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/**
* @file
*
* DHCPv6 client: IPv6 address autoconfiguration as per
* RFC 3315 (stateful DHCPv6) and
* RFC 3736 (stateless DHCPv6).
*/
/*
* Copyright (c) 2018 Simon Goldschmidt
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*/
#ifndef LWIP_HDR_IP6_DHCP6_H
#define LWIP_HDR_IP6_DHCP6_H
#include "lwip/opt.h"
#if LWIP_IPV6_DHCP6 /* don't build if not configured for use in lwipopts.h */
#include "lwip/err.h"
#include "lwip/netif.h"
#ifdef __cplusplus
extern "C" {
#endif
/** period (in milliseconds) of the application calling dhcp6_tmr() */
#define DHCP6_TIMER_MSECS 500
struct dhcp6
{
/** transaction identifier of last sent request */
u32_t xid;
/** track PCB allocation state */
u8_t pcb_allocated;
/** current DHCPv6 state machine state */
u8_t state;
/** retries of current request */
u8_t tries;
/** if request config is triggered while another action is active, this keeps track of it */
u8_t request_config_pending;
/** #ticks with period DHCP6_TIMER_MSECS for request timeout */
u16_t request_timeout;
#if LWIP_IPV6_DHCP6_STATEFUL
/* @todo: add more members here to keep track of stateful DHCPv6 data, like lease times */
#endif /* LWIP_IPV6_DHCP6_STATEFUL */
};
void dhcp6_set_struct(struct netif *netif, struct dhcp6 *dhcp6);
/** Remove a struct dhcp6 previously set to the netif using dhcp6_set_struct() */
#define dhcp6_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL)
void dhcp6_cleanup(struct netif *netif);
err_t dhcp6_enable_stateful(struct netif *netif);
err_t dhcp6_enable_stateless(struct netif *netif);
void dhcp6_disable(struct netif *netif);
void dhcp6_tmr(void);
void dhcp6_nd6_ra_trigger(struct netif *netif, u8_t managed_addr_config, u8_t other_config);
#if LWIP_DHCP6_GET_NTP_SRV
/** This function must exist, in other to add offered NTP servers to
* the NTP (or SNTP) engine.
* See LWIP_DHCP6_MAX_NTP_SERVERS */
extern void dhcp6_set_ntp_servers(u8_t num_ntp_servers, const ip_addr_t* ntp_server_addrs);
#endif /* LWIP_DHCP6_GET_NTP_SRV */
#define netif_dhcp6_data(netif) ((struct dhcp6*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6))
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV6_DHCP6 */
#endif /* LWIP_HDR_IP6_DHCP6_H */
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