from os import system, popen, path as os_path, listdir
from re import compile as re_compile
from socket import *
from enigma import eConsoleAppContainer
from Components.Console import Console

class Network:
	def __init__(self):
		self.ifaces = {}
		self.configuredInterfaces = []		
		self.nameservers = []
		self.ethtool_bin = "/usr/sbin/ethtool"
		self.container = eConsoleAppContainer()
		self.Console = Console()
		self.getInterfaces()

	def getInterfaces(self, callback = None):
		devicesPattern = re_compile('[a-z]+[0-9]+')
		self.configuredInterfaces = []
		fp = file('/proc/net/dev', 'r')
		system("cat /proc/net/dev")
		result = fp.readlines()
		fp.close()
		for line in result:
			try:
				device = devicesPattern.search(line).group()
				if device == 'wifi0':
					continue
				self.getDataForInterface(device, callback)
			except AttributeError:
				pass

	# helper function
	def regExpMatch(self, pattern, string):
		if string is None:
			return None
		try:
			return pattern.search(string).group()
		except AttributeError:
			None

	# helper function to convert ips from a sring to a list of ints
	def convertIP(self, ip):
		strIP = ip.split('.')
		ip = []
		for x in strIP:
			ip.append(int(x))
		return ip

	def IPaddrFinished(self, result, retval, extra_args):
		(iface, callback ) = extra_args
		data = { 'up': False, 'dhcp': False, 'preup' : False, 'postdown' : False }
		globalIPpattern = re_compile("scope global")
		ipRegexp = '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
		ipLinePattern = re_compile('inet ' + ipRegexp +'/')
		ipPattern = re_compile(ipRegexp)

		for line in result.splitlines():
			split = line.strip().split(' ',2)
			if (split[1] == iface):
				if re_search(globalIPpattern, split[2]):
					ip = self.regExpMatch(ipPattern, self.regExpMatch(ipLinePattern, split[2]))
					if ip is not None:
						data['ip'] = self.convertIP(ip)
		if not data.has_key('ip'):
			data['dhcp'] = True
			data['ip'] = [0, 0, 0, 0]
			data['netmask'] = [0, 0, 0, 0]
			data['gateway'] = [0, 0, 0, 0]

		cmd = "ifconfig " + iface
		self.Console.ePopen(cmd, self.ifconfigFinished, [iface, data, callback])

	def getDataForInterface(self, iface,callback):
		#get ip out of ip addr, as avahi sometimes overrides it in ifconfig.
		cmd = "ip -o addr"
		self.Console.ePopen(cmd, self.IPaddrFinished, [iface,callback])

	def ifconfigFinished(self, result, retval, extra_args ):
		(iface, data, callback ) = extra_args
		ipRegexp = '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
		ipLinePattern = re_compile('inet addr:' + ipRegexp)
		netmaskLinePattern = re_compile('Mask:' + ipRegexp)
		bcastLinePattern = re_compile('Bcast:' + ipRegexp)
		ipPattern = re_compile(ipRegexp)
		upPattern = re_compile('UP ')
		macPattern = re_compile('[0-9]{2}\:[0-9]{2}\:[0-9]{2}\:[0-9]{2}\:[0-9]{2}\:[0-9]{2}')

		for line in result.splitlines():
			#ip = self.regExpMatch(ipPattern, self.regExpMatch(ipLinePattern, line))
			netmask = self.regExpMatch(ipPattern, self.regExpMatch(netmaskLinePattern, line))
			bcast = self.regExpMatch(ipPattern, self.regExpMatch(bcastLinePattern, line))
			up = self.regExpMatch(upPattern, line)
			mac = self.regExpMatch(macPattern, line)
			#if ip is not None:
			#       data['ip'] = self.convertIP(ip)
			if netmask is not None:
				data['netmask'] = self.convertIP(netmask)
			if bcast is not None:
				data['bcast'] = self.convertIP(bcast)
			if up is not None:
				data['up'] = True
				if iface is not 'lo':
					self.configuredInterfaces.append(iface)
			if mac is not None:
				data['mac'] = mac

