TCP/IP Packet management

[alright21]

Find out a proper library to create and handle TCP/IP packets. Requirements:

• packet manipulation at a bit level
• the router must check the header of the packet to forward it
• fragmentation optional
• IPv6 optional

[alright21]

Findings

• https://libtins.github.io/
  • high level library to work with TCP packets easily
  • packet example: EthernetII pkt = EthernetII() / IP() / TCP() / RawPDU(BGP Packet bytes);
  • we can use the metho PDU.serialize() to transform the packet into a stream of bytes.
  • the library seem quite straightforward, so we do not need to implement everything. We just need to create the BGP part and serialze everything
• Manually implement packets
  • as Mirko team did
  • more control on the single packet
  • need to implement everything, also de/serialization
  • more effort. Is it worth it?

    Questions

• Define IP functionality: what do we need with that? Where do we need IP processing?
• Can we stop at IP layer or do we need to go with Ethernet?
• Do we implement fragmentation? (It should be already implemented, we just need to use it eventually)

[zanna-37]

We will probably have a go with PcapPlusPlus.