third_party/tcplp/bsdtcp/ip6.h - third_party/openthread - Git at Google

 /*	$FreeBSD$	*/
 /*	$KAME: ip6.h,v 1.18 2001/03/29 05:34:30 itojun Exp $	*/

 /*-
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the project nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 /*-
  * Copyright (c) 1982, 1986, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
  *	@(#)ip.h	8.1 (Berkeley) 6/10/93
  */

 #ifndef TCPLP_NETINET_IP6_H_
 #define TCPLP_NETINET_IP6_H_

 #include "types.h"

 /* samkumar: Copied from netinet/in6.h */
 struct in6_addr {
 	union {
 		uint8_t		__u6_addr8[16];
 		uint16_t	__u6_addr16[8];
 		uint32_t	__u6_addr32[4];
 	} __u6_addr;			/* 128-bit IP6 address */
 } __attribute__((packed)); // added this to allow unaligned access
 #define s6_addr   __u6_addr.__u6_addr8

 struct sockaddr_in6 {
 	uint8_t		sin6_len;	/* length of this struct */
 	int			sin6_family;	/* AF_INET6 */
 	uint16_t	sin6_port;	/* Transport layer port # */
 	uint32_t	sin6_flowinfo;	/* IP6 flow information */
 	struct in6_addr	sin6_addr;	/* IP6 address */
 	uint32_t	sin6_scope_id;	/* scope zone index */
 };

 /*
  * Definition for internet protocol version 6.
  * RFC 2460
  */
 struct ip6_hdr {
 	union {
 		struct ip6_hdrctl {
 			u_int32_t ip6_un1_flow;	/* 20 bits of flow-ID */
 			u_int16_t ip6_un1_plen;	/* payload length */
 			u_int8_t  ip6_un1_nxt;	/* next header */
 			u_int8_t  ip6_un1_hlim;	/* hop limit */
 		} ip6_un1;
 		u_int8_t ip6_un2_vfc;	/* 4 bits version, top 4 bits class */
 	} ip6_ctlun;
 	struct in6_addr ip6_src;	/* source address */
 	struct in6_addr ip6_dst;	/* destination address */
 } __attribute__((packed));

 #define ip6_vfc		ip6_ctlun.ip6_un2_vfc
 #define ip6_flow	ip6_ctlun.ip6_un1.ip6_un1_flow
 #define ip6_plen	ip6_ctlun.ip6_un1.ip6_un1_plen
 #define ip6_nxt		ip6_ctlun.ip6_un1.ip6_un1_nxt
 #define ip6_hlim	ip6_ctlun.ip6_un1.ip6_un1_hlim
 #define ip6_hops	ip6_ctlun.ip6_un1.ip6_un1_hlim

 #define IPV6_VERSION		0x60
 #define IPV6_VERSION_MASK	0xf0

 /* samkumar: Removed #if guard since ECN is enabled in TCPlp. */
 /* ECN bits proposed by Sally Floyd */
 #define IP6TOS_CE		0x01	/* congestion experienced */
 #define IP6TOS_ECT		0x02	/* ECN-capable transport */

 // samkumar: Copied from in6.h
 #define IN6_ARE_ADDR_EQUAL(a, b)			\
     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)

 /* Multicast */
 #define IN6_IS_ADDR_MULTICAST(a)	((a)->s6_addr[0] == 0xff)

 /*
  * Unspecified
  */
 #define IN6_IS_ADDR_UNSPECIFIED(a)	\
 	((a)->__u6_addr.__u6_addr32[0] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[1] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[2] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[3] == 0)

 /*
  * Loopback
  */
 #define IN6_IS_ADDR_LOOPBACK(a)		\
 	((a)->__u6_addr.__u6_addr32[0] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[1] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[2] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[3] == ntohl(1))

 /*
  * Unicast Scope
  * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
  */
 #define IN6_IS_ADDR_LINKLOCAL(a)	\
 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
 #define IN6_IS_ADDR_SITELOCAL(a)	\
 	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))

 /*
  * Mapped
  */

 #define IN6_IS_ADDR_V4MAPPED(a)		      \
 	((a)->__u6_addr.__u6_addr32[0] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[1] == 0 &&	\
 	 (a)->__u6_addr.__u6_addr32[2] == ntohl(0x0000ffff))