		cmd = "route -n | grep  " + iface
		self.Console.ePopen(cmd,self.routeFinished,[iface,data,callback])

	def routeFinished(self, result, retval, extra_args):
		(iface, data, callback) = extra_args
		ipRegexp = '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
		ipPattern = re_compile(ipRegexp)
		ipLinePattern = re_compile(ipRegexp)

		for line in result.splitlines():
			print line[0:7]
			if line[0:7] == "0.0.0.0":
				gateway = self.regExpMatch(ipPattern, line[16:31])
				if gateway is not None:
					data['gateway'] = self.convertIP(gateway)

		for line in result.splitlines(): #get real netmask in case avahi has overridden ifconfig netmask
			split = line.strip().split('   ')
			if re_search(ipPattern, split[0]):
				foundip = self.convertIP(split[0])
				if (foundip[0] == data['ip'][0] and foundip[1] == data['ip'][1]):
					if re_search(ipPattern, split[4]):
						mask = self.regExpMatch(ipPattern, self.regExpMatch(ipLinePattern, split[4]))
						if mask is not None:
							data['netmask'] = self.convertIP(mask)
		self.ifaces[iface] = data
		self.loadNetworkConfig(iface,callback)

	def writeNetworkConfig(self):
		self.configuredInterfaces = []
		fp = file('/etc/network/interfaces', 'w')
		fp.write("# automatically generated by enigma 2\n# do NOT change manually!\n\n")
		fp.write("auto lo\n")
		fp.write("iface lo inet loopback\n\n")
		for ifacename, iface in self.ifaces.items():
			if iface['up'] == True:
				fp.write("auto " + ifacename + "\n")
				self.configuredInterfaces.append(ifacename)
			if iface['dhcp'] == True:
				fp.write("iface "+ ifacename +" inet dhcp\n")
			if iface['dhcp'] == False:
				fp.write("iface "+ ifacename +" inet static\n")
				if iface.has_key('ip'):
					print tuple(iface['ip'])
					fp.write("	address %d.%d.%d.%d\n" % tuple(iface['ip']))
					fp.write("	netmask %d.%d.%d.%d\n" % tuple(iface['netmask']))
					if iface.has_key('gateway'):
						fp.write("	gateway %d.%d.%d.%d\n" % tuple(iface['gateway']))
			if iface.has_key("configStrings"):
				fp.write("\n" + iface["configStrings"] + "\n")
			if iface["preup"] is not False and not iface.has_key("configStrings"):
				fp.write(iface["preup"])
				fp.write(iface["postdown"])
			fp.write("\n")				
		fp.close()
		self.writeNameserverConfig()

	def writeNameserverConfig(self):
		fp = file('/etc/resolv.conf', 'w')
		for nameserver in self.nameservers:
			fp.write("nameserver %d.%d.%d.%d\n" % tuple(nameserver))
		fp.close()

	def loadNetworkConfig(self,iface,callback = None):
		interfaces = []
		# parse the interfaces-file
		try:
			fp = file('/etc/network/interfaces', 'r')
			interfaces = fp.readlines()
			fp.close()
		except:
			print "[Network.py] interfaces - opening failed"

