perl/DXXml/Ping.pm

   1 #
   2 # XML Ping handler
   3 #
   4 # $Id$
   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 Investigate;
  17 use Time::HiRes qw(gettimeofday tv_interval);
  18
  19 use vars qw($VERSION $BRANCH @ISA %pings);
  20 $VERSION = sprintf( "%d.%03d", q$Revision$ =~ /(\d+)\.(\d+)/ );
  21 $BRANCH = sprintf( "%d.%03d", q$Revision$ =~ /\d+\.\d+\.(\d+)\.(\d+)/  || (0,0));
  22 $main::build += $VERSION;
  23 $main::branch += $BRANCH;
  24
  25 @ISA = qw(DXXml);
  26 %pings = ();                    # outstanding ping requests outbound
  27
  28 sub handle_input
  29 {
  30         my $self = shift;
  31         my $dxchan = shift;
  32
  33 }
  34
  35 sub topcxx
  36 {
  37         my $self = shift;
  38         unless (exists $self->{'-pcxx'}) {
  39                 $self->{'-pcxx'} = DXProt::pc51($self->{to}, $self->{o}, $self->{s});
  40         }
  41         return $self->{'-pcxx'};
  42 }
  43
  44 # add a ping request to the ping queues
  45 sub add
  46 {
  47         my ($dxchan, $to, $via) = @_;
  48         my $from = $dxchan->call;
  49         my $ref = $pings{$to} || [];
  50         my $r = {};
  51         my $self = DXXml::Ping->new(to=>$to, '-hirestime'=>[ gettimeofday ], s=>'1');
  52         $self->{u} = $from unless $from eq $main::mycall;
  53         $self->{'-via'} = $via if $via && DXChannel::get($via);
  54         $self->{o} = $main::mycall;
  55         $self->{id} = $self->nextid;
  56         $self->route($dxchan);
  57
  58         push @$ref, $self;
  59         $pings{$to} = $ref;
  60         my $u = DXUser->get_current($to);
  61         if ($u) {
  62                 $u->lastping(($via || $from), $main::systime);
  63                 $u->put;
  64         }
  65 }
  66
  67 sub handle_ping_reply
  68 {
  69         my $fromdxchan = shift;
  70         my $from = shift;
  71         my $fromxml;
  72
  73         if (ref $from) {
  74                 $fromxml = $from;
  75                 $from = $from->{o};
  76         }
  77
  78         # it's a reply, look in the ping list for this one
  79         my $ref = $pings{$from};
  80         return unless $ref;
  81
  82         my $tochan = DXChannel::get($from);
  83         while (@$ref) {
  84                 my $r = shift @$ref;
  85                 my $dxchan = DXChannel::get($r->{to});
  86                 next unless $dxchan;
  87                 my $t = tv_interval($r->{'-hirestime'}, [ gettimeofday ]);
  88                 if ($dxchan->is_user) {
  89                         my $s = sprintf "%.2f", $t;
  90                         my $ave = sprintf "%.2f", $tochan ? ($tochan->{pingave} || $t) : $t;
  91                         $dxchan->send($dxchan->msg('pingi', $from, $s, $ave))
  92                 } elsif ($dxchan->is_node) {
  93                         if ($tochan) {
  94                                 my $nopings = $tochan->user->nopings || $DXProt::obscount;
  95                                 push @{$tochan->{pingtime}}, $t;
  96                                 shift @{$tochan->{pingtime}} if @{$tochan->{pingtime}} > 6;
  97
  98                                 # cope with a missed ping, this means you must set the pingint large enough
  99                                 if ($t > $tochan->{pingint}  && $t < 2 * $tochan->{pingint} ) {
 100                                         $t -= $tochan->{pingint};
 101                                 }
 102
 103                                 # calc smoothed RTT a la TCP
 104                                 if (@{$tochan->{pingtime}} == 1) {
 105                                         $tochan->{pingave} = $t;
 106                                 } else {
 107                                         $tochan->{pingave} = $tochan->{pingave} + (($t - $tochan->{pingave}) / 6);
 108                                 }
 109                                 $tochan->{nopings} = $nopings; # pump up the timer
 110                                 if (my $ivp = Investigate::get($from, $fromdxchan->{call})) {
 111                                         $ivp->handle_ping;
 112                                 }
 113                         } elsif (my $rref = Route::Node::get($r->{to})) {
 114                                 if (my $ivp = Investigate::get($from, $fromdxchan->{to})) {
 115                                         $ivp->handle_ping;
 116                                 }
 117                         }
 118                 }
 119         }
 120 }
 121
 122 1;