/usr/share/perl5/INetSim/HTTP.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.
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#
# INetSim::HTTP - An HTTP server with real and fake mode
#
# RFC 2616 and others - HYPERTEXT TRANSFER PROTOCOL (HTTP)
#
# (c)2007-2014 Thomas Hungenberg, Matthias Eckert
#
# Version 0.77 (2014-05-23)
#
# For history/changelog see bottom of this file.
#
#############################################################
package INetSim::HTTP;
use strict;
use warnings;
use base qw(INetSim::GenericServer);
use Digest::SHA;
my $SSL = 0;
eval { require IO::Socket::SSL; };
if (! $@) { $SSL = 1; };
my $RE_validIPPort = qr/^(([01]?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.){3}([01]?[0-9][0-9]?|2[0-4][0-9]|25[0-5])(\:[0-9]{1,5}|)$/;
my $RE_validHostnamePort = qr/^[a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9]|)(\:[0-9]{1,5}|)$/;
my $RE_validFQDNHostnamePort = qr/^([a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9]|)\.)+[a-zA-Z]+(\:[0-9]{1,5}|)$/;
sub configure_hook {
my $self = shift;
my $server = $self->{server};
$self->{server}->{host} = &INetSim::Config::getConfigParameter("Default_BindAddress"); # bind to address
$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
# cert directory
$self->{cert_dir} = &INetSim::Config::getConfigParameter("CertDir");
if (defined $self->{server}->{'SSL'} && $self->{server}->{'SSL'}) {
$self->{servicename} = &INetSim::Config::getConfigParameter("HTTPS_ServiceName");
if (! $SSL) {
&INetSim::Log::MainLog("failed! Library IO::Socket::SSL not installed", $self->{servicename});
exit 1;
}
$self->{ssl_key} = $self->{cert_dir} . (defined &INetSim::Config::getConfigParameter("HTTPS_KeyFileName") ? &INetSim::Config::getConfigParameter("HTTPS_KeyFileName") : &INetSim::Config::getConfigParameter("Default_KeyFileName"));
$self->{ssl_crt} = $self->{cert_dir} . (defined &INetSim::Config::getConfigParameter("HTTPS_CrtFileName") ? &INetSim::Config::getConfigParameter("HTTPS_CrtFileName") : &INetSim::Config::getConfigParameter("Default_CrtFileName"));
$self->{ssl_dh} = (defined &INetSim::Config::getConfigParameter("HTTPS_DHFileName") ? &INetSim::Config::getConfigParameter("HTTPS_DHFileName") : &INetSim::Config::getConfigParameter("Default_DHFileName"));
if (! -f $self->{ssl_key} || ! -r $self->{ssl_key} || ! -f $self->{ssl_crt} || ! -r $self->{ssl_crt} || ! -s $self->{ssl_key} || ! -s $self->{ssl_crt}) {
&INetSim::Log::MainLog("failed! Unable to read SSL certificate files", $self->{servicename});
exit 1;
}
#
$self->{ssl_enabled} = 1;
$self->{server}->{port} = &INetSim::Config::getConfigParameter("HTTPS_BindPort"); # bind to port
$self->{http_version} = &INetSim::Config::getConfigParameter("HTTPS_Version");
$self->{http_fakemode} = &INetSim::Config::getConfigParameter("HTTPS_FakeMode");
$self->{mimetypes_filename} = &INetSim::Config::getConfigParameter("HTTPS_MIMETypesFileName");
$self->{document_root} = &INetSim::Config::getConfigParameter("HTTPS_DocumentRoot");
$self->{fakeFileDir} = &INetSim::Config::getConfigParameter("HTTPS_FakeFileDir");
$self->{postdata_dirname} = &INetSim::Config::getConfigParameter("HTTPS_POSTDataDir");
$self->{fakefile_exttoname} = &INetSim::Config::getConfigParameter("HTTPS_FakeFileExtToName");
$self->{fakefile_exttomimetype} = &INetSim::Config::getConfigParameter("HTTPS_FakeFileExtToMIMEType");
$self->{default_fakefilename} = &INetSim::Config::getConfigParameter("HTTPS_Default_FakeFileName");
$self->{default_fakefilemimetype} = &INetSim::Config::getConfigParameter("HTTPS_Default_FakeFileMIMEType");
$self->{static_fakefile_pathtoname} = &INetSim::Config::getConfigParameter("HTTPS_Static_FakeFilePathToName");
$self->{static_fakefile_pathtomimetype} = &INetSim::Config::getConfigParameter("HTTPS_Static_FakeFilePathToMIMEType");
}
else {
$self->{servicename} = &INetSim::Config::getConfigParameter("HTTP_ServiceName");
$self->{ssl_key} = $self->{cert_dir} . (defined &INetSim::Config::getConfigParameter("HTTP_KeyFileName") ? &INetSim::Config::getConfigParameter("HTTP_KeyFileName") : &INetSim::Config::getConfigParameter("Default_KeyFileName"));
$self->{ssl_crt} = $self->{cert_dir} . (defined &INetSim::Config::getConfigParameter("HTTP_CrtFileName") ? &INetSim::Config::getConfigParameter("HTTP_CrtFileName") : &INetSim::Config::getConfigParameter("Default_CrtFileName"));
$self->{ssl_dh} = (defined &INetSim::Config::getConfigParameter("HTTP_DHFileName") ? &INetSim::Config::getConfigParameter("HTTP_DHFileName") : &INetSim::Config::getConfigParameter("Default_DHFileName"));
$self->{ssl_enabled} = 0;
$self->{server}->{port} = &INetSim::Config::getConfigParameter("HTTP_BindPort"); # bind to port
$self->{http_version} = &INetSim::Config::getConfigParameter("HTTP_Version");
