[457] | 1 | /**
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| 2 | * @file
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| 3 | * IGMP protocol definitions
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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| 8 | * All rights reserved.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without modification,
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| 11 | * are permitted provided that the following conditions are met:
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| 12 | *
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| 13 | * 1. Redistributions of source code must retain the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 16 | * this list of conditions and the following disclaimer in the documentation
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| 17 | * and/or other materials provided with the distribution.
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| 18 | * 3. The name of the author may not be used to endorse or promote products
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| 19 | * derived from this software without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 30 | * OF SUCH DAMAGE.
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| 31 | *
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| 32 | * This file is part of the lwIP TCP/IP stack.
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| 33 | *
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| 34 | * Author: Adam Dunkels <adam@sics.se>
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| 35 | *
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| 36 | */
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| 37 | #ifndef LWIP_HDR_PROT_IGMP_H
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| 38 | #define LWIP_HDR_PROT_IGMP_H
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| 39 |
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| 40 | #include "lwip/arch.h"
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| 41 | #include "lwip/prot/ip4.h"
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| 42 |
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| 43 | #ifdef __cplusplus
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| 44 | extern "C" {
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| 45 | #endif
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| 46 |
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| 47 | /*
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| 48 | * IGMP constants
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| 49 | */
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| 50 | #define IGMP_TTL 1
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| 51 | #define IGMP_MINLEN 8
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| 52 | #define ROUTER_ALERT 0x9404U
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| 53 | #define ROUTER_ALERTLEN 4
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| 54 |
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| 55 | /*
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| 56 | * IGMP message types, including version number.
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| 57 | */
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| 58 | #define IGMP_MEMB_QUERY 0x11 /* Membership query */
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| 59 | #define IGMP_V1_MEMB_REPORT 0x12 /* Ver. 1 membership report */
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| 60 | #define IGMP_V2_MEMB_REPORT 0x16 /* Ver. 2 membership report */
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| 61 | #define IGMP_LEAVE_GROUP 0x17 /* Leave-group message */
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| 62 |
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| 63 | /* Group membership states */
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| 64 | #define IGMP_GROUP_NON_MEMBER 0
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| 65 | #define IGMP_GROUP_DELAYING_MEMBER 1
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| 66 | #define IGMP_GROUP_IDLE_MEMBER 2
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| 67 |
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| 68 | /**
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| 69 | * IGMP packet format.
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| 70 | */
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| 71 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 72 | # include "arch/bpstruct.h"
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| 73 | #endif
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| 74 | PACK_STRUCT_BEGIN
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| 75 | struct igmp_msg {
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| 76 | PACK_STRUCT_FLD_8(u8_t igmp_msgtype);
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| 77 | PACK_STRUCT_FLD_8(u8_t igmp_maxresp);
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| 78 | PACK_STRUCT_FIELD(u16_t igmp_checksum);
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| 79 | PACK_STRUCT_FLD_S(ip4_addr_p_t igmp_group_address);
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| 80 | } PACK_STRUCT_STRUCT;
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| 81 | PACK_STRUCT_END
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| 82 | #ifdef PACK_STRUCT_USE_INCLUDES
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| 83 | # include "arch/epstruct.h"
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| 84 | #endif
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| 85 |
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| 86 | #ifdef __cplusplus
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| 87 | }
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| 88 | #endif
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| 89 |
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| 90 | #endif /* LWIP_HDR_PROT_IGMP_H */
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