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linux-pinenote/include/uapi/linux/in6.h
Carlos O'Donell cfd280c912 net: sync some IP headers with glibc 
Solution:
=========

- Synchronize linux's `include/uapi/linux/in6.h'
  with glibc's `inet/netinet/in.h'.
- Synchronize glibc's `inet/netinet/in.h with linux's
  `include/uapi/linux/in6.h'.
- Allow including the headers in either other.
- First header included defines the structures and macros.

Details:
========

The kernel promises not to break the UAPI ABI so I don't
see why we can't just have the two userspace headers
coordinate?

If you include the kernel headers first you get those,
and if you include the glibc headers first you get those,
and the following patch arranges a coordination and
synchronization between the two.

Let's handle `include/uapi/linux/in6.h' from linux,
and `inet/netinet/in.h' from glibc and ensure they compile
in any order and preserve the required ABI.

These two patches pass the following compile tests:

cat >> test1.c <<EOF
int main (void) {
  return 0;
}
EOF
gcc -c test1.c

cat >> test2.c <<EOF
int main (void) {
  return 0;
}
EOF
gcc -c test2.c

One wrinkle is that the kernel has a different name for one of
the members in ipv6_mreq. In the kernel patch we create a macro
to cover the uses of the old name, and while that's not entirely
clean it's one of the best solutions (aside from an anonymous
union which has other issues).

I've reviewed the code and it looks to me like the ABI is
assured and everything matches on both sides.

Notes:
- You want netinet/in.h to include bits/in.h as early as possible,
  but it needs in_addr so define in_addr early.
- You want bits/in.h included as early as possible so you can use
  the linux specific code to define __USE_KERNEL_DEFS based on
  the _UAPI_* macro definition and use those to cull in.h.
- glibc was missing IPPROTO_MH, added here.

Compile tested and inspected.

Reported-by: Thomas Backlund <tmb@mageia.org>
Cc: Thomas Backlund <tmb@mageia.org>
Cc: libc-alpha@sourceware.org
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Cc: David S. Miller <davem@davemloft.net>
Tested-by: Cong Wang <amwang@redhat.com>
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-04 13:12:43 -04:00

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/*
* 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_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
enum {
IPPROTO_HOPOPTS = 0, /* IPv6 hop-by-hop options */
#define IPPROTO_HOPOPTS IPPROTO_HOPOPTS
IPPROTO_ROUTING = 43, /* IPv6 routing header */
#define IPPROTO_ROUTING IPPROTO_ROUTING
IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header */
#define IPPROTO_FRAGMENT IPPROTO_FRAGMENT
IPPROTO_ICMPV6 = 58, /* ICMPv6 */
#define IPPROTO_ICMPV6 IPPROTO_ICMPV6
IPPROTO_NONE = 59, /* IPv6 no next header */
#define IPPROTO_NONE IPPROTO_NONE
IPPROTO_DSTOPTS = 60, /* IPv6 destination options */
#define IPPROTO_DSTOPTS IPPROTO_DSTOPTS
IPPROTO_MH = 135, /* IPv6 mobility header */
#define IPPROTO_MH IPPROTO_MH
};
#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_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
#define IPV6_ADD_MEMBERSHIP 20
#define IPV6_DROP_MEMBERSHIP 21
#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
/* IPV6_MTU_DISCOVER values */
#define IPV6_PMTUDISC_DONT 0
#define IPV6_PMTUDISC_WANT 1
#define IPV6_PMTUDISC_DO 2
#define IPV6_PMTUDISC_PROBE 3
/* Flowlabel */
#define IPV6_FLOWLABEL_MGR 32
#define IPV6_FLOWINFO_SEND 33
#define IPV6_IPSEC_POLICY 34
#define IPV6_XFRM_POLICY 35
/*
* 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
*/
/* 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
/*
* Multicast Routing:
* see include/uapi/linux/mroute6.h.
*
* MRT6_BASE 200
* ...
* MRT6_MAX
*/
#endif /* _UAPI_LINUX_IN6_H */
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