bcmdhd.101.10.361.x/include/bcmip.h - manifest_repos/dhd-driver - Git at Google

 /*
  * Fundamental constants relating to IP Protocol
  *
  * Copyright (C) 2020, Broadcom.
  *
  *      Unless you and Broadcom execute a separate written software license
  * agreement governing use of this software, this software is licensed to you
  * under the terms of the GNU General Public License version 2 (the "GPL"),
  * available at http://www.broadcom.com/licenses/GPLv2.php, with the
  * following added to such license:
  *
  *      As a special exception, the copyright holders of this software give you
  * permission to link this software with independent modules, and to copy and
  * distribute the resulting executable under terms of your choice, provided that
  * you also meet, for each linked independent module, the terms and conditions of
  * the license of that module.  An independent module is a module which is not
  * derived from this software.  The special exception does not apply to any
  * modifications of the software.
  *
  *
  * <<Broadcom-WL-IPTag/Dual:>>
  */

 #ifndef _bcmip_h_
 #define _bcmip_h_

 #ifndef _TYPEDEFS_H_
 #include <typedefs.h>
 #endif

 /* This marks the start of a packed structure section. */
 #include <packed_section_start.h>

 /* IPV4 and IPV6 common */
 #define IP_VER_OFFSET		0x0	/* offset to version field */
 #define IP_VER_MASK		0xf0	/* version mask */
 #define IP_VER_SHIFT		4	/* version shift */
 #define IP_VER_4		4	/* version number for IPV4 */
 #define IP_VER_6		6	/* version number for IPV6 */

 #define IP_VER(ip_body) \
 	((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT)

 #define IP_PROT_ICMP		0x1	/* ICMP protocol */
 #define IP_PROT_IGMP		0x2	/* IGMP protocol */
 #define IP_PROT_TCP		0x6	/* TCP protocol */
 #define IP_PROT_UDP		0x11	/* UDP protocol type */
 #define IP_PROT_GRE		0x2f	/* GRE protocol type */
 #define IP_PROT_ICMP6           0x3a    /* ICMPv6 protocol type */

 /* IPV4 field offsets */
 #define IPV4_VER_HL_OFFSET      0       /* version and ihl byte offset */
 #define IPV4_TOS_OFFSET         1       /* type of service offset */
 #define IPV4_PKTLEN_OFFSET      2       /* packet length offset */
 #define IPV4_PKTFLAG_OFFSET     6       /* more-frag,dont-frag flag offset */
 #define IPV4_PROT_OFFSET        9       /* protocol type offset */
 #define IPV4_CHKSUM_OFFSET      10      /* IP header checksum offset */
 #define IPV4_SRC_IP_OFFSET      12      /* src IP addr offset */
 #define IPV4_DEST_IP_OFFSET     16      /* dest IP addr offset */
 #define IPV4_OPTIONS_OFFSET     20      /* IP options offset */
 #define IPV4_MIN_HEADER_LEN     20      /* Minimum size for an IP header (no options) */

 /* IPV4 field decodes */
 #define IPV4_VER_MASK		0xf0	/* IPV4 version mask */
 #define IPV4_VER_SHIFT		4	/* IPV4 version shift */

 #define IPV4_HLEN_MASK		0x0f	/* IPV4 header length mask */
 #define IPV4_HLEN(ipv4_body)	(4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK))

 #define IPV4_HLEN_MIN		(4 * 5)	/* IPV4 header minimum length */

 #define IPV4_ADDR_LEN		4	/* IPV4 address length */

 #define IPV4_ADDR_NULL(a)	((((uint8 *)(a))[0] | ((uint8 *)(a))[1] | \
 				  ((uint8 *)(a))[2] | ((uint8 *)(a))[3]) == 0)

 #define IPV4_ADDR_BCAST(a)	((((uint8 *)(a))[0] & ((uint8 *)(a))[1] & \
 				  ((uint8 *)(a))[2] & ((uint8 *)(a))[3]) == 0xff)

