317 lines
10 KiB
C
317 lines
10 KiB
C
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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#ifndef _ABSTRACT_TCP_SERVER_H_
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#define _ABSTRACT_TCP_SERVER_H_
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#include <process.h>
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#include <list>
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#include <winsock2.h>
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#include "winobj.h"
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//#include "threads_helper.h"
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#include "net_utils_base.h"
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#pragma comment(lib, "Ws2_32.lib")
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namespace epee
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{
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namespace net_utils
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{
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/************************************************************************/
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/* */
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/************************************************************************/
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class soket_sender: public i_service_endpoint
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{
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public:
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soket_sender(SOCKET sock):m_sock(sock){}
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private:
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virtual bool handle_send(const void* ptr, size_t cb)
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{
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if(cb != send(m_sock, (char*)ptr, (int)cb, 0))
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{
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int sock_err = WSAGetLastError();
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LOG_ERROR("soket_sender: Failed to send " << cb << " bytes, Error=" << sock_err);
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return false;
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}
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return true;
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}
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SOCKET m_sock;
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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template<class THandler>
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class abstract_tcp_server
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{
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public:
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abstract_tcp_server();
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bool init_server(int port_no);
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bool deinit_server();
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bool run_server();
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bool send_stop_signal();
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typename THandler::config_type& get_config_object(){return m_config;}
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private:
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bool invoke_connection(SOCKET hnew_sock, long ip_from, int post_from);
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static unsigned __stdcall ConnectionHandlerProc(void* lpParameter);
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class thread_context;
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typedef std::list<thread_context> connections_container;
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typedef typename connections_container::iterator connections_iterator;
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struct thread_context
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{
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HANDLE m_htread;
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SOCKET m_socket;
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abstract_tcp_server* powner;
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connection_context m_context;
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typename connections_iterator m_self_it;
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};
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SOCKET m_listen_socket;
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int m_port;
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bool m_initialized;
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volatile LONG m_stop_server;
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volatile LONG m_threads_count;
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typename THandler::config_type m_config;
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connections_container m_connections;
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critical_section m_connections_lock;
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};
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template<class THandler>
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unsigned __stdcall abstract_tcp_server<THandler>::ConnectionHandlerProc(void* lpParameter)
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{
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thread_context* pthread_context = (thread_context*)lpParameter;
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if(!pthread_context)
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return 0;
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abstract_tcp_server<THandler>* pthis = pthread_context->powner;
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::InterlockedIncrement(&pthis->m_threads_count);
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::CoInitialize(NULL);
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LOG_PRINT("Handler thread STARTED with socket=" << pthread_context->m_socket, LOG_LEVEL_2);
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int res = 0;
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soket_sender sndr(pthread_context->m_socket);
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THandler srv(&sndr, pthread_context->powner->m_config, pthread_context->m_context);
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srv.after_init_connection();
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char buff[1000] = {0};
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std::string ansver;
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while ( (res = recv(pthread_context->m_socket, (char*)buff, 1000, 0)) > 0)
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{
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LOG_PRINT("Data in, " << res << " bytes", LOG_LEVEL_3);
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if(!srv.handle_recv(buff, res))
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break;
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}
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shutdown(pthread_context->m_socket, SD_BOTH);
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closesocket(pthread_context->m_socket);
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abstract_tcp_server* powner = pthread_context->powner;
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LOG_PRINT("Handler thread with socket=" << pthread_context->m_socket << " STOPPED", LOG_LEVEL_2);
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powner->m_connections_lock.lock();
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::CloseHandle(pthread_context->m_htread);
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pthread_context->powner->m_connections.erase(pthread_context->m_self_it);
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powner->m_connections_lock.unlock();
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CoUninitialize();
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::InterlockedDecrement(&pthis->m_threads_count);
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return 1;
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}
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//----------------------------------------------------------------------------------------
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template<class THandler>
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abstract_tcp_server<THandler>::abstract_tcp_server():m_listen_socket(INVALID_SOCKET),
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m_initialized(false),
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m_stop_server(0), m_port(0), m_threads_count(0)
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{
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}
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//----------------------------------------------------------------------------------------
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template<class THandler>
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bool abstract_tcp_server<THandler>::init_server(int port_no)
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{
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m_port = port_no;
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WSADATA wsad = {0};
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int err = ::WSAStartup(MAKEWORD(2,2), &wsad);
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if ( err != 0 || LOBYTE( wsad.wVersion ) != 2 || HIBYTE( wsad.wVersion ) != 2 )
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{
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LOG_ERROR("Could not find a usable WinSock DLL, err = " << err << " \"" << socket_errors::get_socket_error_text(err) <<"\"");
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return false;
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}
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m_initialized = true;
