Toistinaseman mainostaminen APRS-asemille
HamFi
Scripti joka tutkii ajastettuna OH6RUC toistimen linuxissa aprx ohjelman tekemää /tmp/aprx-rf.log tiedostoa. Jos logissa näkyy APRS-asema joka on lähempänä kuin 30km OH6RUC toistinta ja kyseistä APRS-asemaa ei ole kuultu edellisen 24h kuluessa, ja toistin on vapaana, scripti aukaisee toistimen ja mainostaa iseaään APRS-asemalle puheella. Puhe generoidaan festival puhesyntetisaattorilla.
"Tervetuloa OH6RUC toistinaseman kuuluvuusalueelle OH6KTT. Minä olen Kaustisen OH6RUC toistinasema taajuudella 434.900 MHz. Ripiitterierotukseni on -2 MHz. Toistan. Ripiitterierotus on -2 MHz. Automaattinen tiedote ripiitteriä lähestyville APRS-asemille päättyy."
Sama scripti pitää logia suoraan RF:llä kuulluista APRS-asemista.
Ideoita jatkokehitystä varten:
- 2m tropokelit on mahdollista havaita suoraan RF:llä kuulluista asemista
- Pitkän historian avulla db:stä voisi saada selville digiripiitterin kuuntelukyky eri ilmansuuntiin
#!/usr/bin/php -q
<?php
ini_set('memory_limit','50M');
/*
aprs-repeater-advertiser.php v1.11 - repeater advertiser to APRS users
Copyright (C) 2010 Kari Karvonen <oh6ktt@toimii.net>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
$debug = 0; /* 0 = no debug, 1 = little debug, 2 = more debug, 3 = annoying */
$aprxrflogfile = "/tmp/aprx-rf.log";
$stationdbfile = "/tmp/oh6ruc-aprs-db.txt";
$repeater_call = "OH6RUC"; /* need to match aprs-rf.log */
$repeater_lat = "63.53666";
$repeater_lon = "23.69180";
$floodprotect = 60*60*24; /* after this time old station will be notified again. Seconds. */
$maxdistance = 30; /* km */
$maxloglines = 1000; /* max loglines to analyze (tail) */
$denytxfile = "/tmp/ptt-on"; /* if this file exist, no advertises will be send */
$prefixwave = "/opt/thelinkbox/wav/aprs-repeater-advertiser-1.wav"; /* wave before callsigns */
$suffixwave = "/opt/thelinkbox/wav/aprs-repeater-advertiser-2.wav"; /* wave after callsigns */
$tempwavetxt = "/tmp/aprs-repeater-advertiser.txt";
$tempwave = "/tmp/aprs-repeater-advertiser.wav";
$repeatedmatch = ",OH"; /* if this is exists on path (eg APRS,OH6RUC*,OH8RDU*,WIDE) assume packet digirepeated and discard it */
$rangelimit = 2000; /* if range more than this then range is invalid. km. */
/* code begins */
$parserdb = array();
$victims = array();
$stationdb = unserialize(@file_get_contents($stationdbfile));
if (empty($stationdb)) $stationdb = array();
$aprxrflog = @file($aprxrflogfile);
if ($aprxrflog == false) die("Cannot open $aprxrflogfile\n");
function min_to_dec($deg, $min, $decsec) {
return($deg/1.0 + $min/60.0 + $decsec/10000.0);
}
function utctimenow() {
$utcoffset = intval(date("O")/100)*60;
return (time()-$utcoffset);
}
function latlongbearing($lat1, $lon1, $lat2, $lon2) {
$lat1 = deg2rad($lat1);
$lat2 = deg2rad($lat2);
$lon1 = deg2rad ($lon1);
$lon2 = deg2rad ($lon2);
$dLon = $lon2-$lon1;
$y = sin($dLon) * cos($lat2);
$x = cos($lat1) * sin($lat2) - sin($lat1)*cos($lat2)*cos($dLon);
$bearrad = atan2($y, $x);
$beardeg = (rad2deg($bearrad)+360)%360;
return ($beardeg);
}
function decimal_distance($lat1 = "", $lon1 = "", $lat2 = "", $lon2 = "") {
$radius = 6371;
$lat1 = deg2rad ($lat1);
$lat2 = deg2rad ($lat2);
$lon1 = deg2rad ($lon1);
$lon2 = deg2rad ($lon2);
$dlon = $lon2-$lon1;
$dlat = $lat2-$lat1;
$sinlat = sin($dlat/2);
$sinlon = sin($dlon/2);
$a = ($sinlat * $sinlat) + cos($lat1) * cos($lat2) * ($sinlon*$sinlon);
$c = 2 * asin(min(1,sqrt($a)));
$d = $radius * $c;
return round($d,2);
}
function callsign2finnish($callsign) {
$chartospeech = array();
$chartospeech["-"] = "viiva";
