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6e7cb837 YH |
1 | #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 */ | |
8 | struct 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 */ | |
21 | struct 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 | ||
29 | struct 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 */ | |
41 | struct 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 | ||
89225d1c | 66 | /* Max Response Code, TODO: transform this to use the below */ |
6e7cb837 YH |
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 | ||
89225d1c DB |
75 | /* RFC3810, 5.1.3. Maximum Response Code: |
76 | * | |
77 | * If Maximum Response Code >= 32768, Maximum Response Code represents a | |
78 | * floating-point value as follows: | |
79 | * | |
80 | * 0 1 2 3 4 5 6 7 8 9 A B C D E F | |
81 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
82 | * |1| exp | mant | | |
83 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
84 | */ | |
85 | #define MLDV2_MRC_EXP(value) (((value) >> 12) & 0x0007) | |
86 | #define MLDV2_MRC_MAN(value) ((value) & 0x0fff) | |
87 | ||
88 | /* RFC3810, 5.1.9. QQIC (Querier's Query Interval Code): | |
89 | * | |
90 | * If QQIC >= 128, QQIC represents a floating-point value as follows: | |
91 | * | |
92 | * 0 1 2 3 4 5 6 7 | |
93 | * +-+-+-+-+-+-+-+-+ | |
94 | * |1| exp | mant | | |
95 | * +-+-+-+-+-+-+-+-+ | |
96 | */ | |
97 | #define MLDV2_QQIC_EXP(value) (((value) >> 4) & 0x07) | |
98 | #define MLDV2_QQIC_MAN(value) ((value) & 0x0f) | |
99 | ||
6e7cb837 | 100 | #endif |