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                                         if ($main::allowslashcall || $msg !~ m|/|) {
 138                                                 my $sort = $conn->{csort};
 139                                                 $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 140                                                 my $uref;
 141                                                 if ($main::passwdreq || ($uref = DXUser::get_current($msg)) && $uref->passwd ) {
 142                                                         $conn->conns($msg);
 143                                                         $conn->{state} = 'WP';
 144                                                         $conn->{decho} = $conn->{echo};
 145                                                         $conn->{echo} = 0;
 146                                                         $conn->send_raw('password: ');
 147                                                 } else {
 148                                                         $conn->to_connected($msg, 'A', $sort);
 149                                                 }
 150                                         } else {
 151                                                 $conn->send_now("Sorry $msg is an invalid callsign");
 152                                                 $conn->disconnect;
 153                                         }
 154                                 } else {
 155                                         $conn->send_now("Sorry $msg is an invalid callsign");
 156                                         $conn->disconnect;
 157                                 }
 158                         } elsif ($conn->{state} eq 'WP' ) {
 159                                 my $uref = DXUser::get_current($conn->{call});
 160                                 $msg =~ s/[\r\n]+$//;
 161                                 if ($uref && $msg eq $uref->passwd) {
 162                                         my $sort = $conn->{csort};
 163                                         $conn->{echo} = $conn->{decho};
 164                                         delete $conn->{decho};
 165                                         $sort = 'local' if $conn->{peerhost} =~ /127\.\d+\.\d+\.\d+$/ || $conn->{peerhost} eq '::1';
 166                                         $conn->{usedpasswd} = 1;
 167                                         $conn->to_connected($conn->{call}, 'A', $sort);
 168                                 } else {
 169                                         $conn->send_now("Sorry");
 170                                         $conn->disconnect;
 171                                 }
 172                         } elsif ($conn->{state} eq 'WC') {
 173                                 if (exists $conn->{cmd} && @{$conn->{cmd}}) {
 174                                         $conn->_docmd($msg);
 175                                         if ($conn->{state} eq 'WC' && exists $conn->{cmd} &&  @{$conn->{cmd}} == 0) {
 176                                                 $conn->to_connected($conn->{call}, 'O', $conn->{csort});
 177                                         }
 178                                 }
 179                         }
 180                 }
 181         }
 182 }
 183
 184 sub to_connected
 185 {
 186         my ($conn, $call, $dir, $sort) = @_;
 187         $conn->{state} = 'C';
 188         $conn->conns($call);
 189         delete $conn->{cmd};
 190         $conn->{timeout}->del if $conn->{timeout};
 191         delete $conn->{timeout};
 192         $conn->{csort} = $sort;
 193         &{$conn->{rproc}}($conn, "$dir$call|$sort");
 194         $conn->_send_file(localdata("connected")) unless $conn->{outgoing};
 195 }
 196
 197 sub new_client {
 198
 199         my $server_conn = shift;
 200         my $client = shift;
 201         my $conn = $server_conn->SUPER::new_client($client);
 202         # send login prompt
 203         $conn->{state} = 'WL';
 204         $conn->_send_file(localdata("issue"));
 205         $conn->send_raw("login: ");
 206         $conn->_dotimeout(60);
 207 #       $conn->{echo} = 1;
 208 }
 209
 210 sub start_connect
 211 {
 212         my $call = shift;
 213         my $fn = shift;
 214         my $conn = ExtMsg->new(\&main::new_channel);
 215         $conn->{outgoing} = 1;
 216         $conn->conns($call);
 217
 218         my $f = new IO::File $fn;
 219         push @{$conn->{cmd}}, <$f>;
 220         $f->close;
 221         $conn->{state} = 'WC';
 222         $conn->_dotimeout($deftimeout);
 223         $conn->_docmd;
 224 }
 225
 226 sub _docmd
 227 {
 228         my $conn = shift;
 229         my $msg = shift;
 230         my $cmd;
 231
 232         while ($cmd = shift @{$conn->{cmd}}) {
 233                 chomp $cmd;
 234                 next if $cmd =~ /^\s*\#/o;
 235                 next if $cmd =~ /^\s*$/o;
 236                 $conn->_doabort($1) if $cmd =~ /^\s*a\w*\s+(.*)/i;
 237                 $conn->_dotimeout($1) if $cmd =~ /^\s*t\w*\s+(\d+)/i;
 238                 $conn->_dolineend($1) if $cmd =~ /^\s*[Ll]\w*\s+\'((?:\\[rn])+)\'/i;
 239                 if ($cmd =~ /^\s*co\w*\s+(\w+)\s+(.*)$/i) {
 240                         unless ($conn->_doconnect($1, $2)) {
 241                                 $conn->disconnect;
 242                                 @{$conn->{cmd}} = [];    # empty any further commands
 243                                 last;
 244                         }
 245                 }
