perl/ExtMsg.pm

   1 #
   2 # This class is the internal subclass that deals with the external port
   3 # communications for Msg.pm
   4 #
   5 # This is where the cluster handles direct connections coming both in
   6 # and out
   7 #
   8 # $Id$
   9 #
  10 # Copyright (c) 2001 - Dirk Koopman G1TLH
  11 #
  12
  13 package ExtMsg;
  14
  15 use strict;
  16 use Msg;
  17 use DXVars;
  18 use DXUtil;
  19 use DXDebug;
  20 use IO::File;
  21 use IO::Socket;
  22
  23 use vars qw(@ISA $deftimeout);
  24
  25 @ISA = qw(Msg);
  26 $deftimeout = 60;
  27
  28 sub enqueue
  29 {
  30         my ($conn, $msg) = @_;
  31         unless ($msg =~ /^[ABZ]/) {
  32                 if ($msg =~ /^E[-\w]+\|([01])/ && $conn->{csort} eq 'telnet') {
  33                         $conn->{echo} = $1;
  34                         if ($1) {
  35 #                               $conn->send_raw("\xFF\xFC\x01");
  36                         } else {
  37 #                               $conn->send_raw("\xFF\xFB\x01");
  38                         }
  39                 } else {
  40                         $msg =~ s/^[-\w]+\|//;
  41                         push (@{$conn->{outqueue}}, $msg . $conn->{lineend});
  42                 }
  43         }
  44 }
  45
  46 sub send_raw
  47 {
  48         my ($conn, $msg) = @_;
  49     my $sock = $conn->{sock};
  50     return unless defined($sock);
  51         push (@{$conn->{outqueue}}, $msg);
  52         dbg('connect', $msg) unless $conn->{state} eq 'C';
  53     Msg::set_event_handler ($sock, "write" => sub {$conn->_send(0)});
  54 }
  55
  56 sub dequeue
  57 {
  58         my $conn = shift;
  59         my $msg;
  60
  61         if ($conn->{sort} eq 'ax25' && exists $conn->{msg}) {
  62                 $conn->{msg} =~ s/\cM/\cJ/g;
  63         }
  64         if ($conn->{state} eq 'WC') {
  65                 if (exists $conn->{cmd}) {
  66                         if (@{$conn->{cmd}}) {
  67                                 dbg('connect', $conn->{msg});
  68                                 $conn->_docmd($conn->{msg});
  69                         }
  70                 }
  71                 if ($conn->{state} eq 'WC' && exists $conn->{cmd} && @{$conn->{cmd}} == 0) {
  72                         $conn->to_connected($conn->{call}, 'O', 'telnet');
  73                 }
  74         } elsif ($conn->{msg} =~ /\cJ/) {
  75                 my @lines =  $conn->{msg} =~ /([^\cM\cJ]*)\cM?\cJ/g;
  76                 if ($conn->{msg} =~ /\cJ$/) {
  77                         delete $conn->{msg};
  78                 } else {
  79                         $conn->{msg} = pop @lines;
  80                 }
  81                 while (defined ($msg = shift @lines)) {
  82                         dbg('connect', $msg) unless $conn->{state} eq 'C';
  83
  84                         $msg =~ s/\xff\xfa.*\xff\xf0|\xff[\xf0-\xfe].//g; # remove telnet options
  85                         $msg =~ s/[\x00-\x08\x0a-\x1f\x80-\x9f]/./g;         # immutable CSI sequence + control characters
  86
  87                         if ($conn->{state} eq 'C') {
  88                                 &{$conn->{rproc}}($conn, "I$conn->{call}|$msg");
  89                         } elsif ($conn->{state} eq 'WL' ) {
  90                                 $msg = uc $msg;
  91                                 if (is_callsign($msg)) {
  92                                         $conn->to_connected($msg, 'A', 'telnet');
  93                                 } else {
  94                                         $conn->send_now("Sorry $msg is an invalid callsign");
  95                                         $conn->disconnect;
  96                                 }
  97                         } elsif ($conn->{state} eq 'WC') {
  98                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
  99                                         $conn->_docmd($msg);
 100                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 101                                                 $conn->to_connected($conn->{call}, 'O', 'telnet');
 102                                         }
 103                                 }
 104                         }
 105                 }
 106         }
 107 }
 108
 109 sub to_connected
 110 {
 111         my ($conn, $call, $dir, $sort) = @_;
 112         $conn->{state} = 'C';
