--- /dev/null
+#!/usr/bin/perl
+
+use strict;
+
+#use Convert::Bencode_XS qw(:all);
+use Convert::Bencode qw(:all);
+use Data::Dumper;
+use LWP::UserAgent;
+use URI::Escape;
+
+# enable verbose output
+my $debug = 0;
+
+# tracker from where we get our sync data
+my @trackers = ('127.0.0.1:8989');
+# tracker to upload merged data
+my @client_tracker = ('127.0.0.1:8989');
+
+# time to wait between syncs
+my $sleeptime = '300';
+
+# SSL cert and key
+my $ssl_cert = 'cert.pem';
+my $ssl_key = 'key.pem';
+
+foreach(@trackers) {
+ print "Syncing from: $_\n";
+}
+foreach(@client_tracker) {
+ print "Syncing to: $_\n";
+}
+
+my $file = shift;
+
+
+# global hash for storing the merged syncs
+my %merged_syncs;
+
+while(1) {
+ %merged_syncs;
+ my @bencoded_sync_data;
+
+ # fetch the sync from every tracker and put it into an array in bencoded form
+ foreach my $tracker (@trackers) {
+ my $bencoded_sync = fetch_sync($tracker);
+# my $bencoded_sync = fetch_sync_from_file($file);
+ if($bencoded_sync ne 0 && $bencoded_sync =~ /^d4\:sync/) {
+ push(@bencoded_sync_data,$bencoded_sync);
+ }
+ }
+
+ # bdecode every sync and throw it into the merged-sync
+ foreach my $bencoded_sync (@bencoded_sync_data) {
+ print "Doing merge...\n";
+ merge_sync(bdecode($bencoded_sync));
+ my $num_torrents = keys(%merged_syncs);
+
+ print "number of torrents: $num_torrents\n";
+ }
+
+ # number of max. peers in one changeset
+ my $peer_limit = 500;
+ # max number of changesets per commit
+ my $max_changesets = 10;
+ my $hash_count = 0;
+ my $peer_count = 0;
+ my $changeset;
+ my @escaped_changesets;
+
+ # run until all hashes are put into changesets and commited to the trackers
+ while(keys(%merged_syncs) != 0) {
+
+ foreach my $hash (keys(%merged_syncs)) {
+ print "Starting new changeset\n" if($peer_count == 0 && $debug);
+ my $num_peers = keys(%{$merged_syncs{$hash}});
+
+ print "\t$peer_count peers for $hash_count hashes in changeset\n" if($debug);
+
+ my $pack_hash = pack('H*',$hash);
+
+ # as long as the peer_limit is not reached, add new hashes with peers to the changeset hash-table
+ if($peer_count < $peer_limit) {
+ print "\t\tAdd $num_peers peers for $hash changeset\n" if($debug);
+ $peer_count = $peer_count + $num_peers;
+ foreach my $peer_socket (keys(%{$merged_syncs{$hash}})) {
+
+ my $flags = $merged_syncs{$hash}{$peer_socket};
+
+ print "\t\t\tAdd $peer_socket $flags\n" if($debug);
+
+ my $pack_peer = packme($peer_socket,$flags);
+
+ $changeset->{'sync'}->{$pack_hash} = $changeset->{'sync'}->{$pack_hash}.$pack_peer;
+ }
+ $hash_count++;
+ # hash is stored in the changeset, delete it from the hash-table
+ delete $merged_syncs{$hash};
+ }
+
+ # the peer_limit is reached or we are out of torrents, so start preparing a changeset
+ if($peer_count >= $peer_limit || keys(%merged_syncs) == 0) {
+
+ print "Commit changeset for $hash_count hashes with $peer_count peers total\n" if($debug);
+
+ # bencode the changeset
+ my $enc_changeset = bencode($changeset);
+
+ # URL-escape the changeset and put into an array of changesets
+ my $foobar = uri_escape($enc_changeset);
+ push(@escaped_changesets,$foobar);
+
+ # the changeset is ready and stored, so delete it from the changeset hash-table
+ delete $changeset->{'sync'};
+
+ $hash_count = 0;
+ $peer_count = 0;
+ print "\n\n\n" if($debug);
+ }
+
+ # if enought changesets are prepared or we are out of torrents for more changesets,
+ # sync the changesets to the trackers
+ if($#escaped_changesets == $max_changesets || keys(%merged_syncs) == 0) {
+ print "\tSync...\n";
+ sync_to_tracker(\@escaped_changesets);
+ undef @escaped_changesets;
+ }
+
+ }
+ }
+
+ print "Sleeping for $sleeptime seconds\n";
+ sleep $sleeptime;
+}
+
+sub connect_tracker {
+ # connect a tracker via HTTPS, returns the body of the response
+ my $url = shift;
+
+ $ENV{HTTPS_DEBUG} = 0;
+ $ENV{HTTPS_CERT_FILE} = $ssl_cert;
+ $ENV{HTTPS_KEY_FILE} = $ssl_key;
+
+ my $ua = new LWP::UserAgent;
+ my $req = new HTTP::Request('GET', $url);
