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                 $conn->{linesin} += @lines;
 111                 $Msg::total_lines_in += @lines;
 112                 while (defined ($msg = shift @lines)) {
 113                         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
 114
 115                         $msg =~ s/\xff\xfa.*\xff\xf0|\xff[\xf0-\xfe].//g; # remove telnet options
 116 #                       $msg =~ s/[\x00-\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g;         # immutable CSI sequence + control characters
 117
 118                         if ($conn->{state} eq 'C') {
 119                                 &{$conn->{rproc}}($conn, "I$conn->{call}|$msg");
 120                         } elsif ($conn->{state} eq 'WL' ) {
 121                                 $msg = uc $msg;
 122                                 if ($conn->{sort} =~ /^I/ && (my ($ip, $from) = $msg =~ /^PROXY TCP[46] ([\da-fA-F:\.]+) ([\da-fA-F:\.]+)/) ) {
 123                                         # SOMEONE appears to have affixed an HA Proxy to my connection
 124                                         $ip =~ s|^::ffff:||; # chop off leading pseudo IPV6 stuff on dual stack listeners
 125                                         $from =~ s|^::ffff:||;
 126                                         if ($from eq $conn->{peerhost}) {
 127                                                 dbg("ExtMsg: connect - PROXY IP change from '$conn->{peerhost}' -> '$ip'");
 128                                                 $conn->{peerhost} = $ip;
 129                                         } else {
 130                                                 dbg("ExtMsg: connect - PROXY someone ($from) is trying to spoof '$ip'");
 131                                                 $conn->send_now("Sorry $msg is an invalid callsign");
 132                                                 $conn->disconnect;
 133                                         }
 134                                 } elsif (is_callsign($msg)) {
 135                                         if ($main::allowslashcall || $msg !~ m|/|) {
 136                                                 my $sort = $conn->{csort};
 137                                                 $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 138                                                 my $uref;
 139                                                 if ($main::passwdreq || ($uref = DXUser::get_current($msg)) && $uref->passwd ) {
 140                                                         $conn->conns($msg);
 141                                                         $conn->{state} = 'WP';
 142                                                         $conn->{decho} = $conn->{echo};
 143                                                         $conn->{echo} = 0;
 144                                                         $conn->send_raw('password: ');
 145                                                 } else {
 146                                                         $conn->to_connected($msg, 'A', $sort);
 147                                                 }
 148                                         } else {
 149                                                 $conn->send_now("Sorry $msg is an invalid callsign");
 150                                                 $conn->disconnect;
 151                                         }
 152                                 } else {
 153                                         $conn->send_now("Sorry $msg is an invalid callsign");
 154                                         $conn->disconnect;
 155                                 }
 156                         } elsif ($conn->{state} eq 'WP' ) {
 157                                 my $uref = DXUser::get_current($conn->{call});
 158                                 $msg =~ s/[\r\n]+$//;
 159                                 if ($uref && $msg eq $uref->passwd) {
 160                                         my $sort = $conn->{csort};
 161                                         $conn->{echo} = $conn->{decho};
 162                                         delete $conn->{decho};
 163                                         $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 164                                         $conn->{usedpasswd} = 1;
 165                                         $conn->to_connected($conn->{call}, 'A', $sort);
 166                                 } else {
 167                                         $conn->send_now("Sorry");
 168                                         $conn->disconnect;
 169                                 }
 170                         } elsif ($conn->{state} eq 'WC') {
 171                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
 172                                         $conn->_docmd($msg);
 173                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 174                                                 $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 175                                         }
 176                                 }
 177                         }
 178                 }
 179         }
 180 }
 181
 182 sub to_connected
 183 {
 184         my ($conn, $call, $dir, $sort) = @_;
 185         $conn->{state} = 'C';
 186         $conn->conns($call);
 187         delete $conn->{cmd};
 188         $conn->{timeout}->del if $conn->{timeout};
 189         delete $conn->{timeout};
 190         $conn->{csort} = $sort;
 191         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 192         $conn->_send_file(localdata("connected")) unless $conn->{outgoing};
 193 }
 194
 195 sub new_client {
 196
 197         my $server_conn = shift;
 198         my $client = shift;
 199         my $conn = $server_conn->SUPER::new_client($client);
 200         # send login prompt
 201         $conn->{state} = 'WL';
 202         $conn->_send_file(localdata("issue"));
 203         $conn->send_raw("login: ");
 204         $conn->_dotimeout(60);
 205 #       $conn->{echo} = 1;
 206 }
 207
 208 sub start_connect
 209 {
 210         my $call = shift;
 211         my $fn = shift;
 212         my $conn = ExtMsg->new(\&main::new_channel);
 213         $conn->{outgoing} = 1;
 214         $conn->conns($call);
 215
 216         my $f = new IO::File $fn;
 217         push @{$conn->{cmd}}, <$f>;
 218         $f->close;
 219         $conn->{state} = 'WC';
 220         $conn->_dotimeout($deftimeout);
