www.pudn.com > Nwpro.rar > UDP_VAR.H, change:2003-02-25,size:3672b

/* 
 * Copyright (c) 1982, 1986, 1989, 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. 
 * 
 *	@(#)udp_var.h	8.1 (Berkeley) 6/10/93 
 */ 
 
/* 
 * 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 { 
				/* input statistics: */ 
	u_long	udps_ipackets;		/* total input packets */ 
	u_long	udps_hdrops;		/* packet shorter than header */ 
	u_long	udps_badsum;		/* checksum error */ 
	u_long	udps_badlen;		/* data length larger than packet */ 
	u_long	udps_noport;		/* no socket on port */ 
	u_long	udps_noportbcast;	/* of above, arrived as broadcast */ 
	u_long	udps_fullsock;		/* not delivered, input socket full */ 
	u_long	udpps_pcbcachemiss;	/* input packets missing pcb cache */ 
				/* output statistics: */ 
	u_long	udps_opackets;		/* total output packets */ 
}; 
 
/* 
 * Names for UDP sysctl objects 
 */ 
#define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */ 
#define UDPCTL_MAXID		2 
 
#define UDPCTL_NAMES { \ 
	{ 0, 0 }, \ 
	{ "checksum", CTLTYPE_INT }, \ 
} 
 
#ifdef KERNEL 
struct	inpcb udb; 
struct	udpstat udpstat; 
 
void	 udp_ctlinput __P((int, struct sockaddr *, struct ip *)); 
void	 udp_init __P((void)); 
void	 udp_input __P((struct mbuf *, int)); 
int	 udp_output __P((struct inpcb *, 
	    struct mbuf *, struct mbuf *, struct mbuf *)); 
int	 udp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 
int	 udp_usrreq __P((struct socket *, 
	    int, struct mbuf *, struct mbuf *, struct mbuf *)); 
#endif