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/* main.cpp */

/* Synchronet main/telnet server thread and related functions */

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
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 * Copyright 2007 Rob Swindell - http://www.synchro.net/copyright.html		*
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 *																			*
 * 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.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
 *																			*
 * You are encouraged to submit any modifications (preferably in Unix diff	*
 * format) via e-mail to mods@synchro.net									*
 *																			*
 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

#include "sbbs.h"
#include "ident.h"
#include "telnet.h" 

#ifdef __unix__
	#include <sys/un.h>
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	#ifndef SUN_LEN
		#define SUN_LEN(su) \
	        (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
	#endif
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#endif

//---------------------------------------------------------------------------

#define TELNET_SERVER "Synchronet Telnet Server"
#define STATUS_WFC	"Listening"

#define TIMEOUT_THREAD_WAIT		60			// Seconds (was 15)
#define IO_THREAD_BUF_SIZE	   	20000		// Bytes

// Globals
#ifdef _WIN32
	HANDLE		exec_mutex=NULL;
	HINSTANCE	hK32=NULL;

	#if defined(_DEBUG) && defined(_MSC_VER)
			HANDLE	debug_log=INVALID_HANDLE_VALUE;
		   _CrtMemState mem_chkpoint;
	#endif // _DEBUG && _MSC_VER

#endif // _WIN32

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#ifdef USE_CRYPTLIB
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	#define SSH_END()	if(ssh)	cryptDestroySession(sbbs->ssh_session);
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#else
	#define	SSH_END()
#endif

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time_t	uptime=0;
DWORD	served=0;

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static	DWORD node_threads_running=0;
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static	ulong thread_count=0;
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char 	lastuseron[LEN_ALIAS+1];  /* Name of user last online */
RingBuf* node_inbuf[MAX_NODES];
SOCKET	spy_socket[MAX_NODES];
#ifdef __unix__
SOCKET	uspy_socket[MAX_NODES];	  /* UNIX domain spy sockets */
#endif
SOCKET	node_socket[MAX_NODES];
static	SOCKET telnet_socket=INVALID_SOCKET;
static	SOCKET rlogin_socket=INVALID_SOCKET;
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#ifdef USE_CRYPTLIB
static	SOCKET ssh_socket=INVALID_SOCKET;
#endif
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static	sbbs_t*	sbbs=NULL;
static	scfg_t	scfg;
static	char *	text[TOTAL_TEXT];
static	WORD	first_node;
static	WORD	last_node;
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static	bool	terminate_server=false;
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static	str_list_t recycle_semfiles;
static	str_list_t shutdown_semfiles;
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#ifdef _THREAD_SUID_BROKEN
int	thread_suid_broken=TRUE;			/* NPTL is no longer broken */
#endif
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extern "C" {

static bbs_startup_t* startup=NULL;

static void status(char* str)
{
	if(startup!=NULL && startup->status!=NULL)
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	    startup->status(startup->cbdata,str);
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}

static void update_clients()
{
	if(startup!=NULL && startup->clients!=NULL)
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		startup->clients(startup->cbdata,node_threads_running);
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}

void client_on(SOCKET sock, client_t* client, BOOL update)
{
	if(startup!=NULL && startup->client_on!=NULL)
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		startup->client_on(startup->cbdata,TRUE,sock,client,update);
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}

static void client_off(SOCKET sock)
{
	if(startup!=NULL && startup->client_on!=NULL)
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		startup->client_on(startup->cbdata,FALSE,sock,NULL,FALSE);
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}

static void thread_up(BOOL setuid)
{
	thread_count++;
	if(startup!=NULL && startup->thread_up!=NULL)
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		startup->thread_up(startup->cbdata,TRUE,setuid);
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}

static void thread_down()
{
	if(thread_count>0)
		thread_count--;
	if(startup!=NULL && startup->thread_up!=NULL)
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		startup->thread_up(startup->cbdata,FALSE,FALSE);
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}

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int lputs(int level, char* str)
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{
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	if(startup==NULL || startup->lputs==NULL || str==NULL)
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    	return(0);

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    return(startup->lputs(startup->cbdata,level,str));
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}

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int lprintf(int level, char *fmt, ...)
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{
	va_list argptr;
	char sbuf[1024];

    va_start(argptr,fmt);
    vsnprintf(sbuf,sizeof(sbuf),fmt,argptr);
	sbuf[sizeof(sbuf)-1]=0;
    va_end(argptr);
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    return(lputs(level,sbuf));
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}

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int eprintf(int level, char *fmt, ...)
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{
	va_list argptr;
	char sbuf[1024];

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    if(startup==NULL || startup->event_lputs==NULL)
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        return(0);

    va_start(argptr,fmt);
    vsnprintf(sbuf,sizeof(sbuf),fmt,argptr);
	sbuf[sizeof(sbuf)-1]=0;
    va_end(argptr);
	strip_ctrl(sbuf);
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    return(startup->event_lputs(level,sbuf));
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}

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SOCKET open_socket(int type, const char* protocol)
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{
	SOCKET	sock;
	char	error[256];

	sock=socket(AF_INET, type, IPPROTO_IP);
	if(sock!=INVALID_SOCKET && startup!=NULL && startup->socket_open!=NULL) 
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		startup->socket_open(startup->cbdata,TRUE);
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	if(sock!=INVALID_SOCKET && set_socket_options(&scfg, sock, protocol, error, sizeof(error)))
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		lprintf(LOG_ERR,"%04d !ERROR %s",sock,error);
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	return(sock);
}