 #define	IPV4_TOS_DSCP_MASK	0xfc	/* DiffServ codepoint mask */
 #define	IPV4_TOS_DSCP_SHIFT	2	/* DiffServ codepoint shift */

 #define	IPV4_TOS(ipv4_body)	(((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET])

 #define	IPV4_TOS_PREC_MASK	0xe0	/* Historical precedence mask */
 #define	IPV4_TOS_PREC_SHIFT	5	/* Historical precedence shift */

 #define IPV4_TOS_LOWDELAY	0x10	/* Lowest delay requested */
 #define IPV4_TOS_THROUGHPUT	0x8	/* Best throughput requested */
 #define IPV4_TOS_RELIABILITY	0x4	/* Most reliable delivery requested */

 #define IPV4_TOS_ROUTINE        0
 #define IPV4_TOS_PRIORITY       1
 #define IPV4_TOS_IMMEDIATE      2
 #define IPV4_TOS_FLASH          3
 #define IPV4_TOS_FLASHOVERRIDE  4
 #define IPV4_TOS_CRITICAL       5
 #define IPV4_TOS_INETWORK_CTRL  6
 #define IPV4_TOS_NETWORK_CTRL   7

 #define IPV4_PROT(ipv4_body)	(((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])

 #define IPV4_FRAG_RESV		0x8000	/* Reserved */
 #define IPV4_FRAG_DONT		0x4000	/* Don't fragment */
 #define IPV4_FRAG_MORE		0x2000	/* More fragments */
 #define IPV4_FRAG_OFFSET_MASK	0x1fff	/* Fragment offset */

 #define IPV4_ADDR_STR_LEN	16	/* Max IP address length in string format */

 /* IPV4 packet formats */
 BWL_PRE_PACKED_STRUCT struct ipv4_addr {
 	uint8	addr[IPV4_ADDR_LEN];
 } BWL_POST_PACKED_STRUCT;

 BWL_PRE_PACKED_STRUCT struct ipv4_hdr {
 	uint8	version_ihl;		/* Version and Internet Header Length */
 	uint8	tos;			/* Type Of Service */
 	uint16	tot_len;		/* Number of bytes in packet (max 65535) */
 	uint16	id;
 	uint16	frag;			/* 3 flag bits and fragment offset */
 	uint8	ttl;			/* Time To Live */
 	uint8	prot;			/* Protocol */
 	uint16	hdr_chksum;		/* IP header checksum */
 	uint8	src_ip[IPV4_ADDR_LEN];	/* Source IP Address */
 	uint8	dst_ip[IPV4_ADDR_LEN];	/* Destination IP Address */
 } BWL_POST_PACKED_STRUCT;

 /* IPV6 field offsets */
 #define IPV6_PAYLOAD_LEN_OFFSET	4	/* payload length offset */
 #define IPV6_NEXT_HDR_OFFSET	6	/* next header/protocol offset */
 #define IPV6_HOP_LIMIT_OFFSET	7	/* hop limit offset */
 #define IPV6_SRC_IP_OFFSET	8	/* src IP addr offset */
 #define IPV6_DEST_IP_OFFSET	24	/* dst IP addr offset */

 /* IPV6 field decodes */
 #define IPV6_TRAFFIC_CLASS(ipv6_body) \
 	(((((uint8 *)(ipv6_body))[0] & 0x0f) << 4) | \
 	 ((((uint8 *)(ipv6_body))[1] & 0xf0) >> 4))

 #define IPV6_FLOW_LABEL(ipv6_body) \
 	(((((uint8 *)(ipv6_body))[1] & 0x0f) << 16) | \
 	 (((uint8 *)(ipv6_body))[2] << 8) | \
 	 (((uint8 *)(ipv6_body))[3]))

 #define IPV6_PAYLOAD_LEN(ipv6_body) \
 	((((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 0] << 8) | \
 	 ((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 1])

