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/*
* Copyright (C) 2014 Freie Universitรคt Berlin
*
* 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 nhdp NHDP
* @ingroup net
* @brief The MANET Neighborhood Discovery Protocol (RFC 6130)
* @{
*
* @file
* @brief Interface for core functionality of NHDP
*
* @author Fabian Nack <nack@inf.fu-berlin.de>
*/
#ifndef NHDP_H_
#define NHDP_H_
#include "timex.h"
#include "xtimer.h"
#include "kernel_types.h"
#include "nhdp_metric.h"
#include "rfc5444/rfc5444_writer.h"
#ifdef __cplusplus
extern "C" {
#endif
/** @brief Definition for RIOTs debugging option */
#define ENABLE_DEBUG (0)
#include "debug.h"
/**
* @name NHDP protocol macros
*
* @{
*/
#ifndef MANET_PORT
/** @brief Well-known MANET port from RFC 5498 */
#define MANET_PORT (269)
#endif
/** @brief Stack size for NHDP thread */
#if ENABLE_DEBUG
#define NHDP_STACK_SIZE (THREAD_STACKSIZE_DEFAULT + THREAD_EXTRA_STACKSIZE_PRINTF)
#else
#define NHDP_STACK_SIZE (THREAD_STACKSIZE_DEFAULT)
#endif
/** @brief Buffer size in bytes for NHDP writer's msg buffer */
#define NHDP_WR_MSG_BUF_SIZE (256)
/** @brief Buffer size in bytes for NHDP writer's tlv buffer */
#define NHDP_WR_TLV_BUF_SIZE (512)
/* TODO: Determine a good value */
/** @brief Queue size for msg queue of NHDP */
#define NHDP_MSG_QUEUE_SIZE (16)
/** @brief Maximum size of handled RFC5444 packets */
#define NHDP_MAX_RFC5444_PACKET_SZ (128)
/** @brief Default hello interval in milliseconds */
#define NHDP_DEFAULT_HELLO_INT_MS (2000)
/** @brief Default hold time in milliseconds */
#define NHDP_DEFAULT_HOLD_TIME_MS (3 * NHDP_DEFAULT_HELLO_INT_MS)
/**
* @brief Initial pending flag value for new link tuples
*
* Do not change (link quality currently not considered)
*/
#define NHDP_INITIAL_PENDING (0)
/** @brief Maximum jitter for nhdp messages in milliseconds */
#define NHDP_HP_MAXJITTER_MS (200)
#define NHDP_L_HOLD_TIME_MS (NHDP_DEFAULT_HOLD_TIME_MS)
#define NHDP_N_HOLD_TIME_MS (NHDP_DEFAULT_HOLD_TIME_MS)
#define NHDP_I_HOLD_TIME_MS (NHDP_DEFAULT_HOLD_TIME_MS)
/** @} */
/**
* @brief MANET interface representation
*/
typedef struct {
kernel_pid_t if_pid; /**< PID of the interface's handling thread */
xtimer_t if_timer; /**< xtimer used for the periodic signaling */
timex_t hello_interval; /**< Interval time for periodic HELLOs */
timex_t validity_time; /**< Validity time for propagated information */
uint16_t seq_no; /**< Sequence number of last send RFC5444 packet */
struct rfc5444_writer_target wr_target; /**< Interface specific writer target */
} nhdp_if_entry_t;
/**
* @brief Additional address types for link layer operation
*/
enum nhdp_address_type_t {
AF_CC110X = AF_MAX + 3,
};
/**
* @brief Initialize NHDP for operation
*
* Sets up NHDP's reader and writer. Call first before starting NHDP's thread
* and registering interfaces.
*/
void nhdp_init(void);
/**
* @brief Start NHDP's operational thread
*
* @return PID of NHDP's operational thread
* @return KERNEL_PID_UNDEF on error
*/
kernel_pid_t nhdp_start(void);
/**
* @brief Register an interface for NHDP operation with default values
*
* Registers the interface completely for NHDP operation. Registration includes a new
* Local Information Base entry, a new Interface Information Base and starting
* the periodical HELLO messaging.
*
* @note
* Default values are a hello interval of 2 seconds and a validity time
* of 6 seconds for propagated information.
*
* @param[in] if_pid PID of the interface
* @param[in] addr A local address of this interface represented in bytes
* @param[in] addr_size Length in bytes of the local address
* @param[in] addr_type AF type of the local address
* @param[in] max_pl_size Maximum payload size for packets send over this interface
*
* @return 0 on success
* @return -1 on error
* @return -2 on maximum number of interfaces registered
*/
int nhdp_register_if_default(kernel_pid_t if_pid, uint8_t *addr, size_t addr_size,
uint8_t addr_type, uint16_t max_pl_size);
/**
* @brief Register an interface for NHDP operation
*
* Registers the interface completely for NHDP operation. Registration includes a new
* Local Information Base entry, a new Interface Information Base and starting
* the periodical HELLO messaging.
*
* @param[in] if_pid PID of the interface
* @param[in] addr A local address of this interface represented in bytes
* @param[in] addr_size Length of the local address (number of bytes)
* @param[in] addr_type AF type of the given address
* @param[in] max_pl_size Maximum payload size for packets send over this interface
* @param[in] hello_int_ms Hello interval in ms for periodic message generation
* @param[in] val_time_ms Validity time in ms for propagated information
*
* @return 0 on success
* @return -1 on error
* @return -2 on maximum number of interfaces registered
*/
int nhdp_register_if(kernel_pid_t if_pid, uint8_t *addr, size_t addr_size, uint8_t addr_type,
uint16_t max_pl_size, uint16_t hello_int_ms, uint16_t val_time_ms);
/**
* @brief Register a non MANET interface in NHDP
*
* The registered interface does not take part in NHDP operation. Its addresses
* will be represented only in other interfaces' messages. No periodical messages
* are created for this interface and no message processing is done.
*
* @param[in] if_pid PID of the interface
* @param[in] addr A local address of this interface represented in bytes
* @param[in] addr_size Length of the local address (number of bytes)
* @param[in] addr_type AF type of the given address
*
* @return 0 on success
* @return -1 on error
*/
int nhdp_register_non_manet_if(kernel_pid_t if_pid, uint8_t *addr, size_t addr_size,
uint8_t addr_type);
/**
* @brief Register an additional address for an interface in NHDP
*
* The address is added to the Local Information Base entry of this interface and
* will afterwards be propagated as a local address in newly created HELLO messages.
*
* @param[in] if_pid PID of the interface
* @param[in] addr Additional local address of this interface represented in bytes
* @param[in] addr_size Length of the local address (number of bytes)
* @param[in] addr_type AF type of the given address
*
* @return 0 on success
* @return -1 on error
*/
int nhdp_add_address(kernel_pid_t if_pid, uint8_t *addr, size_t addr_size, uint8_t addr_type);
#ifdef __cplusplus
}
#endif
#endif /* NHDP_H_ */
/** @} */
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