/wconsd.c - Annotate - wconsd - Zot Projects

root/wconsd.c @ 66a63de2

62045e98	Hamish Coleman	/*
		* wconsd.c - serial port server service for Windows NT
		*
83cf653a	Hamish Coleman	* Copyright (c) 2008 Hamish Coleman <hamish@zot.org>
		* 2003 Benjamin Schweizer <gopher at h07 dot org>
62045e98	Hamish Coleman	* 1998 Stephen Early <Stephen.Early@cl.cam.ac.uk>
		*
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		*/
78d4c0b0	Hamish Coleman
b6970c98	Hamish Coleman	/* Note: winsock2.h MUST be included before windows.h */

		#include <winsock2.h>
08ceb73b	Hamish Coleman	#include <ws2tcpip.h>
b6970c98	Hamish Coleman	#include <windows.h>
		#include <winsvc.h>
		#include <stdio.h>
		#include <stdlib.h>

e592f8f7	Hamish Coleman	#include "scm.h"

5ddf869b	Hamish Coleman	#include "libcli/libcli.h"

479f1136	Hamish Coleman	#define VERSION "0.2.6"
62045e98	Hamish Coleman
78d4c0b0	Hamish Coleman	/* Size of buffers for send and receive */
		#define BUFSIZE 1024
62045e98	Hamish Coleman	#define MAXLEN 1024
78d4c0b0	Hamish Coleman
		/* Sockets for listening and communicating */
3eb633b1	Hamish Coleman	SOCKET ls=INVALID_SOCKET;
78d4c0b0	Hamish Coleman
		/* Event objects */
3eb633b1	Hamish Coleman	HANDLE stopEvent;
78d4c0b0	Hamish Coleman	HANDLE readEvent, writeEvent;
		WSAEVENT listenSocketEvent;

		/* COM port */
		DCB dcb;
62045e98	Hamish Coleman	COMMTIMEOUTS timeouts;
61b53eda	Hamish Coleman
		/* Port default settings are here */
		int com_port=1;
		DWORD com_speed=9600;
		BYTE com_data=8;
		BYTE com_parity=NOPARITY;
		BYTE com_stop=ONESTOPBIT;
78d4c0b0	Hamish Coleman
b9a4e090	Hamish Coleman	int default_tcpport = 23;
61b53eda	Hamish Coleman
4cb40453	Hamish Coleman	/* TODO - these buffers are ugly and large */
		char *hostname[BUFSIZE];
		struct hostent *host_entry;

78d4c0b0	Hamish Coleman	/* Service status: our current status, and handle on service manager */
		SERVICE_STATUS wconsd_status;
		SERVICE_STATUS_HANDLE wconsd_statusHandle;

25fa1d20	Hamish Coleman	int debug_mode = 0;

479f1136	Hamish Coleman	/* these match the official telnet codes */
		#define TELNET_OPTION_SB 0xfa
		#define TELNET_OPTION_WILL 0xfb
		#define TELNET_OPTION_WONT 0xfc
		#define TELNET_OPTION_DO 0xfd
		#define TELNET_OPTION_DONT 0xfe
		#define TELNET_OPTION_IAC 0xff

		/* these are my local state-tracking codes */
		#define TELNET_OPTION_SBXX 0xfa00 /* received IAC SB xx */

ef78cec5	Hamish Coleman	#define MAXCONNECTIONS 8

2d552dd4	Hamish Coleman	int next_connection_id = 1; /* lifetime unique connection id */
aaba0a4c	Hamish Coleman	int next_connection_slot = 0; /* next slot to look at for new connection */
ef78cec5	Hamish Coleman	struct connection {
884971fc	Hamish Coleman	int active; /* an active entry cannot be reused */
		int id; /* connection identifier */
ef78cec5	Hamish Coleman	HANDLE menuThread;
		SOCKET net;
aaba0a4c	Hamish Coleman	int serialconnected;
ef78cec5	Hamish Coleman	HANDLE serial;
		HANDLE serialThread;
3fa88c6f	Hamish Coleman	int option_runmenu; /* are we at the menu? */
479f1136	Hamish Coleman	int option_binary; /* binary transmission requested */
		int option_echo; /* will we echo chars received? */
3fa88c6f	Hamish Coleman	int option_keepalive; /* will we send IAC NOPs all the time? */
ef78cec5	Hamish Coleman	int net_bytes_rx;
		int net_bytes_tx;
3fa88c6f	Hamish Coleman	struct sockaddr *sa;
479f1136	Hamish Coleman	int telnet_option; /* Set to indicate option processing status */
		int telnet_option_param;/* saved parameters from telnet options */
ef78cec5	Hamish Coleman	};
		struct connection connection[MAXCONNECTIONS];

5ddf869b	Hamish Coleman	struct cli_def *cli;
4dcb97c2	Hamish Coleman
		int wconsd_init(int argc, char **argv);
		int wconsd_main(int param1);
		int wconsd_stop(int param1);
		struct SCM_def sd = {
		"wconsd","wconsd - Telnet to Serial server",
		wconsd_init, wconsd_main, wconsd_stop
		};

61b53eda	Hamish Coleman	/*
e6a4efc5	Hamish Coleman	* output from OutputDebugStringA can be seen using sysinternals debugview
61b53eda	Hamish Coleman	* http://technet.microsoft.com/en-us/sysinternals/bb896647.aspx
		*/
e6a4efc5	Hamish Coleman
		/*
		* log a debug message
		*/
		int dprintf_level = 1;
		int dprintf(unsigned char severity, const char *fmt, ...) {
		va_list args;
c7c4a6f7	Hamish Coleman	char buf[MAXLEN];
e6a4efc5	Hamish Coleman	int i;

		if (severity > dprintf_level)
		return 0;

		va_start(args,fmt);
c0d1e8fe	Hamish Coleman	i=vsnprintf(buf,sizeof(buf),fmt,args);
e6a4efc5	Hamish Coleman	va_end(args);

25fa1d20	Hamish Coleman	if (debug_mode) {
		printf("%s",buf);
		} else {
		OutputDebugStringA(buf);
		}
e6a4efc5	Hamish Coleman
		return i;
78d4c0b0	Hamish Coleman	}

c7c4a6f7	Hamish Coleman	/*
884971fc	Hamish Coleman	* format a string and send it to a net connection
c7c4a6f7	Hamish Coleman	*/
884971fc	Hamish Coleman	int netprintf(struct connection conn, const char fmt, ...) {
c7c4a6f7	Hamish Coleman	va_list args;
		char buf[MAXLEN];
		int i;
884971fc	Hamish Coleman	int bytes;
c7c4a6f7	Hamish Coleman
		va_start(args,fmt);
		i=vsnprintf(buf,sizeof(buf),fmt,args);
		va_end(args);

884971fc	Hamish Coleman	bytes = send(conn->net,buf,(i>MAXLEN)?MAXLEN-1:i,0);

		if (bytes==-1) {
08ceb73b	Hamish Coleman	dprintf(1,"wconsd[%i]: netprintf: send error %i\n",conn->id,GetLastError());
884971fc	Hamish Coleman	} else {
		conn->net_bytes_tx += bytes;
		}

c7c4a6f7	Hamish Coleman	return i;
		}

62045e98	Hamish Coleman	/* open the com port */
4991f810	Hamish Coleman	int open_com_port(struct connection *conn) {
62045e98	Hamish Coleman	/* Open the COM port */
		char portstr[12];
aaba0a4c	Hamish Coleman
		if (conn->serialconnected) {
		dprintf(1,"wcons[%i]: open_com_port: serialconnected\n",conn->id);
		}

62045e98	Hamish Coleman	sprintf(portstr, "\\\\.\\COM%d", com_port);
aaba0a4c	Hamish Coleman	conn->serial = CreateFile(portstr,
62045e98	Hamish Coleman	GENERIC_READ \| GENERIC_WRITE,
		0, // Exclusive access
		NULL,
		OPEN_EXISTING,
		FILE_FLAG_OVERLAPPED,
		NULL);
aaba0a4c	Hamish Coleman	if (conn->serial == INVALID_HANDLE_VALUE) {
4991f810	Hamish Coleman	return -1;
62045e98	Hamish Coleman	}

aaba0a4c	Hamish Coleman	if (!GetCommState(conn->serial, &dcb)) {
4991f810	Hamish Coleman	return -1;
62045e98	Hamish Coleman	}

		// Fill in the device control block
		dcb.BaudRate=com_speed;
		dcb.ByteSize=com_data;
		dcb.Parity=com_parity; // NOPARITY, ODDPARITY, EVENPARITY
		dcb.StopBits=com_stop; // ONESTOPBIT, ONE5STOPBITS, TWOSTOPBITS
		dcb.fBinary=TRUE;
		dcb.fOutxCtsFlow=FALSE;
		dcb.fOutxDsrFlow=FALSE;
		dcb.fDtrControl=DTR_CONTROL_ENABLE; // Always on
		dcb.fDsrSensitivity=FALSE;
		dcb.fTXContinueOnXoff=FALSE;
		dcb.fOutX=FALSE;
		dcb.fInX=FALSE;
		dcb.fErrorChar=FALSE;
		dcb.fNull=FALSE;
		dcb.fRtsControl=RTS_CONTROL_ENABLE; // Always on
		dcb.fAbortOnError=FALSE;

aaba0a4c	Hamish Coleman	if (!SetCommState(conn->serial, &dcb)) {
4991f810	Hamish Coleman	return -1;
62045e98	Hamish Coleman	}

4cb40453	Hamish Coleman	/* FIXME - these values need much more tuning */
62045e98	Hamish Coleman	timeouts.ReadIntervalTimeout=20;
		timeouts.ReadTotalTimeoutMultiplier=0;
4cb40453	Hamish Coleman	/*
		* Note that this means that the serial to net thread wakes
		* each and ever 50 milliseconds
		*/
		timeouts.ReadTotalTimeoutConstant=50;
62045e98	Hamish Coleman	timeouts.WriteTotalTimeoutMultiplier=0;
		timeouts.WriteTotalTimeoutConstant=0;
aaba0a4c	Hamish Coleman	if (!SetCommTimeouts(conn->serial, &timeouts)) {
4991f810	Hamish Coleman	return -1;
62045e98	Hamish Coleman	}
aaba0a4c	Hamish Coleman	conn->serialconnected=1;
62045e98	Hamish Coleman	return 0;
		}

		/* close the com port */
aaba0a4c	Hamish Coleman	void close_com_port(struct connection *conn) {
		CloseHandle(conn->serial);
2d552dd4	Hamish Coleman	conn->serial=INVALID_HANDLE_VALUE;
aaba0a4c	Hamish Coleman	conn->serialconnected=0;
62045e98	Hamish Coleman	}

2d552dd4	Hamish Coleman	/*
		* Given an active connection, force close its
		* serial port. waiting for all relevant resources
		*/
		void close_serial_connection(struct connection *conn) {
		if (!conn->active) {
		dprintf(1,"wconsd: closing closed connection %i\n",conn->id);
		return;
		}
3fa88c6f	Hamish Coleman	conn->option_runmenu=1;
2d552dd4	Hamish Coleman	close_com_port(conn);
		WaitForSingleObject(conn->serialThread,INFINITE);
		CloseHandle(conn->serialThread);
		conn->serialThread=NULL;
		}

4dcb97c2	Hamish Coleman	int wconsd_stop(int param1) {
		SetEvent(stopEvent);
		return 0;
		}
62045e98	Hamish Coleman
5ddf869b	Hamish Coleman	int libcli_test(struct cli_def cli, char command, char *argv[], int argc) {
		int i;
		cli_print(cli, "called %s with \"%s\"", __FUNCTION__, command);
		cli_print(cli, "%d arguments:", argc);
		for (i = 0; i < argc; i++)
		cli_print(cli, " %s", argv[i]);

		return CLI_OK;
		}


78d4c0b0	Hamish Coleman	/* Initialise wconsd: open a listening socket and the COM port, and
		* create lots of event objects. */
4dcb97c2	Hamish Coleman	int wconsd_init(int argc, char **argv) {
78d4c0b0	Hamish Coleman	struct sockaddr_in sin;
		WORD wVersionRequested;
		WSADATA wsaData;
		int err;

		/* Start up sockets */
		wVersionRequested = MAKEWORD( 2, 2 );

		err = WSAStartup( wVersionRequested, &wsaData );
		if ( err != 0 ) {
		/* Tell the user that we could not find a usable */
		/* WinSock DLL. */
		return 1;
		}

		/* Confirm that the WinSock DLL supports 2.2.*/
		/* Note that if the DLL supports versions greater */
		/* than 2.2 in addition to 2.2, it will still return */
		/* 2.2 in wVersion since that is the version we */
		/* requested. */

		if ( LOBYTE( wsaData.wVersion ) != 2 \|\|
		HIBYTE( wsaData.wVersion ) != 2 ) {
		/* Tell the user that we could not find a usable */
		/* WinSock DLL. */
		WSACleanup( );
		return 2;
		}

		/* The WinSock DLL is acceptable. Proceed. */

		// Create the event object used to signal service shutdown
		stopEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
		if (stopEvent==NULL) {
		return 3;
		}
		// Event objects for overlapped IO
		readEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
		if (readEvent==NULL) {
		return 6;
		}
		writeEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
		if (writeEvent==NULL) {
		return 7;
		}
		// Create the event object for socket operations
		listenSocketEvent = WSACreateEvent();
		if (listenSocketEvent==WSA_INVALID_EVENT) {
		return 8;
		}

306304a2	Hamish Coleman	if (gethostname((char *)hostname,sizeof(hostname))==SOCKET_ERROR) {
		return 1;
		}
		dprintf(1,"wconsd: Hostname is %s\n",hostname);

		host_entry=gethostbyname((char *)hostname);
		if (host_entry->h_addrtype==AF_INET) {
		dprintf(1,"wconsd: IP Address is %s\n",inet_ntoa ((struct in_addr )*host_entry->h_addr_list));
		/* FIXME - enumerate all the IP addresses from the list */
		} else {
		host_entry=0;
		return 0;
		}

78d4c0b0	Hamish Coleman	/* Create a socket to listen for connections. */
		memset(&sin,0,sizeof(sin));
		sin.sin_family=AF_INET;
62727af2	Hamish Coleman	sin.sin_port=htons(default_tcpport);
78d4c0b0	Hamish Coleman	ls=socket(AF_INET,SOCK_STREAM,0);
		if (ls==INVALID_SOCKET) {
		return 9;
		}
ef78cec5	Hamish Coleman	#ifndef MS_WINDOWS
		{
		int one=1;
		setsockopt(ls,SOL_SOCKET,SO_REUSEADDR,(void*)&one,sizeof(one));
		}
		#endif
78d4c0b0	Hamish Coleman	if (bind(ls,(struct sockaddr *)&sin,sizeof(sin))==SOCKET_ERROR) {
ef78cec5	Hamish Coleman	dprintf(1,"wconsd: wconsd_init: failed to bind socket\n");
78d4c0b0	Hamish Coleman	return 10;
		}
		if (listen(ls,1)==SOCKET_ERROR) {
		return 11;
		}
306304a2	Hamish Coleman	dprintf(1,"wconsd: listening on port %i\n",default_tcpport);

78d4c0b0	Hamish Coleman
		/* Mark the socket as non-blocking */
		if (WSAEventSelect(ls,listenSocketEvent,FD_ACCEPT)==SOCKET_ERROR) {
		return 12;
		}
4cb40453	Hamish Coleman
5ddf869b	Hamish Coleman	if (!(cli = cli_init())) {
		dprintf(1,"wconsd: wconsd_init: failed run cli_init\n");
		return 13;
		}
		cli_set_banner(cli, "wconsd serial to telnet");
		cli_set_hostname(cli, (char *)hostname);
		cli_set_idle_timeout(cli, 60);
		cli_register_command(cli, NULL, "test", libcli_test, PRIVILEGE_UNPRIVILEGED,
		MODE_EXEC, NULL);
		#if 0
		cli_set_auth_callback(cli, check_auth);
		cli_set_enable_callback(cli, check_enable);
		#endif

f3f4759e	Hamish Coleman	modules_init(cli);
5ddf869b	Hamish Coleman
78d4c0b0	Hamish Coleman	return 0;
		}

