in.h revision 14195
1294332Sdes/* 2276707Sdes * Copyright (c) 1982, 1986, 1990, 1993 3276707Sdes * The Regents of the University of California. All rights reserved. 4276707Sdes * 5276707Sdes * Redistribution and use in source and binary forms, with or without 6276707Sdes * modification, are permitted provided that the following conditions 7276707Sdes * are met: 8276707Sdes * 1. Redistributions of source code must retain the above copyright 9276707Sdes * notice, this list of conditions and the following disclaimer. 10276707Sdes * 2. Redistributions in binary form must reproduce the above copyright 11276707Sdes * notice, this list of conditions and the following disclaimer in the 12276707Sdes * documentation and/or other materials provided with the distribution. 13276707Sdes * 3. All advertising materials mentioning features or use of this software 14276707Sdes * must display the following acknowledgement: 15276707Sdes * This product includes software developed by the University of 16276707Sdes * California, Berkeley and its contributors. 17276707Sdes * 4. Neither the name of the University nor the names of its contributors 18276707Sdes * may be used to endorse or promote products derived from this software 19276707Sdes * without specific prior written permission. 20276707Sdes * 21276707Sdes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22276707Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23294332Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24276707Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25276707Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26276707Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27276707Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28276707Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29276707Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30276707Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31276707Sdes * SUCH DAMAGE. 32276707Sdes * 33294332Sdes * @(#)in.h 8.3 (Berkeley) 1/3/94 34294332Sdes * $Id: in.h,v 1.14 1996/01/19 08:00:57 peter Exp $ 35276707Sdes */ 36276707Sdes 37294332Sdes#ifndef _NETINET_IN_H_ 38276707Sdes#define _NETINET_IN_H_ 39276707Sdes 40276707Sdes/* 41276707Sdes * Constants and structures defined by the internet system, 42276707Sdes * Per RFC 790, September 1981, and numerous additions. 43276707Sdes */ 44276707Sdes 45276707Sdes/* 46276707Sdes * Protocols 47276707Sdes */ 48276707Sdes#define IPPROTO_IP 0 /* dummy for IP */ 49276707Sdes#define IPPROTO_ICMP 1 /* control message protocol */ 50276707Sdes#define IPPROTO_IGMP 2 /* group mgmt protocol */ 51276707Sdes#define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 52276707Sdes#define IPPROTO_IPIP 4 /* IP encapsulation in IP */ 53276707Sdes#define IPPROTO_TCP 6 /* tcp */ 54276707Sdes#define IPPROTO_EGP 8 /* exterior gateway protocol */ 55276707Sdes#define IPPROTO_PUP 12 /* pup */ 56276707Sdes#define IPPROTO_UDP 17 /* user datagram protocol */ 57276707Sdes#define IPPROTO_IDP 22 /* xns idp */ 58276707Sdes#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 59276707Sdes#define IPPROTO_RSVP 46 /* resource reservation */ 60276707Sdes#define IPPROTO_EON 80 /* ISO cnlp */ 61276707Sdes#define IPPROTO_ENCAP 98 /* encapsulation header */ 62276707Sdes 63276707Sdes#define IPPROTO_RAW 255 /* raw IP packet */ 64276707Sdes#define IPPROTO_MAX 256 65276707Sdes 66276707Sdes 67276707Sdes/* 68276707Sdes * Local port number conventions: 69276707Sdes * 70276707Sdes * When a user does a bind(2) or connect(2) with a port number of zero, 71276707Sdes * a non-conflicting local port address is chosen. 