 246                 if ($cmd =~ /^\s*\'([^\']*)\'\s+\'([^\']*)\'/) {
 247                         $conn->_dochat($cmd, $msg, $1, $2);
 248                         last;
 249                 }
 250                 if ($cmd =~ /^\s*cl\w+\s+(.*)/i) {
 251                         $conn->_doclient($1);
 252                         last;
 253                 }
 254                 last if $conn->{state} eq 'E';
 255         }
 256 }
 257
 258 sub _doconnect
 259 {
 260         my ($conn, $sort, $line) = @_;
 261         my $r;
 262
 263         $sort = lc $sort;
 264         dbg("CONNECT $conn->{cnum} sort: $sort command: $line") if isdbg('connect');
 265         if ($sort eq 'telnet') {
 266                 # this is a straight network connect
 267                 my ($host, $port) = split /\s+/, $line;
 268                 $port = 23 if !$port;
 269                 $r = $conn->connect($host, $port);
 270                 if ($r) {
 271                         dbg("Connected $conn->{cnum} to $host $port") if isdbg('connect');
 272                 } else {
 273                         dbg("***Connect $conn->{cnum} Failed to $host $port $!") if isdbg('connect');
 274                 }
 275         } elsif ($sort eq 'agw') {
 276                 # turn it into an AGW object
 277                 bless $conn, 'AGWMsg';
 278                 $r = $conn->connect($line);
 279         } elsif ($sort eq 'bpq') {
 280                 # turn it into an BPQ object
 281                 bless $conn, 'BPQMsg';
 282                 $r = $conn->connect($line);
 283         } elsif ($sort eq 'ax25' || $sort eq 'prog') {
 284                 $r = $conn->start_program($line, $sort);
 285         } else {
 286                 dbg("invalid type of connection ($sort)");
 287         }
 288         $conn->disconnect unless $r;
 289         return $r;
 290 }
 291
 292 sub _doabort
 293 {
 294         my $conn = shift;
 295         my $string = shift;
 296         dbg("connect $conn->{cnum}: abort $string") if isdbg('connect');
 297         $conn->{abort} = $string;
 298 }
 299
 300 sub _dotimeout
 301 {
 302         my $conn = shift;
 303         my $val = shift;
 304         dbg("connect $conn->{cnum}: timeout set to $val") if isdbg('connect');
 305         $conn->{timeout}->del if $conn->{timeout};
 306         $conn->{timeval} = $val;
 307         $conn->{timeout} = DXTimer->new($val, sub{ &_timedout($conn) });
 308 }
 309
 310 sub _dolineend
 311 {
 312         my $conn = shift;
 313         my $val = shift;
 314         dbg("connect $conn->{cnum}: lineend set to $val ") if isdbg('connect');
 315         $val =~ s/\\r/\r/g;
 316         $val =~ s/\\n/\n/g;
 317         $conn->{lineend} = $val;
 318 }
 319
 320 sub _dochat
 321 {
 322         my $conn = shift;
 323         my $cmd = shift;
 324         my $line = shift;
 325         my $expect = shift;
 326         my $send = shift;
 327
 328         if ($line) {
 329                 if ($expect) {
 330                         dbg("connect $conn->{cnum}: expecting: \"$expect\" received: \"$line\"") if isdbg('connect');
 331                         if ($conn->{abort} && $line =~ /$conn->{abort}/i) {
 332                                 dbg("connect $conn->{cnum}: aborted on /$conn->{abort}/") if isdbg('connect');
 333                                 $conn->disconnect;
 334                                 delete $conn->{cmd};
 335                                 return;
 336                         }
 337                         if ($line =~ /\Q$expect/i) {
 338                                 if (length $send) {
 339                                         dbg("connect $conn->{cnum}: got: \"$expect\" sending: \"$send\"") if isdbg('connect');
 340                                         $conn->send_later("D$conn->{call}|$send");
 341                                 }
 342                                 delete $conn->{msg}; # get rid any input if a match
 343                                 return;
 344                         }
 345                 }
 346         }
 347         $conn->{state} = 'WC';
 348         unshift @{$conn->{cmd}}, $cmd;
 349 }
 350
 351 sub _timedout
 352 {
 353         my $conn = shift;
 354         dbg("connect $conn->{cnum}: timed out after $conn->{timeval} seconds") if isdbg('connect');
 355         $conn->disconnect;
 356 }
 357
 358 # handle callsign and connection type firtling
 359 sub _doclient
 360 {
 361         my $conn = shift;
 362         my $line = shift;
 363         my @f = split /\s+/, $line;
 364         my $call = uc $f[0] if $f[0];
 365         $conn->conns($call);
 366         $conn->{csort} = $f[1] if $f[1];
 367         $conn->{state} = 'C';
 368         eval {$conn->{peerhost} = $conn->{sock}->handle->peerhost} unless $conn->ax25;
 369         &{$conn->{rproc}}($conn, "O$call|$conn->{csort}");
 370         delete $conn->{cmd};
 371         $conn->{timeout}->del if $conn->{timeout};
 372 }
 373
 374 sub _send_file
 375 {
 376         my $conn = shift;
 377         my $fn = shift;
 378
 379         if (-e $fn) {
 380                 my $f = new IO::File $fn;
 381                 if ($f) {
 382                         while (<$f>) {
 383                                 chomp;
 384                                 my $l = $_;
 385                                 dbg("connect $conn->{cnum}: $l") if isdbg('connll');
 386                                 $conn->send_raw($l . $conn->{lineend});
 387                         }
 388                         $f->close;
 389                 }
 390         }
 391 }