3eb633b1	Hamish Coleman	/*
479f1136	Hamish Coleman	* telnet option receiver state machine.
		* Called with the current char, it saves the intermediate state in the
		* conn struct.
		*
		* Returns 0 to indicate no echo of this char, or 0xff to indicate that the
		* char should be echoed.
3eb633b1	Hamish Coleman	*/
479f1136	Hamish Coleman	unsigned char process_telnet_option(struct connection*conn, unsigned char ch) {
		dprintf(2,"wconsd[%i]: debug option (0x%02x) 0x%02x\n",conn->id,conn->telnet_option,ch);

		switch (conn->telnet_option) {
		case 0: /* received nothing */
		if (ch==TELNET_OPTION_IAC) {
		conn->telnet_option=ch;
		return 0; /* dont echo */
997564ce	Hamish Coleman	}
479f1136	Hamish Coleman	return 0xff; /* ECHO */

		case TELNET_OPTION_IAC: /* recived IAC */
		switch(ch) {
		case 0xf0: /* suboption end */
		case 0xf1: /* NOP */
		case 0xf2: /* Data Mark */
		case 0xf5: /* abort output */
		case 0xf7: /* erase character */
		case 0xf8: /* erase line */
		case 0xf9: /* go ahead */
		dprintf(1,"wconsd[%i]: option IAC %i\n",conn->id,ch);
		conn->telnet_option=0;
		return 0; /* dont echo */

		case 0xf3: /* Break */
		if (conn->serialconnected) {
		dprintf(2,"wconsd[%i]: send break\n",conn->id);
		Sleep(1000);
		SetCommBreak(conn->serial);
		Sleep(1000);
		ClearCommBreak(conn->serial);
		}
		conn->telnet_option=0;
		return 0; /* dont echo */

		case 0xf4: /* Interrupt */
		conn->option_runmenu=1;
		conn->telnet_option=0;
		return 0; /* dont echo */

		case 0xf6: /* are you there */
		dprintf(1,"wconsd[%i]: option IAC AYT\n",conn->id);
		netprintf(conn,"yes\r\n");
		conn->telnet_option=0;
		return 0; /* dont echo */

		case TELNET_OPTION_SB:
		case TELNET_OPTION_WILL:
		case TELNET_OPTION_WONT:
		case TELNET_OPTION_DO:
		case TELNET_OPTION_DONT:
		conn->telnet_option=ch;
		return 0; /* dont echo */

		case 0xff: /* send ff */
		conn->telnet_option=0;
		return ch; /* ECHO */

		default:
		dprintf(1,"wconsd[%i]: option IAC %i invalid\n",conn->id,ch);
		conn->telnet_option=0;
		return 0; /* dont echo */
3eb633b1	Hamish Coleman	}
479f1136	Hamish Coleman
		case TELNET_OPTION_SB: /* received IAC SB 0xfa */
		conn->telnet_option=TELNET_OPTION_SBXX;
		conn->telnet_option_param=ch;
		return 0; /* dont echo */

		case TELNET_OPTION_WILL: /* received IAC WILL 0xfb */
		dprintf(2,"wconsd[%i]: option IAC WILL %i\n",conn->id,ch);
		conn->telnet_option=0;
		return 0; /* dont echo */
		case TELNET_OPTION_WONT: /* received IAC WONT 0xfc */
		dprintf(1,"wconsd[%i]: option IAC WONT %i\n",conn->id,ch);
		conn->telnet_option=0;
		return 0; /* dont echo */
		case TELNET_OPTION_DO: /* received IAC DO 0xfd */
		switch (ch) {
		case 0x00: /* Binary */
		dprintf(2,"wconsd[%i]: DO Binary\n",conn->id);
		conn->option_binary=1;
3eb633b1	Hamish Coleman	case 0x01: /* ECHO */
4cb40453	Hamish Coleman	dprintf(2,"wconsd[%i]: DO ECHO\n",conn->id);
3eb633b1	Hamish Coleman	conn->option_echo=1;
		break;
479f1136	Hamish Coleman	default:
		dprintf(2,"wconsd[%i]: option IAC DO %i\n",conn->id,ch);
3eb633b1	Hamish Coleman	break;
		}
479f1136	Hamish Coleman	conn->telnet_option=0;
		return 0; /* dont echo */
		case TELNET_OPTION_DONT: /* received IAC DONT 0xfe */
		switch (ch) {
		case 0x00: /* Binary */
		dprintf(2,"wconsd[%i]: DONT Binary\n",conn->id);
		conn->option_binary=0;
3eb633b1	Hamish Coleman	case 0x01: /* ECHO */
		dprintf(1,"wconsd[%i]: DONT ECHO\n",conn->id);
		conn->option_echo=0;
		break;
		default:
479f1136	Hamish Coleman	dprintf(2,"wconsd[%i]: option IAC DONT %i\n",conn->id,ch);
		break;
3eb633b1	Hamish Coleman	}
479f1136	Hamish Coleman	conn->telnet_option=0;
		return 0; /* dont echo */

3eb633b1	Hamish Coleman	default:
479f1136	Hamish Coleman	if (conn->telnet_option==TELNET_OPTION_SBXX) {
		/* received IAC SB x */
		int option = conn->telnet_option_param;

		if (ch==0) {
		/* IS */
		dprintf(1,"wconsd[%i]: option IAC SB %i IS\n",
		conn->id,option);
		/*
		* TODO - stay in telnet option mode while
		* absorbing the IS buffer
		*/
		conn->telnet_option=0;
		return 0; /* dont echo */
		} else if (ch>1) {
		/* error ? */
		dprintf(1,"wconsd[%i]: option IAC SB %i %i\n",
		conn->id,option,ch);
		conn->telnet_option=0;
		return 0; /* dont echo */
		}

		/* SEND */
		if (option == 5) {
		dprintf(1,"wconsd[%i]: option IAC SB 5 SEND\n",conn->id);
		/* FIXME - add option_binary */
		netprintf(conn,"%s%c%s%s%s",
		"\xff\xfa\x05",
		0,
		"\xfb\x05",
		conn->option_echo?"\xfb\x01":"",
		"\xff\xf0");
		conn->telnet_option=0;
		return 0; /* dont echo */
		} else {
		/* error ? */
		dprintf(1,"wconsd[%i]: option IAC SB %i %i\n",
		conn->id,option,ch);
		conn->telnet_option=0;
		return 0; /* dont echo */
		}
		}

		dprintf(1,"wconsd[%i]: invalid conn->telnet_option==%i \n",conn->id,conn->telnet_option);

3eb633b1	Hamish Coleman	}

		/* not normally reached */
		return 3;
		}

		/*
		* Wrap up all the crazy file writing process in a function
		*/
		int serial_writefile(struct connection conn,OVERLAPPED o,unsigned char *buf,int size) {
		DWORD wsize;

		if (!conn->serialconnected) {
		dprintf(1,"wconsd[%i]: serial_writefile but serial closed\n",conn->id);
		return 0;
		}

		if (!WriteFile(conn->serial,buf,size,&wsize,o)) {
		if (GetLastError()==ERROR_IO_PENDING) {
		// Wait for it...
		if (!GetOverlappedResult(conn->serial,o,&wsize,TRUE)) {
		dprintf(1,"wconsd[%i]: Error %d (overlapped) writing to COM port\n",conn->id,GetLastError());
		}
		} else {
		dprintf(1,"wconsd[%i]: Error %d writing to COM port\n",conn->id,GetLastError());
		}
		}
		if (wsize!=size) {
		dprintf(1,"wconsd[%i]: Eeek! WriteFile: wrote %d of %d\n",conn->id,wsize,size);
		}
		return wsize;
		}

