ng_icmpv6: Initial import

Makefile.dep

@@ -53,6 +53,15 @@ ifneq (,$(filter ng_sixlowpan_ctx,$(USEMODULE)))
   USEMODULE += vtimer
 endif
 
+ifneq (,$(filter ng_icmpv6_echo,$(USEMODULE)))
+  USEMODULE += ng_icmpv6
+  USEMODULE += ng_netbase
+endif
+
+ifneq (,$(filter ng_icmpv6,$(USEMODULE)))
+  USEMODULE += ng_ipv6
+endif
+
 ifneq (,$(filter ng_ipv6_hdr,$(USEMODULE)))
   USEMODULE += ng_inet_csum
   USEMODULE += ng_pktbuf
@@ -63,6 +72,7 @@ ifneq (,$(filter ng_ipv6_router,$(USEMODULE)))
 endif
 
 ifneq (,$(filter ng_ipv6,$(USEMODULE)))
+  USEMODULE += ng_icmpv6
   USEMODULE += ng_inet_csum
   USEMODULE += ng_ipv6_addr
   USEMODULE += ng_ipv6_hdr

sys/Makefile

@@ -62,6 +62,12 @@ endif
 ifneq (,$(filter oneway_malloc,$(USEMODULE)))
     DIRS += oneway-malloc
 endif
+ifneq (,$(filter ng_icmpv6,$(USEMODULE)))
+    DIRS += net/network_layer/ng_icmpv6
+endif
+ifneq (,$(filter ng_icmpv6_echo,$(USEMODULE)))
+    DIRS += net/network_layer/ng_icmpv6/echo
+endif
 ifneq (,$(filter ng_ipv6,$(USEMODULE)))
     DIRS += net/network_layer/ng_ipv6
 endif

sys/include/net/ng_icmpv6.h

@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.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.
+ */
+
+/**
+ * @defgroup    net_ng_icmpv6  Internet Control Message Protocol for IPv6
+ * @ingroup     net_ng_ipv6
+ * @brief       Basic implementation of ICMPv6
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4443">
+ *          RFC 4443
+ *      </a>
+ * @{
+ *
+ * @file
+ * @brief       Definitions for ICMPv6
+ *
+ * @author      Martine Lenders <mlenders@inf.fu-berlin.de>
+ */
+
+#ifndef NG_ICMPV6_H_
+#define NG_ICMPV6_H_
+
+#include <inttypes.h>
+
+#include "byteorder.h"
+#include "kernel_types.h"
+#include "net/ng_ipv6/hdr.h"
+#include "net/ng_nettype.h"
+#include "net/ng_nettype.h"
+#include "net/ng_pkt.h"
+
+#include "net/ng_icmpv6/echo.h"
+#include "net/ng_icmpv6/error.h"
+#include "net/ng_icmpv6/types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   General ICMPv6 message format.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4443#section-2.1">
+ *          RFC 4443, section 2.1
+ *      </a>
+ */
+typedef struct __attribute__((packed)) {
+    uint8_t type;           /**< message type */
+    uint8_t code;           /**< message code */
+    network_uint16_t csum;  /**< checksum */
+} ng_icmpv6_hdr_t;
+
+/**
+ * @brief   Demultiplexes a received ICMPv6 packet according to its type field.
+ *
+ * @param[in] iface     The receiving interface
+ * @param[in] pkt       The packet to demultiplex.
+ */
+void ng_icmpv6_demux(kernel_pid_t iface, ng_pktsnip_t *pkt);
+
+/**
+ * @brief   Builds an ICMPv6 message for sending.
+ *
+ * @param[in] type  Type for the ICMPv6 message.
+ * @param[in] code  Code for the ICMPv6 message.
+ * @param[in] size  Size of the ICMPv6 message (needs do be >
+ *                  `sizeof(ng_icmpv6_hdr_t)`).
+ *
+ * @return  The ICMPv6 message on success
+ * @return  NULL, on failure
+ */
+ng_pktsnip_t *ng_icmpv6_build(uint8_t type, uint8_t code, size_t size);
+
+/* TODO: build error messages */
+
+/**
+ * @brief   Calculates the checksum for an ICMPv6 packet.
+ *
+ * @param[in] hdr           The header the checksum should be calculated
+ *                          for.
+ * @param[in] pseudo_hdr    The header the pseudo header shall be generated
+ *                          from. NULL if none is needed.
+ *
+ * @return  0, on success.
+ * @return  -EINVAL, if ng_pktsnip_t::type of @p pkt was not NG_NETTYPE_ICMPV6
+ * @return  -ENOENT, if ng_pktsnip_t::type of @p pseudo_hdr was not
+ *          NG_NETTYPE_IPV6
+ */
+int ng_icmpv6_calc_csum(ng_pktsnip_t *hdr, ng_pktsnip_t *pseudo_hdr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NG_ICMPV6_H_ */
+/**
+ * @}
+ */

sys/include/net/ng_icmpv6/echo.h

@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.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.
+ */
+
+/**
+ * @defgroup    net_ng_icmpv6_echo  ICMPv6 echo messages
+ * @ingroup     net_ng_icmpv6
+ * @brief       ICMPv6 echo request and reply
+ * @{
+ *
+ * @file
+ * @brief   ICMPv6 echo message definitions
+ *
+ * @author  Martine Lenders <mlenders@inf.fu-berlin.de>
+ */
+#ifndef NG_ICMPV6_ECHO_H_
+#define NG_ICMPV6_ECHO_H_
+
+#include <inttypes.h>
+
+#include "byteorder.h"
+#include "kernel_types.h"
+#include "net/ng_icmpv6/types.h"
+#include "net/ng_ipv6/hdr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   Echo request and response message format.
+ * @extends ng_icmpv6_hdr_t
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4443#section-4.1">
+ *          RFC 4443, section 4.1
+ *      </a>
+ * @see <a href="https://tools.ietf.org/html/rfc4443#section-4.2">
+ *          RFC 4443, section 4.2
+ *      </a>
+ */
+typedef struct __attribute__((packed)) {
+    uint8_t type;           /**< message type */
+    uint8_t code;           /**< message code */
+    network_uint16_t csum;  /**< checksum */
+    network_uint16_t id;    /**< identifier */
+    network_uint16_t seq;   /**< Sequence number */
+} ng_icmpv6_echo_t;
+
+/**
+ * @brief   Builds an ICMPv6 echo message of type @p type for sending.
+ *
+ * @param[in] type      Type of the echo message. Expected to be either
+ *                      NG_ICMPV6_ECHO_REQ or NG_ICMPV6_ECHO_REP.
+ * @param[in] id        ID for the echo message in host byte-order
+ * @param[in] seq       Sequence number for the echo message in host byte-order
+ * @param[in] data      Payload for the echo message
+ * @param[in] data_len  Length of @p data
+ *
+ * @return  The echo message on success
+ * @return  NULL, on failure
+ */
+ng_pktsnip_t *ng_icmpv6_echo_build(uint8_t type, uint16_t id, uint16_t seq,
+                                   uint8_t *data, size_t data_len);
+
+/**
+ * @brief   Builds an ICMPv6 echo request for sending.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4443#section-4.1">
+ *          RFC 4443, section 4.1
+ *      </a>
+ *
+ * @param[in] id        ID for the echo request in host byte-order
+ * @param[in] seq       Sequence number for the echo request in host byte-order
+ * @param[in] data      Payload for the echo request
+ * @param[in] data_len  Length of @p data
+ *
+ * @return  The echo request message on success
+ * @return  NULL, on failure
+ */
+static inline ng_pktsnip_t *ng_icmpv6_echo_req_build(uint16_t id, uint16_t seq,
+        uint8_t *data, size_t data_len)
+{
+    return ng_icmpv6_echo_build(NG_ICMPV6_ECHO_REQ, id, seq, data, data_len);
+}
+
+/**
+ * @brief   Builds an ICMPv6 echo reply for sending.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4443#section-4.2">
+ *          RFC 4443, section 4.2
+ *      </a>
+ *
+ * @param[in] id        ID for the echo reply in host byte-order
+ * @param[in] seq       Sequence number for the echo reply in host byte-order
+ * @param[in] data      Payload for the echo reply
+ * @param[in] data_len  Length of @p data
+ *
+ * @return  The echo reply message on success
+ * @return  NULL, on failure
+ */
+static inline ng_pktsnip_t *ng_icmpv6_echo_rep_build(uint16_t id, uint16_t seq,
+        uint8_t *data, size_t data_len)
+{
+    return ng_icmpv6_echo_build(NG_ICMPV6_ECHO_REP, id, seq, data, data_len);
+}
+
+
+/**
+ * @brief   ICMPv6 echo request handler
+ *
+ * @param[in] iface     The interface the echo requuest was received on.
+ * @param[in] ipv6_hdr  The IPv6 header of the echo request.
+ * @param[in] echo      The Echo Request message.
+ * @param[in] len       Length of the echo request message (ng_ipv6_hdr_t::len
+ *                      of @p ipv6_hdr minus length of extension headers).
+ */
+void ng_icmpv6_echo_req_handle(kernel_pid_t iface, ng_ipv6_hdr_t *ipv6_hdr,
+                               ng_icmpv6_echo_t *echo, uint16_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NG_ICMPV6_ECHO_H_ */
+/** @} */