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/* IP.H
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*
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* Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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*/
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/** @file
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@publishedAll
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@released
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*/
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/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and that due credit is given
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* to the University of California at Berkeley. The name of the University
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* may not be used to endorse or promote products derived from this
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* software without specific prior written permission. This software
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* is provided ``as is'' without express or implied warranty.
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*/
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/*
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* Definitions for internet protocol version 4.
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* Per RFC 791, September 1981.
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*/
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#ifndef _NETINET_IP_H
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#define _NETINET_IP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define IPVERSION 4
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/**
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Structure of an internet header, naked of options.
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We declare ip_len and ip_off to be short, rather than u_short
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pragmatically since otherwise unsigned comparisons can result
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against negative integers quite easily, and fail in subtle ways.
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*/
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struct ip {
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#ifdef _BIT_FIELDS_LTOH
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u_char ip_hl:4, /* header length */
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ip_v:4; /* version */
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#else
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u_char ip_v:4, /* version */
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ip_hl:4; /* header length */
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#endif
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u_char ip_tos; /* type of service */
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short ip_len; /* total length */
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u_short ip_id; /* identification */
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short ip_off; /* fragment offset field */
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#define IP_DF 0x4000 /* dont fragment flag */
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#define IP_MF 0x2000 /* more fragments flag */
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u_char ip_ttl; /* time to live */
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u_char ip_p; /* protocol */
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u_short ip_sum; /* checksum */
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struct in_addr ip_src, ip_dst; /* source and dest address */
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};
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#define IP_MAXPACKET 65535 /* maximum packet size */
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/**
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Definitions for IP type of service (ip_tos)
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*/
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#define IPTOS_LOWDELAY 0x10
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#define IPTOS_THROUGHPUT 0x08
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#define IPTOS_RELIABILITY 0x04
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/**
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Definitions for IP precedence (also in ip_tos) (hopefully unused)
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*/
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#define IPTOS_PREC_NETCONTROL 0xe0
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#define IPTOS_PREC_INTERNETCONTROL 0xc0
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#define IPTOS_PREC_CRITIC_ECP 0xa0
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#define IPTOS_PREC_FLASHOVERRIDE 0x80
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#define IPTOS_PREC_FLASH 0x60
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#define IPTOS_PREC_IMMEDIATE 0x40
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#define IPTOS_PREC_PRIORITY 0x20
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#define IPTOS_PREC_ROUTINE 0x00
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/**
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Definitions for options.
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*/
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#define IPOPT_COPIED(o) ((o)&0x80)
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#define IPOPT_CLASS(o) ((o)&0x60)
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#define IPOPT_NUMBER(o) ((o)&0x1f)
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#define IPOPT_CONTROL 0x00
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#define IPOPT_RESERVED1 0x20
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#define IPOPT_DEBMEAS 0x40
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#define IPOPT_RESERVED2 0x60
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#define IPOPT_EOL 0 /* end of option list */
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#define IPOPT_NOP 1 /* no operation */
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#define IPOPT_RR 7 /* record packet route */
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#define IPOPT_TS 68 /* timestamp */
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#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
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#define IPOPT_LSRR 131 /* loose source route */
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#define IPOPT_SATID 136 /* satnet id */
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#define IPOPT_SSRR 137 /* strict source route */
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/**
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Offsets to fields in options other than EOL and NOP.
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*/
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#define IPOPT_OPTVAL 0 /* option ID */
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#define IPOPT_OLEN 1 /* option length */
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#define IPOPT_OFFSET 2 /* offset within option */
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#define IPOPT_MINOFF 4 /* min value of above */
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/**
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Time stamp option structure.
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*/
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struct ip_timestamp {
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u_char ipt_code; /* IPOPT_TS */
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u_char ipt_len; /* size of structure (variable) */
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u_char ipt_ptr; /* index of current entry */
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#ifdef _BIT_FIELDS_LTOH
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u_char ipt_flg:4, /* flags, see below */
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ipt_oflw:4; /* overflow counter */
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#else
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u_char ipt_oflw:4, /* overflow counter */
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ipt_flg:4; /* flags, see below */
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#endif
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union ipt_timestamp {
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n_long ipt_time[1];
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struct ipt_ta {
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struct in_addr ipt_addr;
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n_long ipt_time;
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} ipt_ta[1];
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} ipt_timestamp;
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};
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/**
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flag bits for ipt_flg
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*/
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#define IPOPT_TS_TSONLY 0 /* timestamps only */
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#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
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#define IPOPT_TS_PRESPEC 2 /* specified modules only */
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/**
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bits for security (not byte swapped)
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*/
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#define IPOPT_SECUR_UNCLASS 0x0000
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#define IPOPT_SECUR_CONFID 0xf135
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#define IPOPT_SECUR_EFTO 0x789a
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#define IPOPT_SECUR_MMMM 0xbc4d
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#define IPOPT_SECUR_RESTR 0xaf13
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#define IPOPT_SECUR_SECRET 0xd788
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#define IPOPT_SECUR_TOPSECRET 0x6bc5
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/**
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Internet implementation parameters.
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*/
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#define MAXTTL 255 /* maximum time to live (seconds) */
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#define IPFRAGTTL 60 /* time to live for frags, slowhz */
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#define IPTTLDEC 1 /* subtracted when forwarding */
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#define IP_MSS 576 /* default maximum segment size */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _NETINET_IP_H */
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