From 0a30ad96c886aacf897b3e87cbdb24fb46c5c43d Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Mon, 16 Oct 2017 13:19:11 +1100
Subject: [PATCH] stm32/modusocket: Return OSError(-2) if getaddrinfo fails.

This matches the behaviour of getaddrinfo in extmod/modlwip.c.
---
 ports/stm32/modnwcc3k.c     | 2 +-
 ports/stm32/modnwwiznet5k.c | 2 +-
 ports/stm32/modusocket.c    | 1 -
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/ports/stm32/modnwcc3k.c b/ports/stm32/modnwcc3k.c
index 551206da8e..8cc0a613d1 100644
--- a/ports/stm32/modnwcc3k.c
+++ b/ports/stm32/modnwcc3k.c
@@ -125,7 +125,7 @@ STATIC int cc3k_gethostbyname(mp_obj_t nic, const char *name, mp_uint_t len, uin
 
     if (ip == 0) {
         // unknown host
-        return MP_ENOENT;
+        return -2;
     }
 
     out_ip[0] = ip >> 24;
diff --git a/ports/stm32/modnwwiznet5k.c b/ports/stm32/modnwwiznet5k.c
index a9e5f5aa91..9e9fb9aea6 100644
--- a/ports/stm32/modnwwiznet5k.c
+++ b/ports/stm32/modnwwiznet5k.c
@@ -92,7 +92,7 @@ STATIC int wiznet5k_gethostbyname(mp_obj_t nic, const char *name, mp_uint_t len,
         return 0;
     } else {
         // failure
-        return MP_ENOENT;
+        return -2;
     }
 }
 
diff --git a/ports/stm32/modusocket.c b/ports/stm32/modusocket.c
index 4d14c355f6..71a237b0d9 100644
--- a/ports/stm32/modusocket.c
+++ b/ports/stm32/modusocket.c
@@ -413,7 +413,6 @@ STATIC mp_obj_t mod_usocket_getaddrinfo(mp_obj_t host_in, mp_obj_t port_in) {
             if (nic_type->gethostbyname != NULL) {
                 int ret = nic_type->gethostbyname(nic, host, hlen, out_ip);
                 if (ret != 0) {
-                    // TODO CPython raises: socket.gaierror: [Errno -2] Name or service not known
                     mp_raise_OSError(ret);
                 }
                 have_ip = true;