
int n = static_cast<int>(socket_.send_to(request.data(),peer));
}
void Server::receive() {
Peer peer;
socket_.receive_from(boost::asio::buffer(recv_buffer_), peer);
std::cout << static_cast<int>(recv_buffer_[0]) << std::endl;
receive();
}
class Client {
public:
Client(boost::asio::io_service& io_service, Peer peer);
void send(Peer peer);
private:
boost::asio::ip::udp::socket socket_;
};
Client::Client(boost::asio::io_service& io_service, Peer peer) : socket_(io_service) {
socket_.open(boost::asio::ip::udp::v6());
send(peer);
}
void Client::send(Peer peer) {
boost::asio::streambuf request;
std::ostream os(&request);
os << "Client";
int n = static_cast<int>(socket_.send_to(request.data(),peer));
}
int main(int argc, char* argv[]) {
boost::asio::io_service io_service_client;
boost::asio::io_service io_service_server;
Peer peer;
peer.address(); //Add an address here
peer.port(12345);
Client client(io_service_client, peer);
Server server(io_service_server, peer);
return 0;
}