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KasmVNC/unix/vncserver

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#!/usr/bin/env perl
#
# Copyright (C) 2009-2010 D. R. Commander. All Rights Reserved.
# Copyright (C) 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
# Copyright (C) 2002-2003 Constantin Kaplinsky. All Rights Reserved.
# Copyright (C) 2002-2005 RealVNC Ltd.
# Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
#
# This 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 software 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#
# vncserver - wrapper script to start an X VNC server.
#
use v5.10;
use warnings;
sub DEVENV() { $ENV{KASMVNC_DEVELOPMENT} };
use if DEVENV, Devel::StackTrace;
use Time::HiRes qw (sleep);
use Switch;
use File::Basename;
use List::Util qw(first);
use List::MoreUtils qw(any uniq);
use Data::Dumper;
use Try::Tiny;
use KasmVNC::CliOption;
use KasmVNC::ConfigKey;
use KasmVNC::PatternValidator;
use KasmVNC::EnumValidator;
use KasmVNC::Config;
use KasmVNC::Users;
use KasmVNC::TextOption;
use KasmVNC::TextUI;
use KasmVNC::Utils;
use KasmVNC::Logger;
use constant {
NO_ARG_VALUE => 0,
REQUIRED_ARG_VALUE => 1,
OPTIONAL_ARG_VALUE => 2
};
InitLogger();
CheckWeCanRunInThisEnvironment();
DefineFilePathsAndStuff();
ParseAndProcessCliOptions();
PrepareLoggingAndXvncKillingFramework();
CreateUserConfigIfNeeded();
DefineConfigToCLIConversion();
LoadConfigs();
ActivateConfigToCLIConversion();
SetAppSettingsFromConfigAndCli();
DisableLegacyVncAuth();
AllowXProgramsToConnectToXvnc();
EnsureAtLeastOneKasmUserExists();
ConfigureDeToRun();
StartXvncOrExit();
PrintLogFilenameAndConfiguredUsersAndStuff();
if (! $skipxstartup) {
CreateXstartupIfNeeded();
RunXstartup();
}
PrintBrowserUrl();
exit;
###############################################################################
# Functions
###############################################################################
#
# CheckGeometryAndDepthAreSensible simply makes sure that the geometry and depth
# values are sensible.
#
sub CheckGeometryAndDepthAreSensible
{
if ($geometry =~ /^(\d+)x(\d+)$/) {
$width = $1; $height = $2;
if (($width<1) || ($height<1)) {
die "$prog: geometry $geometry is invalid\n";
}
$geometry = "${width}x$height";
} else {
die "$prog: geometry $geometry is invalid\n";
}
if ($depth && (($depth < 8) || ($depth > 32))) {
die "Depth must be between 8 and 32\n";
}
}
#
# GetLowestAvailableDisplayNumber gets the lowest available display number. A
# display number n is taken if something is listening on the VNC server port
# (5900+n) or the X server port (6000+n).
#
sub GetLowestAvailableDisplayNumber
{
foreach $n (1..99) {
if (CheckVncIsntRunningOnDisplay($n)) {
return $n+0; # Bruce Mah's workaround for bug in perl 5.005_02
}
}
die "$prog: no free display number on $host.\n";
}
#
# CheckVncIsntRunningOnDisplay checks if the given display number is available. A
# display number n is taken if something is listening on the VNC server port
# (5900+n) or the X server port (6000+n).
#
sub CheckVncIsntRunningOnDisplay
{
local ($n) = @_;
socket(S, $AF_INET, $SOCK_STREAM, 0) || die "$prog: socket failed: $!\n";
eval 'setsockopt(S, &SOL_SOCKET, &SO_REUSEADDR, pack("l", 1))';
if (!bind(S, pack('S n x12', $AF_INET, 6000 + $n))) {
close(S);
return 0;
}
close(S);
socket(S, $AF_INET, $SOCK_STREAM, 0) || die "$prog: socket failed: $!\n";
eval 'setsockopt(S, &SOL_SOCKET, &SO_REUSEADDR, pack("l", 1))';
if (!bind(S, pack('S n x12', $AF_INET, 5900 + $n))) {
close(S);
return 0;
}
close(S);
if (-e "/tmp/.X$n-lock") {
$logger->warn("\nWarning: $host:$n is taken because of /tmp/.X$n-lock");
$logger->warn("Remove this file if there is no X server $host:$n");
return 0;
}
if (-e "/tmp/.X11-unix/X$n") {
$logger->warn("\nWarning: $host:$n is taken because of /tmp/.X11-unix/X$n");
$logger->warn("Remove this file if there is no X server $host:$n");
return 0;
}
return 1;
}
#
# GetXDisplayDefaults uses xdpyinfo to find out the geometry, depth and pixel
# format of the current X display being used. If successful, it sets the
# options as appropriate so that the X VNC server will use the same settings
# (minus an allowance for window manager decorations on the geometry). Using
# the same depth and pixel format means that the VNC server won't have to
# translate pixels when the desktop is being viewed on this X display (for
# TrueColor displays anyway).
#
sub GetXDisplayDefaults
{
local (@lines, @matchlines, $width, $height, $defaultVisualId, $i,
$red, $green, $blue);
$wmDecorationWidth = 4; # a guess at typical size for window manager
$wmDecorationHeight = 24; # decoration size
return if (!defined($ENV{DISPLAY}));
@lines = `xdpyinfo 2>/dev/null`;
return if ($? != 0);
@matchlines = grep(/dimensions/, @lines);
if (@matchlines) {
($width, $height) = ($matchlines[0] =~ /(\d+)x(\d+) pixels/);
$width -= $wmDecorationWidth;
$height -= $wmDecorationHeight;
$geometry = "${width}x$height";
}
@matchlines = grep(/default visual id/, @lines);
if (@matchlines) {
($defaultVisualId) = ($matchlines[0] =~ /id:\s+(\S+)/);
for ($i = 0; $i < @lines; $i++) {
if ($lines[$i] =~ /^\s*visual id:\s+$defaultVisualId$/) {
if (($lines[$i+1] !~ /TrueColor/) ||
($lines[$i+2] !~ /depth/) ||
($lines[$i+4] !~ /red, green, blue masks/))
{
return;
}
last;
}
}
return if ($i >= @lines);
($depth) = ($lines[$i+2] =~ /depth:\s+(\d+)/);
($red,$green,$blue)
= ($lines[$i+4]
=~ /masks:\s+0x([0-9a-f]+), 0x([0-9a-f]+), 0x([0-9a-f]+)/);
$red = hex($red);
$green = hex($green);
$blue = hex($blue);
if ($red > $blue) {
$red = int(log($red) / log(2)) - int(log($green) / log(2));
$green = int(log($green) / log(2)) - int(log($blue) / log(2));
$blue = int(log($blue) / log(2)) + 1;
$pixelformat = "rgb$red$green$blue";
} else {
$blue = int(log($blue) / log(2)) - int(log($green) / log(2));
$green = int(log($green) / log(2)) - int(log($red) / log(2));
$red = int(log($red) / log(2)) + 1;
$pixelformat = "bgr$blue$green$red";
}
}
}
#
# quotedString returns a string which yields the original string when parsed
# by a shell.
#
sub quotedString
{
local ($in) = @_;
$in =~ s/\'/\'\"\'\"\'/g;
return "'$in'";
}
#
# removeSlashes turns slashes into underscores for use as a file name.
#
sub removeSlashes
{
local ($in) = @_;
$in =~ s|/|_|g;
return "$in";
}
#
# Usage
#
sub Usage
{
die("\nusage: $prog [:<number>] [-desktop <desktop-name>] [-depth <depth>]\n".
" [-geometry <width>x<height>]\n".
" [-pixelformat rgbNNN|bgrNNN]\n".
" [-fp <font-path>]\n".
" [-fg]\n".
" [-autokill]\n".
" [-noxstartup]\n".
" [-xstartup <file>]\n".
" <Xvnc-options>...\n\n".
" $prog -kill <X-display>\n\n".
