Nanostack changes for PPP service

Created PPP interface for PPP service. Re-used the ethernet tasklet
and PHY driver structure for PPP.

features/nanostack/mbed-mesh-api/mbed-mesh-api/MeshInterfaceNanostack.h

@@ -34,7 +34,10 @@ public:
 
     void get_mac_address(uint8_t *buf) const
     {
-        interface_phy.get_mac_address(buf);
+        NanostackMACPhy *phy = interface_phy.nanostack_mac_phy();
+        if (phy) {
+            phy->get_mac_address(buf);
+        }
     }
 
     /**

features/nanostack/mbed-mesh-api/mbed-mesh-api/NanostackPPPInterface.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2019 ARM Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ * 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 NANOSTACKPPPINTERFACE_H
+#define NANOSTACKPPPINTERFACE_H
+
+#include "MeshInterfaceNanostack.h"
+#include "PPPInterface.h"
+#include "NanostackPPPPhy.h"
+
+class Nanostack::PPPInterface : public Nanostack::Interface {
+public:
+    virtual nsapi_error_t bringup(bool dhcp, const char *ip,
+                                  const char *netmask, const char *gw,
+                                  nsapi_ip_stack_t stack = DEFAULT_STACK,
+                                  bool blocking = true);
+    virtual nsapi_error_t bringdown();
+
+    typedef mbed::Callback<void (uint8_t up, int8_t device_id)> link_state_cb_t;
+    virtual void set_link_state_changed_callback(link_state_cb_t link_state_cb);
+
+private:
+    friend class Nanostack;
+    PPPInterface(NanostackPhy &phy) : Interface(phy), link_state_up(false), enet_tasklet_connected(false) {}
+    nsapi_error_t initialize();
+    void link_state_changed(bool up);
+    nsapi_error_t connect_enet_tasklet();
+    link_state_cb_t link_state_cb;
+    bool link_state_up;
+    bool enet_tasklet_connected;
+};
+
+#endif