78d4c0b0	Hamish Coleman	DWORD WINAPI wconsd_net_to_com(LPVOID lpParam)
		{
aaba0a4c	Hamish Coleman	struct connection * conn = (struct connection*)lpParam;
c0d1e8fe	Hamish Coleman	unsigned char buf[BUFSIZE];
3eb633b1	Hamish Coleman	unsigned char *pbuf;
		int bytes_to_scan;
		DWORD size;
78d4c0b0	Hamish Coleman	unsigned long zero=0;
		fd_set s;
aaba0a4c	Hamish Coleman	struct timeval tv;
78d4c0b0	Hamish Coleman	OVERLAPPED o={0};

4cb40453	Hamish Coleman	dprintf(1,"wconsd[%i]: debug: start wconsd_net_to_com\n",conn->id);
884971fc	Hamish Coleman
78d4c0b0	Hamish Coleman	o.hEvent = writeEvent;
f6cc8fbf	Hamish Coleman	while (conn->serialconnected) {
78d4c0b0	Hamish Coleman	/* There's a bug in some versions of Windows which leads
		* to recv() returning -1 and indicating error WSAEWOULDBLOCK,
		* even on a blocking socket. This select() is here to work
		* around that bug. */
aaba0a4c	Hamish Coleman	/*
		* These sockets are non-blocking, so I am unsure that the
		* above statement is still true
		*/
		FD_SET(conn->net,&s);
3eb633b1	Hamish Coleman	tv.tv_sec = 2;
aaba0a4c	Hamish Coleman	tv.tv_usec = 0;
		select(0,&s,NULL,NULL,&tv);
306304a2	Hamish Coleman	/* TODO - examine the retval for the select */
aaba0a4c	Hamish Coleman	size=recv(conn->net,(void*)&buf,BUFSIZE,0);
78d4c0b0	Hamish Coleman	if (size==0) {
aaba0a4c	Hamish Coleman	closesocket(conn->net);
		conn->net=INVALID_SOCKET;
		dprintf(1,"wconsd[%i]: wconsd_net_to_com size==0\n",conn->id);
f6cc8fbf	Hamish Coleman	return 0;
78d4c0b0	Hamish Coleman	}
		if (size==SOCKET_ERROR) {
306304a2	Hamish Coleman	int err = WSAGetLastError();
		switch (err) {
		case WSAEWOULDBLOCK:
		/* ignore */
3fa88c6f	Hamish Coleman	if (conn->option_keepalive) {
		netprintf(conn,"\xff\xf1");
		}
306304a2	Hamish Coleman	continue;
3fa88c6f	Hamish Coleman	case WSAECONNRESET:
		closesocket(conn->net);
		conn->net=INVALID_SOCKET;
479f1136	Hamish Coleman	return 0;
306304a2	Hamish Coleman	default:
		dprintf(1,"wconsd[%i]: net_to_com socket error (%i)\n",conn->id,err);
		/* General paranoia about blocking sockets */
		ioctlsocket(conn->net,FIONBIO,&zero);
		}
aaba0a4c	Hamish Coleman	continue;
78d4c0b0	Hamish Coleman	}
aaba0a4c	Hamish Coleman	conn->net_bytes_rx+=size;

3eb633b1	Hamish Coleman	/*
		* Scan for telnet options and process then remove them
		* This loop is reasonably fast if there are no options,
		* but recursively slow if there are options
479f1136	Hamish Coleman	*
		* TODO - if an option is mid packet, this could change
		* the semantics of processing at the wrong point
3eb633b1	Hamish Coleman	*/
		pbuf=buf;
		bytes_to_scan=size;
479f1136	Hamish Coleman	while(bytes_to_scan--) {
		/* TODO - use ->telnet_option \|\| 0xff to chose to call process_telnet_option */
		if(!process_telnet_option(conn,*pbuf)) {
		/* remove this byte from the buffer */
		memmove(pbuf,pbuf+1,bytes_to_scan);
		size--;
		continue;
3eb633b1	Hamish Coleman	}
479f1136	Hamish Coleman	pbuf++;
3eb633b1	Hamish Coleman	}

		/*
		* Scan for CR NUL sequences and uncook them
201f6e65	Hamish Coleman	* it also appears that I need to uncook CR LF sequences
3eb633b1	Hamish Coleman	*/
479f1136	Hamish Coleman	if (!conn->option_binary) {
		pbuf=buf;
		bytes_to_scan=size;
		while ((pbuf=memchr(pbuf,0x0d,bytes_to_scan))!=NULL) {
		pbuf++;
		if (pbuf!=0x00&&pbuf!=0x0a) {
		continue;
		}
3eb633b1	Hamish Coleman
479f1136	Hamish Coleman	bytes_to_scan = size-(pbuf-buf)+1;
		size -= 1;
		memmove(pbuf,pbuf+1,bytes_to_scan);
		}
		/* TODO - emulate cisco's ctrl-^,x sequence for exit to menu */
3eb633b1	Hamish Coleman	}

aaba0a4c	Hamish Coleman
3fa88c6f	Hamish Coleman	if (conn->option_runmenu) {
f6cc8fbf	Hamish Coleman	/*
		* If processing the telnet options has caused
		* runmenu to be set, we exit the loop here
		*/
3eb633b1	Hamish Coleman	return 0;
aaba0a4c	Hamish Coleman	}

		if (!conn->serialconnected) {
		dprintf(1,"wconsd[%i]: data to send, but serial closed\n",conn->id);
		continue;
		}

3eb633b1	Hamish Coleman	/*
		* we could check the return value to see if there was a
		* short write, but what would our options be?
		*/
		serial_writefile(conn,&o,buf,size);
78d4c0b0	Hamish Coleman	}
4cb40453	Hamish Coleman	dprintf(1,"wconsd[%i]: debug: finish wconsd_net_to_com\n",conn->id);
78d4c0b0	Hamish Coleman	return 0;
		}

		DWORD WINAPI wconsd_com_to_net(LPVOID lpParam)
		{
aaba0a4c	Hamish Coleman	struct connection * conn = (struct connection*)lpParam;
c0d1e8fe	Hamish Coleman	unsigned char buf[BUFSIZE];
78d4c0b0	Hamish Coleman	DWORD size;
		OVERLAPPED o={0};

		o.hEvent=readEvent;

4cb40453	Hamish Coleman	dprintf(1,"wconsd[%i]: debug: start wconsd_com_to_net\n",conn->id);
884971fc	Hamish Coleman
f6cc8fbf	Hamish Coleman	while (conn->serialconnected) {
aaba0a4c	Hamish Coleman	if (!ReadFile(conn->serial,buf,BUFSIZE,&size,&o)) {
78d4c0b0	Hamish Coleman	if (GetLastError()==ERROR_IO_PENDING) {
		// Wait for overlapped operation to complete
aaba0a4c	Hamish Coleman	if (!GetOverlappedResult(conn->serial,&o,&size,TRUE)) {
9b2f3609	Hamish Coleman	dprintf(1,"wconsd: Error %d (overlapped) reading from COM port\n",GetLastError());
78d4c0b0	Hamish Coleman	}
		} else {
aaba0a4c	Hamish Coleman	dprintf(1,"wconsd[%i]: Error %d reading from COM port\n",conn->id,GetLastError());
		conn->serialconnected=0;
		continue;
78d4c0b0	Hamish Coleman	}
		}
3eb633b1	Hamish Coleman	/* We might not have any data if the ReadFile timed out */
78d4c0b0	Hamish Coleman	if (size>0) {
f6cc8fbf	Hamish Coleman	if (send(conn->net,(void*)&buf,size,0)==-1) {
		dprintf(1,"wconsd[%i]: wconsd_com_to_net send failed\n",conn->id);
		return 0;
3eb633b1	Hamish Coleman	}
aaba0a4c	Hamish Coleman	conn->net_bytes_tx+=size;
78d4c0b0	Hamish Coleman	}
		}
4cb40453	Hamish Coleman	dprintf(1,"wconsd[%i]: debug: finish wconsd_com_to_net\n",conn->id);
78d4c0b0	Hamish Coleman	return 0;
62045e98	Hamish Coleman	}

f6cc8fbf	Hamish Coleman	void cmd_open(struct connection *conn) {
		dprintf(1,"wconsd[%i]: debug: start cmd_open\n",conn->id);
4991f810	Hamish Coleman
		if (!conn->serialconnected) {
		if (open_com_port(conn)) {
		netprintf(conn,"error: cannot open port\r\n\n");
f6cc8fbf	Hamish Coleman	return;
4991f810	Hamish Coleman	}
		}

		netprintf(conn,"\r\n\n");

