119 lines
3.8 KiB
C
119 lines
3.8 KiB
C
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/**
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* @file
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*
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* Multicast listener discovery for IPv6. Aims to be compliant with RFC 2710.
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* No support for MLDv2.
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*/
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/*
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* Copyright (c) 2010 Inico Technologies Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Ivan Delamer <delamer@inicotech.com>
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*
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*
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* Please coordinate changes and requests with Ivan Delamer
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* <delamer@inicotech.com>
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*/
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#ifndef __LWIP_MLD6_H__
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#define __LWIP_MLD6_H__
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#include "lwip/opt.h"
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#if LWIP_IPV6_MLD && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
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#include "lwip/pbuf.h"
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#include "lwip/netif.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct mld_group {
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/** next link */
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struct mld_group *next;
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/** interface on which the group is active */
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struct netif *netif;
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/** multicast address */
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ip6_addr_t group_address;
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/** signifies we were the last person to report */
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u8_t last_reporter_flag;
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/** current state of the group */
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u8_t group_state;
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/** timer for reporting */
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u16_t timer;
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/** counter of simultaneous uses */
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u8_t use;
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};
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/** Multicast listener report/query/done message header. */
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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struct mld_header {
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PACK_STRUCT_FIELD(u8_t type);
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PACK_STRUCT_FIELD(u8_t code);
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PACK_STRUCT_FIELD(u16_t chksum);
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PACK_STRUCT_FIELD(u16_t max_resp_delay);
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PACK_STRUCT_FIELD(u16_t reserved);
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PACK_STRUCT_FIELD(ip6_addr_p_t multicast_address);
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/* Options follow. */
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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#define MLD6_TMR_INTERVAL 100 /* Milliseconds */
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/* MAC Filter Actions, these are passed to a netif's
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* mld_mac_filter callback function. */
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#define MLD6_DEL_MAC_FILTER 0
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#define MLD6_ADD_MAC_FILTER 1
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#define mld6_init() /* TODO should we init tables? */
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err_t mld6_stop(struct netif *netif);
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void mld6_report_groups(struct netif *netif);
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void mld6_tmr(void);
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struct mld_group *mld6_lookfor_group(struct netif *ifp, ip6_addr_t *addr);
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void mld6_input(struct pbuf *p, struct netif *inp);
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err_t mld6_joingroup(ip6_addr_t *srcaddr, ip6_addr_t *groupaddr);
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err_t mld6_leavegroup(ip6_addr_t *srcaddr, ip6_addr_t *groupaddr);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_IPV6_MLD && LWIP_IPV6 */
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#endif /* __LWIP_MLD6_H__ */
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