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Diffstat (limited to 'REORG.TODO/inet/netinet/ip6.h')
| -rw-r--r-- | REORG.TODO/inet/netinet/ip6.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/REORG.TODO/inet/netinet/ip6.h b/REORG.TODO/inet/netinet/ip6.h new file mode 100644 index 0000000000..dbced70502 --- /dev/null +++ b/REORG.TODO/inet/netinet/ip6.h @@ -0,0 +1,188 @@ +/* Copyright (C) 1991-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _NETINET_IP6_H +#define _NETINET_IP6_H 1 + +#include <inttypes.h> +#include <netinet/in.h> + +struct ip6_hdr + { + union + { + struct ip6_hdrctl + { + uint32_t ip6_un1_flow; /* 4 bits version, 8 bits TC, + 20 bits flow-ID */ + uint16_t ip6_un1_plen; /* payload length */ + uint8_t ip6_un1_nxt; /* next header */ + uint8_t ip6_un1_hlim; /* hop limit */ + } ip6_un1; + uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits tclass */ + } ip6_ctlun; + struct in6_addr ip6_src; /* source address */ + struct in6_addr ip6_dst; /* destination address */ + }; + +#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 + +/* Generic extension header. */ +struct ip6_ext + { + uint8_t ip6e_nxt; /* next header. */ + uint8_t ip6e_len; /* length in units of 8 octets. */ + }; + +/* Hop-by-Hop options header. */ +struct ip6_hbh + { + uint8_t ip6h_nxt; /* next header. */ + uint8_t ip6h_len; /* length in units of 8 octets. */ + /* followed by options */ + }; + +/* Destination options header */ +struct ip6_dest + { + uint8_t ip6d_nxt; /* next header */ + uint8_t ip6d_len; /* length in units of 8 octets */ + /* followed by options */ + }; + +/* Routing header */ +struct ip6_rthdr + { + uint8_t ip6r_nxt; /* next header */ + uint8_t ip6r_len; /* length in units of 8 octets */ + uint8_t ip6r_type; /* routing type */ + uint8_t ip6r_segleft; /* segments left */ + /* followed by routing type specific data */ + }; + +/* Type 0 Routing header */ +struct ip6_rthdr0 + { + uint8_t ip6r0_nxt; /* next header */ + uint8_t ip6r0_len; /* length in units of 8 octets */ + uint8_t ip6r0_type; /* always zero */ + uint8_t ip6r0_segleft; /* segments left */ + uint8_t ip6r0_reserved; /* reserved field */ + uint8_t ip6r0_slmap[3]; /* strict/loose bit map */ + /* followed by up to 127 struct in6_addr */ + struct in6_addr ip6r0_addr[0]; + }; + +/* Fragment header */ +struct ip6_frag + { + uint8_t ip6f_nxt; /* next header */ + uint8_t ip6f_reserved; /* reserved field */ + uint16_t ip6f_offlg; /* offset, reserved, and flag */ + uint32_t ip6f_ident; /* identification */ + }; + +#if __BYTE_ORDER == __BIG_ENDIAN +# define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */ +# define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ +# define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ +#else /* __BYTE_ORDER == __LITTLE_ENDIAN */ +# define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */ +# define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */ +# define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */ +#endif + +/* IPv6 options */ +struct ip6_opt + { + uint8_t ip6o_type; + uint8_t ip6o_len; + }; + +/* The high-order 3 bits of the option type define the behavior + * when processing an unknown option and whether or not the option + * content changes in flight. + */ +#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 + +/* Special option types for padding. */ +#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 + +/* Jumbo Payload Option */ +struct ip6_opt_jumbo + { + uint8_t ip6oj_type; + uint8_t ip6oj_len; + uint8_t ip6oj_jumbo_len[4]; + }; +#define IP6OPT_JUMBO_LEN 6 + +/* NSAP Address Option */ +struct ip6_opt_nsap + { + uint8_t ip6on_type; + uint8_t ip6on_len; + uint8_t ip6on_src_nsap_len; + uint8_t ip6on_dst_nsap_len; + /* followed by source NSAP */ + /* followed by destination NSAP */ + }; + +/* Tunnel Limit Option */ +struct ip6_opt_tunnel + { + uint8_t ip6ot_type; + uint8_t ip6ot_len; + uint8_t ip6ot_encap_limit; + }; + +/* Router Alert Option */ +struct ip6_opt_router + { + uint8_t ip6or_type; + uint8_t ip6or_len; + uint8_t ip6or_value[2]; + }; + +/* Router alert values (in network byte order) */ +#if __BYTE_ORDER == __BIG_ENDIAN +# define IP6_ALERT_MLD 0x0000 +# define IP6_ALERT_RSVP 0x0001 +# define IP6_ALERT_AN 0x0002 +#else /* __BYTE_ORDER == __LITTLE_ENDIAN */ +# define IP6_ALERT_MLD 0x0000 +# define IP6_ALERT_RSVP 0x0100 +# define IP6_ALERT_AN 0x0200 +#endif + +#endif /* netinet/ip6.h */ |