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 use IPC::Open3;
  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;
  27 $main::build += $VERSION;
  28 $main::branch += $BRANCH;
  29
  30 use vars qw(@ISA $deftimeout);
  31
  32 @ISA = qw(Msg);
  33 $deftimeout = 60;
  34
  35 sub enqueue
  36 {
  37         my ($conn, $msg) = @_;
  38         unless ($msg =~ /^[ABZ]/) {
  39                 if ($msg =~ /^E[-\w]+\|([01])/ && $conn->{csort} eq 'telnet') {
  40                         $conn->{echo} = $1;
  41                         if ($1) {
  42 #                               $conn->send_raw("\xFF\xFC\x01");
  43                         } else {
  44 #                               $conn->send_raw("\xFF\xFB\x01");
  45                         }
  46                 } else {
  47                         $msg =~ s/^[-\w]+\|//;
  48                         push (@{$conn->{outqueue}}, $msg . $conn->{lineend});
  49                 }
  50         }
  51 }
  52
  53 sub send_raw
  54 {
  55         my ($conn, $msg) = @_;
  56     my $sock = $conn->{sock};
  57     return unless defined($sock);
  58         push (@{$conn->{outqueue}}, $msg);
  59         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
  60     Msg::set_event_handler ($sock, "write" => sub {$conn->_send(0)});
  61 }
  62
  63 sub dequeue
  64 {
  65         my $conn = shift;
  66         my $msg;
  67
  68         if ($conn->{csort} eq 'ax25' && exists $conn->{msg}) {
  69                 $conn->{msg} =~ s/\cM/\cJ/g;
  70         }
  71         if ($conn->{state} eq 'WC') {
  72                 if (exists $conn->{cmd}) {
  73                         if (@{$conn->{cmd}}) {
  74                                 dbg("connect $conn->{cnum}: $conn->{msg}") if isdbg('connect');
  75                                 $conn->_docmd($conn->{msg});
  76                         }
  77                 }
  78                 if ($conn->{state} eq 'WC' && exists $conn->{cmd} && @{$conn->{cmd}} == 0) {
  79                         $conn->to_connected($conn->{call}, 'O', $conn->{csort});
  80                 }
  81         } elsif ($conn->{msg} =~ /\cJ/) {
  82                 my @lines =  $conn->{msg} =~ /([^\cM\cJ]*)\cM?\cJ/g;
  83                 if ($conn->{msg} =~ /\cJ$/) {
  84                         delete $conn->{msg};
  85                 } else {
  86                         $conn->{msg} = pop @lines;
  87                 }
  88                 while (defined ($msg = shift @lines)) {
  89                         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
  90
  91                         $msg =~ s/\xff\xfa.*\xff\xf0|\xff[\xf0-\xfe].//g; # remove telnet options
  92                         $msg =~ s/[\x00-\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g;         # immutable CSI sequence + control characters
  93
  94                         if ($conn->{state} eq 'C') {
  95                                 &{$conn->{rproc}}($conn, "I$conn->{call}|$msg");
  96                         } elsif ($conn->{state} eq 'WL' ) {
  97                                 $msg = uc $msg;
  98                                 if (is_callsign($msg)) {
  99                                         my $sort = $conn->{csort};
 100                                         $sort = 'local' if $conn->{peerhost} eq "127.0.0.1";
 101                                         $conn->to_connected($msg, 'A', $sort);
 102                                 } else {
 103                                         $conn->send_now("Sorry $msg is an invalid callsign");
 104                                         $conn->disconnect;
 105                                 }
 106                         } elsif ($conn->{state} eq 'WC') {
 107                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
 108                                         $conn->_docmd($msg);
 109                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 110                                                 $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 111                                         }
 112                                 }
 113                         }
 114                 }
 115         }
 116 }
 117
 118 sub to_connected
 119 {
 120         my ($conn, $call, $dir, $sort) = @_;
 121         $conn->{state} = 'C';
 122         $conn->conns($call);
 123         delete $conn->{cmd};
 124         $conn->{timeout}->del if $conn->{timeout};
 125         delete $conn->{timeout};
 126         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 127         $conn->_send_file("$main::data/connected") unless $conn->{outgoing};
 128 }
 129
 130 sub new_client {
 131         my $server_conn = shift;
 132     my $sock = $server_conn->{sock}->accept();
 133         if ($sock) {
 134                 my $conn = $server_conn->new($server_conn->{rproc});
 135                 $conn->{sock} = $sock;
 136                 Msg::blocking($sock, 0);
 137                 $conn->{blocking} = 0;
 138                 eval {$conn->{peerhost} = $sock->peerhost};
 139                 if ($@) {
 140                         dbg($@) if isdbg('connll');
 141                         $conn->disconnect;
 142                 } else {
 143                         eval {$conn->{peerport} = $sock->peerport};
 144                         $conn->{peerport} = 0 if $@;
 145                         my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost}, $conn->{peerport});
 146                         dbg("accept $conn->{cnum} from $conn->{peerhost} $conn->{peerport}") if isdbg('connll');
 147                         if ($eproc) {
 148                                 $conn->{eproc} = $eproc;
 149                                 Msg::set_event_handler ($sock, "error" => $eproc);
 150                         }
 151                         if ($rproc) {
 152                                 $conn->{rproc} = $rproc;
 153                                 my $callback = sub {$conn->_rcv};
 154                                 Msg::set_event_handler ($sock, "read" => $callback);
 155                                 # send login prompt
 156                                 $conn->{state} = 'WL';
 157                                 #               $conn->send_raw("\xff\xfe\x01\xff\xfc\x01\ff\fd\x22");
 158                                 #               $conn->send_raw("\xff\xfa\x22\x01\x01\xff\xf0");
 159                                 #               $conn->send_raw("\xFF\xFC\x01");
 160                                 $conn->_send_file("$main::data/issue");
 161                                 $conn->send_raw("login: ");
 162                                 $conn->_dotimeout(60);
 163                         } else {
 164                                 &{$conn->{eproc}}() if $conn->{eproc};
 165                                 $conn->disconnect();
 166                         }
 167                 }
 168         } else {
 169                 dbg("ExtMsg: error on accept ($!)") if isdbg('err');
 170         }
 171 }
 172
 173 sub start_connect
 174 {
 175         my $call = shift;
 176         my $fn = shift;
 177         my $conn = ExtMsg->new(\&main::new_channel);
 178         $conn->{outgoing} = 1;
 179         $conn->conns($call);
 180
 181         my $f = new IO::File $fn;
 182         push @{$conn->{cmd}}, <$f>;
 183         $f->close;
 184         $conn->{state} = 'WC';
 185         $conn->_dotimeout($deftimeout);
 186         $conn->_docmd;
 187 }
 188
 189 sub _docmd
 190 {
 191         my $conn = shift;
 192         my $msg = shift;
 193         my $cmd;
 194
 195         while ($cmd = shift @{$conn->{cmd}}) {
 196                 chomp $cmd;
 197                 next if $cmd =~ /^\s*\#/o;
 198                 next if $cmd =~ /^\s*$/o;
 199                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 200                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 201                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 202                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 203                         unless ($conn->_doconnect($1, $2)) {
 204                                 $conn->disconnect;
 205                                 @{$conn->{cmd}} = [];    # empty any further commands
 206                                 last;
 207                         }
 208                 }
 209                 if ($cmd =~ /^\s*\'([^\']*)\'\s+\'([^\']*)\'/) {
 210                         $conn->_dochat($cmd, $msg, $1, $2);
 211                         last;
 212                 }
 213                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 214                         $conn->_doclient($1);
 215                         last;
 216                 }
 217                 last if $conn->{state} eq 'E';
 218         }
 219 }
 220
 221 sub _doconnect
 222 {
 223         my ($conn, $sort, $line) = @_;
 224         my $r;
 225
 226         $sort = lc $sort;
 227         dbg("CONNECT $conn->{cnum} sort: $sort command: $line") if isdbg('connect');
 228         if ($sort eq 'telnet') {
 229                 # this is a straight network connect
 230                 my ($host, $port) = split /\s+/, $line;
 231                 $port = 23 if !$port;
 232                 $r = $conn->connect($host, $port);
 233                 if ($r) {
 234                         dbg("Connected $conn->{cnum} to $host $port") if isdbg('connect');
 235                 } else {
 236                         dbg("***Connect $conn->{cnum} Failed to $host $port $!") if isdbg('connect');
 237                 }
 238         } elsif ($sort eq 'agw') {
 239                 # turn it into an AGW object
 240                 bless $conn, 'AGWMsg';
 241                 $r = $conn->connect($line);
 242         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 243                 local $^F = 10000;              # make sure it ain't closed on exec
 244                 my ($a, $b) = IO::Socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
 245                 if ($a && $b) {
 246                         $r = 1;
 247                         $a->autoflush(1);
 248                         $b->autoflush(1);
 249                         my $pid = fork;
 250                         if (defined $pid) {
 251                                 if ($pid) {
 252                                         close $b;
 253                                         $conn->{sock} = $a;
 254                                         $conn->{csort} = $sort;
 255                                         $conn->{lineend} = "\cM" if $sort eq 'ax25';
 256                                         $conn->{pid} = $pid;
 257                                         if ($conn->{rproc}) {
 258                                                 my $callback = sub {$conn->_rcv};
