// fingerservice.js
// vi: tabstop=4

// Synchronet Service for the Finger protocol (RFC 1288)
// and/or the Active Users protocol (RFC 866)

// $Id: fingerservice.js,v 1.41 2018/10/15 22:36:51 rswindell Exp $

// Example configurations (in ctrl/services.ini)
// [Finger]
// Port=79
// Options=NO_HOST_LOOKUP
// Command=fingerservice.js

// [Finger-UDP]
// Port=79
// Options=UDP | NO_HOST_LOOKUP
// Command=fingerservice.js

// [ActiveUser]
// Port=11
// Options=NO_HOST_LOOKUP
// Command=fingerservice.js -u

// [ActiveUser-UDP]
// Port=11
// Options=UDP | NO_HOST_LOOKUP
// Command=fingerservice.js -u

// Command-line options:

// -n	add to the Command line to eliminate user age and gender
//		information from the query results.
// -a	report aliases only (no real names)
// -ff	enable the findfile feature (requires a "guest" account)
// -u   report users only (ignore any request), a.k.a. Active Users protocol

// !WARNING!
// Finger is an open protocol utilizing no forms of authorization
// or authentication. FINGER IS A KNOWN AND ACCEPTED SECURITY RISK. 
// Detailed information about your system and its users is made 
// available to ANYONE using this service. If there is anything in
// this script that you do not want to be made available to anyone
// and everyone, please comment-out (using /* and */) that portion
// of the script.

const REVISION = "$Revision: 1.41 $".split(' ')[1];

var include_age_gender=true;
var include_real_name=true;
var findfile=true;
var active_users=false;

load("nodedefs.js");
load("sockdefs.js");
load("sbbsdefs.js");
load("portdefs.js");

for(i=0;i<argc;i++) {
	switch(argv[i].toLowerCase()) {
		case "-n":	// no age or gender
			include_age_gender = false;
			break;
		case "-a":	// aliases only
			include_real_name = false;
			break;
		case "-ff":	// enable findfile (requires "guest" account)
			findfile=true;
			break;
        case "-u": // Active Users only
            active_users=true;
            break;
	}
}


var output_buf = "";

// Write a string to the client socket
function write(str)
{
	output_buf += str;
}

// Write all the output at once
function flush()
{
	client.socket.send(output_buf);
}

// Write a crlf terminated string to the client socket
function writeln(str)
{
	write(str + "\r\n");
}

// Send the contents of a text file to the client socket
function send_file(fname)
{
	f = new File(fname);
	if(!f.open("r")) 
		return;
	txt = f.readAll();
	f.close();
	for(l in txt)
		writeln(txt[l]);
}

// Returns true if a connection on the local 'port' was succesful
function test_port(port)
{
	sock = new Socket();
	success = sock.connect(system.host_name,port);
	sock.close();

	return(success);
}

function xtrn_name(code)
{
	if(this.xtrn_area==undefined)
		return(code);

	if(xtrn_area.prog!=undefined)
		if(xtrn_area.prog[code]!=undefined)
			return(xtrn_area.prog[code].name);
	else {	/* old way */
		for(s in xtrn_area.sec_list)
			for(p in xtrn_area.sec_list[s].prog_list)
				if(xtrn_area.sec_list[s].prog_list[p].code.toLowerCase()==code.toLowerCase())
					return(xtrn_area.sec_list[s].prog_list[p].name);
	}
	return(code);
}

function done()
{
	flush();
	exit();
}

function node_misc(node)
{
	var str = '';
	if(node.misc&(NODE_AOFF|NODE_POFF|NODE_NMSG|NODE_MSGW)) {
		str += " (";
		if(node.misc&NODE_LOCK) str += 'L';
		if(node.misc&NODE_AOFF) str += 'A';
		if(node.misc&NODE_POFF) str += 'P';
		if(node.misc&(NODE_NMSG|NODE_MSGW)) str += 'M';
		str += ")";
	}
	return str;
}

var request="";

if(datagram || !active_users) {

    // Get Finger Request (the main entry point) 
    if(datagram == undefined) 	// TCP
        request = client.socket.recvline(128 /*maxlen*/, 10 /*timeout*/);
    else						// UDP
	    request = datagram;

    if(request==null) {
	    log(LOG_WARNING,"!TIMEOUT waiting for request");
	    exit();
    }

    request = truncsp(request);

    log(LOG_DEBUG,"client request: " + request);

    if(request.substr(0,2).toUpperCase()=="/W")	// "higher level of verbosity"
	    request=request.slice(2);				// ignored...

    while(request.charAt(0)==' ')	// skip prepended spaces
	    request=request.slice(1);
}

if(request=="") {	// no specific user requested, give list of active users
	log("client requested active user list");
	write(format("%-25.25s %-31.31s   Time   %7s Node\r\n"
		,"User","Action",include_age_gender ? "Age Sex":""));
	var dashes="----------------------------------------";
	write(format("%-25.25s %-31.31s %8.8s %3.3s %3.3s %4.4s\r\n"
		,dashes,dashes,dashes
		,include_age_gender ? dashes : ""
		,include_age_gender ? dashes : ""
		,dashes));
	var u = new User(1);
	for(n=0;n<system.node_list.length;n++) {
		var node = system.node_list[n];
		if(node.status!=NODE_INUSE)
			continue;
		if(node.misc&NODE_ANON)
			continue;
		u.number=node.useron;
		if(node.action==NODE_XTRN && node.aux)
			action=format("running %s",xtrn_name(u.curxtrn));
		else
			action=format(NodeAction[node.action],node.aux);
		action += node_misc(node);
		t=time()-u.logontime;
		if(t&0x80000000) t=0;
		write(format("%-25.25s %-31.31s%3u:%02u:%02u %3s %3s %4d\r\n"
			,u.alias
			,action
			,Math.floor(t/(60*60))
			,Math.floor(t/60)%60
			,t%60
			,include_age_gender ? u.age.toString() : ""
			,include_age_gender ? u.gender : ""
			,n+1
			));
	}
	done();
}

// MODIFICATION BY MERLIN PART 1 STARTS HERE...

if(findfile && 0) {	// What is this supposed to do?

	if ((request.slice(0,9)) == "?findfile")  {
		request=request.slice(9);
		request="findfile?".concat(request);
	}

	if ((request.slice(0,9)) == "?filefind")  {
		request=request.slice(9);
		request="findfile?".concat(request);
	}
}

// MODIFICATION BY MERLIN PART 1 ENDS HERE


if(request.charAt(0)=='?' || request.charAt(0)=='.') {	// Handle "special" requests
	request=request.slice(1);
	switch(request.toLowerCase()) {

		case "ver":
			writeln("Synchronet Finger Service " + REVISION);
			writeln(server.version);
			writeln(system.version_notice + system.revision + system.beta_version);
			writeln("Compiled " + system.compiled_when + " with " + system.compiled_with);
			writeln(system.js_version);
			writeln(system.os_version);
			break;

		case "uptime":
			t=system.uptime;
			writeln("Duration: " + String(time()-t));
			writeln(t);
			writeln(system.timestr(t) + " 0x" + t.toString(16));
		case "time":
			t=time();
			writeln(system.timestr(t) + " " + system.zonestr() + " 0x" + t.toString(16));
			break;

		case "logon.lst":
			send_file(system.data_dir + "logon.lst");
			break;

		case "auto.msg":
			send_file(system.data_dir + "msgs/auto.msg");
			break;

		case "sockopts":
			for(i in sockopts)
				writeln(format("%-12s = %d"
					,sockopts[i],client.socket.getoption(sockopts[i])));
			break;

		case "stats":	/* Statistics */
			for(i in system.stats)
				writeln(format("%-25s = ", i) + system.stats[i]);

			total	= time()-system.uptime;
			days	= Math.floor(total/(24*60*60));
		    if(days) 
				total%=(24*60*60);
			hours	= Math.floor(total/(60*60));
			min		= (Math.floor(total/60))%60;
			sec		= total%60;

			writeln(format("uptime = %u days, %u hours, %u minutes and %u seconds"
				,days,hours,min,sec));
			break;

		case "stats.json":
			write(JSON.stringify(system.stats));
			break;

		case "nodelist":
			var u = new User(1);
			for(n=0;n<system.node_list.length;n++) {
				write(format("Node %2d ",n+1));
				var node = system.node_list[n];
				if(node.status==NODE_INUSE
					&& !(node.misc&NODE_ANON)) {
					u.number=node.useron;
					if(include_age_gender)
						write(format("%s (%u %s) ", u.alias, u.age, u.gender));
					else
						write(u.alias + ' ');
					if(node.action==NODE_XTRN && node.aux)
						write(format("running %s",xtrn_name(u.curxtrn)));
					else
						write(format(NodeAction[node.action],node.aux));
					t=time()-u.logontime;
					if(t&0x80000000) t=0;
					write(format(" for %u minutes",Math.floor(t/60)));
					write(node_misc(node));
				} else
					write(format(NodeStatus[node.status],node.aux));

				write("\r\n");
			}
			break;

		case "active-users.json":
			var u = new User(1);
			var list = [];
			for(n=0;n<system.node_list.length;n++) {
			var node = system.node_list[n];
				if(node.status!=NODE_INUSE)
					continue;
				if(node.misc&(NODE_ANON|NODE_POFF))
					continue;
				u.number=node.useron;
				if(node.action==NODE_XTRN && node.aux)
					action=format("running %s",xtrn_name(u.curxtrn));
				else
					action=format(NodeAction[node.action]
								,node.aux);
				t = time()-u.logontime;
				if(t&0x80000000) t = 0;
				var obj =  { name: u.alias, action: action, timeon: t, node: n + 1, location: u.location };
				if(include_age_gender) {
					obj.age = u.age;
					obj.sex = u.gender;
				}
				if(u.chat_settings & CHAT_NOPAGE)
					obj.do_not_disturb = true;
				if(node.misc&(NODE_NMSG|NODE_MSGW))
					obj.msg_waiting = true;
				list.push(obj);
			}
			write(JSON.stringify(list));
			break;

