source: azure_iot_hub/trunk/musl-1.1.18/include/netinet/ip6.h@ 388

#ifndef _NETINET_IP6_H
#define _NETINET_IP6_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <netinet/in.h>
#include <endian.h>

struct ip6_hdr {
        union {
                struct ip6_hdrctl {
                        uint32_t ip6_un1_flow;
                        uint16_t ip6_un1_plen;
                        uint8_t  ip6_un1_nxt;
                        uint8_t  ip6_un1_hlim;
                } ip6_un1;
                uint8_t ip6_un2_vfc;
        } ip6_ctlun;
        struct in6_addr ip6_src;
        struct in6_addr ip6_dst;
};

#define ip6_vfc   ip6_ctlun.ip6_un2_vfc
#define ip6_flow  ip6_ctlun.ip6_un1.ip6_un1_flow
#define ip6_plen  ip6_ctlun.ip6_un1.ip6_un1_plen
#define ip6_nxt   ip6_ctlun.ip6_un1.ip6_un1_nxt
#define ip6_hlim  ip6_ctlun.ip6_un1.ip6_un1_hlim
#define ip6_hops  ip6_ctlun.ip6_un1.ip6_un1_hlim

struct ip6_ext {
        uint8_t  ip6e_nxt;
        uint8_t  ip6e_len;
};

struct ip6_hbh {
        uint8_t  ip6h_nxt;
        uint8_t  ip6h_len;
};

struct ip6_dest {
        uint8_t  ip6d_nxt;
        uint8_t  ip6d_len;
};

struct ip6_rthdr {
        uint8_t  ip6r_nxt;
        uint8_t  ip6r_len;
        uint8_t  ip6r_type;
        uint8_t  ip6r_segleft;
};

struct ip6_rthdr0 {
        uint8_t  ip6r0_nxt;
        uint8_t  ip6r0_len;
        uint8_t  ip6r0_type;
        uint8_t  ip6r0_segleft;
        uint8_t  ip6r0_reserved;
        uint8_t  ip6r0_slmap[3];
        struct in6_addr ip6r0_addr[];
};

struct ip6_frag {
        uint8_t   ip6f_nxt;
        uint8_t   ip6f_reserved;
        uint16_t  ip6f_offlg;
        uint32_t  ip6f_ident;
};

#if __BYTE_ORDER == __BIG_ENDIAN
#define IP6F_OFF_MASK       0xfff8
#define IP6F_RESERVED_MASK  0x0006
#define IP6F_MORE_FRAG      0x0001
#else
#define IP6F_OFF_MASK       0xf8ff
#define IP6F_RESERVED_MASK  0x0600
#define IP6F_MORE_FRAG      0x0100
#endif

struct ip6_opt {
        uint8_t  ip6o_type;
        uint8_t  ip6o_len;
};

#define IP6OPT_TYPE(o)          ((o) & 0xc0)
#define IP6OPT_TYPE_SKIP        0x00
#define IP6OPT_TYPE_DISCARD     0x40
#define IP6OPT_TYPE_FORCEICMP   0x80
#define IP6OPT_TYPE_ICMP        0xc0
#define IP6OPT_TYPE_MUTABLE     0x20

#define IP6OPT_PAD1     0
#define IP6OPT_PADN     1

#define IP6OPT_JUMBO            0xc2
#define IP6OPT_NSAP_ADDR        0xc3
#define IP6OPT_TUNNEL_LIMIT     0x04
#define IP6OPT_ROUTER_ALERT     0x05

struct ip6_opt_jumbo {
        uint8_t  ip6oj_type;
        uint8_t  ip6oj_len;
        uint8_t  ip6oj_jumbo_len[4];
};
#define IP6OPT_JUMBO_LEN        6

struct ip6_opt_nsap {
        uint8_t  ip6on_type;
        uint8_t  ip6on_len;
        uint8_t  ip6on_src_nsap_len;
        uint8_t  ip6on_dst_nsap_len;
};

struct ip6_opt_tunnel {
        uint8_t  ip6ot_type;
        uint8_t  ip6ot_len;
        uint8_t  ip6ot_encap_limit;
};

struct ip6_opt_router {
        uint8_t  ip6or_type;
        uint8_t  ip6or_len;
        uint8_t  ip6or_value[2];
};

#if __BYTE_ORDER == __BIG_ENDIAN
#define IP6_ALERT_MLD   0x0000
#define IP6_ALERT_RSVP  0x0001
#define IP6_ALERT_AN    0x0002
#else
#define IP6_ALERT_MLD   0x0000
#define IP6_ALERT_RSVP  0x0100
#define IP6_ALERT_AN    0x0200
#endif

#ifdef __cplusplus
}
#endif

#endif