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/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \addtogroup uip6
* @{
*/
/**
* \file
* Header file for ICMPv6 message and error handing (RFC 4443)
* \author Julien Abeille <jabeille@cisco.com>
* \author Mathilde Durvy <mdurvy@cisco.com>
*/
#include <net/buf.h>
#ifndef ICMP6_H_
#define ICMP6_H_
#include "contiki/ip/uip.h"
/** \name ICMPv6 message types */
/** @{ */
#define ICMP6_DST_UNREACH 1 /**< dest unreachable */
#define ICMP6_PACKET_TOO_BIG 2 /**< packet too big */
#define ICMP6_TIME_EXCEEDED 3 /**< time exceeded */
#define ICMP6_PARAM_PROB 4 /**< ip6 header bad */
#define ICMP6_ECHO_REQUEST 128 /**< Echo request */
#define ICMP6_ECHO_REPLY 129 /**< Echo reply */
#define ICMP6_RS 133 /**< Router Solicitation */
#define ICMP6_RA 134 /**< Router Advertisement */
#define ICMP6_NS 135 /**< Neighbor Solicitation */
#define ICMP6_NA 136 /**< Neighbor advertisement */
#define ICMP6_REDIRECT 137 /**< Redirect */
#define ICMP6_RPL 155 /**< RPL */
#define ICMP6_PRIV_EXP_100 100 /**< Private Experimentation */
#define ICMP6_PRIV_EXP_101 101 /**< Private Experimentation */
#define ICMP6_PRIV_EXP_200 200 /**< Private Experimentation */
#define ICMP6_PRIV_EXP_201 201 /**< Private Experimentation */
#define ICMP6_ROLL_TM ICMP6_PRIV_EXP_200 /**< ROLL Trickle Multicast */
/** @} */
/** \name ICMPv6 Destination Unreachable message codes*/
/** @{ */
#define ICMP6_DST_UNREACH_NOROUTE 0 /**< no route to destination */
#define ICMP6_DST_UNREACH_ADMIN 1 /**< administratively prohibited */
#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /**< not a neighbor(obsolete) */
#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /**< beyond scope of source address */
#define ICMP6_DST_UNREACH_ADDR 3 /**< address unreachable */
#define ICMP6_DST_UNREACH_NOPORT 4 /**< port unreachable */
/** @} */
/** \name ICMPv6 Time Exceeded message codes*/
/** @{ */
#define ICMP6_TIME_EXCEED_TRANSIT 0 /**< ttl==0 in transit */
#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /**< ttl==0 in reass */
/** @} */
/** \name ICMPv6 Parameter Problem message codes*/
/** @{ */
#define ICMP6_PARAMPROB_HEADER 0 /**< erroneous header field */
#define ICMP6_PARAMPROB_NEXTHEADER 1 /**< unrecognized next header */
#define ICMP6_PARAMPROB_OPTION 2 /**< unrecognized option */
/** @} */
/** \brief Echo Request constant part length */
#define UIP_ICMP6_ECHO_REQUEST_LEN 4
/** \brief ICMPv6 Error message constant part length */
#define UIP_ICMP6_ERROR_LEN 4
/** \brief ICMPv6 Error message constant part */
typedef struct uip_icmp6_error{
uint32_t param;
} PACK_ALIAS_STRUCT uip_icmp6_error;
/** \name ICMPv6 RFC4443 Message processing and sending */
/** @{ */
/**
* \brief Send an icmpv6 error message
* \param type type of the error message
* \param code of the error message
* \param param 32 bit parameter of the error message, semantic depends on error
*/
void
uip_icmp6_error_output(struct net_buf *buf, uint8_t type, uint8_t code, uint32_t param);
/**
* \brief Send an icmpv6 message
* \param dest destination address of the message
* \param type type of the message
* \param code of the message
* \param payload_len length of the payload
*/
void
uip_icmp6_send(struct net_buf *buf, const uip_ipaddr_t *dest, int type, int code, int payload_len);
typedef void (* uip_icmp6_echo_reply_callback_t)(uip_ipaddr_t *source,
uint8_t ttl,
uint8_t *data,
uint16_t datalen);
struct uip_icmp6_echo_reply_notification {
struct uip_icmp6_echo_reply_notification *next;
uip_icmp6_echo_reply_callback_t callback;
};
/**
* \brief Add a callback function for ping replies
* \param n A struct uip_icmp6_echo_reply_notification that must have been allocated by the caller
* \param c A pointer to the callback function to be called
*
* This function adds a callback function to the list of
* callback functions that are called when an ICMP echo
* reply (ping reply) is received. This is used when
* implementing a ping protocol: attach a callback
* function to the ping reply, then send out a ping packet
* with uip_icmp6_send().
