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#!/usr/bin/perl |
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|
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use Event; |
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use Time::HiRes qw(time); |
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use Curses; |
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use Socket; |
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|
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$DEV = "eth1"; |
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$RAWDEV = "wifi0"; |
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$PROC = "/proc/driver/aironet/$DEV"; |
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|
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$SIG{INT} = |
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$SIG{TERM} = |
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$SIG{HUP} = sub { exit }; |
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|
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sub config { |
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open my $config, ">$PROC/Config" |
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or die "$PROC/Config: $!"; |
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print $config $_[0]; |
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} |
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|
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config "Mode: yna\n"; |
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system "ifconfig", $DEV, "up"; |
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system "ifconfig", $RAWDEV, "up"; |
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|
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my $initscr; |
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sub init_screen { |
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initscr; |
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$initscr = 1; |
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start_color; |
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cbreak; noecho; |
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immedok 0; nonl; raw; intrflush 0; keypad 1; |
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idlok 1; scrollok 0; leaveok 0; |
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} |
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|
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sub end_win { |
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endwin if $initscr--; |
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} |
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|
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init_screen; |
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|
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my $refresh = Event->idle(nice => -5, parked => 1, min => 0.01, max => 1, repeat => 0, cb => sub { |
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@menu = (); |
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&$curmenu; |
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|
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$menu_idx += @menu if $menu_idx < 0; |
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$menu_idx -= @menu if $menu_idx >= @menu; |
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|
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erase; |
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|
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move 0, 0; |
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addstr $frame++; |
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|
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for my $idx (0 .. $#menu) { |
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move 1 + $idx, 0; |
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standout if $idx == $menu_idx; |
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addstr $menu[$idx][0]; |
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standend if $idx == $menu_idx; |
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} |
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|
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move 2 + scalar@menu, 0; |
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eval { |
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$menu[$menu_idx][1]->(); |
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}; |
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|
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refresh; |
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}); |
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|
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Event->io(fd => \*STDIN, poll => 'r', cb => sub { |
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my $ch = getch; |
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if ($ch eq "\x1b" or $ch eq "q") { |
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Event::unloop; |
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} elsif ($ch eq KEY_DOWN or $ch eq "j") { |
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$menu_idx++; |
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} elsif ($ch eq KEY_UP or $ch eq "k") { |
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$menu_idx--; |
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} else { |
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eval { |
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$menu[$menu_idx][2]->($ch); |
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}; |
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} |
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$refresh->start; |
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}); |
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|
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END { |
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end_win; |
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config "Mode: adhoc\n"; |
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} |
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|
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sub decode_tags { |
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my $pkt = shift; |
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my %tag; |
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|
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while ($pkt) { |
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my ($id, $len) = unpack "C C", $pkt; |
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my $data = substr $pkt, 2, $len; |
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$pkt = substr $pkt, 2 + $len; |
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|
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$id = ({ |
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0 => SSID, |
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1 => rates, |
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2 => FH, |
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3 => DS, |
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4 => CF, |
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5 => TIM, |
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6 => IBSS, |
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16 => challenge, |
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})->{$id}; |
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$tag{$id} = $data; |
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} |
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|
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%tag; |
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} |
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|
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sub PF_PACKET (){ 17 } |
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sub SOCK_RAW (){ 3 } |
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sub ETH_P_ALL (){ 0x0003 } |
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sub SIOCGIFINDEX (){ 0x000008933 } |
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|
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sub open_pcap_socket { |
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socket my $cap, PF_PACKET, SOCK_RAW, (unpack "s", pack "n", ETH_P_ALL) |
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or die "unable to open packet socket: $!"; |
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|
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my $ifidx = pack "a16 I", $RAWDEV; |
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ioctl $cap, SIOCGIFINDEX, $ifidx |
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or die "can't get index of interface $RAWDEV: $!"; |
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$ifidx = unpack "x16 I", $ifidx; |
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|
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bind $cap, pack "S! S! I S! C C a8", PF_PACKET, (unpack "s", pack "n", ETH_P_ALL), $ifidx |
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or die "unable to bind to interface: $!"; |
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|
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$cap; |
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} |
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|
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sub e2h($) { |
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join ":", map unpack("H*", $_), split //, $_[0]; |
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} |
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|
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sub add_menu { |
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my ($title, $display, $select) = @_; |
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push @menu, [$title, $display, $select]; |
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} |
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|
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$curmenu = \&menu_bss_list; |
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|
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sub bss2string { |
