| 1 | /* $Id: udp.h 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * NAT - UDP protocol (declarations/defines).
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*
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| 20 | * This code is based on:
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| 21 | *
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| 22 | * Copyright (c) 1982, 1986, 1993
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| 23 | * The Regents of the University of California. All rights reserved.
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| 24 | *
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| 25 | * Redistribution and use in source and binary forms, with or without
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| 26 | * modification, are permitted provided that the following conditions
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| 27 | * are met:
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| 28 | * 1. Redistributions of source code must retain the above copyright
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| 29 | * notice, this list of conditions and the following disclaimer.
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| 30 | * 2. Redistributions in binary form must reproduce the above copyright
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| 31 | * notice, this list of conditions and the following disclaimer in the
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| 32 | * documentation and/or other materials provided with the distribution.
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| 33 | * 3. All advertising materials mentioning features or use of this software
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| 34 | * must display the following acknowledgement:
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| 35 | * This product includes software developed by the University of
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| 36 | * California, Berkeley and its contributors.
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| 37 | * 4. Neither the name of the University nor the names of its contributors
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| 38 | * may be used to endorse or promote products derived from this software
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| 39 | * without specific prior written permission.
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| 40 | *
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| 41 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 51 | * SUCH DAMAGE.
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| 52 | *
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| 53 | * @(#)udp.h 8.1 (Berkeley) 6/10/93
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| 54 | * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
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| 55 | */
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| 56 |
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| 57 | #ifndef _UDP_H_
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| 58 | #define _UDP_H_
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| 59 |
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| 60 | #define UDP_TTL 0x60
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| 61 | #define UDP_UDPDATALEN 16192
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| 62 |
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| 63 | extern struct socket *udp_last_so;
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| 64 |
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| 65 | /*
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| 66 | * Udp protocol header.
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| 67 | * Per RFC 768, September, 1981.
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| 68 | */
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| 69 | struct udphdr
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| 70 | {
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| 71 | uint16_t uh_sport; /* source port */
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| 72 | uint16_t uh_dport; /* destination port */
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| 73 | int16_t uh_ulen; /* udp length */
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| 74 | uint16_t uh_sum; /* udp checksum */
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| 75 | };
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| 76 | AssertCompileSize(struct udphdr, 8);
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| 77 |
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| 78 | /*
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| 79 | * UDP kernel structures and variables.
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| 80 | */
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| 81 | struct udpiphdr
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| 82 | {
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| 83 | struct ipovly ui_i; /* overlaid ip structure */
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| 84 | struct udphdr ui_u; /* udp header */
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| 85 | };
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| 86 | AssertCompileSize(struct udpiphdr, 28);
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| 87 | #define ui_next ui_i.ih_next
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| 88 | #define ui_prev ui_i.ih_prev
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| 89 | #define ui_x1 ui_i.ih_x1
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| 90 | #define ui_pr ui_i.ih_pr
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| 91 | #define ui_len ui_i.ih_len
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| 92 | #define ui_src ui_i.ih_src
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| 93 | #define ui_dst ui_i.ih_dst
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| 94 | #define ui_sport ui_u.uh_sport
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| 95 | #define ui_dport ui_u.uh_dport
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| 96 | #define ui_ulen ui_u.uh_ulen
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| 97 | #define ui_sum ui_u.uh_sum
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| 98 |
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| 99 | struct udpstat_t
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| 100 | {
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| 101 | /* input statistics: */
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| 102 | u_long udps_ipackets; /* total input packets */
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| 103 | u_long udps_hdrops; /* packet shorter than header */
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| 104 | u_long udps_badsum; /* checksum error */
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| 105 | u_long udps_badlen; /* data length larger than packet */
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| 106 | u_long udps_noport; /* no socket on port */
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| 107 | u_long udps_noportbcast; /* of above, arrived as broadcast */
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| 108 | u_long udps_fullsock; /* not delivered, input socket full */
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| 109 | u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
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| 110 | /* output statistics: */
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| 111 | u_long udps_opackets; /* total output packets */
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| 112 | };
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| 113 |
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| 114 | /*
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| 115 | * Names for UDP sysctl objects
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| 116 | */
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| 117 | #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
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| 118 | #define UDPCTL_MAXID 2
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| 119 |
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| 120 | extern struct udpstat udpstat;
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| 121 | extern struct socket udb;
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| 122 | struct mbuf;
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| 123 |
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| 124 | void udp_init (PNATState);
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| 125 | void udp_input (PNATState, register struct mbuf *, int);
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| 126 | int udp_output (PNATState, struct socket *, struct mbuf *, struct sockaddr_in *);
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| 127 | int udp_attach (PNATState, struct socket *);
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| 128 | void udp_detach (PNATState, struct socket *);
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| 129 | u_int8_t udp_tos (struct socket *);
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| 130 | void udp_emu (PNATState, struct socket *, struct mbuf *);
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| 131 | struct socket * udp_listen (PNATState, u_int32_t, u_int, u_int32_t, u_int, int);
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| 132 | int udp_output2(PNATState pData, struct socket *so, struct mbuf *m,
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| 133 | struct sockaddr_in *saddr, struct sockaddr_in *daddr,
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| 134 | int iptos);
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| 135 |
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| 136 | #endif
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