def keepAvahiBrowsing(thread_name, ipaddresses, lock, option):
print("start keepAvahiBrowsing: threadname=" + thread_name + " option=" + option)
while( True ):
(output, err) = runShellCommand("avahi-browse -rtp _coap._udp | grep 'piSenseHat-4'")
if( (err == None) or (output == None or len(output) == 0) ):
print("SpotFinderThread: error avahi-browse err=" + str(err) + ",out=" + output)
else:
lines = output.splitlines()
for line in lines:
arr = line.split(";")
if( len(arr) >= 8 ):
ip = arr[7]
#print("SpotFinderThread: testing ip=" + ip + ",isValidIp=" + str(isValidIpv4(ip)) + ",in=" + str(ip in ipaddresses))
lock.acquire()
if( isValidIpv4(ip) and (ip in ipaddresses) == False ):
print("SpotFinderThread: client-ip found ip=" + ip)
b = False
if(option == "skip"):
b = True
else:
b = sendServerIPtoParkingSpot("sendServerIPtoParkingSpot", ip, getOwnIP())
if( b == True ):
RequestUtils.createParkingSpot(ip)
ipaddresses.append(ip)
lock.release()
time.sleep(5)
