--- /dev/null
+#
+# The RBN connection system
+#
+# Copyright (c) 2020 Dirk Koopman G1TLH
+#
+
+use warnings;
+use strict;
+
+package RBN;
+
+use 5.10.1;
+
+use DXUtil;
+use DXDebug;
+use DXLog;
+use DXUser;
+use DXChannel;
+use Math::Round qw(nearest);
+
+our @ISA = qw(DXChannel);
+
+sub new
+{
+ my $self = DXChannel::alloc(@_);
+
+ # routing, this must go out here to prevent race condx
+ my $pkg = shift;
+ my $call = shift;
+
+ DXProt::_add_thingy($main::routeroot, [$call, 0, 0, 1, undef, undef, $self->hostname], );
+ $self->{d} = {};
+ $self->{spot} = {};
+ $self->{last} = 0;
+ $self->{noraw} = 0;
+ $self->{nospot} = 0;
+ $self->{norbn} = 0;
+ $self->{sort} = 'N';
+ $self->{lasttime} = $main::systime;
+ $self->{minspottime} = 60*60;
+ $self->{showstats} = 0;
+
+ return $self;
+}
+
+sub start
+{
+ my ($self, $line, $sort) = @_;
+ my $user = $self->{user};
+ my $call = $self->{call};
+ my $name = $user->{name};
+ my $dref = $self->{d};
+ my $spotref = $self->{spot};
+
+ # log it
+ my $host = $self->{conn}->peerhost;
+ $host ||= "unknown";
+ $self->{hostname} = $host;
+
+ $self->{name} = $name ? $name : $call;
+ $self->state('prompt'); # a bit of room for further expansion, passwords etc
+ $self->{lang} = $user->lang || $main::lang || 'en';
+ if ($line =~ /host=/) {
+ my ($h) = $line =~ /host=(\d+\.\d+\.\d+\.\d+)/;
+ $line =~ s/\s*host=\d+\.\d+\.\d+\.\d+// if $h;
+ unless ($h) {
+ ($h) = $line =~ /host=([\da..fA..F:]+)/;
+ $line =~ s/\s*host=[\da..fA..F:]+// if $h;
+ }
+ $self->{hostname} = $h if $h;
+ }
+ $self->{width} = 80 unless $self->{width} && $self->{width} > 80;
+ $self->{consort} = $line; # save the connection type
+
+ LogDbg('DXCommand', "$call connected from $self->{hostname}");
+
+ # set some necessary flags on the user if they are connecting
+ $self->{registered} = 1;
+ # sort out privilege reduction
+ $self->{priv} = 0;
+
+ # get the filters
+ my $nossid = $call;
+ $nossid =~ s/-\d+$//;
+
+ $self->{spotsfilter} = Filter::read_in('spots', $call, 0)
+ || Filter::read_in('spots', $nossid, 0)
+ || Filter::read_in('spots', 'user_default', 0);
+
+ # clean up qra locators
+ my $qra = $user->qra;
+ $qra = undef if ($qra && !DXBearing::is_qra($qra));
+ unless ($qra) {
+ my $lat = $user->lat;
+ my $long = $user->long;
+ $user->qra(DXBearing::lltoqra($lat, $long)) if (defined $lat && defined $long);
+ }
+}
+
+sub normal
+{
+ my $self = shift;
+ my $line = shift;
+ my @ans;
+ my $d = $self->{d};
+ my $spot = $self->{spot};
+
+ # save this for them's that need it
+ my $rawline = $line;
+
+ # remove leading and trailing spaces
+ chomp $line;
+ $line =~ s/^\s*//;
+ $line =~ s/\s*$//;
+
+ # add base RBN
+
+ my $tim = $main::systime;
+
+ # parse line
+ dbg "RBN:RAW,$line" if isdbg('rbnraw');
+
+ my ($origin, $qrg, $call, $mode, $s, $m, $spd, $u, $sort, $t, $tx) = split /[:\s]+/, $line;
+ $tx ||= '';
+ dbg qq{0:$origin 1:$qrg 2:$call 3:$mode 4:$s 5:m 6:$spd 7:$u 8:$sort 9:$t 10:$tx} if $line =~ /DX/;
+
+ my $b;
+
+ if ($t || $tx) {
+
+ # fix up times for things like 'NXDXF B' etc
+ if ($tx && $t !~ /^\d{4}Z$/) {
+ if ($tx =~ /^\d{4}Z$/) {
+ $b = $t;
+ $t = $tx;
+ } else {
+ dbg "RBN:ERR,$line";
+ return (0);
+ }
+ }
+
+ # We have an RBN data line, dedupe it very simply on time, ignore QRG completely.
