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70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
# Created by leolin49 on 2022/7/7.
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# Copyright (C) 2022 leolin49. All rights reserved.
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import util
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class Segment:
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start_ip = 0
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end_ip = 0
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region = ""
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def __init__(self, sip=0, eip=0, reg=""):
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self.start_ip, self.end_ip = sip, eip
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self.region = reg
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def split(self) -> list:
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"""Split the segment based on the pre-two bytes."""
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# 1, split the segment with the first byte
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t_list_1 = []
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s_byte_1, e_byte_1 = (self.start_ip >> 24) & 0xFF, (self.end_ip >> 24) & 0xFF
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n_sip = self.start_ip
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for i in range(s_byte_1, e_byte_1 + 1):
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sip = (i << 24) | (n_sip & 0xFFFFFF)
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eip = (i << 24) | 0xFFFFFF
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if eip < self.end_ip:
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n_sip = (i + 1) << 24
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else:
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eip = self.end_ip
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# append the new segment (maybe)
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t_list_1.append(Segment(sip, eip))
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# 2, split the segments with the second byte
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t_list_2 = []
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for s in t_list_1:
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base = s.start_ip & 0xFF000000
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n_sip = s.start_ip
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s_byte_2, e_byte_2 = (s.start_ip >> 16) & 0xFF, (s.end_ip >> 16) & 0xFF
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for i in range(s_byte_2, e_byte_2 + 1):
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sip = base | (i << 16) | (n_sip & 0xFFFF)
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eip = base | (i << 16) | 0xFFFF
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if eip < self.end_ip:
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n_sip = 0
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else:
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eip = self.end_ip
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t_list_2.append(Segment(sip, eip, self.region))
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return t_list_2
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def string(self) -> str:
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return util.long2ip(self.start_ip) + "|" + util.long2ip(self.end_ip) + "|" + self.region
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def segment_from(seg: str) -> Segment:
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segment = Segment()
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ps = seg.split("|", 3)
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if len(ps) != 3:
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return segment
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sip = util.checkip(ps[0])
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if sip == -1:
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return segment
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eip = util.checkip(ps[1])
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if eip == -1:
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return segment
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segment.start_ip, segment.end_ip = sip, eip
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segment.region = ps[2]
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return segment
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