The Tcpdump Group git mirrors - tcpdump/blob - linux-include/netinet/udp_var.h

   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  */
  35
  36 /*
  37  * UDP kernel structures and variables.
  38  */
  39 struct  udpiphdr {
  40         struct  ipovly ui_i;            /* overlaid ip structure */
  41         struct  udphdr ui_u;            /* udp header */
  42 } __attribute__ ((packed));
  43 #define ui_next         ui_i.ih_next
  44 #define ui_prev         ui_i.ih_prev
  45 #define ui_x1           ui_i.ih_x1
  46 #define ui_pr           ui_i.ih_pr
  47 #define ui_len          ui_i.ih_len
  48 #define ui_src          ui_i.ih_src
  49 #define ui_dst          ui_i.ih_dst
  50 #define ui_sport        ui_u.uh_sport
  51 #define ui_dport        ui_u.uh_dport
  52 #define ui_ulen         ui_u.uh_ulen
  53 #define ui_sum          ui_u.uh_sum
  54
  55 struct  udpstat {
  56                                 /* input statistics: */
  57         n_long  udps_ipackets;          /* total input packets */
  58         n_long  udps_hdrops;            /* packet shorter than header */
  59         n_long  udps_badsum;            /* checksum error */
  60         n_long  udps_badlen;            /* data length larger than packet */
  61         n_long  udps_noport;            /* no socket on port */
  62         n_long  udps_noportbcast;       /* of above, arrived as broadcast */
  63         n_long  udps_fullsock;          /* not delivered, input socket full */
  64         n_long  udpps_pcbcachemiss;     /* input packets missing pcb cache */
  65                                 /* output statistics: */
  66         n_long  udps_opackets;          /* total output packets */
  67 };
  68
  69 /*
  70  * Names for UDP sysctl objects
  71  */
  72 #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
  73 #define UDPCTL_MAXID            2
  74
  75 #define UDPCTL_NAMES { \
  76         { 0, 0 }, \
  77         { "checksum", CTLTYPE_INT }, \
  78 }
  79
  80 #ifdef KERNEL
  81 struct  inpcb udb;
  82 struct  udpstat udpstat;
  83
  84 void     udp_ctlinput (int, struct sockaddr *, struct ip *);
  85 void     udp_init (void);
  86 void     udp_input (struct mbuf *, int);
  87 int      udp_output (struct inpcb *,
  88             struct mbuf *, struct mbuf *, struct mbuf *);
  89 int      udp_sysctl (int *, u_int, void *, size_t *, void *, size_t);
  90 int      udp_usrreq (struct socket *,
  91             int, struct mbuf *, struct mbuf *, struct mbuf *);
  92 #endif