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/**
* @file
* IGMP API
*/
/*
* Copyright (c) 2002 CITEL 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. Neither the name of CITEL Technologies Ltd 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 CITEL TECHNOLOGIES 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 CITEL TECHNOLOGIES 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.
*
* This file is a contribution to the lwIP TCP/IP stack.
* The Swedish Institute of Computer Science and Adam Dunkels
* are specifically granted permission to redistribute this
* source code.
*/
#ifndef LWIP_HDR_IGMP_H
#define LWIP_HDR_IGMP_H
#include "lwip/opt.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/pbuf.h"
#if LWIP_IPV4 && LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
#ifdef __cplusplus
extern "C" {
#endif
/* IGMP timer */
#define IGMP_TMR_INTERVAL 100 /* Milliseconds */
#define IGMP_V1_DELAYING_MEMBER_TMR (1000/IGMP_TMR_INTERVAL)
#define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
/* Compatibility defines (don't use for new code) */
#define IGMP_DEL_MAC_FILTER NETIF_DEL_MAC_FILTER
#define IGMP_ADD_MAC_FILTER NETIF_ADD_MAC_FILTER
/**
* igmp group structure - there is
* a list of groups for each interface
* these should really be linked from the interface, but
* if we keep them separate we will not affect the lwip original code
* too much
*
* There will be a group for the all systems group address but this
* will not run the state machine as it is used to kick off reports
* from all the other groups
*/
struct igmp_group {
/** next link */
struct igmp_group *next;
/** multicast address */
ip4_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, negative is OFF */
u16_t timer;
/** counter of simultaneous uses */
u8_t use;
};
/* Prototypes */
void igmp_init(void);
err_t igmp_start(struct netif *netif);
err_t igmp_stop(struct netif *netif);
void igmp_report_groups(struct netif *netif);
struct igmp_group *igmp_lookfor_group(struct netif *ifp, const ip4_addr_t *addr);
void igmp_input(struct pbuf *p, struct netif *inp, const ip4_addr_t *dest);
err_t igmp_joingroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr);
err_t igmp_joingroup_netif(struct netif *netif, const ip4_addr_t *groupaddr);
err_t igmp_leavegroup(const ip4_addr_t *ifaddr, const ip4_addr_t *groupaddr);
err_t igmp_leavegroup_netif(struct netif *netif, const ip4_addr_t *groupaddr);
void igmp_tmr(void);
/** @ingroup igmp
* Get list head of IGMP groups for netif.
* Note: The allsystems group IP is contained in the list as first entry.
* @see @ref netif_set_igmp_mac_filter()
*/
#define netif_igmp_data(netif) ((struct igmp_group *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_IGMP))
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IPV4 && LWIP_IGMP */
#endif /* LWIP_HDR_IGMP_H */