SOCKET accept_socket(SOCKET s, SOCKADDR* addr, socklen_t* addrlen)
{
	SOCKET	sock;

	sock=accept(s,addr,addrlen);
	if(sock!=INVALID_SOCKET && startup!=NULL && startup->socket_open!=NULL) 
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		startup->socket_open(startup->cbdata,TRUE);
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	return(sock);
}

int close_socket(SOCKET sock)
{
	int		result;

	if(sock==INVALID_SOCKET || sock==0)
		return(0);

	shutdown(sock,SHUT_RDWR);	/* required on Unix */
	result=closesocket(sock);
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	if(startup!=NULL && startup->socket_open!=NULL)
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		startup->socket_open(startup->cbdata,FALSE);
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	if(result!=0 && ERROR_VALUE!=ENOTSOCK)
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		lprintf(LOG_ERR,"!ERROR %d closing socket %d",ERROR_VALUE,sock);
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	return(result);
}


u_long resolve_ip(char *addr)
{
	HOSTENT*	host;
	char*		p;

	if(*addr==0)
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		return((u_long)INADDR_NONE);
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	for(p=addr;*p;p++)
		if(*p!='.' && !isdigit(*p))
			break;
	if(!(*p))
		return(inet_addr(addr));
	if((host=gethostbyname(addr))==NULL) 
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		return((u_long)INADDR_NONE);
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	return(*((ulong*)host->h_addr_list[0]));
}

} /* extern "C" */

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#ifdef _WINSOCKAPI_

WSADATA WSAData;
#define SOCKLIB_DESC WSAData.szDescription
static BOOL WSAInitialized=FALSE;

static BOOL winsock_startup(void)
{
	int		status;             /* Status Code */

    if((status = WSAStartup(MAKEWORD(1,1), &WSAData))==0) {
		lprintf(LOG_INFO,"%s %s",WSAData.szDescription, WSAData.szSystemStatus);
		WSAInitialized=TRUE;
		return(TRUE);
	}

    lprintf(LOG_ERR,"!WinSock startup ERROR %d", status);
	return(FALSE);
}

#else /* No WINSOCK */

#define winsock_startup()	(TRUE)
#define SOCKLIB_DESC NULL

#endif

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DLLEXPORT void DLLCALL sbbs_srand()
{
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	DWORD seed = time(NULL) ^ (DWORD)GetCurrentThreadId();

#if defined(HAS_DEV_RANDOM) && defined(RANDOM_DEV)
	int     rf;

	if((rf=open(RANDOM_DEV, O_RDONLY))!=-1) {
		read(rf, &seed, sizeof(seed));
		close(rf);
	}
#endif

 	srand(seed);
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	sbbs_random(10);	/* Throw away first number */
}

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int DLLCALL sbbs_random(int n)
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{
	return(xp_random(n));
}

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#ifdef JAVASCRIPT

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static js_server_props_t js_server_props;

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JSBool	
DLLCALL js_CreateArrayOfStrings(JSContext* cx, JSObject* parent, const char* name, char* str[],uintN flags)
{
	JSObject*	array;
	JSString*	js_str;
	jsval		val;
	size_t		i;
	jsuint		len=0;
		
	if(JS_GetProperty(cx,parent,name,&val) && val!=JSVAL_VOID)
		array=JSVAL_TO_OBJECT(val);
	else
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		if((array=JS_NewArrayObject(cx, 0, NULL))==NULL)	/* Assertion here, in _heap_alloc_dbg, June-21-2004 */
			return(JS_FALSE);								/* Caused by nntpservice.js? */
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	if(!JS_DefineProperty(cx, parent, name, OBJECT_TO_JSVAL(array)
		,NULL,NULL,flags))
		return(JS_FALSE);

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	if(!JS_GetArrayLength(cx, array, &len))
		return(JS_FALSE);

	for(i=0;str[i]!=NULL;i++) {
		if((js_str = JS_NewStringCopyZ(cx, str[i]))==NULL)
			break;
		val = STRING_TO_JSVAL(js_str);
		if(!JS_SetElement(cx, array, len+i, &val))
			break;
	}

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	return(JS_TRUE);
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}

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/* Convert from Synchronet-specific jsSyncMethodSpec to JSAPI's JSFunctionSpec */
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JSBool
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DLLCALL js_DescribeSyncObject(JSContext* cx, JSObject* obj, const char* str, int ver)
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{
	JSString* js_str = JS_NewStringCopyZ(cx, str);

	if(js_str==NULL)
		return(JS_FALSE);

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	if(ver < 10000)		/* auto convert 313 to 31300 */
		ver*=100;

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	return(JS_DefineProperty(cx,obj,"_description"
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			,STRING_TO_JSVAL(js_str),NULL,NULL,JSPROP_READONLY)
		&& JS_DefineProperty(cx,obj,"_ver"
			,INT_TO_JSVAL(ver),NULL,NULL,JSPROP_READONLY));
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}

JSBool
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DLLCALL js_DescribeSyncConstructor(JSContext* cx, JSObject* obj, const char* str)
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{
	JSString* js_str = JS_NewStringCopyZ(cx, str);

	if(js_str==NULL)
		return(JS_FALSE);

	return(JS_DefineProperty(cx,obj,"_constructor"
		,STRING_TO_JSVAL(js_str),NULL,NULL,JSPROP_READONLY));
}

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#ifdef BUILD_JSDOCS
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static const char* method_array_name = "_method_list";
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static const char* propver_array_name = "_property_ver_list";
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/*
 * from jsatom.c:
 * Keep this in sync with jspubtd.h -- an assertion below will insist that
 * its length match the JSType enum's JSTYPE_LIMIT limit value.
 */
static const char *js_type_str[] = {
    "void",			// changed from "undefined"
    "object",
    "function",
    "string",
    "number",
    "boolean",
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	"array",
	"alias",
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	"undefined",
	"null"
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};

