| /** |
| * @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 */ |
