107 lines
3.8 KiB
C
107 lines
3.8 KiB
C
/*
|
|
* 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_IGMP_H__
|
|
#define __LWIP_IGMP_H__
|
|
|
|
#include "lwip/opt.h"
|
|
#include "lwip/ip_addr.h"
|
|
#include "lwip/netif.h"
|
|
#include "lwip/pbuf.h"
|
|
|
|
#if 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)
|
|
|
|
/* MAC Filter Actions, these are passed to a netif's
|
|
* igmp_mac_filter callback function. */
|
|
#define IGMP_DEL_MAC_FILTER 0
|
|
#define IGMP_ADD_MAC_FILTER 1
|
|
|
|
|
|
/**
|
|
* 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;
|
|
/** interface on which the group is active */
|
|
struct netif *netif;
|
|
/** multicast address */
|
|
ip_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, ip_addr_t *addr);
|
|
void igmp_input(struct pbuf *p, struct netif *inp, ip_addr_t *dest);
|
|
err_t igmp_joingroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
|
|
err_t igmp_leavegroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
|
|
void igmp_tmr(void);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* LWIP_IGMP */
|
|
|
|
#endif /* __LWIP_IGMP_H__ */
|