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#ifndef SOCKET_UTILS_H
#define SOCKET_UTILS_H
/* Some useful stuff cross-platform. */
/* for HAVE_SOCKLEN_T, KRB5_USE_INET6, HAVE_SA_LEN */
#include "krb5/autoconf.h"
/* Either size_t or int or unsigned int is probably right. Under
SunOS 4, it looks like int is desired, according to the accept man
page. */
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
/* XXX should only be done if sockaddr_storage not found */
#ifndef KRB5_USE_INET6
struct krb5int_sockaddr_storage { struct sockaddr_in s; };
#define sockaddr_storage krb5int_sockaddr_storage
#endif
#if defined (__GNUC__)
/* 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 *". */
static __inline__ struct sockaddr_in *sa2sin (struct sockaddr *sa)
{
return (struct sockaddr_in *) sa;
}
#ifdef KRB5_USE_INET6xxNotUsed
static __inline__ struct sockaddr_in6 *sa2sin6 (struct sockaddr *sa)
{
return (struct sockaddr_in6 *) 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;
}
static __inline__ struct sockaddr_in6 *ss2sin6 (struct sockaddr_storage *ss)
{
return (struct sockaddr_in6 *) ss;
}
#else
#define sa2sin(S) ((struct sockaddr_in *)(S))
#define sa2sin6(S) ((struct sockaddr_in6 *)(S))
#define ss2sa(S) ((struct sockaddr *)(S))
#define ss2sin(S) ((struct sockaddr_in *)(S))
#define ss2sin6(S) ((struct sockaddr_in6 *)(S))
#endif
#if !defined (socklen)
/* size_t socklen (struct sockaddr *) */
/* Should this return socklen_t instead? */
# ifdef HAVE_SA_LEN
# define socklen(X) ((X)->sa_len)
# else
# ifdef KRB5_USE_INET6
# define socklen(X) ((X)->sa_family == AF_INET6 ? sizeof (struct sockaddr_in6) : (X)->sa_family == AF_INET ? sizeof (struct sockaddr_in) : sizeof (struct sockaddr))
# else
# define socklen(X) ((X)->sa_family == AF_INET ? sizeof (struct sockaddr_in) : sizeof (struct sockaddr))
# endif
# endif
#endif
#endif /* SOCKET_UTILS_H */
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