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|
#!/usr/bin/perl -wT
#
# Receive HTTP post request with a file upload and process it as a
# sitesummary submission.
#
# Handle three different submission methods
# - mime-encoded upload with sitesummary report in compressed form
use strict;
use CGI;
use POSIX qw(strftime);
use Socket;
use Sys::Syslog;
my $basedir = "/var/lib/sitesummary";
my $handlerdir = "/usr/lib/sitesummary/handler.d";
$ENV{PATH} = "/bin:/usr/bin";
print "Content-Type: text/plain\n\n";
my ($peeripaddr, $peername) = get_peerinfo(\*STDIN);
if (exists $ENV{REQUEST_METHOD} && $ENV{REQUEST_METHOD} ne "POST")
{
print "Sitesummary HTTP-POST submission URL\n";
print "Visit http://debian-edu.alioth.debian.org/ for more info.\n";
exit 0;
}
# Extract post data, handle both simple and multipart way
my @entry;
my $filename = "unknown";
if (exists $ENV{CONTENT_TYPE} && $ENV{CONTENT_TYPE} =~ m%multipart/form-data%){
my $query = new CGI;
my $fh = $query->upload("sitesummary");
if ($fh) {
$filename = $query->param("sitesummary");
my $type = $query->uploadInfo($filename)->{'Content-Type'};
if ("application/octet-stream" ne $type) {
print "Only 'application/octet-stream' is supported (not $type)!";
die;
} else {
my $encoding = $query->uploadInfo($filename)->{'Content-Encoding'};
if ("x-gzip" eq $encoding || "gzip" eq $encoding) {
# Uncompress
print "Compressed ($encoding) encoding detected.\n";
my $data;
# $data = join("", <$fh>);
my $len = (stat($fh))[7];
read $fh, $data, $len;
$data = Compress::Zlib::memGunzip($data);
@entry = ($data);
} else { # Pass throught
#print STDERR "Identity encoding detected.\n";
@entry = <$fh>;
}
}
} else {
print $query->cgi_error;
die;
}
} else {
print <<EOF;
Unsupported submission method.
EOF
}
my $timestamp = strftime("%Y-%m-%dT%H:%M:%S", gmtime());
if ($filename =~ m/.tar.gz$/) {
$filename = "sitesummary.tar.gz";
} elsif ($filename =~ m/.tar.gz.gpg$/) {
$filename = "sitesummary.tar.gz.gpg";
} else {
die "Unhandled file type '$filename'"
}
# XXX Come up with some unique file name.
my $savefile = "$basedir/tmpstorage/$peeripaddr-$timestamp-$$-$filename";
open(SITESUMMARY, ">", $savefile) or die "Unable to write to $savefile";
print SITESUMMARY @entry;
close SITESUMMARY;
print "Thanks for your submission to site-summary!\n";
print "SITESUMMARY HTTP-POST OK\n";
process_entry($peeripaddr, $peername, $savefile);
unlink $savefile;
exit 0;
sub extract_unique_id {
my $eth0mac;
my $eth1mac;
my $eth2mac;
open(IFCONFIG, "system/ifconfig-a") || die "Unable to read ifconfig-a";
while (<IFCONFIG>) {
chomp;
$eth0mac = $1 if (m/^eth0\s+Link encap:Ethernet HWaddr (\S+)/);
$eth1mac = $1 if (m/^eth1\s+Link encap:Ethernet HWaddr (\S+)/);
$eth2mac = $1 if (m/^eth2\s+Link encap:Ethernet HWaddr (\S+)/);
}
close (IFCONFIG);
#print STDERR "MAC: $eth0mac\n";
my $mac = $eth0mac || $eth1mac || $eth2mac || "unknown";
return lc("ether-$mac");
}
sub process_entry {
my ($peeripaddr, $peername, $filename) = @_;
my $dirname;
if ($filename =~ m/(.+).tar.gz$/) {
$dirname = $1;
mkdir $dirname;
chdir $dirname;
`tar zxf $filename`;
} else {
die "Unhandled file format '$filename'";
}
open(PEERINFO, ">peerinfo") || die;
print PEERINFO "$peeripaddr $peername\n";
close(PEERINFO) || die;
my $id = extract_unique_id($dirname);
if ("ether-unknown" eq $id) {
syslog('warning', "%s", "ignoring client without MAC address connected from \[$peeripaddr\]");
chdir "..";
`rm -r $dirname`;
return;
}
my $newdir = "$basedir/entries/$id";
my $status = "new";
if ( -d $newdir ) {
`rm -r $newdir`;
$status = "update";
}
rename $dirname, $newdir || die;
$ENV{"PATH"} = "";
for my $handler (<$handlerdir/*>) {
# Untaint script path
$handler =~ m/^([^;]*)$/; $handler = $1;
system("$handler", "$newdir", "$status");
}
}
sub get_peerinfo {
my $sockethandle = shift;
my ($peeripstr, $peername) = ("", "");
if ($ENV{'REMOTE_ADDR'}) { # CGI variable
$peeripstr = $ENV{'REMOTE_ADDR'};
$peeripstr =~ m/(\d+).(\d+).(\d+).(\d+)/; # Untaint
$peeripstr = "$1.$2.$3.$4";
$peeripaddr = inet_aton($peeripstr);
$peername = gethostbyaddr($peeripaddr, AF_INET);
} elsif (my $sockaddr = getpeername($sockethandle)) {
my $peerport;
($peerport, $peeripaddr) = sockaddr_in($sockaddr);
$peername = gethostbyaddr($peeripaddr, AF_INET);
$peeripstr = inet_ntoa($peeripaddr);
} else {
# Running on the command line, use test host
$peeripstr = "127.0.0.1";
$peername = "localhost";
}
if ("" eq $peername) {
syslog('warning', "%s", "client without DNS entry connected from \[$peeripstr\]");
$peername = "$peeripstr";
}
return ($peeripstr, $peername);
}
|