" $prog -list\n\n");
}
#
# List
#
sub List
{
opendir(dirHandle, $vncUserDir);
my @filelist = readdir(dirHandle);
closedir(dirHandle);
print "\nKasmVNC server sessions:\n\n";
print "X DISPLAY #\tPROCESS ID\n";
foreach my $file (@filelist) {
if ($file =~ /$host:(\d+).pid/) {
chop($tmp_pid = `cat $vncUserDir/$file`);
if (IsProcessRunning($tmp_pid)) {
print ":".$1."\t\t".`cat $vncUserDir/$file`;
} else {
unlink ($vncUserDir . "/" . $file);
}
}
}
exit 1;
}
#
# Kill
#
sub Kill
{
$opt{'-kill'} =~ s/(:\d+)\.\d+$/$1/; # e.g. turn :1.0 into :1
if ($opt{'-kill'} =~ /^:\d+$/) {
$pidFile = "$vncUserDir/$host$opt{'-kill'}.pid";
} else {
if ($opt{'-kill'} !~ /^$host:/) {
die "\nCan't tell if $opt{'-kill'} is on $host\n".
"Use -kill :<number> instead\n\n";
}
$pidFile = "$vncUserDir/$opt{'-kill'}.pid";
}
if (! -r $pidFile) {
die "\nCan't find file $pidFile\n".
"You'll have to kill the Xvnc process manually\n\n";
}
$SIG{'HUP'} = 'IGNORE';
chop($pid = `cat $pidFile`);
$logger->warn("Killing Xvnc process ID $pid");
if (IsProcessRunning($pid)) {
system("kill $pid");
WaitForTimeLimitOrSubReturningTrue(1, sub {
!IsProcessRunning($pid)
});
if (IsProcessRunning($pid)) {
print "Xvnc seems to be deadlocked. Kill the process manually and then re-run\n";
print " ".$0." -kill ".$opt{'-kill'}."\n";
print "to clean up the socket files.\n";
exit
}
} else {
$logger->warn("Xvnc process ID $pid already killed");
$opt{'-kill'} =~ s/://;
if (-e "/tmp/.X11-unix/X$opt{'-kill'}") {
print "Xvnc did not appear to shut down cleanly.";
print " Removing /tmp/.X11-unix/X$opt{'-kill'}\n";
unlink "/tmp/.X11-unix/X$opt{'-kill'}";
}
if (-e "/tmp/.X$opt{'-kill'}-lock") {
print "Xvnc did not appear to shut down cleanly.";
print " Removing /tmp/.X$opt{'-kill'}-lock\n";
unlink "/tmp/.X$opt{'-kill'}-lock";
}
}
unlink $pidFile;
exit;
}
#
# ParseOptionsAndRemoveMatchesFromARGV takes a list of possible options. Each
# option has a matching argument, indicating whether the option has a value
# following (can be required or optional), and sets up an associative array %opt
# of the values of the options given on the command line. It removes all the
# arguments it uses from @ARGV and returns them in @optArgs.
#
sub ParseOptionsAndRemoveMatchesFromARGV
{
local (@optval) = @_;
local ($opt, @opts, %valFollows, @newargs);
while (@optval) {
$opt = shift(@optval);
push(@opts,$opt);
$valFollows{$opt} = shift(@optval);
}
@optArgs = ();
%opt = ();
arg: while (defined($arg = shift(@ARGV))) {
foreach $opt (@opts) {
if ($arg eq $opt) {
push(@optArgs, $arg);
switch($valFollows{$opt}) {
case NO_ARG_VALUE {
$opt{$opt} = 1;
next arg;
}
case REQUIRED_ARG_VALUE {
if (@ARGV == 0) {
Usage();
}
$opt{$opt} = shift(@ARGV);
push(@optArgs, $opt{$opt});
next arg;
}
case OPTIONAL_ARG_VALUE {
if (scalar @ARGV == 0 || $ARGV[0] =~ /^-/) {
$opt{$opt} = 1;
next arg;
}
$opt{$opt} = shift(@ARGV);
push(@optArgs, $opt{$opt});
next arg;
}
}
}
}
push(@newargs,$arg);
}
@ARGV = @newargs;
}
# Routine to make sure we're operating in a sane environment.
sub CheckRequiredDependenciesArePresent
{
local ($cmd);
# Get the program name
($prog) = ($0 =~ m|([^/]+)$|);
#
# Check we have all the commands we'll need on the path.
#
cmd:
foreach $cmd ("uname","xauth","hostname","whoami") {
for (split(/:/,$ENV{PATH})) {
if (-x "$_/$cmd") {
next cmd;
}
}
die "$prog: couldn't find \"$cmd\" on your PATH.\n";
}
if($exedir eq "") {
cmd2:
foreach $cmd ("Xvnc","vncpasswd") {
for (split(/:/,$ENV{PATH})) {
if (-x "$_/$cmd") {
next cmd2;
}
}
die "$prog: couldn't find \"$cmd\" on your PATH.\n";
}
}
else {
cmd3:
foreach $cmd ($exedir."Xvnc",$exedir."vncpasswd") {
for (split(/:/,$ENV{PATH})) {
if (-x "$cmd") {
next cmd3;
}
}
die "$prog: couldn't find \"$cmd\".\n";
}
}
if (!defined($ENV{HOME})) {
die "$prog: The HOME environment variable is not set.\n";
}
#
# Find socket constants. 'use Socket' is a perl5-ism, so we wrap it in an
# eval, and if it fails we try 'require "sys/socket.ph"'. If this fails,
# we just guess at the values. If you find perl moaning here, just
# hard-code the values of AF_INET and SOCK_STREAM. You can find these out
# for your platform by looking in /usr/include/sys/socket.h and related
# files.
#
chop($os = `uname`);
chop($osrev = `uname -r`);
eval 'use Socket';
if ($@) {
eval 'require "sys/socket.ph"';
if ($@) {
if (($os eq "SunOS") && ($osrev !~ /^4/)) {
$AF_INET = 2;
$SOCK_STREAM = 2;
} else {
$AF_INET = 2;
$SOCK_STREAM = 1;
}
} else {
$AF_INET = &AF_INET;
$SOCK_STREAM = &SOCK_STREAM;
}
} else {
$AF_INET = &AF_INET;
$SOCK_STREAM = &SOCK_STREAM;
}
}
sub CheckSslCertReadable {
return if IsDryRun();
RequireSslCertsToBeReadable();
}
sub IsDebian {
return -f "/etc/debian_version";
}
sub RequireSslCertsToBeReadable {
my $certFilename = DerivedValue("network.ssl.pem_certificate");
my $certKeyFilename = DerivedValue("network.ssl.pem_key");
@certs = ($certFilename, $certKeyFilename);
@certs = grep defined, @certs;
@certs = uniq @certs;
my @unreadableCertFiles = map { -r $_ ? () : $_ } @certs;
return if (scalar @unreadableCertFiles == 0);
foreach my $unreadableCert (@unreadableCertFiles) {
GuideUserToMakeCertFileReadable($unreadableCert);
}
exit 1;
}
sub FileGroupName {
my $file = shift;
my $grpId = (stat($file))[5];
getgrgid($grpId);
}
sub AddUserToGroupCmd {
my $certGroup = shift;
if (IsRpmSystem()) {
"usermod -a -G $certGroup \$USER"
} else {
"addgroup \$USER $certGroup"
}
}
sub GuideUserToMakeCertFileReadable {
my $certFile = shift;
if (! -f $certFile) {
$logger->warn("$certFile: certificate file doesn't exist or isn't a file");
return;
}
my $certGroup = FileGroupName $certFile;
my $addUserToGroupCmd = AddUserToGroupCmd $certGroup;
$logger->warn(<<EOF);
$certFile: certificate isn't readable.
Make the certificate readable by adding your user to group "$certGroup":
'$addUserToGroupCmd'
EOF
}
sub IsRpmSystem {
system("command -v rpm >/dev/null 2>&1") == 0;
}
sub RequireUserToHaveKasmvncCertGroup {
my $certGroup = 'kasmvnc-cert';
if (system("groups | grep -qw $certGroup") != 0) {
$logger->warn(<<EOF);
Can't access TLS certificate.
