perl/Investigate.pm

   1 #
   2 # Investigate whether an external node is accessible
   3 #
   4 # If it is, make it believable otherwise mark as not
   5 # to be believed.
   6 #
   7 # It is possible to store up state for a node to be
   8 # investigated, so that if it is accessible, its details
   9 # will be passed on to whomsoever might be interested.
  10 #
  11 # Copyright (c) 2004 Dirk Koopman, G1TLH
  12 #
  13 # $Id$
  14 #
  15
  16 use strict;
  17
  18 package Investigate;
  19
  20 use DXDebug;
  21 use DXUtil;
  22
  23
  24 use vars qw($VERSION $BRANCH);
  25 $VERSION = sprintf( "%d.%03d", q$Revision$ =~ /(\d+)\.(\d+)/ );
  26 $BRANCH = sprintf( "%d.%03d", q$Revision$ =~ /\d+\.\d+\.(\d+)\.(\d+)/  || (0,0));
  27 $main::build += $VERSION;
  28 $main::branch += $BRANCH;
  29
  30 use vars qw (%list %valid $pingint $maxpingwait);
  31
  32 $pingint = 5;                                   # interval between pings for each investigation
  33                                                                 # this is to stop floods of pings
  34 $maxpingwait = 120;                             # the maximum time we will wait for a reply to a ping
  35 my $lastping = 0;                               # last ping done
  36 %list = ();                                             # the list of outstanding investigations
  37 %valid = (                                              # valid fields
  38                   call => '0,Callsign',
  39                   start => '0,Started at,atime',
  40                   version => '0,Node Version',
  41                   build => '0,Node Build',
  42                   here => '0,Here?,yesno',
  43                   conf => '0,In Conf?,yesno',
  44                   pingsent => '0,Time ping sent,atime',
  45                   state => '0,State',
  46                   via => '0,Via Node',
  47                   pcxx => '0,Stored PCProt,parray',
  48                  );
  49
  50 my %via = ();
  51
  52 sub new
  53 {
  54         my $pkg = shift;
  55         my $call = shift;
  56         my $via = shift;
  57
  58         my $self = $list{"$via,$call"};
  59         unless ($self) {
  60                 $self = bless {
  61                                            call=>$call,
  62                                            via=>$via,
  63                                            start=>$main::systime,
  64                                            state=>'start',
  65                                            pcxx=>[],
  66                                           }, ref($pkg) || $pkg;
  67                 $list{"$via,$call"} = $self;
  68         }
  69         dbg("Investigate: New $call via $via") if isdbg('investigate');
  70         return $self;
  71 }
  72
  73 sub get
  74 {
  75         return $list{"$_[1],$_[0]"};
  76 }
  77
  78 sub chgstate
  79 {
  80         my $self = shift;
  81         my $state = shift;
  82         dbg("Investigate: $self->{call} via $self->{via} state $self->{state}->$state") if isdbg('investigate');
  83         $self->{state} = $state;
  84 }
  85
  86 sub handle_ping
  87 {
  88         my $self = shift;
  89         dbg("Investigate: ping received for $self->{call} via $self->{via}") if isdbg('investigate');
  90         if ($self->{state} eq 'waitping') {
  91                 $via{$self->{via}} = 0;       # cue up next ping on this interface
  92                 delete $list{"$self->{via},$self->{call}"};
  93                 my $user = DXUser->get_current($self->{via});
  94                 if ($user) {
  95                         $user->set_believe($self->{call});
  96                         $user->put;
  97                 }
  98                 my $dxchan = DXChannel::get($self->{via});
  99                 if ($dxchan) {
 100                         dbg("Investigate: sending PC19 for $self->{call}") if isdbg('investigate');
 101                         foreach my $pc (@{$self->{pcxx}}) {
 102                                 no strict 'refs';
 103                                 my $handle = "handle_$pc->[0]";
 104                                 dbg("Investigate: sending PC$pc->[0] (" . join(',', @$pc) . ")") if isdbg('investigate');
 105                                 my $regex = $pc->[1];
 106                                 $regex =~ s/\^/\\^/g;
 107                                 DXProt::eph_del_regex($regex);
 108                                 $dxchan->$handle(@$pc);
 109                         }
 110                 }
 111         }
 112 }
 113
 114 sub store_pcxx
 115 {
 116         my $self = shift;
 117         dbg("Investigate: Storing (". join(',', @_) . ")") if isdbg('investigate');
 118         push @{$self->{pcxx}}, [@_];
 119 }
 120
 121 sub process
 122 {
 123         while (my ($k, $v) = each %list) {
 124                 if ($v->{state} eq 'start') {
 125                         my $via = $via{$v->{via}} || 0;
 126                         if ($main::systime > $via+$pingint) {
 127                                 DXProt::addping($main::mycall, $v->{call}, $v->{via});
 128                                 $v->{start} = $lastping = $main::systime;
 129                                 dbg("Investigate: ping sent to $v->{call} via $v->{via}") if isdbg('investigate');
 130                                 $v->chgstate('waitping');
 131                                 $via{$v->{via}} = $main::systime;
 132                         }
 133                 } elsif ($v->{state} eq 'waitping') {
 134                         if ($main::systime > $v->{start} + $maxpingwait) {
 135                                 dbg("Investigate: ping timed out on $v->{call} via $v->{via}") if isdbg('investigate');
 136                                 delete $list{$k};
 137                                 my $user = DXUser->get_current($v->{via});
 138                                 if ($user) {
 139                                         $user->lastping($v->{via}, $main::systime);
 140                                         $user->put;
 141                                 }
 142                         }
 143                 }
 144         }
 145 }
 146
 147
 148 sub AUTOLOAD
 149 {
 150         no strict;
 151         my $name = $AUTOLOAD;
 152         return if $name =~ /::DESTROY$/;
 153         $name =~ s/^.*:://o;
 154
 155         confess "Non-existant field '$AUTOLOAD'" if !$valid{$name};
 156
 157         # this clever line of code creates a subroutine which takes over from autoload
 158         # from OO Perl - Conway
 159         *$AUTOLOAD = sub {@_ > 1 ? $_[0]->{$name} = $_[1] : $_[0]->{$name}};
 160         goto &$AUTOLOAD;
 161 }
 162 1;