43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
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# This file is part of Scapy
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# See http://www.secdev.org/projects/scapy for more information
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# Copyright (C) Parag Bhide
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# This program is published under GPLv2 license
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"""
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BFD - Bidirectional Forwarding Detection - RFC 5880, 5881
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"""
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# scapy.contrib.description = BFD
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# scapy.contrib.status = loads
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from scapy.packet import Packet, bind_layers, bind_bottom_up
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from scapy.fields import BitField, FlagsField, XByteField
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from scapy.layers.inet import UDP
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class BFD(Packet):
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name = "BFD"
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fields_desc = [
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BitField("version", 1, 3),
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BitField("diag", 0, 5),
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BitField("sta", 3, 2),
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FlagsField("flags", 0x00, 6, ['P', 'F', 'C', 'A', 'D', 'M']),
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XByteField("detect_mult", 0x03),
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XByteField("len", 24),
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BitField("my_discriminator", 0x11111111, 32),
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BitField("your_discriminator", 0x22222222, 32),
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BitField("min_tx_interval", 1000000000, 32),
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BitField("min_rx_interval", 1000000000, 32),
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BitField("echo_rx_interval", 1000000000, 32)]
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def mysummary(self):
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return self.sprintf(
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"BFD (my_disc=%BFD.my_discriminator%,"
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"your_disc=%BFD.my_discriminator%)"
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)
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bind_bottom_up(UDP, BFD, dport=3784)
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bind_bottom_up(UDP, BFD, sport=3784)
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bind_layers(UDP, BFD, sport=3784, dport=3784)
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