Mistake on this page?
Report an issue in GitHub or email us
prot/igmp.h
Go to the documentation of this file.
1 /**
2  * @file
3  * IGMP protocol definitions
4  */
5 
6 /*
7  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without modification,
11  * are permitted provided that the following conditions are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright notice,
14  * this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  * 3. The name of the author may not be used to endorse or promote products
19  * derived from this software without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30  * OF SUCH DAMAGE.
31  *
32  * This file is part of the lwIP TCP/IP stack.
33  *
34  * Author: Adam Dunkels <adam@sics.se>
35  *
36  */
37 #ifndef LWIP_HDR_PROT_IGMP_H
38 #define LWIP_HDR_PROT_IGMP_H
39 
40 #include "lwip/arch.h"
41 #include "lwip/prot/ip4.h"
42 
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46 
47 /*
48  * IGMP constants
49  */
50 #define IGMP_TTL 1
51 #define IGMP_MINLEN 8
52 #define ROUTER_ALERT 0x9404U
53 #define ROUTER_ALERTLEN 4
54 
55 /*
56  * IGMP message types, including version number.
57  */
58 #define IGMP_MEMB_QUERY 0x11 /* Membership query */
59 #define IGMP_V1_MEMB_REPORT 0x12 /* Ver. 1 membership report */
60 #define IGMP_V2_MEMB_REPORT 0x16 /* Ver. 2 membership report */
61 #define IGMP_LEAVE_GROUP 0x17 /* Leave-group message */
62 
63 /* Group membership states */
64 #define IGMP_GROUP_NON_MEMBER 0
65 #define IGMP_GROUP_DELAYING_MEMBER 1
66 #define IGMP_GROUP_IDLE_MEMBER 2
67 
68 /**
69  * IGMP packet format.
70  */
71 #ifdef PACK_STRUCT_USE_INCLUDES
72 # include "arch/bpstruct.h"
73 #endif
75 struct igmp_msg {
76  PACK_STRUCT_FLD_8(u8_t igmp_msgtype);
77  PACK_STRUCT_FLD_8(u8_t igmp_maxresp);
78  PACK_STRUCT_FIELD(u16_t igmp_checksum);
79  PACK_STRUCT_FLD_S(ip4_addr_p_t igmp_group_address);
82 #ifdef PACK_STRUCT_USE_INCLUDES
83 # include "arch/epstruct.h"
84 #endif
85 
86 #ifdef __cplusplus
87 }
88 #endif
89 
90 #endif /* LWIP_HDR_PROT_IGMP_H */
IPv4 protocol definitions.
#define PACK_STRUCT_BEGIN
Packed structs support.
Definition: arch.h:307
#define PACK_STRUCT_STRUCT
Packed structs support.
Definition: arch.h:328
#define PACK_STRUCT_END
Packed structs support.
Definition: arch.h:316
Support for different processor and compiler architectures.
IGMP packet format.
Definition: prot/igmp.h:75
Important Information for this Arm website

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.