features/nanostack/mbed-mesh-api/source/NanostackPPPInterface.cpp

@@ -0,0 +1,386 @@
+/*
+ * Copyright (c) 2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "NanostackPPPInterface.h"
+#include "NanostackPPPPhy.h"
+#include "PPP.h"
+#include "nsdynmemLIB.h"
+#include "arm_hal_phy.h"
+#include "mbed_interface.h"
+#include "mesh_system.h"
+#include "callback_handler.h"
+#include "enet_tasklet.h"
+#include "ip6string.h"
+
+class PPPPhy : public NanostackPPPPhy {
+public:
+    PPPPhy(NanostackMemoryManager &mem, PPP &m);
+    virtual int8_t phy_register();
+
+    virtual void phy_power_on();
+    virtual void phy_power_off();
+
+    virtual void get_iid64(uint8_t *iid64);
+    virtual uint16_t get_mtu();
+
+    virtual void set_link_state_change_cb(link_state_change_cb_t cb);
+
+    int8_t tx(uint8_t *data_ptr, uint16_t data_len, uint8_t tx_handle, data_protocol_e data_flow);
+
+    void ppp_phy_rx(net_stack_mem_buf_t *mem);
+    void link_state_cb(bool up);
+
+private:
+    NanostackMemoryManager &memory_manager;
+    PPP &ppp;
+    uint8_t iid64[8];
+    link_state_change_cb_t link_state_change_cb;
+    bool active;
+    bool powered_up;
+    int8_t device_id;
+    phy_device_driver_s phy;
+};
+
+nsapi_error_t Nanostack::PPPInterface::initialize()
+{
+    nanostack_lock();
+
+    if (register_phy() < 0) {
+        nanostack_unlock();
+        return NSAPI_ERROR_DEVICE_ERROR;
+    }
+
+    nanostack_unlock();
+
+    return NSAPI_ERROR_OK;
+}
+
+nsapi_error_t Nanostack::PPPInterface::bringup(bool dhcp, const char *ip,
+                                               const char *netmask, const char *gw,
+                                               nsapi_ip_stack_t stack, bool blocking)
+{
+    if (stack == IPV4_STACK) {
+        return NSAPI_ERROR_UNSUPPORTED;
+    }
+
+    _blocking = blocking;
+
+    if (link_state_up) {
+        connect_enet_tasklet();
+    }
+
+    if (blocking) {
+        uint8_t retries = 10;
+        while (_connect_status != NSAPI_STATUS_GLOBAL_UP) {
+            int32_t count = connect_semaphore.try_acquire_for(3000);
+            if (count <= 0 && retries-- == 0) {
+                return NSAPI_ERROR_DHCP_FAILURE; // sort of...
+            }
+            // Not up until global up
+            if (_connect_status == NSAPI_STATUS_LOCAL_UP) {
+                _connect_status = NSAPI_STATUS_CONNECTING;
+            }
+        }
+    }
+
+    return NSAPI_ERROR_OK;
+}
+
+nsapi_error_t Nanostack::PPPInterface::connect_enet_tasklet()
+{
+    if (enet_tasklet_connected) {
+        return NSAPI_ERROR_OK;
+    }
+
+    enet_tasklet_connected = true;
+
+    nanostack_lock();
+
+    if (interface_id < 0) {
+        enet_tasklet_init();
+        __mesh_handler_set_callback(this);
+        interface_id = enet_tasklet_ppp_network_init(_device_id);
+    }
+    int8_t status = -1;
+    if (interface_id >= 0) {
+        status = enet_tasklet_connect(&__mesh_handler_c_callback, interface_id);
+    }
+
+    nanostack_unlock();
+
+    if (status == -1) {
+        return NSAPI_ERROR_DEVICE_ERROR;
+    } else if (status == -2) {
+        return NSAPI_ERROR_NO_MEMORY;
+    } else if (status == -3) {
+        return NSAPI_ERROR_ALREADY;
+    } else if (status != 0) {
+        return NSAPI_ERROR_DEVICE_ERROR;
+    }
+
+    return NSAPI_ERROR_OK;
+}
+
+nsapi_error_t Nanostack::PPPInterface::bringdown()
+{
+    nanostack_lock();
+    int8_t status = enet_tasklet_disconnect(true);
+    enet_tasklet_connected = false;
+    nanostack_unlock();
+
+    if (status == -1) {
+        return NSAPI_ERROR_DEVICE_ERROR;
+    } else if (status == -2) {
+        return NSAPI_ERROR_NO_MEMORY;
+    } else if (status == -3) {
+        return NSAPI_ERROR_ALREADY;
+    } else if (status != 0) {
+        return NSAPI_ERROR_DEVICE_ERROR;
+    }
+
+    if (_blocking) {
+        int32_t count = disconnect_semaphore.try_acquire_for(30000);
+
+        if (count <= 0) {
+            return NSAPI_ERROR_TIMEOUT;
+        }
+    }
+    return NSAPI_ERROR_OK;
+}
+
+void Nanostack::PPPInterface::link_state_changed(bool up)
+{
+    link_state_up = up;
+
+    // If application callback is set
+    if (link_state_cb) {
+        link_state_cb(up, _device_id);
+    } else {
+        if (up) {
+            connect_enet_tasklet();
+        }
+    }
+}
+
+void Nanostack::PPPInterface::set_link_state_changed_callback(link_state_cb_t new_link_state_cb)
+{
+    link_state_cb = new_link_state_cb;
+}
+
+// GAH! no handles on the callback. Force a single interface
+static PPPPhy *single_phy;
+
+extern "C"
+{
+    static int8_t ppp_phy_interface_state_control(phy_interface_state_e, uint8_t)
+    {
+        return -1;
+    }
+
+    static int8_t ppp_phy_tx(uint8_t *data_ptr, uint16_t data_len, uint8_t tx_handle, data_protocol_e data_flow)
+    {
+        return single_phy->tx(data_ptr, data_len, tx_handle, data_flow);
+    }
+