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my $bss = shift; |
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|
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my $s = "AGE(" . int(time - $bss->{ts}) . ") " |
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. "IP($bss->{ip}) " |
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. "ARP($bss->{arp}) "; |
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while (my ($k, $v) = each %{$bss->{ap}}) { |
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$s .= "(" . e2h($k) . " $v->{mode} '$v->{essid}') "; |
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} |
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$s; |
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} |
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|
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sub display_bss { |
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my $bss = shift; |
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|
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addstr "TS: $bss->{ts}\n"; |
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addstr "ARP/IP packets received: $bss->{arp}/$bss->{ip}\n"; |
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|
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addstr "\naccess points\n"; |
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|
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while (my ($k, $v) = each %{$bss->{ap}}) { |
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addstr " " . e2h($k) . "\n"; |
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addstr " mode $v->{mode}, channel $v->{channel}, essid '$v->{essid}'\n"; |
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addstr " beacon frames received $v->{beacon}\n"; |
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} |
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|
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addstr "\nstations\n"; |
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|
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while (my ($k, $v) = each %{$bss->{station}}) { |
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addstr " " . e2h($k); |
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while (my ($k, $v) = each %$v) { |
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addstr " " . (inet_ntoa $k) . "($v)"; |
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} |
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addstr "\n"; |
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} |
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} |
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|
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sub menu_bss_list { |
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my @menu; |
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while (my ($k, $v) = each %$db) { |
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add_menu e2h($k) . " " . bss2string($v), |
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sub { display_bss $v }, |
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sub { |
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if ($_[0] eq KEY_LEFT or $_[0] eq "h") { |
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Event::unloop; |
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} elsif ($_[0] eq KEY_RIGHT or $_[0] eq "l") { |
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#$curmenu = sub { display_bss $k }; |
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} |
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} for 1..3; |
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} |
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} |
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|
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sub activity { |
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$db->{$_[0]}->{ts} = time; |
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#print "activity ", e2h $_[0]; print "\n"; |
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$refresh->start; |
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} |
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|
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sub reg_ip { |
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my ($bssid, $ip, $ether) = @_; |
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$db->{$bssid}{station}{$ether}{$ip}++; |
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activity $bssid; |
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} |
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|
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{ |
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my $cap = open_pcap_socket; |
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my $pkt; |
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|
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Event->io(fd => $cap, poll => 'r', cb => sub { |
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sysread $$cap, $pkt, 120; |
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|
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my ($fc1, $fc2, $sid, $a1, $a2, $a3, $sc, $pkt) |
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= unpack "C C n a6 a6 a6 S a*", $pkt; |
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|
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$pkt = substr $pkt, 6 if $fc2 & 0x03 == 0x03; # skip A4 |
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|
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if ($fc1 == 0x80 or $fc1 == 0x50) { |
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my ($ts1, $ts2, $bi, $cf, $pkt) |
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= unpack "L L S S a*", $pkt; |
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|
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my %tag = decode_tags $pkt; |
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|
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my $ap = $db->{$a3}{ap}{$a2} ||= {}; |
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$ap->{mode} = ($cf & 3) == 1 ? "AP" : "adhoc"; |
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$ap->{essid} = $tag{SSID}; |
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$ap->{channel} = ord $tag{DS}; |
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$ap->{beacon}++; |
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|
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activity $a3; |
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} elsif ($fc1 == 0x08) { |
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my $bssid = ($a3, $a2, $a1)[$fc2 & 3]; |
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|
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my ($llc, $et, $pkt) = unpack "a6 n a*", $pkt; |
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if ($llc eq "\xaa\xaa\x03\x00\x00\x00") { # SNAP/UI/ENCAP_ETHER |
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if ($et == 0x0800) { |
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my ($vhl, $tos, $len, $id, $off, $ttl, $prot, $sum, $src, $dst, $pkt) |
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= unpack "C C n n n C C n a4 a4 a*", $pkt; |
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if ($vhl & 0x40 == 0x40) { |
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$db->{$bssid}{ip}++; |
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reg_ip $bssid, $src, $a2; |
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reg_ip $bssid, $dst, $a1; |
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0 && |
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printf "IP: %02x %02x %04x %04x: %s %s> %s %s %02x \n", |
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$fc1, $fc2, $sid, $sc, |
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(unpack "H*", $a2), (inet_ntoa $src), |
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(unpack "H*", $a1), (inet_ntoa $dst), |
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$prot; |
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} |
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} elsif ($et == 0x0806) { |
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my ($hrd, $pro, $hln, $pln, $op, $src_hw, $src, $dst_hw, $dst) |
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= unpack "n n C C n a6 a4 a6 a4", $pkt; |
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if ($hrd == 1 and $hln == 6 and $pln == 4) { |
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reg_ip $bssid, $src, $src_hw; |
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reg_ip $bssid, $dst, $dst_hw if $op != 1; |
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$db->{$bssid}{arp}++; |
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0 && |
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printf "ARP: %04x> %s %s : %s %s\n", |
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$op, |
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(unpack "H*", $src_hw), (inet_ntoa $src), |
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(unpack "H*", $dst_hw), (inet_ntoa $dst); |
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} |
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} |
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} else { |
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0 && |
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printf "?? %02x %02x %04x %04x: %s.%s \n", $fc1, $fc2, $sid, $sc, (unpack "H*", $llc), unpack "H*", $pkt; |
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} |
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} elsif ($fc1 != 0x40 and $fc1 != 0x10 and $fc1 != 0x00 and $fc1 != 0xb0) { |
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0 && |
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printf "%02x %02x %04x %04x: %s \n", $fc1, $fc2, $sid, $sc, unpack "H*", $pkt; |
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} |
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}); |
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} |
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|
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Event::loop; |
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|
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|
