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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@2480 3c298f89-4303-0410-b956-a3cf2f4a3e73
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/*
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* Copyright 2005, Broadcom Corporation
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* All Rights Reserved.
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*
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* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
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* the contents of this file may not be disclosed to third parties, copied
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* or duplicated in any form, in whole or in part, without the prior
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* written permission of Broadcom Corporation.
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*
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* Fundamental constants relating to IP Protocol
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*
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* $Id$
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*/
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#ifndef _bcmip_h_
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#define _bcmip_h_
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/* IP header */
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#define IPV4_VERIHL_OFFSET 0 /* version and ihl byte offset */
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#define IPV4_TOS_OFFSET 1 /* TOS offset */
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#define IPV4_PROT_OFFSET 9 /* protocol type offset */
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#define IPV4_CHKSUM_OFFSET 10 /* IP header checksum offset */
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#define IPV4_SRC_IP_OFFSET 12 /* src IP addr offset */
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#define IPV4_DEST_IP_OFFSET 16 /* dest IP addr offset */
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#define IPV4_VER_MASK 0xf0
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#define IPV4_IHL_MASK 0x0f
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#define IPV4_PROT_UDP 17 /* UDP protocol type */
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#define IPV4_ADDR_LEN 4 /* IP v4 address length */
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#define IPV4_VER_NUM 0x40 /* IP v4 version number */
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/* NULL IP address check */
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#define IPV4_ISNULLADDR(a) ((((uint8 *)(a))[0] + ((uint8 *)(a))[1] + \
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((uint8 *)(a))[2] + ((uint8 *)(a))[3]) == 0)
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#define IPV4_ADDR_STR_LEN 16
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#endif /* #ifndef _bcmip_h_ */
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