| YOSHIFUJI Hideaki | 6e7cb83 | 2010-04-18 12:42:05 +0900 | [diff] [blame^] | 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 | |
| 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 |