contiki/core/net/ipv6/uip-ds6-route.h

211 lines
7.6 KiB
C

/*
* Copyright (c) 2012, Thingsquare, http://www.thingsquare.com/.
* 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 copyright holder 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 COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*
*/
/**
* \addtogroup uip6
* @{
*/
/**
* \file
* Header file for routing table manipulation
*/
#ifndef UIP_DS6_ROUTE_H
#define UIP_DS6_ROUTE_H
#include "net/ip/uip.h"
#include "net/nbr-table.h"
#include "sys/stimer.h"
#include "lib/list.h"
NBR_TABLE_DECLARE(nbr_routes);
void uip_ds6_route_init(void);
#ifndef UIP_CONF_UIP_DS6_NOTIFICATIONS
#define UIP_DS6_NOTIFICATIONS 1
#else
#define UIP_DS6_NOTIFICATIONS UIP_CONF_UIP_DS6_NOTIFICATIONS
#endif
#if UIP_DS6_NOTIFICATIONS
/* Event constants for the uip-ds6 route notification interface. The
notification interface allows for a user program to be notified via
a callback when a route has been added or removed and when the
system has added or removed a default route. */
#define UIP_DS6_NOTIFICATION_DEFRT_ADD 0
#define UIP_DS6_NOTIFICATION_DEFRT_RM 1
#define UIP_DS6_NOTIFICATION_ROUTE_ADD 2
#define UIP_DS6_NOTIFICATION_ROUTE_RM 3
typedef void (* uip_ds6_notification_callback)(int event,
uip_ipaddr_t *route,
uip_ipaddr_t *nexthop,
int num_routes);
struct uip_ds6_notification {
struct uip_ds6_notification *next;
uip_ds6_notification_callback callback;
};
void uip_ds6_notification_add(struct uip_ds6_notification *n,
uip_ds6_notification_callback c);
void uip_ds6_notification_rm(struct uip_ds6_notification *n);
/*--------------------------------------------------*/
#endif
/* Routing table */
#ifndef UIP_CONF_MAX_ROUTES
#ifdef UIP_CONF_DS6_ROUTE_NBU
#define UIP_DS6_ROUTE_NB UIP_CONF_DS6_ROUTE_NBU
#else /* UIP_CONF_DS6_ROUTE_NBU */
#define UIP_DS6_ROUTE_NB 4
#endif /* UIP_CONF_DS6_ROUTE_NBU */
#else /* UIP_CONF_MAX_ROUTES */
#define UIP_DS6_ROUTE_NB UIP_CONF_MAX_ROUTES
#endif /* UIP_CONF_MAX_ROUTES */
/** \brief define some additional RPL related route state and
* neighbor callback for RPL - if not a DS6_ROUTE_STATE is already set */
#ifndef UIP_DS6_ROUTE_STATE_TYPE
#define UIP_DS6_ROUTE_STATE_TYPE rpl_route_entry_t
/* Needed for the extended route entry state when using ContikiRPL */
#define RPL_ROUTE_ENTRY_NOPATH_RECEIVED 0x01
#define RPL_ROUTE_ENTRY_DAO_PENDING 0x02
#define RPL_ROUTE_ENTRY_DAO_NACK 0x04
#define RPL_ROUTE_IS_NOPATH_RECEIVED(route) \
(((route)->state.state_flags & RPL_ROUTE_ENTRY_NOPATH_RECEIVED) != 0)
#define RPL_ROUTE_SET_NOPATH_RECEIVED(route) do { \
(route)->state.state_flags |= RPL_ROUTE_ENTRY_NOPATH_RECEIVED; \
} while(0)
#define RPL_ROUTE_CLEAR_NOPATH_RECEIVED(route) do { \
(route)->state.state_flags &= ~RPL_ROUTE_ENTRY_NOPATH_RECEIVED; \
} while(0)
#define RPL_ROUTE_IS_DAO_PENDING(route) \
((route->state.state_flags & RPL_ROUTE_ENTRY_DAO_PENDING) != 0)
#define RPL_ROUTE_SET_DAO_PENDING(route) do { \
