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# -*- coding: utf-8 -*-
import asynchat
import asyncore
import socket
import sys
import logging
import os
from lxml import objectify
from lxml import etree
logger = logging.getLogger("ebus.core")
logger.setLevel(logging.INFO)
class UnknownPacketException(Exception):
pass
class EbusPacket(object):
EBUS_SPECIFICATION = os.path.join(os.path.dirname(__file__), "ebus_specification.xml")
ebus_xml = objectify.parse(open(EBUS_SPECIFICATION))
@staticmethod
def address_to_type(address):
d=[dev.get("type") for dev in EbusPacket.ebus_xml.xpath("/ebus/devices/device[@address=$address]",
address="#x%.2x"%address)]
return len(d)>0 and d[0] or None
def __init__(self, source, destination, primary_command, secondary_command):
self.source = source
self.destination = destination
self.primary_command = primary_command
self.secondary_command = secondary_command
def __str__(self):
#XXX self.length only in subclasses
return "<%-18s name=\"%s\" source=\"0x%.2x\" destination=\"0x%.2x\" primary=0x%x secondary=0x%x length=0x%x>" % \
(self.__class__.__name__, self.name(), self.source, self.destination, \
self.primary_command, self.secondary_command, self.length)
def get_packet_description(self):
p=EbusPacket.ebus_xml.xpath("/ebus/packets/packet[@primary=$primary and @secondary=$secondary]",
primary="#x%.2x"%self.primary_command,
secondary="#x%.2x"%self.secondary_command)
if len(p)>0 and p[0] is not None:
return p[0]
else:
raise UnknownPacketException("Unknown Packet, primary_command=#x%.2x secondary_command=#x%.2x" % (
self.primary_command,
self.secondary_command))
def get_source_name(self):
s=EbusPacket.ebus_xml.xpath("/ebus/devices/device[@address=$address]",
address="#x%.2x"%self.source)
return len(s)>0 and s[0].get("name") or None
def get_destination_name(self):
d=EbusPacket.ebus_xml.xpath("/ebus/devices/device[@address=$address]",
address="#x%.2x"%self.destination)
return len(d)>0 and d[0].get("name") or None
def name(self):
return self.get_packet_description().get("name")
def description(self):
return self.get_packet_description().get("description")
class EbusMasterMaster(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, data):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
self.length = len(data)
self.data = data
class EbusMasterSlave(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, request, response):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
self.length = len(request)
self.request = request
self.response = response
self.data = self.request #XXX
class EbusBroadcast(EbusPacket):
def __init__(self, source, destination, primary_command, secondary_command, data):
EbusPacket.__init__(self, source, destination, primary_command, secondary_command)
self.length = len(data)
self.data = data
class EbusReader(asynchat.async_chat):
def __init__(self):
asynchat.async_chat.__init__(self)
self.set_terminator("")
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.connect(("10.2.2.200", 7970))
self.packetIndex = 0
self.buf = ""
self.debug = False
def collect_incoming_data(self,data):
for it in range(len(data)):
if data[it] == "\xaa":
if it+1 < len(data) and data[it+1] != "\xaa":
self._parse(self.buf)
self.buf = ""
self.packetIndex = 0
else:
self.buf += data[it]
self.packetIndex = self.packetIndex + 1
#print "%.2x [%d]" % (ord(data[it]),self.packetIndex)
def _parse(self,dataRaw):
#0xaa bug
i = 0
data = ""
while (i+1) < len(dataRaw):
if ord(dataRaw[i]) == 0xa9 and ord(dataRaw[i+1]) == 0x01:
data += "\xaa"
i = i + 1
elif ord(dataRaw[i]) == 0xa9 and ord(dataRaw[i+1]) == 0x00:
data += "\xa9"
i = i + 1
else:
data += dataRaw[i]
i = i + 1
if len(data) < 2:
logger.critical("Daten Gaga")
return
source = ord(data[0])
sourceType = EbusPacket.address_to_type(source)
destination = ord(data[1])
destinationType = EbusPacket.address_to_type(destination)
if len(data) < 9:
logger.critical("Unvollständige Daten")
return
primaryCommand = ord(data[2])
secondaryCommand = ord(data[3])
payloadLength = ord(data[4])
payload = data[5:5+payloadLength]
if self.debug:
print "\033[1;31m%.2x %.2x\033[1;m \033[1;33m%.2x %.2x\033[1;m \033[1;30m%.2x\033[1;m \033[1;45m%s\033[1;m" % (
source,
destination,
primaryCommand,
secondaryCommand,
payloadLength,
" ".join(map(lambda byte: "%.2x"%ord(byte), payload)))
try:
if sourceType == 'master' and destinationType == 'master':
p = EbusMasterMaster(source, destination, primaryCommand, secondaryCommand, payload)
self.handle_ebus(p)
elif sourceType == 'master' and destinationType == 'slave':
p = EbusMasterSlave(source, destination, primaryCommand, secondaryCommand, payload, None) #FIXME
logger.info("SKIP MASTER-SLAVE")
elif sourceType == 'master' and destinationType == 'broadcast':
p = EbusBroadcast(source, destination, primaryCommand, secondaryCommand, payload)
self.handle_ebus(p)
else:
logger.warning("SKIP source=%s sourceType=%s destination=%s destType=%s" % \
(source, sourceType, destination, destinationType))
except UnknownPacketException,e:
print e
def handle_ebus(self,ebus_packet):
logger.critical("unhandled ebus_packet")
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