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 $dxchan = shift;
  32
  33         if ($self->{to} eq $main::mycall) {
  34                 if ($self->{s} eq '1') {
  35                         my $rep = DXXml::Ping->new(to=>$self->{o},
  36                                                                            s=>'0',
  37                                                                            oid=>$self->{id},
  38                                                                            ot=>$self->{t}
  39                                                                           );
  40                         $dxchan->send($rep->toxml);
  41                         if ($dxchan->{outgoing} && abs($dxchan->{lastping} - $main::systime) < 15) {
  42                                 $dxchan->{lastping} += $dxchan->{pingint} / 2;
  43                         }
  44                 } else {
  45                         handle_ping_reply($dxchan, $self->{o}, $self->{ot}, $self->{oid});
  46                 }
  47         } else {
  48                 $self->route($dxchan);
  49         }
  50 }
  51
  52 sub topcxx
  53 {
  54         my $self = shift;
  55         unless (exists $self->{'-pcxx'}) {
  56                 $self->{'-pcxx'} = DXProt::pc51($self->{to}, $self->{o}, $self->{s});
  57         }
  58         return $self->{'-pcxx'};
  59 }
  60
  61 # add a ping request to the ping queues
  62 sub add
  63 {
  64         my ($dxchan, $to, $via) = @_;
  65         my $from = $dxchan->call;
  66         my $ref = $pings{$to} || [];
  67         my $r = {};
  68         my $self = DXXml::Ping->new(to=>$to, '-hirestime'=>[ gettimeofday ], s=>'1');
  69         $self->{u} = $from unless $from eq $main::mycall;
  70         $self->{'-via'} = $via if $via && DXChannel::get($via);
  71         $self->{o} = $main::mycall;
  72         $self->route($dxchan);
  73
  74         push @$ref, $self;
  75         $pings{$to} = $ref;
  76         my $u = DXUser->get_current($to);
  77         if ($u) {
  78                 $u->lastping(($via || $from), $main::systime);
  79                 $u->put;
  80         }
  81 }
  82
  83 sub handle_ping_reply
  84 {
  85         my $fromdxchan = shift;
  86         my $from = shift;
  87         my $ot = shift;
  88         my $oid = shift;
  89         my $fromxml;
  90
  91         if (ref $from) {
  92                 $fromxml = $from;
  93                 $from = $from->{o};
  94         }
  95
  96         # it's a reply, look in the ping list for this one
  97         my $ref = $pings{$from};
  98         return unless $ref;
  99
 100         my $tochan = DXChannel::get($from);
 101         while (@$ref) {
 102                 my $r = shift @$ref;
 103                 my $dxchan = DXChannel::get($r->{o});
 104                 next unless $dxchan;
 105                 my $t = tv_interval($r->{'-hirestime'}, [ gettimeofday ]);
 106                 if ($dxchan->is_node) {
 107                         if ($tochan) {
 108                                 my $nopings = $tochan->user->nopings || $DXProt::obscount;
 109                                 push @{$tochan->{pingtime}}, $t;
 110                                 shift @{$tochan->{pingtime}} if @{$tochan->{pingtime}} > 6;
 111
 112                                 # cope with a missed ping, this means you must set the pingint large enough
 113                                 if ($t > $tochan->{pingint}  && $t < 2 * $tochan->{pingint} ) {
 114                                         $t -= $tochan->{pingint};
 115                                 }
 116
 117                                 # calc smoothed RTT a la TCP
 118                                 if (@{$tochan->{pingtime}} == 1) {
 119                                         $tochan->{pingave} = $t;
 120                                 } else {
 121                                         $tochan->{pingave} = $tochan->{pingave} + (($t - $tochan->{pingave}) / 6);
 122                                 }
 123                                 $tochan->{nopings} = $nopings; # pump up the timer
 124                         }
 125                         _handle_believe($from, $fromdxchan->{call});
 126                 }
 127                 if (exists $r->{u} && ($dxchan = DXChannel::get($r->{u})) && $dxchan->is_user) {
 128                         my $s = sprintf "%.2f", $t;
 129                         my $ave = sprintf "%.2f", $tochan ? ($tochan->{pingave} || $t) : $t;
 130                         $dxchan->send($dxchan->msg('pingi', $from, $s, $ave))
 131                 }
 132         }
 133 }
 134
 135 sub _handle_believe
 136 {
 137         my ($from, $via) = @_;
 138
 139         if (my $ivp = Investigate::get($from, $via)) {
 140                 $ivp->handle_ping;
 141         } else {
 142                 my $user = DXUser->get_current($from);
 143                 if ($user) {
 144                         $user->set_believe($via);
 145                         $user->put;
 146                 }
 147         }
 148 }
 149 1;