 113         $conn->conns($call);
 114         delete $conn->{cmd};
 115         $conn->{timeout}->del if $conn->{timeout};
 116         delete $conn->{timeout};
 117         $conn->_send_file("$main::data/connected");
 118         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 119 }
 120
 121 sub new_client {
 122         my $server_conn = shift;
 123     my $sock = $server_conn->{sock}->accept();
 124     my $conn = $server_conn->new($server_conn->{rproc});
 125         $conn->{sock} = $sock;
 126
 127     my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost} = $sock->peerhost(), $conn->{peerport} = $sock->peerport());
 128         if ($eproc) {
 129                 $conn->{eproc} = $eproc;
 130         Msg::set_event_handler ($sock, "error" => $eproc);
 131         }
 132     if ($rproc) {
 133         $conn->{rproc} = $rproc;
 134         my $callback = sub {$conn->_rcv};
 135                 Msg::set_event_handler ($sock, "read" => $callback);
 136                 # send login prompt
 137                 $conn->{state} = 'WL';
 138 #               $conn->send_raw("\xff\xfe\x01\xff\xfc\x01\ff\fd\x22");
 139 #               $conn->send_raw("\xff\xfa\x22\x01\x01\xff\xf0");
 140 #               $conn->send_raw("\xFF\xFC\x01");
 141                 $conn->_send_file("$main::data/issue");
 142                 $conn->send_raw("login: ");
 143                 $conn->_dotimeout(60);
 144     } else {
 145         $conn->disconnect();
 146     }
 147 }
 148
 149 sub start_connect
 150 {
 151         my $call = shift;
 152         my $fn = shift;
 153         my $conn = ExtMsg->new(\&main::new_channel);
 154         $conn->conns($call);
 155
 156         my $f = new IO::File $fn;
 157         push @{$conn->{cmd}}, <$f>;
 158         $f->close;
 159         $conn->_dotimeout($deftimeout);
 160         $conn->_docmd;
 161 }
 162
 163 sub _docmd
 164 {
 165         my $conn = shift;
 166         my $msg = shift;
 167         my $cmd;
 168
 169         while ($cmd = shift @{$conn->{cmd}}) {
 170                 chomp $cmd;
 171                 next if $cmd =~ /^\s*\#/o;
 172                 next if $cmd =~ /^\s*$/o;
 173                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 174                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 175                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 176                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 177                         unless ($conn->_doconnect($1, $2)) {
 178                                 $conn->disconnect;
 179                                 @{$conn->{cmd}} = [];    # empty any further commands
 180                                 last;
 181                         }
 182                 }
 183                 if ($cmd =~ /^\s*\'.*\'\s+\'.*\'/i) {
 184                         $conn->_dochat($cmd, $msg);
 185                         last;
 186                 }
 187                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 188                         $conn->_doclient($1);
 189                         last;
 190                 }
 191                 last if $conn->{state} eq 'E';
 192         }
 193 }
 194
 195 sub _doconnect
 196 {
 197         my ($conn, $sort, $line) = @_;
 198         my $r;
 199
 200         $sort = lc $sort;
 201         dbg('connect', "CONNECT sort: $sort command: $line");
 202         if ($sort eq 'telnet') {
 203                 # this is a straight network connect
 204                 my ($host, $port) = split /\s+/, $line;
 205                 $port = 23 if !$port;
 206                 $r = $conn->connect($host, $port);
 207                 if ($r) {
 208                         dbg('connect', "Connected to $host $port");
 209                 } else {
 210                         dbg('connect', "***Connect Failed to $host $port $!");
 211                 }
 212         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 213                 my $pid = fork();
 214                 if (defined $pid) {
 215                         if (!$pid) {
 216                                 # in child, unset warnings, disable debugging and general clean up from us
 217                                 $^W = 0;
 218                                 eval "{ package DB; sub DB {} }";
 219                                 DXChannel::closeall();
