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 #
   9 # Copyright (c) 2001 - Dirk Koopman G1TLH
  10 #
  11 #       Modified Jan 2006 by John Wiseman G8BPQ to support connections to BPQ32 node,
  12 #               and fix pattern matching on 'chat' abort handling
  13 #
  14
  15 package ExtMsg;
  16
  17 use strict;
  18 use Msg;
  19 use DXVars;
  20 use DXUtil;
  21 use DXDebug;
  22 use IO::File;
  23 use IO::Socket;
  24 use IPC::Open3;
  25
  26 use vars qw(@ISA $deftimeout);
  27
  28 @ISA = qw(Msg);
  29 $deftimeout = 60;
  30
  31 sub login
  32 {
  33         goto &main::login;        # save some writing, this was the default
  34 }
  35
  36 sub enqueue
  37 {
  38         my ($conn, $msg) = @_;
  39         unless ($msg =~ /^[ABZ]/) {
  40                 if ($msg =~ m{^E[-\w\/]+\|([01])} && $conn->{csort} eq 'telnet') {
  41                         $conn->{echo} = $1;
  42                         if ($1) {
  43 #                               $conn->send_raw("\xFF\xFC\x01");
  44                         } else {
  45 #                               $conn->send_raw("\xFF\xFB\x01");
  46                         }
  47                 } else {
  48                         $msg =~ s{^[-\w\/]+\|}{};
  49                         push (@{$conn->{outqueue}}, $msg . $conn->{lineend});
  50                 }
  51         }
  52 }
  53
  54 sub send_raw
  55 {
  56         my ($conn, $msg) = @_;
  57         dbg((ref $conn) . " connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
  58         $conn->SUPER::send_raw($msg);
  59 }
  60
  61 sub echo
  62 {
  63         my $conn = shift;
  64         $conn->{echo} = shift;
  65 }
  66
  67 sub _rcv
  68 {
  69     my $conn = shift; # $rcv_now complement of $flush
  70         my $msg = shift;
  71     my $sock = $conn->{sock};
  72     return unless defined($sock);
  73         return if $conn->{disconnecting};
  74
  75         if ($conn->{state} eq 'WL' && $conn->{sort} =~ /^I/ && $msg =~ /^PROXY/) {
  76                 my $echo = $conn->{echo};
  77                 $conn->{echo} = 0;
  78                 $conn->SUPER::_rcv($msg);
  79                 $conn->{echo} = $echo;
  80         } else {
  81                 $conn->SUPER::_rcv($msg);
  82         }
  83 }
  84
  85 sub dequeue
  86 {
  87         my $conn = shift;
  88         my $msg;
  89
  90         if ($conn->ax25 && exists $conn->{msg}) {
  91                 $conn->{msg} =~ s/\cM/\cJ/g;
  92         }
  93         if ($conn->{state} eq 'WC') {
  94                 if (exists $conn->{cmd}) {
  95                         if (@{$conn->{cmd}}) {
  96                                 dbg("connect $conn->{cnum}: $conn->{msg}") if isdbg('connect');
  97                                 $conn->_docmd($conn->{msg});
  98                         }
  99                 }
 100                 if ($conn->{state} eq 'WC' && exists $conn->{cmd} && @{$conn->{cmd}} == 0) {
 101                         $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 102                 }
 103         } elsif ($conn->{msg} =~ /\cJ/) {
 104                 my @lines =  $conn->{msg} =~ /([^\cM\cJ]*)\cM?\cJ/g;
 105                 if ($conn->{msg} =~ /\cJ$/) {
 106                         delete $conn->{msg};
 107                 } else {
 108                         $conn->{msg} =~ s/([^\cM\cJ]*)\cM?\cJ//g;
 109                 }
 110                 while (defined ($msg = shift @lines)) {
 111                         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
 112
 113                         $msg =~ s/\xff\xfa.*\xff\xf0|\xff[\xf0-\xfe].//g; # remove telnet options
 114 #                       $msg =~ s/[\x00-\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g;         # immutable CSI sequence + control characters
 115
 116                         if ($conn->{state} eq 'C') {
 117                                 &{$conn->{rproc}}($conn, "I$conn->{call}|$msg");
 118                         } elsif ($conn->{state} eq 'WL' ) {
 119                                 $msg = uc $msg;
 120                                 if ($conn->{sort} =~ /^I/ && (my ($ip, $from) = $msg =~ /^PROXY TCP[46] ([\da-fA-F:\.]+) ([\da-fA-F:\.]+)/) ) {
 121                                         # SOMEONE appears to have affixed an HA Proxy to my connection
 122                                         $ip =~ s|^::ffff:||; # chop off leading pseudo IPV6 stuff on dual stack listeners
 123                                         $from =~ s|^::ffff:||;
 124                                         if ($from eq $conn->{peerhost}) {
 125                                                 dbg("ExtMsg: connect - PROXY IP change from '$conn->{peerhost}' -> '$ip'");
 126                                                 $conn->{peerhost} = $ip;
 127                                         } else {
 128                                                 dbg("ExtMsg: connect - PROXY someone ($from) is trying to spoof '$ip'");
 129                                                 $conn->send_now("Sorry $msg is an invalid callsign");
 130                                                 $conn->disconnect;
 131                                         }
 132                                 } elsif (is_callsign($msg)) {
 133                                         if ($main::allowslashcall || $msg !~ m|/|) {
 134                                                 my $sort = $conn->{csort};
