FreeBSD/Linux Kernel Cross Reference
sys/netinet/udp_var.h

     /*      $NetBSD: udp_var.h,v 1.48 2021/02/03 11:53:43 roy Exp $ */
     
     /*
      * 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. 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
     */
    
    #ifndef _NETINET_UDP_VAR_H_
    #define _NETINET_UDP_VAR_H_
    
    /*
     * UDP kernel structures and variables.
     */
    struct  udpiphdr {
            struct  ipovly ui_i;            /* overlaid ip structure */
            struct  udphdr ui_u;            /* udp header */
    };
    #ifdef CTASSERT
    CTASSERT(sizeof(struct udpiphdr) == 28);
    #endif
    #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
    
    /*
     * UDP statistics.
     * Each counter is an unsigned 64-bit value.
     */
    #define UDP_STAT_IPACKETS       0       /* total input packets */
    #define UDP_STAT_HDROPS         1       /* packet shorter than header */
    #define UDP_STAT_BADSUM         2       /* checksum error */
    #define UDP_STAT_BADLEN         3       /* data length larger than packet */
    #define UDP_STAT_NOPORT         4       /* no socket on port */
    #define UDP_STAT_NOPORTBCAST    5       /* of above, arrived as broadcast */
    #define UDP_STAT_FULLSOCK       6       /* not delivered, input socket full */
    #define UDP_STAT_PCBHASHMISS    7       /* input packets missing PCB hash */
    #define UDP_STAT_OPACKETS       8       /* total output packets */
    
    #define UDP_NSTATS              9
    
    /*
     * Names for UDP sysctl objects
     */
    #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
    #define UDPCTL_SENDSPACE        2       /* default send buffer */
    #define UDPCTL_RECVSPACE        3       /* default recv buffer */
    #define UDPCTL_LOOPBACKCKSUM    4       /* do UDP checksum on loopback */
    #define UDPCTL_STATS            5       /* UDP statistics */
    
    #ifdef _KERNEL
    
    extern struct inpcbtable udbtable;
    extern const struct pr_usrreqs udp_usrreqs;
    
    void *udp_ctlinput(int, const struct sockaddr *, void *);
    int udp_ctloutput(int, struct socket *, struct sockopt *);
    void udp_init(void);
    void udp_init_common(void);
    void udp_input(struct mbuf *, int, int);
    int udp_output(struct mbuf *, struct inpcb *, struct mbuf *, struct lwp *);
    int udp_send(struct socket *, struct mbuf *, struct sockaddr *,
        struct mbuf *, struct lwp *);
    int udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int, int);
    void udp_statinc(u_int);
    #endif /* _KERNEL */
    
    #endif /* !_NETINET_UDP_VAR_H_ */

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