		PurgeComm(conn->serial,PURGE_RXCLEAR\|PURGE_RXABORT);
		if (conn->serialThread==NULL) {
		/* we might already have a com_to_net thread */
		conn->serialThread=CreateThread(NULL,0,wconsd_com_to_net,conn,0,NULL);
		}

f6cc8fbf	Hamish Coleman	conn->option_runmenu=0;
		wconsd_net_to_com(conn);
4991f810	Hamish Coleman	conn->option_runmenu=1;
		}

884971fc	Hamish Coleman	void send_help(struct connection *conn) {
aaba0a4c	Hamish Coleman	netprintf(conn,
4cb40453	Hamish Coleman	"NOTE: the commands will be changing in the next version\r\n"
		"\r\n"
		"available commands:\r\n"
aaba0a4c	Hamish Coleman	"\r\n"
479f1136	Hamish Coleman	"binary - toggle the binary comms mode\r\n"
4cb40453	Hamish Coleman	"close - Stop serial communications\r\n"
		"copyright - Print the copyright notice\r\n"
		"data - Set number of data bits\r\n"
		"help - This guff\r\n"
		"kill_conn - Stop a given connection's serial communications\r\n"
479f1136	Hamish Coleman	"keepalive - toggle the generation of keepalive packets\r\n"
4cb40453	Hamish Coleman	"open - Connect or resume communications with a serial port\r\n"
		"parity - Set the serial parity\r\n"
		"port - Set serial port number\r\n"
		"quit - exit from this session\r\n"
		"show_conn_table - Show the connections table\r\n"
		"speed - Set serial port speed\r\n"
		"status - Show current serial port status\r\n"
		"stop - Set number of stop bits\r\n"
9c5b7bd0	Hamish Coleman	"\r\n"
		"see http://wob.zot.org/2/wiki/wconsd for more information\r\n"
4cb40453	Hamish Coleman	"\r\n");
53110989	Hamish Coleman	}

c7c4a6f7	Hamish Coleman	void show_status(struct connection* conn) {
		/* print the status to the net connection */

884971fc	Hamish Coleman	netprintf(conn, "status:\r\n\n"
4cb40453	Hamish Coleman	" port=%d speed=%d data=%d parity=%d stop=%d\r\n",
c7c4a6f7	Hamish Coleman	com_port, com_speed, com_data, com_parity, com_stop);

aaba0a4c	Hamish Coleman	if(conn->serialconnected) {
4cb40453	Hamish Coleman	netprintf(conn, " state=open\r\n\n");
c7c4a6f7	Hamish Coleman	} else {
4cb40453	Hamish Coleman	netprintf(conn, " state=closed\r\n\n");
c7c4a6f7	Hamish Coleman	}
3fa88c6f	Hamish Coleman	netprintf(conn," connectionid=%i hostname=%s\r\n",conn->id,hostname);
479f1136	Hamish Coleman	netprintf(conn," echo=%i binary=%i keepalive=%i\r\n",
		conn->option_echo,conn->option_binary,conn->option_keepalive);
3fa88c6f	Hamish Coleman	netprintf(conn,"\r\n");
c7c4a6f7	Hamish Coleman	}

		/*
		* I thought that I would need this a lot, but it turns out that there
		* was a lot of duplicated code
		*/
884971fc	Hamish Coleman	int check_atoi(char p,int old_value,struct connection conn,char *error) {
c7c4a6f7	Hamish Coleman	if (!p) {
884971fc	Hamish Coleman	netprintf(conn,error);
c7c4a6f7	Hamish Coleman	return old_value;
		}

		return atoi(p);
53110989	Hamish Coleman	}

2d552dd4	Hamish Coleman	void process_menu_line(struct connectionconn, char line) {
d51f658a	Hamish Coleman	char *command;
		char *parameter1;

c7c4a6f7	Hamish Coleman	/*
		* FIXME - non re-entrant code
		*
4450bbca	Hamish Coleman	* my windows build environment does not have strtok_r
c7c4a6f7	Hamish Coleman	* and thus I am running these two strtok as close as possible.
		* I am definitely not going to re-invent the wheel with my own
		* code.
		*/
d51f658a	Hamish Coleman	command = strtok(line," ");
		parameter1 = strtok(NULL," ");

