mc36@p4emu:~$ uname -a ; sudo ./a.out 
Linux p4emu 6.15-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.15.4-1~exp1 (2025-06-28) x86_64 GNU/Linux
opening interface veth0
serving others
mc36@p4emu:~$ 

