/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef __NETINET_IP_H
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#define __NETINET_IP_H 1
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#include <features.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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__BEGIN_DECLS
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struct timestamp
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{
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uint8_t len;
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uint8_t ptr;
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int flags:4;
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unsigned int overflow:4;
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#elif __BYTE_ORDER == __BIG_ENDIAN
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unsigned int overflow:4;
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unsigned int flags:4;
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#else
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# error "Please fix <bits/endian.h>"
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#endif
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uint32_t data[9];
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};
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struct iphdr
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{
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int ihl:4;
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unsigned int version:4;
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#elif __BYTE_ORDER == __BIG_ENDIAN
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unsigned int version:4;
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unsigned int ihl:4;
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#else
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# error "Please fix <bits/endian.h>"
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#endif
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uint8_t tos;
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uint16_t tot_len;
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uint16_t id;
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uint16_t frag_off;
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uint8_t ttl;
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uint8_t protocol;
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uint16_t check;
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uint32_t saddr;
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uint32_t daddr;
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/*The options start here. */
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};
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#ifdef __USE_MISC
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/*
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* Copyright (c) 1982, 1986, 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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* 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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* @(#)ip.h 8.1 (Berkeley) 6/10/93
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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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/*
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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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{
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int ip_hl:4; /* header length */
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unsigned int ip_v:4; /* version */
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#endif
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned int ip_v:4; /* version */
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unsigned int ip_hl:4; /* header length */
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#endif
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uint8_t ip_tos; /* type of service */
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unsigned short ip_len; /* total length */
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unsigned short ip_id; /* identification */
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unsigned short ip_off; /* fragment offset field */
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#define IP_RF 0x8000 /* reserved fragment flag */
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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 /* mask for fragmenting bits */
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uint8_t ip_ttl; /* time to live */
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uint8_t ip_p; /* protocol */
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unsigned 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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/*
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* Time stamp option structure.
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*/
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struct ip_timestamp
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{
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uint8_t ipt_code; /* IPOPT_TS */
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uint8_t ipt_len; /* size of structure (variable) */
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uint8_t ipt_ptr; /* index of current entry */
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int ipt_flg:4; /* flags, see below */
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unsigned int ipt_oflw:4; /* overflow counter */
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#endif
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned int ipt_oflw:4; /* overflow counter */
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unsigned int ipt_flg:4; /* flags, see below */
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#endif
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uint32_t data[9];
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};
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#endif /* __USE_MISC */
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#define IPVERSION 4 /* IP version number */
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#define IP_MAXPACKET 65535 /* maximum packet size */
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/*
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* Definitions for Explicit Congestion Notification (ECN)
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*
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* Taken from RFC-3168, Section 5.
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*/
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#define IPTOS_ECN_MASK 0x03
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#define IPTOS_ECN(x) ((x) & IPTOS_ECN_MASK)
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#define IPTOS_ECN_NOT_ECT 0x00
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#define IPTOS_ECN_ECT1 0x01
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#define IPTOS_ECN_ECT0 0x02
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#define IPTOS_ECN_CE 0x03
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/*
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* Definitions for IP differentiated services code points (DSCP)
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*
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* Taken from RFC-2597, Section 6 and RFC-2598, Section 2.3.
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*/
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#define IPTOS_DSCP_MASK 0xfc
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#define IPTOS_DSCP(x) ((x) & IPTOS_DSCP_MASK)
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#define IPTOS_DSCP_AF11 0x28
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#define IPTOS_DSCP_AF12 0x30
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#define IPTOS_DSCP_AF13 0x38
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#define IPTOS_DSCP_AF21 0x48
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#define IPTOS_DSCP_AF22 0x50
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#define IPTOS_DSCP_AF23 0x58
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#define IPTOS_DSCP_AF31 0x68
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#define IPTOS_DSCP_AF32 0x70
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#define IPTOS_DSCP_AF33 0x78
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#define IPTOS_DSCP_AF41 0x88
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#define IPTOS_DSCP_AF42 0x90
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#define IPTOS_DSCP_AF43 0x98
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#define IPTOS_DSCP_EF 0xb8
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/*
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* In RFC 2474, Section 4.2.2.1, the Class Selector Codepoints subsume
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* the old ToS Precedence values.
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*/
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#define IPTOS_CLASS_MASK 0xe0
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#define IPTOS_CLASS(class) ((class) & IPTOS_CLASS_MASK)
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#define IPTOS_CLASS_CS0 0x00
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#define IPTOS_CLASS_CS1 0x20
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#define IPTOS_CLASS_CS2 0x40
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#define IPTOS_CLASS_CS3 0x60
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#define IPTOS_CLASS_CS4 0x80
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#define IPTOS_CLASS_CS5 0xa0
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#define IPTOS_CLASS_CS6 0xc0
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#define IPTOS_CLASS_CS7 0xe0
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#define IPTOS_CLASS_DEFAULT IPTOS_CLASS_CS0
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/*
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* Definitions for IP type of service (ip_tos) [deprecated; use DSCP
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* and CS definitions above instead.]
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*/
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#define IPTOS_TOS_MASK 0x1E
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#define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK)
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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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#define IPTOS_LOWCOST 0x02
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#define IPTOS_MINCOST IPTOS_LOWCOST
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/*
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* Definitions for IP precedence (also in ip_tos) [also deprecated.]
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*/
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#define IPTOS_PREC_MASK IPTOS_CLASS_MASK
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#define IPTOS_PREC(tos) IPTOS_CLASS(tos)
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#define IPTOS_PREC_NETCONTROL IPTOS_CLASS_CS7
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#define IPTOS_PREC_INTERNETCONTROL IPTOS_CLASS_CS6
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#define IPTOS_PREC_CRITIC_ECP IPTOS_CLASS_CS5
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#define IPTOS_PREC_FLASHOVERRIDE IPTOS_CLASS_CS4
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#define IPTOS_PREC_FLASH IPTOS_CLASS_CS3
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#define IPTOS_PREC_IMMEDIATE IPTOS_CLASS_CS2
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#define IPTOS_PREC_PRIORITY IPTOS_CLASS_CS1
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#define IPTOS_PREC_ROUTINE IPTOS_CLASS_CS0
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/*
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* Definitions for options.
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*/
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#define IPOPT_COPY 0x80
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#define IPOPT_CLASS_MASK 0x60
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#define IPOPT_NUMBER_MASK 0x1f
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#define IPOPT_COPIED(o) ((o) & IPOPT_COPY)
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#define IPOPT_CLASS(o) ((o) & IPOPT_CLASS_MASK)
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#define IPOPT_NUMBER(o) ((o) & IPOPT_NUMBER_MASK)
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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_MEASUREMENT IPOPT_DEBMEAS
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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_END IPOPT_EOL
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#define IPOPT_NOP 1 /* no operation */
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#define IPOPT_NOOP IPOPT_NOP
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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_TIMESTAMP IPOPT_TS
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#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
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#define IPOPT_SEC IPOPT_SECURITY
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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_SID IPOPT_SATID
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#define IPOPT_SSRR 137 /* strict source route */
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#define IPOPT_RA 148 /* router alert */
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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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#define MAX_IPOPTLEN 40
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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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/* bits for security (not byte swapped) */
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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 IPDEFTTL 64 /* default ttl, from RFC 1340 */
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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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__END_DECLS
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#endif /* netinet/ip.h */
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