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 */ 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 76