92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
#include "examples/socks4a/tunnel.h"
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#include "muduo/base/ThreadLocal.h"
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#include <stdio.h>
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using namespace muduo;
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using namespace muduo::net;
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std::vector<InetAddress> g_backends;
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ThreadLocal<std::map<string, TunnelPtr> > t_tunnels;
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MutexLock g_mutex;
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size_t g_current = 0;
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void onServerConnection(const TcpConnectionPtr& conn)
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{
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LOG_DEBUG << (conn->connected() ? "UP" : "DOWN");
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std::map<string, TunnelPtr>& tunnels = t_tunnels.value();
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if (conn->connected())
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{
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conn->setTcpNoDelay(true);
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conn->stopRead();
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size_t current = 0;
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{
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MutexLockGuard guard(g_mutex);
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current = g_current;
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g_current = (g_current+1) % g_backends.size();
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}
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InetAddress backend = g_backends[current];
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TunnelPtr tunnel(new Tunnel(conn->getLoop(), backend, conn));
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tunnel->setup();
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tunnel->connect();
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tunnels[conn->name()] = tunnel;
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}
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else
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{
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assert(tunnels.find(conn->name()) != tunnels.end());
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tunnels[conn->name()]->disconnect();
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tunnels.erase(conn->name());
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}
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}
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void onServerMessage(const TcpConnectionPtr& conn, Buffer* buf, Timestamp)
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{
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if (!conn->getContext().empty())
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{
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const TcpConnectionPtr& clientConn
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= boost::any_cast<const TcpConnectionPtr&>(conn->getContext());
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clientConn->send(buf);
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}
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}
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int main(int argc, char* argv[])
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{
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if (argc < 3)
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{
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fprintf(stderr, "Usage: %s listen_port backend_ip:port [backend_ip:port]\n", argv[0]);
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}
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else
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{
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for (int i = 2; i < argc; ++i)
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{
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string hostport = argv[i];
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size_t colon = hostport.find(':');
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if (colon != string::npos)
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{
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string ip = hostport.substr(0, colon);
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uint16_t port = static_cast<uint16_t>(atoi(hostport.c_str()+colon+1));
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g_backends.push_back(InetAddress(ip, port));
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}
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else
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{
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fprintf(stderr, "invalid backend address %s\n", argv[i]);
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return 1;
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}
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}
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uint16_t port = static_cast<uint16_t>(atoi(argv[1]));
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InetAddress listenAddr(port);
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EventLoop loop;
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TcpServer server(&loop, listenAddr, "TcpBalancer");
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server.setConnectionCallback(onServerConnection);
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server.setMessageCallback(onServerMessage);
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server.setThreadNum(4);
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server.start();
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loop.loop();
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}
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}
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