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UDP_VAR.H

/*
 * Copyright (c) 1982, 1986, 1989, 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_var.h     8.1 (Berkeley) 6/10/93
 */

/*
 * 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

struct      udpstat {
                        /* input statistics: */
      n_long      udps_ipackets;          /* total input packets */
      n_long      udps_hdrops;            /* packet shorter than header */
      n_long      udps_badsum;            /* checksum error */
      n_long      udps_badlen;            /* data length larger than packet */
      n_long      udps_noport;            /* no socket on port */
      n_long      udps_noportbcast; /* of above, arrived as broadcast */
      n_long      udps_fullsock;          /* not delivered, input socket full */
      n_long      udpps_pcbcachemiss;     /* input packets missing pcb cache */
                        /* output statistics: */
      n_long      udps_opackets;          /* total output packets */
};

/*
 * Names for UDP sysctl objects
 */
#define     UDPCTL_CHECKSUM         1     /* checksum UDP packets */
#define UDPCTL_MAXID          2

#define UDPCTL_NAMES { \
      { 0, 0 }, \
      { "checksum", CTLTYPE_INT }, \
}

#ifdef KERNEL
struct      inpcb udb;
struct      udpstat udpstat;

void   udp_ctlinput __P((int, struct sockaddr *, struct ip *));
void   udp_init __P((void));
void   udp_input __P((struct mbuf *, int));
int    udp_output __P((struct inpcb *,
          struct mbuf *, struct mbuf *, struct mbuf *));
int    udp_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
int    udp_usrreq __P((struct socket *,
          int, struct mbuf *, struct mbuf *, struct mbuf *));
#endif

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