 #define IPV6_NEXT_HDR(ipv6_body) \
 	(((uint8 *)(ipv6_body))[IPV6_NEXT_HDR_OFFSET])

 #define IPV6_PROT(ipv6_body)	IPV6_NEXT_HDR(ipv6_body)

 #define IPV6_ADDR_LEN		16	/* IPV6 address length */

 /* IPV4 TOS or IPV6 Traffic Classifier or 0 */
 #define IP_TOS46(ip_body) \
 	(IP_VER(ip_body) == IP_VER_4 ? IPV4_TOS(ip_body) : \
 	 IP_VER(ip_body) == IP_VER_6 ? IPV6_TRAFFIC_CLASS(ip_body) : 0)

 #define IP_DSCP46(ip_body) (IP_TOS46(ip_body) >> IPV4_TOS_DSCP_SHIFT);

 /* IPV4 or IPV6 Protocol Classifier or 0 */
 #define IP_PROT46(ip_body) \
 	(IP_VER(ip_body) == IP_VER_4 ? IPV4_PROT(ip_body) : \
 	 IP_VER(ip_body) == IP_VER_6 ? IPV6_PROT(ip_body) : 0)

 /* IPV6 extension headers (options) */
 #define IPV6_EXTHDR_HOP		0
 #define IPV6_EXTHDR_ROUTING	43
 #define IPV6_EXTHDR_FRAGMENT	44
 #define IPV6_EXTHDR_AUTH	51
 #define IPV6_EXTHDR_NONE	59
 #define IPV6_EXTHDR_DEST	60

 #define IPV6_EXTHDR(prot)	(((prot) == IPV6_EXTHDR_HOP) || \
 	                         ((prot) == IPV6_EXTHDR_ROUTING) || \
 	                         ((prot) == IPV6_EXTHDR_FRAGMENT) || \
 	                         ((prot) == IPV6_EXTHDR_AUTH) || \
 	                         ((prot) == IPV6_EXTHDR_NONE) || \
 	                         ((prot) == IPV6_EXTHDR_DEST))

 #define IPV6_MIN_HLEN 		40

 #define IPV6_EXTHDR_LEN(eh)	((((struct ipv6_exthdr *)(eh))->hdrlen + 1) << 3)

 BWL_PRE_PACKED_STRUCT struct ipv6_exthdr {
 	uint8	nexthdr;
 	uint8	hdrlen;
 } BWL_POST_PACKED_STRUCT;

 BWL_PRE_PACKED_STRUCT struct ipv6_exthdr_frag {
 	uint8	nexthdr;
 	uint8	rsvd;
 	uint16	frag_off;
 	uint32	ident;
 } BWL_POST_PACKED_STRUCT;

 /* deprecated and replaced by ipv6_exthdr_len_check */
 static INLINE int32
 ipv6_exthdr_len(uint8 *h, uint8 *proto)
 {
 	uint16 len = 0, hlen;
 	struct ipv6_exthdr *eh = (struct ipv6_exthdr *)h;

 	while (IPV6_EXTHDR(eh->nexthdr)) {
 		if (eh->nexthdr == IPV6_EXTHDR_NONE)
 			return -1;
 		else if (eh->nexthdr == IPV6_EXTHDR_FRAGMENT)
 			hlen = 8U;
 		else if (eh->nexthdr == IPV6_EXTHDR_AUTH)
 			hlen = (uint16)((eh->hdrlen + 2U) << 2U);
 		else
 			hlen = (uint16)IPV6_EXTHDR_LEN(eh);

 		len += hlen;
 		eh = (struct ipv6_exthdr *)(h + len);
 	}

 	*proto = eh->nexthdr;
 	return len;
 }

 /* determine length of exthdr with length checking */
 static INLINE int32
 ipv6_exthdr_len_check(uint8 *h, uint16 plen, uint8 *proto)
 {
 	uint16 len = 0, hlen;
 	struct ipv6_exthdr *eh = (struct ipv6_exthdr *)h;

