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[apple/xnu.git] / bsd / netinet / udp_var.h

/*
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/*
 * Copyright (c) 1982, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
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 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
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 *    may be used to endorse or promote products derived from this software
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 * 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
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 *
 *	@(#)udp_var.h	8.1 (Berkeley) 6/10/93
 */

#ifndef _NETINET_UDP_VAR_H_
#define _NETINET_UDP_VAR_H_

#include <sys/sysctl.h>

/*
 * UDP kernel structures and variables.
 */
struct	udpiphdr {
	struct 	ipovly ui_i;		/* overlaid ip structure */
	struct	udphdr ui_u;		/* udp header */
};
#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
#define ui_next		ui_i.ih_next
#define ui_prev		ui_i.ih_prev

struct	udpcb {
	/* XXX - these should be by reference so we can do options quickly */
	struct	ip udb_ip;
	struct	udphdr udb_uh;
	struct	sockaddr_in udb_conn;
	struct	in_hostcache *udb_hc;
	struct	mbuf *udb_queue;
};
#define	inptoudpcb(inp)	((struct udpdb *)(inp)->inp_ppcb)

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 */
	u_long	udpps_pcbhashmiss;	/* input packets not for hashed pcb */
				/* output statistics: */
	u_long	udps_opackets;		/* total output packets */
	u_long	udps_fastout;		/* output packets on fast path */
};

/*
 * Names for UDP sysctl objects
 */
#define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
#define UDPCTL_STATS		2	/* statistics (read-only) */
#define	UDPCTL_MAXDGRAM		3	/* max datagram size */
#define	UDPCTL_RECVSPACE	4	/* default receive buffer space */
#define	UDPCTL_PCBLIST		5	/* list of PCBs for UDP sockets */
#define UDPCTL_MAXID		6

#define UDPCTL_NAMES { \
	{ 0, 0 }, \
	{ "checksum", CTLTYPE_INT }, \
	{ "stats", CTLTYPE_STRUCT }, \
	{ "maxdgram", CTLTYPE_INT }, \
	{ "recvspace", CTLTYPE_INT }, \
	{ "pcblist", CTLTYPE_STRUCT }, \
}

#ifdef KERNEL
SYSCTL_DECL(_net_inet_udp);

extern struct	pr_usrreqs udp_usrreqs;
extern struct	inpcbhead udb;
extern struct	inpcbinfo udbinfo;
extern u_long	udp_sendspace;
extern u_long	udp_recvspace;
extern struct udpstat udpstat;
extern int	log_in_vain;

void	udp_ctlinput __P((int, struct sockaddr *, void *));
void	udp_init __P((void));
void	udp_input __P((struct mbuf *, int));

void	udp_notify __P((struct inpcb *inp, int errno));
int	udp_shutdown __P((struct socket *so));
#endif

#endif