[Bug libc/296] New: POSIX => AI_NUMERICHOST and address notation validity in getaddrinfo()

["a dot guru at sympatico dot ca" <sourceware-bugzilla at sources dot redhat dot com>]

This is for [glibc-2.3.3-200407231111],
files sysdeps/posix/getaddrinfo.c
  and resolv/netdb.h.

This refers to IEEE 1003.1, 2004 Edition, "Information technology --
Portable Operating System Interface (POSIX) --
Part 2: System Interfaces", getaddrinfo().

First:

] If the AI_NUMERICHOST flag is specified, then a non-null nodename
] string supplied shall be a numeric host address string. Otherwise,
] an [EAI_NONAME] error is returned. This flag shall prevent any
] type of name resolution service (for example, the DNS) from being
] invoked.

Then:

] If the specified address family is AF_INET or AF_UNSPEC, address
] strings using Internet standard dot notation as specified in
] inet_addr() are valid.

and

] If the specified address family is AF_INET6 or AF_UNSPEC,
] standard IPv6 text forms described in inet_ntop() are valid.

This means that both inet_addr() and inet_ntop() are valid if the
specified address family is AF_UNSPEC.

Not conforming to this can negatively impact backward
compatibility in applications that have been upgraded
from using inet_addr() to using getaddrinfo().

See <http://www.opengroup.org/onlinepubs/009695399/functions/getaddrinfo.html>
and <http://www.opengroup.org/onlinepubs/009695399/basedefs/netdb.h.html>.

A proposed patch follows.  I wrote it and I am putting it in the public
domain.

-- 
           Summary: POSIX => AI_NUMERICHOST and address notation validity in
                    getaddrinfo()
           Product: glibc
           Version: 2.3.3
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: libc
        AssignedTo: gotom at debian dot or dot jp
        ReportedBy: a dot guru at sympatico dot ca
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: n/a
  GCC host triplet: n/a
GCC target triplet: n/a


http://sources.redhat.com/bugzilla/show_bug.cgi?id=296

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