diff options
Diffstat (limited to 'src/VBox/Runtime/common/checksum/ipv6.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/checksum/ipv6.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/checksum/ipv6.cpp b/src/VBox/Runtime/common/checksum/ipv6.cpp new file mode 100644 index 00000000..597813ec --- /dev/null +++ b/src/VBox/Runtime/common/checksum/ipv6.cpp @@ -0,0 +1,126 @@ +/* $Id: ipv6.cpp $ */ +/** @file + * IPRT - IPv6 Checksum calculation and validation. + */ + +/* + * Copyright (C) 2008-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/net.h> +#include "internal/iprt.h" + +#include <iprt/asm.h> +#include <iprt/assert.h> + + +/** + * @copydoc RTNetIPv6PseudoChecksumBits + */ +DECLINLINE(uint32_t) rtNetIPv6PseudoChecksumBits(PCRTNETADDRIPV6 pSrcAddr, PCRTNETADDRIPV6 pDstAddr, + uint8_t bProtocol, uint32_t cbPkt) +{ + uint32_t u32Sum = pSrcAddr->au16[0] + + pSrcAddr->au16[1] + + pSrcAddr->au16[2] + + pSrcAddr->au16[3] + + pSrcAddr->au16[4] + + pSrcAddr->au16[5] + + pSrcAddr->au16[6] + + pSrcAddr->au16[7] + + pDstAddr->au16[0] + + pDstAddr->au16[1] + + pDstAddr->au16[2] + + pDstAddr->au16[3] + + pDstAddr->au16[4] + + pDstAddr->au16[5] + + pDstAddr->au16[6] + + pDstAddr->au16[7] + + RT_H2BE_U16(RT_HIWORD(cbPkt)) + + RT_H2BE_U16(RT_LOWORD(cbPkt)) + + 0 + + RT_H2BE_U16(RT_MAKE_U16(bProtocol, 0)); + return u32Sum; +} + + +/** + * Calculates the checksum of a pseudo header given an IPv6 header, ASSUMING + * that there are no headers between the IPv6 header and the upper layer header. + * + * Use this method with create care! In most cases you should be using + * RTNetIPv6PseudoChecksumEx. + * + * @returns 32-bit intermediary checksum value. + * @param pIpHdr The IPv6 header (network endian (big)). + */ +RTDECL(uint32_t) RTNetIPv6PseudoChecksum(PCRTNETIPV6 pIpHdr) +{ + return rtNetIPv6PseudoChecksumBits(&pIpHdr->ip6_src, &pIpHdr->ip6_dst, + pIpHdr->ip6_nxt, RT_N2H_U16(pIpHdr->ip6_plen)); +} +RT_EXPORT_SYMBOL(RTNetIPv6PseudoChecksum); + + +/** + * Calculates the checksum of a pseudo header given an IPv6 header. + * + * @returns 32-bit intermediary checksum value. + * @param pIpHdr The IPv6 header (network endian (big)). + * @param bProtocol The protocol number. This can be the same as the + * ip6_nxt field, but doesn't need to be. + * @param cbPkt The packet size (host endian of course). This can + * be the same as the ip6_plen field, but as with @a + * bProtocol it won't be when extension headers are + * present. For UDP this will be uh_ulen converted to + * host endian. + */ +RTDECL(uint32_t) RTNetIPv6PseudoChecksumEx(PCRTNETIPV6 pIpHdr, uint8_t bProtocol, uint16_t cbPkt) +{ + return rtNetIPv6PseudoChecksumBits(&pIpHdr->ip6_src, &pIpHdr->ip6_dst, bProtocol, cbPkt); +} +RT_EXPORT_SYMBOL(RTNetIPv6PseudoChecksumEx); + + +/** + * Calculates the checksum of a pseudo header given the individual components. + * + * @returns 32-bit intermediary checksum value. + * @param pSrcAddr Pointer to the source address in network endian. + * @param pDstAddr Pointer to the destination address in network endian. + * @param bProtocol The protocol number. This can be the same as the + * ip6_nxt field, but doesn't need to be. + * @param cbPkt The packet size (host endian of course). This can + * be the same as the ip6_plen field, but as with @a + * bProtocol it won't be when extension headers are + * present. For UDP this will be uh_ulen converted to + * host endian. + */ +RTDECL(uint32_t) RTNetIPv6PseudoChecksumBits(PCRTNETADDRIPV6 pSrcAddr, PCRTNETADDRIPV6 pDstAddr, + uint8_t bProtocol, uint16_t cbPkt) +{ + return rtNetIPv6PseudoChecksumBits(pSrcAddr, pDstAddr, bProtocol, cbPkt); +} +RT_EXPORT_SYMBOL(RTNetIPv6PseudoChecksumBits); + |