$self->{http_fakemode} = &INetSim::Config::getConfigParameter("HTTP_FakeMode");
$self->{mimetypes_filename} = &INetSim::Config::getConfigParameter("HTTP_MIMETypesFileName");
$self->{document_root} = &INetSim::Config::getConfigParameter("HTTP_DocumentRoot");
$self->{fakeFileDir} = &INetSim::Config::getConfigParameter("HTTP_FakeFileDir");
$self->{postdata_dirname} = &INetSim::Config::getConfigParameter("HTTP_POSTDataDir");
$self->{fakefile_exttoname} = &INetSim::Config::getConfigParameter("HTTP_FakeFileExtToName");
$self->{fakefile_exttomimetype} = &INetSim::Config::getConfigParameter("HTTP_FakeFileExtToMIMEType");
$self->{default_fakefilename} = &INetSim::Config::getConfigParameter("HTTP_Default_FakeFileName");
$self->{default_fakefilemimetype} = &INetSim::Config::getConfigParameter("HTTP_Default_FakeFileMIMEType");
$self->{static_fakefile_pathtoname} = &INetSim::Config::getConfigParameter("HTTP_Static_FakeFilePathToName");
$self->{static_fakefile_pathtomimetype} = &INetSim::Config::getConfigParameter("HTTP_Static_FakeFilePathToMIMEType");
}
# warn about missing dh file and disable
if (defined $self->{ssl_dh} && $self->{ssl_dh}) {
$self->{ssl_dh} = $self->{cert_dir} . $self->{ssl_dh};
if (! -f $self->{ssl_dh} || ! -r $self->{ssl_dh}) {
&INetSim::Log::MainLog("Warning: Unable to read Diffie-Hellman parameter file '$self->{ssl_dh}'", $self->{servicename});
$self->{ssl_dh} = undef;
}
}
$self->{maxchilds} = &INetSim::Config::getConfigParameter("Default_MaxChilds");
$self->{default_documents} = "index.html index.htm";
$self->{error_text}{100} = "Continue";
$self->{error_text}{101} = "Switching Protocols";
$self->{error_text}{200} = "OK";
$self->{error_text}{201} = "Created";
$self->{error_text}{202} = "Accepted";
$self->{error_text}{203} = "Non-Authoritative Information";
$self->{error_text}{204} = "No Content";
$self->{error_text}{205} = "Reset Content";
$self->{error_text}{206} = "Partial Content";
$self->{error_text}{300} = "Multiple Choices";
$self->{error_text}{301} = "Moved Permanently";
$self->{error_text}{302} = "Moved Temporarily";
$self->{error_text}{303} = "See Other";
$self->{error_text}{304} = "Not Modified";
$self->{error_text}{305} = "Use Proxy";
$self->{error_text}{400} = "Bad Request";
$self->{error_text}{401} = "Unauthorized";
$self->{error_text}{402} = "Payment Required";
$self->{error_text}{403} = "Forbidden";
$self->{error_text}{404} = "Not Found";
$self->{error_text}{405} = "Method Not Allowed";
$self->{error_text}{406} = "Not Acceptable";
$self->{error_text}{407} = "Proxy Authentication Required";
$self->{error_text}{408} = "Request Time-out";
$self->{error_text}{409} = "Conflict";
$self->{error_text}{410} = "Gone";
$self->{error_text}{411} = "Length Required";
$self->{error_text}{412} = "Precondition Failed";
$self->{error_text}{413} = "Request Entity Too Large";
$self->{error_text}{414} = "Request-URI Too Large";
$self->{error_text}{415} = "Unsupported Media Type";
$self->{error_text}{500} = "Internal Server Error";
$self->{error_text}{501} = "Method Not Implemented";
$self->{error_text}{502} = "Bad Gateway";
$self->{error_text}{503} = "Service Unavailable";
$self->{error_text}{504} = "Gateway Time-out";
$self->{error_text}{505} = "HTTP Version not supported";
# read mime types
if (! open (MIMEFILE, "< $self->{mimetypes_filename}")) {
&INetSim::Log::MainLog("Warning: Unable to open MIME types file '$self->{mimetypes_filename}': $!", $self->{servicename});
&INetSim::Log::MainLog("Warning: No MIME types available. Using built-in MIME types instead.", $self->{servicename});
# if mime types file is not available, set some basic mime types
$self->{mimetypes}{'htm'} = 'text/html';
$self->{mimetypes}{'html'} = 'text/html';
$self->{mimetypes}{'shtml'} = 'text/html';
}
else {
# build mime types database
my @columns;
my $mimetype;
my $extension;
while (<MIMEFILE>) {
s/^[\s]+//g; # remove leading blanks
s/[\r\n]+$//g; # remove trailing line breaks
next if /^[\#]/; # skip comments
@columns = split (/\s+/);
$mimetype = shift @columns;
next unless (@columns);
foreach $extension (@columns) {
$self->{mimetypes}{$extension} = $mimetype;
}
}
close (MIMEFILE);
}
# foreach (keys %{$self->{mimetypes}}) {
# print STDOUT "$_ $self->{mimetypes}{$_}\n";
# }
# check DocumentRoot directory
if (! -d $self->{document_root}) {
&INetSim::Log::MainLog("failed! DocumentRoot directory '$self->{document_root}' does not exist", $self->{servicename});
exit 1;
}
# check FakeFile directory
if (! -d $self->{fakeFileDir}) {
&INetSim::Log::MainLog("failed! FakeFile directory '$self->{fakeFileDir}' does not exist", $self->{servicename});
exit 1;
}
# check POST data directory
$self->{postdata_dirname} =~ /^(.*)$/; # evil untaint!
