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 DXTimer;
  23
  24 use IO::File;
  25 use IO::Socket;
  26 use IPC::Open3;
  27
  28 use vars qw(@ISA $deftimeout);
  29
  30 @ISA = qw(Msg);
  31 $deftimeout = 60;
  32
  33 sub login
  34 {
  35         goto &main::login;        # save some writing, this was the default
  36 }
  37
  38 sub enqueue
  39 {
  40         my ($conn, $msg) = @_;
  41         unless ($msg =~ /^[ABZ]/) {
  42                 if ($msg =~ m{^E[-\w\/]+\|([01])} && $conn->{csort} eq 'telnet') {
  43                         $conn->{echo} = $1;
  44                         if ($1) {
  45 #                               $conn->send_raw("\xFF\xFC\x01");
  46                         } else {
  47 #                               $conn->send_raw("\xFF\xFB\x01");
  48                         }
  49                 } else {
  50                         $msg =~ s{^[-\w\/]+\|}{};
  51                         push (@{$conn->{outqueue}}, $msg . $conn->{lineend});
  52                 }
  53         }
  54 }
  55
  56 sub send_raw
  57 {
  58         my ($conn, $msg) = @_;
  59         dbg((ref $conn) . " connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
  60         $conn->SUPER::send_raw($msg);
  61 }
  62
  63 sub echo
  64 {
  65         my $conn = shift;
  66         $conn->{echo} = shift;
  67 }
  68
  69 sub _rcv
  70 {
  71     my $conn = shift; # $rcv_now complement of $flush
  72         my $msg = shift;
  73     my $sock = $conn->{sock};
  74     return unless defined($sock);
  75         return if $conn->{disconnecting};
  76
  77         if ($conn->{state} eq 'WL' && $conn->{sort} =~ /^I/ && $msg =~ /^PROXY/) {
  78                 my $echo = $conn->{echo};
  79                 $conn->{echo} = 0;
  80                 $conn->SUPER::_rcv($msg);
  81                 $conn->{echo} = $echo;
  82         } else {
  83                 $conn->SUPER::_rcv($msg);
  84         }
  85 }
  86
  87 sub dequeue
  88 {
  89         my $conn = shift;
  90         my $msg;
  91
  92         if ($conn->ax25 && exists $conn->{msg}) {
  93                 $conn->{msg} =~ s/\cM/\cJ/g;
  94         }
  95         if ($conn->{state} eq 'WC') {
  96                 if (exists $conn->{cmd}) {
  97                         if (@{$conn->{cmd}}) {
  98                                 dbg("connect $conn->{cnum}: $conn->{msg}") if isdbg('connect');
  99                                 $conn->_docmd($conn->{msg});
 100                         }
 101                 }
 102                 if ($conn->{state} eq 'WC' && exists $conn->{cmd} && @{$conn->{cmd}} == 0) {
 103                         $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 104                 }
 105         } elsif ($conn->{msg} =~ /\cJ/) {
 106                 my @lines =  $conn->{msg} =~ /([^\cM\cJ]*)\cM?\cJ/g;
 107                 if ($conn->{msg} =~ /\cJ$/) {
 108                         delete $conn->{msg};
 109                 } else {
 110                         $conn->{msg} =~ s/([^\cM\cJ]*)\cM?\cJ//g;
 111                 }
 112                 $conn->{linesin} += @lines;
 113                 $Msg::total_lines_in += @lines;
 114                 while (defined ($msg = shift @lines)) {
 115                         dbg("connect $conn->{cnum}: $msg") if $conn->{state} ne 'C' && isdbg('connect');
 116
 117                         $msg =~ s/\xff\xfa.*\xff\xf0|\xff[\xf0-\xfe].//g; # remove telnet options
 118 #                       $msg =~ s/[\x00-\x08\x0a-\x19\x1b-\x1f\x80-\x9f]/./g;         # immutable CSI sequence + control characters
 119
 120                         if ($conn->{state} eq 'C') {
 121                                 &{$conn->{rproc}}($conn, "I$conn->{call}|$msg");
 122                         } elsif ($conn->{state} eq 'WL' ) {
 123                                 $msg = uc $msg;
 124                                 if ($conn->{sort} =~ /^I/ && (my ($ip, $from) = $msg =~ /^PROXY TCP[46] ([\da-fA-F:\.]+) ([\da-fA-F:\.]+)/) ) {
 125                                         # SOMEONE appears to have affixed an HA Proxy to my connection
 126                                         $ip =~ s|^::ffff:||; # chop off leading pseudo IPV6 stuff on dual stack listeners
 127                                         $from =~ s|^::ffff:||;
 128                                         if ($from eq $conn->{peerhost}) {
 129                                                 dbg("ExtMsg: connect - PROXY IP change from '$conn->{peerhost}' -> '$ip'");
 130                                                 $conn->{peerhost} = $ip;
 131                                         } else {
 132                                                 dbg("ExtMsg: connect - PROXY someone ($from) is trying to spoof '$ip'");
 133                                                 $conn->send_now("Sorry $msg is an invalid callsign");
 134                                                 $conn->disconnect;
 135                                         }
 136                                 } elsif (is_callsign($msg)) {
 137                                         my $call = normalise_call($msg);
 138                                         if ($main::allowslashcall || $msg !~ m|/|) {
 139                                                 my $sort = $conn->{csort};