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JSBool
DLLCALL js_DefineSyncProperties(JSContext *cx, JSObject *obj, jsSyncPropertySpec* props)
{
	uint		i;
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	long		ver;
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	jsval		val;
	jsuint		len=0;
	JSObject*	array;

	if((array=JS_NewArrayObject(cx, 0, NULL))==NULL)
		return(JS_FALSE);

	if(!JS_DefineProperty(cx, obj, propver_array_name, OBJECT_TO_JSVAL(array)
		,NULL,NULL,JSPROP_READONLY))
		return(JS_FALSE);

	for(i=0;props[i].name;i++) {
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		if(!JS_DefinePropertyWithTinyId(cx, obj, /* Never reserve any "slots" for properties */
			props[i].name,props[i].tinyid, JSVAL_VOID, NULL, NULL, props[i].flags|JSPROP_SHARED))
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			return(JS_FALSE);
		if(props[i].flags&JSPROP_ENUMERATE) {	/* No need to version invisible props */
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			if((ver=props[i].ver) < 10000)		/* auto convert 313 to 31300 */
				ver*=100;
			val = INT_TO_JSVAL(ver);
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			if(!JS_SetElement(cx, array, len++, &val))
				return(JS_FALSE);
		}
	}

	return(JS_TRUE);
}

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JSBool 
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DLLCALL js_DefineSyncMethods(JSContext* cx, JSObject* obj, jsSyncMethodSpec *funcs, BOOL append)
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{
	int			i;
	jsuint		len=0;
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	long		ver;
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	jsval		val;
	JSObject*	method;
	JSObject*	method_array;
	JSString*	js_str;

	/* Return existing method_list array if it's already been created */
	if(JS_GetProperty(cx,obj,method_array_name,&val) && val!=JSVAL_VOID)
		method_array=JSVAL_TO_OBJECT(val);
	else
		if((method_array=JS_NewArrayObject(cx, 0, NULL))==NULL) 
			return(JS_FALSE);

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	if(!JS_DefineProperty(cx, obj, method_array_name, OBJECT_TO_JSVAL(method_array)
		, NULL, NULL, 0))
		return(JS_FALSE);

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	if(append)
		if(!JS_GetArrayLength(cx, method_array, &len))
			return(JS_FALSE);

	for(i=0;funcs[i].name;i++) {

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		if(!JS_DefineFunction(cx, obj, funcs[i].name, funcs[i].call, funcs[i].nargs, 0))
			return(JS_FALSE);
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		if(funcs[i].type==JSTYPE_ALIAS)
			continue;

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		method = JS_NewObject(cx, NULL, NULL, method_array);	/* exception here June-7-2003 */
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		if(method==NULL)
			return(JS_FALSE);

		if(funcs[i].name!=NULL) {
			if((js_str=JS_NewStringCopyZ(cx,funcs[i].name))==NULL)
				return(JS_FALSE);
			val = STRING_TO_JSVAL(js_str);
			JS_SetProperty(cx, method, "name", &val);
		}

		val = INT_TO_JSVAL(funcs[i].nargs);
		if(!JS_SetProperty(cx, method, "nargs", &val))
			return(JS_FALSE);

		if((js_str=JS_NewStringCopyZ(cx,js_type_str[funcs[i].type]))==NULL)
			return(JS_FALSE);
		val = STRING_TO_JSVAL(js_str);
		JS_SetProperty(cx, method, "type", &val);

		if(funcs[i].args!=NULL) {
			if((js_str=JS_NewStringCopyZ(cx,funcs[i].args))==NULL)
				return(JS_FALSE);
			val = STRING_TO_JSVAL(js_str);
			JS_SetProperty(cx, method, "args", &val);
		}

		if(funcs[i].desc!=NULL) { 
			if((js_str=JS_NewStringCopyZ(cx,funcs[i].desc))==NULL)
				return(JS_FALSE);
			val = STRING_TO_JSVAL(js_str);
			JS_SetProperty(cx, method, "desc", &val);
		}

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		if(funcs[i].ver) {
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			if((ver=funcs[i].ver) < 10000)		/* auto convert 313 to 31300 */
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				ver*=100;
			val = INT_TO_JSVAL(ver);
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			JS_SetProperty(cx,method, "ver", &val);
		}

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		val=OBJECT_TO_JSVAL(method);
		if(!JS_SetElement(cx, method_array, len+i, &val))
			return(JS_FALSE);
	}

	return(JS_TRUE);
}

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/*
 * Always resolve all here since
 * 1) We'll always be enumerating anyways
 * 2) The speed penalty won't be seen in production code anyways
 */
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JSBool
DLLCALL js_SyncResolve(JSContext* cx, JSObject* obj, char *name, jsSyncPropertySpec* props, jsSyncMethodSpec* funcs, jsConstIntSpec* consts, int flags)
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{
	JSBool	ret=JS_TRUE;

	if(props)
		if(!js_DefineSyncProperties(cx, obj, props))
			ret=JS_FALSE;
		
	if(funcs)
		if(!js_DefineSyncMethods(cx, obj, funcs))
			ret=JS_FALSE;

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	if(consts)
		if(!js_DefineConstIntegers(JSContext* cx, JSObject* obj, consts, flags)

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	return(ret);
}

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#else // NON-JSDOCS
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JSBool
DLLCALL js_DefineSyncProperties(JSContext *cx, JSObject *obj, jsSyncPropertySpec* props)
{
	uint i;

	for(i=0;props[i].name;i++) 
		if(!JS_DefinePropertyWithTinyId(cx, obj, 
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			props[i].name,props[i].tinyid, JSVAL_VOID, NULL, NULL, props[i].flags|JSPROP_SHARED))
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			return(JS_FALSE);

	return(JS_TRUE);
}


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JSBool 
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DLLCALL js_DefineSyncMethods(JSContext* cx, JSObject* obj, jsSyncMethodSpec *funcs, BOOL append)
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{
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	uint i;
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	for(i=0;funcs[i].name;i++)
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		if(!JS_DefineFunction(cx, obj, funcs[i].name, funcs[i].call, funcs[i].nargs, 0))
			return(JS_FALSE);
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	return(JS_TRUE);
}

