Implement inet_ntop to support Windows XP

CREDITS

@@ -255,7 +255,7 @@ I: 492
 
 N: Jeff Tang
 W: https://github.com/mrjefftang
-I: 340, 529
+I: 340, 529, 616
 
 N: Yaolong Huang
 E: [email protected]

HISTORY.rst

@@ -22,6 +22,7 @@ Bug tracker at https://github.com/giampaolo/psutil/issues
   when running as a limited user.
 - #602: pre-commit GIT hook.
 - #629: enhanced support for py.test and nose test discovery and tests run.
+- #616: [Windows] Add inet_ntop function for Windows XP.
 
 **Bug fixes**
 

psutil/_psutil_windows.c

@@ -31,6 +31,7 @@
 #include "arch/windows/process_info.h"
 #include "arch/windows/process_handles.h"
 #include "arch/windows/ntextapi.h"
+#include "arch/windows/inet_ntop.h"
 
 #ifdef __MINGW32__
 #include "arch/windows/glpi.h"

psutil/arch/windows/inet_ntop.c

@@ -0,0 +1,24 @@
+#include "inet_ntop.h"
+
+// From: https://memset.wordpress.com/2010/10/09/inet_ntop-for-win32/
+PCSTR
+WSAAPI
+inet_ntop(
+    __in                                INT             Family,
+    __in                                PVOID           pAddr,
+    __out_ecount(StringBufSize)         PSTR            pStringBuf,
+    __in                                size_t          StringBufSize
+    )
+{
+    struct sockaddr_in srcaddr;
+
+    memset(&srcaddr, 0, sizeof(struct sockaddr_in));
+    memcpy(&(srcaddr.sin_addr), pAddr, sizeof(srcaddr.sin_addr));
+
+    srcaddr.sin_family = Family;
+    if (WSAAddressToString((struct sockaddr*) &srcaddr, sizeof(struct sockaddr_in), 0, pStringBuf, (LPDWORD) &StringBufSize) != 0) {
+        DWORD rv = WSAGetLastError();
+        return NULL;
+    }
+    return pStringBuf;
+}

psutil/arch/windows/inet_ntop.h

@@ -0,0 +1,10 @@
+#include <ws2tcpip.h>
+
+PCSTR
+WSAAPI
+inet_ntop(
+    __in                                INT             Family,
+    __in                                PVOID           pAddr,
+    __out_ecount(StringBufSize)         PSTR            pStringBuf,
+    __in                                size_t          StringBufSize
+    );

setup.py

@@ -70,6 +70,7 @@ def get_winver():
             'psutil/arch/windows/process_info.c',
             'psutil/arch/windows/process_handles.c',
             'psutil/arch/windows/security.c',
+            'psutil/arch/windows/inet_ntop.c',
         ],
         define_macros=[
             VERSION_MACRO,