/* * 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 16192extern 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_sumstruct 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 */};/* * Names for UDP sysctl objects */#define UDPCTL_CHECKSUM         1       /* checksum UDP packets */#define UDPCTL_MAXID            2extern struct udpstat udpstat;extern struct socket udb;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 *));u_int8_t udp_tos _P((struct socket *));void udp_emu _P((struct socket *, struct mbuf *));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