72276707Sdes * The default range is IPPORT_RESERVED through 73276707Sdes * IPPORT_USERRESERVED, although that is settable by sysctl. 74276707Sdes * 75276707Sdes * A user may set the IPPROTO_IP option IP_PORTRANGE to change this 76276707Sdes * default assignment range. 77276707Sdes * 78276707Sdes * The value IP_PORTRANGE_DEFAULT causes the default behavior. 79276707Sdes * 80276707Sdes * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers 81276707Sdes * into the "high" range. These are reserved for client outbound connections 82276707Sdes * which do not want to be filtered by any firewalls. 83276707Sdes * 84276707Sdes * The value IP_PORTRANGE_LOW changes the range to the "low" are 85276707Sdes * that is (by convention) restricted to privileged processes. This 86276707Sdes * convention is based on "vouchsafe" principles only. It is only secure 87276707Sdes * if you trust the remote host to restrict these ports. 88276707Sdes * 89276707Sdes * The default range of ports and the high range can be changed by 90276707Sdes * sysctl(3). (net.inet.ip.port{hi}{first,last}_auto) 91276707Sdes * 92276707Sdes * Changing those values has bad security implications if you are 93276707Sdes * using a a stateless firewall that is allowing packets outside of that 94276707Sdes * range in order to allow transparent outgoing connections. 95276707Sdes * 96276707Sdes * Such a firewall configuration will generally depend on the use of these 97276707Sdes * default values. If you change them, you may find your Security 98276707Sdes * Administrator looking for you with a heavy object. 99276707Sdes */ 100276707Sdes 101276707Sdes/* 102294332Sdes * Ports < IPPORT_RESERVED are reserved for 103294332Sdes * privileged processes (e.g. root). (IP_PORTRANGE_LOW) 104276707Sdes * Ports > IPPORT_USERRESERVED are reserved 105294332Sdes * for servers, not necessarily privileged. (IP_PORTRANGE_DEFAULT) 106294332Sdes */ 107276707Sdes#define IPPORT_RESERVED 1024 108276707Sdes#define IPPORT_USERRESERVED 5000 109276707Sdes 110294332Sdes/* 111276707Sdes * Default local port range to use by setting IP_PORTRANGE_HIGH 112276707Sdes */ 113294332Sdes#define IPPORT_HIFIRSTAUTO 40000 114276707Sdes#define IPPORT_HILASTAUTO 44999 115294332Sdes 116276707Sdes/* 117276707Sdes * Internet address (a structure for historical reasons) 118276707Sdes */ 119276707Sdesstruct in_addr { 120294332Sdes u_long s_addr; 121276707Sdes}; 122294332Sdes 123276707Sdes/* 124276707Sdes * Definitions of bits in internet address integers. 125294332Sdes * On subnets, the decomposition of addresses to host and net parts 126276707Sdes * is done according to subnet mask, not the masks here. 127294332Sdes */ 128276707Sdes#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 129276707Sdes#define IN_CLASSA_NET 0xff000000 130276707Sdes#define IN_CLASSA_NSHIFT 24 131276707Sdes#define IN_CLASSA_HOST 0x00ffffff 132294332Sdes#define IN_CLASSA_MAX 128 133276707Sdes 134294332Sdes#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 135276707Sdes#define IN_CLASSB_NET 0xffff0000 136276707Sdes#define IN_CLASSB_NSHIFT 16 137294332Sdes#define IN_CLASSB_HOST 0x0000ffff 138276707Sdes#define IN_CLASSB_MAX 65536 139294332Sdes 140276707Sdes#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 141276707Sdes#define IN_CLASSC_NET 0xffffff00 142294332Sdes#define IN_CLASSC_NSHIFT 8 143276707Sdes#define IN_CLASSC_HOST 0x000000ff 144276707Sdes 145294332Sdes#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 146276707Sdes#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 147276707Sdes#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 148276707Sdes#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 149276707Sdes#define