(route)->state.state_flags |= RPL_ROUTE_ENTRY_DAO_PENDING; \
} while(0)
#define RPL_ROUTE_CLEAR_DAO_PENDING(route) do { \
(route)->state.state_flags &= ~RPL_ROUTE_ENTRY_DAO_PENDING; \
} while(0)
#define RPL_ROUTE_IS_DAO_NACKED(route) \
((route->state.state_flags & RPL_ROUTE_ENTRY_DAO_NACK) != 0)
#define RPL_ROUTE_SET_DAO_NACKED(route) do { \
(route)->state.state_flags |= RPL_ROUTE_ENTRY_DAO_NACK; \
} while(0)
#define RPL_ROUTE_CLEAR_DAO_NACKED(route) do { \
(route)->state.state_flags &= ~RPL_ROUTE_ENTRY_DAO_NACK; \
} while(0)
#define RPL_ROUTE_CLEAR_DAO(route) do { \
(route)->state.state_flags &= ~(RPL_ROUTE_ENTRY_DAO_NACK|RPL_ROUTE_ENTRY_DAO_PENDING); \
} while(0)
struct rpl_dag;
typedef struct rpl_route_entry {
uint32_t lifetime;
struct rpl_dag *dag;
uint8_t dao_seqno_out;
uint8_t dao_seqno_in;
uint8_t state_flags;
} rpl_route_entry_t;
#endif /* UIP_DS6_ROUTE_STATE_TYPE */
/** \brief The neighbor routes hold a list of routing table entries
that are attached to a specific neihbor. */
struct uip_ds6_route_neighbor_routes {
LIST_STRUCT(route_list);
};
/** \brief An entry in the routing table */
typedef struct uip_ds6_route {
struct uip_ds6_route *next;
/* Each route entry belongs to a specific neighbor. That neighbor
holds a list of all routing entries that go through it. The
routes field point to the uip_ds6_route_neighbor_routes that
belong to the neighbor table entry that this routing table entry
uses. */
struct uip_ds6_route_neighbor_routes *neighbor_routes;
uip_ipaddr_t ipaddr;
#ifdef UIP_DS6_ROUTE_STATE_TYPE
UIP_DS6_ROUTE_STATE_TYPE state;
#endif
uint8_t length;
} uip_ds6_route_t;
/** \brief A neighbor route list entry, used on the
uip_ds6_route->neighbor_routes->route_list list. */
struct uip_ds6_route_neighbor_route {
struct uip_ds6_route_neighbor_route *next;
struct uip_ds6_route *route;
};
/** \brief An entry in the default router list */
typedef struct uip_ds6_defrt {
struct uip_ds6_defrt *next;
uip_ipaddr_t ipaddr;
struct stimer lifetime;
uint8_t isinfinite;
} uip_ds6_defrt_t;
/** \name Default router list basic routines */
/** @{ */
uip_ds6_defrt_t *uip_ds6_defrt_add(uip_ipaddr_t *ipaddr,
unsigned long interval);
void uip_ds6_defrt_rm(uip_ds6_defrt_t *defrt);
uip_ds6_defrt_t *uip_ds6_defrt_lookup(uip_ipaddr_t *ipaddr);
uip_ipaddr_t *uip_ds6_defrt_choose(void);
void uip_ds6_defrt_periodic(void);
/** @} */
/** \name Routing Table basic routines */
/** @{ */
uip_ds6_route_t *uip_ds6_route_lookup(uip_ipaddr_t *destipaddr);
uip_ds6_route_t *uip_ds6_route_add(uip_ipaddr_t *ipaddr, uint8_t length,
uip_ipaddr_t *next_hop);
void uip_ds6_route_rm(uip_ds6_route_t *route);
void uip_ds6_route_rm_by_nexthop(uip_ipaddr_t *nexthop);
uip_ipaddr_t *uip_ds6_route_nexthop(uip_ds6_route_t *);
int uip_ds6_route_num_routes(void);
uip_ds6_route_t *uip_ds6_route_head(void);
uip_ds6_route_t *uip_ds6_route_next(uip_ds6_route_t *);
int uip_ds6_route_is_nexthop(const uip_ipaddr_t *ipaddr);
/** @} */
#endif /* UIP_DS6_ROUTE_H */
/** @} */