udp_var.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*
#ifndef lint
static	char	*sccsid = "@(#)udp_var.h	4.1		(ULTRIX)	7/2/90";
#endif lint
*/
/************************************************************************
 *									*
 *			Copyright (c) 1984 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/*	udp_var.h	6.1	83/07/29	*/

/*
 * UDP kernel structures and variables.
 */
struct	udpiphdr {
	struct 	ipovly ui_i;		/* overlaid ip structure */
	struct	udphdr ui_u;		/* udp header */
};
#define	ui_next		ui_i.ih_next
#define	ui_prev		ui_i.ih_prev
#define	ui_x1		ui_i.ih_x1
#define	ui_pr		ui_i.ih_pr
#define	ui_len		ui_i.ih_len
#define	ui_src		ui_i.ih_src
#define	ui_dst		ui_i.ih_dst
#define	ui_sport	ui_u.uh_sport
#define	ui_dport	ui_u.uh_dport
#define	ui_ulen		ui_u.uh_ulen
#define	ui_sum		ui_u.uh_sum

struct	udpstat {
	int	udps_hdrops;
	int	udps_badsum;
	int	udps_badlen;
	int	udps_total;
	int	udps_nospace;
	int	udps_indatagrams;	/* Total pkt delivered to UDP users */
	int	udps_outdatagrams;	/* Total pkt sent from UDP */
	int	udps_noports;		/* Total pkt received w/o dest. port */
};

#define UDP_TTL		30		/* time to live for UDP packets */

#define UDPSTAT(x) udpstat.x

#ifdef KERNEL
#ifdef XTI
struct t_info xti_udpinfo;
#endif /* XTI */
struct	inpcb udb;
struct	udpstat udpstat;
extern  struct  lock_t lk_udpstat;	/* SMP: udpstat lock */
#endif