142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
#ifndef NET_IN_H
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#define NET_IN_H \
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"$Id: in.h,v 4.2 1994/10/05 23:12:24 ppessi Exp $"
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/*
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* Generic internet definitions
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*
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* Copyright © 1994 AmiTCP/IP Group,
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* Network Solutions Development, Inc.
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* All rights reserved.
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*/
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#define IN_H XXX - compatibility
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/*
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* Macros for network/external number representation conversion.
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*/
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#ifndef ntohl
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#define ntohl(x) (x)
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#define ntohs(x) (x)
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#define htonl(x) (x)
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#define htons(x) (x)
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#define NTOHL(x) (x)
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#define NTOHS(x) (x)
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#define HTONL(x) (x)
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#define HTONS(x) (x)
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#endif
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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.
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*/
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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_GGP 3 /* gateway^2 (deprecated) */
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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_EON 80 /* ISO cnlp */
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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_long 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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#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0)
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#define IN_CLASSA_NET 0xff000000
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#define IN_CLASSA_NSHIFT 24
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#define IN_CLASSA_HOST 0x00ffffff
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#define IN_CLASSA_MAX 128
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#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000)
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#define IN_CLASSB_NET 0xffff0000
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#define IN_CLASSB_NSHIFT 16
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#define IN_CLASSB_HOST 0x0000ffff
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#define IN_CLASSB_MAX 65536
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#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000)
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#define IN_CLASSC_NET 0xffffff00
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#define IN_CLASSC_NSHIFT 8
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#define IN_CLASSC_HOST 0x000000ff
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#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000)
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#define IN_MULTICAST(i) IN_CLASSD(i)
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#define IN_EXPERIMENTAL(i) (((long)(i) & 0xe0000000) == 0xe0000000)
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#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000)
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#define INADDR_ANY (u_long)0x00000000
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#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */
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#if !defined(KERNEL) || defined(AMITCP)
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#define INADDR_NONE 0xffffffff /* -1 return */
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#endif
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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_char sin_len;
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u_char sin_family;
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u_short sin_port;
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struct in_addr sin_addr;
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char 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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char 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 per-packet options */
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#define IP_HDRINCL 2 /* int; header is included with data (raw) */
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#define IP_TOS 3 /* int; IP type of service and precedence */
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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 options w/datagram */
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#define IP_RECVRETOPTS 6 /* bool; receive IP options for response */
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#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/datagram */
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#define IP_RETOPTS 8 /* ip_opts; set/get IP per-packet options */
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#endif /* !IN_H */
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