shell_commands: add command to get 6lo frag statistics

sys/shell/commands/Makefile

@@ -54,6 +54,9 @@ ifneq (,$(filter gnrc_ipv6_nib_6lbr,$(USEMODULE)))
     SRC += sc_gnrc_6ctx.c
 endif
 endif
+ifneq (,$(filter gnrc_sixlowpan_frag_stats,$(USEMODULE)))
+  SRC += sc_gnrc_6lo_frag_stats.c
+endif
 ifneq (,$(filter saul_reg,$(USEMODULE)))
   SRC += sc_saul_reg.c
 endif

sys/shell/commands/sc_gnrc_6lo_frag_stats.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2019 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 <stdio.h>
+
+#include "net/gnrc/sixlowpan/frag.h"
+
+int _gnrc_6lo_frag_stats(int argc, char **argv)
+{
+    gnrc_sixlowpan_frag_stats_t *stats = gnrc_sixlowpan_frag_stats_get();
+
+    printf("rbuf full: %u\n", stats->rbuf_full);
+#ifdef MODULE_GNRC_SIXLOWPAN_FRAG_VRB
+    printf("VRB full: %u\n", stats->vrb_full);
+#endif
+}
+
+/** @} */

sys/shell/commands/shell_commands.c

@@ -117,6 +117,12 @@ extern int _gnrc_6ctx(int argc, char **argv);
 #endif
 #endif
 
+#ifdef MODULE_GNRC_SIXLOWPAN_FRAG_STATS
+#ifdef MODULE_GNRC_SIXLOWPAN_FRAG_STATS
+extern int _gnrc_6lo_frag_sats(int argc, char **argv);
+#endif
+#endif
+
 #ifdef MODULE_CCN_LITE_UTILS
 extern int _ccnl_open(int argc, char **argv);
 extern int _ccnl_content(int argc, char **argv);
@@ -217,6 +223,9 @@ const shell_command_t _shell_command_list[] = {
     {"6ctx", "6LoWPAN context configuration tool", _gnrc_6ctx },
 #endif
 #endif
+#ifdef MODULE_GNRC_SIXLOWPAN_FRAG_STATS
+    {"6lo_frag", "6LoWPAN fragment statistics", _gnrc_6lo_frag_stats },
+#endif
 #ifdef MODULE_SAUL_REG
     {"saul", "interact with sensors and actuators using SAUL", _saul },
 #endif