288 lines
9.7 KiB
C
288 lines
9.7 KiB
C
/* $NetBSD: in.h,v 1.28 1997/10/18 21:18:29 kml Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in.h 8.3 (Berkeley) 1/3/94
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*/
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/*
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* Constants and structures defined by the internet system,
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* Per RFC 790, September 1981, and numerous additions.
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*/
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#ifndef _NETINET_IN_H_
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#define _NETINET_IN_H_
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/*
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* Protocols
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*/
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#define IPPROTO_IP 0 /* dummy for IP */
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#define IPPROTO_ICMP 1 /* control message protocol */
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#define IPPROTO_IGMP 2 /* group mgmt protocol */
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#define IPPROTO_GGP 3 /* gateway^2 (deprecated) */
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#define IPPROTO_IPIP 4 /* IP inside IP */
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#define IPPROTO_TCP 6 /* tcp */
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#define IPPROTO_EGP 8 /* exterior gateway protocol */
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#define IPPROTO_PUP 12 /* pup */
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#define IPPROTO_UDP 17 /* user datagram protocol */
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#define IPPROTO_IDP 22 /* xns idp */
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#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */
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#define IPPROTO_ESP 50 /* encap. security payload */
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#define IPPROTO_AH 51 /* authentication header */
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#define IPPROTO_EON 80 /* ISO cnlp */
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#define IPPROTO_ENCAP 98 /* encapsulation header */
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#define IPPROTO_RAW 255 /* raw IP packet */
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#define IPPROTO_MAX 256
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/*
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* Local port number conventions:
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* Ports < IPPORT_RESERVED are reserved for
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* privileged processes (e.g. root).
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* Ports > IPPORT_USERRESERVED are reserved
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* for servers, not necessarily privileged.
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*/
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#define IPPORT_RESERVED 1024
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#define IPPORT_USERRESERVED 5000
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/*
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* Internet address (a structure for historical reasons)
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*/
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struct in_addr {
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u_int32_t s_addr;
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};
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/*
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* Definitions of bits in internet address integers.
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* On subnets, the decomposition of addresses to host and net parts
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* is done according to subnet mask, not the masks here.
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*
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* By byte-swapping the constants, we avoid ever having to byte-swap IP
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* addresses inside the kernel. Unfortunately, user-level programs rely
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* on these macros not doing byte-swapping.
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*/
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#ifdef _KERNEL
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#define __IPADDR(x) ((u_int32_t) htonl((u_int32_t)(x)))
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#else
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#define __IPADDR(x) ((u_int32_t)(x))
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#endif
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#define IN_CLASSA(i) (((u_int32_t)(i) & __IPADDR(0x80000000)) == \
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__IPADDR(0x00000000))
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#define IN_CLASSA_NET __IPADDR(0xff000000)
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#define IN_CLASSA_NSHIFT 24
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#define IN_CLASSA_HOST __IPADDR(0x00ffffff)
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#define IN_CLASSA_MAX 128
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#define IN_CLASSB(i) (((u_int32_t)(i) & __IPADDR(0xc0000000)) == \
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__IPADDR(0x80000000))
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#define IN_CLASSB_NET __IPADDR(0xffff0000)
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#define IN_CLASSB_NSHIFT 16
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#define IN_CLASSB_HOST __IPADDR(0x0000ffff)
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#define IN_CLASSB_MAX 65536
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#define IN_CLASSC(i) (((u_int32_t)(i) & __IPADDR(0xe0000000)) == \
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__IPADDR(0xc0000000))
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#define IN_CLASSC_NET __IPADDR(0xffffff00)
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#define IN_CLASSC_NSHIFT 8
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#define IN_CLASSC_HOST __IPADDR(0x000000ff)
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#define IN_CLASSD(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \
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__IPADDR(0xe0000000))
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/* These ones aren't really net and host fields, but routing needn't know. */
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#define IN_CLASSD_NET __IPADDR(0xf0000000)
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#define IN_CLASSD_NSHIFT 28
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#define IN_CLASSD_HOST __IPADDR(0x0fffffff)
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#define IN_MULTICAST(i) IN_CLASSD(i)
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#define IN_EXPERIMENTAL(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \
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__IPADDR(0xf0000000))
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#define IN_BADCLASS(i) (((u_int32_t)(i) & __IPADDR(0xf0000000)) == \
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__IPADDR(0xf0000000))
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#define IN_LOCAL_GROUP(i) (((u_int32_t)(i) & __IPADDR(0xffffff00)) == \
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__IPADDR(0xe0000000))
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#define INADDR_ANY __IPADDR(0x00000000)
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#define INADDR_LOOPBACK __IPADDR(0x7f000001)
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#define INADDR_BROADCAST __IPADDR(0xffffffff) /* must be masked */
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#ifndef _KERNEL
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#define INADDR_NONE __IPADDR(0xffffffff) /* -1 return */
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#endif
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#define INADDR_UNSPEC_GROUP __IPADDR(0xe0000000) /* 224.0.0.0 */
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#define INADDR_ALLHOSTS_GROUP __IPADDR(0xe0000001) /* 224.0.0.1 */
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#define IN_LOOPBACKNET 127 /* official! */
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/*
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* Socket address, internet style.
