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(@ISA $deftimeout);
  25
  26 @ISA = qw(Msg);
  27 $deftimeout = 60;
  28
  29 sub enqueue
  30 {
  31         my ($conn, $msg) = @_;
  32         unless ($msg =~ /^[ABZ]/) {
  33                 if ($msg =~ /^E[-\w]+\|([01])/ && $conn->{csort} eq 'telnet') {
  34                         $conn->{echo} = $1;
  35                         if ($1) {
  36 #                               $conn->send_raw("\xFF\xFC\x01");
  37                         } else {
  38 #                               $conn->send_raw("\xFF\xFB\x01");
  39                         }
  40                 } else {
  41                         $msg =~ s/^[-\w]+\|//;
  42                         push (@{$conn->{outqueue}}, $msg . $conn->{lineend});
  43                 }
  44         }
  45 }
  46
  47 sub send_raw
  48 {
  49         my ($conn, $msg) = @_;
  50     my $sock = $conn->{sock};
  51     return unless defined($sock);
  52         push (@{$conn->{outqueue}}, $msg);
  53         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
  54     Msg::set_event_handler ($sock, "write" => sub {$conn->_send(0)});
  55 }
  56
  57 sub dequeue
  58 {
  59         my $conn = shift;
  60         my $msg;
  61
  62         if ($conn->{csort} eq 'ax25' && exists $conn->{msg}) {
  63                 $conn->{msg} =~ s/\cM/\cJ/g;
  64         }
  65         if ($conn->{state} eq 'WC') {
  66                 if (exists $conn->{cmd}) {
  67                         if (@{$conn->{cmd}}) {
  68                                 dbg("connect $conn->{cnum}: $conn->{msg}") if isdbg('connect');
  69                                 $conn->_docmd($conn->{msg});
  70                         }
  71                 }
  72                 if ($conn->{state} eq 'WC' && exists $conn->{cmd} && @{$conn->{cmd}} == 0) {
  73                         $conn->to_connected($conn->{call}, 'O', $conn->{csort});
  74                 }
  75         } elsif ($conn->{msg} =~ /\cJ/) {
  76                 my @lines =  $conn->{msg} =~ /([^\cM\cJ]*)\cM?\cJ/g;
  77                 if ($conn->{msg} =~ /\cJ$/) {
  78                         delete $conn->{msg};
  79                 } else {
  80                         $conn->{msg} = pop @lines;
  81                 }
  82                 while (defined ($msg = shift @lines)) {
  83                         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
  84
  85                         $msg =~ s/\xff\xfa.*\xff\xf0|\xff[\xf0-\xfe].//g; # remove telnet options
  86                         $msg =~ s/[\x00-\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g;         # immutable CSI sequence + control characters
  87
  88                         if ($conn->{state} eq 'C') {
  89                                 &{$conn->{rproc}}($conn, "I$conn->{call}|$msg");
  90                         } elsif ($conn->{state} eq 'WL' ) {
  91                                 $msg = uc $msg;
  92                                 if (is_callsign($msg)) {
  93                                         my $sort = $conn->{csort};
  94                                         $sort = 'local' if $conn->{peerhost} eq "127.0.0.1";
  95                                         $conn->to_connected($msg, 'A', $sort);
  96                                 } else {
  97                                         $conn->send_now("Sorry $msg is an invalid callsign");
  98                                         $conn->disconnect;
  99                                 }
 100                         } elsif ($conn->{state} eq 'WC') {
 101                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
 102                                         $conn->_docmd($msg);
 103                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 104                                                 $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 105                                         }
 106                                 }
 107                         }
 108                 }
 109         }
 110 }
 111
 112 sub to_connected
 113 {
 114         my ($conn, $call, $dir, $sort) = @_;
 115         $conn->{state} = 'C';
 116         $conn->conns($call);
 117         delete $conn->{cmd};
 118         $conn->{timeout}->del if $conn->{timeout};
 119         delete $conn->{timeout};
 120         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 121         $conn->_send_file("$main::data/connected") unless $conn->{outgoing};
 122 }
 123
 124 sub new_client {
 125         my $server_conn = shift;
 126     my $sock = $server_conn->{sock}->accept();
 127         if ($sock) {
 128                 my $conn = $server_conn->new($server_conn->{rproc});
 129                 $conn->{sock} = $sock;
 130                 Msg::blocking($sock, 0);
 131                 $conn->{blocking} = 0;
 132                 eval {$conn->{peerhost} = $sock->peerhost};
 133                 if ($@) {
 134                         dbg($@) if isdbg('connll');
 135                         $conn->disconnect;
 136                 } else {
 137                         eval {$conn->{peerport} = $sock->peerport};
 138                         $conn->{peerport} = 0 if $@;
 139                         my ($rproc, $eproc) = &{$server_conn->{rproc}} ($conn, $conn->{peerhost}, $conn->{peerport});
 140                         dbg("accept $conn->{cnum} from $conn->{peerhost} $conn->{peerport}") if isdbg('connll');
 141                         if ($eproc) {
 142                                 $conn->{eproc} = $eproc;
 143                                 Msg::set_event_handler ($sock, "error" => $eproc);
 144                         }
 145                         if ($rproc) {
 146                                 $conn->{rproc} = $rproc;
 147                                 my $callback = sub {$conn->_rcv};
 148                                 Msg::set_event_handler ($sock, "read" => $callback);
 149                                 # send login prompt
 150                                 $conn->{state} = 'WL';
 151                                 #               $conn->send_raw("\xff\xfe\x01\xff\xfc\x01\ff\fd\x22");
 152                                 #               $conn->send_raw("\xff\xfa\x22\x01\x01\xff\xf0");
 153                                 #               $conn->send_raw("\xFF\xFC\x01");
 154                                 $conn->_send_file("$main::data/issue");
 155                                 $conn->send_raw("login: ");
 156                                 $conn->_dotimeout(60);
 157                         } else {
 158                                 &{$conn->{eproc}}() if $conn->{eproc};
 159                                 $conn->disconnect();
 160                         }
 161                 }
 162         } else {
 163                 dbg("ExtMsg: error on accept ($!)") if isdbg('err');
 164         }
 165 }
 166
 167 sub start_connect
 168 {
 169         my $call = shift;
 170         my $fn = shift;
 171         my $conn = ExtMsg->new(\&main::new_channel);
 172         $conn->{outgoing} = 1;
 173         $conn->conns($call);
 174
 175         my $f = new IO::File $fn;
 176         push @{$conn->{cmd}}, <$f>;
 177         $f->close;
 178         $conn->{state} = 'WC';
 179         $conn->_dotimeout($deftimeout);
 180         $conn->_docmd;
 181 }
 182
 183 sub _docmd
 184 {
 185         my $conn = shift;
 186         my $msg = shift;
 187         my $cmd;
 188
 189         while ($cmd = shift @{$conn->{cmd}}) {
 190                 chomp $cmd;
 191                 next if $cmd =~ /^\s*\#/o;
 192                 next if $cmd =~ /^\s*$/o;
 193                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 194                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 195                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 196                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 197                         unless ($conn->_doconnect($1, $2)) {
 198                                 $conn->disconnect;
 199                                 @{$conn->{cmd}} = [];    # empty any further commands
 200                                 last;
 201                         }
 202                 }
 203                 if ($cmd =~ /^\s*\'.*\'\s+\'.*\'/i) {
 204                         $conn->_dochat($cmd, $msg);
 205                         last;
 206                 }
 207                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 208                         $conn->_doclient($1);
 209                         last;
 210                 }
 211                 last if $conn->{state} eq 'E';
 212         }
 213 }
 214
 215 sub _doconnect
 216 {
 217         my ($conn, $sort, $line) = @_;
 218         my $r;
 219
 220         $sort = lc $sort;
 221         dbg("CONNECT $conn->{cnum} sort: $sort command: $line") if isdbg('connect');
 222         if ($sort eq 'telnet') {
 223                 # this is a straight network connect
 224                 my ($host, $port) = split /\s+/, $line;
 225                 $port = 23 if !$port;
 226                 $r = $conn->connect($host, $port);
 227                 if ($r) {
 228                         dbg("Connected $conn->{cnum} to $host $port") if isdbg('connect');
 229                 } else {
 230                         dbg("***Connect $conn->{cnum} Failed to $host $port $!") if isdbg('connect');
 231                 }
 232         } elsif ($sort eq 'agw') {
 233                 # turn it into an AGW object
 234                 bless $conn, 'AGWMsg';
 235                 $r = $conn->connect($line);
 236         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 237                 local $^F = 10000;              # make sure it ain't closed on exec
 238                 my ($a, $b) = IO::Socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
 239                 if ($a && $b) {
 240                         $r = 1;
 241                         $a->autoflush(1);
 242                         $b->autoflush(1);
 243                         my $pid = fork;
 244                         if (defined $pid) {
 245                                 if ($pid) {
 246                                         close $b;
 247                                         $conn->{sock} = $a;
 248                                         $conn->{csort} = $sort;
 249                                         $conn->{lineend} = "\cM" if $sort eq 'ax25';
 250                                         $conn->{pid} = $pid;
 251                                         if ($conn->{rproc}) {
 252                                                 my $callback = sub {$conn->_rcv};
 253                                                 Msg::set_event_handler ($a, read => $callback);
