gnrc_netif: check all required options on initialization

drivers/include/net/netdev.h

@@ -206,6 +206,7 @@ extern "C" {
 
 enum {
     NETDEV_TYPE_UNKNOWN,
+    NETDEV_TYPE_TEST,
     NETDEV_TYPE_RAW,
     NETDEV_TYPE_ETHERNET,
     NETDEV_TYPE_IEEE802154,

sys/net/gnrc/netif/gnrc_netif.c

@@ -1161,6 +1161,110 @@ static void _configure_netdev(netdev_t *dev)
 #endif
 }
 
+#ifdef DEVELHELP
+/* checks if a device supports all required options and functions */
+static void _test_options(gnrc_netif_t *netif)
+{
+    uint8_t dummy_addr[GNRC_NETIF_L2ADDR_MAXLEN] = { 0 };
+    ndp_opt_t dummy_opt = { .len = 1U };
+    uint64_t tmp64 = 0ULL;
+
+    (void)dummy_addr;
+    (void)dummy_opt;
+    (void)tmp64;
+#if (GNRC_NETIF_L2ADDR_MAXLEN > 0)
+    /* check if address was set in _update_l2addr_from_dev()
+     * (NETOPT_DEVICE_TYPE already tested in _configure_netdev()) and
+     * if MTU and max. fragment size was set properly by
+     * gnrc_netif_ipv6_init_mtu()
+     * all checked types below have link-layer addresses so we don't need to
+     * check `GNRC_NETIF_FLAGS_HAS_L2ADDR` */
+    switch (netif->device_type) {
+#ifdef TEST_SUITES
+        case NETDEV_TYPE_TEST:
+            /* make no assumptions about test devices */
+            break;
+#endif
+        case NETDEV_TYPE_BLE:
+        case NETDEV_TYPE_ETHERNET:
+        case NETDEV_TYPE_ESP_NOW:
+            assert(netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR);
+            assert(ETHERNET_ADDR_LEN == netif->l2addr_len);
+#ifdef MODULE_GNRC_IPV6
+            switch (netif->device_type) {
+                case NETDEV_TYPE_BLE:
+                    assert(netif->ipv6.mtu == IPV6_MIN_MTU);
+                    break;
+                case NETDEV_TYPE_ETHERNET:
+                    assert(netif->ipv6.mtu == ETHERNET_DATA_LEN);
+                    break;
+                case NETDEV_TYPE_ESP_NOW:
+                    assert(netif->ipv6.mtu <= ETHERNET_DATA_LEN);
+            }
+#endif  /* MODULE GNRC_IPV6 */
+            break;
+        case NETDEV_TYPE_IEEE802154:
+        case NETDEV_TYPE_NRFMIN: {
+            gnrc_nettype_t tmp;
+
+            /* in case assert() evaluates to NOP */
+            (void)tmp;
+            assert(netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR);
+            assert((IEEE802154_SHORT_ADDRESS_LEN == netif->l2addr_len) ||
+                   (IEEE802154_LONG_ADDRESS_LEN == netif->l2addr_len));
+            assert(-ENOTSUP != netif->dev->driver->get(netif->dev, NETOPT_PROTO,
+                                                       &tmp, sizeof(tmp)));
+#ifdef MODULE_GNRC_IPV6
+#ifdef MODULE_GNRC_SIXLOWPAN
+            assert(netif->ipv6.mtu == IPV6_MIN_MTU);
+            assert(netif->sixlo.max_frag_size > 0);
+#else   /* MODULE_GNRC_SIXLOWPAN */
+            assert(netif->ipv6.mtu < UINT16_MAX);
+#endif  /* MODULE_GNRC_SIXLOWPAN */
+#endif  /* MODULE_GNRC_IPV6 */
+#ifdef MODULE_GNRC_SIXLOWPAN_ND
+            assert((netif->device_type != NETDEV_TYPE_IEEE802154) ||
+                   (-ENOTSUP != netif->dev->driver->get(netif->dev,
+                                                        NETOPT_ADDRESS_LONG,
+                                                        &dummy_addr,
+                                                        sizeof(dummy_addr))));
+#endif  /* MODULE_GNRC_SIXLOWPAN_ND */
+            break;
+        }
+        case NETDEV_TYPE_CC110X:
+            assert(netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR);
+            assert(1U == netif->l2addr_len);
+#ifdef MODULE_GNRC_IPV6
+            assert(netif->ipv6.mtu < UINT16_MAX);
+#endif  /* MODULE_GNRC_IPV6 */
+            break;
+        case NETDEV_TYPE_SLIP:
+            assert(!(netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR));
+            assert(0U == netif->l2addr_len);
+            /* don't check MTU here for now since I'm not sure the current
+             * one is correct ^^" "*/
+            break;
+        default:
+            /* device type not supported yet, please amend case above when
+             * porting new device type */
+            assert(false);
+    }
+    /* These functions only apply to network devices having link-layers */
+    if (netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR) {
+#ifdef MODULE_GNRC_IPV6
+        assert(-ENOTSUP != gnrc_netif_ipv6_get_iid(netif, (eui64_t *)&tmp64));
+        assert(-ENOTSUP != gnrc_netif_ndp_addr_len_from_l2ao(netif,
+                                                             &dummy_opt));
+#endif  /* MODULE_GNRC_IPV6 */
+#if GNRC_IPV6_NIB_CONF_6LN
+        assert(-ENOTSUP != gnrc_netif_ipv6_iid_to_addr(netif, (eui64_t *)&tmp64,
+                                                       dummy_addr));
+#endif  /* GNRC_IPV6_NIB_CONF_6LN */
+    }
+#endif /* (GNRC_NETIF_L2ADDR_MAXLEN > 0) */
+}
+#endif /* DEVELHELP */
+
 static void *_gnrc_netif_thread(void *args)
 {
     gnrc_netapi_opt_t *opt;
@@ -1194,6 +1298,9 @@ static void *_gnrc_netif_thread(void *args)
     }
     _configure_netdev(dev);
     _init_from_device(netif);
+#ifdef DEVELHELP
+    _test_options(netif);
+#endif
     netif->cur_hl = GNRC_NETIF_DEFAULT_HL;
 #ifdef MODULE_GNRC_IPV6_NIB
     gnrc_ipv6_nib_init_iface(netif);

