From abd25f9bb3197f1c934120c500b51b07e9890a86 Mon Sep 17 00:00:00 2001
From: Christopher Haster <chaster@utexas.edu>
Date: Wed, 20 Apr 2016 03:22:31 -0500
Subject: [PATCH] Added workaround for bug in newlib sscanf

https://bugs.launchpad.net/gcc-arm-embedded/+bug/1399224
---
 SocketAddress.cpp | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/SocketAddress.cpp b/SocketAddress.cpp
index f238c883d8..933f851731 100644
--- a/SocketAddress.cpp
+++ b/SocketAddress.cpp
@@ -56,7 +56,23 @@ static bool ipv6_is_valid(const char *addr)
 
 static void ipv4_from_address(uint8_t *bytes, const char *addr)
 {
-    sscanf(addr, "%hhu.%hhu.%hhu.%hhu", &bytes[0], &bytes[1], &bytes[2], &bytes[3]);
+    int count = 0;
+    int i = 0;
+
+    for (; count < NSAPI_IPv4_BYTES; count++) {
+        int scanned = sscanf(&addr[i], "%hhu", &bytes[count]);
+        if (scanned < 1) {
+            return;
+        }
+
+        for (; addr[i] != '.'; i++) {
+            if (!addr[i]) {
+                return;
+            }
+        }
+
+        i++;
+    }
 }
 
 static int ipv6_scan_chunk(uint16_t *shorts, const char *chunk) {