upf-xdp

This program uses xdp to simply process gtpu packet.
It is just a toy, but it shows the possibility of using xdp to implement 5g upf.

Dependencies

libbpf
goebpf

Installation

sudo apt install libbpfcc-dev
go get github.com/dropbox/goebpf

Component

Usage

make
./main -h
   Usage of ./main:
     -elf string
        clang/llvm compiled binary file (default "upf.elf")
     -iface string
        Interface to bind XDP UPF N3/N6
     -n4addr string
        N4 server socket (default "127.0.0.1:8805")
     -test
        mock and testing (default true)
     -verbose
        Enable verbose mode with debug log messages

Discuss

Message routing can be forwarded directly through the xdp encapsulation layer 2 Ethernet frame without going through the protocol stack.
What is the number of tables supported by xdp?