From: bggardner <brent@ebrent.net>
Date: Thu, 12 Sep 2019 10:02:48 +0000 (-0400)
Subject: closes bpo-37405: Make socket.getsockname() always return a tuple for AF_CAN. (GH... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=954900a3f98a8c0dea14dd575490237f3f8626b3;p=python

closes bpo-37405: Make socket.getsockname() always return a tuple for AF_CAN. (GH-14392)

This fixes a regression from 3.5. In recent releases, `getsockname()` in the AF_CAN case has returned a string.
---

diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index b855c523f0..b74549024b 100755
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -1948,7 +1948,9 @@ class BasicCANTest(unittest.TestCase):
 
     def testBindAny(self):
         with socket.socket(socket.PF_CAN, socket.SOCK_RAW, socket.CAN_RAW) as s:
-            s.bind(('', ))
+            address = ('', )
+            s.bind(address)
+            self.assertEqual(s.getsockname(), address)
 
     def testTooLongInterfaceName(self):
         # most systems limit IFNAMSIZ to 16, take 1024 to be sure
diff --git a/Misc/NEWS.d/next/Library/2019-09-11-20-27-41.bpo-37405.MG5xiY.rst b/Misc/NEWS.d/next/Library/2019-09-11-20-27-41.bpo-37405.MG5xiY.rst
new file mode 100644
index 0000000000..09e1097342
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-09-11-20-27-41.bpo-37405.MG5xiY.rst
@@ -0,0 +1,2 @@
+Fixed regression bug for socket.getsockname() for non-CAN_ISOTP AF_CAN
+address family sockets by returning a 1-tuple instead of string.
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 3548b0c878..c649fa3c98 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -1563,7 +1563,7 @@ makesockaddr(SOCKET_T sockfd, struct sockaddr *addr, size_t addrlen, int proto)
 #endif /* CAN_ISOTP */
           default:
           {
-              return Py_BuildValue("O&", PyUnicode_DecodeFSDefault,
+              return Py_BuildValue("(O&)", PyUnicode_DecodeFSDefault,
                                         ifname);
           }
         }