		ifaces = {}
		currif = ""
		for i in interfaces:
			split = i.strip().split(' ')
			if (split[0] == "iface"):
				currif = split[1]
				ifaces[currif] = {}
				if (len(split) == 4 and split[3] == "dhcp"):
					ifaces[currif]["dhcp"] = True
				else:
					ifaces[currif]["dhcp"] = False
			if (currif == iface): #read information only for available interfaces
				if (split[0] == "address"):
					ifaces[currif]["address"] = map(int, split[1].split('.'))
					if self.ifaces[currif].has_key("ip"):
						if self.ifaces[currif]["ip"] != ifaces[currif]["address"] and ifaces[currif]["dhcp"] == False:
							self.ifaces[currif]["ip"] = map(int, split[1].split('.'))
				if (split[0] == "netmask"):
					ifaces[currif]["netmask"] = map(int, split[1].split('.'))
					if self.ifaces[currif].has_key("netmask"):
						if self.ifaces[currif]["netmask"] != ifaces[currif]["netmask"] and ifaces[currif]["dhcp"] == False:
							self.ifaces[currif]["netmask"] = map(int, split[1].split('.'))
				if (split[0] == "gateway"):
					ifaces[currif]["gateway"] = map(int, split[1].split('.'))
					if self.ifaces[currif].has_key("gateway"):
						if self.ifaces[currif]["gateway"] != ifaces[currif]["gateway"] and ifaces[currif]["dhcp"] == False:
							self.ifaces[currif]["gateway"] = map(int, split[1].split('.'))
				if (split[0] == "pre-up"):
					if self.ifaces[currif].has_key("preup"):
						self.ifaces[currif]["preup"] = i
				if (split[0] == "post-down"):
					if self.ifaces[currif].has_key("postdown"):
						self.ifaces[currif]["postdown"] = i

		for ifacename, iface in ifaces.items():
			if self.ifaces.has_key(ifacename):
				self.ifaces[ifacename]["dhcp"] = iface["dhcp"]
		if len(self.Console.appContainers) == 0:
			# load ns only once
			self.loadNameserverConfig()
			print "read configured interfac:", ifaces
			print "self.ifaces after loading:", self.ifaces
			if callback is not None:
				callback(True)

	def loadNameserverConfig(self):
		ipRegexp = "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}"
		nameserverPattern = re_compile("nameserver +" + ipRegexp)
		ipPattern = re_compile(ipRegexp)

		resolv = []
		try:
			fp = file('/etc/resolv.conf', 'r')
			resolv = fp.readlines()
			fp.close()
			self.nameservers = []
		except:
			print "[Network.py] resolv.conf - opening failed"

		for line in resolv:
			if self.regExpMatch(nameserverPattern, line) is not None:
				ip = self.regExpMatch(ipPattern, line)
				if ip is not None:
					self.nameservers.append(self.convertIP(ip))

		print "nameservers:", self.nameservers

	def deactivateNetworkConfig(self):
		for iface in self.ifaces.keys():
			system("ip addr flush " + iface)
		system("/etc/init.d/networking stop")
		system("killall -9 udhcpc")
		system("rm /var/run/udhcpc*")

	def activateNetworkConfig(self):
		system("/etc/init.d/networking start")
		self.getInterfaces()

	def getNumberOfAdapters(self):
		return len(self.ifaces)

	def getFriendlyAdapterName(self, x):
		# maybe this needs to be replaced by an external list.
		friendlyNames = {
			"eth0": _("Integrated Ethernet"),
			"wlan0": _("Wireless"),
			"ath0": _("Integrated Wireless")
		}
		return friendlyNames.get(x, x) # when we have no friendly name, use adapter name

	def getAdapterName(self, iface):
		return iface

	def getAdapterList(self):
		return self.ifaces.keys()

	def getAdapterAttribute(self, iface, attribute):
		if self.ifaces.has_key(iface):
			if self.ifaces[iface].has_key(attribute):
				return self.ifaces[iface][attribute]
		return None

	def setAdapterAttribute(self, iface, attribute, value):
		print "setting for adapter", iface, "attribute", attribute, " to value", value
		if self.ifaces.has_key(iface):
			self.ifaces[iface][attribute] = value

	def removeAdapterAttribute(self, iface, attribute):
		if self.ifaces.has_key(iface):
			if self.ifaces[iface].has_key(attribute):
				del self.ifaces[iface][attribute]

	def getNameserverList(self):
		if len(self.nameservers) == 0:
			return [[0, 0, 0, 0], [0, 0, 0, 0]]
		else: 
			return self.nameservers

	def clearNameservers(self):
		self.nameservers = []

	def addNameserver(self, nameserver):
		if nameserver not in self.nameservers:
			self.nameservers.append(nameserver)

	def removeNameserver(self, nameserver):
		if nameserver in self.nameservers:
			self.nameservers.remove(nameserver)

