import urllib, time, re, os, smtplib, string

dataFile = "/tempip.html"
configFile = "/configip.dat"
ipAddress = ""
i = "1"

def loadConfig():
	if os.path.exists(configFile):
		cfgSize = os.stat(configFile).st_size
		cfgFile = file(configFile,"r")
		cfgBuffer = cfgFile.read(cfgSize)
		cfgFile.close()
		
		print "Configuration file present."
		print "Configuration file size is:  ", cfgSize

		query = re.compile('[0-9]{2}\.[0-9]{2}\.[0-9]{2,3}\.[0-9]{2,3}')
		match = query.search(cfgBuffer)

		if match:
			print "Configuration file IP address is: ", match.group(), "\n\n"
			global ipAddress
			ipAddress = match.group()
		else:
			print "No IP address found in configuration file...\n\n"
	else:
		print "No configuration file present.  Loading without...\n\n"

def getData():
	urllib.urlretrieve("http://gateway.2wire.net/broadband/index.html",dataFile)
	urllib.urlcleanup()

def parseData():
	if os.path.exists(dataFile):
		ipSize = os.stat(dataFile).st_size
		ipFile = file(dataFile,"r")
		ipBuffer = ipFile.read(ipSize)
		ipFile.close()
		
		query = re.compile('[0-9]{2}\.[0-9]{2}\.[0-9]{2,3}\.[0-9]{2,3}')
		match = query.search(ipBuffer)

		if match:
			currentIP = match.group()
			if currentIP != ipAddress:
				newIP(currentIP)
		os.remove(dataFile)

def newIP(address):
	print time.ctime(),"| IP Address changed to: ", address
	global ipAddress
	ipAddress = address
	writeConfig(address)
	notify(address)

def notify(address):
	fromAddress = "IPFinder <you@yourdomain.com>"
	toAddress = ["someone@somewhere.com", "someoneElse@somewhereElse.com"]
	subject = "IPFinder Address Reporting"
	info = time.ctime() + " | IP Address changed to: " + address
	myMessage = "Date: " + time.ctime() + "\r\nFrom: " + fromAddress + "\r\nSubject: " + subject + "\r\nTo: " + string.join(toAddress, ", ") + "\r\n\r\n" + str(info)
	server = smtplib.SMTP("smtp.server")
	server.login("username","password")
	server.sendmail(fromAddress,toAddress,myMessage)
	

def writeConfig(address):
	writeString = str(address)
	cfgFile = file(configFile,"w")
	cfgFile.truncate(0)
	cfgFile.write(writeString)
	cfgFile.close()


print "System Initializing..."

loadConfig()

while i == "1":
	getData()
	parseData()
	time.sleep(600)