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