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JSBool
DLLCALL js_SyncResolve(JSContext* cx, JSObject* obj, char *name, jsSyncPropertySpec* props, jsSyncMethodSpec* funcs, jsConstIntSpec* consts, int flags)
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{
	uint i;
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	jsval	val;
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	if(props) {
		for(i=0;props[i].name;i++) {
			if(name==NULL || strcmp(name, props[i].name)==0) {
				if(!JS_DefinePropertyWithTinyId(cx, obj, 
						props[i].name,props[i].tinyid, JSVAL_VOID, NULL, NULL, props[i].flags|JSPROP_SHARED))
					return(JS_FALSE);
				if(name)
					return(JS_TRUE);
			}
		}
	}
	if(funcs) {
		for(i=0;funcs[i].name;i++) {
			if(name==NULL || strcmp(name, funcs[i].name)==0) {
				if(!JS_DefineFunction(cx, obj, funcs[i].name, funcs[i].call, funcs[i].nargs, 0))
					return(JS_FALSE);
				if(name)
					return(JS_TRUE);
			}
		}
	}
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	if(consts) {
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		for(i=0;consts[i].name;i++) {
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			if(name==NULL || strcmp(name, consts[i].name)==0) {
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	        	if(!JS_NewNumberValue(cx, consts[i].val, &val))
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					return(JS_FALSE);

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				if(!JS_DefineProperty(cx, obj, consts[i].name, val ,NULL, NULL, flags))
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					return(JS_FALSE);

				if(name)
					return(JS_TRUE);
			}
		}
	}
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	return(JS_TRUE);
}

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#endif

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/* This is a stream-lined version of JS_DefineConstDoubles */
JSBool
DLLCALL js_DefineConstIntegers(JSContext* cx, JSObject* obj, jsConstIntSpec* ints, int flags)
{
	uint	i;
	jsval	val;

	for(i=0;ints[i].name;i++) {
        if(!JS_NewNumberValue(cx, ints[i].val, &val))
			return(JS_FALSE);

		if(!JS_DefineProperty(cx, obj, ints[i].name, val ,NULL, NULL, flags))
			return(JS_FALSE);
	}
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	return(JS_TRUE);
}

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char*
DLLCALL js_ValueToStringBytes(JSContext* cx, jsval val, size_t* len)
{
	JSString* str;
	
	if((str=JS_ValueToString(cx, val))==NULL)
		return(NULL);

	if(len!=NULL)
		*len = JS_GetStringLength(str);

	return(JS_GetStringBytes(str));
}

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static JSBool
js_log(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
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    uintN		i=0;
	int32		level=LOG_INFO;
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    JSString*	str=NULL;
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	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

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	if(argc > 1 && JSVAL_IS_NUMBER(argv[i]))
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		JS_ValueToInt32(cx,argv[i++],&level);

    for(; i<argc; i++) {
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		if((str=JS_ValueToString(cx, argv[i]))==NULL)
		    return(JS_FALSE);
		if(sbbs->online==ON_LOCAL) {
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			if(startup!=NULL && startup->event_lputs!=NULL)
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				startup->event_lputs(level,JS_GetStringBytes(str));
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		} else
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			lputs(level,JS_GetStringBytes(str));
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	}
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	if(str==NULL)
		*rval = JSVAL_VOID;
	else
		*rval = STRING_TO_JSVAL(str);
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    return(JS_TRUE);
}

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static JSBool
js_read(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	uchar*		buf;
	int32		len=128;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

	if(argc)
		JS_ValueToInt32(cx,argv[0],&len);

	if((buf=(uchar*)malloc(len))==NULL)
		return(JS_TRUE);

	len=RingBufRead(&sbbs->inbuf,buf,len);

	if(len>0)
		*rval = STRING_TO_JSVAL(JS_NewStringCopyN(cx,(char*)buf,len));

	free(buf);
	return(JS_TRUE);
}

static JSBool
js_readln(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	char*		buf;
	int32		len=128;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

	if(argc)
		JS_ValueToInt32(cx,argv[0],&len);

	if((buf=(char*)malloc(len))==NULL)
		return(JS_TRUE);

	len=sbbs->getstr(buf,len,K_NONE);

	if(len>0)
		*rval = STRING_TO_JSVAL(JS_NewStringCopyZ(cx,buf));

	free(buf);
	return(JS_TRUE);
}

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static JSBool
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js_write(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
    uintN		i;
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    JSString*	str=NULL;
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	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

    for (i = 0; i < argc; i++) {
		if((str=JS_ValueToString(cx, argv[i]))==NULL)
		    return(JS_FALSE);
		if(sbbs->online==ON_LOCAL)
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			eprintf(LOG_INFO,"%s",JS_GetStringBytes(str));
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		else
			sbbs->bputs(JS_GetStringBytes(str));
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	}

	if(str==NULL)
		*rval = JSVAL_VOID;
	else
		*rval = STRING_TO_JSVAL(str);
    return(JS_TRUE);
}

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static JSBool
js_write_raw(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
    uintN		i;
    char*	str=NULL;
	size_t		len;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

    for (i = 0; i < argc; i++) {
		if((str=js_ValueToStringBytes(cx, argv[i], &len))==NULL)
		    return(JS_FALSE);
		sbbs->putcom(str, len);
	}

    return(JS_TRUE);
}

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static JSBool
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js_writeln(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

	js_write(cx,obj,argc,argv,rval);
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	if(sbbs->online==ON_REMOTE)
		sbbs->bputs(crlf);

    return(JS_TRUE);
}

static JSBool
js_printf(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	char*		p;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

