slirp/src/udp.h

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2 /*
   3  * Copyright (c) 1982, 1986, 1993
   4  *      The Regents of the University of California.  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  * 3. 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.h       8.1 (Berkeley) 6/10/93
  31  * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
  32  */
  33
  34 #ifndef UDP_H
  35 #define UDP_H
  36
  37 #define UDP_TTL 0x60
  38 #define UDP_UDPDATALEN 16192
  39
  40 /*
  41  * Udp protocol header.
  42  * Per RFC 768, September, 1981.
  43  */
  44 struct udphdr {
  45     uint16_t uh_sport;          /* source port */
  46     uint16_t uh_dport;          /* destination port */
  47     int16_t  uh_ulen;           /* udp length */
  48     uint16_t uh_sum;            /* udp checksum */
  49 };
  50
  51 /*
  52  * UDP kernel structures and variables.
  53  */
  54 struct udpiphdr {
  55                 struct  ipovly ui_i;            /* overlaid ip structure */
  56                 struct  udphdr ui_u;            /* udp header */
  57 };
  58 #define ui_mbuf         ui_i.ih_mbuf.mptr
  59 #define ui_x1           ui_i.ih_x1
  60 #define ui_pr           ui_i.ih_pr
  61 #define ui_len          ui_i.ih_len
  62 #define ui_src          ui_i.ih_src
  63 #define ui_dst          ui_i.ih_dst
  64 #define ui_sport        ui_u.uh_sport
  65 #define ui_dport        ui_u.uh_dport
  66 #define ui_ulen         ui_u.uh_ulen
  67 #define ui_sum          ui_u.uh_sum
  68
  69 /*
  70  * Names for UDP sysctl objects
  71  */
  72 #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
  73 #define UDPCTL_MAXID            2
  74
  75 struct mbuf;
  76
  77 void udp_init(Slirp *);
  78 void udp_cleanup(Slirp *);
  79 void udp_input(register struct mbuf *, int);
  80 int udp_attach(struct socket *, unsigned short af);
  81 void udp_detach(struct socket *);
  82 struct socket * udp_listen(Slirp *, uint32_t, unsigned, uint32_t, unsigned,
  83                            int);
  84 int udp_output(struct socket *so, struct mbuf *m,
  85                 struct sockaddr_in *saddr, struct sockaddr_in *daddr,
  86                 int iptos);
  87
  88 void udp6_input(register struct mbuf *);
  89 int udp6_output(struct socket *so, struct mbuf *m,
  90                 struct sockaddr_in6 *saddr, struct sockaddr_in6 *daddr);
  91
  92 #endif