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/*
* 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 constants
*/
#define IP_PROTO_IGMP 2
#define IGMP_TTL 1
#define IGMP_MINLEN 8
#define ROUTER_ALERT 0x9404
#define ROUTER_ALERTLEN 4
/*
* IGMP message types, including version number.
*/
#define IGMP_MEMB_QUERY 0x11 /* Membership query */
#define IGMP_V1_MEMB_REPORT 0x12 /* Ver. 1 membership report */
#define IGMP_V2_MEMB_REPORT 0x16 /* Ver. 2 membership report */
#define IGMP_LEAVE_GROUP 0x17 /* Leave-group message */
/* 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 */
#define IGMP_DEL_MAC_FILTER 0
#define IGMP_ADD_MAC_FILTER 1
/* Group membership states */
#define IGMP_GROUP_NON_MEMBER 0
#define IGMP_GROUP_DELAYING_MEMBER 1
#define IGMP_GROUP_IDLE_MEMBER 2
/*
* IGMP packet format.
*/
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/bpstruct.h"
#endif
PACK_STRUCT_BEGIN
struct igmp_msg {
PACK_STRUCT_FIELD(u8_t igmp_msgtype);
PACK_STRUCT_FIELD(u8_t igmp_maxresp);
PACK_STRUCT_FIELD(u16_t igmp_checksum);
PACK_STRUCT_FIELD(struct ip_addr igmp_group_address);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
/*
* now a 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 {
struct igmp_group *next;
struct netif *interface;
struct ip_addr group_address;
u8_t last_reporter_flag; /* signifies we were the last person to report */
u8_t group_state;
u16_t timer;
u8_t use; /* counter of simultaneous uses */
};
/* 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, struct ip_addr *addr);
struct igmp_group *igmp_lookup_group( struct netif *ifp, struct ip_addr *addr);
err_t igmp_remove_group( struct igmp_group *group);
void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest);
err_t igmp_joingroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr);
err_t igmp_leavegroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr);
void igmp_tmr(void);
void igmp_timeout( struct igmp_group *group);
void igmp_start_timer( struct igmp_group *group, u8_t max_time);
void igmp_stop_timer( struct igmp_group *group);
void igmp_delaying_member( struct igmp_group *group, u8_t maxresp);
err_t igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t ttl, u8_t proto, struct netif *netif);
void igmp_send( struct igmp_group *group, u8_t type);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IGMP */
#endif /* __LWIP_IGMP_H__ */
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