diff options
Diffstat (limited to 'src/VBox/NetworkServices/NetLib/VBoxNetIntIf.cpp')
-rw-r--r-- | src/VBox/NetworkServices/NetLib/VBoxNetIntIf.cpp | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/VBox/NetworkServices/NetLib/VBoxNetIntIf.cpp b/src/VBox/NetworkServices/NetLib/VBoxNetIntIf.cpp new file mode 100644 index 00000000..eaa02dfc --- /dev/null +++ b/src/VBox/NetworkServices/NetLib/VBoxNetIntIf.cpp @@ -0,0 +1,150 @@ +/* $Id: VBoxNetIntIf.cpp $ */ +/** @file + * VBoxNetIntIf - IntNet Interface Client Routines. + */ + +/* + * Copyright (C) 2009-2023 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>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define LOG_GROUP LOG_GROUP_DEFAULT +#include "VBoxNetLib.h" +#include <VBox/intnet.h> +#include <VBox/intnetinline.h> +#include <VBox/sup.h> +#include <VBox/vmm/vmm.h> +#include <iprt/errcore.h> +#include <VBox/log.h> + +#include <iprt/string.h> + + + +/** + * Flushes the send buffer. + * + * @returns VBox status code. + * @param pSession The support driver session. + * @param hIf The interface handle to flush. + */ +int VBoxNetIntIfFlush(PSUPDRVSESSION pSession, INTNETIFHANDLE hIf) +{ + INTNETIFSENDREQ SendReq; + SendReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC; + SendReq.Hdr.cbReq = sizeof(SendReq); + SendReq.pSession = pSession; + SendReq.hIf = hIf; + return SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_INTNET_IF_SEND, 0, &SendReq.Hdr); +} + + +/** + * Copys the SG segments into the specified fram. + * + * @param pvFrame The frame buffer. + * @param cSegs The number of segments. + * @param paSegs The segments. + */ +static void vboxnetIntIfCopySG(void *pvFrame, size_t cSegs, PCINTNETSEG paSegs) +{ + uint8_t *pbDst = (uint8_t *)pvFrame; + for (size_t iSeg = 0; iSeg < cSegs; iSeg++) + { + memcpy(pbDst, paSegs[iSeg].pv, paSegs[iSeg].cb); + pbDst += paSegs[iSeg].cb; + } +} + + +/** + * Writes a frame packet to the buffer. + * + * @returns VBox status code. + * @param pBuf The buffer. + * @param pRingBuf The ring buffer to read from. + * @param cSegs The number of segments. + * @param paSegs The segments. + */ +int VBoxNetIntIfRingWriteFrame(PINTNETBUF pBuf, PINTNETRINGBUF pRingBuf, size_t cSegs, PCINTNETSEG paSegs) +{ + RT_NOREF(pBuf); + + /* + * Validate input. + */ + AssertPtr(pBuf); + AssertPtr(pRingBuf); + AssertPtr(paSegs); + Assert(cSegs > 0); + + /* + * Calc frame size. + */ + uint32_t cbFrame = 0; + for (size_t iSeg = 0; iSeg < cSegs; iSeg++) + cbFrame += paSegs[iSeg].cb; + Assert(cbFrame >= sizeof(RTMAC) * 2); + + /* + * Allocate a frame, copy the data and commit it. + */ + PINTNETHDR pHdr = NULL; + void *pvFrame = NULL; + int rc = IntNetRingAllocateFrame(pRingBuf, cbFrame, &pHdr, &pvFrame); + if (RT_SUCCESS(rc)) + { + vboxnetIntIfCopySG(pvFrame, cSegs, paSegs); + IntNetRingCommitFrame(pRingBuf, pHdr); + return VINF_SUCCESS; + } + + return rc; +} + + +/** + * Sends a frame + * + * @returns VBox status code. + * @param pSession The support driver session. + * @param hIf The interface handle. + * @param pBuf The interface buffer. + * @param cSegs The number of segments. + * @param paSegs The segments. + * @param fFlush Whether to flush the write. + */ +int VBoxNetIntIfSend(PSUPDRVSESSION pSession, INTNETIFHANDLE hIf, PINTNETBUF pBuf, + size_t cSegs, PCINTNETSEG paSegs, bool fFlush) +{ + int rc = VBoxNetIntIfRingWriteFrame(pBuf, &pBuf->Send, cSegs, paSegs); + if (rc == VERR_BUFFER_OVERFLOW) + { + VBoxNetIntIfFlush(pSession, hIf); + rc = VBoxNetIntIfRingWriteFrame(pBuf, &pBuf->Send, cSegs, paSegs); + } + if (RT_SUCCESS(rc) && fFlush) + rc = VBoxNetIntIfFlush(pSession, hIf); + return rc; +} |