 220                                 for (@main::listeners) {
 221                                         $_->close_server;
 222                                 }
 223                                 unless ($^O =~ /^MS/) {
 224                                         $SIG{HUP} = 'IGNORE';
 225                                         $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = $SIG{__WARN__} = 'DEFAULT';
 226                                         alarm(0);
 227                                 }
 228                                 exec "$line" or dbg('cron', "exec '$line' failed $!");
 229                         }
 230                         dbg('connect', "program $sort $line started");
 231                         $conn->{pid} = $pid;
 232                         $conn->{sort} = $sort;
 233                         $conn->{lineend} = "\cM" if $sort eq 'ax25';
 234                 } else {
 235                         dbg('connect', "can't $sort fork for $line $!");
 236                 }
 237         } else {
 238                 dbg('err', "invalid type of connection ($sort)");
 239                 $conn->disconnect;
 240         }
 241         return $r;
 242 }
 243
 244 sub _doabort
 245 {
 246         my $conn = shift;
 247         my $string = shift;
 248         dbg('connect', "abort $string");
 249         $conn->{abort} = $string;
 250 }
 251
 252 sub _dotimeout
 253 {
 254         my $conn = shift;
 255         my $val = shift;
 256         dbg('connect', "timeout set to $val");
 257         $conn->{timeout}->del if $conn->{timeout};
 258         $conn->{timeval} = $val;
 259         $conn->{timeout} = Timer->new($val, sub{ &_timedout($conn) });
 260 }
 261
 262 sub _dolineend
 263 {
 264         my $conn = shift;
 265         my $val = shift;
 266         dbg('connect', "lineend set to $val ");
 267         $val =~ s/\\r/\r/g;
 268         $val =~ s/\\n/\n/g;
 269         $conn->{lineend} = $val;
 270 }
 271
 272 sub _dochat
 273 {
 274         my $conn = shift;
 275         my $cmd = shift;
 276         my $line = shift;
 277
 278         if ($line) {
 279                 my ($expect, $send) = $cmd =~ /^\s*\'(.*)\'\s+\'(.*)\'/;
 280                 if ($expect) {
 281                         dbg('connect', "expecting: \"$expect\" received: \"$line\"");
 282                         if ($conn->{abort} && $line =~ /$conn->{abort}/i) {
 283                                 dbg('connect', "aborted on /$conn->{abort}/");
 284                                 $conn->disconnect;
 285                                 delete $conn->{cmd};
 286                                 return;
 287                         }
 288                         if ($line =~ /$expect/i) {
 289                                 dbg('connect', "got: \"$expect\" sending: \"$send\"");
 290                                 $conn->send_later($send);
 291                                 delete $conn->{msg}; # get rid any input if a match
 292                                 return;
 293                         }
 294                 }
 295         }
 296         $conn->{state} = 'WC';
 297         unshift @{$conn->{cmd}}, $cmd;
 298 }
 299
 300 sub _timedout
 301 {
 302         my $conn = shift;
 303         dbg('connect', "timed out after $conn->{timeval} seconds");
 304         $conn->{timeout}->del;
 305         delete $conn->{timeout};
 306         $conn->disconnect;
 307 }
 308
 309 # handle callsign and connection type firtling
 310 sub _doclient
 311 {
 312         my $conn = shift;
 313         my $line = shift;
 314         my @f = split /\s+/, $line;
 315         my $call = uc $f[0] if $f[0];
 316         $conn->conns($call);
 317         $conn->{csort} = $f[1] if $f[1];
 318         $conn->{state} = 'C';
 319         &{$conn->{rproc}}($conn, "O$call|telnet");
 320         delete $conn->{cmd};
 321         $conn->{timeout}->del if $conn->{timeout};
 322 }
 323
 324 sub _send_file
 325 {
 326         my $conn = shift;
 327         my $fn = shift;
 328
 329         if (-e $fn) {
 330                 my $f = new IO::File $fn;
 331                 if ($f) {
 332                         while (<$f>) {
 333                                 chomp;
 334                                 $conn->send_raw($_ . $conn->{lineend});
 335                         }
 336                         $f->close;
 337                 }
 338         }
 339 }