		if (!strcmp(command, "help") \|\| !strcmp(command, "?")) {
		// help
884971fc	Hamish Coleman	send_help(conn);
d51f658a	Hamish Coleman	} else if (!strcmp(command, "status")) {
		// status
c7c4a6f7	Hamish Coleman	show_status(conn);
d51f658a	Hamish Coleman	} else if (!strcmp(command, "copyright")) { // copyright
884971fc	Hamish Coleman	netprintf(conn,
c7c4a6f7	Hamish Coleman	" Copyright (c) 2008 by Hamish Coleman <hamish@zot.org>\r\n"
		" 2003 by Benjamin Schweizer <gopher at h07 dot org>\r\n"
		" 1998 by Stephen Early <Stephen.Early@cl.cam.ac.uk>\r\n"
		"\r\n"
		"\r\n"
		" This program is free software; you can redistribute it and/or modify\r\n"
		" it under the terms of the GNU General Public License as published by\r\n"
		" the Free Software Foundation; either version 2 of the License, or\r\n"
		" (at your option) any later version.\r\n"
		"\r\n"
		" This program is distributed in the hope that it will be useful,\r\n"
		" but WITHOUT ANY WARRANTY; without even the implied warranty of\r\n"
		" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r\n"
		" GNU General Public License for more details.\r\n"
		"\r\n"
		" You should have received a copy of the GNU General Public License\r\n"
		" along with this program; if not, write to the Free Software\r\n"
		" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\r\n"
		"\n");
d51f658a	Hamish Coleman	} else if (!strcmp(command, "port")) { // port
884971fc	Hamish Coleman	int new = check_atoi(parameter1,com_port,conn,"must specify a port\r\n");
c7c4a6f7	Hamish Coleman
		if (new >= 1 && new <= 16) {
		com_port=new;
d51f658a	Hamish Coleman	}
		} else if (!strcmp(command, "speed")) { // speed
884971fc	Hamish Coleman	com_speed = check_atoi(parameter1,com_port,conn,"must specify a speed\r\n");
d51f658a	Hamish Coleman	} else if (!strcmp(command, "data")) { // data
4cb40453	Hamish Coleman	if (!parameter1) {
		netprintf(conn,"Please specify number of data bits {5,6,7,8}\r\n");
		return;
		}
d51f658a	Hamish Coleman	if (!strcmp(parameter1, "5")) {
		com_data=5;
		} else if (!strcmp(parameter1, "6")) {
		com_data=6;
		} else if (!strcmp(parameter1, "7")) {
		com_data=7;
		} else if (!strcmp(parameter1, "8")) {
		com_data=8;
		}
c7c4a6f7	Hamish Coleman	show_status(conn);
d51f658a	Hamish Coleman	} else if (!strcmp(command, "parity")) { // parity
4cb40453	Hamish Coleman	if (!parameter1) {
		netprintf(conn,"Please specify the parity {no,even,odd,mark,space}\r\n");
		return;
		}
d51f658a	Hamish Coleman	if (!strcmp(parameter1, "no") \|\| !strcmp(parameter1, "0")) {
		com_parity=NOPARITY;
		} else if (!strcmp(parameter1, "even") \|\| !strcmp(parameter1, "2")) {
		com_parity=EVENPARITY;
		} else if (!strcmp(parameter1, "odd") \|\| !strcmp(parameter1, "1")) {
		com_parity=ODDPARITY;
		} else if (!strcmp(parameter1, "mark")) {
		com_parity=MARKPARITY;
		} else if (!strcmp(parameter1, "space")) {
		com_parity=SPACEPARITY;
		}
c7c4a6f7	Hamish Coleman	show_status(conn);
d51f658a	Hamish Coleman	} else if (!strcmp(command, "stop")) {
4cb40453	Hamish Coleman	if (!parameter1) {
		netprintf(conn,"Please specify the number of stop bits {1,1.5,2}\r\n");
		return;
		}
d51f658a	Hamish Coleman	if (!strcmp(parameter1, "one") \|\| !strcmp(parameter1, "1")) {
		com_stop=ONESTOPBIT;
		} else if (!strcmp(parameter1, "one5") \|\| !strcmp(parameter1, "1.5")) {
		com_stop=ONE5STOPBITS;
		} else if (!strcmp(parameter1, "two") \|\| !strcmp(parameter1, "2")) {
		com_stop=TWOSTOPBITS;
		}
c7c4a6f7	Hamish Coleman	show_status(conn);
d51f658a	Hamish Coleman	} else if (!strcmp(command, "open")) { // open
4cb40453	Hamish Coleman	int new = check_atoi(parameter1,com_port,conn,"Opening default port\r\n");
c7c4a6f7	Hamish Coleman
		if (new >= 1 && new <= 16) {
		com_port=new;
d51f658a	Hamish Coleman	}
f6cc8fbf	Hamish Coleman	cmd_open(conn);
d51f658a	Hamish Coleman	} else if (!strcmp(command, "close")) { // close
2d552dd4	Hamish Coleman	close_serial_connection(conn);
884971fc	Hamish Coleman	netprintf(conn,"info: actual com port closed\r\n\n");
b0f1897b	Hamish Coleman	} else if (!strcmp(command, "quit")) {
		// quit the connection
3fa88c6f	Hamish Coleman	conn->option_runmenu=0;
aaba0a4c	Hamish Coleman	closesocket(conn->net);
		conn->net=INVALID_SOCKET;
2d552dd4	Hamish Coleman	return;
3fa88c6f	Hamish Coleman	} else if (!strcmp(command, "keepalive")) {
		conn->option_keepalive=!conn->option_keepalive;
		return;
479f1136	Hamish Coleman	} else if (!strcmp(command, "binary")) {
		conn->option_binary=!conn->option_binary;
		return;
884971fc	Hamish Coleman	} else if (!strcmp(command, "show_conn_table")) {
		int i;
		netprintf(conn,
f6cc8fbf	Hamish Coleman	"Flags: A - Active Slot, S - Serial active,\r\n"
479f1136	Hamish Coleman	" M - Run Menu, B - Binary transmission, E - Echo enabled,\r\n"
		" K - Telnet Keepalives, * - This connection\r\n"
3fa88c6f	Hamish Coleman	"\r\n");
08ceb73b	Hamish Coleman	netprintf(conn,
f6cc8fbf	Hamish Coleman	"s flags id mThr net serial serialTh netrx nettx peer address\r\n");
3fa88c6f	Hamish Coleman	netprintf(conn,
f6cc8fbf	Hamish Coleman	"- ------ -- ---- ---- ------ -------- ----- ----- ------------\r\n");
884971fc	Hamish Coleman	for (i=0;i<MAXCONNECTIONS;i++) {
f6cc8fbf	Hamish Coleman	netprintf(conn,"%i%c%c%c%c%c%c%c %2i %4i ",
3fa88c6f	Hamish Coleman	i,
		&connection[i]==conn?'*':' ',
		connection[i].active?'A':' ',
		connection[i].serialconnected?'S':' ',
		connection[i].option_runmenu?'M':' ',
479f1136	Hamish Coleman	connection[i].option_binary?'B':' ',
3fa88c6f	Hamish Coleman	connection[i].option_echo?'E':' ',
		connection[i].option_keepalive?'K':' ',
		connection[i].id,

		connection[i].menuThread);
f6cc8fbf	Hamish Coleman	netprintf(conn,"%4i ", connection[i].net);

3fa88c6f	Hamish Coleman	if (connection[i].serialconnected) {
		netprintf(conn,"%6i %8i ",
		connection[i].serial,
		connection[i].serialThread);
		} else {
		netprintf(conn," ");
		}
		netprintf(conn, "%5i %5i ",
		connection[i].net_bytes_rx,
		connection[i].net_bytes_tx);
		if (connection[i].sa) {
		/* FIXME - IPv4 Specific */
		netprintf(conn,"%s:%i",
		inet_ntoa(((struct sockaddr_in*)connection[i].sa)->sin_addr),
		htons(((struct sockaddr_in*)connection[i].sa)->sin_port));
		}
		netprintf(conn, "\r\n");
884971fc	Hamish Coleman	}
2d552dd4	Hamish Coleman	} else if (!strcmp(command, "kill_conn")) {
		int connid = check_atoi(parameter1,0,conn,"must specify a connection id\r\n");
		if (connid==0 \|\| connid>next_connection_id) {
		netprintf(conn,"Connection ID %i out of range\r\n",connid);
		return;
		}

		int i=0;
		while(connection[i].id!=connid && i<MAXCONNECTIONS) {
		i++;
		}
		if (i>=MAXCONNECTIONS) {
		netprintf(conn,"Connection ID %i not found\r\n",connid);
		return;
		}
997564ce	Hamish Coleman	netprintf(&connection[i],"Serial Connection Closed by Connection ID %i\r\n",conn->id);
2d552dd4	Hamish Coleman	close_serial_connection(&connection[i]);
		netprintf(conn,"Connection ID %i serial port closed\r\n",connid);
5ddf869b	Hamish Coleman	} else if (!strcmp(command, "menu")) {
		cli_loop(cli,conn->net);
c7c4a6f7	Hamish Coleman	} else {
		/* other, unknown commands */
4cb40453	Hamish Coleman	netprintf(conn,"\r\nInvalid Command: '%s'\r\n\r\n",line);
d51f658a	Hamish Coleman	}
53110989	Hamish Coleman	}

4cb40453	Hamish Coleman	void show_prompt(struct connection *conn) {
		netprintf(conn,"%s> ",hostname);
		}

2d552dd4	Hamish Coleman	void run_menu(struct connection * conn) {
08ceb73b	Hamish Coleman	unsigned char buf[BUFSIZE+5]; /* ensure there is room for our kludge telnet options */
		unsigned char line[MAXLEN];
62045e98	Hamish Coleman	DWORD size, linelen=0;
		WORD i;

		unsigned long zero=0;
89312c37	Hamish Coleman	fd_set set_read;
306304a2	Hamish Coleman	struct timeval tv;
53110989	Hamish Coleman
479f1136	Hamish Coleman	unsigned char last_ch;
		unsigned char ch;