 221         $conn->_docmd;
 222 }
 223
 224 sub _docmd
 225 {
 226         my $conn = shift;
 227         my $msg = shift;
 228         my $cmd;
 229
 230         while ($cmd = shift @{$conn->{cmd}}) {
 231                 chomp $cmd;
 232                 next if $cmd =~ /^\s*\#/o;
 233                 next if $cmd =~ /^\s*$/o;
 234                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 235                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 236                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 237                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 238                         unless ($conn->_doconnect($1, $2)) {
 239                                 $conn->disconnect;
 240                                 @{$conn->{cmd}} = [];    # empty any further commands
 241                                 last;
 242                         }
 243                 }
 244                 if ($cmd =~ /^\s*\'([^\']*)\'\s+\'([^\']*)\'/) {
 245                         $conn->_dochat($cmd, $msg, $1, $2);
 246                         last;
 247                 }
 248                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 249                         $conn->_doclient($1);
 250                         last;
 251                 }
 252                 last if $conn->{state} eq 'E';
 253         }
 254 }
 255
 256 sub _doconnect
 257 {
 258         my ($conn, $sort, $line) = @_;
 259         my $r;
 260
 261         $sort = lc $sort;
 262         dbg("CONNECT $conn->{cnum} sort: $sort command: $line") if isdbg('connect');
 263         if ($sort eq 'telnet') {
 264                 # this is a straight network connect
 265                 my ($host, $port) = split /\s+/, $line;
 266                 $port = 23 if !$port;
 267                 $r = $conn->connect($host, $port);
 268                 if ($r) {
 269                         dbg("Connected $conn->{cnum} to $host $port") if isdbg('connect');
 270                 } else {
 271                         dbg("***Connect $conn->{cnum} Failed to $host $port $!") if isdbg('connect');
 272                 }
 273         } elsif ($sort eq 'agw') {
 274                 # turn it into an AGW object
 275                 bless $conn, 'AGWMsg';
 276                 $r = $conn->connect($line);
 277         } elsif ($sort eq 'bpq') {
 278                 # turn it into an BPQ object
 279                 bless $conn, 'BPQMsg';
 280                 $r = $conn->connect($line);
 281         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 282                 $r = $conn->start_program($line, $sort);
 283         } else {
 284                 dbg("invalid type of connection ($sort)");
 285         }
 286         $conn->disconnect unless $r;
 287         return $r;
 288 }
 289
 290 sub _doabort
 291 {
 292         my $conn = shift;
 293         my $string = shift;
 294         dbg("connect $conn->{cnum}: abort $string") if isdbg('connect');
 295         $conn->{abort} = $string;
 296 }
 297
 298 sub _dotimeout
 299 {
 300         my $conn = shift;
 301         my $val = shift;
 302         dbg("connect $conn->{cnum}: timeout set to $val") if isdbg('connect');
 303         $conn->{timeout}->del if $conn->{timeout};
 304         $conn->{timeval} = $val;
 305         $conn->{timeout} = Timer->new($val, sub{ &_timedout($conn) });
 306 }
 307
 308 sub _dolineend
 309 {
 310         my $conn = shift;
 311         my $val = shift;
 312         dbg("connect $conn->{cnum}: lineend set to $val ") if isdbg('connect');
 313         $val =~ s/\\r/\r/g;
 314         $val =~ s/\\n/\n/g;
 315         $conn->{lineend} = $val;
 316 }
 317
 318 sub _dochat
 319 {
 320         my $conn = shift;
 321         my $cmd = shift;
 322         my $line = shift;
 323         my $expect = shift;
 324         my $send = shift;
 325
 326         if ($line) {
 327                 if ($expect) {
 328                         dbg("connect $conn->{cnum}: expecting: \"$expect\" received: \"$line\"") if isdbg('connect');
 329                         if ($conn->{abort} && $line =~ /$conn->{abort}/i) {
 330                                 dbg("connect $conn->{cnum}: aborted on /$conn->{abort}/") if isdbg('connect');
 331                                 $conn->disconnect;
 332                                 delete $conn->{cmd};
 333                                 return;
 334                         }
 335                         if ($line =~ /\Q$expect/i) {
 336                                 if (length $send) {
 337                                         dbg("connect $conn->{cnum}: got: \"$expect\" sending: \"$send\"") if isdbg('connect');
 338                                         $conn->send_later("D$conn->{call}|$send");
 339                                 }
 340                                 delete $conn->{msg}; # get rid any input if a match
 341                                 return;
 342                         }
 343                 }
 344         }
 345         $conn->{state} = 'WC';
 346         unshift @{$conn->{cmd}}, $cmd;
 347 }
 348
 349 sub _timedout
 350 {
 351         my $conn = shift;
 352         dbg("connect $conn->{cnum}: timed out after $conn->{timeval} seconds") if isdbg('connect');
 353         $conn->disconnect;
 354 }
 355
 356 # handle callsign and connection type firtling
 357 sub _doclient
 358 {
 359         my $conn = shift;
 360         my $line = shift;
 361         my @f = split /\s+/, $line;
 362         my $call = uc $f[0] if $f[0];
 363         $conn->conns($call);
 364         $conn->{csort} = $f[1] if $f[1];
 365         $conn->{state} = 'C';
 366         eval {$conn->{peerhost} = $conn->{sock}->handle->peerhost} unless $conn->ax25;
 367         &{$conn->{rproc}}($conn, "O$call|$conn->{csort}");
 368         delete $conn->{cmd};
 369         $conn->{timeout}->del if $conn->{timeout};
 370 }
 371
 372 sub _send_file
 373 {
 374         my $conn = shift;
 375         my $fn = shift;
 376
 377         if (-e $fn) {
 378                 my $f = new IO::File $fn;
 379                 if ($f) {
 380                         while (<$f>) {
 381                                 chomp;
 382                                 my $l = $_;
 383                                 dbg("connect $conn->{cnum}: $l") if isdbg('connll');
 384                                 $conn->send_raw($l . $conn->{lineend});
 385                         }
 386                         $f->close;
 387                 }
 388         }
 389 }