Get client and server ip and port from openbsd-inetd/tcpd

pytcpd.py

#!/usr/bin/python3

# pytcpd.py
#
# get server ip:port and client ip:port from openbsd-inetd/tcpd
# this can be used as the start of a nowait tcp daemon that needs to be aware
# of the underlying network 
#
# Stephanie Sunshine 2021 -- MIT License

import sys
import socket

# socket.AF_INET6 for IPV6
# socket.SOCK_DGRAM for UDP

sock = socket.fromfd(sys.stdin.fileno(), socket.AF_INET, socket.SOCK_STREAM)
print(f"connected: {sock.getpeername()} => {sock.getsockname()}")