08ceb73b	Hamish Coleman	/* IAC WILL ECHO */
		/* IAC WILL suppress go ahead */
		/* IAC WILL status */
201f6e65	Hamish Coleman	/* IAC WONT linemode */
		netprintf(conn,"\xff\xfb\x01\xff\xfb\x03\xff\xfb\x05\xff\xfc\x22");
08ceb73b	Hamish Coleman
aaba0a4c	Hamish Coleman	netprintf(conn,"\r\nwconsd serial port server (version %s)\r\n\r\n",VERSION);
884971fc	Hamish Coleman	send_help(conn);
4cb40453	Hamish Coleman	show_prompt(conn);
c7c4a6f7	Hamish Coleman
89312c37	Hamish Coleman	FD_ZERO(&set_read);
f6cc8fbf	Hamish Coleman	while (conn->option_runmenu) {
89312c37	Hamish Coleman	FD_SET(conn->net,&set_read);
306304a2	Hamish Coleman	tv.tv_sec = 2;
		tv.tv_usec = 0;
		select(conn->net+1,&set_read,NULL,NULL,&tv);
		/* TODO - examine the retval for the select */
c7c4a6f7	Hamish Coleman	size=recv(conn->net,(void*)&buf,BUFSIZE,0);
08ceb73b	Hamish Coleman
62045e98	Hamish Coleman	if (size==0) {
c7c4a6f7	Hamish Coleman	closesocket(conn->net);
		conn->net=INVALID_SOCKET;
2d552dd4	Hamish Coleman	return;
62045e98	Hamish Coleman	}
		if (size==SOCKET_ERROR) {
306304a2	Hamish Coleman	int err = WSAGetLastError();
		switch (err) {
		case WSAEWOULDBLOCK:
		/* ignore */
3fa88c6f	Hamish Coleman	if (conn->option_keepalive) {
		netprintf(conn,"\xff\xf1");
		}
306304a2	Hamish Coleman	continue;
3fa88c6f	Hamish Coleman	case WSAECONNRESET:
		closesocket(conn->net);
		conn->net=INVALID_SOCKET;
		return;
306304a2	Hamish Coleman	default:
		dprintf(1,"wconsd[%i]: run_menu socket error (%i)\n",conn->id,WSAGetLastError());
		/* General paranoia about blocking sockets */
		ioctlsocket(conn->net,FIONBIO,&zero);
		}
53110989	Hamish Coleman	continue;
62045e98	Hamish Coleman	}
884971fc	Hamish Coleman	conn->net_bytes_rx+=size;
62045e98	Hamish Coleman
53110989	Hamish Coleman	for (i = 0; i < size; i++) {
479f1136	Hamish Coleman	last_ch=ch;
		ch = buf[i];

		/* TODO - remove the second call to process_telnet_option */
		if (conn->telnet_option) {
		/* We are in the middle of handling an option */
		process_telnet_option(conn,ch);
		/*
		* return value ignored, since we dont care to
		* print any telnet option values in the menu.
		*/
b9a4e090	Hamish Coleman	continue;
479f1136	Hamish Coleman	}
		if (ch==0) {
		/*
		* NULLs could occur as the second char in a
		* CR NUL telnet sequence
		*/
		continue;
		} else if (ch==127 \|\| ch==8) {
b9a4e090	Hamish Coleman	// backspace
53110989	Hamish Coleman	if (linelen > 0) {
884971fc	Hamish Coleman	netprintf(conn,"\x08 \x08");
53110989	Hamish Coleman	linelen--;
		} else {
c7c4a6f7	Hamish Coleman	/* if the linebuf is empty, ring the bell */
884971fc	Hamish Coleman	netprintf(conn,"\x07");
53110989	Hamish Coleman	}
		continue;
479f1136	Hamish Coleman	} else if (ch==0x0d \|\| ch==0x0a) {
b9a4e090	Hamish Coleman	// detected cr or lf

479f1136	Hamish Coleman	if (last_ch == 0x0d && ch==0x0a) {
		/* skip the second char in CR LF */
		continue;
b9a4e090	Hamish Coleman	}

08ceb73b	Hamish Coleman	if (conn->option_echo)
		/* echo the endofline */
		netprintf(conn,"\r\n");
53110989	Hamish Coleman
0bcbd4d3	Hamish Coleman	if (linelen!=0) {
		line[linelen]=0; // ensure string is terminated
c7c4a6f7	Hamish Coleman
2d552dd4	Hamish Coleman	process_menu_line(conn,(char*)line);
3fa88c6f	Hamish Coleman	if (!conn->option_runmenu) {
c7c4a6f7	Hamish Coleman	/* exiting the menu.. */
2d552dd4	Hamish Coleman	return;
0bcbd4d3	Hamish Coleman	}
53110989	Hamish Coleman	}

4cb40453	Hamish Coleman	show_prompt(conn);
53110989	Hamish Coleman	linelen=0;
b9a4e090	Hamish Coleman	continue;
479f1136	Hamish Coleman	} else if (ch<0x20) {
08ceb73b	Hamish Coleman	/* ignore other ctrl chars */
		continue;
479f1136	Hamish Coleman	} else if (ch==TELNET_OPTION_IAC) {
		/* start a telnet option packet */
		process_telnet_option(conn,ch);
3eb633b1	Hamish Coleman	/*
479f1136	Hamish Coleman	* no possible return values, since IAC is
		* just the beginning of a telnet packet
3eb633b1	Hamish Coleman	*/
b9a4e090	Hamish Coleman	continue;
53110989	Hamish Coleman	} else {
		// other chars
0bcbd4d3	Hamish Coleman
53110989	Hamish Coleman	if (linelen < MAXLEN - 1) {
479f1136	Hamish Coleman	line[linelen] = ch;
53110989	Hamish Coleman	linelen++;
08ceb73b	Hamish Coleman	if (conn->option_echo) {
479f1136	Hamish Coleman	netprintf(conn,"%c",ch); /* echo */
08ceb73b	Hamish Coleman	}
53110989	Hamish Coleman	} else {
884971fc	Hamish Coleman	netprintf(conn,"\x07"); /* linebuf full bell */
62045e98	Hamish Coleman	}
b9a4e090	Hamish Coleman	continue;
62045e98	Hamish Coleman	}
		}
		}
c7c4a6f7	Hamish Coleman
		/* not reached */
78d4c0b0	Hamish Coleman	}

ef78cec5	Hamish Coleman	DWORD WINAPI thread_new_connection(LPVOID lpParam) {
c7c4a6f7	Hamish Coleman	struct connection * conn = (struct connection*)lpParam;
ef78cec5	Hamish Coleman
f6cc8fbf	Hamish Coleman	dprintf(1,"wconsd[%i]: debug: start thread_new_connection loop\n",conn->id);
		run_menu(conn);
ef78cec5	Hamish Coleman
c7c4a6f7	Hamish Coleman	/* cleanup */
884971fc	Hamish Coleman	dprintf(1,"wconsd[%i]: connection closing\n",conn->id);

c7c4a6f7	Hamish Coleman	/* TODO print bytecounts */
		/* maybe close file descriptors? */
884971fc	Hamish Coleman	shutdown(conn->net,SD_BOTH);
		closesocket(conn->net);
3eb633b1	Hamish Coleman
2d552dd4	Hamish Coleman	close_serial_connection(conn);
3eb633b1	Hamish Coleman
884971fc	Hamish Coleman	conn->active=0;
ef78cec5	Hamish Coleman
aaba0a4c	Hamish Coleman	/* TODO - who closes menuThread ? */
ef78cec5	Hamish Coleman	return 0;
		}

4dcb97c2	Hamish Coleman	int wconsd_main(int param1)
78d4c0b0	Hamish Coleman	{
3eb633b1	Hamish Coleman	HANDLE wait_array[2];
78d4c0b0	Hamish Coleman	BOOL run=TRUE;
		DWORD o;
		SOCKET as;
c0d1e8fe	Hamish Coleman	unsigned long zero=0;
78d4c0b0	Hamish Coleman
ef78cec5	Hamish Coleman	struct sockaddr_in sa;
		int salen;

		int i;
aaba0a4c	Hamish Coleman	int count;
ef78cec5	Hamish Coleman
		/* clear out any bogus data in the connections table */
		for (i=0;i<MAXCONNECTIONS;i++) {
884971fc	Hamish Coleman	connection[i].active = 0;
ef78cec5	Hamish Coleman	}

