/usr/share/perl5/INetSim/Ident.pm is in inetsim 1.2.7+dfsg.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | # -*- perl -*-
#
# INetSim::Ident - A fake Ident server
#
# RFC 1413 - Identification Protocol
#
# (c)2007-2009 Matthias Eckert, Thomas Hungenberg
#
# Version 0.47 (2009-10-30)
#
# For history/changelog see bottom of this file.
#
#############################################################
package INetSim::Ident;
use strict;
use warnings;
use base qw(INetSim::GenericServer);
my %LPORT = ( 7 => "inetd",
9 => "inetd",
13 => "inetd",
17 => "inetd",
19 => "inetd",
20 => "ftp",
21 => "ftp",
25 => "postfix",
37 => "inetd",
53 => "named",
80 => "www-data",
113 => "identd",
443 => "www-data",
515 => "lpr",
8080 => "proxy"
);
sub configure_hook {
my $self = shift;
$self->{server}->{host} = &INetSim::Config::getConfigParameter("Default_BindAddress"); # bind to address
$self->{server}->{port} = &INetSim::Config::getConfigParameter("Ident_BindPort"); # bind to port
$self->{server}->{proto} = 'tcp'; # TCP protocol
$self->{server}->{user} = &INetSim::Config::getConfigParameter("Default_RunAsUser"); # user to run as
$self->{server}->{group} = &INetSim::Config::getConfigParameter("Default_RunAsGroup"); # group to run as
$self->{server}->{setsid} = 0; # do not daemonize
$self->{server}->{no_client_stdout} = 1; # do not attach client to STDOUT
$self->{server}->{log_level} = 0; # do not log anything
$self->{servicename} = &INetSim::Config::getConfigParameter("Ident_ServiceName");
$self->{max_childs} = &INetSim::Config::getConfigParameter("Default_MaxChilds");
$self->{timeout} = &INetSim::Config::getConfigParameter("Default_TimeOut");
}
sub pre_loop_hook {
my $self = shift;
$0 = "inetsim_$self->{servicename}";
&INetSim::Log::MainLog("started (PID $$)", $self->{servicename});
}
sub pre_server_close_hook {
my $self = shift;
&INetSim::Log::MainLog("stopped (PID $$)", $self->{servicename});
}
sub fatal_hook {
my $self = shift;
&INetSim::Log::MainLog("failed!", $self->{servicename});
exit 0;
}
sub process_request {
my $self = shift;
my $client = $self->{server}->{client};
my $rhost = $self->{server}->{peeraddr};
my $rport = $self->{server}->{peerport};
my $stat_success = 0;
my ($s_port, $c_port);
&INetSim::Log::SubLog("[$rhost:$rport] connect", $self->{servicename}, $$);
if ($self->{server}->{numchilds} >= $self->{max_childs}) {
print $client "Maximum number of connections ($self->{max_childs}) exceeded.\n";
&INetSim::Log::SubLog("[$rhost:$rport] Connection refused - maximum number of connections ($self->{max_childs}) exceeded.", $self->{servicename}, $$);
}
else {
eval {
local $SIG{'ALRM'} = sub { die "TIMEOUT" };
alarm($self->{timeout});
while (my $line = <$client>){
$line =~ s/[\r\n]+$//g;
$line =~ s/[\s\t]+//g;
alarm($self->{timeout});
&INetSim::Log::SubLog("[$rhost:$rport] recv: ".$line, $self->{servicename}, $$);
if ($line =~ /^\d{1,5}\,\d{1,5}\z/) {
($s_port, $c_port) = split(/\,/, $line);
if ($s_port >= 1 && $s_port <= 65535 && $c_port >= 1 && $c_port <= 65535) {
my $out;
if (defined $LPORT{$s_port} && $LPORT{$s_port}) {
$out = "$s_port , $c_port : USERID : UNIX : $LPORT{$s_port}";
}
elsif ($s_port <= 1024) {
$out = "$s_port , $c_port : USERID : UNIX : root";
}
else {
$out = "$s_port , $c_port : USERID : UNIX : nobody";
}
print $client "$out\r\n";
&INetSim::Log::SubLog("[$rhost:$rport] send: $out", $self->{servicename}, $$);
$stat_success = 1;
}
else {
print $client "$s_port , $c_port : ERROR : INVALID-PORT\r\n";
&INetSim::Log::SubLog("[$rhost:$rport] send: $s_port , $c_port : ERROR : INVALID-PORT", $self->{servicename}, $$);
}
}
elsif ($line =~ /^QUIT$/i) {
last;
}
else {
print $client "0 , 0 : ERROR : UNKNOWN-ERROR\r\n";
&INetSim::Log::SubLog("[$rhost:$rport] send: 0 , 0 : ERROR : UNKNOWN-ERROR", $self->{servicename}, $$);
last;
}
alarm($self->{timeout});
}
alarm(0);
};
}
if ($@ =~ /TIMEOUT/) {
&INetSim::Log::SubLog("[$rhost:$rport] disconnect (timeout)", $self->{servicename}, $$);
}
else {
&INetSim::Log::SubLog("[$rhost:$rport] disconnect", $self->{servicename}, $$);
}
if ($stat_success == 1) {
&INetSim::Log::SubLog("[$rhost:$rport] stat: $stat_success lport=$s_port rport=$c_port", $self->{servicename}, $$);
}
else {
&INetSim::Log::SubLog("[$rhost:$rport] stat: $stat_success", $self->{servicename}, $$);
}
}
1;
#############################################################
#
# History:
#
# Version 0.47 (2009-10-30) me
# - improved some code parts
#
# Version 0.46 (2008-08-27) me
# - added logging of process id
#
# Version 0.45 (2008-03-25) me
# - changed timeout handling
#
# Version 0.44 (2008-03-19) me
# - added timeout after inactivity of n seconds, using new
# config parameter Default_TimeOut
#
# Version 0.43 (2007-12-31) th
# - change process name
#
# Version 0.42 (2007-05-08) th
# - replace non-printable characters with "." in recvmsg
#
# Version 0.41 (2007-04-26) th
# - use getConfigParameter
#
# Version 0.4 (2007-04-21) me
# - small bugfixes with variables
# - added handling of quit
# - added logging of status for use with &INetSim::Report::GenReport()
#
# Version 0.3 (2007-04-19) me
# - changed check for MaxChilds, BindAddress, RunAsUser and
# RunAsGroup
#
# Version 0.2 (2007-03-27) th
# - rewrote module to use INetSim::GenericServer
#
# Version 0.11 (2007-03-19) th
# - fixed problem with uninitialized value of $recvmsg
#
# Version 0.1 (2007-03-18) me
#
#############################################################
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