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#!/usr/bin/python
# -*- Mode: python; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details:
#
# Copyright (C) 2011 Red Hat, Inc.
#
import binascii
import string
import sys
import defs
import wmc
URBF_UNKNOWN = 0
URBF_GET_DESC = 1
URBF_SEL_CONF = 2
URBF_RESET_PIPE = 3
URBF_TRANSFER = 4
URBF_GET_STATUS = 5
URBF_CONTROL = 6
funcs = {
"-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:": (URBF_GET_DESC, False, None),
"-- URB_FUNCTION_SELECT_CONFIGURATION:": (URBF_SEL_CONF, False, None),
"-- URB_FUNCTION_RESET_PIPE:": (URBF_RESET_PIPE, False, None),
"-- URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER:": (URBF_TRANSFER, True, "T"),
"-- URB_FUNCTION_GET_STATUS_FROM_DEVICE:": (URBF_GET_STATUS, False, None),
"-- URB_FUNCTION_CONTROL_TRANSFER:": (URBF_CONTROL, True, "C")
}
def get_urb_info(l):
num = 0
direction = defs.TO_UNKNOWN
idx = string.find(l, ">>> URB ")
if idx >= 0:
direction = defs.TO_MODEM
else:
idx = string.find(l, "<<< URB ")
if idx >= 0:
direction = defs.TO_HOST
else:
raise Exception("Invalid packet start line")
numstr = ""
for c in l[idx + 9:]:
if c.isdigit():
numstr = numstr + c
else:
break
if not len(numstr):
raise Exception("Failed to get URB number ('%s')" % l)
return (direction, int(numstr))
class Packet:
def __init__(self, lines, control_prot, transfer_prot):
self.direction = defs.TO_UNKNOWN
self.func = URBF_UNKNOWN
self.extra = []
self.data = None
self.urbnum = 0
self.protocol = None
self.has_data = False
self.typecode = None
# Parse the packet
(self.direction, self.urbnum) = get_urb_info(lines[0])
try:
(self.func, self.has_data, self.typecode) = funcs[lines[1].strip()]
except KeyError:
raise KeyError("URB function %s not handled" % lines[1].strip())
if self.func == URBF_TRANSFER:
self.protocol = transfer_prot
elif self.func == URBF_CONTROL:
self.protocol = control_prot
# Parse transfer buffer data
in_data = False
data = ""
for i in range(2, len(lines)):
l = lines[i].strip()
if self.has_data:
if l.startswith("TransferBufferMDL"):
if in_data == True:
raise Exception("Already in data")
in_data = True
elif l.startswith("UrbLink"):
in_data = False
elif in_data and len(l) and not "no data supplied" in l:
d = l[l.index(": ") + 2:] # get data alone
data += d.replace(" ", "")
else:
self.extra.append(l)
if len(data) > 0:
self.parse_data(data)
def get_funcs(self):
if self.protocol:
exec "from %s import get_funcs" % self.protocol
return get_funcs()
return (None, None)
def parse_data(self, data):
if not self.has_data:
raise Exception("Data only valid for URBF_TRANSFER or URBF_CONTROL")
(unpack, show) = self.get_funcs()
if unpack:
self.data = unpack(data, self.direction)
else:
self.data = binascii.unhexlify(data)
def add_ascii(self, line, items):
if len(line) < 53:
line += " " * (53 - len(line))
for i in items:
if chr(i) in string.printable and i >= 32:
line += chr(i)
else:
line += "."
return line
def show(self):
if not self.has_data or not self.data:
return
# Ignore URBF_TRANSFER packets that appear to be returning SetupPacket data
if self.data == chr(0xa1) + chr(0x01) + chr(0x00) + chr(0x00) + chr(0x05) + chr(0x00) + chr(0x00) + chr(0x00):
return
offset = 0
items = []
printed = False
line = ""
prefix = "*"
if self.direction == defs.TO_MODEM:
prefix = ">"
elif self.direction == defs.TO_HOST:
prefix = "<"
if self.typecode:
prefix = prefix + " " + self.typecode + " "
else:
prefix = prefix + " "
prefix_printed = False
for i in self.data:
printed = False
line += " %02x" % ord(i)
items.append(ord(i))
if len(items) % 16 == 0:
output = "%04d: %s" % (offset, self.add_ascii(line, items))
if offset == 0:
print prefix + output
else:
print " " + output
line = ""
items = []
printed = True
offset += 16
prefix_printed = True
if not printed:
output = "%04d: %s" % (offset, self.add_ascii(line, items))
if prefix_printed:
print " " + output
else:
print prefix + output
print ""
(unpack, show) = self.get_funcs()
if show:
show(self.data, " " * 8, self.direction)
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