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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright (C) 2001,2005 by the Massachusetts Institute of Technology,
* Cambridge, MA, USA. All Rights Reserved.
*
* This software is being provided to you, the LICENSEE, by the
* Massachusetts Institute of Technology (M.I.T.) under the following
* license. By obtaining, using and/or copying this software, you agree
* that you have read, understood, and will comply with these terms and
* conditions:
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify and distribute
* this software and its documentation for any purpose and without fee or
* royalty is hereby granted, provided that you agree to comply with the
* following copyright notice and statements, including the disclaimer, and
* that the same appear on ALL copies of the software and documentation,
* including modifications that you make for internal use or for
* distribution:
*
* THIS SOFTWARE IS PROVIDED "AS IS", AND M.I.T. MAKES NO REPRESENTATIONS
* OR WARRANTIES, EXPRESS OR IMPLIED. By way of example, but not
* limitation, M.I.T. MAKES NO REPRESENTATIONS OR WARRANTIES OF
* MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF
* THE LICENSED SOFTWARE OR DOCUMENTATION WILL NOT INFRINGE ANY THIRD PARTY
* PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
*
* The name of the Massachusetts Institute of Technology or M.I.T. may NOT
* be used in advertising or publicity pertaining to distribution of the
* software. Title to copyright in this software and any associated
* documentation shall at all times remain with M.I.T., and USER agrees to
* preserve same.
*
* Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
*/
#ifndef SOCKET_UTILS_H
#define SOCKET_UTILS_H
/* Some useful stuff cross-platform for manipulating socket addresses.
We assume at least ipv4 sockaddr_in support. The sockaddr_storage
stuff comes from the ipv6 socket api enhancements; socklen_t is
provided on some systems; the rest is just convenience for internal
use in the krb5 tree.
Do NOT install this file. */
/* for HAVE_SOCKLEN_T, KRB5_USE_INET6, etc */
#include "autoconf.h"
/* for sockaddr_storage */
#include "port-sockets.h"
/* for "inline" if needed */
#include "k5-platform.h"
/*
* There's a lot of confusion between pointers to different sockaddr
* types, and pointers with different degrees of indirection, as in
* the locate_kdc type functions. Use these function to ensure we
* don't do something silly like cast a "sockaddr **" to a
* "sockaddr_in *".
*
* The casts to (void *) are to get GCC to shut up about alignment
* increasing.
*/
static inline struct sockaddr_in *sa2sin (struct sockaddr *sa)
{
return (struct sockaddr_in *) (void *) sa;
}
#ifdef KRB5_USE_INET6
static inline struct sockaddr_in6 *sa2sin6 (struct sockaddr *sa)
{
return (struct sockaddr_in6 *) (void *) sa;
}
#endif
static inline struct sockaddr *ss2sa (struct sockaddr_storage *ss)
{
return (struct sockaddr *) ss;
}
static inline struct sockaddr_in *ss2sin (struct sockaddr_storage *ss)
{
return (struct sockaddr_in *) ss;
}
#ifdef KRB5_USE_INET6
static inline struct sockaddr_in6 *ss2sin6 (struct sockaddr_storage *ss)
{
return (struct sockaddr_in6 *) ss;
}
#endif
#if !defined (socklen)
/* socklen_t socklen (struct sockaddr *) */
# ifdef HAVE_SA_LEN
# define socklen(X) ((X)->sa_len)
# else
# ifdef KRB5_USE_INET6
# define socklen(X) ((X)->sa_family == AF_INET6 ? (socklen_t) sizeof (struct sockaddr_in6) : (X)->sa_family == AF_INET ? (socklen_t) sizeof (struct sockaddr_in) : (socklen_t) sizeof (struct sockaddr))
# else
# define socklen(X) ((X)->sa_family == AF_INET ? (socklen_t) sizeof (struct sockaddr_in) : (socklen_t) sizeof (struct sockaddr))
# endif
# endif
#endif
#endif /* SOCKET_UTILS_H */
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