 254                                         }
 255                                         dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
 256                                 } else {
 257                                         $^W = 0;
 258                                         dbgclose();
 259                                         STDIN->close;
 260                                         STDOUT->close;
 261                                         STDOUT->close;
 262                                         *STDIN = IO::File->new_from_fd($b, 'r') or die;
 263                                         *STDOUT = IO::File->new_from_fd($b, 'w') or die;
 264                                         *STDERR = IO::File->new_from_fd($b, 'w') or die;
 265                                         close $a;
 266                                         unless ($main::is_win) {
 267 #                                               $SIG{HUP} = 'IGNORE';
 268                                                 $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
 269                                                 alarm(0);
 270                                         }
 271                                         exec "$line" or dbg("exec '$line' failed $!");
 272                                 }
 273                         } else {
 274                                 dbg("cannot fork");
 275                                 $r = undef;
 276                         }
 277                 } else {
 278                         dbg("no socket pair $!");
 279                 }
 280         } else {
 281                 dbg("invalid type of connection ($sort)");
 282         }
 283         $conn->disconnect unless $r;
 284         return $r;
 285 }
 286
 287 sub _doabort
 288 {
 289         my $conn = shift;
 290         my $string = shift;
 291         dbg("connect $conn->{cnum}: abort $string") if isdbg('connect');
 292         $conn->{abort} = $string;
 293 }
 294
 295 sub _dotimeout
 296 {
 297         my $conn = shift;
 298         my $val = shift;
 299         dbg("connect $conn->{cnum}: timeout set to $val") if isdbg('connect');
 300         $conn->{timeout}->del if $conn->{timeout};
 301         $conn->{timeval} = $val;
 302         $conn->{timeout} = Timer->new($val, sub{ &_timedout($conn) });
 303 }
 304
 305 sub _dolineend
 306 {
 307         my $conn = shift;
 308         my $val = shift;
 309         dbg("connect $conn->{cnum}: lineend set to $val ") if isdbg('connect');
 310         $val =~ s/\\r/\r/g;
 311         $val =~ s/\\n/\n/g;
 312         $conn->{lineend} = $val;
 313 }
 314
 315 sub _dochat
 316 {
 317         my $conn = shift;
 318         my $cmd = shift;
 319         my $line = shift;
 320
 321         if ($line) {
 322                 my ($expect, $send) = $cmd =~ /^\s*\'(.*)\'\s+\'(.*)\'/;
 323                 if ($expect) {
 324                         dbg("connect $conn->{cnum}: expecting: \"$expect\" received: \"$line\"") if isdbg('connect');
 325                         if ($conn->{abort} && $line =~ /\Q$conn->{abort}/i) {
 326                                 dbg("connect $conn->{cnum}: aborted on /$conn->{abort}/") if isdbg('connect');
 327                                 $conn->disconnect;
 328                                 delete $conn->{cmd};
 329                                 return;
 330                         }
 331                         if ($line =~ /\Q$expect/i) {
 332                                 if (length $send) {
 333                                         dbg("connect $conn->{cnum}: got: \"$expect\" sending: \"$send\"") if isdbg('connect');
 334                                         $conn->send_later("D$conn->{call}|$send");
 335                                 }
 336                                 delete $conn->{msg}; # get rid any input if a match
 337                                 return;
 338                         }
 339                 }
 340         }
 341         $conn->{state} = 'WC';
 342         unshift @{$conn->{cmd}}, $cmd;
 343 }
 344
 345 sub _timedout
 346 {
 347         my $conn = shift;
 348         dbg("connect $conn->{cnum}: timed out after $conn->{timeval} seconds") if isdbg('connect');
 349         $conn->disconnect;
 350 }
 351
 352 # handle callsign and connection type firtling
 353 sub _doclient
 354 {
 355         my $conn = shift;
 356         my $line = shift;
 357         my @f = split /\s+/, $line;
 358         my $call = uc $f[0] if $f[0];
 359         $conn->conns($call);
 360         $conn->{csort} = $f[1] if $f[1];
 361         $conn->{state} = 'C';
 362         &{$conn->{rproc}}($conn, "O$call|$conn->{csort}");
 363         delete $conn->{cmd};
 364         $conn->{timeout}->del if $conn->{timeout};
 365 }
 366
 367 sub _send_file
 368 {
 369         my $conn = shift;
 370         my $fn = shift;
 371
 372         if (-e $fn) {
 373                 my $f = new IO::File $fn;
 374                 if ($f) {
 375                         while (<$f>) {
 376                                 chomp;
 377                                 my $l = $_;
 378                                 dbg("connect $conn->{cnum}: $l") if isdbg('connll');
 379                                 $conn->send_raw($l . $conn->{lineend});
 380                         }
 381                         $f->close;
 382                 }
 383         }
 384 }