in.h revision 13491
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 1.13 1995/11/14 20:33:57 phk 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_IPIP 4 /* IP encapsulation in IP */ 53#define IPPROTO_TCP 6 /* tcp */ 54#define IPPROTO_EGP 8 /* exterior gateway protocol */ 55#define IPPROTO_PUP 12 /* pup */ 56#define IPPROTO_UDP 17 /* user datagram protocol */ 57#define IPPROTO_IDP 22 /* xns idp */ 58#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 59#define IPPROTO_RSVP 46 /* resource reservation */ 60#define IPPROTO_EON 80 /* ISO cnlp */ 61#define IPPROTO_ENCAP 98 /* encapsulation header */ 62 63#define IPPROTO_RAW 255 /* raw IP packet */ 64#define IPPROTO_MAX 256 65 66 67/* 68 * Local port number conventions: 69 * Ports < IPPORT_RESERVED are reserved for 70 * privileged processes (e.g. root). 71 * Ports > IPPORT_USERRESERVED are reserved 72 * for servers, not necessarily privileged. 73 */ 74#define IPPORT_RESERVED 1024 75#define IPPORT_USERRESERVED 5000 76 77/* 78 * Range of ports for automatic assignment to local addresses that 79 * have not explicitly specified an address. 80 * 81 * These can be overridden at kernel config time, and are used to init 82 * sysctl variables. The sysctl variables can be changed at runtime. 83 */ 84#ifndef IPPORT_FIRSTAUTO 85#define IPPORT_FIRSTAUTO 20000 86#endif 87#ifndef IPPORT_LASTAUTO 88#define IPPORT_LASTAUTO 30000 89#endif 90 91/* 92 * Internet address (a structure for historical reasons) 93 */ 94struct in_addr { 95 u_long s_addr; 96}; 97 98/* 99 * Definitions of bits in internet address integers. 100 * On subnets, the decomposition of addresses to host and net parts 101 * is done according to subnet mask, not the masks here. 102 */ 103#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 104#define IN_CLASSA_NET 0xff000000 105#define IN_CLASSA_NSHIFT 24 106#define IN_CLASSA_HOST 0x00ffffff 107#define IN_CLASSA_MAX 128 108 109#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 110#define IN_CLASSB_NET 0xffff0000 111#define IN_CLASSB_NSHIFT 16 112#define IN_CLASSB_HOST 0x0000ffff 113#define IN_CLASSB_MAX 65536 114 115#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 116#define IN_CLASSC_NET 0xffffff00 117#define IN_CLASSC_NSHIFT 8 118#define IN_CLASSC_HOST 0x000000ff 119 120#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 121#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 122#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 123#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 124#define IN_MULTICAST(i) IN_CLASSD(i) 125 126#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 127#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 128 129#define INADDR_ANY (u_long)0x00000000 130#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 131#ifndef KERNEL 132#define INADDR_NONE 0xffffffff /* -1 return */ 133#endif 134 135#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 136#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 137#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 138 139#define IN_LOOPBACKNET 127 /* official! */ 140 141/* 142 * Socket address, internet style. 143 */ 144struct sockaddr_in { 145 u_char sin_len; 146 u_char sin_family; 147 u_short sin_port; 148 struct in_addr sin_addr; 149 char sin_zero[8]; 150}; 151 152/* 153 * Structure used to describe IP options. 154 * Used to store options internally, to pass them to a process, 155 * or to restore options retrieved earlier. 156 * The ip_dst is used for the first-hop gateway when using a source route 157 * (this gets put into the header proper). 158 */ 159struct ip_opts { 160 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 161 char ip_opts[40]; /* actually variable in size */ 162}; 163 164/* 165 * Options for use with [gs]etsockopt at the IP level. 