| /* |
| * 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; |
| __be16 csum; |
| __be16 resv2; |
| __be16 ngrec; |
| struct igmpv3_grec grec[0]; |
| }; |
| |
| struct igmpv3_query { |
| __u8 type; |
| __u8 code; |
| __be16 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 |
