32 lines
1.1 KiB
Python
Executable File
32 lines
1.1 KiB
Python
Executable File
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# Ethernet / IP / TCP / Application
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#
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# Ethernet header: 14 bytes
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#
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# 0 5 6 11 12 14
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# | EthDHost | EthSHost | EthType |
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# | Ethernet Packet Data |
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# 0 3 4 7 8 15 16 31
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# | Version | IDL | Type of Service | Total Length |
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# | Identification | Flags | Fragment Offser |
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# | TTL | Protocol | Header Checksum |
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# | Source Address |
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# | Destination Address |
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# | Options | Padding |
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# Note here when interpreting: Network Byte Order is indicated by first byte (eg. Big-Endian)
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import struct # For packing/unpacking binary data
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print struct.pack("B", 1) # Packet as byte "B", little endian ordering here
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print struct.pack("H", 1) # Etc...
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print struct.pack(">H", 1) # Big endian ordering here because of ">"
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print struct.pack("!L", 1) # Unsigned long, 4 bytes, network byte format "!"
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struct.unpack("!L", "\x00\x00\x00\x01") # With the, computer unpacks "1"
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