WiFi: Add IPStackInterface abstraction for IP stacks

features/net/FEATURE_IPV4/lwip-interface/EthernetInterface.cpp

@@ -21,7 +21,7 @@
 /* Interface implementation */
 int EthernetInterface::connect()
 {
-    return lwip_bringup();
+    return lwip_bringup(NULL);
 }
 
 int EthernetInterface::disconnect()

features/net/FEATURE_IPV4/lwip-interface/LWIPIPStack.cpp

@@ -0,0 +1,40 @@
+/* LWIPIPStackInterface
+ * Copyright (c) 2015 - 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "IPStackInterface.h"
+#include "lwip_stack.h"
+
+/** LWIP specific implementation of IPStackInterface */
+
+void IPStackInterface::bringup(emac_interface_t *emac)
+{
+    lwip_bringup(emac);
+}
+
+void IPStackInterface::bringdown()
+{
+    lwip_bringdown();
+}
+
+const char * IPStackInterface::get_mac_address()
+{
+    return lwip_get_mac_address();
+}
+
+const char * IPStackInterface::get_ip_address()
+{
+    return lwip_get_ip_address();
+}

features/net/FEATURE_IPV4/lwip-interface/lwip_stack.c

@@ -30,6 +30,7 @@
 #include "lwip/tcp.h"
 #include "lwip/ip.h"
 
+#include "emac_api.h"
 
 /* Static arena of sockets */
 static struct lwip_socket {
@@ -142,7 +143,7 @@ const char *lwip_get_ip_address(void)
     return lwip_ip_addr[0] ? lwip_ip_addr : 0;
 }
 
-int lwip_bringup(void)
+int lwip_bringup(emac_interface_t *emac)
 {
     // Check if we've already connected
     if (!lwip_get_mac_address()) {
@@ -158,7 +159,7 @@ int lwip_bringup(void)
 
         memset(&lwip_netif, 0, sizeof lwip_netif);
 #if DEVICE_EMAC
-        netif_add(&lwip_netif, 0, 0, 0, &emac_if, emac_lwip_if_init, tcpip_input);
+        netif_add(&lwip_netif, 0, 0, 0, emac, emac_lwip_if_init, tcpip_input);
 #else /* DEVICE_EMAC */
         netif_add(&lwip_netif, 0, 0, 0, NULL, eth_arch_enetif_init, tcpip_input);
 #endif /* DEVICE_EMAC */

features/net/FEATURE_IPV4/lwip-interface/lwip_stack.h

@@ -18,14 +18,15 @@
 #define LWIP_STACK_H
 
 #include "nsapi.h"
+#include "emac_api.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 
 // Access to lwip through the nsapi
-int lwip_bringup(void);
+int lwip_bringup(emac_interface_t *emac);
 void lwip_bringdown(void);
 
 extern nsapi_stack_t lwip_stack;

features/net/network-socket/IPStackInterface.h

@@ -0,0 +1,57 @@
+/* IPStackInterface
+ * Copyright (c) 2015 - 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef IP_STACK_INTERFACE_H
+#define IP_STACK_INTERFACE_H
+
+#include "emac_api.h"
+
+/**
+ * IPStackInterface
+ *
+ * Abstraction class on top of IP stack, enables WiFiInterface implementation to setup IP stack
+ */
+class IPStackInterface
+{
+public:
+    /**
+     * Brings up the IP stack using provided @a emac interface
+     *
+     * @param emac Emack backend to use
+     */
+    virtual void bringup(emac_interface_t *emac);
+
+    /**
+     * Brings down the IP stack
+     */
+    virtual void bringdown();
+
+    /**
+     * Returns  MAC address
+     *
+     * @return MAC address in "00:11:22:33:44:55" form
+     */
+    virtual const char *get_mac_address();
+
+    /**
+     * Returns interfaces IP address
+     *
+     * @return IP address in "10.11.12.13" form
+     */
+    virtual const char *get_ip_address();
+};
+
+#endif /* IP_STACK_INTERFACE_H */