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udp_var.h revision 1.6 
      1 /*
      2  * Copyright (c) 1982, 1986, 1989, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	from: @(#)udp_var.h	8.1 (Berkeley) 6/10/93
     34  *	$Id: udp_var.h,v 1.6 1994/05/13 06:06:58 mycroft Exp $
     35  */
     36 
     37 /*
     38  * UDP kernel structures and variables.
     39  */
     40 struct	udpiphdr {
     41 	struct 	ipovly ui_i;		/* overlaid ip structure */
     42 	struct	udphdr ui_u;		/* udp header */
     43 };
     44 #define	ui_next		ui_i.ih_next
     45 #define	ui_prev		ui_i.ih_prev
     46 #define	ui_x1		ui_i.ih_x1
     47 #define	ui_pr		ui_i.ih_pr
     48 #define	ui_len		ui_i.ih_len
     49 #define	ui_src		ui_i.ih_src
     50 #define	ui_dst		ui_i.ih_dst
     51 #define	ui_sport	ui_u.uh_sport
     52 #define	ui_dport	ui_u.uh_dport
     53 #define	ui_ulen		ui_u.uh_ulen
     54 #define	ui_sum		ui_u.uh_sum
     55 
     56 struct	udpstat {
     57 				/* input statistics: */
     58 	u_long	udps_ipackets;		/* total input packets */
     59 	u_long	udps_hdrops;		/* packet shorter than header */
     60 	u_long	udps_badsum;		/* checksum error */
     61 	u_long	udps_badlen;		/* data length larger than packet */
     62 	u_long	udps_noport;		/* no socket on port */
     63 	u_long	udps_noportbcast;	/* of above, arrived as broadcast */
     64 	u_long	udps_fullsock;		/* not delivered, input socket full */
     65 	u_long	udpps_pcbcachemiss;	/* input packets missing pcb cache */
     66 				/* output statistics: */
     67 	u_long	udps_opackets;		/* total output packets */
     68 };
     69 
     70 /*
     71  * Names for UDP sysctl objects
     72  */
     73 #define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
     74 #define UDPCTL_MAXID		2
     75 
     76 #define UDPCTL_NAMES { \
     77 	{ 0, 0 }, \
     78 	{ "checksum", CTLTYPE_INT }, \
     79 }
     80 
     81 #ifdef KERNEL
     82 struct	inpcb udb;
     83 struct	udpstat udpstat;
     84 
     85 void	 udp_ctlinput __P((int, struct sockaddr *, struct ip *));
     86 void	 udp_init __P((void));
     87 void	 udp_input __P((struct mbuf *, int));
     88 int	 udp_output __P((struct inpcb *,
     89 	    struct mbuf *, struct mbuf *, struct mbuf *));
     90 int	 udp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
     91 int	 udp_usrreq __P((struct socket *,
     92 	    int, struct mbuf *, struct mbuf *, struct mbuf *));
     93 #endif
     94