#ifndef SYS_SOCKET_H
#define SYS_SOCKET_H

#include <sys/time.h>

/*
 * Level number for (get/set)sockopt() to apply to socket itself.
 */
#define  SOL_SOCKET  0xfff    /* options for socket level */
# define SOL_TCP                6       /* TCP level */

#define PF_UNSPEC		0
#define PF_INET			2
#define PF_INET6		10

#define AF_UNSPEC		PF_UNSPEC
#define AF_INET			PF_INET
#define AF_INET6		PF_INET6

#define SOCK_STREAM		1
#define SOCK_DGRAM		2

// need to sync FIO* values with commonly accepted ones sometime
#define FIONBIO			1
#define FIONREAD		2

#define SOCKET_ERROR	-1

// send()/recv()/etc flags
// at present, only MSG_PEEK is implemented though.
#define MSG_WAITALL		0x40000000
#define MSG_TRUNC		0x20000000
#define MSG_PEEK		0x10000000
#define MSG_OOB			0x08000000
#define MSG_EOR			0x04000000
#define MSG_DONTROUTE	0x02000000
#define MSG_CTRUNC		0x01000000

// shutdown() flags:
#define SHUT_RD			1
#define SHUT_WR			2
#define SHUT_RDWR		3

/*
 * Option flags per-socket.
 */
#define  SO_DEBUG  0x0001    /* turn on debugging info recording */
#define  SO_ACCEPTCONN  0x0002    /* socket has had listen() */
#define  SO_REUSEADDR  0x0004    /* allow local address reuse */
#define  SO_KEEPALIVE  0x0008    /* keep connections alive */
#define  SO_DONTROUTE  0x0010    /* just use interface addresses */
#define  SO_BROADCAST  0x0020    /* permit sending of broadcast msgs */
#define  SO_USELOOPBACK  0x0040    /* bypass hardware when possible */
#define  SO_LINGER  0x0080    /* linger on close if data present */
#define  SO_OOBINLINE  0x0100    /* leave received OOB data in line */
#define  SO_REUSEPORT   0x0200      /* allow local address & port reuse */

#define SO_DONTLINGER   (int)(~SO_LINGER)

/*
 * Additional options, not kept in so_options.
 */
#define SO_SNDBUF  0x1001    /* send buffer size */
#define SO_RCVBUF  0x1002    /* receive buffer size */
#define SO_SNDLOWAT  0x1003    /* send low-water mark */
#define SO_RCVLOWAT  0x1004    /* receive low-water mark */
#define SO_SNDTIMEO  0x1005    /* send timeout */
#define SO_RCVTIMEO  0x1006    /* receive timeout */
#define  SO_ERROR  0x1007    /* get error status and clear */
#define  SO_TYPE    0x1008    /* get socket type */

struct sockaddr {
	unsigned short	sa_family;
	char		sa_data[14];
};

#ifndef ntohs
#define ntohs(num) htons(num)
#define ntohl(num) htonl(num)
#endif

#ifdef __cplusplus
extern "C" {
#endif

	int socket(int domain, int type, int protocol);
	int bind(int socket, const struct sockaddr * addr, int addr_len);
	int connect(int socket, const struct sockaddr * addr, int addr_len);
	int send(int socket, const void * data, int sendlength, int flags);
	int recv(int socket, void * data, int recvlength, int flags);
	int sendto(int socket, const void * data, int sendlength, int flags, const struct sockaddr * addr, int addr_len);
	int recvfrom(int socket, void * data, int recvlength, int flags, struct sockaddr * addr, int * addr_len);
	int listen(int socket, int max_connections);
	int accept(int socket, struct sockaddr * addr, int * addr_len);
	int shutdown(int socket, int shutdown_type);
	int closesocket(int socket);

	int ioctl(int socket, long cmd, void * arg);

	int setsockopt(int socket, int level, int option_name, const void * data, int data_len);
	int getsockopt(int socket, int level, int option_name, void * data, int * data_len);

	int getpeername(int socket, struct sockaddr *addr, int * addr_len);
	int getsockname(int socket, struct sockaddr *addr, int * addr_len);

	int gethostname(char *name, size_t len);
	int sethostname(const char *name, size_t len);

	unsigned short htons(unsigned short num);
	unsigned long htonl(unsigned long num);

	extern int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *timeout);

#ifdef __cplusplus
};
#endif


#endif // SYS_SOCKET_H