perl/DXXml/Ping.pm

   1 #
   2 # XML Ping handler
   3 #
   4 #
   5 #
   6 # Copyright (c) Dirk Koopman, G1TLH
   7 #
   8
   9 use strict;
  10
  11 package DXXml::Ping;
  12
  13 use DXDebug;
  14 use DXProt;
  15 use IsoTime;
  16 use Time::HiRes qw(gettimeofday tv_interval);
  17
  18 use vars qw(@ISA %pings);
  19 @ISA = qw(DXXml);
  20 %pings = ();                    # outstanding ping requests outbound
  21
  22 sub handle_input
  23 {
  24         my $self = shift;
  25         my $dxchan = shift;
  26
  27         if ($self->{to} eq $main::mycall) {
  28                 if ($self->{s} eq '1') {
  29                         my $rep = DXXml::Ping->new(to=>$self->{o},
  30                                                                            s=>'0',
  31                                                                            oid=>$self->{id},
  32                                                                            ot=>$self->{t}
  33                                                                           );
  34                         $dxchan->send($rep->toxml);
  35                         if ($dxchan->{outgoing} && abs($dxchan->{lastping} - $main::systime) < 15) {
  36                                 $dxchan->{lastping} += $dxchan->{pingint} / 2;
  37                         }
  38                 } else {
  39                         handle_ping_reply($dxchan, $self->{o}, $self->{ot}, $self->{oid});
  40                 }
  41         } else {
  42                 $self->route($dxchan);
  43         }
  44 }
  45
  46 sub topcxx
  47 {
  48         my $self = shift;
  49         unless (exists $self->{'-pcxx'}) {
  50                 $self->{'-pcxx'} = DXProt::pc51($self->{to}, $self->{o}, $self->{s});
  51         }
  52         return $self->{'-pcxx'};
  53 }
  54
  55 # add a ping request to the ping queues
  56 sub add
  57 {
  58         my ($dxchan, $to, $via) = @_;
  59         my $from = $dxchan->call;
  60         my $ref = $pings{$to} || [];
  61         my $r = {};
  62         my $self = DXXml::Ping->new(to=>$to, '-hirestime'=>[ gettimeofday ], s=>'1');
  63         $self->{u} = $from unless $from eq $main::mycall;
  64         $self->{'-via'} = $via if $via && DXChannel::get($via);
  65         $self->{o} = $main::mycall;
  66         $self->route($dxchan);
  67
  68         push @$ref, $self;
  69         $pings{$to} = $ref;
  70         my $u = DXUser->get_current($to);
  71         if ($u) {
  72                 $u->lastping(($via || $from), $main::systime);
  73                 $u->put;
  74         }
  75 }
  76
  77 sub handle_ping_reply
  78 {
  79         my $fromdxchan = shift;
  80         my $from = shift;
  81         my $ot = shift;
  82         my $oid = shift;
  83         my $fromxml;
  84
  85         if (ref $from) {
  86                 $fromxml = $from;
  87                 $from = $from->{o};
  88         }
  89
  90         # it's a reply, look in the ping list for this one
  91         my $ref = $pings{$from};
  92         return unless $ref;
  93
  94         my $tochan = DXChannel::get($from);
  95         while (@$ref) {
  96                 my $r = shift @$ref;
  97                 my $dxchan = DXChannel::get($r->{o});
  98                 next unless $dxchan;
  99                 my $t = tv_interval($r->{'-hirestime'}, [ gettimeofday ]);
 100                 if ($dxchan->is_node) {
 101                         if ($tochan) {
 102                                 my $nopings = $tochan->user->nopings || $DXProt::obscount;
 103                                 push @{$tochan->{pingtime}}, $t;
 104                                 shift @{$tochan->{pingtime}} if @{$tochan->{pingtime}} > 6;
 105
 106                                 # cope with a missed ping, this means you must set the pingint large enough
 107                                 if ($t > $tochan->{pingint}  && $t < 2 * $tochan->{pingint} ) {
 108                                         $t -= $tochan->{pingint};
 109                                 }
 110
 111                                 # calc smoothed RTT a la TCP
 112                                 if (@{$tochan->{pingtime}} == 1) {
 113                                         $tochan->{pingave} = $t;
 114                                 } else {
 115                                         $tochan->{pingave} = $tochan->{pingave} + (($t - $tochan->{pingave}) / 6);
 116                                 }
 117                                 $tochan->{nopings} = $nopings; # pump up the timer
 118                         }
 119                         _handle_believe($from, $fromdxchan->{call});
 120                 }
 121                 if (exists $r->{u} && ($dxchan = DXChannel::get($r->{u})) && $dxchan->is_user) {
 122                         my $s = sprintf "%.2f", $t;
 123                         my $ave = sprintf "%.2f", $tochan ? ($tochan->{pingave} || $t) : $t;
 124                         $dxchan->send($dxchan->msg('pingi', $from, $s, $ave))
 125                 }
 126         }
 127 }
 128
 129 sub _handle_believe
 130 {
 131         my ($from, $via) = @_;
 132
 133         my $user = DXUser->get_current($from);
 134         if ($user) {
 135                 $user->set_believe($via);
 136                 $user->put;
 137         }
 138 }
 139 1;