Please add your user to $certGroup via 'usermod -a -G $certGroup \$USER'
EOF
exit(1);
}
}
sub CreateXstartupIfNeeded
{
if ((-e "$xstartupFile")) {
return;
}
my $defaultXStartup
= ("#!/bin/sh\n\n".
"unset SESSION_MANAGER\n".
"unset DBUS_SESSION_BUS_ADDRESS\n".
"OS=`uname -s`\n".
"if [ \$OS = 'Linux' ]; then\n".
" case \"\$WINDOWMANAGER\" in\n".
" \*gnome\*)\n".
" if [ -e /etc/SuSE-release ]; then\n".
" PATH=\$PATH:/opt/gnome/bin\n".
" export PATH\n".
" fi\n".
" ;;\n".
" esac\n".
"fi\n".
"if [ -x /etc/X11/xinit/xinitrc ]; then\n".
" exec /etc/X11/xinit/xinitrc\n".
"fi\n".
"if [ -f /etc/X11/xinit/xinitrc ]; then\n".
" exec sh /etc/X11/xinit/xinitrc\n".
"fi\n".
"[ -r \$HOME/.Xresources ] && xrdb \$HOME/.Xresources\n".
"xsetroot -solid grey\n".
"xterm -geometry 80x24+10+10 -ls -title \"\$VNCDESKTOP Desktop\" &\n".
"twm\n");
$logger->warn("Creating default startup script $xstartupFile");
open(XSTARTUP, ">$xstartupFile");
print XSTARTUP $defaultXStartup;
close(XSTARTUP);
chmod 0755, "$xstartupFile";
}
sub DetectAndExportDisplay {
# If the unix domain socket exists then use that (DISPLAY=:n) otherwise use
# TCP (DISPLAY=host:n)
if (-e "/tmp/.X11-unix/X$displayNumber" ||
-e "/usr/spool/sockets/X11/$displayNumber")
{
$ENV{DISPLAY}= ":$displayNumber";
} else {
$ENV{DISPLAY}= "$host:$displayNumber";
}
}
sub RunXstartup {
$logger->warn("Starting applications specified in $xstartupFile");
DetectAndExportDisplay();
$ENV{VNCDESKTOP}= $desktopName;
if ($opt{'-fg'}) {
if (! $skipxstartup) {
system("$xstartupFile >> " . quotedString($desktopLog) . " 2>&1");
}
if (IsXvncRunning()) {
$opt{'-kill'} = ':'.$displayNumber;
Kill();
}
} else {
if ($opt{'-autokill'}) {
if (! $skipxstartup) {
system("($xstartupFile; $0 -kill :$displayNumber) >> "
. quotedString($desktopLog) . " 2>&1 &");
}
} else {
if (! $skipxstartup) {
system("$xstartupFile >> " . quotedString($desktopLog)
. " 2>&1 &");
}
}
}
}
sub DetectBinariesDir {
my $result = "";
my $slashndx = rindex($0, "/");
if($slashndx>=0) {
$result = substr($0, 0, $slashndx+1);
}
if ($result =~ m!unix/!) {
$result = "/usr/bin/";
}
return $result;
}
sub DetectFontPath {
if (-d "/etc/X11/fontpath.d") {
$fontPath = "catalogue:/etc/X11/fontpath.d";
}
@fontpaths = ('/usr/share/X11/fonts', '/usr/share/fonts', '/usr/share/fonts/X11/');
if (! -l "/usr/lib/X11") {push(@fontpaths, '/usr/lib/X11/fonts');}
if (! -l "/usr/X11") {push(@fontpaths, '/usr/X11/lib/X11/fonts');}
if (! -l "/usr/X11R6") {push(@fontpaths, '/usr/X11R6/lib/X11/fonts');}
push(@fontpaths, '/usr/share/fonts/default');
@fonttypes = ('misc',
'75dpi',
'100dpi',
'Speedo',
'Type1');
foreach $_fpath (@fontpaths) {
foreach $_ftype (@fonttypes) {
if (-f "$_fpath/$_ftype/fonts.dir") {
if (! -l "$_fpath/$_ftype") {
$defFontPath .= "$_fpath/$_ftype,";
}
}
}
}
if ($defFontPath) {
if (substr($defFontPath, -1, 1) eq ',') {
chop $defFontPath;
}
}
if (!defined($fontPath) || $fontPath eq "") {
$fontPath = $defFontPath;
}
}
sub ProcessCliOptions {
Usage() if ($opt{'-help'} || $opt{'-h'} || $opt{'--help'});
Kill() if ($opt{'-kill'});
List() if ($opt{'-list'});
# Uncomment this line if you want default geometry, depth and pixelformat
# to match the current X display:
# GetXDisplayDefaults();
if ($opt{'-geometry'}) {
$geometry = $opt{'-geometry'};
}
if ($opt{'-noxstartup'}) {
$skipxstartup = 1;
}
if ($opt{'-xstartup'}) {
$xstartupFile = $opt{'-xstartup'};
}
if ($opt{'-fp'}) {
$fontPath = $opt{'-fp'};
$fpArgSpecified = 1;
}
if ($opt{'-debug'}) {
$debug = 1;
delete $opt{'-debug'};
$opt{'-Log'} = '*:stderr:100';
}
if ($opt{'-config'}) {
@configFiles = split ",", $opt{'-config'};
delete $opt{'-config'};
}
$testOutputTopic = $opt{'-test-output-topic'};
}
sub CreateDotVncDir {
if (!(-e $vncUserDir)) {
if (!mkdir($vncUserDir,0755)) {
die "$prog: Could not create $vncUserDir.\n";
}
}
}
sub DeWasSelectedEarlier {
-e $de_was_selected_file;
}
sub DeWasSpecifiedOnCommandLine {
defined($opt{'-select-de'}) && $opt{'-select-de'} ne "1";
}
sub PromptingForDeWasRequestedOnCommandLine {
return unless defined($opt{'-select-de'});
$opt{'-select-de'} == 1;
}
sub WarnIfShouldPromptForDe {
return unless shouldPromptUserToSelectDe();
$logger->warn(<<WARNING);
Warning: the Desktop Environment to run wasn't selected, but prompting to select
a Desktop Environment was disabled.
WARNING
}
sub DeWasntSelectedYet() {
!DeWasSelectedEarlier();
}
sub shouldPromptUserToSelectDe() {
return 1 if DeWasntSelectedYet();
PromptingForDeWasRequestedOnCommandLine();
}
sub SelectDe {
$selectDeCmd = ConstructSelectDeCmd();
system($selectDeCmd) == 0 || die("Failed to execute $selectDeCmd\n");
}
sub ConfigureDeToRun {
if (DeWasSpecifiedOnCommandLine()) {
SelectDe();
return;
}
AskUserToChooseDeOrManualXstartup();
}
sub AskUserToChooseDeOrManualXstartup {
return if IsDryRun();
if (PromptingDisabled()) {
WarnIfShouldPromptForDe();
return;
}
return unless shouldPromptUserToSelectDe();
ForgetSelectedDe();
SelectDe();
}
sub ConstructSelectDeCmd {
my $cmd = "$selectDeBin";
my $specifiedDe = $opt{'-select-de'};
if ($specifiedDe) {
$cmd .= " --select-de";
if ($specifiedDe ne "1") {
$cmd .= " $specifiedDe";
}
}
$cmd;
}
sub ForgetSelectedDe {
unlink $de_was_selected_file;
}
sub DetectDisplayNumberFromCliArgs {
if (@ARGV == 0) {
return;
}
my $displayNumber;
if ($ARGV[0] =~ /^:(\d+)$/) {
$displayNumber = $1;
shift(@ARGV);
if (!CheckVncIsntRunningOnDisplay($displayNumber)) {
die "A VNC server is already running as :$displayNumber\n";
}
}
$displayNumber;
}
sub CheckCliOptionsForBeingValid {
if (@ARGV == 0) {
return;
}
if (! IsCliOption($ARGV[0])) {
Usage();
}
}
sub IsCliOption {
my $arg = shift;
($arg =~ /^-/) || ($arg =~ /^\+/);
}
sub DisableLegacyVncAuth {
# Disable vnc auth, kasmvnc uses https basic auth
system("echo 'WrLNwLrcrxM=' | base64 -d > $vncUserDir/passwd");
}
sub TellUserToSetupUserAndPassword {
if (AtLeastOneUserConfigured()) {
return;
}
$logger->warn("\nYou need to create a KasmVNC user to access your desktops.\n");
system($exedir."kasmvncpasswd $kasmPasswdFile");
if (($? >> 8) != 0) {
exit 1;
}
}
sub DefaultKasmUsername {
my $defaultUsername = $systemUser;
return if ($users->userExists($defaultUsername));
$defaultUsername;
}
sub PromptForUsernameToCreate {
my $defaultKasmUsername = DefaultKasmUsername();
my $prompt;
if ($defaultKasmUsername) {
$prompt = "Enter username (default: $defaultKasmUsername): ";
} else {
$prompt = "Enter username: ";
}
Prompt($prompt) || $defaultKasmUsername;
}
sub GuideUserToEnterUserToCreate {
my $userToCreate;
print(<<"NEEDTOCREATEUSER");
Let's create a user.
