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udp_var.h revision 1.40 
      1 /*	$NetBSD: udp_var.h,v 1.40 2014/05/18 14:46:16 rmind 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 } __packed;
     44 #define	ui_x1		ui_i.ih_x1
     45 #define	ui_pr		ui_i.ih_pr
     46 #define	ui_len		ui_i.ih_len
     47 #define	ui_src		ui_i.ih_src
     48 #define	ui_dst		ui_i.ih_dst
     49 #define	ui_sport	ui_u.uh_sport
     50 #define	ui_dport	ui_u.uh_dport
     51 #define	ui_ulen		ui_u.uh_ulen
     52 #define	ui_sum		ui_u.uh_sum
     53 
     54 /*
     55  * UDP statistics.
     56  * Each counter is an unsigned 64-bit value.
     57  */
     58 #define	UDP_STAT_IPACKETS	0	/* total input packets */
     59 #define	UDP_STAT_HDROPS		1	/* packet shorter than header */
     60 #define	UDP_STAT_BADSUM		2	/* checksum error */
     61 #define	UDP_STAT_BADLEN		3	/* data length larger than packet */
     62 #define	UDP_STAT_NOPORT		4	/* no socket on port */
     63 #define	UDP_STAT_NOPORTBCAST	5	/* of above, arrived as broadcast */
     64 #define	UDP_STAT_FULLSOCK	6	/* not delivered, input socket full */
     65 #define	UDP_STAT_PCBHASHMISS	7	/* input packets missing PCB hash */
     66 #define	UDP_STAT_OPACKETS	8	/* total output packets */
     67 
     68 #define	UDP_NSTATS		9
     69 
     70 /*
     71  * Names for UDP sysctl objects
     72  */
     73 #define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
     74 #define	UDPCTL_SENDSPACE	2	/* default send buffer */
     75 #define	UDPCTL_RECVSPACE	3	/* default recv buffer */
     76 #define	UDPCTL_LOOPBACKCKSUM	4	/* do UDP checksum on loopback */
     77 #define	UDPCTL_STATS		5	/* UDP statistics */
     78 #define	UDPCTL_MAXID		7
     79 
     80 #define UDPCTL_NAMES { \
     81 	{ 0, 0 }, \
     82 	{ "checksum", CTLTYPE_INT }, \
     83 	{ "sendspace", CTLTYPE_INT }, \
     84 	{ "recvspace", CTLTYPE_INT }, \
     85 	{ "do_loopback_cksum", CTLTYPE_INT }, \
     86 	{ "stats", CTLTYPE_STRUCT }, \
     87 }
     88 
     89 #ifdef _KERNEL
     90 
     91 extern	struct	inpcbtable udbtable;
     92 extern const struct pr_usrreqs udp_usrreqs;
     93 
     94 void	 *udp_ctlinput(int, const struct sockaddr *, void *);
     95 int	 udp_ctloutput(int, struct socket *, struct sockopt *);
     96 void	 udp_init(void);
     97 void	 udp_init_common(void);
     98 void	 udp_input(struct mbuf *, ...);
     99 int	 udp_output(struct mbuf *, ...);
    100 int	 udp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
    101 
    102 int	udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int,
    103 	    int);
    104 void	udp_statinc(u_int);
    105 #endif /* _KERNEL */
    106 
    107 #endif /* !_NETINET_UDP_VAR_H_ */
    108