'Please enter reg (to register), drg (to deregister), or exit (to exit): '
)
if (choice == 'reg'):
print '\nRegistering with Foreign Agent.\nListening...'
# Send frame to register with FA
sendAFrame(1, UDP_IP, addrHA, 'Msg', addrFA, 8000)
# Listen
while True:
# Receive a frame and store it in recvFrame; reset recvData
data, addr = sock.recvfrom(1024)
for c in data:
recvData.append(c)
recvFrame = sendFrame.decodeFrame(recvData)
recvData = bytearray()
fTyp = recvFrame.getType()
fIPA = recvFrame.getIpA()
fIPB = recvFrame.getIpB()
fMsg = recvFrame.getMessage()
# Print out received data to visually confirm
print ''
print 'Received Type is: ' + str(fTyp)
print 'Received IP A is: ' + fIPA
print 'Received IP B is: ' + fIPB
print 'Received Message is: ' + fMsg
# Process received frame
if (fTyp == 8):
#set target to home agent
trgtIP = addrHA
trgtPrt = 7000
sfMsg = message
#this informs correspondent that no mobile node wtih that IP is registered
sendFrame = Frame(sfTyp, sfIPA, sfIPB, sfMsg)
sock.sendto(sendFrame.encodeFrame(), (trgtIP, trgtPrt))
print '\nWaiting for a response...\n'
# Receive a response
data, addr = sock.recvfrom(1024)
for c in data:
recvData.append(c)
recvFrame = recvFrame.decodeFrame(recvData)
recvData = bytearray()
fTyp = recvFrame.getType()
fIPA = recvFrame.getIpA()
fIPB = recvFrame.getIpB()
fMsg = recvFrame.getMessage()
if (fTyp == 6):
# Mobile node wasn't registered
print 'Mobile Node is not registered with Home Agent\n'
elif (fTyp == 9):
print 'Message from Mobile Node: ' + fMsg + '\n'
else:
print 'Frame type invalid\n'
