Merge pull request #3709 from xiangxistu/master

Add lwIP 2.1.2 for RT-Thread

Author: BernardXiong

components/net/Kconfig

@@ -118,16 +118,17 @@ config RT_USING_LWIP
             config RT_USING_LWIP202
                 bool "lwIP v2.0.2"
 
-            config RT_USING_LWIP210
-                bool "lwIP v2.1.0"
+	    config RT_USING_LWIP212
+                bool "lwIP v2.1.2"
+
         endchoice
 
-        if (RT_USING_LWIP210 || RT_USING_LWIP202)
+        if (RT_USING_LWIP202 || RT_USING_LWIP212)
             config RT_USING_LWIP_IPV6
                 bool "IPV6 protocol"
                 default n
                 select NETDEV_USING_IPV6
-                select NETDEV_IPV6_SCOPES if RT_USING_LWIP210
+                select NETDEV_IPV6_SCOPES if RT_USING_LWIP212
         endif
 
         config RT_LWIP_IGMP

components/net/SConscript

@@ -8,7 +8,7 @@ cwd = GetCurrentDir()
 list = os.listdir(cwd)
 
 # the default version of LWIP is 2.0.2
-if not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202') and not GetDepend('RT_USING_LWIP210'):
+if not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202') and not GetDepend('RT_USING_LWIP212'):
     AddDepend('RT_USING_LWIP202')
 
 for d in list: