Quelle in6.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* Types and definitions for AF_INET6
* Linux INET6 implementation
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
* Sources:
* IPv6 Program Interfaces for BSD Systems
*      <draft-ietf-ipngwg-bsd-api-05.txt>
*
* Advanced Sockets API for IPv6
* <draft-stevens-advanced-api-00.txt>
*
* This program is free software; you can redistribute it and/or
*      modify it under the terms of the GNU General Public License
*      as published by the Free Software Foundation; either version
*      2 of the License, or (at your option) any later version.
*/

#ifndef _UAPI_LINUX_IN6_H
#define _UAPI_LINUX_IN6_H

#include <linux/types.h>
#include <linux/libc-compat.h>

/*
* IPv6 address structure
*/

#if __UAPI_DEF_IN6_ADDR
struct in6_addr {
union {
  __u8  u6_addr8[16];
#if __UAPI_DEF_IN6_ADDR_ALT
  __be16  u6_addr16[8];
  __be32  u6_addr32[4];
#endif
} in6_u;
#define s6_addr   in6_u.u6_addr8
#if __UAPI_DEF_IN6_ADDR_ALT
#define s6_addr16  in6_u.u6_addr16
#define s6_addr32  in6_u.u6_addr32
#endif
};
#endif /* __UAPI_DEF_IN6_ADDR */

#if __UAPI_DEF_SOCKADDR_IN6
struct sockaddr_in6 {
unsigned short int sin6_family;    /* AF_INET6 */
__be16   sin6_port;      /* Transport layer port # */
__be32   sin6_flowinfo;  /* IPv6 flow information */
struct in6_addr  sin6_addr;      /* IPv6 address */
__u32   sin6_scope_id;  /* scope id (new in RFC2553) */
};
#endif /* __UAPI_DEF_SOCKADDR_IN6 */

#if __UAPI_DEF_IPV6_MREQ
struct ipv6_mreq {
/* IPv6 multicast address of group */
struct in6_addr ipv6mr_multiaddr;

/* local IPv6 address of interface */
int  ipv6mr_ifindex;
};
#endif /* __UAPI_DEF_IVP6_MREQ */

#define ipv6mr_acaddr ipv6mr_multiaddr

struct in6_flowlabel_req {
struct in6_addr flr_dst;
__be32 flr_label;
__u8 flr_action;
__u8 flr_share;
__u16 flr_flags;
__u16  flr_expires;
__u16 flr_linger;
__u32 __flr_pad;
/* Options in format of IPV6_PKTOPTIONS */
};

#define IPV6_FL_A_GET 0
#define IPV6_FL_A_PUT 1
#define IPV6_FL_A_RENEW 2

#define IPV6_FL_F_CREATE 1
#define IPV6_FL_F_EXCL  2
#define IPV6_FL_F_REFLECT 4
#define IPV6_FL_F_REMOTE 8

#define IPV6_FL_S_NONE  0
#define IPV6_FL_S_EXCL  1
#define IPV6_FL_S_PROCESS 2
#define IPV6_FL_S_USER  3
#define IPV6_FL_S_ANY  255

/*
* Bitmask constant declarations to help applications select out the
* flow label and priority fields.
*
* Note that this are in host byte order while the flowinfo field of
* sockaddr_in6 is in network byte order.
*/

#define IPV6_FLOWINFO_FLOWLABEL  0x000fffff
#define IPV6_FLOWINFO_PRIORITY  0x0ff00000

/* These definitions are obsolete */
#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
#define IPV6_PRIORITY_FILLER  0x0100
#define IPV6_PRIORITY_UNATTENDED 0x0200
#define IPV6_PRIORITY_RESERVED1  0x0300
#define IPV6_PRIORITY_BULK  0x0400
#define IPV6_PRIORITY_RESERVED2  0x0500
#define IPV6_PRIORITY_INTERACTIVE 0x0600
#define IPV6_PRIORITY_CONTROL  0x0700
#define IPV6_PRIORITY_8   0x0800
#define IPV6_PRIORITY_9   0x0900
#define IPV6_PRIORITY_10  0x0a00
#define IPV6_PRIORITY_11  0x0b00
#define IPV6_PRIORITY_12  0x0c00
#define IPV6_PRIORITY_13  0x0d00
#define IPV6_PRIORITY_14  0x0e00
#define IPV6_PRIORITY_15  0x0f00

/*
* IPV6 extension headers
*/
#if __UAPI_DEF_IPPROTO_V6
#define IPPROTO_HOPOPTS  0 /* IPv6 hop-by-hop options */
#define IPPROTO_ROUTING  43 /* IPv6 routing header */
#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
#define IPPROTO_ICMPV6  58 /* ICMPv6 */
#define IPPROTO_NONE  59 /* IPv6 no next header */
#define IPPROTO_DSTOPTS  60 /* IPv6 destination options */
#define IPPROTO_MH  135 /* IPv6 mobility header */
#endif /* __UAPI_DEF_IPPROTO_V6 */

/*
* IPv6 TLV options.
*/
#define IPV6_TLV_PAD1  0
#define IPV6_TLV_PADN  1
#define IPV6_TLV_ROUTERALERT 5
#define IPV6_TLV_CALIPSO 7 /* RFC 5570 */
#define IPV6_TLV_IOAM  49 /* RFC 9486 */
#define IPV6_TLV_JUMBO  194
#define IPV6_TLV_HAO  201 /* home address option */

/*
* IPV6 socket options
*/
#define IPV6_ADDRFORM  1
#define IPV6_2292PKTINFO 2
#define IPV6_2292HOPOPTS 3
#define IPV6_2292DSTOPTS 4
#define IPV6_2292RTHDR  5
#define IPV6_2292PKTOPTIONS 6
#define IPV6_CHECKSUM  7
#define IPV6_2292HOPLIMIT 8
#define IPV6_NEXTHOP  9
#define IPV6_AUTHHDR  10 /* obsolete */
#define IPV6_FLOWINFO  11

#define IPV6_UNICAST_HOPS 16
#define IPV6_MULTICAST_IF 17
#define IPV6_MULTICAST_HOPS 18
#define IPV6_MULTICAST_LOOP 19
#if __UAPI_DEF_IPV6_OPTIONS
#define IPV6_ADD_MEMBERSHIP 20
#define IPV6_DROP_MEMBERSHIP 21
#endif
#define IPV6_ROUTER_ALERT 22
#define IPV6_MTU_DISCOVER 23
#define IPV6_MTU  24
#define IPV6_RECVERR  25
#define IPV6_V6ONLY  26
#define IPV6_JOIN_ANYCAST 27
#define IPV6_LEAVE_ANYCAST 28
#define IPV6_MULTICAST_ALL 29
#define IPV6_ROUTER_ALERT_ISOLATE 30
#define IPV6_RECVERR_RFC4884 31

/* IPV6_MTU_DISCOVER values */
#define IPV6_PMTUDISC_DONT  0
#define IPV6_PMTUDISC_WANT  1
#define IPV6_PMTUDISC_DO  2
#define IPV6_PMTUDISC_PROBE  3
/* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4
* also see comments on IP_PMTUDISC_INTERFACE
*/
#define IPV6_PMTUDISC_INTERFACE  4
/* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to
* get fragmented if they exceed the interface mtu
*/
#define IPV6_PMTUDISC_OMIT  5

/* Flowlabel */
#define IPV6_FLOWLABEL_MGR 32
#define IPV6_FLOWINFO_SEND 33

#define IPV6_IPSEC_POLICY 34
#define IPV6_XFRM_POLICY 35
#define IPV6_HDRINCL  36

/*
* Multicast:
* Following socket options are shared between IPv4 and IPv6.
*
* MCAST_JOIN_GROUP 42
* MCAST_BLOCK_SOURCE 43
* MCAST_UNBLOCK_SOURCE 44
* MCAST_LEAVE_GROUP 45
* MCAST_JOIN_SOURCE_GROUP 46
* MCAST_LEAVE_SOURCE_GROUP 47
* MCAST_MSFILTER 48
*/

/*
* Advanced API (RFC3542) (1)
*
* Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
*/

#define IPV6_RECVPKTINFO 49
#define IPV6_PKTINFO  50
#define IPV6_RECVHOPLIMIT 51
#define IPV6_HOPLIMIT  52
#define IPV6_RECVHOPOPTS 53
#define IPV6_HOPOPTS  54
#define IPV6_RTHDRDSTOPTS 55
#define IPV6_RECVRTHDR  56
#define IPV6_RTHDR  57
#define IPV6_RECVDSTOPTS 58
#define IPV6_DSTOPTS  59
#define IPV6_RECVPATHMTU 60
#define IPV6_PATHMTU  61
#define IPV6_DONTFRAG  62
#if 0 /* not yet */
#define IPV6_USE_MIN_MTU 63
#endif

/*
* Netfilter (1)
*
* Following socket options are used in ip6_tables;
* see include/linux/netfilter_ipv6/ip6_tables.h.
*
* IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
* IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
*/

/*
* Advanced API (RFC3542) (2)
*/
#define IPV6_RECVTCLASS  66
#define IPV6_TCLASS  67

/*
* Netfilter (2)
*
* Following socket options are used in ip6_tables;
* see include/linux/netfilter_ipv6/ip6_tables.h.
*
* IP6T_SO_GET_REVISION_MATCH 68
* IP6T_SO_GET_REVISION_TARGET 69
* IP6T_SO_ORIGINAL_DST 80
*/

#define IPV6_AUTOFLOWLABEL 70
/* RFC5014: Source address selection */
#define IPV6_ADDR_PREFERENCES 72

#define IPV6_PREFER_SRC_TMP  0x0001
#define IPV6_PREFER_SRC_PUBLIC  0x0002
#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
#define IPV6_PREFER_SRC_COA  0x0004
#define IPV6_PREFER_SRC_HOME  0x0400
#define IPV6_PREFER_SRC_CGA  0x0008
#define IPV6_PREFER_SRC_NONCGA  0x0800

/* RFC5082: Generalized Ttl Security Mechanism */
#define IPV6_MINHOPCOUNT  73

#define IPV6_ORIGDSTADDR        74
#define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
#define IPV6_TRANSPARENT        75
#define IPV6_UNICAST_IF         76
#define IPV6_RECVFRAGSIZE 77
#define IPV6_FREEBIND  78

/*
* Multicast Routing:
* see include/uapi/linux/mroute6.h.
*
* MRT6_BASE 200
* ...
* MRT6_MAX
*/
#endif /* _UAPI_LINUX_IN6_H */

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