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Support Inband Flow Analyzer (IFA) #4234

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@jingfeihu

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@jingfeihu

Brief description

I would like to contribute Support Inband Flow Analyzer (IFA) to scapy.
Partly of the IFA layer has been implemented.
I hope everyone who are interested in this can join us to enhance it.

Inband Flow Analyzer (IFA)

References:
https://datatracker.ietf.org/doc/html/draft-kumar-ippm-ifa-07

Example Packet Format:
IFAoIPv4UDP = Ether/IP/IFA/UDP/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/Payload
IFAoIPv4TCP = Ether/IP/IFA/TCP/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/Payload
IFAoIPv4VxLAN = Ether/IP/IFA/UDP/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/VXLAN/Ether/IP/TCP/Payload
IFAoIPv4GRE = Ether/IP/IFA/GRE/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/Ether/IP/TCP/Payload
IFAoIPv6UDP = Ether/IPv6/IFA/UDP/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/Payload
IFAoIPv6TCP = Ether/IPv6/IFA/TCP/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/Payload
IFAoIPv6VxLAN = Ether/IPv6/IFA/UDP/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/VXLAN/Ether/IP/TCP/Payload
IFAoIPv6GRE = Ether/IPv6/IFA/GRE/IFAMetaHdr/IFAMetaHop/.../IFAMetaHop/Ether/IP/TCP/Payload

Scapy version

2.5.0

Python version

3.7

Operating system

Linux 5.10.27-051027-generic

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