in.h revision 2531
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 1.3 1994/08/21 05:27:27 paul 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_RSVP 46 /* resource reservation */ 59#define IPPROTO_EON 80 /* ISO cnlp */ 60#define IPPROTO_ENCAP 98 /* encapsulation header */ 61 62#define IPPROTO_RAW 255 /* raw IP packet */ 63#define IPPROTO_MAX 256 64 65 66/* 67 * Local port number conventions: 68 * Ports < IPPORT_RESERVED are reserved for 69 * privileged processes (e.g. root). 70 * Ports > IPPORT_USERRESERVED are reserved 71 * for servers, not necessarily privileged. 72 */ 73#define IPPORT_RESERVED 1024 74#define IPPORT_USERRESERVED 5000 75 76/* 77 * Internet address (a structure for historical reasons) 78 */ 79struct in_addr { 80 u_long s_addr; 81}; 82 83/* 84 * Definitions of bits in internet address integers. 85 * On subnets, the decomposition of addresses to host and net parts 86 * is done according to subnet mask, not the masks here. 87 */ 88#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 89#define IN_CLASSA_NET 0xff000000 90#define IN_CLASSA_NSHIFT 24 91#define IN_CLASSA_HOST 0x00ffffff 92#define IN_CLASSA_MAX 128 93 94#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 95#define IN_CLASSB_NET 0xffff0000 96#define IN_CLASSB_NSHIFT 16 97#define IN_CLASSB_HOST 0x0000ffff 98#define IN_CLASSB_MAX 65536 99 100#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 101#define IN_CLASSC_NET 0xffffff00 102#define IN_CLASSC_NSHIFT 8 103#define IN_CLASSC_HOST 0x000000ff 104 105#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 106#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 107#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 108#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 109#define IN_MULTICAST(i) IN_CLASSD(i) 110 111#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 112#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 113 114#define INADDR_ANY (u_long)0x00000000 115#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 116#ifndef KERNEL 117#define INADDR_NONE 0xffffffff /* -1 return */ 118#endif 119 120#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 121#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 122#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 123 124#define IN_LOOPBACKNET 127 /* official! */ 125 126/* 127 * Socket address, internet style. 128 */ 129struct sockaddr_in { 130 u_char sin_len; 131 u_char sin_family; 132 u_short sin_port; 133 struct in_addr sin_addr; 134 char sin_zero[8]; 135}; 136 137/* 138 * Structure used to describe IP options. 139 * Used to store options internally, to pass them to a process, 140 * or to restore options retrieved earlier. 141 * The ip_dst is used for the first-hop gateway when using a source route 142 * (this gets put into the header proper). 143 */ 144struct ip_opts { 145 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 146 char ip_opts[40]; /* actually variable in size */ 147}; 148 149/* 150 * Options for use with [gs]etsockopt at the IP level. 151 * First word of comment is data type; bool is stored in int. 152 */ 153#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 154#define IP_HDRINCL 2 /* int; header is included with data */ 155#define IP_TOS 3 /* int; IP type of service and preced. */ 156#define IP_TTL 4 /* int; IP time to live */ 157#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 158#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 159#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 160#define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 161#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 162#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 163#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 164#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 165#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 166#define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */ 167#define IP_RSVP_ON 15 /* enable RSVP in kernel */ 168#define IP_RSVP_OFF 16 /* disable RSVP in kernel */ 169 170 171/* 172 * Defaults and limits for options 173 */ 174#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 175#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 176#define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 177 178/* 179 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 180 */ 181struct ip_mreq { 182 struct in_addr imr_multiaddr; /* IP multicast address of group */ 183 struct in_addr imr_interface; /* local IP address of interface */ 184}; 185 186/* 187 * Definitions for inet sysctl operations. 188 * 189 * Third level is protocol number. 190 * Fourth level is desired variable within that protocol. 191 */ 192#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 193 194#define CTL_IPPROTO_NAMES { \ 195 { "ip", CTLTYPE_NODE }, \ 196 { "icmp", CTLTYPE_NODE }, \ 197 { "igmp", CTLTYPE_NODE }, \ 198 { "ggp", CTLTYPE_NODE }, \ 199 { 0, 0 }, \ 200 { 0, 0 }, \ 201 { "tcp", CTLTYPE_NODE }, \ 202 { 0, 0 }, \ 203 { "egp", CTLTYPE_NODE }, \ 204 { 0, 0 }, \ 205 { 0, 0 }, \ 206 { 0, 0 }, \ 207 { "pup", CTLTYPE_NODE }, \ 208 { 0, 0 }, \ 209 { 0, 0 }, \ 210 { 0, 0 }, \ 211 { 0, 0 }, \ 212 { "udp", CTLTYPE_NODE }, \ 213 { 0, 0 }, \ 214 { 0, 0 }, \ 215 { 0, 0 }, \ 216 { 0, 0 }, \ 217 { "idp", CTLTYPE_NODE }, \ 218} 219 220/* 221 * Names for IP sysctl objects 222 */ 223#define IPCTL_FORWARDING 1 /* act as router */ 224#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 225#define IPCTL_DEFTTL 3 /* default TTL */ 226#ifdef notyet 227#define IPCTL_DEFMTU 4 /* default MTU */ 228#endif 229#define IPCTL_MAXID 5 230 231#define IPCTL_NAMES { \ 232 { 0, 0 }, \ 233 { "forwarding", CTLTYPE_INT }, \ 234 { "redirect", CTLTYPE_INT }, \ 235 { "ttl", CTLTYPE_INT }, \ 236 { "mtu", CTLTYPE_INT }, \ 237} 238 239 240#ifdef KERNEL 241int in_broadcast __P((struct in_addr, struct ifnet *)); 242int in_canforward __P((struct in_addr)); 243int in_cksum __P((struct mbuf *, int)); 244int in_localaddr __P((struct in_addr)); 245u_long in_netof __P((struct in_addr)); 246void in_socktrim __P((struct sockaddr_in *)); 247#endif 248 249#endif 250