NEEDTOCREATEUSER
while (1) {
$userToCreate = PromptForUsernameToCreate();
next if !defined($userToCreate) || $userToCreate =~ /^\s+$/;
if ($users->userExists($userToCreate)) {
say "User already exists: \"$userToCreate\"";
next;
}
last;
};
$userToCreate;
}
sub GuideUserToSetupKasmPasswdUser {
my $userToCreate = GuideUserToEnterUserToCreate();
unless ($users->addUser($userToCreate, "w")) {
die("\nFailed to setup user \"$userToCreate\"\n");
}
print("Created user \"$userToCreate\"\n");
}
sub AtLeastOneUserConfigured {
$users->count() > 0;
}
sub MakeXCookie {
# Make an X server cookie and set up the Xauthority file
# mcookie is a part of util-linux, usually only GNU/Linux systems have it.
my $cookie = `mcookie`;
# Fallback for non GNU/Linux OS - use /dev/urandom on systems that have it,
# otherwise use perl's random number generator, seeded with the sum
# of the current time, our PID and part of the encrypted form of the password.
if ($cookie eq "" && open(URANDOM, '<', '/dev/urandom')) {
my $randata;
if (sysread(URANDOM, $randata, 16) == 16) {
$cookie = unpack 'h*', $randata;
}
close(URANDOM);
}
if ($cookie eq "") {
srand(time+$$+unpack("L",`cat $vncUserDir/passwd`));
for (1..16) {
$cookie .= sprintf("%02x", int(rand(256)) % 256);
}
}
return $cookie;
}
sub SetupXauthorityFile {
my $cookie = MakeXCookie();
open(XAUTH, "|xauth -f $xauthorityFile source -");
print XAUTH "add $host:$displayNumber . $cookie\n";
print XAUTH "add $host/unix:$displayNumber . $cookie\n";
close(XAUTH);
}
sub UserSpecifiedArgsToCmd {
my $cmd = "";
foreach my $arg (@ARGV) {
$cmd .= " " . quotedString($arg);
noteXvncOption($arg) if $arg =~ /^-/;
}
$cmd;
}
sub ConstructXvncCmd {
my $cmd = $exedir."Xvnc :$displayNumber";
$cmd .= UserSpecifiedArgsToCmd();
$cmd .= SwallowedArgsToCmd();
$cmd .= ConfigToCmd();
$cmd .= LegacyModeArgsToCmd();
$cmd .= " >> " . quotedString($desktopLog) . " 2>&1";
return $cmd;
}
sub LegacyModeArgsToCmd {
my %legacyOptions = (
-rfbauth => "$vncUserDir/passwd",
-rfbport => 5901,
-rfbwait => 30000
);
my @cmd = ();
while(my($optionName, $optionArg) = each %legacyOptions) {
next if WasOptionSpecifiedViaCli($optionName);
my $optionText = "$optionName " . quotedString($optionArg);
push(@cmd, $optionText);
noteXvncOption($optionName);
}
my $legacyCmd = join " ", @cmd;
" $legacyCmd";
}
sub noteXvncOption {
my $optionName = shift;
$addedXvncOptions{$optionName} = 1;
}
sub WasOptionSpecifiedViaCli {
my $optionName = shift;
$addedXvncOptions{$optionName};
}
sub SwallowedArgsToCmd {
my @swallowedOptions = qw(-fp -interface -websocketPort -Log);
my @optionsInCliFormat = map { SwallowedOptionToCLI($_) } @swallowedOptions;
" " . join " ", @optionsInCliFormat;
}
sub SwallowedOptionToCLI {
my $optionName = shift;
return unless ($opt{$optionName});
noteXvncOption($optionName);
"$optionName " . quotedString($opt{$optionName});
}
sub StartXvncAndRecordPID {
system("$cmd & echo \$! >$pidFile");
}
sub DeleteLogLeftFromPreviousXvncRun {
unlink($desktopLog);
}
sub StartXvncWithSafeFontPath {
if ($fpArgSpecified) {
$logger->warn("\nWARNING: The first attempt to start Xvnc failed, probably because the font");
$logger->warn("path you specified using the -fp argument is incorrect. Attempting to");
$logger->warn("determine an appropriate font path for this system and restart Xvnc using");
$logger->warn("that font path ...");
} else {
$logger->warn("\nWARNING: The first attempt to start Xvnc failed, possibly because the font");
$logger->warn("catalog is not properly configured. Attempting to determine an appropriate");
$logger->warn("font path for this system and restart Xvnc using that font path ...");
}
$cmd =~ s@-fp [^ ]+@@;
$cmd .= " -fp $defFontPath" if ($defFontPath);
StartXvncAndRecordPID();
}
sub IsXvncRunning {
IsProcessRunning(`cat $pidFile`);
}
sub WarnUserXvncNotStartedAndExit {
$logger->warn("Could not start Xvnc.\n");
unlink $pidFile;
open(LOG, "<$desktopLog");
while (<LOG>) { print; }
close(LOG);
die "\n";
}
sub WaitForXvncToRespond {
my $sleepSlice = 0.1;
my $sleptFor = 0;
my $sleepLimit = 3;
until (IsXvncResponding() || $sleptFor >= $sleepLimit) {
sleep($sleepSlice);
$sleptFor += $sleepSlice;
}
}
sub IsXvncResponding {
`xdpyinfo -display :$displayNumber >/dev/null 2>&1`;
$? == 0;
}
sub UsingSafeFontPath {
$fontPath eq $defFontPath
}
sub CreateUserConfigIfNeeded {
my $configFilename = "$vncUserDir/kasmvnc.yaml";
if (-e $configFilename) {
return;
}
$logger->warn("Creating default config $configFilename");
open(VNCUSERCONFIG, ">$configFilename");
print VNCUSERCONFIG $defaultConfig;
close(VNCUSERCONFIG);
chmod 0644, "$configFilename";
}
sub PrintKasmUsers {
$logger->warn("\nUsers configured:");
$logger->warn($users->toString());
$logger->warn("");
}
sub CheckWeCanRunInThisEnvironment {
$exedir = DetectBinariesDir();
CheckRequiredDependenciesArePresent();
}
sub DefineFilePathsAndStuff {
#
# Global variables. You may want to configure some of these for
# your site
#
$geometry = "1024x768";
$vncUserDir = "$ENV{HOME}/.vnc";
$vncUserConfig = "$vncUserDir/config";
$kasmPasswdFile = "$ENV{HOME}/.kasmpasswd";
$selectDeBin = DetectSelectDeBin();
$de_was_selected_file="$ENV{HOME}/.vnc/.de-was-selected";
$KasmVNC::Users::vncPasswdBin = $exedir . "kasmvncpasswd";
$KasmVNC::Users::logger = $logger;
$vncSystemConfigDir = "/etc/kasmvnc";
if ($ENV{KASMVNC_DEVELOPMENT}) {
$vncDefaultsConfig = "/src/unix/kasmvnc_defaults.yaml";
$vncSystemConfig = "/src/unix/kasmvnc.yaml";
} else {
$vncDefaultsConfig = "/usr/share/kasmvnc/kasmvnc_defaults.yaml";
$vncSystemConfig = "$vncSystemConfigDir/kasmvnc.yaml";
}
$vncUserConfig = "$ENV{HOME}/.vnc/kasmvnc.yaml";
@configFiles = ($vncDefaultsConfig, $vncSystemConfig, $vncUserConfig);
$defaultWebsocketPort = 8443;
$skipxstartup = 0;
$xauthorityFile = $ENV{XAUTHORITY} // "$ENV{HOME}/.Xauthority";
$xstartupFile = $vncUserDir . "/xstartup";
$defaultConfig = <<TEXT;
logging:
log_writer_name: all
log_dest: logfile
level: 100
TEXT
%appSettings = ();
%addedXvncOptions = ();
chop($host = `uname -n`);
chop($hostIPs = `hostname -i`);
@hostIPs = split ' ', $hostIPs;
chop($systemUser = `whoami`);
DetectFontPath();
}
sub limitVncModeOptions {
my $self = shift;
my $protocol = ConfigValue("network.protocol");
return 1 if isBlank($protocol) || $protocol eq "http";
my @allowedVncModeOptions = qw(network.protocol
server.advanced.x_authority_file legacy.desktop_name
server.advanced.x_font_path desktop.resolution.width);
first { $self->hasKey($_) } @allowedVncModeOptions;
}
sub DefineConfigToCLIConversion {
$KasmVNC::CliOption::fetchValueSub = \&ConfigValue;
$KasmVNC::ConfigKey::fetchValueSub = \&ConfigValue;
my $regionValidator = KasmVNC::PatternValidator->new({
pattern => qr/^(-)?\d+(%)?$/,
errorMessage => "must be an integer or percentage"
});
my $clipboardSizeValidator = KasmVNC::PatternValidator->new({
pattern => qr/^(unlimited|\d+)$/,
errorMessage => "must be 'unlimited' or a number"
});
my $autoNumberValidator = KasmVNC::PatternValidator->new({
pattern => qr/^(auto|\d+)$/,
errorMessage => "must be 'auto' or a number"
});
my $secondsValidator = KasmVNC::PatternValidator->new({
pattern => qr/^(never|\d+)$/,
