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/* $Id: socket.h 5388 2002-04-01 07:03:01Z rra $
**
** Portability wrapper around <sys/socket.h> and friends.
**
** This header file is the equivalent of:
**
** #include <arpa/inet.h>
** #include <netinet/in.h>
** #include <sys/socket.h>
**
** but also cleans up various messes, mostly related to IPv6 support. It
** ensures that inet_aton and inet_ntoa are available and properly
** prototyped.
*/
#ifndef PORTABLE_SOCKET_H
#define PORTABLE_SOCKET_H 1
#include "config.h"
#include <sys/types.h>
/* BSDI needs <netinet/in.h> before <arpa/inet.h>. */
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
/* Provide prototypes for inet_aton and inet_ntoa if not prototyped in the
system header files since they're occasionally available without proper
prototypes. */
#if NEED_DECLARATION_INET_ATON
extern int inet_aton(const char *, struct in_addr *);
#endif
#if NEED_DECLARATION_INET_NTOA
extern const char * inet_ntoa(const struct in_addr);
#endif
/* Defined by RFC 2553, used to store a generic address. Note that this
doesn't do the alignment mangling that RFC 2553 does; it's not clear if
that should be added.... */
#if !HAVE_SOCKADDR_STORAGE
# if HAVE_SOCKADDR_LEN
struct sockaddr_storage {
unsigned char ss_len;
unsigned char ss_family;
unsigned char __padding[128 - 2];
};
# else
struct sockaddr_storage {
unsigned short ss_family;
unsigned char __padding[128 - 2];
};
# endif
#endif
/* Use convenient, non-uglified names for the fields since we use them quite a
bit in code. */
#if HAVE_2553_STYLE_SS_FAMILY
# define ss_family __ss_family
# define ss_len __ss_len
#endif
/* Define an SA_LEN macro that gives us the length of a sockaddr. */
#if !HAVE_SA_LEN_MACRO
# if HAVE_SOCKADDR_LEN
# define SA_LEN(s) ((s)->sa_len)
# else
/* Hack courtesy of the USAGI project. */
# if HAVE_INET6
# define SA_LEN(s) \
((((struct sockaddr *)(s))->sa_family == AF_INET6) \
? sizeof(struct sockaddr_in6) \
: ((((struct sockaddr *)(s))->sa_family == AF_INET) \
? sizeof(struct sockaddr_in) \
: sizeof(struct sockaddr)))
# else
# define SA_LEN(s) \
((((struct sockaddr *)(s))->sa_family == AF_INET) \
? sizeof(struct sockaddr_in) \
: sizeof(struct sockaddr))
# endif
# endif /* HAVE_SOCKADDR_LEN */
#endif /* !HAVE_SA_LEN_MACRO */
#endif /* PORTABLE_SOCKET_H */
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