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*/
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struct sockaddr_in {
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u_int8_t sin_len;
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u_int8_t sin_family;
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u_int16_t sin_port;
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struct in_addr sin_addr;
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int8_t sin_zero[8];
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};
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/*
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* Structure used to describe IP options.
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* Used to store options internally, to pass them to a process,
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* or to restore options retrieved earlier.
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* The ip_dst is used for the first-hop gateway when using a source route
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* (this gets put into the header proper).
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*/
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struct ip_opts {
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struct in_addr ip_dst; /* first hop, 0 w/o src rt */
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int8_t ip_opts[40]; /* actually variable in size */
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};
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/*
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* Options for use with [gs]etsockopt at the IP level.
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* First word of comment is data type; bool is stored in int.
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*/
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#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */
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#define IP_HDRINCL 2 /* int; header is included with data */
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#define IP_TOS 3 /* int; IP type of service and preced. */
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#define IP_TTL 4 /* int; IP time to live */
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#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */
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#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */
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#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */
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#define IP_RETOPTS 8 /* ip_opts; set/get IP options */
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#define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */
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#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */
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#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */
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#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */
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#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */
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#define IP_RECVIF 20 /* bool; receive reception if w/dgram */
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#define IP_ERRORMTU 21 /* int; get MTU of last xmit = EMSGSIZE */
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/*
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* Defaults and limits for options
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*/
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#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */
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#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */
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#define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */
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/*
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* Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
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*/
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struct ip_mreq {
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struct in_addr imr_multiaddr; /* IP multicast address of group */
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struct in_addr imr_interface; /* local IP address of interface */
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};
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/*
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* Definitions for inet sysctl operations.
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*
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* Third level is protocol number.
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* Fourth level is desired variable within that protocol.
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*/
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#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */
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#define CTL_IPPROTO_NAMES { \
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{ "ip", CTLTYPE_NODE }, \
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{ "icmp", CTLTYPE_NODE }, \
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{ "igmp", CTLTYPE_NODE }, \
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{ "ggp", CTLTYPE_NODE }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ "tcp", CTLTYPE_NODE }, \
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{ 0, 0 }, \
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{ "egp", CTLTYPE_NODE }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ "pup", CTLTYPE_NODE }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ "udp", CTLTYPE_NODE }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ "idp", CTLTYPE_NODE }, \
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}
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/*
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* Names for IP sysctl objects
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*/
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#define IPCTL_FORWARDING 1 /* act as router */
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#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */
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#define IPCTL_DEFTTL 3 /* default TTL */
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#ifdef notyet
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#define IPCTL_DEFMTU 4 /* default MTU */
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#endif
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#define IPCTL_FORWSRCRT 5 /* forward source-routed packets */
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#define IPCTL_DIRECTEDBCAST 6 /* default broadcast behavior */
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#define IPCTL_ALLOWSRCRT 7 /* allow/drop all source-routed pkts */
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#define IPCTL_SUBNETSARELOCAL 8 /* treat subnets as local addresses */
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#define IPCTL_MTUDISC 9 /* allow path MTU discovery */
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#define IPCTL_MAXID 10
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#define IPCTL_NAMES { \
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{ 0, 0 }, \
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{ "forwarding", CTLTYPE_INT }, \
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{ "redirect", CTLTYPE_INT }, \
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{ "ttl", CTLTYPE_INT }, \
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{ "mtu", CTLTYPE_INT }, \
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{ "forwsrcrt", CTLTYPE_INT }, \
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{ "directed-broadcast", CTLTYPE_INT }, \
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{ "allowsrcrt", CTLTYPE_INT }, \
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{ "subnetsarelocal", CTLTYPE_INT }, \
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{ "mtudisc", CTLTYPE_INT }, \
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}
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#ifdef _KERNEL
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extern struct in_addr zeroin_addr;
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int in_broadcast __P((struct in_addr, struct ifnet *));
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int in_canforward __P((struct in_addr));
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int in_cksum __P((struct mbuf *, int));
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int in_localaddr __P((struct in_addr));
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void in_socktrim __P((struct sockaddr_in *));
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#define in_hosteq(s,t) ((s).s_addr == (t).s_addr)
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#define in_nullhost(x) ((x).s_addr == INADDR_ANY)
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#define satosin(sa) ((struct sockaddr_in *)(sa))
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#define sintosa(sin) ((struct sockaddr *)(sin))
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#define ifatoia(ifa) ((struct in_ifaddr *)(ifa))
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#endif
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#endif /* !_NETINET_IN_H_ */
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