 #endif /* not _NETINET_IP6_H_ */
	/* $FreeBSD$ */
	/* $KAME: ip6.h,v 1.18 2001/03/29 05:34:30 itojun Exp $ */

	/*-
	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. Neither the name of the project nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	/*-
	* Copyright (c) 1982, 1986, 1993
	* The Regents of the University of California. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 4. Neither the name of the University nor the names of its contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*
	* @(#)ip.h 8.1 (Berkeley) 6/10/93
	*/

	#ifndef TCPLP_NETINET_IP6_H_
	#define TCPLP_NETINET_IP6_H_

	#include "types.h"

	/* samkumar: Copied from netinet/in6.h */
	struct in6_addr {
	union {
	uint8_t __u6_addr8[16];
	uint16_t __u6_addr16[8];
	uint32_t __u6_addr32[4];
	} __u6_addr; /* 128-bit IP6 address */
	} __attribute__((packed)); // added this to allow unaligned access
	#define s6_addr __u6_addr.__u6_addr8

	struct sockaddr_in6 {
	uint8_t sin6_len; /* length of this struct */
	int sin6_family; /* AF_INET6 */
	uint16_t sin6_port; /* Transport layer port # */
	uint32_t sin6_flowinfo; /* IP6 flow information */
	struct in6_addr sin6_addr; /* IP6 address */
	uint32_t sin6_scope_id; /* scope zone index */
	};

	/*
	* Definition for internet protocol version 6.
	* RFC 2460
	*/
	struct ip6_hdr {
	union {
	struct ip6_hdrctl {
	u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */
	u_int16_t ip6_un1_plen; /* payload length */
	u_int8_t ip6_un1_nxt; /* next header */
	u_int8_t ip6_un1_hlim; /* hop limit */
	} ip6_un1;
	u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
	} ip6_ctlun;
	struct in6_addr ip6_src; /* source address */
	struct in6_addr ip6_dst; /* destination address */
	} __attribute__((packed));

	#define ip6_vfc ip6_ctlun.ip6_un2_vfc
	#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
	#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
	#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
	#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
	#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim

	#define IPV6_VERSION 0x60
	#define IPV6_VERSION_MASK 0xf0

	/* samkumar: Removed #if guard since ECN is enabled in TCPlp. */
	/* ECN bits proposed by Sally Floyd */
	#define IP6TOS_CE 0x01 /* congestion experienced */
	#define IP6TOS_ECT 0x02 /* ECN-capable transport */

	// samkumar: Copied from in6.h
	#define IN6_ARE_ADDR_EQUAL(a, b) \
	(memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)

	/* Multicast */
	#define IN6_IS_ADDR_MULTICAST(a) ((a)->s6_addr[0] == 0xff)

	/*
	* Unspecified
	*/
	#define IN6_IS_ADDR_UNSPECIFIED(a) \
	((a)->__u6_addr.__u6_addr32[0] == 0 && \
	(a)->__u6_addr.__u6_addr32[1] == 0 && \
	(a)->__u6_addr.__u6_addr32[2] == 0 && \
	(a)->__u6_addr.__u6_addr32[3] == 0)

	/*
	* Loopback
	*/
	#define IN6_IS_ADDR_LOOPBACK(a) \
	((a)->__u6_addr.__u6_addr32[0] == 0 && \
	(a)->__u6_addr.__u6_addr32[1] == 0 && \
	(a)->__u6_addr.__u6_addr32[2] == 0 && \
	(a)->__u6_addr.__u6_addr32[3] == ntohl(1))

	/*
	* Unicast Scope
	* Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
	*/
	#define IN6_IS_ADDR_LINKLOCAL(a) \
	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
	#define IN6_IS_ADDR_SITELOCAL(a) \
	(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))

	/*
	* Mapped
	*/

	#define IN6_IS_ADDR_V4MAPPED(a) \
	((a)->__u6_addr.__u6_addr32[0] == 0 && \
	(a)->__u6_addr.__u6_addr32[1] == 0 && \
	(a)->__u6_addr.__u6_addr32[2] == ntohl(0x0000ffff))

	#endif /* not _NETINET_IP6_H_ */