 	/* must have at least one exthdr */
 	if (plen < sizeof(struct ipv6_exthdr)) {
 		return -1;
 	}

 	/* length check before accessing next exthdr */
 	while ((plen >= len + sizeof(struct ipv6_exthdr)) && IPV6_EXTHDR(eh->nexthdr)) {
 		if (eh->nexthdr == IPV6_EXTHDR_NONE) {
 			return -1;
 		} else if (eh->nexthdr == IPV6_EXTHDR_FRAGMENT) {
 			hlen = 8U;
 		} else if (eh->nexthdr == IPV6_EXTHDR_AUTH) {
 			hlen = (uint16)((eh->hdrlen + 2U) << 2U);
 		} else {
 			hlen = (uint16)IPV6_EXTHDR_LEN(eh);
 		}

 		/* check exthdr length */
 		if (plen < len + hlen) {
 			/* invalid exthdr */
 			return -1;
 		}
 		len += hlen;
 		eh = (struct ipv6_exthdr *)(h + len);
 	}

 	/* length check before accessing next exthdr */
 	if (plen >= len + sizeof(struct ipv6_exthdr)) {
 		*proto = eh->nexthdr;
 	} else {
 		*proto = 0;
 	}
 	return len;
 }
 #define IPV4_ISMULTI(a) (((a) & 0xf0000000) == 0xe0000000)

 #define IPV4_MCAST_TO_ETHER_MCAST(ipv4, ether) \
 { \
 	ether[0] = 0x01; \
 	ether[1] = 0x00; \
 	ether[2] = 0x5E; \
 	ether[3] = (ipv4 & 0x7f0000) >> 16; \
 	ether[4] = (ipv4 & 0xff00) >> 8; \
 	ether[5] = (ipv4 & 0xff); \
 }

 /* This marks the end of a packed structure section. */
 #include <packed_section_end.h>

 #define IPV4_ADDR_STR "%d.%d.%d.%d"
 #define IPV4_ADDR_TO_STR(addr)	((uint32)addr & 0xff000000) >> 24, \
 								((uint32)addr & 0x00ff0000) >> 16, \
 								((uint32)addr & 0x0000ff00) >> 8, \
 								((uint32)addr & 0x000000ff)

 #endif	/* _bcmip_h_ */
	/*
	* Fundamental constants relating to IP Protocol
	*
	* Copyright (C) 2020, Broadcom.
	*
	* Unless you and Broadcom execute a separate written software license
	* agreement governing use of this software, this software is licensed to you
	* under the terms of the GNU General Public License version 2 (the "GPL"),
	* available at http://www.broadcom.com/licenses/GPLv2.php, with the
	* following added to such license:
	*
	* As a special exception, the copyright holders of this software give you
	* permission to link this software with independent modules, and to copy and
	* distribute the resulting executable under terms of your choice, provided that
	* you also meet, for each linked independent module, the terms and conditions of
	* the license of that module. An independent module is a module which is not
	* derived from this software. The special exception does not apply to any
	* modifications of the software.
	*
	*
	* <<Broadcom-WL-IPTag/Dual:>>
	*/

	#ifndef _bcmip_h_
	#define _bcmip_h_

	#ifndef _TYPEDEFS_H_
	#include <typedefs.h>
	#endif

	/* This marks the start of a packed structure section. */
	#include <packed_section_start.h>

	/* IPV4 and IPV6 common */
	#define IP_VER_OFFSET 0x0 /* offset to version field */
	#define IP_VER_MASK 0xf0 /* version mask */
	#define IP_VER_SHIFT 4 /* version shift */
	#define IP_VER_4 4 /* version number for IPV4 */
	#define IP_VER_6 6 /* version number for IPV6 */

	#define IP_VER(ip_body) \
	((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT)

	#define IP_PROT_ICMP 0x1 /* ICMP protocol */
	#define IP_PROT_IGMP 0x2 /* IGMP protocol */
	#define IP_PROT_TCP 0x6 /* TCP protocol */
	#define IP_PROT_UDP 0x11 /* UDP protocol type */
	#define IP_PROT_GRE 0x2f /* GRE protocol type */
	#define IP_PROT_ICMP6 0x3a /* ICMPv6 protocol type */

	/* IPV4 field offsets */
	#define IPV4_VER_HL_OFFSET 0 /* version and ihl byte offset */
	#define IPV4_TOS_OFFSET 1 /* type of service offset */
	#define IPV4_PKTLEN_OFFSET 2 /* packet length offset */
	#define IPV4_PKTFLAG_OFFSET 6 /* more-frag,dont-frag flag offset */
	#define IPV4_PROT_OFFSET 9 /* protocol type offset */
	#define IPV4_CHKSUM_OFFSET 10 /* IP header checksum offset */
	#define IPV4_SRC_IP_OFFSET 12 /* src IP addr offset */
	#define IPV4_DEST_IP_OFFSET 16 /* dest IP addr offset */
	#define IPV4_OPTIONS_OFFSET 20 /* IP options offset */
	#define IPV4_MIN_HEADER_LEN 20 /* Minimum size for an IP header (no options) */

	/* IPV4 field decodes */
	#define IPV4_VER_MASK 0xf0 /* IPV4 version mask */
	#define IPV4_VER_SHIFT 4 /* IPV4 version shift */

	#define IPV4_HLEN_MASK 0x0f /* IPV4 header length mask */
	#define IPV4_HLEN(ipv4_body) (4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK))

	#define IPV4_HLEN_MIN (4 * 5) /* IPV4 header minimum length */

	#define IPV4_ADDR_LEN 4 /* IPV4 address length */

	#define IPV4_ADDR_NULL(a) ((((uint8 )(a))[0] \| ((uint8 )(a))[1] \| \
	((uint8 )(a))[2] \| ((uint8 )(a))[3]) == 0)

	#define IPV4_ADDR_BCAST(a) ((((uint8 )(a))[0] & ((uint8 )(a))[1] & \
	((uint8 )(a))[2] & ((uint8 )(a))[3]) == 0xff)

	#define IPV4_TOS_DSCP_MASK 0xfc /* DiffServ codepoint mask */
	#define IPV4_TOS_DSCP_SHIFT 2 /* DiffServ codepoint shift */

	#define IPV4_TOS(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET])

	#define IPV4_TOS_PREC_MASK 0xe0 /* Historical precedence mask */
	#define IPV4_TOS_PREC_SHIFT 5 /* Historical precedence shift */

	#define IPV4_TOS_LOWDELAY 0x10 /* Lowest delay requested */
	#define IPV4_TOS_THROUGHPUT 0x8 /* Best throughput requested */
	#define IPV4_TOS_RELIABILITY 0x4 /* Most reliable delivery requested */

	#define IPV4_TOS_ROUTINE 0
	#define IPV4_TOS_PRIORITY 1
	#define IPV4_TOS_IMMEDIATE 2
	#define IPV4_TOS_FLASH 3
	#define IPV4_TOS_FLASHOVERRIDE 4
	#define IPV4_TOS_CRITICAL 5
	#define IPV4_TOS_INETWORK_CTRL 6
	#define IPV4_TOS_NETWORK_CTRL 7

	#define IPV4_PROT(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])

	#define IPV4_FRAG_RESV 0x8000 /* Reserved */
	#define IPV4_FRAG_DONT 0x4000 /* Don't fragment */
	#define IPV4_FRAG_MORE 0x2000 /* More fragments */
	#define IPV4_FRAG_OFFSET_MASK 0x1fff /* Fragment offset */

	#define IPV4_ADDR_STR_LEN 16 /* Max IP address length in string format */

	/* IPV4 packet formats */
	BWL_PRE_PACKED_STRUCT struct ipv4_addr {
	uint8 addr[IPV4_ADDR_LEN];
	} BWL_POST_PACKED_STRUCT;