*
* The caller must have statically allocated a struct
* uip_icmp6_echo_reply_notification to hold the internal
* state of the callback function.
*
* When a ping reply packet is received, all registered
* callback functions are called. The callback functions
* must not modify the contents of the uIP buffer.
*/
void
uip_icmp6_echo_reply_callback_add(struct uip_icmp6_echo_reply_notification *n,
uip_icmp6_echo_reply_callback_t c);
/**
* \brief Remove a callback function for ping replies
* \param n A struct uip_icmp6_echo_reply_notification that must have been previously added with uip_icmp6_echo_reply_callback_add()
*
* This function removes a callback function from the list of
* callback functions that are called when an ICMP echo
* reply (ping reply) is received.
*/
void
uip_icmp6_echo_reply_callback_rm(struct uip_icmp6_echo_reply_notification *n);
/* Generic ICMPv6 input handers */
typedef struct uip_icmp6_input_handler {
struct uip_icmp6_input_handler *next;
uint8_t type;
uint8_t icode;
void (*handler)(struct net_buf *buf);
} uip_icmp6_input_handler_t;
#define UIP_ICMP6_INPUT_SUCCESS 0
#define UIP_ICMP6_INPUT_ERROR 1
#define UIP_ICMP6_HANDLER_CODE_ANY 0xFF /* Handle all codes for this type */
/*
* Initialise a variable of type uip_icmp6_input_handler, to be used later as
* the argument to uip_icmp6_register_input_handler
*
* The function pointer stored in this variable will get called and will be
* expected to handle incoming ICMPv6 datagrams of the specified type/code
*
* If code has a value of UIP_ICMP6_HANDLER_CODE_ANY, the same function
* will handle all codes for this type. In other words, the ICMPv6
* message's code is "don't care"
*/
#define UIP_ICMP6_HANDLER(name, type, code, func) \
static uip_icmp6_input_handler_t name = { NULL, type, code, func }
/**
* \brief Handle an incoming ICMPv6 message
* \param type The ICMPv6 message type
* \param icode The ICMPv6 message code
* \return Success: UIP_ICMP6_INPUT_SUCCESS, Error: UIP_ICMP6_INPUT_ERROR
*
* Generic handler for unknown ICMPv6 types. It will lookup for a registered
* function capable of handing this message type. The function must have first
* been registered with uip_icmp6_register_input_handler. The function is in
* charge of setting uip_len to 0, otherwise the uIPv6 core will attempt to
* send whatever remains in the UIP_IP_BUF.
*
* A return value of UIP_ICMP6_INPUT_ERROR means that a handler could not be
* invoked. This is most likely because the ICMPv6 type does not have a valid
* handler associated with it.
* UIP_ICMP6_INPUT_SUCCESS signifies that a handler was found for this ICMPv6
* type and that it was invoked. It does NOT provide any indication whatsoever
* regarding whether the handler itself succeeded.
*/
uint8_t uip_icmp6_input(struct net_buf *buf, uint8_t type, uint8_t icode);
/**
* \brief Register a handler which can handle a specific ICMPv6 message type
* \param handler A pointer to the handler
*/
void uip_icmp6_register_input_handler(uip_icmp6_input_handler_t *handler);
/**
* \brief Initialise the uIP ICMPv6 core
*/
void uip_icmp6_init(void);
/** @} */
#endif /*ICMP6_H_*/
/** @} */