in.h revision 1541
1117395Skan/* 2117395Skan * Copyright (c) 1982, 1986, 1990, 1993 3169689Skan * The Regents of the University of California. All rights reserved. 4117395Skan * 5117395Skan * Redistribution and use in source and binary forms, with or without 6117395Skan * modification, are permitted provided that the following conditions 7117395Skan * are met: 8117395Skan * 1. Redistributions of source code must retain the above copyright 9117395Skan * notice, this list of conditions and the following disclaimer. 10117395Skan * 2. Redistributions in binary form must reproduce the above copyright 11117395Skan * notice, this list of conditions and the following disclaimer in the 12117395Skan * documentation and/or other materials provided with the distribution. 13117395Skan * 3. All advertising materials mentioning features or use of this software 14117395Skan * must display the following acknowledgement: 15117395Skan * This product includes software developed by the University of 16117395Skan * California, Berkeley and its contributors. 17117395Skan * 4. Neither the name of the University nor the names of its contributors 18117395Skan * may be used to endorse or promote products derived from this software 19169689Skan * without specific prior written permission. 20169689Skan * 21117395Skan * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22117395Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23132718Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24132718Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25117395Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26117395Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27117395Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28117395Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29117395Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30117395Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31117395Skan * SUCH DAMAGE. 32117395Skan * 33169689Skan * @(#)in.h 8.3 (Berkeley) 1/3/94 34169689Skan */ 35169689Skan 36169689Skan/* 37169689Skan * Constants and structures defined by the internet system, 38169689Skan * Per RFC 790, September 1981, and numerous additions. 39169689Skan */ 40132718Skan 41117395Skan/* 42117395Skan * Protocols 43117395Skan */ 44117395Skan#define IPPROTO_IP 0 /* dummy for IP */ 45117395Skan#define IPPROTO_ICMP 1 /* control message protocol */ 46132718Skan#define IPPROTO_IGMP 2 /* group mgmt protocol */ 47117395Skan#define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 48117395Skan#define IPPROTO_TCP 6 /* tcp */ 49117395Skan#define IPPROTO_EGP 8 /* exterior gateway protocol */ 50117395Skan#define IPPROTO_PUP 12 /* pup */ 51117395Skan#define IPPROTO_UDP 17 /* user datagram protocol */ 52117395Skan#define IPPROTO_IDP 22 /* xns idp */ 53117395Skan#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 54117395Skan#define IPPROTO_EON 80 /* ISO cnlp */ 55117395Skan#define IPPROTO_ENCAP 98 /* encapsulation header */ 56117395Skan 57169689Skan#define IPPROTO_RAW 255 /* raw IP packet */ 58117395Skan#define IPPROTO_MAX 256 59117395Skan 60117395Skan 61117395Skan/* 62117395Skan * Local port number conventions: 63117395Skan * Ports < IPPORT_RESERVED are reserved for 64117395Skan * privileged processes (e.g. root). 65117395Skan * Ports > IPPORT_USERRESERVED are reserved 66117395Skan * for servers, not necessarily privileged. 67117395Skan */ 68117395Skan#define IPPORT_RESERVED 1024 69117395Skan#define IPPORT_USERRESERVED 5000 70117395Skan 71117395Skan/* 72117395Skan * Internet address (a structure for historical reasons) 73117395Skan */ 74117395Skanstruct in_addr { 75117395Skan u_long s_addr; 76117395Skan}; 77117395Skan 78117395Skan/* 79117395Skan * Definitions of bits in internet address integers. 80117395Skan * On subnets, the decomposition of addresses to host and net parts 81117395Skan * is done according to subnet mask, not the masks here. 82117395Skan */ 83117395Skan#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 84117395Skan#define IN_CLASSA_NET 0xff000000 85117395Skan#define IN_CLASSA_NSHIFT 24 86117395Skan#define IN_CLASSA_HOST 0x00ffffff 87117395Skan#define IN_CLASSA_MAX 128 88117395Skan 89117395Skan#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 90169689Skan#define IN_CLASSB_NET 0xffff0000 91169689Skan#define IN_CLASSB_NSHIFT 16 92117395Skan#define IN_CLASSB_HOST 0x0000ffff 93117395Skan#define IN_CLASSB_MAX 65536 94169689Skan 95169689Skan#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 96169689Skan#define IN_CLASSC_NET 0xffffff00 97169689Skan#define IN_CLASSC_NSHIFT 8 98169689Skan#define IN_CLASSC_HOST 0x000000ff 99169689Skan 100169689Skan#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 101117395Skan#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 102117395Skan#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 103117395Skan#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 104117395Skan#define IN_MULTICAST(i) IN_CLASSD(i) 105117395Skan 106117395Skan#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 107117395Skan#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 108117395Skan 109117395Skan#define INADDR_ANY (u_long)0x00000000 110117395Skan#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 111117395Skan#ifndef KERNEL 112117395Skan#define INADDR_NONE 0xffffffff /* -1 return */ 113117395Skan#endif 114117395Skan 115117395Skan#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 116117395Skan#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 117117395Skan#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 118117395Skan 119117395Skan#define IN_LOOPBACKNET 127 /* official! */ 120117395Skan 121169689Skan/* 122169689Skan * Socket address, internet style. 