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/*
* Copyright 2006, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
*
* Fundamental constants relating to IP Protocol
*
* $Id: bcmip.h,v 1.1.1.3 2006/02/27 03:43:16 honor Exp $
*/
#ifndef _bcmip_h_
#define _bcmip_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_TCP 0x6 /* TCP protocol */
#define IP_PROT_UDP 0x11 /* UDP 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_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 */
/* 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_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_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_PROT(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])
#define IPV4_ADDR_STR_LEN 16 /* Max IP address length in string format */
/* 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_TOS(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)
#endif /* _bcmip_h_ */
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