+    PPPPhy::PPPPhy(NanostackMemoryManager &mem, PPP &m) : memory_manager(mem), ppp(m), link_state_change_cb(NULL), active(false), powered_up(false), device_id(-1)
+    {
+    }
+
+    void PPPPhy::ppp_phy_rx(net_stack_mem_buf_t *mem)
+    {
+        if (!active) {
+            memory_manager.free(mem);
+            return;
+        }
+
+        const uint8_t *ptr = NULL;
+        uint8_t *tmpbuf = NULL;
+        uint32_t total_len;
+
+        if (memory_manager.get_next(mem) == NULL) {
+            // Easy contiguous case
+            ptr = static_cast<const uint8_t *>(memory_manager.get_ptr(mem));
+            total_len = memory_manager.get_len(mem);
+        } else {
+            // Nanostack can't accept chunked data - make temporary contiguous copy
+            total_len = memory_manager.get_total_len(mem);
+            ptr = tmpbuf = static_cast<uint8_t *>(ns_dyn_mem_temporary_alloc(total_len));
+            if (tmpbuf) {
+                memory_manager.copy_from_buf(tmpbuf, total_len, mem);
+            }
+        }
+
+        if (ptr && phy.phy_rx_cb) {
+            phy.phy_rx_cb(ptr, total_len, 0xff, 0, device_id);
+        }
+        ns_dyn_mem_free(tmpbuf);
+        memory_manager.free(mem);
+    }
+
+} // extern "C"
+
+int8_t PPPPhy::tx(uint8_t *data_ptr, uint16_t data_len, uint8_t tx_handle, data_protocol_e data_flow)
+{
+    if (!active) {
+        return -1;
+    }
+
+    net_stack_mem_buf_t *mem = memory_manager.alloc_pool(data_len, 0);
+    if (!mem) {
+        return -1;
+    }
+    memory_manager.copy_to_buf(mem, data_ptr, data_len);
+
+    // They take ownership - their responsibility to free
+    ppp.link_out(mem, IPV6_STACK);
+
+    return 0;
+}
+
+int8_t PPPPhy::phy_register()
+{
+    active = true;
+
+    if (device_id < 0) {
+        phy.PHY_MAC = iid64;
+        phy.address_write = NULL;
+        phy.driver_description = const_cast<char *>("PPP");
+        phy.link_type = PHY_LINK_PPP;
+        phy.phy_MTU = 0;
+        phy.phy_header_length = 0;
+        phy.phy_tail_length = 0;
+        phy.state_control = ppp_phy_interface_state_control;
+        phy.tx = ppp_phy_tx;
+        phy.phy_rx_cb = NULL;
+        phy.phy_tx_done_cb = NULL;
+
+        ppp.set_memory_manager(memory_manager);
+        ppp.set_link_input_cb(mbed::callback(this, &PPPPhy::ppp_phy_rx));
+        if (link_state_change_cb) {
+            ppp.set_link_state_cb(mbed::callback(this, &PPPPhy::link_state_cb));
+        }
+
+        device_id = arm_net_phy_register(&phy);
+
+        if (device_id < 0) {
+            return -1;
+        }
+    }
+
+    return device_id;
+}
+
+void PPPPhy::phy_power_on()
+{
+    if (!powered_up) {
+        if (!ppp.power_up()) {
+            return;
+        }
+        phy.phy_MTU = get_mtu();
+        powered_up = true;
+        active = true;
+    }
+}
+
+void PPPPhy::phy_power_off()
+{
+    if (powered_up) {
+        ppp.power_down();
+        powered_up = false;
+    }
+    active = false;
+}
+
+void PPPPhy::set_link_state_change_cb(link_state_change_cb_t cb)
+{
+    link_state_change_cb = cb;
+}
+
+void PPPPhy::link_state_cb(bool up)
+{
+    // Read negotiated parameters from PPP
+    if (up) {
+        get_iid64(iid64);
+    }
+
+    // Call upper level callback if set
+    if (link_state_change_cb) {
+        link_state_change_cb(up);
+    }
+}
+
+void PPPPhy::get_iid64(uint8_t *iid64)
+{
+    if (!iid64) {
+        return;
+    }
+
+    // Read link local IPv6 address
+    const nsapi_addr_t *ipv6_ll_addr = ppp.get_ip_address(NSAPI_IPv6);
+    if (ipv6_ll_addr) {
+        memcpy(iid64, &ipv6_ll_addr->bytes[8], 8);
+    }
+}
+
+uint16_t PPPPhy::get_mtu()
+{
+    return ppp.get_mtu_size();
+}
+
+nsapi_error_t Nanostack::add_ppp_interface(PPP &ppp, bool default_if, Nanostack::PPPInterface **interface_out)
+{
+    if (!single_phy) {
+        single_phy = new (std::nothrow) PPPPhy(this->memory_manager, ppp);
+        if (!single_phy) {
+            return NSAPI_ERROR_NO_MEMORY;
+        }
+    }
+
+    static Nanostack::PPPInterface *interface = NULL;
+
+    if (interface == NULL) {
+        interface = new (std::nothrow) Nanostack::PPPInterface(*single_phy);
+        if (!interface) {
+            return NSAPI_ERROR_NO_MEMORY;
+        }
+
+        single_phy->set_link_state_change_cb(mbed::callback(interface, &Nanostack::PPPInterface::link_state_changed));
+    }
+
+    interface->initialize();
+
+    single_phy->phy_power_on();
+
+    *interface_out = interface;
+
+    return NSAPI_ERROR_OK;
+}
+
+nsapi_error_t Nanostack::add_ppp_interface(PPP &ppp, bool default_if, OnboardNetworkStack::Interface **interface_out)
+{
+    Nanostack::PPPInterface *interface;
+    nsapi_error_t err = add_ppp_interface(ppp, default_if, &interface);
+    *interface_out = interface;
+    return err;
+}
+
+nsapi_error_t Nanostack::remove_ppp_interface(OnboardNetworkStack::Interface **interface_out)
+{
+    single_phy->phy_power_off();
+
+    return NSAPI_ERROR_OK;
+}