		case "services":	/* Services running on this host */
            var ports = [];
            for(i in standard_service_port) {
                if(i == "finger")
                    continue;
                if(ports.indexOf(standard_service_port[i]) >= 0) // Already tested this port
                    continue;
                ports.push(standard_service_port[i]);
			    if(test_port(standard_service_port[i]))
				    writeln(i);
            }
			break;

		default:
			if(file_exists(system.data_dir + "finger/" + file_getname(request))) {
				send_file(system.data_dir + "finger/" + file_getname(request));
				break;
			}
			writeln("Supported special requests (prepended with '?' or '.'):");
			writeln("\tver");
			writeln("\ttime");
			writeln("\tstats");
			writeln("\tservices");
			writeln("\tsockopts");
			writeln("\tnodelist");
			if(findfile)
				writeln("\tfindfile");
            writeln("\tauto.msg");
			writeln("\tlogon.lst");
			var more = directory(system.data_dir + "finger/*");
			for(var m in more)
				if(!file_isdir(more[m]))
					writeln("\t" + file_getname(more[m]));
			log(format("!UNSUPPORTED SPECIAL REQUEST: '%s'",request));
			break;
	}
	done();
}

// MODIFICATION BY MERLIN PART 3 STARTS HERE...

if(findfile) {
	request=request.toLowerCase();

	if ((request.slice(0,9)) == "filefind?")  {
		request=request.slice(9);
		request="findfile?".concat(request);
	}

	if ((request == "filefind") || (request == "findfile") || (request == "")) {
		request="findfile?";
	}

	if ((request.slice(0,9)) == "findfile?")  {
		request=request.slice(9);
		write(format("\r\nFinger FindFile at %s",system.inetaddr));

		if (request.indexOf("?") != -1) {
			writeln("");
			writeln("");
			writeln("Invalid: You can not use wildcards");
			done();
		}

		if (request.indexOf("*") != -1) {
			writeln("");
			writeln("");
			writeln("Invalid: You can not use wildcards");
			done();
		}

		if (request == "") {
			writeln("");
			writeln("");
			writeln(format("Invalid: You must use findfile?filename.ext@%s",system.inetaddr));
			done();
		}
		if(!login("guest")) {
			writeln("\r\n\r\nFailed to login as 'guest'");
			done();
		}

		notfound = true;
		writeln(format(" searching for '%s'...",request));
		log(format("FindFile searching for: '%s'",request));
		writeln("");        
		for(l in file_area.lib_list) {
			for(d in file_area.lib_list[l].dir_list) {
				dirpath=file_area.lib_list[l].dir_list[d].path
				dirpath=dirpath.concat(request);
				if (file_exists(dirpath)) {
					path="ftp://".concat(system.inetaddr,file_area.lib_list[l].dir_list[d].link,request);
					path=path.toLowerCase();
					writeln(format("Found at %s",path));
					notfound=false;
				}
			}
		}
		if (notfound) {
			writeln("Sorry, that file is not available here");
		}
	done();
	}
}

// MODIFICATION BY MERLIN PART 3 ENDS HERE...


// User info is handled here

var usernum=Number(request);
if(!usernum) {
	var at = request.indexOf('@');
	if(at>0)
		request = request.substr(0,at-1);

	usernum = system.matchuser(request);
	if(!usernum) {
		log(format("!UNKNOWN USER: '%s'",request));
		exit();
	}
}
var u = new User(usernum);
if(u == null) {
	log(format("!INVALID USER NUMBER: %d",usernum));
	exit();
}

uname = format("%s #%d", u.alias, u.number);
write(format("User: %-30s", uname));
if(include_real_name)
	write(format(" In real life: %s", u.name));
write("\r\n");

write(format("From: %-36s Handle: %s\r\n",u.location,u.handle));
if(include_age_gender) {
	birth=format("Birth: %s (Age: %u years)"
		  ,u.birthdate,u.age);
	write(format("%-42s Gender: %s\r\n"
		  ,birth,u.gender));
}
write(format("Shell: %-34s  Editor: %s\r\n"
	  ,u.command_shell,u.editor));
write(format("Last login %s %s\r\nvia %s from %s [%s]\r\n"
	  ,system.timestr(u.stats.laston_date)
	  ,system.zonestr()
	  ,u.connection
	  ,u.host_name
	  ,u.ip_address));
var plan;
plan=format("%suser/%04d.plan",system.data_dir,u.number);
if(file_exists(plan)) {
	write("Plan:\r\n");
	send_file(plan);
	}
else
	write("No plan.\r\n");
done();

/* End of fingerservice.js */
