projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| cf040064 KS |
1 | /* |
| 2 | * Copyright (c) 1988 Stephen Deering. | |
| 3 | * Copyright (c) 1992 Regents of the University of California. | |
| 4 | * All rights reserved. | |
| 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 | * | |
| 11 | * @(#)igmp_var.h 7.1 (Berkeley) %G% | |
| 12 | */ | |
| 13 | ||
| 14 | /* | |
| 15 | * Internet Group Management Protocol (IGMP), | |
| 16 | * implementation-specific definitions. | |
| 17 | * | |
| 18 | * Written by Steve Deering, Stanford, May 1988. | |
| 19 | * | |
| 20 | * MULTICAST 1.1 | |
| 21 | */ | |
| 22 | ||
| 23 | struct igmpstat { | |
| 24 | u_int igps_rcv_total; /* total IGMP messages received */ | |
| 25 | u_int igps_rcv_tooshort; /* received with too few bytes */ | |
| 26 | u_int igps_rcv_badsum; /* received with bad checksum */ | |
| 27 | u_int igps_rcv_queries; /* received membership queries */ | |
| 28 | u_int igps_rcv_badqueries; /* received invalid queries */ | |
| 29 | u_int igps_rcv_reports; /* received membership reports */ | |
| 30 | u_int igps_rcv_badreports; /* received invalid reports */ | |
| 31 | u_int igps_rcv_ourreports; /* received reports for our groups */ | |
| 32 | u_int igps_snd_reports; /* sent membership reports */ | |
| 33 | }; | |
| 34 | ||
| 35 | #ifdef KERNEL | |
| 36 | struct igmpstat igmpstat; | |
| 37 | ||
| 38 | /* | |
| 39 | * Macro to compute a random timer value between 1 and (IGMP_MAX_REPORTING_ | |
| 40 | * DELAY * countdown frequency). We generate a "random" number by adding | |
| 41 | * the total number of IP packets received, our primary IP address, and the | |
| 42 | * multicast address being timed-out. The 4.3 random() routine really | |
| 43 | * ought to be available in the kernel! | |
| 44 | */ | |
| 45 | #define IGMP_RANDOM_DELAY(multiaddr) \ | |
| 46 | /* struct in_addr multiaddr; */ \ | |
| 47 | ( (ipstat.ips_total + \ | |
| 48 | ntohl(IA_SIN(in_ifaddr)->sin_addr.s_addr) + \ | |
| 49 | ntohl((multiaddr).s_addr) \ | |
| 50 | ) \ | |
| 51 | % (IGMP_MAX_HOST_REPORT_DELAY * PR_FASTHZ) + 1 \ | |
| 52 | ) | |
| 53 | ||
| 54 | void igmp_init __P(()); | |
| 55 | void igmp_input __P((struct mbuf *, struct ifnet *)); | |
| 56 | void igmp_joingroup __P((struct in_multi *)); | |
| 57 | void igmp_leavegroup __P((struct in_multi *)); | |
| 58 | void igmp_fasttimo __P(()); | |
| 59 | #endif | |
| 60 |