$self->{postdata_dirname} = $1;
if (! -d $self->{postdata_dirname}) {
&INetSim::Log::MainLog("failed! POST data directory '$self->{postdata_dirname}' does not exist", $self->{servicename});
exit 1;
}
my ($dev, $inode, $mode, $nlink, $uid, $gid, $rdev, $size, $atime, $mtime, $ctime, $blksize, $blocks, $grpname) = undef;
$gid = getgrnam("inetsim");
if (! defined $gid) {
&INetSim::Log::MainLog("Warning: Unable to get GID for group 'inetsim'", $self->{servicename});
}
chown -1, $gid, $self->{postdata_dirname};
($dev, $inode, $mode, $nlink, $uid, $gid, $rdev, $size, $atime, $mtime, $ctime, $blksize, $blocks) = stat $self->{postdata_dirname};
# check for group owner 'inetsim'
$grpname = getgrgid $gid;
if ($grpname ne "inetsim") {
&INetSim::Log::MainLog("Warning: Group owner of POST data directory '$self->{postdata_dirname}' is not 'inetsim' but '$grpname'", $self->{servicename});
}
# check for group r/w permissions
if ((($mode & 0060) >> 3) != 6) {
&INetSim::Log::MainLog("Warning: No group r/w permissions on POST data directory '$self->{postdata_dirname}'", $self->{servicename});
}
}
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 1;
}
sub process_request {
my $self = shift;
my $client = $self->{server}->{client};
my $rhost = $self->{server}->{peeraddr};
my $rport = $self->{server}->{peerport};
if ($self->{ssl_enabled} && ! $self->upgrade_to_ssl()) {
&INetSim::Log::SubLog("[$rhost:$rport] connect", $self->{servicename}, $$);
&INetSim::Log::SubLog("[$rhost:$rport] info: Error setting up SSL: $self->{last_ssl_error}", $self->{servicename}, $$);
&INetSim::Log::SubLog("[$rhost:$rport] disconnect", $self->{servicename}, $$);
return;
}
elsif ($self->{server}->{numchilds} >= $self->{maxchilds}) {
&INetSim::Log::SubLog("[$rhost:$rport] connect", $self->{servicename}, $$);
print $client "Maximum number of connections ($self->{maxchilds}) exceeded.\n";
&INetSim::Log::SubLog("[$rhost:$rport] Connection refused - maximum number of connections ($self->{maxchilds}) exceeded.", $self->{servicename}, $$);
&INetSim::Log::SubLog("[$rhost:$rport] disconnect", $self->{servicename}, $$);
return;
}
&INetSim::Log::SubLog("[$rhost:$rport] connect", $self->{servicename}, $$);
$self->{http_request}{method} = "";
$self->{http_request}{request_uri} = "";
$self->{http_request}{request_uri_orig} = "";
$self->{http_request}{request_uri_decoded} = undef;
$self->{http_request}{version} = "";
$self->{http_request}{headers} = ();
$self->{http_request}{pathfile} = "";
$self->{postdata_pathfile} = "";
$self->{http_response}{body} = "";
$self->{http_response}{status} = 0;
$self->{http_response}{errormessage} = "";
$self->{http_response}{filename} = "";
$self->{http_response}{headers} = {};
$self->{http_response}{headers}{'Connection'} = "Close";
$self->{http_response}{headers}{'Server'} = $self->{http_version};
# read HTTP request
if ($self->read_http_request) {
if ($self->{http_response}{status}) {
# error in processing request header
$self->send_http_response;
}
else {
# log requested URL
my $fullreq;
if (($self->{http_request}{request_uri_orig} !~ /^https?:\/\//) && (defined $self->{http_request}{headers}{'Host'})) {
if ($self->{ssl_enabled}) {
$fullreq = "https://" . $self->{http_request}{headers}{'Host'} . $self->{http_request}{request_uri_orig};
}
else {
$fullreq = "http://" . $self->{http_request}{headers}{'Host'} . $self->{http_request}{request_uri_orig};
}
}
else {
$fullreq = $self->{http_request}{request_uri_orig};
}
# replace non-printable characters with "<NP>" before logging
$fullreq =~ s/[^\x20-\x7e]/\<NP\>/g;
&INetSim::Log::SubLog("[$rhost:$rport] info: Request URL: $fullreq", $self->{servicename}, $$);
# if request contains hex encoded chars, log decoded request
if (defined $self->{http_request}{request_uri_decoded}) {
if (($self->{http_request}{request_uri_orig} !~ /^https?:\/\//) && (defined $self->{http_request}{headers}{'Host'})) {
if ($self->{ssl_enabled}) {
$fullreq = "https://" . $self->{http_request}{headers}{'Host'} . $self->{http_request}{request_uri_decoded};
}
else {
$fullreq = "http://" . $self->{http_request}{headers}{'Host'} . $self->{http_request}{request_uri_decoded};
}
}
else {
$fullreq = $self->{http_request}{request_uri_decoded};
}
# replace non-printable characters with "<NP>" before logging
$fullreq =~ s/[^\x20-\x7e]/\<NP\>/g;
&INetSim::Log::SubLog("[$rhost:$rport] info: Decoded URL: $fullreq", $self->{servicename}, $$);