sys/net/gnrc/netif/gnrc_netif_device_type.c

@@ -298,9 +298,11 @@ int gnrc_netif_ndp_addr_len_from_l2ao(gnrc_netif_t *netif,
             (void)opt;
             return sizeof(uint8_t);
 #endif  /* MODULE_CC110X */
-#if defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW)
+#if defined(MODULE_NETDEV_ETH) || defined(MODULE_ESP_NOW) || \
+    defined(MODULE_NORDIC_SOFTDEVICE_BLE)
         case NETDEV_TYPE_ETHERNET:
         case NETDEV_TYPE_ESP_NOW:
+        case NETDEV_TYPE_BLE:
             /* see https://tools.ietf.org/html/rfc2464#section-6*/
             if (opt->len == 1U) {
                 return ETHERNET_ADDR_LEN;

tests/gnrc_ipv6_nib_6ln/mockup_netif.c

@@ -77,6 +77,14 @@ int _get_address_long(netdev_t *dev, void *value, size_t max_len)
     return sizeof(addr);
 }
 
+int _get_proto(netdev_t *dev, void *value, size_t max_len)
+{
+    (void)dev;
+    assert(max_len == sizeof(gnrc_nettype_t));
+    *((gnrc_nettype_t *)value) = GNRC_NETTYPE_SIXLOWPAN;
+    return sizeof(gnrc_nettype_t);
+}
+
 void _tests_init(void)
 {
     msg_init_queue(_main_msg_queue, _MSG_QUEUE_SIZE);
@@ -89,6 +97,8 @@ void _tests_init(void)
                            _get_src_len);
     netdev_test_set_get_cb(&_mock_netdev, NETOPT_ADDRESS_LONG,
                            _get_address_long);
+    netdev_test_set_get_cb(&_mock_netdev, NETOPT_PROTO,
+                           _get_proto);
     _mock_netif = gnrc_netif_ieee802154_create(
            _mock_netif_stack, THREAD_STACKSIZE_DEFAULT, GNRC_NETIF_PRIO,
             "mockup_wpan", &_mock_netdev.netdev.netdev

tests/gnrc_ndp/Makefile

@@ -1,13 +1,15 @@
 include ../Makefile.tests_common
 
 BOARD_INSUFFICIENT_MEMORY := arduino-duemilanove arduino-mega2560 arduino-uno \
-                             chronos nucleo-f031k6 nucleo-f042k6 nucleo-l031k6 \
+                             chronos nucleo-f030r8 nucleo-f031k6 nucleo-f042k6 \
+                             nucleo-l031k6 nucleo-l053r8 stm32f0discovery \
                              telosb waspmote-pro wsn430-v1_3b wsn430-v1_4
 
 USEMODULE += gnrc_ipv6_nib_router
 USEMODULE += gnrc_ndp
 USEMODULE += gnrc_netif
 USEMODULE += embunit
+USEMODULE += netdev_ieee802154
 USEMODULE += netdev_test
 
 CFLAGS += -DGNRC_NETTYPE_NDP=GNRC_NETTYPE_TEST

tests/gnrc_ndp/main.c

@@ -436,6 +436,9 @@ static void test_nbr_sol_send(const ipv6_addr_t *src)
     gnrc_pktsnip_t *pkt;
     ndp_nbr_sol_t *nbr_sol;
 
