/*

 * Copyright (c) 1982, 1986, 1993

 *	The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *	This product includes software developed by the University of

 *	California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * 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

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *	@(#)udp.h	8.1 (Berkeley) 6/10/93

 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp

 */

#ifndef _UDP_H_

#define _UDP_H_

#define UDP_TTL 0x60

#define UDP_UDPDATALEN 16192

extern struct socket *udp_last_so;

/*

 * Udp protocol header.

 * Per RFC 768, September, 1981.

 */

struct udphdr {

	u_int16_t	uh_sport;		/* source port */

	u_int16_t	uh_dport;		/* destination port */

	int16_t	uh_ulen;		/* udp length */

	u_int16_t	uh_sum;			/* udp checksum */

};

/*

 * UDP kernel structures and variables.

 */

struct udpiphdr {

	        struct  ipovly ui_i;            /* overlaid ip structure */

	        struct  udphdr ui_u;            /* udp header */

};

#define ui_next         ui_i.ih_next

#define ui_prev         ui_i.ih_prev

#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

#ifdef LOG_ENABLED

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 */

	                                /* output statistics: */

	        u_long  udps_opackets;          /* total output packets */

};

#endif

/*

 * Names for UDP sysctl objects

 */

#define UDPCTL_CHECKSUM         1       /* checksum UDP packets */

#define UDPCTL_MAXID            2

#ifdef LOG_ENABLED

extern struct udpstat udpstat;

#endif

extern struct socket udb;

struct mbuf;

void udp_init _P((void));

void udp_input _P((register struct mbuf *, int));

int udp_output _P((struct socket *, struct mbuf *, struct sockaddr_in *));

int udp_attach _P((struct socket *));

void udp_detach _P((struct socket *));

struct socket * udp_listen _P((u_int, u_int32_t, u_int, int));

int udp_output2(struct socket *so, struct mbuf *m,

                struct sockaddr_in *saddr, struct sockaddr_in *daddr,

                int iptos);

#endif