features/nanostack/mbed-mesh-api/source/ethernet_tasklet.c

@@ -335,6 +335,41 @@ int8_t enet_tasklet_network_init(int8_t device_id)
     return tasklet_data_ptr->network_interface_id;
 }
 
+/* For now, to enable to compile without Nanostack interface changes, enables Nanostack PPP
+   interface only if default stack is Nanostack and interface cellular. After Nanostack
+   with updated interface call arm_nwk_interface_ppp_init() is integrated to mbed-os, this
+   flagging can be removed.
+*/
+#define NANOSTACK   0x11991199
+#define CELLULAR    0x22992299
+#if MBED_CONF_NSAPI_DEFAULT_STACK == NANOSTACK && MBED_CONF_TARGET_NETWORK_DEFAULT_INTERFACE_TYPE == CELLULAR
+#define ENABLE_NANOSTACK_PPP
+#endif
+#undef NANOSTACK
+#undef CELLULAR
+
+int8_t enet_tasklet_ppp_network_init(int8_t device_id)
+{
+#ifdef ENABLE_NANOSTACK_PPP
+    if (tasklet_data_ptr->network_interface_id != -1) {
+        tr_debug("Interface already at active state\n");
+        return tasklet_data_ptr->network_interface_id;
+    }
+    if (!eth_mac_api) {
+        eth_mac_api = ethernet_mac_create(device_id);
+    }
+
+    tasklet_data_ptr->network_interface_id = arm_nwk_interface_ppp_init(eth_mac_api, "ppp0");
+
+    tr_debug("interface ID: %d", tasklet_data_ptr->network_interface_id);
+    arm_nwk_interface_configure_ipv6_bootstrap_set(
+        tasklet_data_ptr->network_interface_id, NET_IPV6_BOOTSTRAP_AUTONOMOUS, NULL);
+    return tasklet_data_ptr->network_interface_id;
+#else
+    return -1;
+#endif
+}
+
 void enet_tasklet_link_state_changed(bool up)
 {
     if (up) {

features/nanostack/mbed-mesh-api/source/include/enet_tasklet.h

@@ -36,6 +36,14 @@ void enet_tasklet_init(void);
  */
 int8_t enet_tasklet_network_init(int8_t device_id);
 
