From afd14c9b67b6fb41219abf0dcd5e7fda37a1b8a9 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Mon, 16 Sep 2013 16:11:21 +0200
Subject: [PATCH] tuerd: Get peer information from socket

---
 tuerd | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tuerd b/tuerd
index 5884d13..f679fa8 100755
--- a/tuerd
+++ b/tuerd
@@ -1,7 +1,8 @@
 #!/usr/bin/python3
-import time, socket, os, stat, atexit, errno
+import time, socket, os, stat, atexit, errno, struct
 from datetime import datetime
 import RPi.GPIO as GPIO
+SO_PEERCRED = 17 # DO - NOT - TOUCH
 GPIO.setmode(GPIO.BOARD)
 
 # ******** definitions *********
@@ -89,7 +90,8 @@ sock.listen(1)
 while True:
 	# accept connections
 	conn, addr = sock.accept()
-	# TODO: use addr to determine the client for logging
+	# get peer information (TODO use it for logging)
+	(pid, uid, gid) = (struct.unpack('3i', conn.getsockopt(socket.SOL_SOCKET, SO_PEERCRED, struct.calcsize('3i'))))
 	# get some data from the client (enough to hold any valid command)
 	data = conn.recv (32)
 	# log the command
-- 
2.30.2