mirror of https://github.com/aredn/aredn.git
158 lines
3.3 KiB
Perl
Executable File
158 lines
3.3 KiB
Perl
Executable File
#!/usr/bin/perl
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# GPL V2 or greater
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# Used to control the 4 led's on ubiquti for device aiming.
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# Written by Conrad Lara KG6JEI
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sub aimmode_printusage{
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print "USAGE:\n";
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print "$0 SSID\n";
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die;
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}
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# SSID NAME
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if ( $ARGV[0] ) {
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$SSIDName= lc $ARGV[0];
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}
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else
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{
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$SSIDName= lc "AREDN-20-v3";
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}
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#dbm values for each RSSI trigger level
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$RSSI_4=-65;
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$RSSI_3=-73;
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$RSSI_2=-80;
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$RSSI_1=-94;
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# LED Set Wrappe
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sub SetLED {
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($fh, $state ) = @_ ;
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print $fh $state ;
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binmode($fh);
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}
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# Reset LED's to baseline
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sub init_led_triggers {
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open ( LINK4_trigger,'>/sys/class/leds/ubnt:green:link4/trigger');
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open ( LINK3_trigger,'>/sys/class/leds/ubnt:green:link3/trigger');
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open ( LINK2_trigger,'>/sys/class/leds/ubnt:orange:link2/tigger');
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open ( LINK1_trigger,'>/sys/class/leds/ubnt:red:link1/trigger');
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print LINK4_trigger "none";
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print LINK3_trigger "none";
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print LINK2_trigger "none";
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print LINK1_trigger "none";
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close ( LINK4_trigger);
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close ( LINK3_trigger);
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close ( LINK2_trigger);
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close ( LINK1_trigger);
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}
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sub aimmode_start {
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# Prep the system
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system('/etc/init.d/linkled stop');
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system('/etc/init.d/olsrd stop');
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system('/sbin/ifdown wifi');
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system('/sbin/ifdown wifi_mon');
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system('/usr/sbin/iw phy phy0 interface add mon0 type monitor');
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system('/usr/sbin/iw dev mon0 set channel 1');
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system('/sbin/ifconfig mon0 up');
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#Open up the files we will need to run with
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# Run tcpdump in buffered (-l) mode so each line returns with a newline
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open ( $TCPDUMP,"/usr/sbin/tcpdump -l -i mon0 \"link[0] == 0x80\" |");
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open ( $LINK4_led,'>/sys/class/leds/ubnt:green:link4/brightness');
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open ( $LINK3_led,'>/sys/class/leds/ubnt:green:link3/brightness');
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open ( $LINK2_led,'>/sys/class/leds/ubnt:orange:link2/brightness');
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open ( $LINK1_led,'>/sys/class/leds/ubnt:red:link1/brightness');
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}
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sub aimmode_shutdown {
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#Turn off all LED's except LINk4
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SetLED ($LINK4_led, 1);
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SetLED ($LINK3_led, 0);
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SetLED ($LINK2_led, 0);
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SetLED ($LINK1_led, 0);
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close ($TCPDUMP);
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close ($LINK4_led);
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close ($LINK3_led);
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close ($LINK2_led);
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close ($LINK1_led);
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# Brining up wifi is a bit more complicated than just ifconfig up so we let `ifup` handle it ... takes a bit to finish so sleep 10s
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system('ifup wifi');
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system('ifup wifi_mon');
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print "Please wait while we restart the services";
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sleep 10;
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system('/etc/init.d/olsrd start');
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system('/etc/init.d/linkled start');
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}
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init_led_triggers();
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$SIG{INT} = sub { aimmode_shutdown(); exit; };
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aimmode_start();
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# Main while loop
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while ( <$TCPDUMP> )
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{
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next unless /.* ([\d\-]+)dB.*Beacon \((.*)\)/;
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next unless lc $2 eq $SSIDName ;
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#Average the last value and this values in order to tame sudden spikes
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$s=int(($1+$lastvalue)/2);
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print "$s \n";
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if ($s >= $RSSI_4 ) {
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SetLED ($LINK4_led, 1);
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}
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else
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{
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SetLED ($LINK4_led, 0);
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}
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if ($s >= $RSSI_3 ) {
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SetLED ($LINK3_led, 1);
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}
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else
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{
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SetLED ($LINK3_led, 0);
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}
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if ($s >= $RSSI_2 ) {
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SetLED ($LINK2_led, 1);
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}
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else
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{
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SetLED ($LINK2_led, 0);
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}
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if ($s >= $RSSI_1 ) {
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SetLED ($LINK1_led, 1);
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}
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else
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{
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SetLED ($LINK1_led, 0);
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}
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$lastvalue=$s;
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}
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# Normally the SIG{INT} handler will be done before here
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# But in case the TCPDUMP dies out we want to reset the system
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aimmode_shutdown();
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