+ # This works because the skimmers are NTP controlled (or should be) and will receive
+ # the spot at the same time (velocity factor of the atmosphere and network delays
+ # carefully (not) taken into account :-)
+
+ # Note, there is no intelligence here, but there are clearly basic heuristics that could
+ # be applied at this point that reject (more likely rewrite) the call of a busted spot that would
+ # useful for a zonal hotspot requirement from the cluster node.
+
+ # In reality, this mechanism would be incorporated within the cluster code, utilising the dxqsl database,
+ # and other resources in DXSpider, thus creating a zone map for an emitted spot. This is then passed through the
+ # normal "to-user" spot system (where normal spots are sent to be displayed per user) and then be
+ # processed through the normal, per user, spot filtering system - like a regular spot.
+
+ # The key to this is deducing the true callsign by "majority voting" (the greater the number of spotters
+ # the more effective this is) together with some lexical analsys probably in conjuction with DXSpider
+ # data sources (for singleton spots) to then generate a "centre" from and to zone (whatever that will mean if it isn't the usual one)
+ # and some heuristical "Kwalitee" rating given distance from the zone centres of spotter, recipient user
+ # and spotted. A map can be generated once per user and spotter as they are essentially mostly static.
+ # The spotted will only get a coarse position unless other info is available. Programs that parse
+ # DX bulletins and the online data online databases could be be used and then cached.
+
+ # Obviously users have to opt in to receiving RBN spots and other users will simply be passed over and
+ # ignored.
+
+ # Clearly this will only work in the 'mojo' branch of DXSpider where it is possible to pass off external
+ # data requests to ephemeral or semi resident forked processes that do any grunt work and the main
+ # process to just the standard "message passing" which has been shown to be able to sustain over 5000
+ # per second (limited by the test program's output and network speed, rather than DXSpider's handling).
+
+ my $p = "$t|$call";
+ ++$self->{noraw};
+ return if $d->{$p};
+
+ # new RBN input
+ $d->{$p} = $tim;
+ ++$self->{norbn};
+ $qrg = sprintf('%.1f', nearest(.1, $qrg)); # to nearest 100Hz (to catch the odd multiple decpl QRG [eg '7002.07']).
+ if (isdbg('rbnraw')) {
+ my $ss = join(',', "RBN", $origin, $qrg, $call, $mode, $s, $m, $spd, $u, $sort, $t);
+ $ss .= ",$b" if $b;
+ dbg "RBNRAW:$ss";
+ }
+
+ # Determine whether to "SPOT" it based on whether we have not seen it before (near this QRG) or,
+ # if we have, has it been a "while" since the last time we spotted it? If it has been spotted
+ # before then "RESPOT" it.
+ my $nqrg = nearest(1, $qrg); # normalised to nearest Khz
+ my $sp = "$call|$nqrg"; # hopefully the skimmers will be calibrated at least this well!
+ my $ts = $spot->{$sp};
+
+ if (!$ts || ($self->{minspottime} > 0 && $tim - $ts >= $self->{minspottime})) {
+ ++$self->{nospot};
+ my $tag = $ts ? "RESPOT" : "SPOT";
+ $t .= ",$b" if $b;
+ dbg "RBN:" . join(',', $tag, $origin, $qrg, $call, $mode, $s, $m, $spd, $u, $sort, $t);
+ $spot->{$sp} = $tim;
+ }
+ } else {
+ dbg "RBN:DATA,$line" if isdbg('rbn');
+ }
+
+ # periodic clearing out of the two caches
+ if (($tim % 60 == 0 && $tim > $self->{last}) || ($self->{last} && $tim >= $self->{last} + 60)) {
+ my $count = 0;
+ my $removed = 0;
+
+ while (my ($k,$v) = each %{$d}) {
+ if ($tim-$v > 60) {
+ delete $d->{$k};
+ ++$removed
+ } else {
+ ++$count;
+ }
+ }
+ dbg "RBN:ADMIN,rbn cache: $removed removed $count remain" if isdbg('rbn');
+ $count = $removed = 0;
+ while (my ($k,$v) = each %{$spot}) {
+ if ($tim-$v > $self->{minspottime}*2) {
+ delete $spot->{$k};
+ ++$removed;
+ } else {
+ ++$count;
+ }
+ }
+ dbg "RBN:ADMIN,spot cache: $removed removed $count remain" if isdbg('rbn');
+
+ dbg "RBN:" . join(',', "STAT", $self->{noraw}, $self->{norbn}, $self->{nospot}) if $self->{showstats};
+ $self->{noraw} = $self->{norbn} = $self->{nospot} = 0;
+
+ $self->{last} = int($tim / 60) * 60;
+ }
+}
+
+
+
+
+1;
projects / spider.git / commitdiff