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      1 /*	$NetBSD: udp_var.h,v 1.48 2021/02/03 11:53:43 roy Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986, 1989, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)udp_var.h	8.1 (Berkeley) 6/10/93
     32  */
     33 
     34 #ifndef _NETINET_UDP_VAR_H_
     35 #define _NETINET_UDP_VAR_H_
     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 #ifdef CTASSERT
     45 CTASSERT(sizeof(struct udpiphdr) == 28);
     46 #endif
     47 #define	ui_x1		ui_i.ih_x1
     48 #define	ui_pr		ui_i.ih_pr
     49 #define	ui_len		ui_i.ih_len
     50 #define	ui_src		ui_i.ih_src
     51 #define	ui_dst		ui_i.ih_dst
     52 #define	ui_sport	ui_u.uh_sport
     53 #define	ui_dport	ui_u.uh_dport
     54 #define	ui_ulen		ui_u.uh_ulen
     55 #define	ui_sum		ui_u.uh_sum
     56 
     57 /*
     58  * UDP statistics.
     59  * Each counter is an unsigned 64-bit value.
     60  */
     61 #define	UDP_STAT_IPACKETS	0	/* total input packets */
     62 #define	UDP_STAT_HDROPS		1	/* packet shorter than header */
     63 #define	UDP_STAT_BADSUM		2	/* checksum error */
     64 #define	UDP_STAT_BADLEN		3	/* data length larger than packet */
     65 #define	UDP_STAT_NOPORT		4	/* no socket on port */
     66 #define	UDP_STAT_NOPORTBCAST	5	/* of above, arrived as broadcast */
     67 #define	UDP_STAT_FULLSOCK	6	/* not delivered, input socket full */
     68 #define	UDP_STAT_PCBHASHMISS	7	/* input packets missing PCB hash */
     69 #define	UDP_STAT_OPACKETS	8	/* total output packets */
     70 
     71 #define	UDP_NSTATS		9
     72 
     73 /*
     74  * Names for UDP sysctl objects
     75  */
     76 #define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
     77 #define	UDPCTL_SENDSPACE	2	/* default send buffer */
     78 #define	UDPCTL_RECVSPACE	3	/* default recv buffer */
     79 #define	UDPCTL_LOOPBACKCKSUM	4	/* do UDP checksum on loopback */
     80 #define	UDPCTL_STATS		5	/* UDP statistics */
     81 
     82 #ifdef _KERNEL
     83 
     84 extern struct inpcbtable udbtable;
     85 extern const struct pr_usrreqs udp_usrreqs;
     86 
     87 void *udp_ctlinput(int, const struct sockaddr *, void *);
     88 int udp_ctloutput(int, struct socket *, struct sockopt *);
     89 void udp_init(void);
     90 void udp_init_common(void);
     91 void udp_input(struct mbuf *, int, int);
     92 int udp_output(struct mbuf *, struct inpcb *, struct mbuf *, struct lwp *);
     93 int udp_send(struct socket *, struct mbuf *, struct sockaddr *,
     94     struct mbuf *, struct lwp *);
     95 int udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int, int);
     96 void udp_statinc(u_int);
     97 #endif /* _KERNEL */
     98 
     99 #endif /* !_NETINET_UDP_VAR_H_ */
    100