sys: add netopt to string map function and netopt module

sys/Makefile

@@ -59,6 +59,10 @@ ifneq (,$(filter udp,$(USEMODULE)))
     DIRS += net/transport_layer/udp
 endif
 
+ifneq (,$(filter netopt,$(USEMODULE)))
+    DIRS += net/crosslayer/netopt
+endif
+
 DIRS += $(dir $(wildcard $(addsuffix /Makefile, ${USEMODULE})))
 
 include $(RIOTBASE)/Makefile.base

sys/include/net/netopt.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2015 Freie Universität Berlin
+ *               2015 Kaspar Schleiser <kaspar@schleiser.de>
  *
  * 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
@@ -18,6 +19,7 @@
  *
  * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
  * @author      Oliver Hahm <oliver.hahm@inria.fr>
+ * @author      Kaspar Schleiser <kaspar@schleiser.de>
  */
 
 #ifndef NETOPT_H_
@@ -177,6 +179,15 @@ typedef enum {
     /* add other states if needed */
 } netopt_state_t;
 
+/**
+ * @brief   Get a string ptr corresponding to opt, for debugging
+ *
+ * @param[in] opt   The option to get a string representation for
+ *
+ * @return          ptr to string representation for given option or "unknown"
+ */
+const char *netopt2str(netopt_t opt);
+
 #ifdef __cplusplus
 }
 #endif

sys/net/crosslayer/netopt/Makefile

@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base

sys/net/crosslayer/netopt/netopt.c

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
+ *
+ * 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.
+ */
+
+/**
+ * @{
+ * @ingroup     net_netopt
+ * @file
+ * @brief       This file contains functionality to map netopt option
+ *              numbers to strings
+ *
+ * @author      Kaspar Schleiser <kaspar@schleiser.de>
+ * @}
+ */
+
+#include "net/netopt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static const char *_netopt_strmap[] = {
+    [NETOPT_CHANNEL]         = "NETOPT_CHANNEL",
+    [NETOPT_IS_CHANNEL_CLR]  = "NETOPT_IS_CHANNEL_CLR",
+    [NETOPT_ADDRESS]         = "NETOPT_ADDRESS",
+    [NETOPT_ADDRESS_LONG]    = "NETOPT_ADDRESS_LONG",
+    [NETOPT_ADDR_LEN]        = "NETOPT_ADDR_LEN",
+    [NETOPT_SRC_LEN]         = "NETOPT_SRC_LEN",
+    [NETOPT_NID]             = "NETOPT_NID",
+    [NETOPT_IPV6_IID]        = "NETOPT_IPV6_IID",
+    [NETOPT_TX_POWER]        = "NETOPT_TX_POWER",
+    [NETOPT_MAX_PACKET_SIZE] = "NETOPT_MAX_PACKET_SIZE",
+    [NETOPT_PRELOADING]      = "NETOPT_PRELOADING",
+    [NETOPT_PROMISCUOUSMODE] = "NETOPT_PROMISCUOUSMODE",
+    [NETOPT_AUTOACK]         = "NETOPT_AUTOACK",
+    [NETOPT_RETRANS]         = "NETOPT_RETRANS",
+    [NETOPT_PROTO]           = "NETOPT_PROTO",
+    [NETOPT_STATE]           = "NETOPT_STATE",
+    [NETOPT_RAWMODE]         = "NETOPT_RAWMODE",
+    [NETOPT_RX_START_IRQ]    = "NETOPT_RX_START_IRQ",
+    [NETOPT_RX_END_IRQ]      = "NETOPT_RX_END_IRQ",
+    [NETOPT_TX_START_IRQ]    = "NETOPT_TX_START_IRQ",
+    [NETOPT_TX_END_IRQ]      = "NETOPT_TX_END_IRQ",
+    [NETOPT_AUTOCCA]         = "NETOPT_AUTOCCA",
+    [NETOPT_NUMOF]           = "NETOPT_NUMOF",
+};
+
+const char *netopt2str(netopt_t opt)
+{
+    if (opt >= NETOPT_NUMOF) {
+        return "unknown";
+    }
+    else {
+        const char *tmp = _netopt_strmap[opt];
+        return tmp ? tmp : "unknown";
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif