The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*
    2  * Copyright (c) 1982, 1986, 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)udp_var.h   8.1 (Berkeley) 6/10/93
   34  * $FreeBSD: releng/5.1/sys/netinet/udp_var.h 98211 2002-06-14 08:35:21Z hsu $
   35  */
   36 
   37 #ifndef _NETINET_UDP_VAR_H_
   38 #define _NETINET_UDP_VAR_H_
   39 
   40 /*
   41  * UDP kernel structures and variables.
   42  */
   43 struct  udpiphdr {
   44         struct  ipovly ui_i;            /* overlaid ip structure */
   45         struct  udphdr ui_u;            /* udp header */
   46 };
   47 #define ui_x1           ui_i.ih_x1
   48 #define ui_pr           ui_i.ih_pr
   49 #define ui_len          ui_i.ih_len
   50 #define ui_src          ui_i.ih_src
   51 #define ui_dst          ui_i.ih_dst
   52 #define ui_sport        ui_u.uh_sport
   53 #define ui_dport        ui_u.uh_dport
   54 #define ui_ulen         ui_u.uh_ulen
   55 #define ui_sum          ui_u.uh_sum
   56 
   57 struct  udpstat {
   58                                 /* input statistics: */
   59         u_long  udps_ipackets;          /* total input packets */
   60         u_long  udps_hdrops;            /* packet shorter than header */
   61         u_long  udps_badsum;            /* checksum error */
   62         u_long  udps_nosum;             /* no checksum */
   63         u_long  udps_badlen;            /* data length larger than packet */
   64         u_long  udps_noport;            /* no socket on port */
   65         u_long  udps_noportbcast;       /* of above, arrived as broadcast */
   66         u_long  udps_fullsock;          /* not delivered, input socket full */
   67         u_long  udpps_pcbcachemiss;     /* input packets missing pcb cache */
   68         u_long  udpps_pcbhashmiss;      /* input packets not for hashed pcb */
   69                                 /* output statistics: */
   70         u_long  udps_opackets;          /* total output packets */
   71         u_long  udps_fastout;           /* output packets on fast path */
   72         /* of no socket on port, arrived as multicast */
   73         u_long  udps_noportmcast;
   74 };
   75 
   76 /*
   77  * Names for UDP sysctl objects
   78  */
   79 #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
   80 #define UDPCTL_STATS            2       /* statistics (read-only) */
   81 #define UDPCTL_MAXDGRAM         3       /* max datagram size */
   82 #define UDPCTL_RECVSPACE        4       /* default receive buffer space */
   83 #define UDPCTL_PCBLIST          5       /* list of PCBs for UDP sockets */
   84 #define UDPCTL_MAXID            6
   85 
   86 #define UDPCTL_NAMES { \
   87         { 0, 0 }, \
   88         { "checksum", CTLTYPE_INT }, \
   89         { "stats", CTLTYPE_STRUCT }, \
   90         { "maxdgram", CTLTYPE_INT }, \
   91         { "recvspace", CTLTYPE_INT }, \
   92         { "pcblist", CTLTYPE_STRUCT }, \
   93 }
   94 
   95 #ifdef _KERNEL
   96 SYSCTL_DECL(_net_inet_udp);
   97 
   98 extern struct   pr_usrreqs udp_usrreqs;
   99 extern struct   inpcbhead udb;
  100 extern struct   inpcbinfo udbinfo;
  101 extern u_long   udp_sendspace;
  102 extern u_long   udp_recvspace;
  103 extern struct   udpstat udpstat;
  104 extern int      log_in_vain;
  105 
  106 void    udp_ctlinput(int, struct sockaddr *, void *);
  107 void    udp_init(void);
  108 void    udp_input(struct mbuf *, int);
  109 
  110 struct inpcb *
  111         udp_notify(struct inpcb *inp, int errno);
  112 int     udp_shutdown(struct socket *so);
  113 #endif
  114 
  115 #endif

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