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	if((p = js_sprintf(cx, 0, argc, argv))==NULL) {
		JS_ReportError(cx,"js_sprintf failed");
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		return(JS_FALSE);
	}

	if(sbbs->online==ON_LOCAL)
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		eprintf(LOG_INFO,"%s",p);
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	else
		sbbs->bputs(p);
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	*rval = STRING_TO_JSVAL(JS_NewStringCopyZ(cx, p));

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	js_sprintf_free(p);
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    return(JS_TRUE);
}

static JSBool
js_alert(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
    JSString *	str;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

	if((str=JS_ValueToString(cx, argv[0]))==NULL)
	    return(JS_FALSE);

	sbbs->attr(sbbs->cfg.color[clr_err]);
	sbbs->bputs(JS_GetStringBytes(str));
	sbbs->attr(LIGHTGRAY);
	sbbs->bputs(crlf);

    return(JS_TRUE);
}

static JSBool
js_confirm(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
    JSString *	str;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

	if((str=JS_ValueToString(cx, argv[0]))==NULL)
	    return(JS_FALSE);

	*rval = BOOLEAN_TO_JSVAL(sbbs->yesno(JS_GetStringBytes(str)));
	return(JS_TRUE);
}

static JSBool
js_prompt(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	char		instr[81];
    JSString *	prompt;
    JSString *	str;
	sbbs_t*		sbbs;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return(JS_FALSE);

	if((prompt=JS_ValueToString(cx, argv[0]))==NULL)
	    return(JS_FALSE);

	if(argc>1) {
		if((str=JS_ValueToString(cx, argv[1]))==NULL)
		    return(JS_FALSE);
		SAFECOPY(instr,JS_GetStringBytes(str));
	} else
		instr[0]=0;

	sbbs->bprintf("\1n\1y\1h%s\1w: ",JS_GetStringBytes(prompt));

	if(!sbbs->getstr(instr,sizeof(instr)-1,K_EDIT)) {
		*rval = JSVAL_NULL;
		return(JS_TRUE);
	}

	if((str=JS_NewStringCopyZ(cx, instr))==NULL)
	    return(JS_FALSE);

	*rval = STRING_TO_JSVAL(str);
    return(JS_TRUE);
}

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static jsSyncMethodSpec js_global_functions[] = {
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	{"log",				js_log,				1,	JSTYPE_STRING,	JSDOCSTR("[level,] value [,value]")
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	,JSDOCSTR("add a line of text to the server and/or system log, "
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		"<i>values</i> are typically string constants or variables, "
		"<i>level</i> is the debug level/priority (default: <tt>LOG_INFO</tt>)")
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	},
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	{"read",			js_read,			0,	JSTYPE_STRING,	JSDOCSTR("[count]")
	,JSDOCSTR("read up to count characters from input stream")
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	},
	{"readln",			js_readln,			0,	JSTYPE_STRING,	JSDOCSTR("[count]")
	,JSDOCSTR("read a single line, up to count characters, from input stream")
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	},
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	{"write",			js_write,			0,	JSTYPE_VOID,	JSDOCSTR("value [,value]")
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	,JSDOCSTR("send one or more values (typically strings) to the server output")
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	},
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	{"write_raw",			js_write_raw,			0,	JSTYPE_VOID,	JSDOCSTR("value [,value]")
	,JSDOCSTR("send a stream of bytes (possibly containing NULLs or special control code sequences) to the server output")
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	},
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	{"print",			js_writeln,			0,	JSTYPE_ALIAS },
    {"writeln",         js_writeln,         0,	JSTYPE_VOID,	JSDOCSTR("value [,value]")
	,JSDOCSTR("send a line of text to the console or event log with automatic line termination (CRLF), "
		"<i>values</i> are typically string constants or variables (AKA print)")
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	},
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    {"printf",          js_printf,          1,	JSTYPE_STRING,	JSDOCSTR("string format [,value][,value]")
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	,JSDOCSTR("print a formatted string - <small>CAUTION: for experienced C programmers ONLY</small>")
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	},	
	{"alert",			js_alert,			1,	JSTYPE_VOID,	JSDOCSTR("value")
	,JSDOCSTR("print an alert message (ala client-side JS)")
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	},
	{"prompt",			js_prompt,			1,	JSTYPE_STRING,	JSDOCSTR("[value]")
	,JSDOCSTR("displays a prompt (<i>value</i>) and returns a string of user input (ala clent-side JS)")
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	},
	{"confirm",			js_confirm,			1,	JSTYPE_BOOLEAN,	JSDOCSTR("value")
	,JSDOCSTR("displays a Yes/No prompt and returns <i>true</i> or <i>false</i> "
		"based on users confirmation (ala client-side JS)")
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	},
    {0}
};

static void
js_ErrorReporter(JSContext *cx, const char *message, JSErrorReport *report)
{
	char	line[64];
	char	file[MAX_PATH+1];
	sbbs_t*	sbbs;
	const char*	warning;

	if((sbbs=(sbbs_t*)JS_GetContextPrivate(cx))==NULL)
		return;
	
	if(report==NULL) {
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		lprintf(LOG_ERR,"!JavaScript: %s", message);
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		return;
    }

	if(report->filename)
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		SAFEPRINTF(file," %s",report->filename);
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	else
		file[0]=0;

	if(report->lineno)
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		SAFEPRINTF(line," line %d",report->lineno);
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	else
		line[0]=0;

	if(JSREPORT_IS_WARNING(report->flags)) {
		if(JSREPORT_IS_STRICT(report->flags))
			warning="strict warning";
		else
			warning="warning";
	} else
		warning=nulstr;

	if(sbbs->online==ON_LOCAL) 
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		eprintf(LOG_ERR,"!JavaScript %s%s%s: %s",warning,file,line,message);
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	else {
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		lprintf(LOG_ERR,"!JavaScript %s%s%s: %s",warning,file,line,message);
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		sbbs->bprintf("!JavaScript %s%s%s: %s\r\n",warning,file,line,message);
	}
}

