FreeBSD/Linux Kernel Cross Reference
sys/netinet/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
     * $FreeBSD$
     */
    
    #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 */
    };
    #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  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
   extern struct   pr_usrreqs udp_usrreqs;
   extern struct   inpcbinfo udbinfo;
   
   void     udp_ctlinput __P((int, struct sockaddr *, void *));
   void     udp_init __P((void));
   void     udp_input __P((struct mbuf *, int));
   #endif
   
   #endif

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