IN_MULTICAST(i) IN_CLASSD(i) 150294332Sdes 151276707Sdes#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 152294332Sdes#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 153276707Sdes 154276707Sdes#define INADDR_ANY (u_long)0x00000000 155294332Sdes#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 156276707Sdes#ifndef KERNEL 157294332Sdes#define INADDR_NONE 0xffffffff /* -1 return */ 158294332Sdes#endif 159294332Sdes 160294332Sdes#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 161294332Sdes#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 162276707Sdes#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 163276707Sdes 164276707Sdes#define IN_LOOPBACKNET 127 /* official! */ 165276707Sdes 166276707Sdes/* 167276707Sdes * Socket address, internet style. 168276707Sdes */ 169276707Sdesstruct sockaddr_in { 170276707Sdes u_char sin_len; 171276707Sdes u_char sin_family; 172276707Sdes u_short sin_port; 173276707Sdes struct in_addr sin_addr; 174276707Sdes char sin_zero[8]; 175276707Sdes}; 176276707Sdes 177276707Sdes/* 178276707Sdes * Structure used to describe IP options. 179276707Sdes * Used to store options internally, to pass them to a process, 180276707Sdes * or to restore options retrieved earlier. 181276707Sdes * The ip_dst is used for the first-hop gateway when using a source route 182276707Sdes * (this gets put into the header proper). 183294332Sdes */ 184294332Sdesstruct ip_opts { 185294332Sdes struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 186294332Sdes char ip_opts[40]; /* actually variable in size */ 187294332Sdes}; 188294332Sdes 189294332Sdes/* 190294332Sdes * Options for use with [gs]etsockopt at the IP level. 191294332Sdes * First word of comment is data type; bool is stored in int. 192294332Sdes */ 193294332Sdes#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 194294332Sdes#define IP_HDRINCL 2 /* int; header is included with data */ 195294332Sdes#define IP_TOS 3 /* int; IP type of service and preced. */ 196294332Sdes#define IP_TTL 4 /* int; IP time to live */ 197294332Sdes#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 198294332Sdes#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 199294332Sdes#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 200294332Sdes#define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 201294332Sdes#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 202294332Sdes#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 203294332Sdes#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 204294332Sdes#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 205294332Sdes#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 206294332Sdes#define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */ 207294332Sdes#define IP_RSVP_ON 15 /* enable RSVP in kernel */ 208294332Sdes#define IP_RSVP_OFF 16 /* disable RSVP in kernel */ 209294332Sdes#define IP_RSVP_VIF_ON 17 /* set RSVP per-vif socket */ 210294332Sdes#define IP_RSVP_VIF_OFF 18 /* unset RSVP per-vif socket */ 211294332Sdes#define IP_PORTRANGE 19 /* int; range to choose for unspec port */ 212294332Sdes 213294332Sdes/* 214294332Sdes * Defaults and limits for options 215294332Sdes */ 216276707Sdes#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 217276707Sdes#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 218276707Sdes#define IP_MAX_MEMBERSHIPS 20 /* per socket */ 219276707Sdes 220276707Sdes/* 221276707Sdes * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 222276707Sdes */ 223276707Sdesstruct ip_mreq { 224276707Sdes struct in_addr imr_multiaddr; /* IP multicast address of group */ 225276707Sdes struct in_addr imr_interface; /* local IP address of interface */ 226276707Sdes}; 227276707Sdes 228276707Sdes/* 229276707Sdes * Argument for IP_PORTRANGE: 230276707Sdes * - which range to search when port is unspecified at bind() or connect() 231276707Sdes */ 232276707Sdes#define IP_PORTRANGE_DEFAULT 0 /* default range */ 233276707Sdes#define IP_PORTRANGE_HIGH 1 /* "high" - request firewall bypass */ 234276707Sdes#define IP_PORTRANGE_LOW 2 /* "low" - vouchsafe security */ 235294332Sdes 236294332Sdes/* 237294332Sdes * Definitions for inet sysctl operations. 