+/*
+ * \brief Create PPP network interface.
+ *
+ * \param device_id Registered physical device.
+ * \return interface ID used to communication with this interface.
+ */
+int8_t enet_tasklet_ppp_network_init(int8_t device_id);
+
 /*
  * \brief Connect to Ethernet network.
  *

features/nanostack/nanostack-interface/Nanostack.h

@@ -37,6 +37,7 @@ public:
     class LoWPANNDInterface;
     class ThreadInterface;
     class WisunInterface;
+    class PPPInterface;
 
     /* Implement OnboardNetworkStack method */
     virtual nsapi_error_t add_ethernet_interface(EMAC &emac, bool default_if, OnboardNetworkStack::Interface **interface_out);
@@ -44,6 +45,13 @@ public:
     /* Local variant with stronger typing and manual address specification */
     nsapi_error_t add_ethernet_interface(EMAC &emac, bool default_if, Nanostack::EthernetInterface **interface_out, const uint8_t *mac_addr = NULL);
 
+    virtual nsapi_error_t add_ppp_interface(PPP &ppp, bool default_if, OnboardNetworkStack::Interface **interface_out);
+
+    /* Local variant with stronger typing and manual address specification */
+    nsapi_error_t add_ppp_interface(PPP &ppp, bool default_if, Nanostack::PPPInterface **interface_out);
+
+    nsapi_error_t remove_ppp_interface(OnboardNetworkStack::Interface **interface_out);
+
 protected:
 
     Nanostack();

features/nanostack/nanostack-interface/NanostackEthernetPhy.h

@@ -18,10 +18,10 @@
 #ifndef NANOSTACK_ETHERNET_PHY_H_
 #define NANOSTACK_ETHERNET_PHY_H_
 
-#include "NanostackPhy.h"
+#include "NanostackMACPhy.h"
 
 /** Ethernet PHY driver class for Nanostack */
-class NanostackEthernetPhy : public NanostackPhy {
+class NanostackEthernetPhy : public NanostackMACPhy {
 };
 
 #endif /* NANOSTACK_INTERFACE_H_ */

features/nanostack/nanostack-interface/NanostackInterface.h

@@ -23,6 +23,7 @@
 #include "LoWPANNDInterface.h"
 #include "ThreadInterface.h"
 #include "NanostackEthernetInterface.h"
+#include "NanostackPPPInterface.h"
 #include "MeshInterfaceNanostack.h"
 #include "WisunInterface.h"
 #endif /* NANOSTACK_INTERFACE_H_ */

features/nanostack/nanostack-interface/NanostackMACPhy.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2019, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 NANOSTACK_MACPHY_H_
+#define NANOSTACK_MACPHY_H_
+
+#include "NanostackPhy.h"
+
+/** MAC PHY driver class for Nanostack */
+class NanostackMACPhy : public NanostackPhy {
+public:
+    /** Read the mac address of this physical interface
+     *
+     *  Note - some devices do not have a mac address
+     *         in hardware.
+     *
+     *  @param mac      mac address
+     */
+    virtual void get_mac_address(uint8_t *mac) = 0;
+
+    /** Set the mac address of this physical interface
+     *
+     *  @param mac      mac address
+     */
+    virtual void set_mac_address(uint8_t *mac) = 0;
+
+    /** Provide access to the NanostackMACPhy
+     *
+     *  @return          NanostackMACPhy
+     */
+    virtual NanostackMACPhy *nanostack_mac_phy()
+    {
+        return this;
+    }
+};
+
+#endif /* NANOSTACK_MACPHY_H_ */

