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 echo
  64 {
  65         my $conn = shift;
  66         $conn->{echo} = shift;
  67 }
  68
  69 sub dequeue
  70 {
  71         my $conn = shift;
  72         my $msg;
  73
  74         if ($conn->{csort} eq 'ax25' && exists $conn->{msg}) {
  75                 $conn->{msg} =~ s/\cM/\cJ/g;
  76         }
  77         if ($conn->{state} eq 'WC') {
  78                 if (exists $conn->{cmd}) {
  79                         if (@{$conn->{cmd}}) {
  80                                 dbg("connect $conn->{cnum}: $conn->{msg}") if isdbg('connect');
  81                                 $conn->_docmd($conn->{msg});
  82                         }
  83                 }
  84                 if ($conn->{state} eq 'WC' && exists $conn->{cmd} && @{$conn->{cmd}} == 0) {
  85                         $conn->to_connected($conn->{call}, 'O', $conn->{csort});
  86                 }
  87         } elsif ($conn->{msg} =~ /\cJ/) {
  88                 my @lines =  $conn->{msg} =~ /([^\cM\cJ]*)\cM?\cJ/g;
  89                 if ($conn->{msg} =~ /\cJ$/) {
  90                         delete $conn->{msg};
  91                 } else {
  92                         $conn->{msg} =~ s/([^\cM\cJ]*)\cM?\cJ//g;
  93                 }
  94                 while (defined ($msg = shift @lines)) {
  95                         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
  96
  97                         $msg =~ s/\xff\xfa.*\xff\xf0|\xff[\xf0-\xfe].//g; # remove telnet options
  98                         $msg =~ s/[\x00-\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g;         # immutable CSI sequence + control characters
  99
 100                         if ($conn->{state} eq 'C') {
 101                                 &{$conn->{rproc}}($conn, "I$conn->{call}|$msg");
 102                         } elsif ($conn->{state} eq 'WL' ) {
 103                                 $msg = uc $msg;
 104                                 if (is_callsign($msg) && $msg !~ m|/| ) {
 105                                         my $sort = $conn->{csort};
 106                                         $sort = 'local' if $conn->{peerhost} eq "127.0.0.1";
 107                                         my $uref;
 108                                         if ($main::passwdreq || ($uref = DXUser->get_current($msg)) && $uref->passwd ) {
 109                                                 $conn->conns($msg);
 110                                                 $conn->{state} = 'WP';
 111                                                 $conn->{decho} = $conn->{echo};
 112                                                 $conn->{echo} = 0;
 113                                                 $conn->send_raw('password: ');
 114                                         } else {
 115                                                 $conn->to_connected($msg, 'A', $sort);
 116                                         }
 117                                 } else {
 118                                         $conn->send_now("Sorry $msg is an invalid callsign");
 119                                         $conn->disconnect;
 120                                 }
 121                         } elsif ($conn->{state} eq 'WP' ) {
 122                                 my $uref = DXUser->get_current($conn->{call});
 123                                 $msg =~ s/[\r\n]+$//;
 124                                 if ($uref && $msg eq $uref->passwd) {
 125                                         my $sort = $conn->{csort};
 126                                         $conn->{echo} = $conn->{decho};
 127                                         delete $conn->{decho};
 128                                         $sort = 'local' if $conn->{peerhost} eq "127.0.0.1";
 129                                         $conn->{usedpasswd} = 1;
 130                                         $conn->to_connected($conn->{call}, 'A', $sort);
 131                                 } else {
 132                                         $conn->send_now("Sorry");
 133                                         $conn->disconnect;
 134                                 }
 135                         } elsif ($conn->{state} eq 'WC') {
 136                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
 137                                         $conn->_docmd($msg);
 138                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 139                                                 $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 140                                         }
 141                                 }
 142                         }
 143                 }
 144         }
 145 }
 146
 147 sub to_connected
 148 {
 149         my ($conn, $call, $dir, $sort) = @_;
 150         $conn->{state} = 'C';
 151         $conn->conns($call);
 152         delete $conn->{cmd};
 153         $conn->{timeout}->del if $conn->{timeout};
 154         delete $conn->{timeout};
 155         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 156         $conn->_send_file("$main::data/connected") unless $conn->{outgoing};
 157 }
 158
 159 sub new_client {
 160         my $server_conn = shift;
 161     my $sock = $server_conn->{sock}->accept();
 162         if ($sock) {
 163                 my $conn = $server_conn->new($server_conn->{rproc});
 164                 $conn->{sock} = $sock;
 165                 Msg::blocking($sock, 0);
 166                 $conn->{blocking} = 0;
 167                 eval {$conn->{peerhost} = $sock->peerhost};
 168                 if ($@) {
