/**
* 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;
}
/* S/G API */
int VBoxNetBaseService::sendBufferOnWire(PCINTNETSEG pcSg, int cSg, size_t cbFrame)
{
int rc = VINF_SUCCESS;
PINTNETHDR pHdr = NULL;
uint8_t *pu8Frame = NULL;
int offFrame = 0;
int idxSg = 0;
/* Allocate frame */
rc = IntNetRingAllocateFrame(&m_pIfBuf->Send, cbFrame, &pHdr, (void **)&pu8Frame);
AssertRCReturn(rc, rc);
/* Now we fill pvFrame with S/G above */
for (idxSg = 0; idxSg < cSg; ++idxSg)
{
memcpy(&pu8Frame[offFrame], pcSg[idxSg].pv, pcSg[idxSg].cb);
offFrame+=pcSg[idxSg].cb;
}
/* Commit */
IntNetRingCommitFrame(&m_pIfBuf->Send, pHdr);
LogFlowFuncLeaveRC(rc);
return rc;
}
