projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 0720a479 KS |
1 | /* |
| 2 | * Copyright (c) 1988 Stephen Deering. | |
| e7a3707f KB |
3 | * Copyright (c) 1992, 1993 |
| 4 | * The Regents of the University of California. All rights reserved. | |
| 0720a479 KS |
5 | * |
| 6 | * This code is derived from software contributed to Berkeley by | |
| 7 | * Stephen Deering of Stanford University. | |
| 8 | * | |
| 9 | * %sccs.include.redist.c% | |
| 10 | * | |
| e7a3707f | 11 | * @(#)igmp.h 8.1 (Berkeley) %G% |
| 0720a479 KS |
12 | */ |
| 13 | ||
| 14 | /* Internet Group Management Protocol (IGMP) definitions. */ | |
| 15 | ||
| 16 | /* | |
| 17 | * IGMP packet format. | |
| 18 | */ | |
| 19 | struct igmp { | |
| 20 | u_char igmp_type; /* version & type of IGMP message */ | |
| 21 | u_char igmp_code; /* unused, should be zero */ | |
| 22 | u_short igmp_cksum; /* IP-style checksum */ | |
| 23 | struct in_addr igmp_group; /* group address being reported */ | |
| 24 | }; /* (zero for queries) */ | |
| 25 | ||
| 26 | #define IGMP_MINLEN 8 | |
| 27 | ||
| 28 | #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* message types, incl. version */ | |
| 29 | #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 | |
| 30 | #define IGMP_DVMRP 0x13 /* for experimental multicast */ | |
| 31 | /* routing protocol */ | |
| 32 | ||
| 33 | #define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */ |