From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sat, 4 Nov 2017 07:37:32 +0000 (+0200)
Subject: bpo-9678: Fix determining the MAC address in the uuid module. (#4264)
X-Git-Tag: v3.7.0a3~248
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ee1a9a2b78d5b6bb1a8148fc5fcf365e6d4e9e67;p=thirdparty%2FPython%2Fcpython.git

bpo-9678: Fix determining the MAC address in the uuid module. (#4264)

* Using ifconfig on NetBSD and OpenBSD.
* Using arp on Linux, FreeBSD, NetBSD and OpenBSD.

Based on patch by Takayuki Shimizukawa.
---

diff --git a/Lib/uuid.py b/Lib/uuid.py
index 3123ff88a16b..020c6e73c863 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -370,8 +370,9 @@ def _find_mac(command, args, hw_identifiers, get_index):
 def _ifconfig_getnode():
     """Get the hardware address on Unix by running ifconfig."""
     # This works on Linux ('' or '-a'), Tru64 ('-av'), but not all Unixes.
+    keywords = (b'hwaddr', b'ether', b'address:', b'lladdr')
     for args in ('', '-a', '-av'):
-        mac = _find_mac('ifconfig', args, [b'hwaddr', b'ether'], lambda i: i+1)
+        mac = _find_mac('ifconfig', args, keywords, lambda i: i+1)
         if mac:
             return mac
 
@@ -391,7 +392,20 @@ def _arp_getnode():
         return None
 
     # Try getting the MAC addr from arp based on our IP address (Solaris).
-    return _find_mac('arp', '-an', [os.fsencode(ip_addr)], lambda i: -1)
+    mac = _find_mac('arp', '-an', [os.fsencode(ip_addr)], lambda i: -1)
+    if mac:
+        return mac
+
+    # This works on OpenBSD
+    mac = _find_mac('arp', '-an', [os.fsencode(ip_addr)], lambda i: i+1)
+    if mac:
+        return mac
+
+    # This works on Linux, FreeBSD and NetBSD
+    mac = _find_mac('arp', '-an', [os.fsencode('(%s)' % ip_addr)],
+                    lambda i: i+2)
+    if mac:
+        return mac
 
 def _lanscan_getnode():
     """Get the hardware address on Unix by running lanscan."""
diff --git a/Misc/NEWS.d/next/Library/2017-11-03-22-05-47.bpo-9678.oD51q6.rst b/Misc/NEWS.d/next/Library/2017-11-03-22-05-47.bpo-9678.oD51q6.rst
new file mode 100644
index 000000000000..683a2de89bfd
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2017-11-03-22-05-47.bpo-9678.oD51q6.rst
@@ -0,0 +1,6 @@
+Fixed determining the MAC address in the uuid module:
+
+* Using ifconfig on NetBSD and OpenBSD.
+* Using arp on Linux, FreeBSD, NetBSD and OpenBSD.
+
+Based on patch by Takayuki Shimizukawa.