sys/netinet/udp_var.h

   1 /*      $NetBSD: udp_var.h,v 1.37 2011/09/24 17:18:17 christos Exp $    */
   2
   3 /*
   4  * Copyright (c) 1982, 1986, 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)udp_var.h   8.1 (Berkeley) 6/10/93
  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 } __packed;
  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 /*
  55  * UDP statistics.
  56  * Each counter is an unsigned 64-bit value.
  57  */
  58 #define UDP_STAT_IPACKETS       0       /* total input packets */
  59 #define UDP_STAT_HDROPS         1       /* packet shorter than header */
  60 #define UDP_STAT_BADSUM         2       /* checksum error */
  61 #define UDP_STAT_BADLEN         3       /* data length larger than packet */
  62 #define UDP_STAT_NOPORT         4       /* no socket on port */
  63 #define UDP_STAT_NOPORTBCAST    5       /* of above, arrived as broadcast */
  64 #define UDP_STAT_FULLSOCK       6       /* not delivered, input socket full */
  65 #define UDP_STAT_PCBHASHMISS    7       /* input packets missing PCB hash */
  66 #define UDP_STAT_OPACKETS       8       /* total output packets */
  67
  68 #define UDP_NSTATS              9
  69
  70 /*
  71  * Names for UDP sysctl objects
  72  */
  73 #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
  74 #define UDPCTL_SENDSPACE        2       /* default send buffer */
  75 #define UDPCTL_RECVSPACE        3       /* default recv buffer */
  76 #define UDPCTL_LOOPBACKCKSUM    4       /* do UDP checksum on loopback */
  77 #define UDPCTL_STATS            5       /* UDP statistics */
  78 #define UDPCTL_RFC6056          6       /* RFC 6056 algorithm selection */
  79 #define UDPCTL_MAXID            7
  80
  81 #define UDPCTL_NAMES { \
  82         { 0, 0 }, \
  83         { "checksum", CTLTYPE_INT }, \
  84         { "sendspace", CTLTYPE_INT }, \
  85         { "recvspace", CTLTYPE_INT }, \
  86         { "do_loopback_cksum", CTLTYPE_INT }, \
  87         { "stats", CTLTYPE_STRUCT }, \
  88         { "rfc6056", CTLTYPE_INT }, \
  89 }
  90
  91 #ifdef _KERNEL
  92 extern  struct  inpcbtable udbtable;
  93
  94 void     *udp_ctlinput(int, const struct sockaddr *, void *);
  95 int      udp_ctloutput(int, struct socket *, struct sockopt *);
  96 void     udp_init(void);
  97 void     udp_input(struct mbuf *, ...);
  98 int      udp_output(struct mbuf *, ...);
  99 int      udp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
 100 int      udp_usrreq(struct socket *,
 101             int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
 102
 103 int     udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int,
 104             int);
 105 void    udp_statinc(u_int);
 106 #endif /* _KERNEL */
 107
 108 #endif /* !_NETINET_UDP_VAR_H_ */