in.h revision 12003
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 1.11 1995/07/18 09:56:42 peter 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 * Internet address (a structure for historical reasons) 79 */ 80struct in_addr { 81 u_long s_addr; 82}; 83 84/* 85 * Definitions of bits in internet address integers. 86 * On subnets, the decomposition of addresses to host and net parts 87 * is done according to subnet mask, not the masks here. 88 */ 89#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0) 90#define IN_CLASSA_NET 0xff000000 91#define IN_CLASSA_NSHIFT 24 92#define IN_CLASSA_HOST 0x00ffffff 93#define IN_CLASSA_MAX 128 94 95#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000) 96#define IN_CLASSB_NET 0xffff0000 97#define IN_CLASSB_NSHIFT 16 98#define IN_CLASSB_HOST 0x0000ffff 99#define IN_CLASSB_MAX 65536 100 101#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000) 102#define IN_CLASSC_NET 0xffffff00 103#define IN_CLASSC_NSHIFT 8 104#define IN_CLASSC_HOST 0x000000ff 105 106#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000) 107#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 108#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 109#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 110#define IN_MULTICAST(i) IN_CLASSD(i) 111 112#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000) 113#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000) 114 115#define INADDR_ANY (u_long)0x00000000 116#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */ 117#ifndef KERNEL 118#define INADDR_NONE 0xffffffff /* -1 return */ 119#endif 120 121#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */ 122#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */ 123#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */ 124 125#define IN_LOOPBACKNET 127 /* official! */ 126 127/* 128 * Socket address, internet style. 129 */ 130struct sockaddr_in { 131 u_char sin_len; 132 u_char sin_family; 133 u_short sin_port; 134 struct in_addr sin_addr; 135 char sin_zero[8]; 136}; 137 138/* 139 * Structure used to describe IP options. 140 * Used to store options internally, to pass them to a process, 141 * or to restore options retrieved earlier. 142 * The ip_dst is used for the first-hop gateway when using a source route 143 * (this gets put into the header proper). 144 */ 145struct ip_opts { 146 struct in_addr ip_dst; /* first hop, 0 w/o src rt */ 147 char ip_opts[40]; /* actually variable in size */ 148}; 149 150/* 151 * Options for use with [gs]etsockopt at the IP level. 152 * First word of comment is data type; bool is stored in int. 153 */ 154#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */ 155#define IP_HDRINCL 2 /* int; header is included with data */ 156#define IP_TOS 3 /* int; IP type of service and preced. */ 157#define IP_TTL 4 /* int; IP time to live */ 158#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */ 159#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */ 160#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */ 161#define IP_RETOPTS 8 /* ip_opts; set/get IP options */ 162#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */ 163#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */ 164#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */ 165#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */ 166#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */ 167#define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */ 168#define IP_RSVP_ON 15 /* enable RSVP in kernel */ 169#define IP_RSVP_OFF 16 /* disable RSVP in kernel */ 170#define IP_RSVP_VIF_ON 17 /* set RSVP per-vif socket */ 171#define IP_RSVP_VIF_OFF 18 /* unset RSVP per-vif socket */ 172 173/* 174 * Defaults and limits for options 175 */ 176#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */ 177#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */ 178#define IP_MAX_MEMBERSHIPS 20 /* per socket */ 179 180/* 181 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 182 */ 183struct ip_mreq { 184 struct in_addr imr_multiaddr; /* IP multicast address of group */ 185 struct in_addr imr_interface; /* local IP address of interface */ 186}; 187 188/* 189 * Definitions for inet sysctl operations. 190 * 191 * Third level is protocol number. 192 * Fourth level is desired variable within that protocol. 193 */ 194#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */ 195 196#define CTL_IPPROTO_NAMES { \ 197 { "ip", CTLTYPE_NODE }, \ 198 { "icmp", CTLTYPE_NODE }, \ 199 { "igmp", CTLTYPE_NODE }, \ 200 { "ggp", CTLTYPE_NODE }, \ 201 { 0, 0 }, \ 202 { 0, 0 }, \ 203 { "tcp", CTLTYPE_NODE }, \ 204 { 0, 0 }, \ 205 { "egp", CTLTYPE_NODE }, \ 206 { 0, 0 }, \ 207 { 0, 0 }, \ 208 { 0, 0 }, \ 209 { "pup", CTLTYPE_NODE }, \ 210 { 0, 0 }, \ 211 { 0, 0 }, \ 212 { 0, 0 }, \ 213 { 0, 0 }, \ 214 { "udp", CTLTYPE_NODE }, \ 215 { 0, 0 }, \ 216 { 0, 0 }, \ 217 { 0, 0 }, \ 218 { 0, 0 }, \ 219 { "idp", CTLTYPE_NODE }, \ 220} 221 222/* 223 * Names for IP sysctl objects 224 */ 225#define IPCTL_FORWARDING 1 /* act as router */ 226#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */ 227#define IPCTL_DEFTTL 3 /* default TTL */ 228#ifdef notyet 229#define IPCTL_DEFMTU 4 /* default MTU */ 230#endif 231#define IPCTL_RTEXPIRE 5 /* cloned route expiration time */ 232#define IPCTL_RTMINEXPIRE 6 /* min value for expiration time */ 233#define IPCTL_RTMAXCACHE 7 /* trigger level for dynamic expire */ 234#define IPCTL_SOURCEROUTE 8 /* may perform source routes */ 235#define IPCTL_DIRECTEDBROADCAST 9 /* may re-broadcast received packets */ 236#define IPCTL_INTRQMAXLEN 10 /* max length of netisr queue */ 237#define IPCTL_INTRQDROPS 11 /* number of netisr q drops */ 238#define IPCTL_MAXID 12 239 240#define IPCTL_NAMES { \ 241 { 0, 0 }, \ 242 { "forwarding", CTLTYPE_INT }, \ 243 { "redirect", CTLTYPE_INT }, \ 244 { "ttl", CTLTYPE_INT }, \ 245 { "mtu", CTLTYPE_INT }, \ 246 { "rtexpire", CTLTYPE_INT }, \ 247 { "rtminexpire", CTLTYPE_INT }, \ 248 { "rtmaxcache", CTLTYPE_INT }, \ 249 { "sourceroute", CTLTYPE_INT }, \ 250 { "directed-broadcast", CTLTYPE_INT }, \ 251 { "intr-queue-maxlen", CTLTYPE_INT }, \ 252 { "intr-queue-drops", CTLTYPE_INT }, \ 253} 254 255 256#ifdef KERNEL 257struct ifnet; struct mbuf; /* forward declarations for Standard C */ 258 259int in_broadcast __P((struct in_addr, struct ifnet *)); 260int in_canforward __P((struct in_addr)); 261int in_cksum __P((struct mbuf *, int)); 262int in_localaddr __P((struct in_addr)); 263u_long in_netof __P((struct in_addr)); 264void in_socktrim __P((struct sockaddr_in *)); 265char *inet_ntoa __P((struct in_addr)); /* in libkern */ 266#endif 267 268#endif 269 270