| 1 | /* $Id: VBoxNetIntIf.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * VBoxNetIntIf - IntNet Interface Client Routines.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2009-2019 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 |
|
|---|
| 19 | /*********************************************************************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *********************************************************************************************************************************/
|
|---|
| 22 | #define LOG_GROUP LOG_GROUP_DEFAULT
|
|---|
| 23 | #include "VBoxNetLib.h"
|
|---|
| 24 | #include <VBox/intnet.h>
|
|---|
| 25 | #include <VBox/intnetinline.h>
|
|---|
| 26 | #include <VBox/sup.h>
|
|---|
| 27 | #include <VBox/vmm/vmm.h>
|
|---|
| 28 | #include <iprt/errcore.h>
|
|---|
| 29 | #include <VBox/log.h>
|
|---|
| 30 |
|
|---|
| 31 | #include <iprt/string.h>
|
|---|
| 32 |
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | /**
|
|---|
| 36 | * Flushes the send buffer.
|
|---|
| 37 | *
|
|---|
| 38 | * @returns VBox status code.
|
|---|
| 39 | * @param pSession The support driver session.
|
|---|
| 40 | * @param hIf The interface handle to flush.
|
|---|
| 41 | */
|
|---|
| 42 | int VBoxNetIntIfFlush(PSUPDRVSESSION pSession, INTNETIFHANDLE hIf)
|
|---|
| 43 | {
|
|---|
| 44 | INTNETIFSENDREQ SendReq;
|
|---|
| 45 | SendReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
|
|---|
| 46 | SendReq.Hdr.cbReq = sizeof(SendReq);
|
|---|
| 47 | SendReq.pSession = pSession;
|
|---|
| 48 | SendReq.hIf = hIf;
|
|---|
| 49 | return SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_INTNET_IF_SEND, 0, &SendReq.Hdr);
|
|---|
| 50 | }
|
|---|
| 51 |
|
|---|
| 52 |
|
|---|
| 53 | /**
|
|---|
| 54 | * Copys the SG segments into the specified fram.
|
|---|
| 55 | *
|
|---|
| 56 | * @param pvFrame The frame buffer.
|
|---|
| 57 | * @param cSegs The number of segments.
|
|---|
| 58 | * @param paSegs The segments.
|
|---|
| 59 | */
|
|---|
| 60 | static void vboxnetIntIfCopySG(void *pvFrame, size_t cSegs, PCINTNETSEG paSegs)
|
|---|
| 61 | {
|
|---|
| 62 | uint8_t *pbDst = (uint8_t *)pvFrame;
|
|---|
| 63 | for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
|
|---|
| 64 | {
|
|---|
| 65 | memcpy(pbDst, paSegs[iSeg].pv, paSegs[iSeg].cb);
|
|---|
| 66 | pbDst += paSegs[iSeg].cb;
|
|---|
| 67 | }
|
|---|
| 68 | }
|
|---|
| 69 |
|
|---|
| 70 |
|
|---|
| 71 | /**
|
|---|
| 72 | * Writes a frame packet to the buffer.
|
|---|
| 73 | *
|
|---|
| 74 | * @returns VBox status code.
|
|---|
| 75 | * @param pBuf The buffer.
|
|---|
| 76 | * @param pRingBuf The ring buffer to read from.
|
|---|
| 77 | * @param cSegs The number of segments.
|
|---|
| 78 | * @param paSegs The segments.
|
|---|
| 79 | */
|
|---|
| 80 | int VBoxNetIntIfRingWriteFrame(PINTNETBUF pBuf, PINTNETRINGBUF pRingBuf, size_t cSegs, PCINTNETSEG paSegs)
|
|---|
| 81 | {
|
|---|
| 82 | RT_NOREF(pBuf);
|
|---|
| 83 |
|
|---|
| 84 | /*
|
|---|
| 85 | * Validate input.
|
|---|
| 86 | */
|
|---|
| 87 | AssertPtr(pBuf);
|
|---|
| 88 | AssertPtr(pRingBuf);
|
|---|
| 89 | AssertPtr(paSegs);
|
|---|
| 90 | Assert(cSegs > 0);
|
|---|
| 91 |
|
|---|
| 92 | /*
|
|---|
| 93 | * Calc frame size.
|
|---|
| 94 | */
|
|---|
| 95 | uint32_t cbFrame = 0;
|
|---|
| 96 | for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
|
|---|
| 97 | cbFrame += paSegs[iSeg].cb;
|
|---|
| 98 | Assert(cbFrame >= sizeof(RTMAC) * 2);
|
|---|
| 99 |
|
|---|
| 100 | /*
|
|---|
| 101 | * Allocate a frame, copy the data and commit it.
|
|---|
| 102 | */
|
|---|
| 103 | PINTNETHDR pHdr = NULL;
|
|---|
| 104 | void *pvFrame = NULL;
|
|---|
| 105 | int rc = IntNetRingAllocateFrame(pRingBuf, cbFrame, &pHdr, &pvFrame);
|
|---|
| 106 | if (RT_SUCCESS(rc))
|
|---|
| 107 | {
|
|---|
| 108 | vboxnetIntIfCopySG(pvFrame, cSegs, paSegs);
|
|---|
| 109 | IntNetRingCommitFrame(pRingBuf, pHdr);
|
|---|
| 110 | return VINF_SUCCESS;
|
|---|
| 111 | }
|
|---|
| 112 |
|
|---|
| 113 | return rc;
|
|---|
| 114 | }
|
|---|
| 115 |
|
|---|
| 116 |
|
|---|
| 117 | /**
|
|---|
| 118 | * Sends a frame
|
|---|
| 119 | *
|
|---|
| 120 | * @returns VBox status code.
|
|---|
| 121 | * @param pSession The support driver session.
|
|---|
| 122 | * @param hIf The interface handle.
|
|---|
| 123 | * @param pBuf The interface buffer.
|
|---|
| 124 | * @param cSegs The number of segments.
|
|---|
| 125 | * @param paSegs The segments.
|
|---|
| 126 | * @param fFlush Whether to flush the write.
|
|---|
| 127 | */
|
|---|
| 128 | int VBoxNetIntIfSend(PSUPDRVSESSION pSession, INTNETIFHANDLE hIf, PINTNETBUF pBuf,
|
|---|
| 129 | size_t cSegs, PCINTNETSEG paSegs, bool fFlush)
|
|---|
| 130 | {
|
|---|
| 131 | int rc = VBoxNetIntIfRingWriteFrame(pBuf, &pBuf->Send, cSegs, paSegs);
|
|---|
| 132 | if (rc == VERR_BUFFER_OVERFLOW)
|
|---|
| 133 | {
|
|---|
| 134 | VBoxNetIntIfFlush(pSession, hIf);
|
|---|
| 135 | rc = VBoxNetIntIfRingWriteFrame(pBuf, &pBuf->Send, cSegs, paSegs);
|
|---|
| 136 | }
|
|---|
| 137 | if (RT_SUCCESS(rc) && fFlush)
|
|---|
| 138 | rc = VBoxNetIntIfFlush(pSession, hIf);
|
|---|
| 139 | return rc;
|
|---|
| 140 | }
|
|---|