errorMessage => "must be a number or 'never'"
});
my $allConfigKeysValidatorSub = sub {
my @allConfigKeys = map { $_->configKeyNames() } @xvncOptions;
KasmVNC::EnumValidator->new({
allowedValues => [flatten(@allConfigKeys)]
})
};
KasmVNC::CliOption::beforeIsActive(\&limitVncModeOptions);
my $ipv4_regexp = '((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.|$)){4}';
my $ipv6_regexp = '(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))';
@xvncOptions = (
KasmVNC::CliOption->new({
name => 'geometry',
configKeys => [
KasmVNC::ConfigKey->new({
name => "desktop.resolution.width",
type => KasmVNC::ConfigKey::INT
}),
KasmVNC::ConfigKey->new({
name => "desktop.resolution.height",
type => KasmVNC::ConfigKey::INT
})
],
deriveValueSub => sub {
$self = shift;
my $width = $self->{'desktop.resolution.width'};
my $height = $self->{'desktop.resolution.height'};
if (defined($width) && defined($height)) {
return $width . "x" . $height;
}
$geometry;
}
}),
KasmVNC::CliOption->new({
name => 'AcceptSetDesktopSize',
configKeys => [
KasmVNC::ConfigKey->new({
name => "desktop.allow_resize",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'depth',
configKeys => [
KasmVNC::ConfigKey->new({
name => "desktop.pixel_depth",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(16 24 32)]
})
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
$value || $depth;
}
}),
KasmVNC::CliOption->new({
name => 'noWebsocket',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.protocol",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(http vnc)]
})
})
],
isActiveSub => sub {
my $self = shift;
my $protocol = $self->{"network.protocol"};
return unless defined($protocol);
$protocol eq "vnc";
},
deriveValueSub => sub { 1 }
}),
KasmVNC::CliOption->new({
name => 'websocketPort',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.websocket_port",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(auto|\d+)$/,
errorMessage => "must be one a number or 'auto'"
}),
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if ($value eq 'auto' || !defined($value)) {
return GenerateWebsocketPortFromDisplayNumber();
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'interface',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.interface",
type => KasmVNC::ConfigKey::ANY
})
]
}),
KasmVNC::CliOption->new({
name => 'UseIPv4',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.use_ipv4",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'UseIPv6',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.use_ipv6",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'cert',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.ssl.pem_certificate",
type => KasmVNC::ConfigKey::ANY
})
]
}),
KasmVNC::CliOption->new({
name => 'key',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.ssl.pem_key",
type => KasmVNC::ConfigKey::ANY
})
]
}),
KasmVNC::CliOption->new({
name => 'sslOnly',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.ssl.require_ssl",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'AlwaysShared',
configKeys => [
KasmVNC::ConfigKey->new({
name => "user_session.session_type",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(shared exclusive)]
})
})
],
deriveValueSub => sub {
1;
},
isActiveSub => sub {
my $self = shift;
my $sessionType = $self->configValue();
return unless defined($sessionType);
$sessionType eq "shared";
}
}),
KasmVNC::CliOption->new({
name => 'DisconnectClients',
configKeys => [
KasmVNC::ConfigKey->new({
name => "user_session.new_session_disconnects_existing_exclusive_session",
type => KasmVNC::ConfigKey::ANY
})
],
deriveValueSub => sub {
my $self = shift;
$self->configValue() eq "true" ? 1 : 0;
}
}),
KasmVNC::CliOption->new({
name => 'NeverShared',
configKeys => [
KasmVNC::ConfigKey->new({
name => "user_session.session_type",
type => KasmVNC::ConfigKey::ANY
})
],
deriveValueSub => sub {
1;
},
isActiveSub => sub {
my $self = shift;
my $sessionType = $self->configValue();
return unless defined($sessionType);
$sessionType eq "exclusive";
},
}),
KasmVNC::CliOption->new({
name => 'QueryConnect',
configKeys => [
KasmVNC::ConfigKey->new({
name => "user_session.concurrent_connections_prompt",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'IdleTimeout',
configKeys => [
KasmVNC::ConfigKey->new({
name => "user_session.idle_timeout",
validator => $secondsValidator
})
],
deriveValueSub => \&deriveSeconds
}),
KasmVNC::CliOption->new({
name => 'RemapKeys',
configKeys => [
KasmVNC::ConfigKey->new({
name => "keyboard.remap_keys",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^0x[[:xdigit:]]+->0x[[:xdigit:]]+$/,
errorMessage => "must be in the format 0x<hex_number>->0x<hex_number>"
}),
})
]
}),
KasmVNC::CliOption->new({
name => 'AvoidShiftNumLock',
configKeys => [
KasmVNC::ConfigKey->new({
name => "keyboard.ignore_numlock",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'RawKeyboard',
configKeys => [
KasmVNC::ConfigKey->new({
name => "keyboard.raw_keyboard",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'AcceptPointerEvents',
configKeys => [
KasmVNC::ConfigKey->new({
name => "pointer.enabled",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'Log',
configKeys => [
KasmVNC::ConfigKey->new({
name => "logging.log_writer_name",
type => KasmVNC::ConfigKey::ANY
}),
KasmVNC::ConfigKey->new({
name => "logging.log_dest",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(logfile syslog)]
})
}),
KasmVNC::ConfigKey->new({
name => "logging.level",
type => KasmVNC::ConfigKey::INT
})
],
deriveValueSub => sub {
my $self = shift;
my $writerName = $self->{"logging.log_writer_name"};
if ($writerName eq "all") {
$writerName = "*";
}
my $log_dest = $self->{"logging.log_dest"};
if ($log_dest eq "logfile") {
$log_dest = "stdout";
}
my $level = $self->{"logging.level"};
"$writerName:$log_dest:$level";
}
}),
KasmVNC::CliOption->new({
name => 'BlacklistThreshold',
configKeys => [
KasmVNC::ConfigKey->new({
name => "security.brute_force_protection.blacklist_threshold",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'BlacklistTimeout',
configKeys => [
KasmVNC::ConfigKey->new({
name => "security.brute_force_protection.blacklist_timeout",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'DLP_Region',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.visible_region.top",
validator => $regionValidator
}),
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.visible_region.left",
validator => $regionValidator
}),
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.visible_region.right",
validator => $regionValidator
}),
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.visible_region.bottom",
validator => $regionValidator
}),
],
deriveValueSub => sub {
my $self = shift;
join ",", ($self->{"data_loss_prevention.visible_region.left"},
$self->{"data_loss_prevention.visible_region.top"},
$self->{"data_loss_prevention.visible_region.right"},
$self->{"data_loss_prevention.visible_region.bottom"}
);
}
}),
KasmVNC::CliOption->new({