}
# for HEAD/GET/POST requests read fake/real file
if (($self->{http_request}{method} eq "HEAD") || ($self->{http_request}{method} eq "GET") || ($self->{http_request}{method} eq "POST")) {
if($self->{http_fakemode}) {
if (defined $self->{http_request}{headers}{Host} && $self->{http_request}{headers}{Host} =~ /^checkip\.dyndns\.(org|com)/i) {
$self->fake_dyndns;
}
elsif (defined ($fullreq) && ($fullreq =~ /.*\/wpad.dat$/i || $fullreq =~ /.*\/proxy.pac$/i)) {
$self->send_wpadfile;
}
else {
$self->read_fakefile;
}
}
else {
$self->read_file;
}
}
# for OPTIONS request, set response headers
elsif ($self->{http_request}{method} eq "OPTIONS") {
$self->{http_response}{headers}{'Content-Length'} = 0;
$self->set_response_status(200);
}
# no status set - should not occur
if (!$self->{http_response}{status}) {
$self->set_response_status(500, "Do not know how to handle your request.");
}
# send HTTP response
$self->send_http_response;
}
}
if ($@ !~ /TIMEOUT/) {
&INetSim::Log::SubLog("[$rhost:$rport] disconnect", $self->{servicename}, $$);
}
}
sub read_http_request {
my $self = shift;
my $server = $self->{server};
my $client = $server->{client};
my $rhost = $server->{peeraddr};
my $rport = $server->{peerport};
my $timeout = &INetSim::Config::getConfigParameter("Default_TimeOut");
my @request = ();
eval {
local $SIG{'ALRM'} = sub { die "TIMEOUT" };
alarm($timeout);
# read full request from client
while (<$client>) {
alarm($timeout);
s/[\r\n]+$//g;
if ($_ ne "") {
# check for non-printable characters
if (! /^[\x20-\x7e]+$/) {
s/[^\x20-\x7e]/\./g;
&INetSim::Log::SubLog("[$rhost:$rport] recv: $_", $self->{servicename}, $$);
$self->set_response_status(400, "Your request contains illegal non-printable characters.");
return 1;
}
else {
push (@request, $_);
&INetSim::Log::SubLog("[$rhost:$rport] recv: $_", $self->{servicename}, $$);
}
}
last if ($_ eq "");
}
alarm(0);
};
if ($@ =~ /TIMEOUT/) {
&INetSim::Log::SubLog("[$rhost:$rport] disconnect (timeout)", $self->{servicename}, $$);
return 0;
}
if (scalar @request == 0) {
# no data received
&INetSim::Log::SubLog("[$rhost:$rport] info: Client sent no data", $self->{servicename}, $$);
return 0;
}
# get first line of request
my $first_line = shift @request;
# must be of format METHOD REQUEST-URI HTTP-VERSION
my @args = split(/ /, $first_line);
if ((scalar @args) != 3) {
$self->set_response_status(400); # Bad Request
return 1;
}
# implemented methods
if (($args[0] eq "GET") ||
($args[0] eq "HEAD") ||
($args[0] eq "POST") ||
($args[0] eq "OPTIONS")) {
$self->{http_request}{method} = $args[0];
}
else {
$self->set_response_status(501, "Method '$args[0]' not implemented.");
$self->{http_response}{headers}{'Allow'} = "GET, HEAD, POST, OPTIONS";
return 1;
}
# supported versions
if (($args[2] eq "HTTP/1.0") || ($args[2] eq "HTTP/1.1")) {
$self->{http_request}{version} = $args[2];
}
else {
$self->set_response_status(505, "Version '$args[2]' not supported.");
return 1;
}
# check if Request-URI is absoluteURI or abs_path (RFC 2616)
# (starts with "/" or "http[s]://")
if ($args[1] !~ /^(\/|\*|https?:\/\/)/) {
$self->set_response_status(400); # Bad Request
return 1;
}
# store original Request-URI
$self->{http_request}{request_uri_orig} = $args[1];
# decode hex chars in Request-URI
my $request_uri_decoded = $args[1];
my $chars_decoded = 0;
my $prefix = "";
my $hexchars = "";
my $suffix = "";
my $dec = 0;
while ($request_uri_decoded =~ /^(.*)\%(..)(.*)$/) {
$prefix = $1;
$hexchars = $2;
$suffix = $3;
$chars_decoded++;
# check for malformed hex characters
if ($hexchars !~ /^[0-9a-fA-F][0-9a-fA-F]$/) {
$self->set_response_status(400, "Your request contains malformed hex characters.");
return 1;
}
else {
$dec = hex($hexchars);
# check for non-printable characters
if (($dec < 32) || ($dec > 127)) {
$self->set_response_status(400, "Your request contains illegal characters in hex notation.");
return 1;
}
$request_uri_decoded = $prefix . chr($dec) . $suffix;
}
}
# check if decoded Request-URI still contains an '%'
if ($request_uri_decoded =~ /\%/) {
$self->set_response_status(400, "Your request contains malformed hex notation.");
return 1;
}
# store Request-URI
if ($chars_decoded > 0) {
$self->{http_request}{request_uri_decoded} = $request_uri_decoded;
$self->{http_request}{request_uri} = $request_uri_decoded;
}
else {
$self->{http_request}{request_uri} = $self->{http_request}{request_uri_orig};
