1 | /* $Id: udp.h 98103 2023-01-17 14:15:46Z 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) 2006-2023 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * SPDX-License-Identifier: GPL-3.0-only
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26 | */
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27 |
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28 |
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29 | /*
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30 | * This code is based on:
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31 | *
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32 | * Copyright (c) 1982, 1986, 1993
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33 | * The Regents of the University of California. All rights reserved.
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34 | *
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35 | * Redistribution and use in source and binary forms, with or without
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36 | * modification, are permitted provided that the following conditions
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37 | * are met:
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38 | * 1. Redistributions of source code must retain the above copyright
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39 | * notice, this list of conditions and the following disclaimer.
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40 | * 2. Redistributions in binary form must reproduce the above copyright
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41 | * notice, this list of conditions and the following disclaimer in the
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42 | * documentation and/or other materials provided with the distribution.
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43 | * 3. Neither the name of the University nor the names of its contributors
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44 | * may be used to endorse or promote products derived from this software
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45 | * without specific prior written permission.
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46 | *
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47 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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48 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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49 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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50 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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51 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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52 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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53 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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54 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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55 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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56 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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57 | * SUCH DAMAGE.
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58 | *
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59 | * @(#)udp.h 8.1 (Berkeley) 6/10/93
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60 | * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
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61 | */
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62 |
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63 | #ifndef _UDP_H_
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64 | #define _UDP_H_
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65 |
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66 | #define UDP_TTL 0x60
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67 | #define UDP_UDPDATALEN 16192
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68 |
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69 | extern struct socket *udp_last_so;
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70 |
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71 | /*
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72 | * Udp protocol header.
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73 | * Per RFC 768, September, 1981.
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74 | */
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75 | struct udphdr
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76 | {
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77 | uint16_t uh_sport; /* source port */
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78 | uint16_t uh_dport; /* destination port */
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79 | int16_t uh_ulen; /* udp length */
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80 | uint16_t uh_sum; /* udp checksum */
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81 | };
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82 | AssertCompileSize(struct udphdr, 8);
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83 |
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84 | /*
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85 | * UDP kernel structures and variables.
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86 | */
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87 | struct udpiphdr
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88 | {
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89 | struct ipovly ui_i; /* overlaid ip structure */
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90 | struct udphdr ui_u; /* udp header */
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91 | };
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92 | AssertCompileSize(struct udpiphdr, 28);
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93 | #define ui_next ui_i.ih_next
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94 | #define ui_prev ui_i.ih_prev
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95 | #define ui_x1 ui_i.ih_x1
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96 | #define ui_pr ui_i.ih_pr
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97 | #define ui_len ui_i.ih_len
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98 | #define ui_src ui_i.ih_src
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99 | #define ui_dst ui_i.ih_dst
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100 | #define ui_sport ui_u.uh_sport
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101 | #define ui_dport ui_u.uh_dport
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102 | #define ui_ulen ui_u.uh_ulen
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103 | #define ui_sum ui_u.uh_sum
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104 |
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105 | struct udpstat_t
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106 | {
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107 | /* input statistics: */
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108 | u_long udps_ipackets; /* total input packets */
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109 | u_long udps_hdrops; /* packet shorter than header */
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110 | u_long udps_badsum; /* checksum error */
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111 | u_long udps_badlen; /* data length larger than packet */
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112 | u_long udps_noport; /* no socket on port */
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113 | u_long udps_noportbcast; /* of above, arrived as broadcast */
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114 | u_long udps_fullsock; /* not delivered, input socket full */
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115 | u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
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116 | /* output statistics: */
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117 | u_long udps_opackets; /* total output packets */
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118 | };
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119 |
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120 | /*
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121 | * Names for UDP sysctl objects
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122 | */
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123 | #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
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124 | #define UDPCTL_MAXID 2
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125 |
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126 | extern struct udpstat udpstat;
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127 | extern struct socket udb;
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128 | struct mbuf;
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129 |
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130 | void udp_init (PNATState);
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131 | void udp_input (PNATState, register struct mbuf *, int);
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132 | int udp_output (PNATState, struct socket *, struct mbuf *, struct sockaddr_in *);
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133 | int udp_attach (PNATState, struct socket *);
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134 | void udp_detach (PNATState, struct socket *);
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135 | u_int8_t udp_tos (struct socket *);
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136 | void udp_emu (PNATState, struct socket *, struct mbuf *);
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137 | struct socket * udp_listen (PNATState, u_int32_t, u_int, u_int32_t, u_int, int);
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138 | int udp_output2(PNATState pData, struct socket *so, struct mbuf *m,
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139 | struct sockaddr_in *saddr, struct sockaddr_in *daddr,
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140 | int iptos);
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141 |
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142 | #endif
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