	def changeNameserver(self, oldnameserver, newnameserver):
		if oldnameserver in self.nameservers:
			for i in range(len(self.nameservers)):
				if self.nameservers[i] == oldnameserver:
					self.nameservers[i] = newnameserver

	def writeDefaultNetworkConfig(self,mode='lan'):
		fp = file('/etc/network/interfaces', 'w')
		fp.write("# automatically generated by enigma 2\n# do NOT change manually!\n\n")
		fp.write("auto lo\n")
		fp.write("iface lo inet loopback\n\n")
		if mode == 'wlan':
			fp.write("auto wlan0\n")
			fp.write("iface wlan0 inet dhcp\n")
		if mode == 'wlan-mpci':
			fp.write("auto ath0\n")
			fp.write("iface ath0 inet dhcp\n")
		if mode == 'lan':
			fp.write("auto eth0\n")
			fp.write("iface eth0 inet dhcp\n")
		fp.write("\n")
		fp.close()

	def resetNetworkConfig(self,mode='lan'):
		self.deactivateNetworkConfig()
		self.writeDefaultNetworkConfig(mode)
		if mode == 'wlan':
			system("ifconfig eth0 down")
			system("ifconfig ath0 down")
			system("ifconfig wlan0 up")
		if mode == 'wlan-mpci':
			system("ifconfig eth0 down")
			system("ifconfig wlan0 down")
			system("ifconfig ath0 up")		
		if mode == 'lan':			
			system("ifconfig eth0 up")
			system("ifconfig wlan0 down")
			system("ifconfig ath0 down")
		self.getInterfaces()	

	def checkNetworkState(self):
		 # www.dream-multimedia-tv.de, www.heise.de, www.google.de
		return system("ping -c 1 82.149.226.170") == 0 or \
			system("ping -c 1 193.99.144.85") == 0 or \
			system("ping -c 1 209.85.135.103") == 0

	def restartNetwork(self):
		iNetwork.deactivateNetworkConfig()
		iNetwork.activateNetworkConfig()

	def getLinkState(self,iface,callback):
		self.dataAvail = callback
		cmd = self.ethtool_bin + " " + iface
		self.container.appClosed.append(self.cmdFinished)
		self.container.dataAvail.append(callback)
		self.container.execute(cmd)

	def cmdFinished(self,retval):
		self.container.appClosed.remove(self.cmdFinished)
		self.container.dataAvail.remove(self.dataAvail)

	def stopContainer(self):
		self.container.kill()
		
	def ContainerRunning(self):
		return self.container.running()

	def checkforInterface(self,iface):
		if self.getAdapterAttribute(iface, 'up') is True:
			return True
		else:
			ret=system("ifconfig " + iface + " up")
			system("ifconfig " + iface + " down")
			if ret == 0:
				return True
			else:
				return False

	def checkDNSLookup(self):
		return system("nslookup www.dream-multimedia-tv.de") == 0 or \
			system("nslookup www.heise.de") == 0 or \
			system("nslookup www.google.de")

	def deactivateInterface(self,iface):
		system("ifconfig " + iface + " down")

	def detectWlanModule(self):
		self.wlanmodule = None
		rt73_dir = "/sys/bus/usb/drivers/rt73/"
		zd1211b_dir = "/sys/bus/usb/drivers/zd1211b/"
		madwifi_dir = "/sys/bus/pci/drivers/ath_pci/"
		if os_path.exists(madwifi_dir):
			files = listdir(madwifi_dir)
			if len(files) >= 1:
				self.wlanmodule = 'madwifi'
		if os_path.exists(rt73_dir):
			rtfiles = listdir(rt73_dir)
			if len(rtfiles) == 2:
				self.wlanmodule = 'ralink'
		if os_path.exists(zd1211b_dir):
			zdfiles = listdir(zd1211b_dir)
			if len(zdfiles) == 1:
				self.wlanmodule = 'zydas'
		return self.wlanmodule
	
	
iNetwork = Network()

def InitNetwork():
	pass