/*
sys/socket.h
*/

#ifndef SYS_SOCKET_H
#define SYS_SOCKET_H

/* Can we include <stdint.h> here or do we need an additional header that is
 * safe to include?
 */
#include <stdint.h>

#include <sys/ucred.h>

/* Open Group Base Specifications Issue 6 (not complete) */
#include <net/gen/socket.h>

#define SOCK_STREAM	1
#define SOCK_DGRAM	2
#define SOCK_RAW	3
#define SOCK_RDM	4
#define SOCK_SEQPACKET	5

#define SOL_SOCKET	0xFFFF

#define SO_DEBUG	0x0001
#define SO_REUSEADDR	0x0004
#define SO_KEEPALIVE	0x0008
#define SO_TYPE	0x0010	/* get socket type, SOCK_STREAM or SOCK_DGRAM */

#define SO_PASSCRED	0x0012
#define SO_PEERCRED	0x0014

#define SO_SNDBUF	0x1001	/* send buffer size */
#define SO_RCVBUF	0x1002	/* receive buffer size */
#define SO_ERROR	0x1007	/* get and clear error status */

/* The how argument to shutdown */
#define SHUT_RD		0	/* No further reads */
#define SHUT_WR		1	/* No further writes */
#define SHUT_RDWR	2	/* No further reads and writes */

#ifndef _SA_FAMILY_T
#define _SA_FAMILY_T
typedef uint8_t		sa_family_t;
#endif /* _SA_FAMILY_T */

#ifndef _SOCKLEN_T
#define _SOCKLEN_T
typedef int32_t socklen_t;
#endif /* _SOCKLEN_T */

struct sockaddr
{
	sa_family_t	sa_family;
	char		sa_data[8];	/* Big enough for sockaddr_in */
};

struct msghdr
{
	void		*msg_name;
	socklen_t	msg_namelen;
	struct iovec	*msg_iov;
	size_t		msg_iovlen;
	void		*msg_control;
	socklen_t	msg_controllen;
	int		msg_flags;
};

struct cmsghdr
{
	socklen_t	cmsg_len;
	int		cmsg_level;
	int		cmsg_type;
};

#define CMSG_FIRSTHDR(mhdr) 					\
	( (mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? 	\
		(struct cmsghdr *)(mhdr)->msg_control : 	\
		(struct cmsghdr *)NULL )

#define CMSG_ALIGN(len)						\
	( (len % sizeof(long) == 0) ?				\
		len :						\
		len + sizeof(long) - (len  % sizeof(long)) )

#define CMSG_NXTHDR(mhdr, cmsg) 					\
	( ((cmsg) == NULL) ? CMSG_FIRSTHDR(mhdr) : 			\
		(((unsigned char *)(cmsg) + CMSG_ALIGN((cmsg)->cmsg_len) \
		+ CMSG_ALIGN(sizeof(struct cmsghdr)) >			\
		(unsigned char *)((mhdr)->msg_control) +		\
		(mhdr)->msg_controllen) ? 				\
		(struct cmsghdr *)NULL : 				\
		(struct cmsghdr *)((unsigned char *)(cmsg) + 		\
		CMSG_ALIGN((cmsg)->cmsg_len))) )

#define CMSG_DATA(cmsg) \
	( (unsigned char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr)) )

#define CMSG_SPACE(len) \
	( CMSG_ALIGN(len) + CMSG_ALIGN(sizeof(struct cmsghdr)) )

#define CMSG_LEN(len) \
	( len + CMSG_ALIGN(sizeof(struct cmsghdr)) )

#define SCM_RIGHTS	0x01
#define SCM_CREDENTIALS	0x02
#define SCM_SECURITY	0x04

_PROTOTYPE( int accept, (int _socket,
				struct sockaddr *_RESTRICT _address,
				socklen_t *_RESTRICT _address_len)	);
_PROTOTYPE( int bind, (int _socket, const struct sockaddr *_address,
						socklen_t _address_len)	);
_PROTOTYPE( int connect, (int _socket, const struct sockaddr *_address,
						socklen_t _address_len)	);
_PROTOTYPE( int getpeername, (int _socket,
				struct sockaddr *_RESTRICT _address,
				socklen_t *_RESTRICT _address_len)	);
_PROTOTYPE( int getpeereid, (int _socket, uid_t *_euid, gid_t *_egid)	);
_PROTOTYPE( int getsockname, (int _socket,
				struct sockaddr *_RESTRICT _address,
				socklen_t *_RESTRICT _address_len)	);
_PROTOTYPE( int setsockopt,(int _socket, int _level, int _option_name,
		const void *_option_value, socklen_t _option_len)	);
_PROTOTYPE( int getsockopt, (int _socket, int _level, int _option_name,
        void *_RESTRICT _option_value, socklen_t *_RESTRICT _option_len));
_PROTOTYPE( int listen, (int _socket, int _backlog)			);
_PROTOTYPE( ssize_t recv, (int _socket, void *_buffer, size_t _length,
							int _flags)	);
_PROTOTYPE( ssize_t recvfrom, (int _socket, void *_RESTRICT _buffer,
	size_t _length, int _flags, struct sockaddr *_RESTRICT _address,
				socklen_t *_RESTRICT _address_len)	);
_PROTOTYPE( ssize_t recvmsg, (int _socket, struct msghdr *_msg,
							int _flags)	);
_PROTOTYPE( ssize_t send, (int _socket, const void *_buffer,
					size_t _length, int _flags)	);
_PROTOTYPE( ssize_t sendmsg, (int _socket, const struct msghdr *_msg,
							int _flags)	);
_PROTOTYPE( ssize_t sendto, (int _socket, const void *_message,
	size_t _length, int _flags, const struct sockaddr *_dest_addr,
						socklen_t _dest_len)	);
_PROTOTYPE( int shutdown, (int _socket, int _how)			);
_PROTOTYPE( int socket, (int _domain, int _type, int _protocol)		);
_PROTOTYPE( int socketpair, (int _domain, int _type, int _protocol,
							int _sv[2])	);

/* The following constants are often used in applications, but are not defined
 * by POSIX.
 */
#define PF_INET		AF_INET
#define PF_INET6	AF_INET6
#define PF_UNIX		AF_UNIX
#define PF_LOCAL	PF_UNIX
#define PF_FILE		PF_UNIX
#define PF_UNSPEC	AF_UNSPEC

/* based on http://tools.ietf.org/html/rfc2553 */
struct sockaddr_storage
{
	sa_family_t	ss_family;
	char		__ss_pad1[6];
#ifdef __LONG_LONG_SUPPORTED
	int64_t		__ss_align;
#else
	int32_t		__ss_align[2];
#endif
	char		__ss_pad2[112];
};

#endif /* SYS_SOCKET_H */