+ my $res = $ua->request($req);
+
+ my $content = $res->content;
+
+ if($res->is_success()) {
+ return $content;
+ } else {
+ print $res->code."|".$res->status_line."\n";
+ return 0;
+ }
+}
+
+sub sync_to_tracker {
+ # commit changesets to a tracker
+ my @changesets = @{(shift)};
+
+ # prepare the URI with URL-encoded changesets concatenated by a &
+ my $uri = 'sync?';
+ foreach my $set (@changesets) {
+ $uri .= 'changeset='.$set.'&';
+ }
+ my $uri_length = length($uri);
+
+ # commit the collection of changesets to the tracker via HTTPS
+ foreach my $tracker (@client_tracker) {
+ print "\t\tTracker: $tracker (URI: $uri_length)\n";
+ my $url = "https://$tracker/".$uri;
+ connect_tracker($url);
+ }
+}
+
+sub packme {
+ # pack data
+ # returns ipaddr, port and flags in packed format
+ my $peer_socket = shift;
+ my $flags = shift;
+
+ my($a,$b,$c,$d,$port) = split(/[\.,\:]/,$peer_socket);
+ my $pack_peer = pack('C4 n1 b16',$a,$b,$c,$d,$port,$flags);
+
+ return $pack_peer;
+}
+
+sub unpackme {
+ # unpack packed data
+ # returns ipaddr. in quad-form with port (a.b.c.d:port) and flags as bitfield
+ # data is packed as:
+ # - 4 byte ipaddr. (unsigned char value)
+ # - 2 byte port (unsigned short in "network" (big-endian) order)
+ # - 2 byte flags (bit string (ascending bit order inside each byte))
+ my $data = shift;
+
+ my($a, $b, $c, $d, $port, $flags) = unpack('C4 n1 b16',$data);
+ my $peer_socket = "$a\.$b\.$c\.$d\:$port";
+
+ return($peer_socket,$flags);
+}
+
+sub fetch_sync {
+ # fetch sync from a tracker
+ my $tracker = shift;
+ my $url = "https://$tracker/sync";
+
+ print "Fetching from $url\n";
+
+ my $body = connect_tracker($url);
+
+ if($body && $body =~ /^d4\:sync/) {
+ return $body;
+ } else {
+ return 0;
+ }
+}
+
+sub fetch_sync_from_file {
+ # fetch sync from a file
+ my $file = shift;
+ my $body;
+ print "Fetching from file $file\n";
+ open(FILE,"<$file");
+ while(<FILE>) {
+ $body .= $_;
+ }
+ close(FILE);
+ return $body;
+}
+
+sub merge_sync {
+ # This builds a hash table with the torrenthash as keys. The value is a hash table again with the peer-socket as keys
+ # and flags in the value
+ # Example:
+ # 60dd2beb4197f71677c0f5ba92b956f7d04651e5 =>
+ # 192.168.23.23:2323 => 0000000000000000
+ # 23.23.23.23:2342 => 0000000100000000
+ # b220b4d7136e84a88abc090db88bec8604a808f3 =>
+ # 42.23.42.23:55555 => 0000000000000000
+
+ my $hashref = shift;
+
+ my $nonuniq_hash_counter = 0;
+ my $nonuniq_peer_counter = 0;
+ my $hash_counter = 0;
+ my $peer_counter = 0;
+
+ foreach my $key (keys(%{$hashref->{'sync'}})) {
+ # start merge for every sha1-hash in the sync
+ my $hash = unpack('H*',$key);
+
+ $hash_counter++;
+ $nonuniq_hash_counter++ if exists $merged_syncs{$hash};
+
+ while(${$hashref->{'sync'}}{$key} ne "")
+ {
+ # split the value into 8-byte and unpack it for getting peer-socket and flags
+ my($peer_socket,$flags) = unpackme(substr(${$hashref->{'sync'}}{$key},0,8,''));
+
+ $peer_counter++;
+ $nonuniq_peer_counter++ if exists $merged_syncs{$hash}{$peer_socket};
+
+ # Create a hash table with sha1-hash as key and a hash table as value.
+ # The hash table in the value has the peer-socket as key and flags as value
+ # If the entry already exists, the flags are ORed together, if not it is ORed with 0
+ $merged_syncs{$hash}{$peer_socket} = $flags | $merged_syncs{$hash}{$peer_socket};
+ }
+ }
+ print "$hash_counter hashes $nonuniq_hash_counter non-uniq, $peer_counter peers $nonuniq_peer_counter non-uniq.\n";
+
+}
+
+sub test_decode {
+ my $hashref = shift;
+
+ print "CHANGESET DEBUG OUTPUT\n";
+
+ print Dumper $hashref;
+ foreach my $key (keys(%{$hashref->{'sync'}})) {
+ my $hash = unpack('H*',$key);
+
+ print "Changeset for $hash\n";
+ while(${$hashref->{'sync'}}{$key} ne "")
+ {
+
+ my($peer_socket,$flags) = unpackme(substr(${$hashref->{'sync'}}{$key},0,8,''));
+ print "\tSocket: $peer_socket Flags: $flags\n";
+ }
+ }
+}
projects / thirdparty / opentracker.git / commitdiff
