166 lines
5.0 KiB
C
166 lines
5.0 KiB
C
/*
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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 is only permitted until one year after the first shipment
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* of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
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* binary forms are permitted provided that: (1) source distributions retain
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* this entire copyright notice and comment, and (2) distributions including
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* binaries display the following acknowledgement: This product includes
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* software developed by the University of California, Berkeley and its
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* contributors'' in the documentation or other materials provided with the
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* distribution and in all advertising materials mentioning features or use
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* of this software. Neither the name of the University nor the names of
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* its contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#)ip.h 7.10 (Berkeley) 6/28/90
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*/
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#include <sys/endian.h>
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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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/*
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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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#define IPVERSION 4
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/*
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* Structure of an internet header, naked of options.
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*/
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struct ip {
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#if BYTE_ORDER == LITTLE_ENDIAN
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u_char ip_hl:4, /* header length */
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ip_v:4; /* version */
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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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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u_short ip_len; /* total length */
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u_short ip_id; /* identification */
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u_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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#define IP_OFFMASK 0x1fff /* fragment offset mask */
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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 0x10
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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 /* RFC 1108 RIPSO BSO */
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#define IPOPT_LSRR 131 /* loose source route */
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#define IPOPT_ESO 133 /* RFC 1108 RIPSO ESO*/
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#define IPOPT_CIPSO 134 /* Commercial IPSO */
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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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#if BYTE_ORDER == LITTLE_ENDIAN
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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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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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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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/* flag bits for ipt_flg */
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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 3 /* specified modules only */
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/* security bits defined in RFC 1108 */
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#define IPOPT_SECUR_RESERVED_4 0x01
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#define IPOPT_SECUR_TOPSECRET 0x3d
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#define IPOPT_SECUR_SECRET 0x5a
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#define IPOPT_SECUR_CONFID 0x96
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#define IPOPT_SECUR_RESERVED_3 0x66
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#define IPOPT_SECUR_RESERVED_2 0xcc
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#define IPOPT_SECUR_UNCLASS 0xab
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#define IPOPT_SECUR_RESERVED_1 0xf1
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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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