}
# check Request-URI for illegal characters
# NEEDS WORK!
# if ($self->{http_request}{request_uri} =~ /[\@\:]/) {
# $self->set_response_status(400, "Your request contains illegal characters.");
# return 1;
# }
# get additional HTTP headers
my $key;
my $value;
foreach (@request) {
/^([^: ]+)(: )(.*)$/;
if (! defined $2) {
$self->set_response_status(400, "Invalid header.");
return 1;
}
$key = $1;
$value = $3;
if (defined $key && defined $value) {
if ($value =~ /^[\s]+$/) {
$self->set_response_status(400, "Invalid header.");
return 1;
}
else {
$self->{http_request}{headers}{$key} = $value;
}
}
else {
$self->set_response_status(400);
return 1;
}
}
# HTTP/1.1 needs "Host" header
if ($self->{http_request}{version} eq "HTTP/1.1") {
if (! defined $self->{http_request}{headers}{'Host'}) {
# no 'Host' header
$self->set_response_status(400);
return 1;
}
if (!(($self->{http_request}{headers}{'Host'} =~ $RE_validIPPort) || ($self->{http_request}{headers}{'Host'} =~ $RE_validHostnamePort) || ($self->{http_request}{headers}{'Host'} =~ $RE_validFQDNHostnamePort))) {
# no valid IP or (fqdn) hostname
$self->set_response_status(400);
return 1;
}
}
# ignore everything after first '?'
my @parts = split(/\?/, $self->{http_request}{request_uri});
my $req = $parts[0];
if ($req =~ /^https?:\/\//) {
# absoluteURI
$req =~ /^(https?:\/\/)([^\/]*)(|\/.*)$/;
my $host = "";
my $pathfile = "";
if (defined $2) {
$host = $2;
}
if (defined $3) {
$pathfile = $3;
}
if ($host eq "") {
# invalid absoluteURI
$self->set_response_status(400);
return 1;
}
else {
if (!(($host =~ $RE_validIPPort) || ($host =~ $RE_validHostnamePort) || ($host =~ $RE_validFQDNHostnamePort))) {
# no valid IP or (fqdn) hostname
$self->set_response_status(400);
return 1;
}
if ($pathfile ne "") {
$self->{http_request}{pathfile} = $pathfile;
}
else {
$self->{http_request}{pathfile} = "/";
}
}
}
else {
# abs_path
$self->{http_request}{pathfile} = $req;
}
# remove trailing slashes
# $self->{http_request}{pathfile} =~ s/[\/]+$//g;
# check for directory traversal "/.."
if ($self->{http_request}{pathfile} =~ /\/\.\./) {
$self->set_response_status(403, "Specification of parent directories not allowed.");
return 1;
}
if ($self->{http_request}{method} eq "POST") {
# read and store POST data
# check Content-Length header
if (defined $self->{http_request}{headers}{'Content-Length'}) {
my $contentLength = $self->{http_request}{headers}{'Content-Length'};
if ($contentLength !~ /^[0-9]+$/) {
$self->set_response_status(400, "Invalid Content-Length header value.");
return 1;
}
if ($contentLength > 1000000) {
$self->set_response_status(400, "Content-Length header value larger than 1000000.");
return 1;
}
if ($contentLength > 0) {
# initialize random number generator
srand(time() ^($$ + ($$ <<15)));
my $sha = Digest::SHA->new();
$sha->add(int(rand(100000000)));
$sha->add(time());
my $postFileName = $self->{postdata_dirname} . "/" . $sha->hexdigest;
$self->{postdata_pathfile} = $postFileName;
if (! open (POSTFILE, "> $postFileName")) {
&INetSim::Log::MainLog("Error: Unable to create HTTP POST data file '$postFileName'", $self->{servicename});
}
else {
binmode (POSTFILE);
chmod 0660, $postFileName;
eval {
local $SIG{'ALRM'} = sub { die "TIMEOUT" };
alarm($timeout);
my $buffer;
my $bytesRead = read $client, $buffer, $contentLength;
# print STDOUT "Content-Length: $contentLength\n";
# print STDOUT "Bytes read: $bytesRead\n";
print POSTFILE $buffer;
&INetSim::Log::SubLog("[$rhost:$rport] recv: <(POSTDATA)>", $self->{servicename}, $$);
if ($contentLength != $bytesRead) {
&INetSim::Log::SubLog("[$rhost:$rport] info: Content-Length header value is $contentLength, but client sent only $bytesRead bytes", $self->{servicename}, $$);
}
alarm(0);
};
close POSTFILE;
&INetSim::Log::SubLog("[$rhost:$rport] info: POST data stored to: $postFileName", $self->{servicename}, $$);
if ($@ =~ /TIMEOUT/) {
&INetSim::Log::SubLog("[$rhost:$rport] disconnect (timeout)", $self->{servicename}, $$);
return 0;
}
}
}
else {
# Content-Length is 0
&INetSim::Log::SubLog("[$rhost:$rport] info: 'Content-Length' header value is 0 - not storing POST data", $self->{servicename}, $$);
}
}
else {
# no Content-Length header
&INetSim::Log::SubLog("[$rhost:$rport] info: Client did not send 'Content-Length' header - not storing POST data", $self->{servicename}, $$);
}
}
elsif ($self->{http_request}{method} eq "OPTIONS") {
$self->{http_response}{headers}{'Allow'} = "GET, HEAD, POST, OPTIONS";
}
return 1;
}
sub send_http_response {
my $self = shift;
my $server = $self->{server};
my $client = $server->{client};
my $rhost = $server->{peeraddr};
my $rport = $server->{peerport};
