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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
from __future__ import absolute_import, division, print_function
import struct
import binascii
class BBType(object):
command = 1
command_return = 2
consolemsg = 3
ping = 4
pong = 5
getenv = 6
getenv_return = 7
fs = 8
fs_return = 9
md = 10
md_return = 11
mw = 12
mw_return = 13
reset = 14
class BBPacket(object):
def __init__(self, p_type=0, p_flags=0, payload="", raw=None):
self.p_type = p_type
self.p_flags = p_flags
if raw is not None:
self.unpack(raw)
else:
self.payload = payload
def __repr__(self):
return "BBPacket(%i, %i)" % (self.p_type, self.p_flags)
def _unpack_payload(self, data):
self.payload = data
def _pack_payload(self):
return self.payload
def unpack(self, data):
self.p_type, self.p_flags = struct.unpack("!HH", data[:4])
self._unpack_payload(data[4:])
def pack(self):
return struct.pack("!HH", self.p_type, self.p_flags) + \
self._pack_payload()
class BBPacketCommand(BBPacket):
def __init__(self, raw=None, cmd=None):
self.cmd = cmd
super(BBPacketCommand, self).__init__(BBType.command, raw=raw)
def __repr__(self):
return "BBPacketCommand(cmd=%r)" % self.cmd
def _unpack_payload(self, payload):
self.cmd = payload
def _pack_payload(self):
return self.cmd
class BBPacketCommandReturn(BBPacket):
def __init__(self, raw=None, exit_code=None):
self.exit_code = exit_code
super(BBPacketCommandReturn, self).__init__(BBType.command_return,
raw=raw)
def __repr__(self):
return "BBPacketCommandReturn(exit_code=%i)" % self.exit_code
def _unpack_payload(self, data):
self.exit_code, = struct.unpack("!L", data[:4])
def _pack_payload(self):
return struct.pack("!L", self.exit_code)
class BBPacketConsoleMsg(BBPacket):
def __init__(self, raw=None, text=None):
self.text = text
super(BBPacketConsoleMsg, self).__init__(BBType.consolemsg, raw=raw)
def __repr__(self):
return "BBPacketConsoleMsg(text=%r)" % self.text
def _unpack_payload(self, payload):
self.text = payload
def _pack_payload(self):
return self.text
class BBPacketPing(BBPacket):
def __init__(self, raw=None):
super(BBPacketPing, self).__init__(BBType.ping, raw=raw)
def __repr__(self):
return "BBPacketPing()"
class BBPacketPong(BBPacket):
def __init__(self, raw=None):
super(BBPacketPong, self).__init__(BBType.pong, raw=raw)
def __repr__(self):
return "BBPacketPong()"
class BBPacketGetenv(BBPacket):
def __init__(self, raw=None, varname=None):
self.varname = varname
super(BBPacketGetenv, self).__init__(BBType.getenv, raw=raw)
def __repr__(self):
return "BBPacketGetenv(varname=%r)" % self.varname
def _unpack_payload(self, payload):
self.varname = payload
def _pack_payload(self):
return self.varname
class BBPacketGetenvReturn(BBPacket):
def __init__(self, raw=None, text=None):
self.text = text
super(BBPacketGetenvReturn, self).__init__(BBType.getenv_return,
raw=raw)
def __repr__(self):
return "BBPacketGetenvReturn(varvalue=%s)" % self.text
def _unpack_payload(self, payload):
self.text = payload
def _pack_payload(self):
return self.text
class BBPacketFS(BBPacket):
def __init__(self, raw=None, payload=None):
super(BBPacketFS, self).__init__(BBType.fs, payload=payload, raw=raw)
def __repr__(self):
return "BBPacketFS(payload=%r)" % self.payload
class BBPacketFSReturn(BBPacket):
def __init__(self, raw=None, payload=None):
super(BBPacketFSReturn, self).__init__(BBType.fs_return, payload=payload, raw=raw)
def __repr__(self):
return "BBPacketFSReturn(payload=%r)" % self.payload
class BBPacketMd(BBPacket):
def __init__(self, raw=None, path=None, addr=None, size=None):
self.path = path
self.addr = addr
self.size = size
super(BBPacketMd, self).__init__(BBType.md, raw=raw)
def __repr__(self):
