107 lines
3.8 KiB
C
107 lines
3.8 KiB
C
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/*
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* Copyright (c) 2002 CITEL 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
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is a contribution to the lwIP TCP/IP stack.
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* The Swedish Institute of Computer Science and Adam Dunkels
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* are specifically granted permission to redistribute this
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* source code.
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*/
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#ifndef __LWIP_IGMP_H__
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#define __LWIP_IGMP_H__
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#include "lwip/opt.h"
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#include "lwip/ip_addr.h"
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#include "lwip/netif.h"
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#include "lwip/pbuf.h"
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#if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* IGMP timer */
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#define IGMP_TMR_INTERVAL 100 /* Milliseconds */
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#define IGMP_V1_DELAYING_MEMBER_TMR (1000/IGMP_TMR_INTERVAL)
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#define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
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/* MAC Filter Actions, these are passed to a netif's
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* igmp_mac_filter callback function. */
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#define IGMP_DEL_MAC_FILTER 0
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#define IGMP_ADD_MAC_FILTER 1
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/**
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* igmp group structure - there is
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* a list of groups for each interface
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* these should really be linked from the interface, but
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* if we keep them separate we will not affect the lwip original code
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* too much
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*
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* There will be a group for the all systems group address but this
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* will not run the state machine as it is used to kick off reports
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* from all the other groups
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*/
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struct igmp_group {
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/** next link */
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struct igmp_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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ip_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, negative is OFF */
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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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/* Prototypes */
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void igmp_init(void);
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err_t igmp_start(struct netif *netif);
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err_t igmp_stop(struct netif *netif);
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void igmp_report_groups(struct netif *netif);
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struct igmp_group *igmp_lookfor_group(struct netif *ifp, ip_addr_t *addr);
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void igmp_input(struct pbuf *p, struct netif *inp, ip_addr_t *dest);
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err_t igmp_joingroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
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err_t igmp_leavegroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
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void igmp_tmr(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_IGMP */
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#endif /* __LWIP_IGMP_H__ */
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