$chartospeech["a"] = "aa";
$chartospeech["b"] = "bee";
$chartospeech["c"] = "see";
$chartospeech["d"] = "dee";
$chartospeech["e"] = "ee";
$chartospeech["f"] = "äf";
$chartospeech["g"] = "gee";
$chartospeech["h"] = "hoo";
$chartospeech["i"] = "hee";
$chartospeech["j"] = "jii";
$chartospeech["k"] = "koo";
$chartospeech["l"] = "äl";
$chartospeech["m"] = "äm";
$chartospeech["n"] = "äm";
$chartospeech["o"] = "oo";
$chartospeech["p"] = "pee";
$chartospeech["q"] = "kuu";
$chartospeech["r"] = "är";
$chartospeech["s"] = "äs";
$chartospeech["t"] = "tee";
$chartospeech["u"] = "uu";
$chartospeech["v"] = "vee";
$chartospeech["w"] = "tuplavee";
$chartospeech["x"] = "äks";
$chartospeech["y"] = "yy";
$chartospeech["z"] = "tseta";
$chartospeech["å"] = "oo";
$chartospeech["ä"] = "ää";
$chartospeech["ö"] = "öö";
$chartospeech["1"] = "yks";
$chartospeech["2"] = "kaks";
$chartospeech["3"] = "kol";
$chartospeech["4"] = "nel";
$chartospeech["5"] = "viis";
$chartospeech["6"] = "kuus";
$chartospeech["7"] = "seiska";
$chartospeech["8"] = "kasi";
$chartospeech["9"] = "ysi";
$chartospeech["0"] = "nolla";
$msg = "";
for ($tmp = 0; $tmp < strlen($callsign); $tmp++) {
$character = substr($callsign, $tmp, 1);
/* don't say -9 */
if ($character == "-") {
return $msg;
}
$vocal = $chartospeech[$character];
$msg.= $vocal;
}
return ($msg);
}
$aprxrfloglen = count($aprxrflog);
if ($aprxrfloglen > $maxloglines) $loglinestart = $aprxrfloglen-$maxloglines; else $loglinestart=0;
if ($debug>1) echo "aprxrfloglen $aprxrfloglen maxloglines $maxloglines loglinestart $loglinestart\n";
for ($tmp = $loglinestart; $tmp < $aprxrfloglen; $tmp++) {
$line = $aprxrflog[$tmp];
if (preg_match('/^([0-9]{4})-([0-9]{2})-([0-9]{2}) ([0-9]{2}):([0-9]{2}):([0-9]{2}).([0-9]{3}) '.$repeater_call.' R (.+)>(.+):(.{1})(.+)/', $line, $matches)) {
$callsign = strtolower(trim($matches[8]));
if (strpos($callsign,">")) {
/* Callsign parse failed (ugly trace packets) */
if ($debug>2) echo "Ugly callsign $callsign. Discard.\n";
continue;
}
if (strstr($matches[9],$repeatedmatch)) {
/* digirepeated patcket, discard */
if ($debug>2) echo "Digirepeated packet. Discard.\n";
continue;
}
if (strpos("\!=/@", $matches[10])) {
/* ! Position without timestamp (no APRS messaging), or Ultimeter 2000 WX Station */
/* = Position without timestamp (with APRS messaging) */
/* / Position with timestamp (no APRS messaging) */
/* @ Position with timestamp (with APRS messaging) */
} else {
/* is not position format */
if ($debug>1) echo "Unknown position identification ". $matches[10].". Discard.\n";
continue;
}
if (preg_match('/([0-9]{2})([0-9]{2}).([0-9]{1,})N(.{1})([0-9]{3})([0-9]{2}).([0-9]{1,})E/', $matches[11], $plaincoords)) {
/* coordinates are plain format */
$coordtype = "plain";
$lat = min_to_dec($plaincoords[1], $plaincoords[2], $plaincoords[3]);
$long = min_to_dec(intval($plaincoords[5]), $plaincoords[6], $plaincoords[7]);
} else {
/* coordinates are packed */
$coordtype = "packed";
$y1 = ord(substr($matches[11],1,1));
$y2 = ord(substr($matches[11],2,1));
$y3 = ord(substr($matches[11],3,1));
$y4 = ord(substr($matches[11],4,1));
$x1 = ord(substr($matches[11],5,1));
$x2 = ord(substr($matches[11],6,1));
$x3 = ord(substr($matches[11],7,1));
$x4 = ord(substr($matches[11],8,1));
$lat = 90 - (($y1-33) * 91*91*91 + ($y2-33) * 91*91 + ($y3-33) * 91 + $y4-33) / 380926;
$long = -180 + (($x1-33) * 91*91*91 + ($x2-33) * 91*91 + ($x3-33) * 91 + $x4-33) / 190463;
}
$distance = decimal_distance($repeater_lat, $repeater_lon, $lat, $long);
if ($distance > $rangelimit) {
