5 #include <linux/icmpv6.h>
7 /* MLDv1 Query/Report/Done */
9 struct icmp6hdr mld_hdr
;
10 struct in6_addr mld_mca
;
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]
19 /* Multicast Listener Discovery version 2 headers */
25 struct in6_addr grec_mca
;
26 struct in6_addr grec_src
[0];
30 struct icmp6hdr mld2r_hdr
;
31 struct mld2_grec mld2r_grec
[0];
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]
42 struct icmp6hdr mld2q_hdr
;
43 struct in6_addr mld2q_mca
;
44 #if defined(__LITTLE_ENDIAN_BITFIELD)
48 #elif defined(__BIG_ENDIAN_BITFIELD)
53 #error "Please fix <asm/byteorder.h>"
57 struct in6_addr mld2q_srcs
[0];
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]
66 /* RFC3810, 5.1.3. Maximum Response Code:
68 * If Maximum Response Code >= 32768, Maximum Response Code represents a
69 * floating-point value as follows:
71 * 0 1 2 3 4 5 6 7 8 9 A B C D E F
72 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
74 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
76 #define MLDV2_MRC_EXP(value) (((value) >> 12) & 0x0007)
77 #define MLDV2_MRC_MAN(value) ((value) & 0x0fff)
79 /* RFC3810, 5.1.9. QQIC (Querier's Query Interval Code):
81 * If QQIC >= 128, QQIC represents a floating-point value as follows:
88 #define MLDV2_QQIC_EXP(value) (((value) >> 4) & 0x07)
89 #define MLDV2_QQIC_MAN(value) ((value) & 0x0f)
91 static inline unsigned long mldv2_mrc(const struct mld2_query
*mlh2
)
93 /* RFC3810, 5.1.3. Maximum Response Code */
94 unsigned long ret
, mc_mrc
= ntohs(mlh2
->mld2q_mrc
);
99 unsigned long mc_man
, mc_exp
;
101 mc_exp
= MLDV2_MRC_EXP(mc_mrc
);
102 mc_man
= MLDV2_MRC_MAN(mc_mrc
);
104 ret
= (mc_man
| 0x1000) << (mc_exp
+ 3);
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