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bool sbbs_t::js_init(ulong* stack_frame)
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{
	char		node[128];

    if(cfg.node_num)
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    	SAFEPRINTF(node,"Node %d",cfg.node_num);
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    else
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    	SAFECOPY(node,client_name);
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	if(startup->js.max_bytes==0)			startup->js.max_bytes=JAVASCRIPT_MAX_BYTES;
	if(startup->js.cx_stack==0)				startup->js.cx_stack=JAVASCRIPT_CONTEXT_STACK;

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	lprintf(LOG_DEBUG,"%s JavaScript: Creating runtime: %lu bytes"
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		,node,startup->js.max_bytes);
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	if((js_runtime = JS_NewRuntime(startup->js.max_bytes))==NULL)
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		return(false);

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	lprintf(LOG_DEBUG,"%s JavaScript: Initializing context (stack: %lu bytes)"
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		,node,startup->js.cx_stack);
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    if((js_cx = JS_NewContext(js_runtime, startup->js.cx_stack))==NULL)
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		return(false);
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	memset(&js_branch,0,sizeof(js_branch));
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	js_branch.limit = startup->js.branch_limit;
	js_branch.gc_interval = startup->js.gc_interval;
	js_branch.yield_interval = startup->js.yield_interval;
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	js_branch.terminated = &terminated;
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	js_branch.auto_terminate = TRUE;
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	bool success=false;

	do {

		JS_SetErrorReporter(js_cx, js_ErrorReporter);

		JS_SetContextPrivate(js_cx, this);	/* Store a pointer to sbbs_t instance */

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		/* Global Objects (including system, js, client, Socket, MsgBase, File, User, etc. */
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		if((js_glob=js_CreateCommonObjects(js_cx, &scfg, &cfg, js_global_functions
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					,uptime, startup->host_name, SOCKLIB_DESC	/* system */
					,&js_branch									/* js */
					,&client, client_socket						/* client */
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					,&js_server_props							/* server */
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			))==NULL)
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			break;

		/* BBS Object */
		if(js_CreateBbsObject(js_cx, js_glob)==NULL)
			break;

		/* Console Object */
		if(js_CreateConsoleObject(js_cx, js_glob)==NULL)
			break;

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		if(startup->js.thread_stack) {
			ulong stack_limit;

#if JS_STACK_GROWTH_DIRECTION > 0
			stack_limit=((ulong)stack_frame)+startup->js.thread_stack;
#else
			stack_limit=((ulong)stack_frame)-startup->js.thread_stack;
#endif
			JS_SetThreadStackLimit(js_cx, stack_limit);

			lprintf(LOG_DEBUG,"%s JavaScript: Thread stack limit: %lu bytes"
				,node, startup->js.thread_stack);
		}

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		success=true;

	} while(0);

	if(!success) {
		JS_DestroyContext(js_cx);
		js_cx=NULL;
		return(false);
	}

	return(true);
}

void sbbs_t::js_create_user_objects(void)
{
	if(js_cx==NULL)
		return;

	if(!js_CreateUserObjects(js_cx, js_glob, &cfg, &useron, NULL, subscan)) 
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		lprintf(LOG_ERR,"!JavaScript ERROR creating user objects");
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}

#endif	/* JAVASCRIPT */

static BYTE* telnet_interpret(sbbs_t* sbbs, BYTE* inbuf, int inlen,
  									BYTE* outbuf, int& outlen)
{
	BYTE*   first_iac=NULL;
	BYTE*	first_cr=NULL;
	int 	i;

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	if(inlen<1) {
		outlen=0;
		return(inbuf);	// no length? No interpretation
	}

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    first_iac=(BYTE*)memchr(inbuf, TELNET_IAC, inlen);

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	if(!(sbbs->telnet_mode&TELNET_MODE_GATE) 
		&& sbbs->telnet_remote_option[TELNET_BINARY_TX]!=TELNET_WILL
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		&& !(sbbs->console&CON_RAW_IN)) {
		if(sbbs->telnet_last_rxch==CR)
			first_cr=inbuf;
		else
			first_cr=(BYTE*)memchr(inbuf, CR, inlen);
	}

    if(!sbbs->telnet_cmdlen	&& first_iac==NULL && first_cr==NULL) {
        outlen=inlen;
        return(inbuf);	// no interpretation needed
    }

    if(first_iac!=NULL || first_cr!=NULL) {
		if(first_iac!=NULL && (first_cr==NULL || first_iac<first_cr))
   			outlen=first_iac-inbuf;
		else
			outlen=first_cr-inbuf;
	    memcpy(outbuf, inbuf, outlen);
    } else
    	outlen=0;

    for(i=outlen;i<inlen;i++) {
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		if(!(sbbs->telnet_mode&TELNET_MODE_GATE) 
			&& sbbs->telnet_remote_option[TELNET_BINARY_TX]!=TELNET_WILL
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			&& !(sbbs->console&CON_RAW_IN)) {
			if(sbbs->telnet_last_rxch==CR
				&& (inbuf[i]==LF || inbuf[i]==0)) { // CR/LF or CR/NUL, ignore 2nd char
#if 0 /* Debug CR/LF problems */
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				lprintf(LOG_INFO,"Node %d CR/%02Xh detected and ignored"
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					,sbbs->cfg.node_num, inbuf[i]);
#endif
				sbbs->telnet_last_rxch=inbuf[i];
				continue;
			}
			sbbs->telnet_last_rxch=inbuf[i];
		}

