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/**
* @file
* IGMP protocol definitions
*/
/*
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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 part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef LWIP_HDR_PROT_IGMP_H
#define LWIP_HDR_PROT_IGMP_H
#include "lwip/arch.h"
#include "lwip/prot/ip4.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* IGMP constants
*/
#define IGMP_TTL 1
#define IGMP_MINLEN 8
#define ROUTER_ALERT 0x9404U
#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 */
/* 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_FLD_8(u8_t igmp_msgtype);
PACK_STRUCT_FLD_8(u8_t igmp_maxresp);
PACK_STRUCT_FIELD(u16_t igmp_checksum);
PACK_STRUCT_FLD_S(ip4_addr_p_t igmp_group_address);
} PACK_STRUCT_STRUCT;
PACK_STRUCT_END
#ifdef PACK_STRUCT_USE_INCLUDES
# include "arch/epstruct.h"
#endif
#ifdef __cplusplus
}
#endif
#endif /* LWIP_HDR_PROT_IGMP_H */
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