in.h revision 2169
1/* 2 * Copyright (c) 1982, 1986, 1990, 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)in.h 8.3 (Berkeley) 1/3/94 34 * $Id: in.h,v 1.2 1994/08/02 07:48:14 davidg Exp $ 35 */ 36 37#ifndef _NETINET_IN_H_ 38#define _NETINET_IN_H_ 39 40/* 41 * Constants and structures defined by the internet system, 42 * Per RFC 790, September 1981, and numerous additions. 43 */ 44 45/* 46 * Protocols 47 */ 48#define IPPROTO_IP 0 /* dummy for IP */ 49#define IPPROTO_ICMP 1 /* control message protocol */ 50#define IPPROTO_IGMP 2 /* group mgmt protocol */ 51#define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 52#define IPPROTO_TCP 6 /* tcp */ 53#define IPPROTO_EGP 8 /* exterior gateway protocol */ 54#define IPPROTO_PUP 12 /* pup */ 55#define IPPROTO_UDP 17 /* user datagram protocol */ 56#define IPPROTO_IDP 22 /* xns idp */ 57#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 58#define IPPROTO_EON 80 /* ISO cnlp */ 59#define IPPROTO_ENCAP 98 /* encapsulation header */ 60 61#define IPPROTO_RAW 255 /* raw IP packet */ 62#define IPPROTO_MAX 256 63 64 65/* 66 * Local port number conventions: 67 * Ports < IPPORT_RESERVED are reserved for 68 * privileged processes (e.g. root). 69 * Ports > IPPORT_USERRESERVED are reserved 70 * for servers, not necessarily privileged. 71 */ 72#define IPPORT_RESERVED 1024 73#define IPPORT_USERRESERVED 5000 74 75/* 76 * Internet address (a structure for historical reasons) 77 */ 78struct in_addr { 79 u_long s_addr; 80}; 81 82/* 83 * Definitions of bits in internet address integers. 84 * On subnets, the decomposition of addresses to host and net parts 85 * is done according to subnet mask, not the masks here. 86 */ 87#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 88#define IN_CLASSA_NET 0xff000000 89#define IN_CLASSA_NSHIFT 24 90#define IN_CLASSA_HOST 0x00ffffff 91#define IN_CLASSA_MAX 128 92 93#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 94#define IN_CLASSB_NET 0xffff0000 95#define IN_CLASSB_NSHIFT 16 96#define IN_CLASSB_HOST 0x0000ffff 97#define IN_CLASSB_MAX 65536 98 99#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 100#define IN_CLASSC_NET 0xffffff00 101#define IN_CLASSC_NSHIFT 8 102#define IN_CLASSC_HOST 0x000000ff 103 104#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 105#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 106#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 107#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 108#define IN_MULTICAST(i) IN_CLASSD(i) 109 110#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 111#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 112 113#define INADDR_ANY (u_long)0x00000000 114#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 115#ifndef KERNEL 116#define INADDR_NONE 0xffffffff /* -1 return */ 117#endif 118 119#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 120#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 121#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 122 123#define IN_LOOPBACKNET 127 /* official! */ 124 125/* 126 * Socket address, internet style. 127 */ 128struct sockaddr_in { 129 u_char sin_len; 130 u_char sin_family; 131 u_short sin_port; 132 struct in_addr sin_addr; 133 char sin_zero[8]; 134}; 135 136/* 137 * Structure used to describe IP options. 138 * Used to store options internally, to pass them to a process, 139 * or to restore options retrieved earlier. 140 * The ip_dst is used for the first-hop gateway when using a source route 141 * (this gets put into the header proper). 142 */ 143struct ip_opts { 144 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 145 char ip_opts[40]; /* actually variable in size */ 146}; 147 148/* 149 * Options for use with [gs]etsockopt at the IP level. 150 * First word of comment is data type; bool is stored in int. 151 */ 152#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 153#define IP_HDRINCL 2 /* int; header is included with data */ 154#define IP_TOS 3 /* int; IP type of service and preced. */ 155#define IP_TTL 4 /* int; IP time to live */ 156#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 157#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 158#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 159#define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 160#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 161#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 162#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 163#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 164#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 165 166/* 167 * Defaults and limits for options 168 */ 169#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 170#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 171#define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 172 173/* 174 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 175 */ 176struct ip_mreq { 177 struct in_addr imr_multiaddr; /* IP multicast address of group */ 178 struct in_addr imr_interface; /* local IP address of interface */ 179}; 180 181/* 182 * Definitions for inet sysctl operations. 183 * 184 * Third level is protocol number. 185 * Fourth level is desired variable within that protocol. 186 */ 187#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 188 189#define CTL_IPPROTO_NAMES { \ 190 { "ip", CTLTYPE_NODE }, \ 191 { "icmp", CTLTYPE_NODE }, \ 192 { "igmp", CTLTYPE_NODE }, \ 193 { "ggp", CTLTYPE_NODE }, \ 194 { 0, 0 }, \ 195 { 0, 0 }, \ 196 { "tcp", CTLTYPE_NODE }, \ 197 { 0, 0 }, \ 198 { "egp", CTLTYPE_NODE }, \ 199 { 0, 0 }, \ 200 { 0, 0 }, \ 201 { 0, 0 }, \ 202 { "pup", CTLTYPE_NODE }, \ 203 { 0, 0 }, \ 204 { 0, 0 }, \ 205 { 0, 0 }, \ 206 { 0, 0 }, \ 207 { "udp", CTLTYPE_NODE }, \ 208 { 0, 0 }, \ 209 { 0, 0 }, \ 210 { 0, 0 }, \ 211 { 0, 0 }, \ 212 { "idp", CTLTYPE_NODE }, \ 213} 214 215/* 216 * Names for IP sysctl objects 217 */ 218#define IPCTL_FORWARDING 1 /* act as router */ 219#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 220#define IPCTL_DEFTTL 3 /* default TTL */ 221#ifdef notyet 222#define IPCTL_DEFMTU 4 /* default MTU */ 223#endif 224#define IPCTL_MAXID 5 225 226#define IPCTL_NAMES { \ 227 { 0, 0 }, \ 228 { "forwarding", CTLTYPE_INT }, \ 229 { "redirect", CTLTYPE_INT }, \ 230 { "ttl", CTLTYPE_INT }, \ 231 { "mtu", CTLTYPE_INT }, \ 232} 233 234 235#ifdef KERNEL 236int in_broadcast __P((struct in_addr, struct ifnet *)); 237int in_canforward __P((struct in_addr)); 238int in_cksum __P((struct mbuf *, int)); 239int in_localaddr __P((struct in_addr)); 240u_long in_netof __P((struct in_addr)); 241void in_socktrim __P((struct sockaddr_in *)); 242#endif 243 244#endif 245