 140                                                 $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 141                                                 my $uref;
 142                                                 if ($main::passwdreq || ($uref = DXUser::get_current($call)) && $uref->passwd ) {
 143                                                         $conn->conns($call);
 144                                                         $conn->{state} = 'WP';
 145                                                         $conn->{decho} = $conn->{echo};
 146                                                         $conn->{echo} = 0;
 147                                                         $conn->send_raw('password: ');
 148                                                 } else {
 149                                                         $conn->to_connected($msg, 'A', $sort);
 150                                                 }
 151                                         } else {
 152                                                 $conn->send_now("Sorry $msg is an invalid callsign");
 153                                                 $conn->disconnect;
 154                                         }
 155                                 } else {
 156                                         $conn->send_now("Sorry $msg is an invalid callsign");
 157                                         $conn->disconnect;
 158                                 }
 159                         } elsif ($conn->{state} eq 'WP' ) {
 160                                 my $uref = DXUser::get_current($conn->{call});
 161                                 $msg =~ s/[\r\n]+$//;
 162                                 if ($uref && $msg eq $uref->passwd) {
 163                                         my $sort = $conn->{csort};
 164                                         $conn->{echo} = $conn->{decho};
 165                                         delete $conn->{decho};
 166                                         $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 167                                         $conn->{usedpasswd} = 1;
 168                                         $conn->to_connected($conn->{call}, 'A', $sort);
 169                                 } else {
 170                                         $conn->send_now("Sorry");
 171                                         $conn->disconnect;
 172                                 }
 173                         } elsif ($conn->{state} eq 'WC') {
 174                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
 175                                         $conn->_docmd($msg);
 176                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 177                                                 $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 178                                         }
 179                                 }
 180                         }
 181                 }
 182         }
 183 }
 184
 185 sub to_connected
 186 {
 187         my ($conn, $call, $dir, $sort) = @_;
 188         $conn->{state} = 'C';
 189         $conn->conns($call);
 190         delete $conn->{cmd};
 191         $conn->{timeout}->del if $conn->{timeout};
 192         delete $conn->{timeout};
 193         $conn->{csort} = $sort;
 194         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 195         $conn->_send_file(localdata("connected")) unless $conn->{outgoing};
 196 }
 197
 198 sub new_client {
 199
 200         my $server_conn = shift;
 201         my $client = shift;
 202         my $conn = $server_conn->SUPER::new_client($client);
 203         # send login prompt
 204         $conn->{state} = 'WL';
 205         $conn->_send_file(localdata("issue"));
 206         $conn->send_raw("login: ");
 207         $conn->_dotimeout(60);
 208 #       $conn->{echo} = 1;
 209 }
 210
 211 sub start_connect
 212 {
 213         my $call = shift;
 214         my $fn = shift;
 215         my $conn = ExtMsg->new(\&main::new_channel);
 216         $conn->{outgoing} = 1;
 217         $conn->conns($call);
 218
 219         my $f = new IO::File $fn;
 220         push @{$conn->{cmd}}, <$f>;
 221         $f->close;
 222         $conn->{state} = 'WC';
 223         $conn->_dotimeout($deftimeout);
 224         $conn->_docmd;
 225 }
 226
 227 sub _docmd
 228 {
 229         my $conn = shift;
 230         my $msg = shift;
 231         my $cmd;
 232
 233         while ($cmd = shift @{$conn->{cmd}}) {
 234                 chomp $cmd;
 235                 next if $cmd =~ /^\s*\#/o;
 236                 next if $cmd =~ /^\s*$/o;
 237                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 238                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 239                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 240                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 241                         unless ($conn->_doconnect($1, $2)) {
 242                                 $conn->disconnect;
 243                                 @{$conn->{cmd}} = [];    # empty any further commands
 244                                 last;
 245                         }
 246                 }
 247                 if ($cmd =~ /^\s*\'([^\']*)\'\s+\'([^\']*)\'/) {
 248                         $conn->_dochat($cmd, $msg, $1, $2);
 249                         last;
 250                 }
