in.h revision 7088
1249259Sdim/* 2249259Sdim * Copyright (c) 1982, 1986, 1990, 1993 3249259Sdim * The Regents of the University of California. All rights reserved. 4249259Sdim * 5249259Sdim * Redistribution and use in source and binary forms, with or without 6249259Sdim * modification, are permitted provided that the following conditions 7249259Sdim * are met: 8249259Sdim * 1. Redistributions of source code must retain the above copyright 9249259Sdim * notice, this list of conditions and the following disclaimer. 10249259Sdim * 2. Redistributions in binary form must reproduce the above copyright 11249259Sdim * notice, this list of conditions and the following disclaimer in the 12249259Sdim * documentation and/or other materials provided with the distribution. 13249259Sdim * 3. All advertising materials mentioning features or use of this software 14249259Sdim * must display the following acknowledgement: 15249259Sdim * This product includes software developed by the University of 16249259Sdim * California, Berkeley and its contributors. 17249259Sdim * 4. Neither the name of the University nor the names of its contributors 18249259Sdim * may be used to endorse or promote products derived from this software 19249259Sdim * without specific prior written permission. 20249259Sdim * 21249259Sdim * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22249259Sdim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23249259Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24249259Sdim * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25249259Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26249259Sdim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27249259Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28249259Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29249259Sdim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30249259Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31249259Sdim * SUCH DAMAGE. 32249259Sdim * 33249259Sdim * @(#)in.h 8.3 (Berkeley) 1/3/94 34249259Sdim * $Id: in.h,v 1.7 1995/02/14 23:04:50 wollman Exp $ 35249259Sdim */ 36263508Sdim 37249259Sdim#ifndef _NETINET_IN_H_ 38249259Sdim#define _NETINET_IN_H_ 39249259Sdim 40249259Sdim/* 41249259Sdim * Constants and structures defined by the internet system, 42249259Sdim * Per RFC 790, September 1981, and numerous additions. 43249259Sdim */ 44249259Sdim 45249259Sdim/* 46249259Sdim * Protocols 47249259Sdim */ 48249259Sdim#define IPPROTO_IP 0 /* dummy for IP */ 49249259Sdim#define IPPROTO_ICMP 1 /* control message protocol */ 50249259Sdim#define IPPROTO_IGMP 2 /* group mgmt protocol */ 51249259Sdim#define IPPROTO_GGP 3 /* gateway^2 (deprecated) */ 52249259Sdim#define IPPROTO_TCP 6 /* tcp */ 53249259Sdim#define IPPROTO_EGP 8 /* exterior gateway protocol */ 54249259Sdim#define IPPROTO_PUP 12 /* pup */ 55249259Sdim#define IPPROTO_UDP 17 /* user datagram protocol */ 56249259Sdim#define IPPROTO_IDP 22 /* xns idp */ 57249259Sdim#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */ 58249259Sdim#define IPPROTO_RSVP 46 /* resource reservation */ 59249259Sdim#define IPPROTO_EON 80 /* ISO cnlp */ 60249259Sdim#define IPPROTO_ENCAP 98 /* encapsulation header */ 61249259Sdim 62249259Sdim#define IPPROTO_RAW 255 /* raw IP packet */ 63263508Sdim#define IPPROTO_MAX 256 64263508Sdim 65249259Sdim 66249259Sdim/* 67249259Sdim * Local port number conventions: 68263508Sdim * Ports < IPPORT_RESERVED are reserved for 69263508Sdim * privileged processes (e.g. root). 70263508Sdim * Ports > IPPORT_USERRESERVED are reserved 71249259Sdim * for servers, not necessarily privileged. 72263508Sdim */ 73263508Sdim#define IPPORT_RESERVED 1024 74249259Sdim#define IPPORT_USERRESERVED 5000 75263508Sdim 76249259Sdim/* 77249259Sdim * Internet address (a structure for historical reasons) 78249259Sdim */ 79249259Sdimstruct in_addr { 80249259Sdim u_long s_addr; 81249259Sdim}; 82249259Sdim 83249259Sdim/* 84249259Sdim * Definitions of bits in internet address integers. 85263508Sdim * On subnets, the decomposition of addresses to host and net parts 86249259Sdim * is done according to subnet mask, not the masks here. 87249259Sdim */ 88249259Sdim#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 89249259Sdim#define IN_CLASSA_NET 0xff000000 90249259Sdim#define IN_CLASSA_NSHIFT 24 91263508Sdim#define IN_CLASSA_HOST 0x00ffffff 92263508Sdim#define IN_CLASSA_MAX 128 93263508Sdim 94263508Sdim#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 95263508Sdim#define IN_CLASSB_NET 0xffff0000 96263508Sdim#define IN_CLASSB_NSHIFT 16 97263508Sdim#define IN_CLASSB_HOST 0x0000ffff 98263508Sdim#define IN_CLASSB_MAX 65536 99249259Sdim 100249259Sdim#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 101249259Sdim#define IN_CLASSC_NET 0xffffff00 102249259Sdim#define IN_CLASSC_NSHIFT 8 103249259Sdim#define IN_CLASSC_HOST 0x000000ff 104249259Sdim 105249259Sdim#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 