1 files changed, 136 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..352209e9
--- /dev/null
+++ b/src/VBox/Runtime/common/checksum/ipv6.cpp
@@ -0,0 +1,136 @@
+/* $Id: ipv6.cpp $ */
+/** @file
+ * IPRT - IPv6 Checksum calculation and validation.
+ */
+
+/*
+ * Copyright (C) 2008-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   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);
+