Home | History | Annotate | Line # | Download | only in netinet
udp_var.h revision 1.31 
      1 /*	$NetBSD: udp_var.h,v 1.31 2005/12/11 12:24:58 christos 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 } __attribute__((__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 struct	udpstat {
     55 					/* input statistics: */
     56 	u_quad_t udps_ipackets;		/* total input packets */
     57 	u_quad_t udps_hdrops;		/* packet shorter than header */
     58 	u_quad_t udps_badsum;		/* checksum error */
     59 	u_quad_t udps_badlen;		/* data length larger than packet */
     60 	u_quad_t udps_noport;		/* no socket on port */
     61 	u_quad_t udps_noportbcast;	/* of above, arrived as broadcast */
     62 	u_quad_t udps_fullsock;		/* not delivered, input socket full */
     63 	u_quad_t udps_pcbhashmiss;	/* input packets missing pcb hash */
     64 					/* output statistics: */
     65 	u_quad_t udps_opackets;		/* total output packets */
     66 };
     67 
     68 /*
     69  * Names for UDP sysctl objects
     70  */
     71 #define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
     72 #define	UDPCTL_SENDSPACE	2	/* default send buffer */
     73 #define	UDPCTL_RECVSPACE	3	/* default recv buffer */
     74 #define	UDPCTL_LOOPBACKCKSUM	4	/* do UDP checksum on loopback */
     75 #define	UDPCTL_STATS		5	/* UDP statistics */
     76 #define	UDPCTL_MAXID		6
     77 
     78 #define UDPCTL_NAMES { \
     79 	{ 0, 0 }, \
     80 	{ "checksum", CTLTYPE_INT }, \
     81 	{ "sendspace", CTLTYPE_INT }, \
     82 	{ "recvspace", CTLTYPE_INT }, \
     83 	{ "do_loopback_cksum", CTLTYPE_INT }, \
     84 	{ "stats", CTLTYPE_STRUCT }, \
     85 }
     86 
     87 #ifdef _KERNEL
     88 extern	struct	inpcbtable udbtable;
     89 extern	struct	udpstat udpstat;
     90 
     91 #ifdef __NO_STRICT_ALIGNMENT
     92 #define	UDP_HDR_ALIGNED_P(uh)	1
     93 #else
     94 #define	UDP_HDR_ALIGNED_P(uh)	((((vaddr_t) (uh)) & 3) == 0)
     95 #endif
     96 
     97 void	 *udp_ctlinput(int, struct sockaddr *, void *);
     98 int	 udp_ctloutput(int, struct socket *, int, int, struct mbuf **);
     99 void	 udp_init(void);
    100 void	 udp_input(struct mbuf *, ...);
    101 int	 udp_output(struct mbuf *, ...);
    102 int	 udp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
    103 int	 udp_usrreq(struct socket *,
    104 	    int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
    105 
    106 int	 udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int,
    107 	    int);
    108 #endif
    109 
    110 #endif /* !_NETINET_UDP_VAR_H_ */
    111