 251                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 252                         $conn->_doclient($1);
 253                         last;
 254                 }
 255                 last if $conn->{state} eq 'E';
 256         }
 257 }
 258
 259 sub _doconnect
 260 {
 261         my ($conn, $sort, $line) = @_;
 262         my $r;
 263
 264         $sort = lc $sort;
 265         dbg("CONNECT $conn->{cnum} sort: $sort command: $line") if isdbg('connect');
 266         if ($sort eq 'telnet') {
 267                 # this is a straight network connect
 268                 my ($host, $port) = split /\s+/, $line;
 269                 $port = 23 if !$port;
 270                 $r = $conn->connect($host, $port);
 271                 if ($r) {
 272                         dbg("Connected $conn->{cnum} to $host $port") if isdbg('connect');
 273                 } else {
 274                         dbg("***Connect $conn->{cnum} Failed to $host $port $!") if isdbg('connect');
 275                 }
 276         } elsif ($sort eq 'agw') {
 277                 # turn it into an AGW object
 278                 bless $conn, 'AGWMsg';
 279                 $r = $conn->connect($line);
 280         } elsif ($sort eq 'bpq') {
 281                 # turn it into an BPQ object
 282                 bless $conn, 'BPQMsg';
 283                 $r = $conn->connect($line);
 284         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 285                 $r = $conn->start_program($line, $sort);
 286         } else {
 287                 dbg("invalid type of connection ($sort)");
 288         }
 289         $conn->disconnect unless $r;
 290         return $r;
 291 }
 292
 293 sub _doabort
 294 {
 295         my $conn = shift;
 296         my $string = shift;
 297         dbg("connect $conn->{cnum}: abort $string") if isdbg('connect');
 298         $conn->{abort} = $string;
 299 }
 300
 301 sub _dotimeout
 302 {
 303         my $conn = shift;
 304         my $val = shift;
 305         dbg("connect $conn->{cnum}: timeout set to $val") if isdbg('connect');
 306         $conn->{timeout}->del if $conn->{timeout};
 307         $conn->{timeval} = $val;
 308         $conn->{timeout} = DXTimer->new($val, sub{ &_timedout($conn) });
 309 }
 310
 311 sub _dolineend
 312 {
 313         my $conn = shift;
 314         my $val = shift;
 315         dbg("connect $conn->{cnum}: lineend set to $val ") if isdbg('connect');
 316         $val =~ s/\\r/\r/g;
 317         $val =~ s/\\n/\n/g;
 318         $conn->{lineend} = $val;
 319 }
 320
 321 sub _dochat
 322 {
 323         my $conn = shift;
 324         my $cmd = shift;
 325         my $line = shift;
 326         my $expect = shift;
 327         my $send = shift;
 328
 329         if ($line) {
 330                 if ($expect) {
 331                         dbg("connect $conn->{cnum}: expecting: \"$expect\" received: \"$line\"") if isdbg('connect');
 332                         if ($conn->{abort} && $line =~ /$conn->{abort}/i) {
 333                                 dbg("connect $conn->{cnum}: aborted on /$conn->{abort}/") if isdbg('connect');
 334                                 $conn->disconnect;
 335                                 delete $conn->{cmd};
 336                                 return;
 337                         }
 338                         if ($line =~ /\Q$expect/i) {
 339                                 if (length $send) {
 340                                         dbg("connect $conn->{cnum}: got: \"$expect\" sending: \"$send\"") if isdbg('connect');
 341                                         $conn->send_later("D$conn->{call}|$send");
 342                                 }
 343                                 delete $conn->{msg}; # get rid any input if a match
 344                                 return;
 345                         }
 346                 }
 347         }
 348         $conn->{state} = 'WC';
 349         unshift @{$conn->{cmd}}, $cmd;
 350 }
 351
 352 sub _timedout
 353 {
 354         my $conn = shift;
 355         dbg("connect $conn->{cnum}: timed out after $conn->{timeval} seconds") if isdbg('connect');
 356         $conn->disconnect;
 357 }
 358
 359 # handle callsign and connection type firtling
 360 sub _doclient
 361 {
 362         my $conn = shift;
 363         my $line = shift;
 364         my @f = split /\s+/, $line;
 365         my $call = uc $f[0] if $f[0];
 366         $conn->conns($call);
 367         $conn->{csort} = $f[1] if $f[1];
 368         $conn->{state} = 'C';
 369         eval {$conn->{peerhost} = $conn->{sock}->handle->peerhost} unless $conn->ax25;
 370         &{$conn->{rproc}}($conn, "O$call|$conn->{csort}");
 371         delete $conn->{cmd};
 372         $conn->{timeout}->del if $conn->{timeout};
 373 }
 374
 375 sub _send_file
 376 {
 377         my $conn = shift;
 378         my $fn = shift;
 379
 380         if (-e $fn) {
 381                 my $f = new IO::File $fn;
 382                 if ($f) {
 383                         while (<$f>) {
 384                                 chomp;
 385                                 my $l = $_;
 386                                 dbg("connect $conn->{cnum}: $l") if isdbg('connll');
 387                                 $conn->send_raw($l . $conn->{lineend});
 388                         }
 389                         $f->close;
 390                 }
 391         }
 392 }