name => 'DLP_RegionAllowClick',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.visible_region.concealed_region.allow_click_down",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'DLP_RegionAllowRelease',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.visible_region.concealed_region.allow_click_release",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'DLP_ClipDelay',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.clipboard.delay_between_operations",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(none|\d+)$/,
errorMessage => "must be 'none' or a number in milliseconds"
}),
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if ($value eq "none") {
$value = 0;
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'SendCutText',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.clipboard.server_to_client.enabled",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'DLP_ClipSendMax',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.clipboard.server_to_client.size",
validator => $clipboardSizeValidator
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if ($value eq "unlimited") {
$value = 0;
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'SendPrimary',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.clipboard.server_to_client.primary_clipboard_enabled",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'AcceptCutText',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.clipboard.client_to_server.enabled",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'DLP_ClipAcceptMax',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.clipboard.client_to_server.size",
validator => $clipboardSizeValidator
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if ($value eq "unlimited") {
$value = 0;
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'AcceptKeyEvents',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.keyboard.enabled",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'DLP_KeyRateLimit',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.keyboard.rate_limit",
validator => $clipboardSizeValidator
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if ($value eq "unlimited") {
$value = 0;
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'DLP_Log',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.logging.level",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(off info verbose)]
})
})
]
}),
KasmVNC::CliOption->new({
name => 'FrameRate',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.max_frame_rate",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'DynamicQualityMin',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.rect_encoding_mode.min_quality",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'DynamicQualityMax',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.rect_encoding_mode.max_quality",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'TreatLossless',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.rect_encoding_mode.consider_lossless_quality",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'RectThreads',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.rect_encoding_mode.rectangle_compress_threads",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(auto|\d+)$/,
errorMessage => "must be 'auto' or a number in milliseconds"
}),
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if ($value eq "auto") {
$value = 0;
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'JpegVideoQuality',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.jpeg_quality",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'WebpVideoQuality',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.webp_quality",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'MaxVideoResolution',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.max_resolution.width",
type => KasmVNC::ConfigKey::INT
}),
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.max_resolution.height",
type => KasmVNC::ConfigKey::INT
})
],
deriveValueSub => sub {
$self = shift;
$self->{'encoding.video_encoding_mode.max_resolution.width'} . "x"
. $self->{'encoding.video_encoding_mode.max_resolution.height'};
}
}),
KasmVNC::CliOption->new({
name => 'VideoTime',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.enter_video_encoding_mode.time_threshold",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'VideoArea',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.enter_video_encoding_mode.area_threshold",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(\d+%)$/,
errorMessage => "must be a number, followed by %"
}),
})
],
deriveValueSub => sub {
$self = shift;
my $value = $self->configValue();
$value =~ s/%$//;
$value;
}
}),
KasmVNC::CliOption->new({
name => 'VideoOutTime',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.exit_video_encoding_mode.time_threshold",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'PrintVideoArea',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.logging.level",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(off info)]
})
})
],
deriveValueSub => sub {
$self = shift;
my $value = $self->configValue();
switch($value) {
case 'off' { return 0 }
case 'info' { return 1 }
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'VideoScaling',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.video_encoding_mode.scaling_algorithm",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(nearest bilinear progressive_bilinear)]
})
})
],
deriveValueSub => sub {
$self = shift;
my $value = $self->configValue();
switch($value) {
case 'nearest' { return 0 }
case 'bilinear' { return 1 }
case 'progressive_bilinear' { return 2 }
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'CompareFB',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.compare_framebuffer",
validator => KasmVNC::EnumValidator->new({
allowedValues => [qw(off always auto)]
})
})
],
deriveValueSub => sub {
$self = shift;
my $value = $self->configValue();
switch($value) {
case 'off' { return 0 }
case 'always' { return 1 }
case 'auto' { return 2 }
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'ZlibLevel',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.zrle_zlib_level",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(auto|[0-9])$/,
errorMessage => "must be 'auto' or a number in 0..9"
}),
})
],
isActiveSub => sub {
$self = shift;
my $value = $self->configValue();
isPresent($value) && $value ne "auto";
}
}),
KasmVNC::CliOption->new({
name => 'ImprovedHextile',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.hextile_improved_compression",
type => KasmVNC::ConfigKey::BOOLEAN
})
]
}),
KasmVNC::CliOption->new({
name => 'httpd',
configKeys => [
KasmVNC::ConfigKey->new({
name => "server.advanced.httpd_directory",
type => KasmVNC::ConfigKey::ANY
})
]
}),
KasmVNC::CliOption->new({
name => 'IgnoreClientSettingsKasm',
configKeys => [
KasmVNC::ConfigKey->new({
name => "runtime_configuration.allow_client_to_override_kasm_server_settings",
type => KasmVNC::ConfigKey::BOOLEAN
})
],
deriveValueSub => sub {
$self = shift;
my $value = $self->configValue();
switch($value) {
case 'true' {
$value = 0;
}
case 'false' {
$value = 1;
}
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'fp',
configKeys => [
KasmVNC::ConfigKey->new({
