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+ /*
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+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
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+ *
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+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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+ *
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+ * This file contains Original Code and/or Modifications of Original Code
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+ * as defined in and that are subject to the Apple Public Source License
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+ * Version 2.0 (the 'License'). You may not use this file except in
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+ * compliance with the License. The rights granted to you under the License
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+ * may not be used to create, or enable the creation or redistribution of,
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+ * unlawful or unlicensed copies of an Apple operating system, or to
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+ * circumvent, violate, or enable the circumvention or violation of, any
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+ * terms of an Apple operating system software license agreement.
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+ *
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+ * Please obtain a copy of the License at
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+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
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+ *
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+ * The Original Code and all software distributed under the License are
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+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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+ * Please see the License for the specific language governing rights and
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+ * limitations under the License.
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+ *
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+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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+ */
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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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+ * 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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+ * @(#)ip.h 8.2 (Berkeley) 6/1/94
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+ * $FreeBSD: src/sys/netinet/ip.h,v 1.17 1999/12/22 19:13:20 shin Exp $
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+ */
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+
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+ #ifndef _NETINET_IP_H_
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+ #define _NETINET_IP_H_
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+ #include <sys/appleapiopts.h>
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+ #include <sys/types.h> /* XXX temporary hack to get u_ types */
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+
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+ #include <netinet/in.h>
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+ #include <netinet/in_systm.h>
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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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+ #define IPVERSION 4
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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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+ #ifdef _IP_VHL
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+ u_char ip_vhl ; /* version << 4 | header length >> 2 */
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+ #else
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+ #if BYTE_ORDER == LITTLE_ENDIAN
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+ u_int 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_int ip_v :4 , /* version */
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+ ip_hl :4 ; /* header length */
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+ #endif
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+ #endif /* not _IP_VHL */
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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_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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+ 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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+
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+ #ifdef _IP_VHL
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+ #define IP_MAKE_VHL (v , hl ) ((uint8_t)((v) << 4 | (hl)))
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+ #define IP_VHL_HL (vhl ) ((vhl) & 0x0f)
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+ #define IP_VHL_V (vhl ) ((vhl) >> 4)
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+ #define IP_VHL_BORING 0x45
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+ #endif
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+
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+ #define IP_MAXPACKET 65535 /* maximum packet size */
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+
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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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+ #define IPTOS_MINCOST 0x02
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+ #if 1
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+ /* ECN RFC3168 obsoletes RFC2481, and these will be deprecated soon. */
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+ #define IPTOS_CE 0x01
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+ #define IPTOS_ECT 0x02
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+ #endif
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+
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+ #define IPTOS_DSCP_SHIFT 2
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+
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+ /*
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+ * ECN (Explicit Congestion Notification) codepoints in RFC3168
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+ * mapped to the lower 2 bits of the TOS field.
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+ */
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+ #define IPTOS_ECN_NOTECT 0x00 /* not-ECT */
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+ #define IPTOS_ECN_ECT1 0x01 /* ECN-capable transport (1) */
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+ #define IPTOS_ECN_ECT0 0x02 /* ECN-capable transport (0) */
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+ #define IPTOS_ECN_CE 0x03 /* congestion experienced */
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+ #define IPTOS_ECN_MASK 0x03 /* ECN field mask */
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+
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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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+ /*
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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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+
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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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+
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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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+
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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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+ #define IPOPT_RA 148 /* router alert */
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+
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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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+ /*
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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_int 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_int 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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+ #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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+
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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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+ /*
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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 30 /* time to live for frags (seconds) */
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+ #define IPTTLDEC 1 /* subtracted when forwarding */
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+
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+ #define IP_MSS 576 /* default maximum segment size */
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+
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+ #endif
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