 169                         dbg($@) if isdbg('connll');
 170                         $conn->disconnect;
 171                 } else {
 172                         eval {$conn->{peerport} = $sock->peerport};
 173                         $conn->{peerport} = 0 if $@;
 174                         my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost}, $conn->{peerport});
 175                         dbg("accept $conn->{cnum} from $conn->{peerhost} $conn->{peerport}") if isdbg('connll');
 176                         if ($eproc) {
 177                                 $conn->{eproc} = $eproc;
 178                                 Msg::set_event_handler ($sock, "error" => $eproc);
 179                         }
 180                         if ($rproc) {
 181                                 $conn->{rproc} = $rproc;
 182                                 my $callback = sub {$conn->_rcv};
 183                                 Msg::set_event_handler ($sock, "read" => $callback);
 184                                 # send login prompt
 185                                 $conn->{state} = 'WL';
 186                                 #               $conn->send_raw("\xff\xfe\x01\xff\xfc\x01\ff\fd\x22");
 187                                 #               $conn->send_raw("\xff\xfa\x22\x01\x01\xff\xf0");
 188                                 #               $conn->send_raw("\xFF\xFC\x01");
 189                                 $conn->_send_file("$main::data/issue");
 190                                 $conn->send_raw("login: ");
 191                                 $conn->_dotimeout(60);
 192                                 $conn->{echo} = 1;
 193                         } else {
 194                                 &{$conn->{eproc}}() if $conn->{eproc};
 195                                 $conn->disconnect();
 196                         }
 197                 }
 198         } else {
 199                 dbg("ExtMsg: error on accept ($!)") if isdbg('err');
 200         }
 201 }
 202
 203 sub start_connect
 204 {
 205         my $call = shift;
 206         my $fn = shift;
 207         my $conn = ExtMsg->new(\&main::new_channel);
 208         $conn->{outgoing} = 1;
 209         $conn->conns($call);
 210
 211         my $f = new IO::File $fn;
 212         push @{$conn->{cmd}}, <$f>;
 213         $f->close;
 214         $conn->{state} = 'WC';
 215         $conn->_dotimeout($deftimeout);
 216         $conn->_docmd;
 217 }
 218
 219 sub _docmd
 220 {
 221         my $conn = shift;
 222         my $msg = shift;
 223         my $cmd;
 224
 225         while ($cmd = shift @{$conn->{cmd}}) {
 226                 chomp $cmd;
 227                 next if $cmd =~ /^\s*\#/o;
 228                 next if $cmd =~ /^\s*$/o;
 229                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 230                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 231                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 232                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 233                         unless ($conn->_doconnect($1, $2)) {
 234                                 $conn->disconnect;
 235                                 @{$conn->{cmd}} = [];    # empty any further commands
 236                                 last;
 237                         }
 238                 }
 239                 if ($cmd =~ /^\s*\'([^\']*)\'\s+\'([^\']*)\'/) {
 240                         $conn->_dochat($cmd, $msg, $1, $2);
 241                         last;
 242                 }
 243                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 244                         $conn->_doclient($1);
 245                         last;
 246                 }
 247                 last if $conn->{state} eq 'E';
 248         }
 249 }
 250
 251 sub _doconnect
 252 {
 253         my ($conn, $sort, $line) = @_;
 254         my $r;
 255
 256         $sort = lc $sort;
 257         dbg("CONNECT $conn->{cnum} sort: $sort command: $line") if isdbg('connect');
 258         if ($sort eq 'telnet') {
 259                 # this is a straight network connect
 260                 my ($host, $port) = split /\s+/, $line;
 261                 $port = 23 if !$port;
 262                 $r = $conn->connect($host, $port);
 263                 if ($r) {
 264                         dbg("Connected $conn->{cnum} to $host $port") if isdbg('connect');
 265                 } else {
 266                         dbg("***Connect $conn->{cnum} Failed to $host $port $!") if isdbg('connect');
 267                 }
 268         } elsif ($sort eq 'agw') {
 269                 # turn it into an AGW object
 270                 bless $conn, 'AGWMsg';
 271                 $r = $conn->connect($line);
 272         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 273                 local $^F = 10000;              # make sure it ain't closed on exec
 274                 my ($a, $b) = IO::Socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
 275                 if ($a && $b) {
 276                         $r = 1;
 277                         $a->autoflush(1);
 278                         $b->autoflush(1);
 279                         my $pid = fork;
 280                         if (defined $pid) {
 281                                 if ($pid) {
 282                                         close $b;
 283                                         $conn->{sock} = $a;
 284                                         $conn->{csort} = $sort;
 285                                         $conn->{lineend} = "\cM" if $sort eq 'ax25';
 286                                         $conn->{pid} = $pid;