$self->{http_response}{headers}{'Date'} = &get_gmdate();
# if error occured, generate body
if ($self->{http_response}{status} >= 400) {
$self->{http_response}{headers}{'Content-Type'} = "text/html";
$self->{http_response}{body} .= "<html>\n";
$self->{http_response}{body} .= " <head>\n";
$self->{http_response}{body} .= " <title>$self->{http_response}{status} $self->{error_text}{$self->{http_response}{status}}</title>\n";
$self->{http_response}{body} .= " </head>\n";
$self->{http_response}{body} .= " <body>\n";
$self->{http_response}{body} .= " <h1>$self->{error_text}{$self->{http_response}{status}}</h1>\n";
$self->{http_response}{body} .= " <p>Your browser sent a request that this server could not understand.</p>\n";
if ($self->{http_response}{errormessage}) {
$self->{http_response}{body} .= " <p>$self->{http_response}{errormessage}</p>\n";
}
$self->{http_response}{body} .= " <hr />\n";
$self->{http_response}{body} .= " <address>" . $self->{http_version} . "</address>\n";
$self->{http_response}{body} .= " </body>\n";
$self->{http_response}{body} .= "</html>\n";
}
# place headers into response
my $buffer = "HTTP/1.1 $self->{http_response}{status} $self->{error_text}{$self->{http_response}{status}}\r\n";
&INetSim::Log::SubLog("[$rhost:$rport] send: HTTP/1.1 $self->{http_response}{status} $self->{error_text}{$self->{http_response}{status}}", $self->{servicename}, $$);
foreach my $header (keys %{$self->{http_response}{headers}}) {
$buffer .= "$header: $self->{http_response}{headers}{$header}\r\n";
&INetSim::Log::SubLog("[$rhost:$rport] send: $header: $self->{http_response}{headers}{$header}", $self->{servicename}, $$);
}
$buffer .= "\r\n";
# send header to client
print $client $buffer;
# send body to client
if (($self->{http_request}{method} eq "GET") || ($self->{http_request}{method} eq "POST")) {
print $client $self->{http_response}{body};
if ($self->{http_response}{filename} ne "") {
&INetSim::Log::SubLog("[$rhost:$rport] info: Sending file: $self->{http_response}{filename}", $self->{servicename}, $$);
}
}
my $url;
if (($self->{http_request}{request_uri_orig} !~ /^https?:\/\//) && (defined $self->{http_request}{headers}{'Host'})) {
if ($self->{ssl_enabled}) {
$url = "https://" . $self->{http_request}{headers}{'Host'} . $self->{http_request}{request_uri_orig};
}
else {
$url = "http://" . $self->{http_request}{headers}{'Host'} . $self->{http_request}{request_uri_orig};
}
}
else {
$url = $self->{http_request}{request_uri_orig};
}
if ($self->{http_response}{status} < 400) {
&INetSim::Log::SubLog("[$rhost:$rport] stat: 1 method=$self->{http_request}{method} url=$url sent=$self->{http_response}{filename} postdata=$self->{postdata_pathfile}", $self->{servicename}, $$);
} else {
&INetSim::Log::SubLog("[$rhost:$rport] stat: 0 method=$self->{http_request}{method} url=$url sent=$self->{http_response}{filename} postdata=$self->{postdata_pathfile}", $self->{servicename}, $$);
}
}
sub set_response_status {
my $self = shift;
my $statuscode = shift;
my $errormessage = shift;
$self->{http_response}{status} = $statuscode;
$self->{http_response}{errormessage} = $errormessage;
}
sub read_file {
my $self = shift;
my $filename = $self->{document_root} . $self->{http_request}{pathfile};
if (! -e $filename) { # check if filepath exists
$self->set_response_status(404, "No such file or directory.");
return;
}
elsif (! -r $filename) { # check if filepath is readable
$self->set_response_status(403, "Permission denied.");
return;
}
else {
if (-d $filename) { # filepath is a directory
# check if it contains a default document
my @default_documents = split (/\s+/, $self->{default_documents});
my $newfilename = "";
foreach (@default_documents) {
my $checkfilename = $filename . "/" . $_;
if (-e $checkfilename) {
$newfilename = $checkfilename;
last;
}
}
if ($newfilename eq "") {
# no default document found
$self->set_response_status(403, "Directory listing not allowed.");
return;
}
else {
# default document found
$filename = $newfilename;
if (! -r $filename) {
$self->set_response_status(403, "Permission denied.");
return;
}
}
}
$self->{http_response}{filename} = $filename;
# read the file into HTTP response body
# determine file size
my $filesize = (-s $filename);
$self->{http_response}{headers}{'Content-Length'} = $filesize;
# read file
open (FILE, "<$filename") or $self->error_exit("Unable to open file '$filename': $!");
binmode (FILE);
read (FILE, $self->{http_response}{body}, $filesize);
close (FILE);
# determine Content-Type
my @parts = split (/\./, $filename);
my $extension = lc(pop @parts);
if(defined $self->{mimetypes}{$extension}) {
$self->{http_response}{headers}{'Content-Type'} = $self->{mimetypes}{$extension};
}
else {