	BWL_PRE_PACKED_STRUCT struct ipv4_hdr {
	uint8 version_ihl; /* Version and Internet Header Length */
	uint8 tos; /* Type Of Service */
	uint16 tot_len; /* Number of bytes in packet (max 65535) */
	uint16 id;
	uint16 frag; /* 3 flag bits and fragment offset */
	uint8 ttl; /* Time To Live */
	uint8 prot; /* Protocol */
	uint16 hdr_chksum; /* IP header checksum */
	uint8 src_ip[IPV4_ADDR_LEN]; /* Source IP Address */
	uint8 dst_ip[IPV4_ADDR_LEN]; /* Destination IP Address */
	} BWL_POST_PACKED_STRUCT;

	/* IPV6 field offsets */
	#define IPV6_PAYLOAD_LEN_OFFSET 4 /* payload length offset */
	#define IPV6_NEXT_HDR_OFFSET 6 /* next header/protocol offset */
	#define IPV6_HOP_LIMIT_OFFSET 7 /* hop limit offset */
	#define IPV6_SRC_IP_OFFSET 8 /* src IP addr offset */
	#define IPV6_DEST_IP_OFFSET 24 /* dst IP addr offset */

	/* IPV6 field decodes */
	#define IPV6_TRAFFIC_CLASS(ipv6_body) \
	(((((uint8 *)(ipv6_body))[0] & 0x0f) << 4) \| \
	((((uint8 *)(ipv6_body))[1] & 0xf0) >> 4))

	#define IPV6_FLOW_LABEL(ipv6_body) \
	(((((uint8 *)(ipv6_body))[1] & 0x0f) << 16) \| \
	(((uint8 *)(ipv6_body))[2] << 8) \| \
	(((uint8 *)(ipv6_body))[3]))

	#define IPV6_PAYLOAD_LEN(ipv6_body) \
	((((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 0] << 8) \| \
	((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 1])

	#define IPV6_NEXT_HDR(ipv6_body) \
	(((uint8 *)(ipv6_body))[IPV6_NEXT_HDR_OFFSET])

	#define IPV6_PROT(ipv6_body) IPV6_NEXT_HDR(ipv6_body)

	#define IPV6_ADDR_LEN 16 /* IPV6 address length */

	/* IPV4 TOS or IPV6 Traffic Classifier or 0 */
	#define IP_TOS46(ip_body) \
	(IP_VER(ip_body) == IP_VER_4 ? IPV4_TOS(ip_body) : \
	IP_VER(ip_body) == IP_VER_6 ? IPV6_TRAFFIC_CLASS(ip_body) : 0)

	#define IP_DSCP46(ip_body) (IP_TOS46(ip_body) >> IPV4_TOS_DSCP_SHIFT);

	/* IPV4 or IPV6 Protocol Classifier or 0 */
	#define IP_PROT46(ip_body) \
	(IP_VER(ip_body) == IP_VER_4 ? IPV4_PROT(ip_body) : \
	IP_VER(ip_body) == IP_VER_6 ? IPV6_PROT(ip_body) : 0)

	/* IPV6 extension headers (options) */
	#define IPV6_EXTHDR_HOP 0
	#define IPV6_EXTHDR_ROUTING 43
	#define IPV6_EXTHDR_FRAGMENT 44
	#define IPV6_EXTHDR_AUTH 51
	#define IPV6_EXTHDR_NONE 59
	#define IPV6_EXTHDR_DEST 60

	#define IPV6_EXTHDR(prot) (((prot) == IPV6_EXTHDR_HOP) \|\| \
	((prot) == IPV6_EXTHDR_ROUTING) \|\| \
	((prot) == IPV6_EXTHDR_FRAGMENT) \|\| \
	((prot) == IPV6_EXTHDR_AUTH) \|\| \
	((prot) == IPV6_EXTHDR_NONE) \|\| \
	((prot) == IPV6_EXTHDR_DEST))

