minix3/lib/liblwip/include/ipv6/lwip/mld6.h

119 lines
3.8 KiB
C

/**
* @file
*
* Multicast listener discovery for IPv6. Aims to be compliant with RFC 2710.
* No support for MLDv2.
*/
/*
* Copyright (c) 2010 Inico Technologies Ltd.
* 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: Ivan Delamer <delamer@inicotech.com>
*
*
* Please coordinate changes and requests with Ivan Delamer
* <delamer@inicotech.com>
*/
#ifndef __LWIP_MLD6_H__
#define __LWIP_MLD6_H__
#include "lwip/opt.h"
#if LWIP_IPV6_MLD && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
#include "lwip/pbuf.h"
#include "lwip/netif.h"
#ifdef __cplusplus
extern "C" {
#endif
struct mld_group {
/** next link */
struct mld_group *next;
/** interface on which the group is active */
struct netif *netif;
/** multicast address */
ip6_addr_t group_address;
/** signifies we were the last person to report */
u8_t last_reporter_flag;
/** current state of the group */
u8_t group_state;
/** timer for reporting */
u16_t timer;
/** counter of simultaneous uses */
u8_t use;
};
/** Multicast listener report/query/done message header. */
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct mld_header {
PACK_STRUCT_FIELD(u8_t type);
PACK_STRUCT_FIELD(u8_t code);
PACK_STRUCT_FIELD(u16_t chksum);
PACK_STRUCT_FIELD(u16_t max_resp_delay);
PACK_STRUCT_FIELD(u16_t reserved);
PACK_STRUCT_FIELD(ip6_addr_p_t multicast_address);
/* Options follow. */
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#define MLD6_TMR_INTERVAL 100 /* Milliseconds */
/* MAC Filter Actions, these are passed to a netif's
* mld_mac_filter callback function. */
#define MLD6_DEL_MAC_FILTER 0
#define MLD6_ADD_MAC_FILTER 1
#define mld6_init() /* TODO should we init tables? */
err_t mld6_stop(struct netif *netif);
void mld6_report_groups(struct netif *netif);
void mld6_tmr(void);
struct mld_group *mld6_lookfor_group(struct netif *ifp, ip6_addr_t *addr);
void mld6_input(struct pbuf *p, struct netif *inp);
err_t mld6_joingroup(ip6_addr_t *srcaddr, ip6_addr_t *groupaddr);
err_t mld6_leavegroup(ip6_addr_t *srcaddr, ip6_addr_t *groupaddr);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV6_MLD && LWIP_IPV6 */
#endif /* __LWIP_MLD6_H__ */