$self->{http_response}{headers}{'Content-Type'} = "application/octet-stream";
}
# set status 200 OK
$self->set_response_status(200);
}
}
sub read_fakefile {
my $self = shift;
my $server = $self->{server};
my $client = $server->{client};
my $rhost = $server->{peeraddr};
my $rport = $server->{peerport};
my $fakefilename;
# check for static fakefile
if (defined $self->{static_fakefile_pathtoname}{$self->{http_request}{pathfile}}) {
# configured static fakefile found
$fakefilename = $self->{fakeFileDir} . "/" . $self->{static_fakefile_pathtoname}{$self->{http_request}{pathfile}};
# set content-type
$self->{http_response}{headers}{'Content-Type'} = $self->{static_fakefile_pathtomimetype}{$self->{http_request}{pathfile}};
&INetSim::Log::SubLog("[$rhost:$rport] info: Sending static fake file configured for path '$self->{http_request}{pathfile}'.", $self->{servicename}, $$);
}
else {
# get extension from requested file
my $extension = undef;
my @parts = split (/\./, $self->{http_request}{pathfile});
if ((scalar @parts) > 1) {
$extension = lc(pop @parts);
}
# select fake file
if((defined $extension) && (defined $self->{fakefile_exttoname}{$extension})) {
# extension configured
$fakefilename = $self->{fakeFileDir} . "/" . $self->{fakefile_exttoname}{$extension};
# set content-type
$self->{http_response}{headers}{'Content-Type'} = $self->{fakefile_exttomimetype}{$extension};
&INetSim::Log::SubLog("[$rhost:$rport] info: Sending fake file configured for extension '$extension'.", $self->{servicename}, $$);
}
else {
# extension not configured, check for default fakefile
if((defined $self->{default_fakefilename}) && (defined $self->{default_fakefilemimetype})) {
$fakefilename = $self->{fakeFileDir} . "/" . $self->{default_fakefilename};
$self->{http_response}{headers}{'Content-Type'} = $self->{default_fakefilemimetype};
&INetSim::Log::SubLog("[$rhost:$rport] info: No matching file extension configured. Sending default fake file.", $self->{servicename}, $$);
}
else {
# no default fakefile configured - return 404 Not Found
$self->set_response_status(404, "No such file or directory.");
&INetSim::Log::SubLog("[$rhost:$rport] warn: No matching file extension or default fake file configured.", $self->{servicename}, $$);
return;
}
}
}
if (! -f $fakefilename) { # check if fakefile exists
$self->set_response_status(404, "No such file or directory.");
&INetSim::Log::SubLog("[$rhost:$rport] warn: Fake file $fakefilename does not exist", $self->{servicename}, $$);
return;
}
elsif (! -r $fakefilename) { # check if fakefile is readable
$self->set_response_status(403, "Permission denied.");
&INetSim::Log::SubLog("[$rhost:$rport] warn: No permission to read fake file $fakefilename", $self->{servicename}, $$);
return;
}
$self->{http_response}{filename} = $fakefilename;
# determine file size
my $filesize = (-s $fakefilename);
$self->{http_response}{headers}{'Content-Length'} = $filesize;
# read file
open (FILE, "<$fakefilename") or $self->error_exit("Unable to open fake file '$fakefilename': $!");
binmode (FILE);
read (FILE, $self->{http_response}{body}, $filesize);
close (FILE);
$self->set_response_status(200);
}
sub fake_dyndns {
my $self = shift;
my $server = $self->{server};
my $client = $server->{client};
my $rhost = $server->{peeraddr};
my $rport = $server->{peerport};
# set server string to dyndns-checkip
$self->{http_response}{headers}{'Server'} = "DynDNS-CheckIP/1.0";
# set content-type
$self->{http_response}{headers}{'Content-Type'} = "text/html";
# set additional header
$self->{http_response}{headers}{'Cache-Control'} = "no-cache";
$self->{http_response}{headers}{'Pragma'} = "no-cache";
# build content body
$self->{http_response}{body} = "<html><head><title>Current IP Check</title></head><body>Current IP Address: ".$rhost."</body></html>\r\n";
# determine content length
$self->{http_response}{headers}{'Content-Length'} = length($self->{http_response}{body});
# set filename to 'none' for logging
$self->{http_response}{filename} = "none";
$self->set_response_status(200);
}
sub send_wpadfile {
my $self = shift;
my $server = $self->{server};
my $client = $server->{client};
my $rhost = $server->{peeraddr};
my $rport = $server->{peerport};
my $localaddress = &INetSim::Config::getConfigParameter("Default_BindAddress");
# set content-type
$self->{http_response}{headers}{'Content-Type'} = "application/x-ns-proxy-autoconfig";
# build content body
$self->{http_response}{body} = "function FindProxyForURL(url, host)\n";
$self->{http_response}{body} .= "{\n";
$self->{http_response}{body} .= " if (isInNet(host, \"192.168.1.0\", \"255.255.255.0\"))\n"; # this is an example only, should be removed later !!!
