fb11e647
 vrobic
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/*
* Copyright (C) 2014 Martin Landsmann <Martin.Landsmann@HAW-Hamburg.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.
*/
/**
* @ingroup net_fib
* @{
*
* @file
* @brief Types and functions for operating fib tables
*
* @author Martin Landsmann <martin.landsmann@haw-hamburg.de>
*/
#ifndef FIB_TABLE_H_
#define FIB_TABLE_H_
#include <stdint.h>
#include "kernel_types.h"
#include "universal_address.h"
#include "mutex.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief maximum number of handled routing protocols (RP)
* used to notify the saved kernel_pid_t on unreachable destination
*/
#define FIB_MAX_REGISTERED_RP (5)
/**
* @brief Container descriptor for a FIB entry
*/
typedef struct {
/** interface ID */
kernel_pid_t iface_id;
/** Lifetime of this entry (an absolute time-point is stored by the FIB) */
uint64_t lifetime;
/** Unique identifier for the type of the global address */
uint32_t global_flags;
/** Pointer to the shared generic address */
universal_address_container_t *global;
/** Unique identifier for the type of the next hop address */
uint32_t next_hop_flags;
/** Pointer to the shared generic address */
universal_address_container_t *next_hop;
} fib_entry_t;
/**
* @brief Container descriptor for a FIB source route entry
*/
typedef struct fib_sr_entry {
/** Pointer to the shared generic address */
universal_address_container_t *address;
/** Pointer to the next shared generic address on the source route */
struct fib_sr_entry *next;
} fib_sr_entry_t;
/**
* @brief Container descriptor for a FIB source route
*/
typedef struct {
/** interface ID */
kernel_pid_t sr_iface_id;
/** Lifetime of this entry (an absolute time-point is stored by the FIB) */
uint64_t sr_lifetime;
/** Flags for this source route */
uint32_t sr_flags;
/** Pointer to the first hop on the source route */
fib_sr_entry_t *sr_path;
/** Pointer to the destination of the source route */
fib_sr_entry_t *sr_dest;
} fib_sr_t;
/**
* @brief Container for one FIB source route table,
* combining source routes and an entry pool
*/
typedef struct {
/** pointer to source route header array */
fib_sr_t *headers;
/** pointer to entry pool array holding all hop entries for this table */
fib_sr_entry_t *entry_pool;
/** the maximum number of elements in the entry pool */
size_t entry_pool_size;
} fib_sr_meta_t;
/**
* @brief FIB table type for single hop entries
*/
#define FIB_TABLE_TYPE_SH (1)
/**
* @brief FIB table type for source routes
*/
#define FIB_TABLE_TYPE_SR (FIB_TABLE_TYPE_SH + 1)
/**
* @brief Meta information of a FIB table
*/
typedef struct {
/** A single hop OR source route data array */
union{
/** array holding the FIB entries for single hops */
fib_entry_t *entries;
/** array holding the FIB entries for source routes */
fib_sr_meta_t *source_routes;
}data;
/** the kind of this FIB table, single hop or source route.
* This value indicates what is stored in `data` of this table
*/
uint8_t table_type;
/** the maximim number of entries in this FIB table */
size_t size;
/** table access mutex to grant exclusive operations on calls */
mutex_t mtx_access;
/** current number of registered RPs. */
size_t notify_rp_pos;
/** the kernel_pid_t of the registered RPs.
* Used to notify the RPs by the FIB on certain conditions,
* e.g. when a destination is unreachable
*/
kernel_pid_t notify_rp[FIB_MAX_REGISTERED_RP];
/** the prefix handled by each registered RP.
* Used to dispatch if the RP is responsible for the condition,
* e.g. when the unreachable destination is covered by the prefix
*/
universal_address_container_t* prefix_rp[FIB_MAX_REGISTERED_RP];
} fib_table_t;
#ifdef __cplusplus
}
#endif
#endif /* FIB_TABLE_H_ */
/** @} */
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