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