[Assorted-commits] SF.net SVN: assorted:[1510] python-commons/trunk/src/commons/networking.py

[<yan...@us...>]

Revision: 1510
          http://assorted.svn.sourceforge.net/assorted/?rev=1510&view=rev
Author:   yangzhang
Date:     2009-11-08 18:27:35 +0000 (Sun, 08 Nov 2009)

Log Message:
-----------
added inet_nltoa, inet_hltoa

Modified Paths:
--------------
    python-commons/trunk/src/commons/networking.py

Modified: python-commons/trunk/src/commons/networking.py
===================================================================
--- python-commons/trunk/src/commons/networking.py	2009-11-08 06:02:27 UTC (rev 1509)
+++ python-commons/trunk/src/commons/networking.py	2009-11-08 18:27:35 UTC (rev 1510)
@@ -5,11 +5,11 @@
 Networking tools.
 """
 
-import os, sys
+import os, socket, struct, sys
 from time import *
 from contextlib import contextmanager
 
-class NoMacAddrError( Exception ): pass
+class no_mac_addr_exception( Exception ): pass
 
 def get_mac_addr():
     """
@@ -36,7 +36,7 @@
                 mac = line.split()[4]
                 break
     if mac is None:
-        raise NoMacAddrError
+        raise no_mac_addr_exception
     return mac
 
 def retry_exp_backoff(initial_backoff, multiplier, func):
@@ -67,8 +67,14 @@
 
 @contextmanager
 def logout(x):
-    """
-    A context manager for finally calling the C{logout()} method of an object.
-    """
+    "A context manager for calling the C{logout()} method of an object."
     try: yield x
     finally: x.logout()
+
+def inet_nltoa(x):
+    "Convert an IPv4 address from an int in network byte order to a string."
+    return socket.inet_ntoa(struct.pack('>L', x))
+
+def inet_hltoa(x):
+    "Convert an IPv4 address from an int in host byte order to a string."
+    return socket.inet_ntoa(struct.pack('L', x))


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