Switch the IPv4 parser to the one recently introduced in libservice. Return a bool value on wether parsing of the IPv4 address string was successful

features/netsocket/SocketAddress.cpp

@@ -24,6 +24,26 @@
 
 
 
+static bool ipv6_is_valid(const char *addr)
+{
+    // Check each digit for [0-9a-fA-F:]
+    // Must also have at least 2 colons
+    int colons = 0;
+    for (int i = 0; addr[i]; i++) {
+        if (!(addr[i] >= '0' && addr[i] <= '9') &&
+                !(addr[i] >= 'a' && addr[i] <= 'f') &&
+                !(addr[i] >= 'A' && addr[i] <= 'F') &&
+                addr[i] != ':') {
+            return false;
+        }
+        if (addr[i] == ':') {
+            colons++;
+        }
+    }
+
+    return colons >= 2;
+}
+
 SocketAddress::SocketAddress(nsapi_addr_t addr, uint16_t port)
 {
     _ip_address = NULL;
@@ -62,6 +82,7 @@ bool SocketAddress::set_ip_address(const char *addr)
         return true;
     } else if (addr && stoip6(addr, strlen(addr), _addr.bytes)) {
         _addr.version = NSAPI_IPv6;
+        stoip6(addr, strlen(addr), _addr.bytes);
         return true;
     } else {
         _addr = nsapi_addr_t();