changeset:   100091:0681f0a1fe6e
branch:      3.5
parent:      100089:c9423e481663
user:        Victor Stinner <victor.stinner@gmail.com>
date:        Thu Jan 28 15:41:01 2016 +0100
files:       Misc/NEWS Modules/socketmodule.c
description:
Windows: Decode hostname from ANSI code page

Issue #26227: On Windows, getnameinfo(), gethostbyaddr() and gethostbyname_ex()
functions of the socket module now decode the hostname from the ANSI code page
rather than UTF-8.


diff -r c9423e481663 -r 0681f0a1fe6e Misc/NEWS
--- a/Misc/NEWS	Thu Jan 28 12:42:26 2016 +0200
+++ b/Misc/NEWS	Thu Jan 28 15:41:01 2016 +0100
@@ -66,6 +66,10 @@
 Library
 -------
 
+- Issue #26227: On Windows, getnameinfo(), gethostbyaddr() and
+  gethostbyname_ex() functions of the socket module now decode the hostname
+  from the ANSI code page rather than UTF-8.
+
 - Issue #26147: xmlrpc now works with strings not encodable with used
   non-UTF-8 encoding.
 
diff -r c9423e481663 -r 0681f0a1fe6e Modules/socketmodule.c
--- a/Modules/socketmodule.c	Thu Jan 28 12:42:26 2016 +0200
+++ b/Modules/socketmodule.c	Thu Jan 28 15:41:01 2016 +0100
@@ -4519,6 +4519,19 @@
 Return the IP address (a string of the form '255.255.255.255') for a host.");
 
 
+static PyObject*
+sock_decode_hostname(const char *name)
+{
+#ifdef MS_WINDOWS
+    /* Issue #26227: gethostbyaddr() returns a string encoded
+     * to the ANSI code page */
+    return PyUnicode_DecodeFSDefault(name);
+#else
+    /* Decode from UTF-8 */
+    return PyUnicode_FromString(name);
+#endif
+}
+
 /* Convenience function common to gethostbyname_ex and gethostbyaddr */
 
 static PyObject *
@@ -4529,6 +4542,7 @@
     PyObject *name_list = (PyObject *)NULL;
     PyObject *addr_list = (PyObject *)NULL;
     PyObject *tmp;
+    PyObject *name;
 
     if (h == NULL) {
         /* Let's get real error message to return */
@@ -4637,7 +4651,10 @@
             goto err;
     }
 
-    rtn_tuple = Py_BuildValue("sOO", h->h_name, name_list, addr_list);
+    name = sock_decode_hostname(h->h_name);
+    if (name == NULL)
+        goto err;
+    rtn_tuple = Py_BuildValue("NOO", name, name_list, addr_list);
 
  err:
     Py_XDECREF(name_list);
@@ -5623,6 +5640,7 @@
     struct addrinfo hints, *res = NULL;
     int error;
     PyObject *ret = (PyObject *)NULL;
+    PyObject *name;
 
     flags = flowinfo = scope_id = 0;
     if (!PyArg_ParseTuple(args, "Oi:getnameinfo", &sa, &flags))
@@ -5686,7 +5704,11 @@
         set_gaierror(error);
         goto fail;
     }
-    ret = Py_BuildValue("ss", hbuf, pbuf);
+
+    name = sock_decode_hostname(hbuf);
+    if (name == NULL)
+        goto fail;
+    ret = Py_BuildValue("Ns", name, pbuf);
 
 fail:
     if (res)