4.3BSD-UWisc/include/netinet/udp_var.h

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/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)udp_var.h	7.1 (Berkeley) 6/5/86
 */
/*
 * RCS Info	
 *	$Header: udp_var.h,v 3.1 86/10/22 13:36:45 tadl Exp $
 *	$Locker:  $
 */

/*
 * 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;
};

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

#ifdef KERNEL
struct	inpcb udb;
struct	udpstat udpstat;
#endif