 259                                                 Msg::set_event_handler ($a, read => $callback);
 260                                         }
 261                                         dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
 262                                 } else {
 263                                         $^W = 0;
 264                                         dbgclose();
 265                                         STDIN->close;
 266                                         STDOUT->close;
 267                                         STDOUT->close;
 268                                         *STDIN = IO::File->new_from_fd($b, 'r') or die;
 269                                         *STDOUT = IO::File->new_from_fd($b, 'w') or die;
 270                                         *STDERR = IO::File->new_from_fd($b, 'w') or die;
 271                                         close $a;
 272                                         unless ($main::is_win) {
 273 #                                               $SIG{HUP} = 'IGNORE';
 274                                                 $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
 275                                                 alarm(0);
 276                                         }
 277                                         exec "$line" or dbg("exec '$line' failed $!");
 278                                 }
 279                         } else {
 280                                 dbg("cannot fork");
 281                                 $r = undef;
 282                         }
 283                 } else {
 284                         dbg("no socket pair $!");
 285                 }
 286         } else {
 287                 dbg("invalid type of connection ($sort)");
 288         }
 289         $conn->disconnect unless $r;
 290         return $r;
 291 }
 292
 293 sub _doabort
 294 {
 295         my $conn = shift;
 296         my $string = shift;
 297         dbg("connect $conn->{cnum}: abort $string") if isdbg('connect');
 298         $conn->{abort} = $string;
 299 }
 300
 301 sub _dotimeout
 302 {
 303         my $conn = shift;
 304         my $val = shift;
 305         dbg("connect $conn->{cnum}: timeout set to $val") if isdbg('connect');
 306         $conn->{timeout}->del if $conn->{timeout};
 307         $conn->{timeval} = $val;
 308         $conn->{timeout} = Timer->new($val, sub{ &_timedout($conn) });
 309 }
 310
 311 sub _dolineend
 312 {
 313         my $conn = shift;
 314         my $val = shift;
 315         dbg("connect $conn->{cnum}: lineend set to $val ") if isdbg('connect');
 316         $val =~ s/\\r/\r/g;
 317         $val =~ s/\\n/\n/g;
 318         $conn->{lineend} = $val;
 319 }
 320
 321 sub _dochat
 322 {
 323         my $conn = shift;
 324         my $cmd = shift;
 325         my $line = shift;
 326         my $expect = shift;
 327         my $send = shift;
 328
 329         if ($line) {
 330                 if ($expect) {
 331                         dbg("connect $conn->{cnum}: expecting: \"$expect\" received: \"$line\"") if isdbg('connect');
 332                         if ($conn->{abort} && $line =~ /\Q$conn->{abort}/i) {
 333                                 dbg("connect $conn->{cnum}: aborted on /$conn->{abort}/") if isdbg('connect');
 334                                 $conn->disconnect;
 335                                 delete $conn->{cmd};
 336                                 return;
 337                         }
 338                         if ($line =~ /\Q$expect/i) {
 339                                 if (length $send) {
 340                                         dbg("connect $conn->{cnum}: got: \"$expect\" sending: \"$send\"") if isdbg('connect');
 341                                         $conn->send_later("D$conn->{call}|$send");
 342                                 }
 343                                 delete $conn->{msg}; # get rid any input if a match
 344                                 return;
 345                         }
 346                 }
 347         }
 348         $conn->{state} = 'WC';
 349         unshift @{$conn->{cmd}}, $cmd;
 350 }
 351
 352 sub _timedout
 353 {
 354         my $conn = shift;
 355         dbg("connect $conn->{cnum}: timed out after $conn->{timeval} seconds") if isdbg('connect');
 356         $conn->disconnect;
 357 }
 358
 359 # handle callsign and connection type firtling
 360 sub _doclient
 361 {
 362         my $conn = shift;
 363         my $line = shift;
 364         my @f = split /\s+/, $line;
 365         my $call = uc $f[0] if $f[0];
 366         $conn->conns($call);
 367         $conn->{csort} = $f[1] if $f[1];
 368         $conn->{state} = 'C';
 369         &{$conn->{rproc}}($conn, "O$call|$conn->{csort}");
 370         delete $conn->{cmd};
 371         $conn->{timeout}->del if $conn->{timeout};
 372 }
 373
 374 sub _send_file
 375 {
 376         my $conn = shift;
 377         my $fn = shift;
 378
 379         if (-e $fn) {
 380                 my $f = new IO::File $fn;
 381                 if ($f) {
 382                         while (<$f>) {
 383                                 chomp;
 384                                 my $l = $_;
 385                                 dbg("connect $conn->{cnum}: $l") if isdbg('connll');
 386                                 $conn->send_raw($l . $conn->{lineend});
 387                         }
 388                         $f->close;
 389                 }
 390         }
 391 }