78d4c0b0	Hamish Coleman	/* Main loop: wait for a connection, service it, repeat
		* until signalled that the service is terminating */
		wait_array[0]=stopEvent;
		wait_array[1]=listenSocketEvent;

		while (run) {
4cb40453	Hamish Coleman	dprintf(1,"wconsd: debug: start wconsd_main loop\n");
bd5605dd	Hamish Coleman
3eb633b1	Hamish Coleman	o=WaitForMultipleObjects(2,wait_array,FALSE,INFINITE);
78d4c0b0	Hamish Coleman
		switch (o-WAIT_OBJECT_0) {
ef78cec5	Hamish Coleman	case 0: /* stopEvent */
78d4c0b0	Hamish Coleman	run=FALSE;
		ResetEvent(stopEvent);
		break;
ef78cec5	Hamish Coleman	case 1: /* listenSocketEvent */
		/* There is an incoming connection */
78d4c0b0	Hamish Coleman	WSAResetEvent(listenSocketEvent);
ef78cec5	Hamish Coleman	salen = sizeof(sa);
		as=accept(ls,(struct sockaddr*)&sa,&salen);

		if (as==INVALID_SOCKET) {
		break;
		}
53110989	Hamish Coleman
4cb40453	Hamish Coleman	dprintf(1,"wconsd: new connection from %s\n",
		inet_ntoa(sa.sin_addr));
53110989	Hamish Coleman
ef78cec5	Hamish Coleman	/* search for an empty connection slot */
aaba0a4c	Hamish Coleman	i=next_connection_slot%MAXCONNECTIONS;
		count=0;
		while(connection[i].active && count<MAXCONNECTIONS) {
		count++;
		i = (i+1)%MAXCONNECTIONS;
ef78cec5	Hamish Coleman	}
		if (i==MAXCONNECTIONS) {
		dprintf(1,"wconsd: connection table overflow\n");
		/* FIXME - properly reject the incoming connection */
		/* for now, just close the socket */
		closesocket(as);
		break;
78d4c0b0	Hamish Coleman	}
aaba0a4c	Hamish Coleman	next_connection_slot = (next_connection_slot+1)%MAXCONNECTIONS;
884971fc	Hamish Coleman	connection[i].active=1; /* mark this entry busy */
		connection[i].id = next_connection_id++;
ef78cec5	Hamish Coleman	connection[i].menuThread=NULL;
		connection[i].net=as;
aaba0a4c	Hamish Coleman	connection[i].serialconnected=0;
ef78cec5	Hamish Coleman	connection[i].serial=INVALID_HANDLE_VALUE;
		connection[i].serialThread=NULL;
3fa88c6f	Hamish Coleman	connection[i].option_runmenu=1; /* start in the menu */
479f1136	Hamish Coleman	connection[i].option_binary=0;
08ceb73b	Hamish Coleman	connection[i].option_echo=0;
3fa88c6f	Hamish Coleman	connection[i].option_keepalive=0;
ef78cec5	Hamish Coleman	connection[i].net_bytes_rx=0;
		connection[i].net_bytes_tx=0;
479f1136	Hamish Coleman	connection[i].telnet_option=0;
		connection[i].telnet_option_param=0;
ef78cec5	Hamish Coleman
3fa88c6f	Hamish Coleman	if (connection[i].sa) {
		/* Do lazy de-allocation so that the info is
		* still visible to show conn table */
		free(connection[i].sa);
		}
		if ((connection[i].sa=malloc(salen))==NULL) {
		dprintf(1,"wconsd[%i]: malloc failed\n",
		connection[i].id);
		} else {
		memcpy(connection[i].sa,&sa,salen);
		}

4cb40453	Hamish Coleman	dprintf(1,"wconsd[%i]: accepted new connection in slot %i\n",connection[i].id,i);
ef78cec5	Hamish Coleman

		/* we successfully accepted the connection */

aaba0a4c	Hamish Coleman	ioctlsocket(connection[i].net,FIONBIO,&zero);
ef78cec5	Hamish Coleman
		connection[i].menuThread = CreateThread(NULL,0,thread_new_connection,&connection[i],0,NULL);

78d4c0b0	Hamish Coleman	break;
		default:
		run=FALSE; // Stop the service - I want to get off!
		break;
		}
		}

aaba0a4c	Hamish Coleman	/* TODO - look through the connection table and close everything */
78d4c0b0	Hamish Coleman
		closesocket(ls);
		WSACleanup();
4dcb97c2	Hamish Coleman	return 0;
78d4c0b0	Hamish Coleman	}

		static void usage(void)
		{
4cb40453	Hamish Coleman	printf("Usage: wconsd [-i pathname \| -r \| -d \| -p port ]\n");
		printf("Just start with no options to start server\n");
4dcb97c2	Hamish Coleman	printf(" -i install service 'wconsd'\n");
78d4c0b0	Hamish Coleman	printf(" -r remove service 'wconsd'\n");
4cb40453	Hamish Coleman	printf(" -d run wconsd in foreground mode\n");
		printf(" -p port listen on the given port in foreground mode\n");
78d4c0b0	Hamish Coleman	}

		int main(int argc, char **argv)
		{
		DWORD err;
62727af2	Hamish Coleman	int console_application=0;
e592f8f7	Hamish Coleman
62727af2	Hamish Coleman	// debug info for when I test this as a service
		dprintf(1,"wconsd: started with argc==%i\n",argc);

62045e98	Hamish Coleman	if (argc==1 \|\| argc==0) {
62727af2	Hamish Coleman
		// assume that our messages are going to the debug log
53110989	Hamish Coleman	debug_mode=0;
62727af2	Hamish Coleman
e592f8f7	Hamish Coleman	err = SCM_Start(&sd);
		if (err!=SVC_CONSOLE) {
		return 0;
78d4c0b0	Hamish Coleman	}
62727af2	Hamish Coleman
		// fall through and try running as a command-line application
		console_application=1;
78d4c0b0	Hamish Coleman	}

53110989	Hamish Coleman	// We are running in debug mode (or any other command-line mode)
		debug_mode=1;

306304a2	Hamish Coleman	dprintf(1,"\n"
		"wconsd: Serial Console server (version %s)\n",VERSION);
		dprintf(1,
		" (see http://wob.zot.org/2/wiki/wconsd for more info)\n\n");
62727af2	Hamish Coleman
c2484981	Hamish Coleman	if (argc>1) {
62727af2	Hamish Coleman	if (strcmp(argv[1],"-i")==0) {
6f662bc7	Hamish Coleman	/* request service installation */
		char *path = SCM_Install(&sd);
		if (!path) {
		printf("Service installation failed\n");
		return 1;
		}
		printf("Service '%s' installed, binary path '%s'\n",sd.name,path);
		printf("You should now start the service using the service manager.\n");
62727af2	Hamish Coleman	return 0;
		} else if (strcmp(argv[1],"-r")==0) {
		// request service removal
6f662bc7	Hamish Coleman	if (SCM_Remove(&sd)==0) {
		printf("Deleted service '%s'\n",sd.name);
		} else {
		printf("Service removal failed\n");
		return 1;
		}
62727af2	Hamish Coleman	return 0;
780d7607	Hamish Coleman	} else if (strcmp(argv[1],"-p")==0) {
		console_application=1;
479f1136	Hamish Coleman	if (argc>2) {
		default_tcpport = atoi(argv[2]);
		}
62727af2	Hamish Coleman	} else if (strcmp(argv[1],"-d")==0) {
		console_application=1;
479f1136	Hamish Coleman	if (argc>2) {
		dprintf_level = atoi(argv[2]);
		}
62727af2	Hamish Coleman	} else {
78d4c0b0	Hamish Coleman	usage();
		return 1;
		}
62727af2	Hamish Coleman	}

		// if we have decided to run as a console app..
		if (console_application) {
78d4c0b0	Hamish Coleman	int r;
4cb40453	Hamish Coleman	dprintf(1,"wconsd: Foreground mode\n");
4dcb97c2	Hamish Coleman
e592f8f7	Hamish Coleman	r=wconsd_init(argc,argv);
78d4c0b0	Hamish Coleman	if (r!=0) {
e592f8f7	Hamish Coleman	dprintf(1,"wconsd: wconsd_init failed, return code %d\n",r);
78d4c0b0	Hamish Coleman	return 1;
		}
4dcb97c2	Hamish Coleman	wconsd_main(0);
62727af2	Hamish Coleman	}

		return 0;
78d4c0b0	Hamish Coleman	}

Project

General

Profile

wconsd

root/wconsd.c @ 66a63de2