 287                                         if ($conn->{rproc}) {
 288                                                 my $callback = sub {$conn->_rcv};
 289                                                 Msg::set_event_handler ($a, read => $callback);
 290                                         }
 291                                         dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
 292                                 } else {
 293                                         $^W = 0;
 294                                         dbgclose();
 295                                         STDIN->close;
 296                                         STDOUT->close;
 297                                         STDOUT->close;
 298                                         *STDIN = IO::File->new_from_fd($b, 'r') or die;
 299                                         *STDOUT = IO::File->new_from_fd($b, 'w') or die;
 300                                         *STDERR = IO::File->new_from_fd($b, 'w') or die;
 301                                         close $a;
 302                                         unless ($main::is_win) {
 303 #                                               $SIG{HUP} = 'IGNORE';
 304                                                 $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
 305                                                 alarm(0);
 306                                         }
 307                                         exec "$line" or dbg("exec '$line' failed $!");
 308                                 }
 309                         } else {
 310                                 dbg("cannot fork");
 311                                 $r = undef;
 312                         }
 313                 } else {
 314                         dbg("no socket pair $!");
 315                 }
 316         } else {
 317                 dbg("invalid type of connection ($sort)");
 318         }
 319         $conn->disconnect unless $r;
 320         return $r;
 321 }
 322
 323 sub _doabort
 324 {
 325         my $conn = shift;
 326         my $string = shift;
 327         dbg("connect $conn->{cnum}: abort $string") if isdbg('connect');
 328         $conn->{abort} = $string;
 329 }
 330
 331 sub _dotimeout
 332 {
 333         my $conn = shift;
 334         my $val = shift;
 335         dbg("connect $conn->{cnum}: timeout set to $val") if isdbg('connect');
 336         $conn->{timeout}->del if $conn->{timeout};
 337         $conn->{timeval} = $val;
 338         $conn->{timeout} = Timer->new($val, sub{ &_timedout($conn) });
 339 }
 340
 341 sub _dolineend
 342 {
 343         my $conn = shift;
 344         my $val = shift;
 345         dbg("connect $conn->{cnum}: lineend set to $val ") if isdbg('connect');
 346         $val =~ s/\\r/\r/g;
 347         $val =~ s/\\n/\n/g;
 348         $conn->{lineend} = $val;
 349 }
 350
 351 sub _dochat
 352 {
 353         my $conn = shift;
 354         my $cmd = shift;
 355         my $line = shift;
 356         my $expect = shift;
 357         my $send = shift;
 358
 359         if ($line) {
 360                 if ($expect) {
 361                         dbg("connect $conn->{cnum}: expecting: \"$expect\" received: \"$line\"") if isdbg('connect');
 362                         if ($conn->{abort} && $line =~ /\Q$conn->{abort}/i) {
 363                                 dbg("connect $conn->{cnum}: aborted on /$conn->{abort}/") if isdbg('connect');
 364                                 $conn->disconnect;
 365                                 delete $conn->{cmd};
 366                                 return;
 367                         }
 368                         if ($line =~ /\Q$expect/i) {
 369                                 if (length $send) {
 370                                         dbg("connect $conn->{cnum}: got: \"$expect\" sending: \"$send\"") if isdbg('connect');
 371                                         $conn->send_later("D$conn->{call}|$send");
 372                                 }
 373                                 delete $conn->{msg}; # get rid any input if a match
 374                                 return;
 375                         }
 376                 }
 377         }
 378         $conn->{state} = 'WC';
 379         unshift @{$conn->{cmd}}, $cmd;
 380 }
 381
 382 sub _timedout
 383 {
 384         my $conn = shift;
 385         dbg("connect $conn->{cnum}: timed out after $conn->{timeval} seconds") if isdbg('connect');
 386         $conn->disconnect;
 387 }
 388
 389 # handle callsign and connection type firtling
 390 sub _doclient
 391 {
 392         my $conn = shift;
 393         my $line = shift;
 394         my @f = split /\s+/, $line;
 395         my $call = uc $f[0] if $f[0];
 396         $conn->conns($call);
 397         $conn->{csort} = $f[1] if $f[1];
 398         $conn->{state} = 'C';
 399         &{$conn->{rproc}}($conn, "O$call|$conn->{csort}");
 400         delete $conn->{cmd};
 401         $conn->{timeout}->del if $conn->{timeout};
 402 }
 403
 404 sub _send_file
 405 {
 406         my $conn = shift;
 407         my $fn = shift;
 408
 409         if (-e $fn) {
 410                 my $f = new IO::File $fn;
 411                 if ($f) {
 412                         while (<$f>) {
 413                                 chomp;
 414                                 my $l = $_;
 415                                 dbg("connect $conn->{cnum}: $l") if isdbg('connll');
 416                                 $conn->send_raw($l . $conn->{lineend});
 417                         }
 418                         $f->close;
 419                 }
 420         }
 421 }