shell: commands: add nib shell command

sys/shell/commands/Makefile

@@ -32,6 +32,9 @@ endif
 ifneq (,$(filter gnrc_ipv6_nc,$(USEMODULE)))
   SRC += sc_ipv6_nc.c
 endif
+ifneq (,$(filter gnrc_ipv6_nib,$(USEMODULE)))
+  SRC += sc_gnrc_ipv6_nib.c
+endif
 ifneq (,$(filter gnrc_ipv6_whitelist,$(USEMODULE)))
   SRC += sc_whitelist.c
 endif

sys/shell/commands/sc_gnrc_ipv6_nib.c

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2017 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @{
+ *
+ * @file
+ * @author  Martine Lenders <[email protected]>
+ */
+
+#include "net/gnrc/ipv6/nib.h"
+#include "net/gnrc/netif.h"
+#include "net/ipv6/addr.h"
+
+static void _usage(char **argv);
+static int _nib_neigh(int argc, char **argv);
+
+int _gnrc_ipv6_nib(int argc, char **argv)
+{
+    int res = 1;
+    if ((argc < 2) || (strcmp(argv[1], "help") == 0)) {
+        _usage(argv);
+        res = 0;
+    }
+    else if (strcmp(argv[1], "neigh") == 0) {
+        res = _nib_neigh(argc, argv);
+    }
+    else {
+        _usage(argv);
+    }
+    return res;
+}
+
+static void _usage(char **argv)
+{
+    printf("usage: %s {neigh|help} ...\n", argv[0]);
+}
+
+static void _usage_nib_neigh(char **argv)
+{
+        printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
+        printf("       %s %s add <iface> <ipv6 addr> [<l2 addr>]\n", argv[0], argv[1]);
+        printf("       %s %s del <ipv6 addr>\n", argv[0], argv[1]);
+        printf("       %s %s show <ipv6 addr>\n", argv[0], argv[1]);
+}
+
+static int _nib_neigh(int argc, char **argv)
+{
+    if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
+        gnrc_ipv6_nib_nc_t entry;
+        void *state = NULL;
+        unsigned iface = 0U;
+
+        if (argc > 3) {
+            iface = atoi(argv[3]);
+        }
+        while (gnrc_ipv6_nib_nc_iter(iface, &state, &entry)) {
+            gnrc_ipv6_nib_nc_print(&entry);
+        }
+    }
+    else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
+        _usage_nib_neigh(argv);
+    }
+    else if ((argc > 4) && (strcmp(argv[2], "add") == 0)) {
+        ipv6_addr_t ipv6_addr;
+        uint8_t l2addr[GNRC_IPV6_NIB_L2ADDR_MAX_LEN];
+        size_t l2addr_len;
+        unsigned iface = atoi(argv[3]);
+
+        if (ipv6_addr_from_str(&ipv6_addr, argv[4]) == NULL) {
+            _usage_nib_neigh(argv);
+            return 1;
+        }
+        if ((argc > 5) && /* TODO also check if interface supports link-layers or not */
+            (l2addr_len = gnrc_netif_addr_from_str(l2addr, sizeof(l2addr),
+                                                   argv[5])) == 0) {
+            _usage_nib_neigh(argv);
+        }
+        gnrc_ipv6_nib_nc_set(&ipv6_addr, iface, l2addr, l2addr_len);
+    }
+    else if ((argc > 3) && (strcmp(argv[2], "del") == 0)) {
+        ipv6_addr_t ipv6_addr;
+
+        if (ipv6_addr_from_str(&ipv6_addr, argv[4]) == NULL) {
+            _usage_nib_neigh(argv);
+            return 1;
+        }
+        gnrc_ipv6_nib_nc_del(&ipv6_addr);
+    }
+    else {
+        _usage_nib_neigh(argv);
+        return 1;
+    }
+    return 0;
+}
+
+/** @} */

sys/shell/commands/shell_commands.c

@@ -84,6 +84,10 @@ extern int _random_init(int argc, char **argv);
 extern int _random_get(int argc, char **argv);
 #endif
 
+#ifdef MODULE_GNRC_NETIF
+extern int _gnrc_ipv6_nib(int argc, char **argv);
+#endif
+
 #ifdef MODULE_GNRC_NETIF
 extern int _netif_config(int argc, char **argv);
 extern int _netif_send(int argc, char **argv);
@@ -178,6 +182,9 @@ const shell_command_t _shell_command_list[] = {
 #ifdef CPU_X86
     {"lspci", "Lists PCI devices", _x86_lspci},
 #endif
+#ifdef MODULE_GNRC_IPV6_NIB
+    {"nib", "Configure neighbor information base", _gnrc_ipv6_nib},
+#endif
 #ifdef MODULE_GNRC_NETIF
     {"ifconfig", "Configure network interfaces", _netif_config},
 #ifdef MODULE_GNRC_TXTSND