$self->{http_response}{body} .= " return \"DIRECT\";\n";
$self->{http_response}{body} .= " else\n";
$self->{http_response}{body} .= " return \"PROXY $localaddress:8080\";\n";
$self->{http_response}{body} .= "}\n";
# determine content length
$self->{http_response}{headers}{'Content-Length'} = length($self->{http_response}{body});
# set filename to 'none' for logging
$self->{http_response}{filename} = "none";
$self->set_response_status(200);
}
sub get_gmdate {
# return current GMT date
my @months = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
my @weekDays = qw(Sun Mon Tue Wed Thu Fri Sat);
my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = gmtime(&INetSim::FakeTime::get_faketime());
$year += 1900;
my $gmdate = sprintf("%3s, %02d %3s %4d %02d:%02d:%02d GMT", $weekDays[$wday], $mday, $months[$mon], $year, $hour, $min, $sec);
return $gmdate;
}
sub upgrade_to_ssl {
my $self = shift;
my %ssl_params = ( SSL_version => "SSLv23",
SSL_cipher_list => "ALL",
SSL_server => 1,
SSL_use_cert => 1,
SSL_key_file => $self->{ssl_key},
SSL_cert_file => $self->{ssl_crt} );
$self->{last_ssl_error} = "";
if (defined $self->{ssl_dh} && $self->{ssl_dh}) {
$ssl_params{'SSL_dh_file'} = $self->{ssl_dh};
}
my $result = IO::Socket::SSL::socket_to_SSL( $self->{server}->{client}, %ssl_params );
if (defined $result) {
# $status{tls_cipher} = lc($result->get_cipher());
return 1;
}
else {
$self->{last_ssl_error} = IO::Socket::SSL::errstr();
return 0;
}
}
sub error_exit {
my $self = shift;
my $msg = shift;
my $server = $self->{server};
my $client = $server->{client};
my $rhost = $server->{peeraddr};
my $rport = $server->{peerport};
if (! defined $msg) {
$msg = "Unknown error";
}
&INetSim::Log::MainLog("$msg. Closing connection.", $self->{servicename});
&INetSim::Log::SubLog("[$rhost:$rport] error: $msg. Closing connection.", $self->{servicename}, $$);
&INetSim::Log::SubLog("[$rhost:$rport] disconnect", $self->{servicename}, $$);
exit 1;
}
1;
#############################################################
#
# History:
#
# Version 0.77 (2014-05-23) th
# - changed SSL_version to "SSLv23"
#
# Version 0.76 (2010-11-03) th
# - add HTTP Version to status code response
#
# Version 0.75 (2010-09-18) th
# - bugfix: HTTPS fakefile mode used configuration for HTTP service
# - bugfix: take care of HTTPs absolute URIs
# - added support for HTTP(S) static fakefiles
#
# Version 0.74 (2009-12-19) me
# - added new configuration variable 'CertDir'
#
# Version 0.73 (2009-10-27) me
# - added support for SSL (https)
# - removed some unnecessary variables
# - added .com as top level domain for dyndns
#
# Version 0.72 (2008-09-05) th
# - added support for OPTIONS method
#
# Version 0.71 (2008-08-27) me
# - added logging of process id
#
# Version 0.70 (2008-08-25) th
# - changed regexp for 'wpad' request matching
#
# Version 0.69 (2008-08-20) me
# - added function 'send_wpadfile()' to FakeMode
#
# Version 0.68 (2008-08-09) th
# - check data directories on startup
#
# Version 0.67 (2008-08-08) th
# - support port numbers in 'Host' header and absoluteURI
#
# Version 0.66 (2008-08-03) th
# - improved HTTP POST support
#
# Version 0.65 (2008-08-02) th
# - added basic support for HTTP POST
#
# Version 0.64 (2008-06-26) th
# - changed status logging for bad requests
#
# Version 0.63 (2008-06-15) th
# - code cleanup
#
# Version 0.62 (2008-06-14) th
# - bugfix in header value parsing
#
# Version 0.61 (2008-06-14) th
# - bugfix in regexp for check of empty header values
#
# Version 0.6 (2008-06-13) th
# - improved handling of Request-URI
# - support absoluteURI (RFC 2616)
#
# Version 0.52 (2008-04-01) th
# - added timeout after client inactivity of n seconds,
# using new config parameter Default_TimeOut
#
# Version 0.51 (2008-02-27) th
# - temporarily disable a check for invalid chars in request
# because it causes problems
#
# Version 0.50 (2007-12-31) th
# - change process name
#
# Version 0.49 (2007-10-24) me
# - fixed uninitialized value if host header isn't given
#
# Version 0.48 (2007-10-14) th
# - added "info:" to logging of "Requested URL" and "Sending file"
#
# Version 0.47 (2007-09-22) me
# - added fake_dyndns() to FakeMode
#
# Version 0.46 (2007-06-05) th
# - decode hex chars in request earlier
# - if request contains hex encoded chars, log decoded request
# - fixed bug in check for malformed hex notation
# - check for non-printable hex-decoded chars
#
# Version 0.45 (2007-06-04) th
# - fixed bug in processing GET queries
#
# Version 0.44 (2007-05-31) th
# - added some comments
#
# Version 0.43 (2007-05-24) th
# - MIME types for fake files are not determined via mime.types anymore
# but must be specified in configuration file
#
# Version 0.42 (2007-05-07) th
# - check for non-printable characters in request
# - check for illegal hex characters while decoding hex
#
# Version 0.41 (2007-04-27) th
# - fixed uninitialized value when logging 'stat' for a bad request
# - use getConfigParameter, getConfigHash
#
# Version 0.40 (2007-04-25) me
# - changed failed! message and exit() if mimetype file is not
# available to warning message only - no exit
#
# Version 0.39 (2007-04-22) th
# - added error_exit()
# - replaced die()-calls with error_exit()
# - changed status logging
#
# Version 0.38 (2007-04-21) me
# - added logging of status for use with &INetSim::Report::GenReport()
#
# Version 0.37 (2007-04-21) th
# - fixed if-condition so error messages are returned to client again
# - changed handling of default fake file
#
# Version 0.36 (2007-04-20) th
# - check if fake file exists and is readable
#
# Version 0.35 (2007-04-11) th
# - check if no data was received from client
# - added logging of 'connect' and 'disconnect' messages
#
# Version 0.34 (2007-04-10) th
# - get fake time via &INetSim::FakeTime::get_faketime()
# instead of accessing $INetSim::Config::FakeTimeDelta
#
# Version 0.33 (2007-04-06) th
# - added logging of files sent
#
# Version 0.32 (2007-04-05) th
# - changed check for MaxChilds, BindAddress, RunAsUser and
# RunAsGroup
#
# Version 0.31 (2007-03-29) th
# - added function get_gmdate()
# - added FakeMode
#
# Version 0.3 (2007-03-28) th
# - completely rewritten again because the example from
# Net::Server was crap
#
# Version 0.2 (2007-03-24) th
# - completely rewritten using example from Net::Server
#
# Version 0.1 (2007-03-19) th
#
#############################################################
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