+    while (msg_try_receive(&msg) == 1) {
+        /* empty message queue */
+    }
     TEST_ASSERT_NOT_NULL(test_netif);
     gnrc_ndp_nbr_sol_send(&test_tgt, test_netif, src, &test_dst, NULL);
     msg_receive(&msg);
@@ -947,45 +950,6 @@ static gnrc_pktsnip_t *_test_netif_recv(gnrc_netif_t *netif)
     return NULL;
 }
 
-static int _test_netif_get(gnrc_netif_t *netif, gnrc_netapi_opt_t *opt)
-{
-    (void)netif;
-    switch (opt->opt) {
-        case NETOPT_ADDRESS_LONG:
-            if (opt->data_len < sizeof(test_src_l2)) {
-                return -EOVERFLOW;
-            }
-            memcpy(opt->data, test_src_l2, sizeof(test_src_l2));
-            return sizeof(test_src_l2);
-        case NETOPT_SRC_LEN: {
-                uint16_t *val = opt->data;
-                if (opt->data_len != sizeof(uint16_t)) {
-                    return -EOVERFLOW;
-                }
-                *val = sizeof(test_src_l2);
-                return sizeof(uint16_t);
-            }
-        case NETOPT_IPV6_IID:
-            if (opt->data_len < sizeof(uint64_t)) {
-                return -EOVERFLOW;
-            }
-            memcpy(opt->data, &test_src.u64[1], sizeof(uint64_t));
-            return sizeof(uint64_t);
-        case NETOPT_IS_WIRED:
-            return 1;
-        case NETOPT_MAX_PDU_SIZE: {
-                uint16_t *val = opt->data;
-                if (opt->data_len != sizeof(uint16_t)) {
-                    return -EOVERFLOW;
-                }
-                *val = 100U;
-                return sizeof(uint16_t);
-            }
-        default:
-            return -ENOTSUP;
-    }
-}
-
 static int _test_netif_set(gnrc_netif_t *netif, const gnrc_netapi_opt_t *opt)
 {
     (void)netif;
@@ -996,11 +960,43 @@ static int _test_netif_set(gnrc_netif_t *netif, const gnrc_netapi_opt_t *opt)
 static const gnrc_netif_ops_t _test_netif_ops = {
     .send = _test_netif_send,
     .recv = _test_netif_recv,
-    .get = _test_netif_get,
+    .get = gnrc_netif_get_from_netdev,
     .set = _test_netif_set,
 };
 
-int _netdev_test_device_type_get(netdev_t *dev, void *value, size_t max_len)
+static int _netdev_test_address_long(netdev_t *dev, void *value, size_t max_len)
+{
+    (void)dev;
+    assert(max_len >= sizeof(test_src_l2));
+    memcpy(value, test_src_l2, sizeof(test_src_l2));
+    return sizeof(test_src_l2);
+}
+
+static int _netdev_test_proto(netdev_t *dev, void *value, size_t max_len)
+{
+    (void)dev;
+     assert(max_len == sizeof(gnrc_nettype_t));
+     *((gnrc_nettype_t *)value) = GNRC_NETTYPE_UNDEF;
+     return sizeof(gnrc_nettype_t);
+}
+
+static int _netdev_test_src_len(netdev_t *dev, void *value, size_t max_len)
+{
+    (void)dev;
+     assert(max_len == sizeof(uint16_t));
+     *((uint16_t *)value) = sizeof(test_src_l2);
+     return sizeof(uint16_t);
+}
+
+static int _netdev_test_max_pdu_size(netdev_t *dev, void *value, size_t max_len)
+{
+    (void)dev;
+     assert(max_len == sizeof(uint16_t));
+     *((uint16_t *)value) = 100U;
+     return sizeof(uint16_t);
+}
+
+static int _netdev_test_device_type(netdev_t *dev, void *value, size_t max_len)
 {
     (void)dev;
      assert(max_len == sizeof(uint16_t));
@@ -1015,10 +1011,16 @@ static void init_pkt_handler(void)
                                sched_active_pid);
     gnrc_netreg_register(GNRC_NETTYPE_NDP, &netreg_entry);
     netdev_test_setup(&dev, NULL);
-    netdev_test_set_get_cb(&dev, NETOPT_DEVICE_TYPE, _netdev_test_device_type_get);
+    netdev_test_set_get_cb(&dev, NETOPT_ADDRESS_LONG,
+                           _netdev_test_address_long);
+    netdev_test_set_get_cb(&dev, NETOPT_PROTO, _netdev_test_proto);
+    netdev_test_set_get_cb(&dev, NETOPT_SRC_LEN, _netdev_test_src_len);
+    netdev_test_set_get_cb(&dev, NETOPT_MAX_PDU_SIZE,
+                           _netdev_test_max_pdu_size);
+    netdev_test_set_get_cb(&dev, NETOPT_DEVICE_TYPE, _netdev_test_device_type);
     test_netif = gnrc_netif_create(test_netif_stack, sizeof(test_netif_stack),
                                    GNRC_NETIF_PRIO, "test-netif",
-                                   &dev.netdev, &_test_netif_ops);
+                                   &dev.netdev.netdev, &_test_netif_ops);
     TEST_ASSERT_MESSAGE(test_netif != NULL,
                         "Unable to start test interface");
     memcpy(&test_netif->ipv6.addrs[0], &test_src,

