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/*
* Linux NET3: Internet Group Management Protocol [IGMP]
*
* Authors:
* Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* Extended to talk the BSD extended IGMP protocol of mrouted 3.6
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _LINUX_IGMP_H
#define _LINUX_IGMP_H
#include <linux/types.h>
#include <asm/byteorder.h>
/*
* IGMP protocol structures
*/
/*
* Header in on cable format
*/
struct igmphdr {
__u8 type;
__u8 code; /* For newer IGMP */
__sum16 csum;
__be32 group;
};
/* V3 group record types [grec_type] */
#define IGMPV3_MODE_IS_INCLUDE 1
#define IGMPV3_MODE_IS_EXCLUDE 2
#define IGMPV3_CHANGE_TO_INCLUDE 3
#define IGMPV3_CHANGE_TO_EXCLUDE 4
#define IGMPV3_ALLOW_NEW_SOURCES 5
#define IGMPV3_BLOCK_OLD_SOURCES 6
struct igmpv3_grec {
__u8 grec_type;
__u8 grec_auxwords;
__be16 grec_nsrcs;
__be32 grec_mca;
__be32 grec_src[0];
};
struct igmpv3_report {
__u8 type;
__u8 resv1;
__sum16 csum;
__be16 resv2;
__be16 ngrec;
struct igmpv3_grec grec[0];
};
struct igmpv3_query {
__u8 type;
__u8 code;
__sum16 csum;
__be32 group;
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8 qrv:3,
suppress:1,
resv:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
__u8 resv:4,
suppress:1,
qrv:3;
#else
#error "Please fix <asm/byteorder.h>"
#endif
__u8 qqic;
__be16 nsrcs;
__be32 srcs[0];
};
#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
#define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
#define IGMP_DVMRP 0x13 /* DVMRP routing */
#define IGMP_PIM 0x14 /* PIM routing */
#define IGMP_TRACE 0x15
#define IGMPV2_HOST_MEMBERSHIP_REPORT 0x16 /* V2 version of 0x12 */
#define IGMP_HOST_LEAVE_MESSAGE 0x17
#define IGMPV3_HOST_MEMBERSHIP_REPORT 0x22 /* V3 version of 0x12 */
#define IGMP_MTRACE_RESP 0x1e
#define IGMP_MTRACE 0x1f
/*
* Use the BSD names for these for compatibility
*/
#define IGMP_DELAYING_MEMBER 0x01
#define IGMP_IDLE_MEMBER 0x02
#define IGMP_LAZY_MEMBER 0x03
#define IGMP_SLEEPING_MEMBER 0x04
#define IGMP_AWAKENING_MEMBER 0x05
#define IGMP_MINLEN 8
#define IGMP_MAX_HOST_REPORT_DELAY 10 /* max delay for response to */
/* query (in seconds) */
#define IGMP_TIMER_SCALE 10 /* denotes that the igmphdr->timer field */
/* specifies time in 10th of seconds */
#define IGMP_AGE_THRESHOLD 400 /* If this host don't hear any IGMP V1 */
/* message in this period of time, */
/* revert to IGMP v2 router. */
#define IGMP_ALL_HOSTS htonl(0xE0000001L)
#define IGMP_ALL_ROUTER htonl(0xE0000002L)
#define IGMPV3_ALL_MCR htonl(0xE0000016L)
#define IGMP_LOCAL_GROUP htonl(0xE0000000L)
#define IGMP_LOCAL_GROUP_MASK htonl(0xFFFFFF00L)
/*
* struct for keeping the multicast list in
*/
#endif /* _LINUX_IGMP_H */