 135                                                 $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 136                                                 my $uref;
 137                                                 if ($main::passwdreq || ($uref = DXUser::get_current($msg)) && $uref->passwd ) {
 138                                                         $conn->conns($msg);
 139                                                         $conn->{state} = 'WP';
 140                                                         $conn->{decho} = $conn->{echo};
 141                                                         $conn->{echo} = 0;
 142                                                         $conn->send_raw('password: ');
 143                                                 } else {
 144                                                         $conn->to_connected($msg, 'A', $sort);
 145                                                 }
 146                                         } else {
 147                                                 $conn->send_now("Sorry $msg is an invalid callsign");
 148                                                 $conn->disconnect;
 149                                         }
 150                                 } else {
 151                                         $conn->send_now("Sorry $msg is an invalid callsign");
 152                                         $conn->disconnect;
 153                                 }
 154                         } elsif ($conn->{state} eq 'WP' ) {
 155                                 my $uref = DXUser::get_current($conn->{call});
 156                                 $msg =~ s/[\r\n]+$//;
 157                                 if ($uref && $msg eq $uref->passwd) {
 158                                         my $sort = $conn->{csort};
 159                                         $conn->{echo} = $conn->{decho};
 160                                         delete $conn->{decho};
 161                                         $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 162                                         $conn->{usedpasswd} = 1;
 163                                         $conn->to_connected($conn->{call}, 'A', $sort);
 164                                 } else {
 165                                         $conn->send_now("Sorry");
 166                                         $conn->disconnect;
 167                                 }
 168                         } elsif ($conn->{state} eq 'WC') {
 169                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
 170                                         $conn->_docmd($msg);
 171                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 172                                                 $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 173                                         }
 174                                 }
 175                         }
 176                 }
 177         }
 178 }
 179
 180 sub to_connected
 181 {
 182         my ($conn, $call, $dir, $sort) = @_;
 183         $conn->{state} = 'C';
 184         $conn->conns($call);
 185         delete $conn->{cmd};
 186         $conn->{timeout}->del if $conn->{timeout};
 187         delete $conn->{timeout};
 188         $conn->{csort} = $sort;
 189         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 190         $conn->_send_file(localdata("connected")) unless $conn->{outgoing};
 191 }
 192
 193 sub new_client {
 194
 195         my $server_conn = shift;
 196         my $client = shift;
 197         my $conn = $server_conn->SUPER::new_client($client);
 198         # send login prompt
 199         $conn->{state} = 'WL';
 200         $conn->_send_file(localdata("issue"));
 201         $conn->send_raw("login: ");
 202         $conn->_dotimeout(60);
 203 #       $conn->{echo} = 1;
 204 }
 205
 206 sub start_connect
 207 {
 208         my $call = shift;
 209         my $fn = shift;
 210         my $conn = ExtMsg->new(\&main::new_channel);
 211         $conn->{outgoing} = 1;
 212         $conn->conns($call);
 213
 214         my $f = new IO::File $fn;
 215         push @{$conn->{cmd}}, <$f>;
 216         $f->close;
 217         $conn->{state} = 'WC';
 218         $conn->_dotimeout($deftimeout);
 219         $conn->_docmd;
 220 }
 221
 222 sub _docmd
 223 {
 224         my $conn = shift;
 225         my $msg = shift;
 226         my $cmd;
 227
 228         while ($cmd = shift @{$conn->{cmd}}) {
 229                 chomp $cmd;
 230                 next if $cmd =~ /^\s*\#/o;
 231                 next if $cmd =~ /^\s*$/o;
 232                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 233                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 234                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 235                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 236                         unless ($conn->_doconnect($1, $2)) {
 237                                 $conn->disconnect;
 238                                 @{$conn->{cmd}} = [];    # empty any further commands
 239                                 last;
 240                         }
 241                 }
 242                 if ($cmd =~ /^\s*\'([^\']*)\'\s+\'([^\']*)\'/) {
 243                         $conn->_dochat($cmd, $msg, $1, $2);
 244                         last;