	#define IPV6_MIN_HLEN 40

	#define IPV6_EXTHDR_LEN(eh) ((((struct ipv6_exthdr *)(eh))->hdrlen + 1) << 3)

	BWL_PRE_PACKED_STRUCT struct ipv6_exthdr {
	uint8 nexthdr;
	uint8 hdrlen;
	} BWL_POST_PACKED_STRUCT;

	BWL_PRE_PACKED_STRUCT struct ipv6_exthdr_frag {
	uint8 nexthdr;
	uint8 rsvd;
	uint16 frag_off;
	uint32 ident;
	} BWL_POST_PACKED_STRUCT;

	/* deprecated and replaced by ipv6_exthdr_len_check */
	static INLINE int32
	ipv6_exthdr_len(uint8 h, uint8 proto)
	{
	uint16 len = 0, hlen;
	struct ipv6_exthdr eh = (struct ipv6_exthdr )h;

	while (IPV6_EXTHDR(eh->nexthdr)) {
	if (eh->nexthdr == IPV6_EXTHDR_NONE)
	return -1;
	else if (eh->nexthdr == IPV6_EXTHDR_FRAGMENT)
	hlen = 8U;
	else if (eh->nexthdr == IPV6_EXTHDR_AUTH)
	hlen = (uint16)((eh->hdrlen + 2U) << 2U);
	else
	hlen = (uint16)IPV6_EXTHDR_LEN(eh);

	len += hlen;
	eh = (struct ipv6_exthdr *)(h + len);
	}

	*proto = eh->nexthdr;
	return len;
	}

	/* determine length of exthdr with length checking */
	static INLINE int32
	ipv6_exthdr_len_check(uint8 h, uint16 plen, uint8 proto)
	{
	uint16 len = 0, hlen;
	struct ipv6_exthdr eh = (struct ipv6_exthdr )h;

	/* must have at least one exthdr */
	if (plen < sizeof(struct ipv6_exthdr)) {
	return -1;
	}

	/* length check before accessing next exthdr */
	while ((plen >= len + sizeof(struct ipv6_exthdr)) && IPV6_EXTHDR(eh->nexthdr)) {
	if (eh->nexthdr == IPV6_EXTHDR_NONE) {
	return -1;
	} else if (eh->nexthdr == IPV6_EXTHDR_FRAGMENT) {
	hlen = 8U;
	} else if (eh->nexthdr == IPV6_EXTHDR_AUTH) {
	hlen = (uint16)((eh->hdrlen + 2U) << 2U);
	} else {
	hlen = (uint16)IPV6_EXTHDR_LEN(eh);
	}

	/* check exthdr length */
	if (plen < len + hlen) {
	/* invalid exthdr */
	return -1;
	}
	len += hlen;
	eh = (struct ipv6_exthdr *)(h + len);
	}

	/* length check before accessing next exthdr */
	if (plen >= len + sizeof(struct ipv6_exthdr)) {
	*proto = eh->nexthdr;
	} else {
	*proto = 0;
	}
	return len;
	}
	#define IPV4_ISMULTI(a) (((a) & 0xf0000000) == 0xe0000000)

	#define IPV4_MCAST_TO_ETHER_MCAST(ipv4, ether) \
	{ \
	ether[0] = 0x01; \
	ether[1] = 0x00; \
	ether[2] = 0x5E; \
	ether[3] = (ipv4 & 0x7f0000) >> 16; \
	ether[4] = (ipv4 & 0xff00) >> 8; \
	ether[5] = (ipv4 & 0xff); \
	}

	/* This marks the end of a packed structure section. */
	#include <packed_section_end.h>

	#define IPV4_ADDR_STR "%d.%d.%d.%d"
	#define IPV4_ADDR_TO_STR(addr) ((uint32)addr & 0xff000000) >> 24, \
	((uint32)addr & 0x00ff0000) >> 16, \
	((uint32)addr & 0x0000ff00) >> 8, \
	((uint32)addr & 0x000000ff)

	#endif /* _bcmip_h_ */