in.h

基于组件方式开发操作系统的OSKIT源代码

/*
 * Copyright (c) 1982, 1986, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)in.h	8.3 (Berkeley) 1/3/94
 */

#ifndef _OSKIT_C_NETINET_IN_H_
#define _OSKIT_C_NETINET_IN_H_

#include <oskit/types.h>

/*
 * Include <oskit/machine/endian.h> to get `hton[ls]' and `ntoh[ls]'.
 * FreeBSD 3.* `man' page for these funcs tells users to include <sys/param.h>.
 * But Linux 2.2 `man' page tells users to include <netinet/in.h>.
 */
#include <oskit/machine/endian.h>

/* Types used for Internet addresses and port numbers */
#ifndef _IN_ADDR_T_
#define _IN_ADDR_T_
typedef oskit_u32_t in_addr_t;
typedef oskit_u16_t in_port_t;
#endif

/*
 * Constants and structures defined by the internet system,
 * Per RFC 790, September 1981, and numerous additions.
 */

/*
 * Protocols
 */
#define	IPPROTO_IP		0		/* dummy for IP */
#define	IPPROTO_ICMP		1		/* control message protocol */
#define	IPPROTO_IGMP		2		/* group mgmt protocol */
#define	IPPROTO_GGP		3		/* gateway^2 (deprecated) */
#define IPPROTO_IPIP		4 		/* IP encapsulation in IP */
#define	IPPROTO_TCP		6		/* tcp */
#define	IPPROTO_EGP		8		/* exterior gateway protocol */
#define	IPPROTO_PUP		12		/* pup */
#define	IPPROTO_UDP		17		/* user datagram protocol */
#define	IPPROTO_IDP		22		/* xns idp */
#define	IPPROTO_TP		29 		/* tp-4 w/ class negotiation */
#define IPPROTO_RSVP		46 		/* resource reservation */
#define	IPPROTO_EON		80		/* ISO cnlp */
#define	IPPROTO_ENCAP		98		/* encapsulation header */

#define	IPPROTO_MAX		256


/*
 * Local port number conventions:
 * Ports < IPPORT_RESERVED are reserved for
 * privileged processes (e.g. root).
 * Ports > IPPORT_USERRESERVED are reserved
 * for servers, not necessarily privileged.
 */
#define	IPPORT_RESERVED		1024
#define	IPPORT_USERRESERVED	5000

#ifndef _STRUCT_IN_ADDR_
#define _STRUCT_IN_ADDR_
/*
 * Internet address (a structure for historical reasons)
 */
struct in_addr {
	in_addr_t s_addr;
};
#endif /* !_STRUCT_IN_ADDR_ */

/*
 * Special destination addresses for connect(), sendmsg(), and sendto()
 */
#define	INADDR_ANY		(in_addr_t)0x00000000
#define	INADDR_BROADCAST	(in_addr_t)0xffffffff	/* must be masked */
#define INADDR_NONE             0xffffffff              /* -1 return */

/*
 * Socket address, internet style.
 */
struct sockaddr_in {
	oskit_u8_t	sin_len;
	oskit_u8_t	sin_family;
	oskit_u16_t	sin_port;
	struct	in_addr sin_addr;
	char	sin_zero[8];
};

/*
 * Definitions of bits in internet address integers.
 * On subnets, the decomposition of addresses to host and net parts
 * is done according to subnet mask, not the masks here.
 */
#define IN_CLASSA(i)            (((long)(i) & 0x80000000) == 0)
#define IN_CLASSA_NET           0xff000000
#define IN_CLASSA_NSHIFT        24
#define IN_CLASSA_HOST          0x00ffffff
#define IN_CLASSA_MAX           128

#define IN_CLASSB(i)            (((long)(i) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET           0xffff0000
#define IN_CLASSB_NSHIFT        16
#define IN_CLASSB_HOST          0x0000ffff
#define IN_CLASSB_MAX           65536

#define IN_CLASSC(i)            (((long)(i) & 0xe0000000) == 0xc0000000)
#define IN_CLASSC_NET           0xffffff00
#define IN_CLASSC_NSHIFT        8
#define IN_CLASSC_HOST          0x000000ff

#define IN_CLASSD(i)            (((long)(i) & 0xf0000000) == 0xe0000000)
#define IN_CLASSD_NET           0xf0000000      /* These ones aren't really */
#define IN_CLASSD_NSHIFT        28              /* net and host fields, but */
#define IN_CLASSD_HOST          0x0fffffff      /* routing needn't know.    */
#define IN_MULTICAST(i)         IN_CLASSD(i)

#define IN_EXPERIMENTAL(i)      (((long)(i) & 0xf0000000) == 0xf0000000)
#define IN_BADCLASS(i)          (((long)(i) & 0xf0000000) == 0xf0000000)

#endif /* _OSKIT_C_NETINET_IN_H_ */