166 * First word of comment is data type; bool is stored in int. 167 */ 168#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 169#define IP_HDRINCL 2 /* int; header is included with data */ 170#define IP_TOS 3 /* int; IP type of service and preced. */ 171#define IP_TTL 4 /* int; IP time to live */ 172#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 173#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 174#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 175#define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 176#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 177#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 178#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 179#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 180#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 181#define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */ 182#define IP_RSVP_ON 15 /* enable RSVP in kernel */ 183#define IP_RSVP_OFF 16 /* disable RSVP in kernel */ 184#define IP_RSVP_VIF_ON 17 /* set RSVP per-vif socket */ 185#define IP_RSVP_VIF_OFF 18 /* unset RSVP per-vif socket */ 186 187/* 188 * Defaults and limits for options 189 */ 190#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 191#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 192#define IP_MAX_MEMBERSHIPS 20 /* per socket */ 193 194/* 195 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 196 */ 197struct ip_mreq { 198 struct in_addr imr_multiaddr; /* IP multicast address of group */ 199 struct in_addr imr_interface; /* local IP address of interface */ 200}; 201 202/* 203 * Definitions for inet sysctl operations. 204 * 205 * Third level is protocol number. 206 * Fourth level is desired variable within that protocol. 207 */ 208#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 209 210#define CTL_IPPROTO_NAMES { \ 211 { "ip", CTLTYPE_NODE }, \ 212 { "icmp", CTLTYPE_NODE }, \ 213 { "igmp", CTLTYPE_NODE }, \ 214 { "ggp", CTLTYPE_NODE }, \ 215 { 0, 0 }, \ 216 { 0, 0 }, \ 217 { "tcp", CTLTYPE_NODE }, \ 218 { 0, 0 }, \ 219 { "egp", CTLTYPE_NODE }, \ 220 { 0, 0 }, \ 221 { 0, 0 }, \ 222 { 0, 0 }, \ 223 { "pup", CTLTYPE_NODE }, \ 224 { 0, 0 }, \ 225 { 0, 0 }, \ 226 { 0, 0 }, \ 227 { 0, 0 }, \ 228 { "udp", CTLTYPE_NODE }, \ 229 { 0, 0 }, \ 230 { 0, 0 }, \ 231 { 0, 0 }, \ 232 { 0, 0 }, \ 233 { "idp", CTLTYPE_NODE }, \ 234} 235 236/* 237 * Names for IP sysctl objects 238 */ 239#define IPCTL_FORWARDING 1 /* act as router */ 240#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 241#define IPCTL_DEFTTL 3 /* default TTL */ 242#ifdef notyet 243#define IPCTL_DEFMTU 4 /* default MTU */ 244#endif 245#define IPCTL_RTEXPIRE 5 /* cloned route expiration time */ 246#define IPCTL_RTMINEXPIRE 6 /* min value for expiration time */ 247#define IPCTL_RTMAXCACHE 7 /* trigger level for dynamic expire */ 248#define IPCTL_SOURCEROUTE 8 /* may perform source routes */ 249#define IPCTL_DIRECTEDBROADCAST 9 /* may re-broadcast received packets */ 250#define IPCTL_INTRQMAXLEN 10 /* max length of netisr queue */ 251#define IPCTL_INTRQDROPS 11 /* number of netisr q drops */ 252#define IPCTL_MAXID 12 253 254#define IPCTL_NAMES { \ 255 { 0, 0 }, \ 256 { "forwarding", CTLTYPE_INT }, \ 257 { "redirect", CTLTYPE_INT }, \ 258 { "ttl", CTLTYPE_INT }, \ 259 { "mtu", CTLTYPE_INT }, \ 260 { "rtexpire", CTLTYPE_INT }, \ 261 { "rtminexpire", CTLTYPE_INT }, \ 262 { "rtmaxcache", CTLTYPE_INT }, \ 263 { "sourceroute", CTLTYPE_INT }, \ 264 { "directed-broadcast", CTLTYPE_INT }, \ 265 { "intr-queue-maxlen", CTLTYPE_INT }, \ 266 { "intr-queue-drops", CTLTYPE_INT }, \ 267} 268 269 270#ifdef KERNEL 271struct ifnet; struct mbuf; /* forward declarations for Standard C */ 272 273int in_broadcast __P((struct in_addr, struct ifnet *)); 274int in_canforward __P((struct in_addr)); 275int in_cksum __P((struct mbuf *, int)); 276int in_localaddr __P((struct in_addr)); 277char *inet_ntoa __P((struct in_addr)); /* in libkern */ 278#endif 279 280#endif 281 282