81 lines
2.6 KiB
Python
81 lines
2.6 KiB
Python
from .packet import Packet
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class DFrame:
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PACKET_COMMAND_DATA = 0x01
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PACKET_COMMAND_RELIABLE = 0x02
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PACKET_COMMAND_SEQUENTIAL = 0x04
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PACKET_COMMAND_POLL = 0x08
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PACKET_COMMAND_NEW_MSG = 0x10
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PACKET_COMMAND_END_MSG = 0x20
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PACKET_COMMAND_USER_1 = 0x40
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PACKET_COMMAND_USER_2 = 0x80
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PACKET_CONTROL_RETRY = 0x01
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PACKET_CONTROL_KEEPALIVE_OR_CORRELATE = 0x02
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PACKET_CONTROL_COALESCE = 0x04
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PACKET_CONTROL_END_STREAM = 0x08
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PACKET_CONTROL_SACK1 = 0x10
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PACKET_CONTROL_SACK2 = 0x20
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PACKET_CONTROL_SEND1 = 0x40
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PACKET_CONTROL_SEND2 = 0x80
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def __init__(self, packet=None):
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self.Command = DFrame.PACKET_COMMAND_DATA
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self.Control = 0x00
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self.Seq = 0
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self.NRcv = 0
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self.SACKMask1 = b''
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self.SACKMask2 = b''
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self.SendMask1 = b''
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self.SendMask2 = b''
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self.Signature = b''
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self.SessID = b''
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self.Payload = b''
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if packet:
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self.parse(packet)
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def parse(self, packet):
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packet.seek(0)
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self.Command = packet.getByte()
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self.Control = packet.getByte()
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self.Seq = packet.getByte()
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self.NRcv = packet.getByte()
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if self.Control & DFrame.PACKET_CONTROL_SACK1:
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self.SACKMask1 = packet.getLong()
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if self.Control & DFrame.PACKET_CONTROL_SACK2:
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self.SACKMask2 = packet.getLong()
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if self.Control & DFrame.PACKET_CONTROL_SEND1:
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self.SendMask1 = packet.getLong()
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if self.Control & DFrame.PACKET_CONTROL_SEND2:
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self.SendMask2 = packet.getLong()
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# TODO: handle signature
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if self.Control & DFrame.PACKET_CONTROL_KEEPALIVE_OR_CORRELATE:
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self.SessID = packet.getLong()
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self.Payload = packet.read()
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def to_packet(self):
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packet = Packet()
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packet.putByte(self.Command)
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packet.putByte(self.Control)
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packet.putByte(self.Seq)
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packet.putByte(self.NRcv)
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if self.Control & DFrame.PACKET_CONTROL_SACK1:
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packet.putLong(self.SACKMask1)
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if self.Control & DFrame.PACKET_CONTROL_SACK2:
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packet.putLong(self.SACKMask2)
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if self.Control & DFrame.PACKET_CONTROL_SEND1:
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packet.putLong(self.SendMask1)
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if self.Control & DFrame.PACKET_CONTROL_SEND2:
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packet.putLong(self.SendMask2)
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if self.Signature:
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packet.putLongLong(self.Signature)
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if self.Control & DFrame.PACKET_CONTROL_KEEPALIVE_OR_CORRELATE:
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packet.putLong(self.SessID)
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packet.putBytes(self.Payload)
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return packet
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