rpl: add source routing header parsing for ng_net

sys/Makefile

@@ -107,6 +107,9 @@ endif
 ifneq (,$(filter ng_pktbuf,$(USEMODULE)))
     DIRS += net/crosslayer/ng_pktbuf
 endif
+ifneq (,$(filter ng_rpl_srh,$(USEMODULE)))
+    DIRS += net/routing/ng_rpl/srh
+endif
 ifneq (,$(filter ng_sixlowpan_ctx,$(USEMODULE)))
     DIRS += net/network_layer/ng_sixlowpan/ctx
 endif

sys/include/net/ng_rpl.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2015 Martine Lenders <[email protected]>
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup    net_ng_rpl  New RPL
+ * @ingroup     net
+ * @{
+ *
+ * @file
+ * @brief   TODO
+ *
+ * @author  Martine Lenders <[email protected]>
+ */
+#ifndef NG_RPL_H_
+#define NG_RPL_H_
+
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NG_RPL_H_ */
+/** @} */

sys/include/net/ng_rpl/srh.h

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2015 Martine Lenders <[email protected]>
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup    net_rpl_srh RPL source routing header extension
+ * @ingroup     net_rpl
+ * @brief       Implementation of RPL source routing extension headers
+ * @see <a href="https://tools.ietf.org/html/rfc6554">
+ *          RFC 6554
+ *      </a>
+ * @{
+ *
+ * @file
+ * @brief       Definititions for RPL source routing extension headers
+ *
+ * @author  Martine Lenders <[email protected]>
+ */
+#ifndef NG_RPL_SRH_H_
+#define NG_RPL_SRH_H_
+
+#include "net/ng_ipv6/addr.h"
+#include "net/ng_ipv6/ext.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   Type for source routing header.
+ */
+#define NG_RPL_SRH_TYPE     (3U)
+
+/**
+ * @brief   The RPL Source routing header.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc6554">
+ *          RFC 6554
+ *      </a>
+ *
+ * @extends ng_ipv6_ext_rh_t
+ */
+typedef struct __attribute__((packed)) {
+    uint8_t nh;         /**< next header */
+    uint8_t len;        /**< length in 8 octets without first octet */
+    uint8_t type;       /**< identifier of a particular routing header type */
+    uint8_t seg_left;   /**< number of route segments remaining */
+} ng_rpl_srh_t;
+
+/**
+ * @brief   Extract next hop from the RPL source routing header from a RPL
+ *          source routing header.
+ *
+ * @param[in] rh        A RPL source routing header.
+ *
+ * @return  next hop on success, on success
+ * @return  NULL, if not found.
+ */
+ng_ipv6_addr_t *ng_rpl_srh_next_hop(ng_rpl_srh_t *rh);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NG_RPL_SRH_H_ */
+/** @} */

sys/net/network_layer/ng_ipv6/ext/rh/ng_ipv6_ext_rh.c

@@ -46,6 +46,11 @@ ng_ipv6_addr_t *ng_ipv6_ext_rh_next_hop(ng_ipv6_hdr_t *ipv6)
 
     if (ipv6->nh == NG_PROTNUM_IPV6_EXT_RH) {
         switch (ext->type) {
+#ifdef MODULE_NG_RPL_SRH
+            case NG_RPL_SRH_TYPE:
+                return ng_rpl_srh_next_hop((ng_rpl_srh_t *)ext);
+#endif
+
             default:
                 break;
         }

sys/net/routing/ng_rpl/srh/ng_rpl_srh.c

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2015 Martine Lenders <[email protected]>
+ *
+ * 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
+ */
+
+#include "net/ng_rpl/srh.h"
+
+ng_ipv6_addr_t *ng_rpl_srh_next_hop(ng_rpl_srh_t *rh)
+{
+    /* TODO */
+
+    return NULL;
+}
+
+/** @} */