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dapnet2ntfy.pl
Executable file
197
dapnet2ntfy.pl
Executable file
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#!/usr/bin/env perl
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# Protocol for connecting transmitters to DAPNET:
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# https://hampager.de/dokuwiki/doku.php?id=dapnetprotocol
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use strict;
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use warnings;
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# configuration
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my $version = '0.5.0';
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my $dapnet_username = '';
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my $dapnet_password = '';
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my $dapnet_server = 'dapnet.afu.rwth-aachen.de';
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#my $dapnet_server = 'db0dbn.ig-funk-siebengebirge.de';
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my $dapnet_port = '43434',
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my $ntfy_username = '';
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my $ntfy_password = '';
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my $ntfy_url = 'https://server/topic';
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my $debug = 1;
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my $dapnet_timeout_read_seconds = 125;
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my $dapnet_timeout_write_seconds = 5;
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my %rics = (
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# on pager
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'630224' => 'PM',
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'1041' => 'MOWAS',
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'1063' => 'METAR',
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'1064' => 'WX-Lokal',
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'1080' => 'APRS-WX',
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'1081' => 'DWD',
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# for info
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# all
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'1001' => 'DAPNET-News',
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'1028' => 'Clubnews',
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#'1060' => 'Stats',
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# dl-all
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'1016' => 'DL-HH',
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'1040' => 'Notfunk-DL',
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'1044' => 'HAMNET',
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'1055' => 'DAPNET-Team',
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'1058' => 'xOTA',
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# dl-hh
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'1042' => 'Notfunk-Lokal',
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'1083' => 'Feinstaub',
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);
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# start of program
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use IO::Socket::INET;
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use IO::Socket::Timeout;;
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use Errno qw(ETIMEDOUT EWOULDBLOCK);
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use HTTP::Request ();
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use LWP::UserAgent;
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use MIME::Base64;
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use POSIX qw(strftime);
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use utf8;
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my $run = 1;
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$SIG{INT} = sub {
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print STDERR "terminating\n";
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$run = 0;
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};
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sub debug_print {
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if ($debug) {
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print STDERR strftime("%F %T", localtime) . " $_[0]";
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}
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}
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sub decode_umlauts {
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# [\]{|}~ -> ÄÖÜäöüß
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my $s = $_[0];
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$s =~ tr/[\\]{|}~/ÄÖÜäöüß/;
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utf8::encode($s);
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return $s;
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}
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sub decode_skyper
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{
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# message is ROT-1 encoded
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my $s = '';
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foreach my $c (split('', $_[0])) {
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$s = $s . chr(ord($c) - 1);
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}
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$s = decode_umlauts($s);
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return $s;
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}
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# replace decimal RIC with hex value
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# better to do this now, not every time a message arrives
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%rics = map { sprintf("%X", $_) => $rics{$_} } keys %rics;
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my $ntfy_auth_header = 'Basic ' . encode_base64($ntfy_username . ':' . $ntfy_password);
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while ($run) {
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debug_print "connecting to $dapnet_server\n";
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my $socket = IO::Socket::INET->new(
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PeerAddr => $dapnet_server,
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PeerPort => $dapnet_port,
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Timeout => $dapnet_timeout_read_seconds,
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Proto => 'tcp',
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);
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if (! $socket) {
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print STDERR "connection problem, reconnect\n";
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next;
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}
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# set up timeout for reading/writing
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IO::Socket::Timeout->enable_timeouts_on($socket);
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$socket->read_timeout($dapnet_timeout_read_seconds);
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$socket->write_timeout($dapnet_timeout_write_seconds);
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my $reconnect = 0;
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#my $last_received = time;
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# login
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$socket->send("[dapnet2ntfy v$version $dapnet_username $dapnet_password]\r\n");
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while (!$reconnect) {
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$reconnect = 0;
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my $data = <$socket>;
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if (! $data && ( 0+$! == ETIMEDOUT || 0+$! == EWOULDBLOCK )) {
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print STDERR "timeout, reconnect\n";
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$reconnect = 1;
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next;
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}
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#$socket->recv($data,1024);
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chomp $data;
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debug_print "received: $data.\n" ;
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if ($data =~ /^2:(.*)$/) {
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# ident to server
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# example: 2:00AF
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$socket->send("2:$1:0000\r\n+\r\n");
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} elsif ($data =~ /^([34]):.*$/) {
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# time sync and time slot
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# example: 3:+0090
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# example: 4:048C
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$socket->send("+\r\n");
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if ($1 == '4') {
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print STDERR "listening to $dapnet_server\n";
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}
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} elsif ($data =~ /^7/) {
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# login failed
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print STDERR "login to $dapnet_server failed:\n";
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print STDERR "$data\n";
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$run = 0;
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} elsif ($data =~ /^#([0-9a-fA-F]+) (.*)$/) {
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# messages
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# example: #02 6:1:D8:3:YYYYMMDDHHMMSS231222141600
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# increase counter and send it back
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my $cnt = hex $1;
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if ($cnt >= 255) {
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# reset counter on FF
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$cnt = 0;
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} else {
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++$cnt;
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}
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$socket->send('#' . sprintf("%02X", $cnt) . " +\r\n");
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# parse message
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my ($type, $speed, $ric, $bit, $msg) = split(/:/, $2, 5);
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# ignore speed, and bit
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# split only 5 times, message can contain :
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if ($type == '6') {
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# type 6 is for messages
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if (exists($rics{$ric})) {
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# ric is in wanted list
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# send to ntfy
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my $ua = LWP::UserAgent->new;
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my $request = HTTP::Request->new(
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'POST',
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$ntfy_url,
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[ 'Authorization' => $ntfy_auth_header ],
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"DAPNET: $rics{$ric}: " . decode_umlauts($msg)
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);
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my $response = $ua->request($request);
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} elsif ($debug && ($ric =~ /^11A[08]$/)) {
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# skyper message
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debug_print "Skyper message: " . decode_skyper($msg) . "\n";
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}
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}
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} elsif ($data eq '') {
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print STDERR "connection problem, reconnect\n";
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$reconnect = 1;
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}
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#if (time - $last_received > $dapnet_timeout_read_seconds) {
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# print STDERR "timeout, reconnect\n";
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# $reconnect = 1;
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#} else {
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# $last_received = time;
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#}
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sleep(1);
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}
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#$socket->close();
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$socket->shutdown(SHUT_RDWR);
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}
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