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m_listen_socket = ::WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, 0);
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if(INVALID_SOCKET == m_listen_socket)
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{
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err = ::WSAGetLastError();
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LOG_ERROR("Failed to create socket, err = " << err << " \"" << socket_errors::get_socket_error_text(err) <<"\"");
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return false;
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}
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int opt = 1;
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setsockopt (m_listen_socket, SOL_SOCKET,SO_REUSEADDR, reinterpret_cast<char*>(&opt), sizeof(int));
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sockaddr_in adr = {0};
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adr.sin_family = AF_INET;
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adr.sin_addr.s_addr = htonl(INADDR_ANY);
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adr.sin_port = (u_short)htons(port_no);
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err = bind(m_listen_socket, (const sockaddr*)&adr, sizeof(adr ));
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if(SOCKET_ERROR == err )
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{
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err = ::WSAGetLastError();
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LOG_PRINT("Failed to Bind, err = " << err << " \"" << socket_errors::get_socket_error_text(err) <<"\"", LOG_LEVEL_2);
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deinit_server();
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return false;
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}
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::InterlockedExchange(&m_stop_server, 0);
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return true;
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}
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//----------------------------------------------------------------------------------------
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template<class THandler>
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bool abstract_tcp_server<THandler>::deinit_server()
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{
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if(!m_initialized)
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return true;
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if(INVALID_SOCKET != m_listen_socket)
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{
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shutdown(m_listen_socket, SD_BOTH);
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int res = closesocket(m_listen_socket);
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if(SOCKET_ERROR == res)
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{
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int err = ::WSAGetLastError();
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LOG_ERROR("Failed to closesocket(), err = " << err << " \"" << socket_errors::get_socket_error_text(err) <<"\"");
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}
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m_listen_socket = INVALID_SOCKET;
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}
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int res = ::WSACleanup();
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if(SOCKET_ERROR == res)
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{
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int err = ::WSAGetLastError();
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LOG_ERROR("Failed to WSACleanup(), err = " << err << " \"" << socket_errors::get_socket_error_text(err) <<"\"");
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}
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m_initialized = false;
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return true;
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}
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//----------------------------------------------------------------------------------------
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template<class THandler>
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bool abstract_tcp_server<THandler>::send_stop_signal()
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{
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InterlockedExchange(&m_stop_server, 1);
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return true;
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}
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//----------------------------------------------------------------------------------------
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template<class THandler>
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bool abstract_tcp_server<THandler>::run_server()
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{
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int err = listen(m_listen_socket, 10000);
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if(SOCKET_ERROR == err )
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{
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err = ::WSAGetLastError();
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LOG_ERROR("Failed to listen, err = " << err << " \"" << socket_errors::get_socket_error_text(err) <<"\"");
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return false;
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}
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LOG_PRINT("Listening port "<< m_port << "...." , LOG_LEVEL_2);
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while(!m_stop_server)
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{
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sockaddr_in adr_from = {0};
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int adr_len = sizeof(adr_from);
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fd_set read_fs = {0};
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read_fs.fd_count = 1;
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read_fs.fd_array[0] = m_listen_socket;
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TIMEVAL tv = {0};
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tv.tv_usec = 100;
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int select_res = select(0, &read_fs, NULL, NULL, &tv);
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if(!select_res)
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continue;
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SOCKET new_sock = WSAAccept(m_listen_socket, (sockaddr *)&adr_from, &adr_len, NULL, NULL);
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LOG_PRINT("Accepted connection on socket=" << new_sock, LOG_LEVEL_2);
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invoke_connection(new_sock, adr_from.sin_addr.s_addr, adr_from.sin_port);
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}
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deinit_server();
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#define ABSTR_TCP_SRV_WAIT_COUNT_MAX 5000
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#define ABSTR_TCP_SRV_WAIT_COUNT_INTERVAL 1000
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int wait_count = 0;
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while(m_threads_count && wait_count*1000 < ABSTR_TCP_SRV_WAIT_COUNT_MAX)
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{
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::Sleep(ABSTR_TCP_SRV_WAIT_COUNT_INTERVAL);
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wait_count++;
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}
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LOG_PRINT("abstract_tcp_server exit with wait count=" << wait_count*ABSTR_TCP_SRV_WAIT_COUNT_INTERVAL << "(max=" << ABSTR_TCP_SRV_WAIT_COUNT_MAX <<")", LOG_LEVEL_0);
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return true;
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}
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//----------------------------------------------------------------------------------------
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template<class THandler>
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bool abstract_tcp_server<THandler>::invoke_connection(SOCKET hnew_sock, long ip_from, int post_from)
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{
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m_connections_lock.lock();
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m_connections.push_back(thread_context());
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m_connections_lock.unlock();
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m_connections.back().m_socket = hnew_sock;
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m_connections.back().powner = this;
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m_connections.back().m_self_it = --m_connections.end();
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m_connections.back().m_context.m_remote_ip = ip_from;
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m_connections.back().m_context.m_remote_port = post_from;
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m_connections.back().m_htread = threads_helper::create_thread(ConnectionHandlerProc, &m_connections.back());
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return true;
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}
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//----------------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------------
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//----------------------------------------------------------------------------------------
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}
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}
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#endif //_ABSTRACT_TCP_SERVER_H_
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