blob: 467143cd4e2f35d9b75dbe1351ce4ec9098cdd82 [file] [log] [blame]
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001#ifndef LINUX_MLD_H
2#define LINUX_MLD_H
3
4#include <linux/in6.h>
5#include <linux/icmpv6.h>
6
7/* MLDv1 Query/Report/Done */
8struct mld_msg {
9 struct icmp6hdr mld_hdr;
10 struct in6_addr mld_mca;
11};
12
13#define mld_type mld_hdr.icmp6_type
14#define mld_code mld_hdr.icmp6_code
15#define mld_cksum mld_hdr.icmp6_cksum
16#define mld_maxdelay mld_hdr.icmp6_maxdelay
17#define mld_reserved mld_hdr.icmp6_dataun.un_data16[1]
18
19/* Multicast Listener Discovery version 2 headers */
20/* MLDv2 Report */
21struct mld2_grec {
22 __u8 grec_type;
23 __u8 grec_auxwords;
24 __be16 grec_nsrcs;
25 struct in6_addr grec_mca;
26 struct in6_addr grec_src[0];
27};
28
29struct mld2_report {
30 struct icmp6hdr mld2r_hdr;
31 struct mld2_grec mld2r_grec[0];
32};
33
34#define mld2r_type mld2r_hdr.icmp6_type
35#define mld2r_resv1 mld2r_hdr.icmp6_code
36#define mld2r_cksum mld2r_hdr.icmp6_cksum
37#define mld2r_resv2 mld2r_hdr.icmp6_dataun.un_data16[0]
38#define mld2r_ngrec mld2r_hdr.icmp6_dataun.un_data16[1]
39
40/* MLDv2 Query */
41struct mld2_query {
42 struct icmp6hdr mld2q_hdr;
43 struct in6_addr mld2q_mca;
44#if defined(__LITTLE_ENDIAN_BITFIELD)
45 __u8 mld2q_qrv:3,
46 mld2q_suppress:1,
47 mld2q_resv2:4;
48#elif defined(__BIG_ENDIAN_BITFIELD)
49 __u8 mld2q_resv2:4,
50 mld2q_suppress:1,
51 mld2q_qrv:3;
52#else
53#error "Please fix <asm/byteorder.h>"
54#endif
55 __u8 mld2q_qqic;
56 __be16 mld2q_nsrcs;
57 struct in6_addr mld2q_srcs[0];
58};
59
60#define mld2q_type mld2q_hdr.icmp6_type
61#define mld2q_code mld2q_hdr.icmp6_code
62#define mld2q_cksum mld2q_hdr.icmp6_cksum
63#define mld2q_mrc mld2q_hdr.icmp6_maxdelay
64#define mld2q_resv1 mld2q_hdr.icmp6_dataun.un_data16[1]
65
66/* Max Response Code */
67#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
68#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
69 ((value) < (thresh) ? (value) : \
70 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
71 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
72
73#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
74
75#endif