name => "server.advanced.x_font_path",
type => KasmVNC::ConfigKey::ANY
})
],
deriveValueSub => sub {
$self = shift;
my $value = $self->configValue();
return $value if isPresent($value) && $value ne 'auto';
$fontPath;
},
isActiveSub => sub {
my $self = shift;
my $value = $self->configValue();
return 1 if isPresent($value) && $value ne 'auto';
$fontPath;
}
}),
KasmVNC::CliOption->new({
name => 'KasmPasswordFile',
configKeys => [
KasmVNC::ConfigKey->new({
name => "server.advanced.kasm_password_file",
type => KasmVNC::ConfigKey::ANY
})
]
}),
KasmVNC::CliOption->new({
name => 'MaxDisconnectionTime',
configKeys => [
KasmVNC::ConfigKey->new({
name => "server.auto_shutdown.no_user_session_timeout",
validator => $secondsValidator
})
],
deriveValueSub => \&deriveSeconds
}),
KasmVNC::CliOption->new({
name => 'MaxConnectionTime',
configKeys => [
KasmVNC::ConfigKey->new({
name => "server.auto_shutdown.active_user_session_timeout",
validator => $secondsValidator
})
],
deriveValueSub => \&deriveSeconds
}),
KasmVNC::CliOption->new({
name => 'MaxIdleTime',
configKeys => [
KasmVNC::ConfigKey->new({
name => "server.auto_shutdown.inactive_user_session_timeout",
validator => $secondsValidator
})
],
deriveValueSub => \&deriveSeconds
}),
KasmVNC::CliOption->new({
name => 'auth',
configKeys => [
KasmVNC::ConfigKey->new({
name => "server.advanced.x_authority_file",
type => KasmVNC::ConfigKey::ANY
})
],
deriveValueSub => sub {
$self = shift;
my $value = $self->configValue();
return $value if isPresent($value) && $value ne 'auto';
$xauthorityFile;
},
isActiveSub => sub { 1; }
}),
KasmVNC::CliOption->new({
name => 'desktop',
configKeys => [
KasmVNC::ConfigKey->new({
name => "legacy.desktop_name",
type => KasmVNC::ConfigKey::ANY
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if (isBlank($value) || $value eq "default") {
$desktopName = DefaultDesktopName();
return $desktopName;
}
$desktopName = $value;
},
isActiveSub => sub { 1; }
}),
KasmVNC::CliOption->new({
name => 'AllowOverride',
configKeys => [
KasmVNC::ConfigKey->new({
name => "runtime_configuration.allow_override_standard_vnc_server_settings",
type => KasmVNC::ConfigKey::BOOLEAN
}),
KasmVNC::ConfigKey->new({
name => "runtime_configuration.allow_override_list",
validator => $allConfigKeysValidatorSub
})
],
deriveValueSub => sub {
$self = shift;
my @overrideList = @{
listify($self->{'runtime_configuration.allow_override_list'})
};
my @cliOptionList = map { cliOptionForConfigKey($_) } @overrideList;
@cliOptionList = map { $_->{name} } @cliOptionList;
join ",", @cliOptionList;
},
isActiveSub => sub {
$self = shift;
my $allowOverride = $self->{'runtime_configuration.allow_override_standard_vnc_server_settings'};
return unless defined($allowOverride);
$allowOverride eq "true";
}
}),
KasmVNC::CliOption->new({
name => 'DLP_ClipTypes',
configKeys => [
KasmVNC::ConfigKey->new({
name => "data_loss_prevention.clipboard.allow_mimetypes",
type => KasmVNC::ConfigKey::ANY
})
]
}),
KasmVNC::CliOption->new({
name => 'QueryConnectTimeout',
configKeys => [
KasmVNC::ConfigKey->new({
name => "user_session.concurrent_connections_prompt_timeout",
type => KasmVNC::ConfigKey::INT
})
]
}),
KasmVNC::CliOption->new({
name => 'PublicIP',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.udp.public_ip",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(auto|$ipv4_regexp|$ipv6_regexp)$/,
errorMessage => "must be 'auto' or a valid IPv4 or IPv6 address"
}),
})
],
isActiveSub => sub {
$self = shift;
my $value = $self->configValue();
isPresent($value) && $value ne 'auto';
}
}),
KasmVNC::CliOption->new({
name => 'udpFullFrameFrequency',
configKeys => [
KasmVNC::ConfigKey->new({
name => "encoding.full_frame_updates",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(none|\d+)$/,
errorMessage => "must be 'none' or an integer"
}),
})
],
deriveValueSub => sub {
my $self = shift;
my $value = $self->configValue();
if ($value eq "none") {
$value = 0;
}
$value;
}
}),
KasmVNC::CliOption->new({
name => 'udpPort',
configKeys => [
KasmVNC::ConfigKey->new({
name => "network.udp.port",
validator => KasmVNC::PatternValidator->new({
pattern => qr/^(auto|\d+)$/,
errorMessage => "must be 'auto' or an integer"
}),
})
],
isActiveSub => sub {
$self = shift;
my $value = $self->configValue();
isPresent($value) && $value ne 'auto';
}
}),
);
%cliArgMap = map { ("-" . $_->{name}) => $_ } @xvncOptions;
%configKeyToXvncOptionMap = map {
my $option = $_;
map { $_->{name} => $option } @{ $option->{configKeys} };
} @xvncOptions;
# my $xvncDoc = "./Xvnc.md";
# open(FH, '<', $xvncDoc) or die $!;
# while(<FH>){
# if (m/\* \*\*-(\w+)/) {
# my $optionName = $1;
# if ($optionName) {
# $optionName = "-$optionName";
# my $cliOption = $cliArgMap{$optionName};
# if ($cliOption) {
# my @keys = @{ $cliOption->configKeyNames() };
# say '### ' . join(", ", @keys);
# }
# }
# }
# print $_;
# }
# close(FH);
# exit 0;
}
sub PromptingAllowed {
$appSettings{prompt}
}
sub PromptingDisabled {
!PromptingAllowed();
}
sub cliOptionForConfigKey {
my $configKey = shift;
my $cliOptionForConfigKey = first { $_->hasKey($configKey) } @xvncOptions;
}
sub deriveSeconds {
my $self = shift;
my $value = $self->configValue();
return 0 if $value eq 'never';
$value;
}
sub deriveFromConfigAndLocalCli {
my $self = shift;
my $cliOptionName = "-" . $self->{name};
my $cliOptionValue = $opt{$cliOptionName};
my $configValue = deriveBoolean($self->configValue());
return $configValue unless defined($cliOptionValue);
$cliOptionValue;
}
sub ParseAndProcessCliOptions {
my @supportedOptions = ("-geometry",1,"-kill",1,"-help",0,"-h",0,"--help",0,"-fp",1,"-list",0,"-fg",0,"-autokill",0,"-noxstartup",0,"-xstartup",1,"-select-de",OPTIONAL_ARG_VALUE, "-interface", REQUIRED_ARG_VALUE, '-debug', NO_ARG_VALUE, '-websocketPort', REQUIRED_ARG_VALUE, "-dry-run", NO_ARG_VALUE, '-config', REQUIRED_ARG_VALUE, '-test-output-topic', REQUIRED_ARG_VALUE, '-prompt', REQUIRED_ARG_VALUE);
@vncserverOptions = (
KasmVNC::CliOption->new({
name => 'prompt',
configKeys => [
KasmVNC::ConfigKey->new({
name => "command_line.prompt",
type => KasmVNC::ConfigKey::BOOLEAN
})
],
deriveValueSub => \&deriveFromConfigAndLocalCli
})
);
ParseOptionsAndRemoveMatchesFromARGV(@supportedOptions);
ProcessCliOptions();
CheckGeometryAndDepthAreSensible();
$displayNumber = DetectDisplayNumberFromCliArgs();
if (!defined($displayNumber)) {
$displayNumber = GetLowestAvailableDisplayNumber();
}
CheckCliOptionsForBeingValid();
}
sub CheckBrowserHostDefined {
return if IsDryRun();
scalar DeduceBrowserHosts() > 0 || \
die "-interface has no default value and wasn't passed by user";
}
sub DefaultDesktopName {
"$host:$displayNumber ($systemUser)";
}
sub GenerateWebsocketPortFromDisplayNumber {
$defaultWebsocketPort + $displayNumber;
}
sub LoadUsers {
$users = KasmVNC::Users->loadFrom($kasmPasswdFile);
}
sub EnsureAtLeastOneKasmUserExists {
return if IsDryRun();
LoadUsers();
unless (PromptingAllowed()) {
return unless $users->is_empty();
$logger->warn(<<TEXT);
No users configured and prompting is prohitibed, exiting.
Use vncpasswd(1) to add a user or enable command_line.prompt in config.
TEXT
exit 1;
}
return if AtLeastOneUserWithWriteAccessConfigured();
GuideUserToAddWritePermissionsToExistingUser();
$users->reload();
}
sub GuideUserToAddWritePermissionsToExistingUser {
my @options = ();
my @users = sort $users->users();
foreach my $user (@users) {
my $name = $user->name();
push(@options, KasmVNC::TextOption->new({
description =>
"Provide user '$name' with write access",
callback => sub {
$users->addPermissions($name, "w");
say "Added write permissions for user '$name'";
}
}));
}
push(@options, KasmVNC::TextOption->new({
description => "Create a new user with write access",
callback => sub {
GuideUserToSetupKasmPasswdUser();
$users->reload();
}
}));
push(@options, KasmVNC::TextOption->new({
description => "Start KasmVNC without a user with write access"
}));
my $banner = <<"NEEDTOADDWRITEPERMISSIONS";
In order to control your desktop, you need a KasmVNC user with write
permissions. Select what action to take:
NEEDTOADDWRITEPERMISSIONS
my $option = askUserToChooseOption(
banner => $banner,
prompt => 'Provide selection number',
options => \@options,
);
&{ $option->callback() }();
}
sub AtLeastOneUserWithWriteAccessConfigured {
$users->findByPermissions("w") > 0;
}
sub ShouldPrintTopic {
my $topic = shift;
return 1 unless ($testOutputTopic);
return 1 if ($testOutputTopic eq "all");
$topic eq $testOutputTopic;
}
sub SupportedAbsoluteKeys {
my @supportedAbsoluteKeys =
map { $_->configKeyNames() } @allCliOptions;
@supportedAbsoluteKeys = flatten(@supportedAbsoluteKeys);
my %result = map { $_ => 1 } @supportedAbsoluteKeys;
\%result;
}
sub SupportedSectionsFromAbsoluteKey {
my $absoluteKey = shift;
my @sections = ();
return @sections unless ($absoluteKey =~ /\./);
while ($absoluteKey =~ /\./) {
$absoluteKey =~ s/\.[^\.]+$//;
push @sections, $absoluteKey;
}
push @sections, $absoluteKey;
@sections;
}
sub StartXvncOrExit {
$cmd = ConstructXvncCmd();
CheckForUnsupportedConfigKeys();
CheckSslCertReadable();
say $cmd if ($debug || IsDryRun()) && ShouldPrintTopic("xvnc-cmd");
exit(0) if IsDryRun();
CheckBrowserHostDefined();
DeleteLogLeftFromPreviousXvncRun();
StartXvncAndRecordPID();
WaitForXvncToRespond();
if (!IsXvncRunning() && !UsingSafeFontPath()) {
StartXvncWithSafeFontPath();
WaitForXvncToRespond();
}
unless (IsXvncRunning()) {
WarnUserXvncNotStartedAndExit();
}
}
sub WaitForTimeLimitOrSubReturningTrue {
my ($timeLimit, $sub) = @_;
my $sleepSlice = 0.05;
my $sleptFor = 0;
until (&$sub() || $sleptFor >= $timeLimit) {
sleep($sleepSlice);
$sleptFor += $sleepSlice;
}
}
sub IsProcessRunning {
my $pid = shift;
unless ($pid) { return 0 };
kill 0, $pid;
}
sub DefineLogAndPidFilesForDisplayNumber {
$desktopLog = "$vncUserDir/$host:$displayNumber.log";
$pidFile = "$vncUserDir/$host:$displayNumber.pid";
}
sub PrepareLoggingAndXvncKillingFramework {
CreateDotVncDir();
DefineLogAndPidFilesForDisplayNumber();
}
sub AllowXProgramsToConnectToXvnc {
SetupXauthorityFile();
}
sub PrintLogFilenameAndConfiguredUsersAndStuff {
$logger->warn("\nNew '$desktopName' desktop is $host:$displayNumber");
PrintKasmUsers();
$logger->warn("Log file is $desktopLog\n");
}
sub PrintBrowserUrl {
my $browserUrls = ConstructBrowserUrl();
$logger->warn("\nPaste this url in your browser:\n$browserUrls");
}
sub IsAllInterfaces {
my $interface = shift;
$interface eq "0.0.0.0";
}
sub DeduceBrowserHosts {
my @browserHosts;
my $interface = $opt{"-interface"} || $optFromConfig{"-interface"};
if (IsAllInterfaces($interface)) {
@browserHosts = @hostIPs;
} else {
@browserHosts = ($interface);
}
@browserHosts;
}
sub ConstructBrowserUrl {
my @browserHosts = DeduceBrowserHosts();
my $browserPort = $opt{"-websocketPort"} || $optFromConfig{"-websocketPort"};
my @urls = map { "https://$_:$browserPort" } @browserHosts;
join "\n", @urls;
}
sub IsThisSystemBinary {
$0 =~ m!^/usr!;
}
sub DetectSelectDeBin {
if (IsThisSystemBinary()) {
"/usr/lib/kasmvncserver/select-de.sh";
} else {
LocalSelectDePath();
}
}
sub LocalSelectDePath {
my $dirname = dirname($0);
"$dirname/../builder/startup/deb/select-de.sh";
}
sub IsDryRun {
$opt{"-dry-run"};
}
sub LoadConfig {
my $filename = shift;
return if IsConfigOptionalAndNotReadable($filename);
my $config = KasmVNC::Config->new({ filename => $filename });
$config;
}
sub FailIfConfigNotReadable {
my $config = shift;
-r $config || die "Couldn't load config: $config";
}
sub IsConfigOptionalAndNotReadable {
my $config = shift;
$config eq $vncUserConfig && ! -r $config;
}
sub TrimEmptyNodes {
my $config = shift;
my @supportedSections = @{ listify(SupportedSections()) };
my @sectionsToCheck = reverse sort @supportedSections;
foreach my $section (@sectionsToCheck) {
if ($config->isEmpty($section)) {
$config->delete($section);
}
}
}
sub ConfigValue {
my ($absoluteKey, $configRef) = @_;
$configRef ||= $mergedConfig;
return $configRef->get($absoluteKey);
}
sub DerivedValue {
my $absoluteKey = shift;
$configKeyToXvncOptionMap{$absoluteKey}->toValue();
}
sub LoadConfigs {
@allCliOptions = (@xvncOptions, @vncserverOptions);
my @configs = map { LoadConfig $_ } @configFiles;
foreach my $config (@configs) {
TrimEmptyNodes($config);
}
$mergedConfig = KasmVNC::Config::merge(@configs);
}
sub SupportedSections {
my %supportedAbsoluteKeys = %{ SupportedAbsoluteKeys() };
my @supportedSections = map { SupportedSectionsFromAbsoluteKey($_) }
(keys %supportedAbsoluteKeys);
@supportedSections = uniq(flatten(@supportedSections));
@supportedSections;
}
sub EmptySectionsDefinedInConfig {
my @supportedSections = @{ listify(SupportedSections()) };
my %configAbsoluteKeys = %{ ConfigAbsoluteKeys() };
my @emptySections = grep($configAbsoluteKeys{$_} && isBlank(ConfigValue($_)),
@supportedSections);
uniq @emptySections;
}
sub ConfigAbsoluteKeys {
my %configAbsoluteKeys = map { $_ => 1 }
(ConfigToAbsoluteKeyList("", $mergedConfig->{data}));
\%configAbsoluteKeys;
}
sub CheckForUnsupportedConfigKeys {
my %supportedAbsoluteKeys = %{ SupportedAbsoluteKeys() };
my @configAbsoluteKeys = ConfigToAbsoluteKeyList("", $mergedConfig->{data});
my @unsupportedAbsoluteKeys =
grep(!defined($supportedAbsoluteKeys{$_}), @configAbsoluteKeys);
return if (scalar @unsupportedAbsoluteKeys == 0);
if (ShouldPrintTopic("validation")) {
$logger->warn("Unsupported config keys found:");
$logger->warn(join("\n", @unsupportedAbsoluteKeys));
$logger->warn();
}
exit 1;
}
sub ConstructOptFromConfig{
my %result;
foreach my $cliOption (values %cliArgMap) {
my $cliArg = "-$cliOption->{name}";
next if WasOptionSpecifiedViaCli($cliArg);
my $optionValue = $cliOption->toValue();
next unless defined($cliOption->toString());
$result{$cliArg} = $optionValue;
}
\%result;
}
sub ConfigToCmd {
ValidateConfig();
%optFromConfig = %{ ConstructOptFromConfig() };
my @cmd = map { $cliArgMap{$_}->toString() } (keys %optFromConfig);
" " . join " ", @cmd;
}
sub ValidateConfig {
foreach my $cliOption (@allCliOptions) {
ValidateCliOption($cliOption);
}
}
sub ValidateCliOption {
my $cliOption = $_[0];
return if ($cliOption->isValid());
if (ShouldPrintTopic("validation")) {
$logger->warn("config errors:");
$logger->warn($cliOption->errorMessages());
$logger->warn();
}
exit 1;
}
sub ConfigToAbsoluteKeyList {
my $keyPrefix = $_[0];
my %configPart = %{ $_[1] };
my @absoluteKeys;
foreach my $key (keys %configPart) {
my $absoluteKey;
if ($keyPrefix) {
$absoluteKey = "$keyPrefix.$key";
} else {
$absoluteKey = $key;
}
if (!defined($configPart{$key})) {
push @absoluteKeys, $absoluteKey;
next;
}
if (ref $configPart{$key} ne "HASH") {
push @absoluteKeys, $absoluteKey;
next;
}
push @absoluteKeys,
ConfigToAbsoluteKeyList($absoluteKey, \% { $configPart{$key} });
}
@absoluteKeys;
}
sub ActivateConfigToCLIConversion {
foreach my $option (@xvncOptions){
$option->activate();
}
}
sub SetAppSettingsFromConfigAndCli {
foreach my $option (@vncserverOptions) {
my $value = $option->deriveValue();
$appSettings{$option->{name}} = $value;
}
}
sub InitLogger {
$logger = KasmVNC::Logger->new();
}
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