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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_ipv6 IPv6
* @ingroup net_gnrc
* @brief GNRC's IPv6 implementation
*
* The IPv6 control thread understands messages of type
*
* * @ref GNRC_NETAPI_MSG_TYPE_RCV, and
* * @ref GNRC_NETAPI_MSG_TYPE_SND,
*
* @{
*
* @file
* @brief Definitions for GNRC's IPv6 implementation
*
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
* @author Oliver Hahm <oliver.hahm@inria.fr>
*/
#ifndef GNRC_IPV6_H_
#define GNRC_IPV6_H_
#include "kernel_types.h"
#include "net/gnrc.h"
#include "thread.h"
#include "net/ipv6.h"
#include "net/gnrc/ipv6/ext.h"
#include "net/gnrc/ipv6/hdr.h"
#include "net/gnrc/ipv6/nc.h"
#include "net/gnrc/ipv6/netif.h"
#ifdef MODULE_FIB
#include "net/fib.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Default stack size to use for the IPv6 thread
*/
#ifndef GNRC_IPV6_STACK_SIZE
#define GNRC_IPV6_STACK_SIZE (THREAD_STACKSIZE_DEFAULT)
#endif
/**
* @brief Default priority for the IPv6 thread
*/
#ifndef GNRC_IPV6_PRIO
#define GNRC_IPV6_PRIO (THREAD_PRIORITY_MAIN - 3)
#endif
/**
* @brief Default message queue size to use for the IPv6 thread.
*/
#ifndef GNRC_IPV6_MSG_QUEUE_SIZE
#define GNRC_IPV6_MSG_QUEUE_SIZE (8U)
#endif
/**
* @brief The PID to the IPv6 thread.
*
* @note Use @ref gnrc_ipv6_init() to initialize. **Do not set by hand**.
*
* @details This variable is preferred for IPv6 internal communication *only*.
* Please use @ref net_gnrc_netreg for external communication.
*/
extern kernel_pid_t gnrc_ipv6_pid;
#ifdef MODULE_FIB
/**
* @brief Maximum number of entries in the IPv6 FIB table.
*/
#ifndef GNRC_IPV6_FIB_TABLE_SIZE
# ifdef MODULE_GNRC_RPL
# define GNRC_IPV6_FIB_TABLE_SIZE (20)
# else
# define GNRC_IPV6_FIB_TABLE_SIZE (5)
# endif
#endif
/**
* @brief The forwarding information base (FIB) for the IPv6 stack.
*
* @see @ref net_fib
*/
extern fib_table_t gnrc_ipv6_fib_table;
#endif
/**
* @brief Initialization of the IPv6 thread.
*
* @return The PID to the IPv6 thread, on success.
* @return a negative errno on error.
* @return -EOVERFLOW, if there are too many threads running already
* @return -EEXIST, if IPv6 was already initialized.
*/
kernel_pid_t gnrc_ipv6_init(void);
/**
* @brief Demultiplexes a packet according to @p nh.
*
* @internal
*
* **Do not use outside this module or its submodules!!!**
* Public access needed for Extension Headers.
*
* About `current` and `pkt`:
*
* current pkt
* | |
* v v
* IPv6 <- IPv6_EXT <- IPv6_EXT <- UNDEF
*
* This situation may happen when the packet has a source routing extension
* header (RFC 6554), and the packet is forwarded from an interface to another.
*
* @param[in] iface The receiving interface.
* @param[in] current A snip to process.
* @param[in] pkt A packet.
* @param[in] nh A protocol number (see @ref net_protnum) of the current snip.
*/
void gnrc_ipv6_demux(kernel_pid_t iface, gnrc_pktsnip_t *current, gnrc_pktsnip_t *pkt, uint8_t nh);
/**
* @brief Get the IPv6 header from a given list of @ref gnrc_pktsnip_t
*
* This function may be used with e.g. a pointer to a (full) UDP datagram.
*
* @param[in] pkt The pointer to the first @ref gnrc_pktsnip_t of the
* packet.
*
* @return A pointer to the @ref ipv6_hdr_t of the packet.
* @return NULL if the packet does not contain an IPv6 header.
*/
ipv6_hdr_t *gnrc_ipv6_get_header(gnrc_pktsnip_t *pkt);
#ifdef __cplusplus
}
#endif
#endif /* GNRC_IPV6_H_ */
/**
* @}
*/
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