features/nanostack/nanostack-interface/NanostackPPPPhy.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2019, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 NANOSTACK_PPP_PHY_H_
+#define NANOSTACK_PPP_PHY_H_
+
+#include "NanostackPhy.h"
+/** PPP PHY driver class for Nanostack */
+class NanostackPPPPhy : public NanostackPhy {
+public:
+    /** Link state callback function prototype
+     *
+     *  @param up       link up
+     */
+    typedef mbed::Callback<void (bool up)> link_state_change_cb_t;
+
+    /** Set link state callback of this physical interface
+     *
+     *  @param cb       callback
+     */
+    virtual void set_link_state_change_cb(link_state_change_cb_t cb) = 0;
+
+    /** Read the iid64 address of this physical interface
+     *
+     *  @param iid64    iid64 address
+     */
+    virtual void get_iid64(uint8_t *iid64) = 0;
+
+    /** Read the mtu of this physical interface
+     *
+     * @return          mtu
+     */
+    virtual uint16_t get_mtu() = 0;
+
+    /** Provide access to the NanostackMACPhy
+     *
+     * @return          NanostackPPPPhy
+     */
+    virtual NanostackPPPPhy *nanostack_ppp_phy()
+    {
+        return this;
+    }
+};
+
+#endif /* NANOSTACK_PPP_PHY_H_ */

features/nanostack/nanostack-interface/NanostackPhy.h

@@ -18,6 +18,9 @@
 #ifndef NANOSTACK_PHY_H_
 #define NANOSTACK_PHY_H_
 
+class NanostackMACPhy;
+class NanostackPPPPhy;
+
 /** PHY driver class for Nanostack */
 class NanostackPhy {
 public:
@@ -29,17 +32,25 @@ public:
      */
     virtual int8_t phy_register() = 0;
 
-    /** Read the mac address of this physical interface
+    /** Return pointer to a NanostackMACPhy.
      *
-     * Note - some devices do not have a mac address
-     *        in hardware.
+     *  @return         Pointer to requested phy type or NULL if this
+     *                  class doesn't implement the phy.
      */
-    virtual void get_mac_address(uint8_t *mac) = 0;
+    virtual NanostackMACPhy *nanostack_mac_phy()
+    {
+        return 0;
+    }
 
-    /** Set the mac address of this physical interface
+    /** Return pointer to a NanostackPPPPhy.
      *
+     *  @return         Pointer to requested phy type or NULL if this
+     *                  class doesn't implement the phy.
      */
-    virtual void set_mac_address(uint8_t *mac) = 0;
+    virtual NanostackPPPPhy *nanostack_ppp_phy()
+    {
+        return 0;
+    }
 
 protected:
     NanostackPhy() {}

features/nanostack/nanostack-interface/NanostackRfPhy.h

@@ -18,10 +18,10 @@
 #ifndef NANOSTACK_RF_PHY_H_
 #define NANOSTACK_RF_PHY_H_
 
-#include "NanostackPhy.h"
+#include "NanostackMACPhy.h"
 
 /** Radio PHY driver class for Nanostack */
-class NanostackRfPhy : public NanostackPhy {
+class NanostackRfPhy : public NanostackMACPhy {
 public:
 
     /** Return the default on-board NanostackRfPhy

features/nanostack/sal-stack-nanostack/nanostack/platform/arm_hal_phy.h

@@ -95,6 +95,7 @@ typedef enum phy_link_type_e {
     PHY_LINK_15_4_SUBGHZ_TYPE,      /**< Standard 802.15.4 subGHz radio 868 /915MHz. */
     PHY_LINK_TUN,                   /**< Tunnel interface for Linux TUN, RF network driver over serial bus or just basic application to application data flow. */
     PHY_LINK_SLIP,                  /**< Generic SLIP driver which just forward SLIP payload */
+    PHY_LINK_PPP,                   /**< PPP interface */
 } phy_link_type_e;
 
 /** Data layers */