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/*
* 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_gnrc_icmpv6_echo ICMPv6 echo messages
* @ingroup net_gnrc_icmpv6
* @brief ICMPv6 echo request and reply
* @{
*
* @file
* @brief ICMPv6 echo message definitions
*
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#ifndef GNRC_ICMPV6_ECHO_H_
#define GNRC_ICMPV6_ECHO_H_
#include <inttypes.h>
#include "byteorder.h"
#include "kernel_types.h"
#include "net/ipv6/hdr.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Builds an ICMPv6 echo message of type @p type for sending.
*
* @param[in] type Type of the echo message. Expected to be either
* ICMPV6_ECHO_REQ or 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
*/
gnrc_pktsnip_t *gnrc_icmpv6_echo_build(uint8_t type, uint16_t id, uint16_t seq,
uint8_t *data, size_t 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 (ipv6_hdr_t::len
* of @p ipv6_hdr minus length of extension headers).
*/
void gnrc_icmpv6_echo_req_handle(kernel_pid_t iface, ipv6_hdr_t *ipv6_hdr,
icmpv6_echo_t *echo, uint16_t len);
#ifdef __cplusplus
}
#endif
#endif /* GNRC_ICMPV6_ECHO_H_ */
/** @} */
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