slirp/udp.h

   1 /*
   2  * Copyright (c) 1982, 1986, 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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)udp.h       8.1 (Berkeley) 6/10/93
  30  * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
  31  */
  32
  33 #ifndef _UDP_H_
  34 #define _UDP_H_
  35
  36 #define UDP_TTL 0x60
  37 #define UDP_UDPDATALEN 16192
  38
  39 /*
  40  * Udp protocol header.
  41  * Per RFC 768, September, 1981.
  42  */
  43 struct udphdr {
  44         u_int16_t       uh_sport;               /* source port */
  45         u_int16_t       uh_dport;               /* destination port */
  46         int16_t uh_ulen;                /* udp length */
  47         u_int16_t       uh_sum;                 /* udp checksum */
  48 };
  49
  50 /*
  51  * UDP kernel structures and variables.
  52  */
  53 struct udpiphdr {
  54                 struct  ipovly ui_i;            /* overlaid ip structure */
  55                 struct  udphdr ui_u;            /* udp header */
  56 };
  57 #define ui_mbuf         ui_i.ih_mbuf.mptr
  58 #define ui_x1           ui_i.ih_x1
  59 #define ui_pr           ui_i.ih_pr
  60 #define ui_len          ui_i.ih_len
  61 #define ui_src          ui_i.ih_src
  62 #define ui_dst          ui_i.ih_dst
  63 #define ui_sport        ui_u.uh_sport
  64 #define ui_dport        ui_u.uh_dport
  65 #define ui_ulen         ui_u.uh_ulen
  66 #define ui_sum          ui_u.uh_sum
  67
  68 /*
  69  * Names for UDP sysctl objects
  70  */
  71 #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
  72 #define UDPCTL_MAXID            2
  73
  74 struct mbuf;
  75
  76 void udp_init(Slirp *);
  77 void udp_input(register struct mbuf *, int);
  78 int udp_output(struct socket *, struct mbuf *, struct sockaddr_in *);
  79 int udp_attach(struct socket *);
  80 void udp_detach(struct socket *);
  81 struct socket * udp_listen(Slirp *, u_int32_t, u_int, u_int32_t, u_int,
  82                            int);
  83 int udp_output2(struct socket *so, struct mbuf *m,
  84                 struct sockaddr_in *saddr, struct sockaddr_in *daddr,
  85                 int iptos);
  86 #endif