if ($debug > 1) "Calculated distance $distance km. Invalid range limit $rangelimit. Discard\n";
continue;
}
$bearing = latlongbearing($repeater_lat, $repeater_lon, $lat, $long);
$lastheard = mktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
$parserdb[$callsign] = array("lastheard" => $lastheard, "distance" => $distance, "bearing" => $bearing, "lat" => $lat, "long" => $long, "coordtype" => $coordtype);
}
}
ksort($parserdb);
foreach ($parserdb as $callsign => $attcheddata) {
$distance = $attcheddata["distance"];
$lastheard = $attcheddata["lastheard"];
$lat = $attcheddata["lat"];
$long = $attcheddata["long"];
$coordtype = $attcheddata["coordtype"];
$bearing = $attcheddata["bearing"];
$lastheardtxt = date("r", $lastheard);
$advertisedtime = $stationdb[$callsign]["advertisedtime"];
$advertisedtimetxt = date("r",$advertisedtime);
if ($debug>0) echo "Call $callsign. Lat $lat. Long $long. Coordtype $coordtype. Distance $distance. Bearing $bearing. Lastheard $lastheardtxt. Advertised $advertisedtimetxt. ";
if (array_key_exists($callsign, $stationdb)) {
if ($debug>0) echo "Found from stationdb. ";
if ($advertisedtime < (utctimenow()-$floodprotect) && $lastheard>$stationdb[$callsign]["lastheard"]) {
if ($debug>0) if ($advertisedtime < (utctimenow()-$floodprotect)) echo "Floodprotect expired. "; else echo "Floodprotect active. ";
if ($distance < $maxdistance) {
/* Exists in stationdb. Too old and inside circle */
if ($debug>0) echo "Inside $maxdistance km cicle. Add to victims.";
$victims[] = $callsign;
$advertisedtime = utctimenow();
} else {
/* Station too far */
if ($debug>0) echo "Outside $maxdistance km circle. Skip.";
}
} else {
if ($debug>0) if ($advertisedtime < (utctimenow()-$floodprotect)) echo "Floodprotect expired. "; else echo "Floodprotect active. ";
if ($debug>0) if ($lastheard>$stationdb[$callsign]["lastheard"]) echo "New packet. "; else echo "Old packed. ";
if ($debug>0) echo "Skip.";
}
} else {
if ($debug>0) echo "Not found from stationdb. ";
if ($distance < $maxdistance) {
if ($debug>0) echo "Inside ${maxdistance}km circle. Add to victims.";
$victims[] = $callsign;
$advertisedtime = utctimenow();
} else {
if ($debug>0) echo "Outside ${maxdistance}km circle. Skip.";
}
}
$stationdb[$callsign]["lastheard"] = $lastheard;
$stationdb[$callsign]["distance"] = $distance;
$stationdb[$callsign]["bearing"] = $bearing;
$stationdb[$callsign]["lat"] = $lat;
$stationdb[$callsign]["long"] = $long;
$stationdb[$callsign]["coordtype"] = $coordtype;
$stationdb[$callsign]["advertisedtime"] = $advertisedtime;
if ($debug>0) echo "\n";
}
if ($debug>0) echo "Updating $stationdbfile\n";
file_put_contents($stationdbfile, serialize($stationdb));
$msg = "";
if (count($victims) == 0) {
/* do nothing */
} else {
if (!file_exists($denytxfile)) {
@unlink($tempwavetxt);
@unlink($tempwave);
foreach ($victims as $victim) {
$msg .= callsign2finnish($victim).", ";
}
$msg = substr($msg,0,-2);
if ($debug>0) echo "$msg\n";
if ($debug<1) file_put_contents($tempwavetxt, utf8_decode($msg));
if ($debug<1) system("/usr/bin/text2wave -F 8000 < ".$tempwavetxt." -o ".$tempwave);
if ($debug<1) system("/usr/sbin/tlbcmd \"port OH6RUC-Kaustinen; say -c ".$prefixwave."; say -c ".$tempwave."; say -c ".$suffixwave."\"");
} else {
if ($debug>0) echo "Cannot advertise. Advertises denied by $denytxfile lock file.\n";
}
}
?>
Tämä scripti on ajastettu crontabissa
# Katsotaan onko kuuluvuusalueella uusia APRS-asemia ja mainostetaan jos on 4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * tlb /opt/thelinkbox/scripts/aprs-repeater-advertiser.php > /dev/null
