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Coordinate IPv6 definitions for Linux and glibc
This change synchronizes the glibc headers with the Linux kernel headers and arranges to coordinate the definition of structures already defined the Linux kernel UAPI headers. It is now safe to include glibc's netinet/in.h or Linux's linux/in6.h in any order in a userspace application and you will get the same ABI. The ABI is guaranteed by UAPI and glibc.
This commit is contained in:
Carlos O'Donell
parent
5430fc65a1
commit
6c82a2f8d7
12
ChangeLog
12
ChangeLog
@ -1,3 +1,15 @@
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2013-09-05 Carlos O'Donell <carlos@redhat.com>
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Cong Wang <amwang@redhat.com>
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* sysdeps/unix/sysv/linux/bits/in.h
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[_UAPI_LINUX_IN6_H]: Define __USE_KERNEL_IPV6_DEFS.
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* inet/netinet/in.h: Move in_addr definition and bits/in.h inclusion
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before __USE_KERNEL_IPV6_DEFS uses.
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* inet/netinet/in.h [!__USE_KERNEL_IPV6_DEFS]: Define IPPROTO_MH, and
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IPPROTO_BEETPH.
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[__USE_KERNEL_IPV6_DEFS]: Don't define any of IPPROTO_*, in6_addr,
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sockaddr_in6, or ipv6_mreq.
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2013-09-05 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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* sysdeps/powerpc/powerpc32/power7/memrchr.S (__memrchr): Fix invalid
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@ -26,13 +26,21 @@
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__BEGIN_DECLS
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/* Internet address. */
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typedef uint32_t in_addr_t;
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struct in_addr
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{
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in_addr_t s_addr;
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};
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/* Get system-specific definitions. */
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#include <bits/in.h>
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/* Standard well-defined IP protocols. */
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enum
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{
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IPPROTO_IP = 0, /* Dummy protocol for TCP. */
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#define IPPROTO_IP IPPROTO_IP
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IPPROTO_HOPOPTS = 0, /* IPv6 Hop-by-Hop options. */
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#define IPPROTO_HOPOPTS IPPROTO_HOPOPTS
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IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */
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#define IPPROTO_ICMP IPPROTO_ICMP
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IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */
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@ -55,10 +63,6 @@ enum
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#define IPPROTO_DCCP IPPROTO_DCCP
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IPPROTO_IPV6 = 41, /* IPv6 header. */
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#define IPPROTO_IPV6 IPPROTO_IPV6
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IPPROTO_ROUTING = 43, /* IPv6 routing header. */
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#define IPPROTO_ROUTING IPPROTO_ROUTING
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IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header. */
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#define IPPROTO_FRAGMENT IPPROTO_FRAGMENT
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IPPROTO_RSVP = 46, /* Reservation Protocol. */
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#define IPPROTO_RSVP IPPROTO_RSVP
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IPPROTO_GRE = 47, /* General Routing Encapsulation. */
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@ -67,14 +71,10 @@ enum
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#define IPPROTO_ESP IPPROTO_ESP
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IPPROTO_AH = 51, /* authentication header. */
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#define IPPROTO_AH IPPROTO_AH
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IPPROTO_ICMPV6 = 58, /* ICMPv6. */
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#define IPPROTO_ICMPV6 IPPROTO_ICMPV6
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IPPROTO_NONE = 59, /* IPv6 no next header. */
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#define IPPROTO_NONE IPPROTO_NONE
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IPPROTO_DSTOPTS = 60, /* IPv6 destination options. */
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#define IPPROTO_DSTOPTS IPPROTO_DSTOPTS
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IPPROTO_MTP = 92, /* Multicast Transport Protocol. */
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#define IPPROTO_MTP IPPROTO_MTP
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IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET. */
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#define IPPROTO_BEETPH IPPROTO_BEETPH
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IPPROTO_ENCAP = 98, /* Encapsulation Header. */
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#define IPPROTO_ENCAP IPPROTO_ENCAP
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IPPROTO_PIM = 103, /* Protocol Independent Multicast. */
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@ -90,6 +90,28 @@ enum
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IPPROTO_MAX
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};
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/* If __USER_KERNEL_IPV6_DEFS is defined then the user has included the kernel
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network headers first and we should use those ABI-identical definitions
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instead of our own. */
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#ifndef __USE_KERNEL_IPV6_DEFS
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enum
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{
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IPPROTO_HOPOPTS = 0, /* IPv6 Hop-by-Hop options. */
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#define IPPROTO_HOPOPTS IPPROTO_HOPOPTS
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IPPROTO_ROUTING = 43, /* IPv6 routing header. */
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#define IPPROTO_ROUTING IPPROTO_ROUTING
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IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header. */
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#define IPPROTO_FRAGMENT IPPROTO_FRAGMENT
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IPPROTO_ICMPV6 = 58, /* ICMPv6. */
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#define IPPROTO_ICMPV6 IPPROTO_ICMPV6
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IPPROTO_NONE = 59, /* IPv6 no next header. */
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#define IPPROTO_NONE IPPROTO_NONE
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IPPROTO_DSTOPTS = 60, /* IPv6 destination options. */
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#define IPPROTO_DSTOPTS IPPROTO_DSTOPTS
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IPPROTO_MH = 135, /* IPv6 mobility header. */
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#define IPPROTO_MH IPPROTO_MH
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};
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#endif /* !__USE_KERNEL_IPV6_DEFS */
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/* Type to represent a port. */
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typedef uint16_t in_port_t;
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@ -134,15 +156,6 @@ enum
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IPPORT_USERRESERVED = 5000
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};
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/* Internet address. */
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typedef uint32_t in_addr_t;
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struct in_addr
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{
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in_addr_t s_addr;
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};
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/* Definitions of the bits in an Internet address integer.
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On subnets, host and network parts are found according to
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@ -191,7 +204,7 @@ struct in_addr
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#define INADDR_ALLRTRS_GROUP ((in_addr_t) 0xe0000002) /* 224.0.0.2 */
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#define INADDR_MAX_LOCAL_GROUP ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */
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#ifndef __USE_KERNEL_IPV6_DEFS
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/* IPv6 address */
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struct in6_addr
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{
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@ -209,6 +222,7 @@ struct in6_addr
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# define s6_addr32 __in6_u.__u6_addr32
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#endif
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};
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#endif /* !__USE_KERNEL_IPV6_DEFS */
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extern const struct in6_addr in6addr_any; /* :: */
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extern const struct in6_addr in6addr_loopback; /* ::1 */
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@ -233,6 +247,7 @@ struct sockaddr_in
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sizeof (struct in_addr)];
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};
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#ifndef __USE_KERNEL_IPV6_DEFS
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/* Ditto, for IPv6. */
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struct sockaddr_in6
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{
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@ -242,7 +257,7 @@ struct sockaddr_in6
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struct in6_addr sin6_addr; /* IPv6 address */
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uint32_t sin6_scope_id; /* IPv6 scope-id */
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};
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#endif /* !__USE_KERNEL_IPV6_DEFS */
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#if defined __USE_MISC || defined __USE_GNU
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/* IPv4 multicast request. */
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@ -268,7 +283,7 @@ struct ip_mreq_source
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};
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#endif
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#ifndef __USE_KERNEL_IPV6_DEFS
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/* Likewise, for IPv6. */
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struct ipv6_mreq
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{
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@ -278,7 +293,7 @@ struct ipv6_mreq
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/* local interface */
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unsigned int ipv6mr_interface;
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};
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#endif /* !__USE_KERNEL_IPV6_DEFS */
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#if defined __USE_MISC || defined __USE_GNU
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/* Multicast group request. */
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@ -349,10 +364,6 @@ struct group_filter
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* sizeof (struct sockaddr_storage)))
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#endif
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/* Get system-specific definitions. */
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#include <bits/in.h>
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/* Functions to convert between host and network byte order.
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Please note that these functions normally take `unsigned long int' or
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@ -21,6 +21,18 @@
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# error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
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#endif
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/* If the application has already included linux/in6.h from a linux-based
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kernel then we will not define the IPv6 IPPROTO_* defines, in6_addr (nor the
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defines), sockaddr_in6, or ipv6_mreq. The ABI used by the linux-kernel and
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glibc match exactly. Neither the linux kernel nor glibc should break this
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ABI without coordination. */
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#ifdef _UAPI_LINUX_IN6_H
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/* This is not quite the same API since the kernel always defines s6_addr16 and
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s6_addr32. This is not a violation of POSIX since POSIX says "at least the
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following member" and that holds true. */
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# define __USE_KERNEL_IPV6_DEFS
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#endif
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/* Options for use with `getsockopt' and `setsockopt' at the IP level.
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The first word in the comment at the right is the data type used;
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"bool" means a boolean value stored in an `int'. */
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