        if(inbuf[i]==TELNET_IAC && sbbs->telnet_cmdlen==1) { /* escaped 255 */
            sbbs->telnet_cmdlen=0;
            outbuf[outlen++]=TELNET_IAC;
            continue;
        }
        if(inbuf[i]==TELNET_IAC || sbbs->telnet_cmdlen) {
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			if(sbbs->telnet_cmdlen<sizeof(sbbs->telnet_cmd))
				sbbs->telnet_cmd[sbbs->telnet_cmdlen++]=inbuf[i];
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			uchar command	= sbbs->telnet_cmd[1];
			uchar option	= sbbs->telnet_cmd[2];

			if(sbbs->telnet_cmdlen>=2 && command==TELNET_SB) {
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				if(inbuf[i]==TELNET_SE 
					&& sbbs->telnet_cmd[sbbs->telnet_cmdlen-2]==TELNET_IAC) {
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					if(startup->options&BBS_OPT_DEBUG_TELNET)
						lprintf(LOG_DEBUG,"Node %d %s Telnet sub-negotiation command: %s"
	                		,sbbs->cfg.node_num
							,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
							,telnet_opt_desc(option));

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					/* sub-option terminated */
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					if(option==TELNET_TERM_TYPE
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						&& sbbs->telnet_cmd[3]==TELNET_TERM_IS) {
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						sprintf(sbbs->terminal,"%.*s",(int)sbbs->telnet_cmdlen-6,sbbs->telnet_cmd+4);
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						lprintf(LOG_DEBUG,"Node %d %s telnet terminal type: %s"
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	                		,sbbs->cfg.node_num
							,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
							,sbbs->terminal);
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					} else if(option==TELNET_TERM_SPEED
						&& sbbs->telnet_cmd[3]==TELNET_TERM_IS) {
						char speed[128];
						sprintf(speed,"%.*s",(int)sbbs->telnet_cmdlen-6,sbbs->telnet_cmd+4);
						lprintf(LOG_DEBUG,"Node %d %s telnet terminal speed: %s"
	                		,sbbs->cfg.node_num
							,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
							,speed);
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						sbbs->cur_rate=atoi(speed);
						sbbs->cur_cps=sbbs->cur_rate/10;
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					} else if(option==TELNET_SEND_LOCATION) {
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						safe_snprintf(sbbs->telnet_location
							,sizeof(sbbs->telnet_location)
							,"%.*s",(int)sbbs->telnet_cmdlen-5,sbbs->telnet_cmd+3);
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						lprintf(LOG_DEBUG,"Node %d %s telnet location: %s"
	                		,sbbs->cfg.node_num
							,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
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							,sbbs->telnet_location);
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					} else if(option==TELNET_NEGOTIATE_WINDOW_SIZE) {
						long cols = (sbbs->telnet_cmd[3]<<8) | sbbs->telnet_cmd[4];
						long rows = (sbbs->telnet_cmd[5]<<8) | sbbs->telnet_cmd[6];
						lprintf(LOG_DEBUG,"Node %d %s telnet window size: %ux%u"
	                		,sbbs->cfg.node_num
							,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
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							,cols
							,rows);
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						if(rows && !sbbs->useron.rows)	/* auto-detect rows */
							sbbs->rows=rows;
						if(cols)
							sbbs->cols=cols;

					} else if(startup->options&BBS_OPT_DEBUG_TELNET)
            			lprintf(LOG_DEBUG,"Node %d %s unsupported telnet sub-negotiation cmd: %s"
	                		,sbbs->cfg.node_num
							,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
                			,telnet_opt_desc(option));
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					sbbs->telnet_cmdlen=0;
				}
			}
            else if(sbbs->telnet_cmdlen==2 && inbuf[i]<TELNET_WILL) {
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				if(startup->options&BBS_OPT_DEBUG_TELNET)
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            		lprintf(LOG_DEBUG,"Node %d %s telnet cmd: %s"
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	                	,sbbs->cfg.node_num
						,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
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                		,telnet_cmd_desc(option));
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                sbbs->telnet_cmdlen=0;
            }
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            else if(sbbs->telnet_cmdlen>=3) {	/* telnet option negotiation */

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				if(startup->options&BBS_OPT_DEBUG_TELNET)
					lprintf(LOG_DEBUG,"Node %d %s telnet cmd: %s %s"
						,sbbs->cfg.node_num
						,sbbs->telnet_mode&TELNET_MODE_GATE ? "passed-through" : "received"
						,telnet_cmd_desc(command)
						,telnet_opt_desc(option));
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				if(!(sbbs->telnet_mode&TELNET_MODE_GATE)) {
					if(command==TELNET_DO || command==TELNET_DONT) {	/* local options */
						if(sbbs->telnet_local_option[option]!=command) {
							sbbs->telnet_local_option[option]=command;
							sbbs->send_telnet_cmd(telnet_opt_ack(command),option);
						}
					} else { /* WILL/WONT (remote options) */ 
						if(sbbs->telnet_remote_option[option]!=command) {	
						