return "BBPacketMd(path=%r,addr=0x%x,size=%u)" % (self.path, self.addr, self.size)
def _unpack_payload(self, payload):
buffer_offset, self.addr, self.size, path_size, path_offset = struct.unpack("!HHHHH", payload[:10])
# header size is always 4 bytes (HH), so adjust the absolute data offset without the header size
absolute_path_offset = buffer_offset + path_offset - 4
self.path = payload[absolute_path_offset:absolute_path_offset+path_size]
def _pack_payload(self):
# header size is always 4 bytes (HH) and we have 10 bytes of fixed data (HHHHH), so buffer offset is 14
return struct.pack("!HHHHH%ds" % len(self.path), 14, self.addr, self.size, len(self.path), 0, self.path)
class BBPacketMdReturn(BBPacket):
def __init__(self, raw=None, exit_code=None, data=None):
self.exit_code = exit_code
self.data = data
super(BBPacketMdReturn, self).__init__(BBType.md_return, raw=raw)
def __repr__(self):
return "BBPacketMdReturn(exit_code=%i, data=%s)" % (self.exit_code, binascii.hexlify(self.data))
def _unpack_payload(self, payload):
buffer_offset, self.exit_code, data_size, data_offset = struct.unpack("!HLHH", payload[:10])
# header size is always 4 bytes (HH), so adjust the absolute data offset without the header size
absolute_data_offset = buffer_offset + data_offset - 4
self.data = payload[absolute_data_offset:absolute_data_offset + data_size]
def _pack_payload(self):
# header size is always 4 bytes (HH) and we have 10 bytes of fixed data (HLHH), so buffer offset is 14
return struct.pack("!HLHH%ds" % len(self.data), 14, self.exit_code, len(self.data), 0, self.data)
return self.text
class BBPacketMw(BBPacket):
def __init__(self, raw=None, path=None, addr=None, data=None):
self.path = path
self.addr = addr
self.data = data
super(BBPacketMw, self).__init__(BBType.mw, raw=raw)
def __repr__(self):
return "BBPacketMw(path=%r,addr=0x%x,data=%r)" % (self.path, self.addr, self.data)
def _unpack_payload(self, payload):
buffer_offset, self.addr, path_size, path_offset, data_size, data_offset = struct.unpack("!HHHHHH", payload[:12])
# header size is always 4 bytes (HH), so adjust the absolute data offset without the header size
absolute_path_offset = buffer_offset + path_offset - 4
self.path = payload[absolute_path_offset:absolute_path_offset+path_size]
absolute_data_offset = buffer_offset + data_offset - 4
self.data = payload[absolute_data_offset:absolute_data_offset+data_size]
def _pack_payload(self):
# header size is always 4 bytes (HH) and we have 12 bytes of fixed data (HHHHHH), so buffer offset is 16
path_size = len(self.path)
data_size = len(self.data)
return struct.pack("!HHHHHH%ds%ds" % (path_size, path_size), 16, self.addr, path_size, 0, data_size, path_size, self.path, self.data)
class BBPacketMwReturn(BBPacket):
def __init__(self, raw=None, exit_code=None, written=None):
self.exit_code = exit_code
self.written = written
super(BBPacketMwReturn, self).__init__(BBType.mw_return, raw=raw)
def __repr__(self):
return "BBPacketMwReturn(exit_code=%i, written=%i)" % (self.exit_code, self.written)
def _unpack_payload(self, payload):
buffer_offset, self.exit_code, self.written = struct.unpack("!HLH", payload[:8])
def _pack_payload(self):
# header size is always 4 bytes (HH) and we have 8 bytes of fixed data (HLH), so buffer offset is 14
return struct.pack("!HLH", 12, self.exit_code, self.written)
class BBPacketReset(BBPacket):
def __init__(self, raw=None, force=None):
self.force = force
super(BBPacketReset, self).__init__(BBType.reset, raw=raw)
def __repr__(self):
return "BBPacketReset(force=%c)" % (self.force)
def _unpack_payload(self, payload):
self.force = struct.unpack("?", payload[:1])
def _pack_payload(self):
return struct.pack("?", self.force)
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