106249259Sdim#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 107249259Sdim#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 108249259Sdim#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 109249259Sdim#define IN_MULTICAST(i) IN_CLASSD(i) 110249259Sdim 111249259Sdim#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 112263508Sdim#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 113263508Sdim 114263508Sdim#define INADDR_ANY (u_long)0x00000000 115263508Sdim#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 116263508Sdim#ifndef KERNEL 117263508Sdim#define INADDR_NONE 0xffffffff /* -1 return */ 118263508Sdim#endif 119263508Sdim 120263508Sdim#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 121263508Sdim#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 122263508Sdim#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 123263508Sdim 124249259Sdim#define IN_LOOPBACKNET 127 /* official! */ 125249259Sdim 126249259Sdim/* 127263508Sdim * Socket address, internet style. 128263508Sdim */ 129263508Sdimstruct sockaddr_in { 130263508Sdim u_char sin_len; 131263508Sdim u_char sin_family; 132263508Sdim u_short sin_port; 133249259Sdim struct in_addr sin_addr; 134263508Sdim char sin_zero[8]; 135263508Sdim}; 136249259Sdim 137249259Sdim/* 138249259Sdim * Structure used to describe IP options. 139249259Sdim * Used to store options internally, to pass them to a process, 140249259Sdim * or to restore options retrieved earlier. 141249259Sdim * The ip_dst is used for the first-hop gateway when using a source route 142249259Sdim * (this gets put into the header proper). 143249259Sdim */ 144249259Sdimstruct ip_opts { 145249259Sdim struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 146249259Sdim char ip_opts[40]; /* actually variable in size */ 147263508Sdim}; 148263508Sdim 149263508Sdim/* 150263508Sdim * Options for use with [gs]etsockopt at the IP level. 151263508Sdim * First word of comment is data type; bool is stored in int. 152263508Sdim */ 153263508Sdim#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 154249259Sdim#define IP_HDRINCL 2 /* int; header is included with data */ 155249259Sdim#define IP_TOS 3 /* int; IP type of service and preced. */ 156249259Sdim#define IP_TTL 4 /* int; IP time to live */ 157249259Sdim#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 158249259Sdim#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 159249259Sdim#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 160263508Sdim#define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 161249259Sdim#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 162249259Sdim#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 163249259Sdim#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 164249259Sdim#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 165249259Sdim#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 166249259Sdim#define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */ 167263508Sdim#define IP_RSVP_ON 15 /* enable RSVP in kernel */ 168249259Sdim#define IP_RSVP_OFF 16 /* disable RSVP in kernel */ 169263508Sdim 170263508Sdim 171263508Sdim/* 172263508Sdim * Defaults and limits for options 173263508Sdim */ 174263508Sdim#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 175249259Sdim#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 176249259Sdim#define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */ 177249259Sdim 178249259Sdim/* 179249259Sdim * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 180263508Sdim */ 181249259Sdimstruct ip_mreq { 182249259Sdim struct in_addr imr_multiaddr; /* IP multicast address of group */ 183251662Sdim struct in_addr imr_interface; /* local IP address of interface */ 184251662Sdim}; 185249259Sdim 186249259Sdim/* 187249259Sdim * Definitions for inet sysctl operations. 188249259Sdim * 189249259Sdim * Third level is protocol number. 190249259Sdim * Fourth level is desired variable within that protocol. 191249259Sdim */ 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_RTEXPIRE 5 /* cloned route expiration time */ 230#define IPCTL_RTMINEXPIRE 6 /* min value for expiration time */ 231#define IPCTL_RTMAXCACHE 7 /* trigger level for dynamic expire */ 232#define IPCTL_MAXID 8 233 234#define IPCTL_NAMES { \ 235 { 0, 0 }, \ 236 { "forwarding", CTLTYPE_INT }, \ 237 { "redirect", CTLTYPE_INT }, \ 238 { "ttl", CTLTYPE_INT }, \ 239 { "mtu", CTLTYPE_INT }, \ 240 { "rtexpire", CTLTYPE_INT }, \ 241 { "rtminexpire", CTLTYPE_INT }, \ 242 { "rtmaxcache", CTLTYPE_INT }, \ 243} 244 245 246#ifdef KERNEL 247struct ifnet; struct mbuf; /* forward declarations for Standard C */ 248 249int in_broadcast __P((struct in_addr, struct ifnet *)); 250int in_canforward __P((struct in_addr)); 251int in_cksum __P((struct mbuf *, int)); 252int in_localaddr __P((struct in_addr)); 253u_long in_netof __P((struct in_addr)); 254void in_socktrim __P((struct sockaddr_in *)); 255char *inet_ntoa __P((struct in_addr)); /* in libkern */ 256#endif 257 258#endif 259 260