# $Id: rx.py 23 2006-11-08 15:45:33Z jonojono $

"""Rx Protocol."""

import dpkt

# Types
DATA                    = 0x01
ACK                     = 0x02
BUSY                    = 0x03
ABORT                   = 0x04
ACKALL                  = 0x05
CHALLENGE               = 0x06
RESPONSE                = 0x07
DEBUG                   = 0x08

# Flags
CLIENT_INITIATED        = 0x01 
REQUEST_ACK             = 0x02
LAST_PACKET             = 0x04
MORE_PACKETS            = 0x08
SLOW_START_OK           = 0x20
JUMBO_PACKET            = 0x20

# Security
SEC_NONE                = 0x00
SEC_BCRYPT              = 0x01
SEC_RXKAD               = 0x02
SEC_RXKAD_ENC           = 0x03

class Rx(dpkt.Packet):
    __hdr__ = (
        ('epoch', 'I', 0),
        ('cid', 'I', 0),
        ('call', 'I', 1),
        ('seq', 'I', 0),
        ('serial', 'I', 1),
        ('type', 'B', 0),
        ('flags', 'B', CLIENT_INITIATED),
        ('status', 'B', 0),
        ('security', 'B', 0),
        ('sum', 'H', 0),
        ('service', 'H', 0)
        )