tests/gnrc_netif/common.c

@@ -124,11 +124,19 @@ static int _get_netdev_device_type(netdev_t *netdev, void *value, size_t max_len
         *((uint16_t *)value) = NETDEV_TYPE_IEEE802154;
     }
     else {
-        *((uint16_t *)value) = NETDEV_TYPE_UNKNOWN;
+        *((uint16_t *)value) = NETDEV_TYPE_TEST;
     }
     return sizeof(uint16_t);
 }
 
+static int _get_netdev_proto(netdev_t *dev, void *value, size_t max_len)
+{
+    assert(dev == ieee802154_dev);
+    assert(max_len == sizeof(gnrc_nettype_t));
+    *((gnrc_nettype_t *)value) = GNRC_NETTYPE_UNDEF;
+    return sizeof(gnrc_nettype_t);
+}
+
 static int _get_netdev_max_packet_size(netdev_t *netdev, void *value, size_t max_len)
 {
     assert(max_len == sizeof(uint16_t));
@@ -166,6 +174,8 @@ void _tests_init(void)
     netdev_test_set_isr_cb((netdev_test_t *)ieee802154_dev, _netdev_isr);
     netdev_test_set_get_cb((netdev_test_t *)ieee802154_dev, NETOPT_DEVICE_TYPE,
                            _get_netdev_device_type);
+    netdev_test_set_get_cb((netdev_test_t *)ieee802154_dev, NETOPT_PROTO,
+                           _get_netdev_proto);
     netdev_test_set_get_cb((netdev_test_t *)ieee802154_dev,
                            NETOPT_MAX_PDU_SIZE, _get_netdev_max_packet_size);
     for (intptr_t i = SPECIAL_DEVS; i < GNRC_NETIF_NUMOF; i++) {

tests/gnrc_netif/main.c

@@ -163,7 +163,7 @@ static void test_creation(void)
         TEST_ASSERT_NOT_NULL(netifs[i]->ops);
         TEST_ASSERT_NOT_NULL(netifs[i]->dev);
         TEST_ASSERT_EQUAL_INT(GNRC_NETIF_DEFAULT_HL, netifs[i]->cur_hl);
-        TEST_ASSERT_EQUAL_INT(NETDEV_TYPE_UNKNOWN, netifs[i]->device_type);
+        TEST_ASSERT_EQUAL_INT(NETDEV_TYPE_TEST, netifs[i]->device_type);
         TEST_ASSERT(netifs[i]->pid > KERNEL_PID_UNDEF);
         TEST_ASSERT(thread_has_msg_queue(sched_threads[netifs[i]->pid]));
         TEST_ASSERT_EQUAL_INT(i + SPECIAL_DEVS + 1, gnrc_netif_numof());

tests/gnrc_sixlowpan/main.c

@@ -57,6 +57,15 @@ static int _get_netdev_device_type(netdev_t *netdev, void *value, size_t max_len
     return sizeof(uint16_t);
 }
 
+static int _get_netdev_proto(netdev_t *netdev, void *value, size_t max_len)
+{
+    assert(max_len == sizeof(gnrc_nettype_t));
+    (void)netdev;
+
+    *((gnrc_nettype_t *)value) = GNRC_NETTYPE_SIXLOWPAN;
+    return sizeof(gnrc_nettype_t);
+}
+
 static int _get_netdev_max_packet_size(netdev_t *netdev, void *value,
                                        size_t max_len)
 {
@@ -91,6 +100,8 @@ static void _init_interface(void)
     netdev_test_setup(&_ieee802154_dev, NULL);
     netdev_test_set_get_cb(&_ieee802154_dev, NETOPT_DEVICE_TYPE,
                            _get_netdev_device_type);
+    netdev_test_set_get_cb(&_ieee802154_dev, NETOPT_PROTO,
+                           _get_netdev_proto);
     netdev_test_set_get_cb(&_ieee802154_dev, NETOPT_MAX_PDU_SIZE,
                            _get_netdev_max_packet_size);
     netdev_test_set_get_cb(&_ieee802154_dev, NETOPT_SRC_LEN,