							switch(option) {
								case TELNET_BINARY_TX:
								case TELNET_ECHO:
								case TELNET_TERM_TYPE:
								case TELNET_TERM_SPEED:
								case TELNET_SUP_GA:
								case TELNET_NEGOTIATE_WINDOW_SIZE:
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								case TELNET_SEND_LOCATION:
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									sbbs->telnet_remote_option[option]=command;
									sbbs->send_telnet_cmd(telnet_opt_ack(command),option);
									break;
								default: /* unsupported remote options */
									if(command==TELNET_WILL) /* NAK */
										sbbs->send_telnet_cmd(telnet_opt_nak(command),option);
									break;
							}
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						}
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						if(command==TELNET_WILL && option==TELNET_TERM_TYPE) {
							if(startup->options&BBS_OPT_DEBUG_TELNET)
								lprintf(LOG_DEBUG,"Node %d requesting telnet terminal type"
									,sbbs->cfg.node_num);

							char	buf[64];
							sprintf(buf,"%c%c%c%c%c%c"
								,TELNET_IAC,TELNET_SB
								,TELNET_TERM_TYPE,TELNET_TERM_SEND
								,TELNET_IAC,TELNET_SE);
							sbbs->putcom(buf,6);
						}
						else if(command==TELNET_WILL && option==TELNET_TERM_SPEED) {
							if(startup->options&BBS_OPT_DEBUG_TELNET)
								lprintf(LOG_DEBUG,"Node %d requesting telnet terminal speed"
									,sbbs->cfg.node_num);

							char	buf[64];
							sprintf(buf,"%c%c%c%c%c%c"
								,TELNET_IAC,TELNET_SB
								,TELNET_TERM_SPEED,TELNET_TERM_SEND
								,TELNET_IAC,TELNET_SE);
							sbbs->putcom(buf,6);
						}
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					}
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				}
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                sbbs->telnet_cmdlen=0;
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            }
			if(sbbs->telnet_mode&TELNET_MODE_GATE)	// Pass-through commads
				outbuf[outlen++]=inbuf[i];
        } else
        	outbuf[outlen++]=inbuf[i];
    }
    return(outbuf);
}

void sbbs_t::send_telnet_cmd(uchar cmd, uchar opt)
{
	char buf[16];
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	if(telnet_mode&TELNET_MODE_OFF)	
		return;
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	if(cmd<TELNET_WILL) {
		if(startup->options&BBS_OPT_DEBUG_TELNET)
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            lprintf(LOG_DEBUG,"Node %d sending telnet cmd: %s"
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	            ,cfg.node_num
                ,telnet_cmd_desc(cmd));
		sprintf(buf,"%c%c",TELNET_IAC,cmd);
		putcom(buf,2);
	} else {
		if(startup->options&BBS_OPT_DEBUG_TELNET)
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			lprintf(LOG_DEBUG,"Node %d sending telnet cmd: %s %s"
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				,cfg.node_num
				,telnet_cmd_desc(cmd)
				,telnet_opt_desc(opt));
		sprintf(buf,"%c%c%c",TELNET_IAC,cmd,opt);
		putcom(buf,3);
	}
}

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void sbbs_t::request_telnet_opt(uchar cmd, uchar opt)
{
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	if(cmd==TELNET_DO || cmd==TELNET_DONT) {	/* remote option */
		if(telnet_remote_option[opt]==telnet_opt_ack(cmd))
			return;	/* already set in this mode, do nothing */
		telnet_remote_option[opt]=telnet_opt_ack(cmd);
	} else {	/* local option */
		if(telnet_local_option[opt]==telnet_opt_ack(cmd))
			return;	/* already set in this mode, do nothing */
		telnet_local_option[opt]=telnet_opt_ack(cmd);
	}
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	send_telnet_cmd(cmd,opt);
}

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void input_thread(void *arg)
{
	BYTE		inbuf[4000];
   	BYTE		telbuf[sizeof(inbuf)];
    BYTE		*wrbuf;
    int			i,rd,wr,avail;
	ulong		total_recv=0;
	ulong		total_pkts=0;
	fd_set		socket_set;
	sbbs_t*		sbbs = (sbbs_t*) arg;
	struct timeval	tv;
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	SOCKET		high_socket;
	SOCKET		sock;
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	thread_up(TRUE /* setuid */);

#ifdef _DEBUG
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	lprintf(LOG_DEBUG,"Node %d input thread started",sbbs->cfg.node_num);
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#endif

	pthread_mutex_init(&sbbs->input_thread_mutex,NULL);
    sbbs->input_thread_running = true;
	sbbs->console|=CON_R_INPUT;

	while(sbbs->online && sbbs->client_socket!=INVALID_SOCKET
		&& node_socket[sbbs->cfg.node_num-1]!=INVALID_SOCKET) {

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		if(pthread_mutex_lock(&sbbs->input_thread_mutex)!=0)
			sbbs->errormsg(WHERE,ERR_LOCK,"input_thread_mutex",0);
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		FD_ZERO(&socket_set);
		FD_SET(sbbs->client_socket,&socket_set);
		high_socket=sbbs->client_socket;
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#ifdef __unix__
		if(uspy_socket[sbbs->cfg.node_num-1]!=INVALID_SOCKET)  {
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			FD_SET(uspy_socket[sbbs->cfg.node_num-1],&socket_set);
			if(uspy_socket[sbbs->cfg.node_num-1] > high_socket)
				high_socket=uspy_socket[sbbs->cfg.node_num-1];
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		}
#endif

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		tv.tv_sec=1;
		tv.tv_usec=0;
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		if((i=select(high_socket+1,&socket_set,NULL,NULL,&tv))<1) {
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			if(pthread_mutex_unlock(&sbbs->input_thread_mutex)!=0)
				sbbs->errormsg(WHERE,ERR_UNLOCK,"input_thread_mutex",0);
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			if(i==0) {
				YIELD();	/* This kludge is necessary on some Linux distros */
				continue;	/* to allow other threads to lock the input_thread_mutex */
			}
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			if(sbbs->client_socket==INVALID_SOCKET)
				break;