238294332Sdes * 239294332Sdes * Third level is protocol number. 240294332Sdes * Fourth level is desired variable within that protocol. 241276707Sdes */ 242276707Sdes#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 243276707Sdes 244276707Sdes#define CTL_IPPROTO_NAMES { \ 245276707Sdes { "ip", CTLTYPE_NODE }, \ 246276707Sdes { "icmp", CTLTYPE_NODE }, \ 247276707Sdes { "igmp", CTLTYPE_NODE }, \ 248294332Sdes { "ggp", CTLTYPE_NODE }, \ 249294332Sdes { 0, 0 }, \ 250294332Sdes { 0, 0 }, \ 251294332Sdes { "tcp", CTLTYPE_NODE }, \ 252276707Sdes { 0, 0 }, \ 253276707Sdes { "egp", CTLTYPE_NODE }, \ 254276707Sdes { 0, 0 }, \ 255276707Sdes { 0, 0 }, \ 256276707Sdes { 0, 0 }, \ 257276707Sdes { "pup", CTLTYPE_NODE }, \ 258276707Sdes { 0, 0 }, \ 259276707Sdes { 0, 0 }, \ 260276707Sdes { 0, 0 }, \ 261276707Sdes { 0, 0 }, \ 262276707Sdes { "udp", CTLTYPE_NODE }, \ 263276707Sdes { 0, 0 }, \ 264276707Sdes { 0, 0 }, \ 265276707Sdes { 0, 0 }, \ 266276707Sdes { 0, 0 }, \ 267276707Sdes { "idp", CTLTYPE_NODE }, \ 268276707Sdes} 269276707Sdes 270276707Sdes/* 271276707Sdes * Names for IP sysctl objects 272276707Sdes */ 273276707Sdes#define IPCTL_FORWARDING 1 /* act as router */ 274276707Sdes#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 275276707Sdes#define IPCTL_DEFTTL 3 /* default TTL */ 276276707Sdes#ifdef notyet 277276707Sdes#define IPCTL_DEFMTU 4 /* default MTU */ 278276707Sdes#endif 279276707Sdes#define IPCTL_RTEXPIRE 5 /* cloned route expiration time */ 280276707Sdes#define IPCTL_RTMINEXPIRE 6 /* min value for expiration time */ 281276707Sdes#define IPCTL_RTMAXCACHE 7 /* trigger level for dynamic expire */ 282276707Sdes#define IPCTL_SOURCEROUTE 8 /* may perform source routes */ 283276707Sdes#define IPCTL_DIRECTEDBROADCAST 9 /* may re-broadcast received packets */ 284276707Sdes#define IPCTL_INTRQMAXLEN 10 /* max length of netisr queue */ 285276707Sdes#define IPCTL_INTRQDROPS 11 /* number of netisr q drops */ 286276707Sdes#define IPCTL_MAXID 12 287276707Sdes 288276707Sdes#define IPCTL_NAMES { \ 289276707Sdes { 0, 0 }, \ 290276707Sdes { "forwarding", CTLTYPE_INT }, \ 291276707Sdes { "redirect", CTLTYPE_INT }, \ 292276707Sdes { "ttl", CTLTYPE_INT }, \ 293276707Sdes { "mtu", CTLTYPE_INT }, \ 294276707Sdes { "rtexpire", CTLTYPE_INT }, \ 295276707Sdes { "rtminexpire", CTLTYPE_INT }, \ 296276707Sdes { "rtmaxcache", CTLTYPE_INT }, \ 297276707Sdes { "sourceroute", CTLTYPE_INT }, \ 298276707Sdes { "directed-broadcast", CTLTYPE_INT }, \ 299276707Sdes { "intr-queue-maxlen", CTLTYPE_INT }, \ 300276707Sdes { "intr-queue-drops", CTLTYPE_INT }, \ 301276707Sdes} 302276707Sdes 303276707Sdes 304276707Sdes#ifdef KERNEL 305276707Sdesstruct ifnet; struct mbuf; /* forward declarations for Standard C */ 306276707Sdes 307276707Sdesint in_broadcast __P((struct in_addr, struct ifnet *)); 308276707Sdesint in_canforward __P((struct in_addr)); 309276707Sdesint in_cksum __P((struct mbuf *, int)); 310276707Sdesint in_localaddr __P((struct in_addr)); 311276707Sdeschar *inet_ntoa __P((struct in_addr)); /* in libkern */ 312276707Sdes#endif 313276707Sdes 314276707Sdes#endif 315276707Sdes 316276707Sdes