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

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