123117395Skan */ 124117395Skanstruct sockaddr_in { 125117395Skan u_char sin_len; 126117395Skan u_char sin_family; 127169689Skan u_short sin_port; 128169689Skan struct in_addr sin_addr; 129117395Skan char sin_zero[8]; 130117395Skan}; 131117395Skan 132117395Skan/* 133117395Skan * Structure used to describe IP options. 134117395Skan * Used to store options internally, to pass them to a process, 135117395Skan * or to restore options retrieved earlier. 136117395Skan * The ip_dst is used for the first-hop gateway when using a source route 137117395Skan * (this gets put into the header proper). 138117395Skan */ 139117395Skanstruct ip_opts { 140117395Skan struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 141117395Skan char ip_opts[40]; /* actually variable in size */ 142117395Skan}; 143117395Skan 144169689Skan/* 145169689Skan * Options for use with [gs]etsockopt at the IP level. 146117395Skan * First word of comment is data type; bool is stored in int. 147117395Skan */ 148132718Skan#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 149132718Skan#define IP_HDRINCL 2 /* int; header is included with data */ 150117395Skan#define IP_TOS 3 /* int; IP type of service and preced. */ 151117395Skan#define IP_TTL 4 /* int; IP time to live */ 152117395Skan#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 153117395Skan#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 154132718Skan#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 155132718Skan#define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 156132718Skan#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 157132718Skan#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 158132718Skan#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 159132718Skan#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 160132718Skan#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 161169689Skan 162169689Skan/* 163132718Skan * Defaults and limits for options 164132718Skan */ 165132718Skan#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 166132718Skan#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 167132718Skan#define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 168132718Skan 169132718Skan/* 170132718Skan * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 171117395Skan */ 172117395Skanstruct ip_mreq { 173117395Skan struct in_addr imr_multiaddr; /* IP multicast address of group */ 174117395Skan struct in_addr imr_interface; /* local IP address of interface */ 175117395Skan}; 176117395Skan 177117395Skan/* 178169689Skan * Definitions for inet sysctl operations. 179169689Skan * 180117395Skan * Third level is protocol number. 181117395Skan * Fourth level is desired variable within that protocol. 182117395Skan */ 183132718Skan#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 184132718Skan 185132718Skan#define CTL_IPPROTO_NAMES { \ 186132718Skan { "ip", CTLTYPE_NODE }, \ 187132718Skan { "icmp", CTLTYPE_NODE }, \ 188132718Skan { "igmp", CTLTYPE_NODE }, \ 189132718Skan { "ggp", CTLTYPE_NODE }, \ 190132718Skan { 0, 0 }, \ 191132718Skan { 0, 0 }, \ 192132718Skan { "tcp", CTLTYPE_NODE }, \ 193132718Skan { 0, 0 }, \ 194132718Skan { "egp", CTLTYPE_NODE }, \ 195169689Skan { 0, 0 }, \ 196169689Skan { 0, 0 }, \ 197132718Skan { 0, 0 }, \ 198132718Skan { "pup", CTLTYPE_NODE }, \ 199132718Skan { 0, 0 }, \ 200117395Skan { 0, 0 }, \ 201117395Skan { 0, 0 }, \ 202117395Skan { 0, 0 }, \ 203117395Skan { "udp", CTLTYPE_NODE }, \ 204117395Skan { 0, 0 }, \ 205117395Skan { 0, 0 }, \ 206117395Skan { 0, 0 }, \ 207117395Skan { 0, 0 }, \ 208117395Skan { "idp", CTLTYPE_NODE }, \ 209117395Skan} 210117395Skan 211117395Skan/* 212117395Skan * Names for IP sysctl objects 213117395Skan */ 214117395Skan#define IPCTL_FORWARDING 1 /* act as router */ 215117395Skan#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 216117395Skan#define IPCTL_DEFTTL 3 /* default TTL */ 217117395Skan#ifdef notyet 218117395Skan#define IPCTL_DEFMTU 4 /* default MTU */ 219117395Skan#endif 220117395Skan#define IPCTL_MAXID 5 221117395Skan 222169689Skan#define IPCTL_NAMES { \ 223169689Skan { 0, 0 }, \ 224169689Skan { "forwarding", CTLTYPE_INT }, \ 225117395Skan { "redirect", CTLTYPE_INT }, \ 226117395Skan { "ttl", CTLTYPE_INT }, \ 227117395Skan { "mtu", CTLTYPE_INT }, \ 228117395Skan} 229117395Skan 230117395Skan 231117395Skan#ifdef KERNEL 232117395Skanint in_broadcast __P((struct in_addr, struct ifnet *)); 233117395Skanint in_canforward __P((struct in_addr)); 234117395Skanint in_cksum __P((struct mbuf *, int)); 235117395Skanint in_localaddr __P((struct in_addr)); 236117395Skanu_long in_netof __P((struct in_addr)); 237117395Skanvoid in_socktrim __P((struct sockaddr_in *)); 238117395Skan#endif 239117395Skan