 245                 }
 246                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 247                         $conn->_doclient($1);
 248                         last;
 249                 }
 250                 last if $conn->{state} eq 'E';
 251         }
 252 }
 253
 254 sub _doconnect
 255 {
 256         my ($conn, $sort, $line) = @_;
 257         my $r;
 258
 259         $sort = lc $sort;
 260         dbg("CONNECT $conn->{cnum} sort: $sort command: $line") if isdbg('connect');
 261         if ($sort eq 'telnet') {
 262                 # this is a straight network connect
 263                 my ($host, $port) = split /\s+/, $line;
 264                 $port = 23 if !$port;
 265                 $r = $conn->connect($host, $port);
 266                 if ($r) {
 267                         dbg("Connected $conn->{cnum} to $host $port") if isdbg('connect');
 268                 } else {
 269                         dbg("***Connect $conn->{cnum} Failed to $host $port $!") if isdbg('connect');
 270                 }
 271         } elsif ($sort eq 'agw') {
 272                 # turn it into an AGW object
 273                 bless $conn, 'AGWMsg';
 274                 $r = $conn->connect($line);
 275         } elsif ($sort eq 'bpq') {
 276                 # turn it into an BPQ object
 277                 bless $conn, 'BPQMsg';
 278                 $r = $conn->connect($line);
 279         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 280                 $r = $conn->start_program($line, $sort);
 281         } else {
 282                 dbg("invalid type of connection ($sort)");
 283         }
 284         $conn->disconnect unless $r;
 285         return $r;
 286 }
 287
 288 sub _doabort
 289 {
 290         my $conn = shift;
 291         my $string = shift;
 292         dbg("connect $conn->{cnum}: abort $string") if isdbg('connect');
 293         $conn->{abort} = $string;
 294 }
 295
 296 sub _dotimeout
 297 {
 298         my $conn = shift;
 299         my $val = shift;
 300         dbg("connect $conn->{cnum}: timeout set to $val") if isdbg('connect');
 301         $conn->{timeout}->del if $conn->{timeout};
 302         $conn->{timeval} = $val;
 303         $conn->{timeout} = Timer->new($val, sub{ &_timedout($conn) });
 304 }
 305
 306 sub _dolineend
 307 {
 308         my $conn = shift;
 309         my $val = shift;
 310         dbg("connect $conn->{cnum}: lineend set to $val ") if isdbg('connect');
 311         $val =~ s/\\r/\r/g;
 312         $val =~ s/\\n/\n/g;
 313         $conn->{lineend} = $val;
 314 }
 315
 316 sub _dochat
 317 {
 318         my $conn = shift;
 319         my $cmd = shift;
 320         my $line = shift;
 321         my $expect = shift;
 322         my $send = shift;
 323
 324         if ($line) {
 325                 if ($expect) {
 326                         dbg("connect $conn->{cnum}: expecting: \"$expect\" received: \"$line\"") if isdbg('connect');
 327                         if ($conn->{abort} && $line =~ /$conn->{abort}/i) {
 328                                 dbg("connect $conn->{cnum}: aborted on /$conn->{abort}/") if isdbg('connect');
 329                                 $conn->disconnect;
 330                                 delete $conn->{cmd};
 331                                 return;
 332                         }
 333                         if ($line =~ /\Q$expect/i) {
 334                                 if (length $send) {
 335                                         dbg("connect $conn->{cnum}: got: \"$expect\" sending: \"$send\"") if isdbg('connect');
 336                                         $conn->send_later("D$conn->{call}|$send");
 337                                 }
 338                                 delete $conn->{msg}; # get rid any input if a match
 339                                 return;
 340                         }
 341                 }
 342         }
 343         $conn->{state} = 'WC';
 344         unshift @{$conn->{cmd}}, $cmd;
 345 }
 346
 347 sub _timedout
 348 {
 349         my $conn = shift;
 350         dbg("connect $conn->{cnum}: timed out after $conn->{timeval} seconds") if isdbg('connect');
 351         $conn->disconnect;
 352 }
 353
 354 # handle callsign and connection type firtling
 355 sub _doclient
 356 {
 357         my $conn = shift;
 358         my $line = shift;
 359         my @f = split /\s+/, $line;
 360         my $call = uc $f[0] if $f[0];
 361         $conn->conns($call);
 362         $conn->{csort} = $f[1] if $f[1];
 363         $conn->{state} = 'C';
 364         eval {$conn->{peerhost} = $conn->{sock}->handle->peerhost} unless $conn->ax25;
 365         &{$conn->{rproc}}($conn, "O$call|$conn->{csort}");
 366         delete $conn->{cmd};
 367         $conn->{timeout}->del if $conn->{timeout};
 368 }
 369
 370 sub _send_file
 371 {
 372         my $conn = shift;
 373         my $fn = shift;
 374
 375         if (-e $fn) {
 376                 my $f = new IO::File $fn;
 377                 if ($f) {
 378                         while (<$f>) {
 379                                 chomp;
 380                                 my $l = $_;
 381                                 dbg("connect $conn->{cnum}: $l") if isdbg('connll');
 382                                 $conn->send_raw($l . $conn->{lineend});
 383                         }
 384                         $f->close;
 385                 }
 386         }
 387 }