int vboxNetFltOsInitInstance(PVBOXNETFLTINS pThis, void *pvContext)
{
char nam[NG_NODESIZ];
struct ifnet *ifp;
node_p node;
RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
VBOXCURVNET_SET_FROM_UCRED();
NOREF(pvContext);
ifp = ifunit(pThis->szName);
if (ifp == NULL)
return VERR_INTNET_FLT_IF_NOT_FOUND;
/* Create a new netgraph node for this instance */
if (ng_make_node_common(&ng_vboxnetflt_typestruct, &node) != 0)
return VERR_INTERNAL_ERROR;
RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
ASMAtomicUoWritePtr(&pThis->u.s.ifp, ifp);
pThis->u.s.node = node;
bcopy(IF_LLADDR(ifp), &pThis->u.s.MacAddr, ETHER_ADDR_LEN);
ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
/* Initialize deferred input queue */
bzero(&pThis->u.s.inq, sizeof(struct ifqueue));
mtx_init(&pThis->u.s.inq.ifq_mtx, "vboxnetflt inq", NULL, MTX_SPIN);
TASK_INIT(&pThis->u.s.tskin, 0, vboxNetFltFreeBSDinput, pThis);
/* Initialize deferred output queue */
bzero(&pThis->u.s.outq, sizeof(struct ifqueue));
mtx_init(&pThis->u.s.outq.ifq_mtx, "vboxnetflt outq", NULL, MTX_SPIN);
TASK_INIT(&pThis->u.s.tskout, 0, vboxNetFltFreeBSDoutput, pThis);
RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
NG_NODE_SET_PRIVATE(node, pThis);
/* Attempt to name it vboxnetflt_<ifname> */
snprintf(nam, NG_NODESIZ, "vboxnetflt_%s", pThis->szName);
ng_name_node(node, nam);
/* Report MAC address, promiscuous mode and GSO capabilities. */
/** @todo keep these reports up to date, either by polling for changes or
* intercept some control flow if possible. */
if (vboxNetFltTryRetainBusyNotDisconnected(pThis))
{
Assert(pThis->pSwitchPort);
pThis->pSwitchPort->pfnReportMacAddress(pThis->pSwitchPort, &pThis->u.s.MacAddr);
pThis->pSwitchPort->pfnReportPromiscuousMode(pThis->pSwitchPort, vboxNetFltFreeBsdIsPromiscuous(pThis));
pThis->pSwitchPort->pfnReportGsoCapabilities(pThis->pSwitchPort, 0, INTNETTRUNKDIR_WIRE | INTNETTRUNKDIR_HOST);
pThis->pSwitchPort->pfnReportNoPreemptDsts(pThis->pSwitchPort, 0 /* none */);
vboxNetFltRelease(pThis, true /*fBusy*/);
}
VBOXCURVNET_RESTORE();
return VINF_SUCCESS;
}
/**
* Internal worker for vboxNetFltOsInitInstance and vboxNetFltOsMaybeRediscovered.
*
* @returns VBox status code.
* @param pThis The instance.
* @param fRediscovery If set we're doing a rediscovery attempt, so, don't
* flood the release log.
*/
static int vboxNetFltDarwinAttachToInterface(PVBOXNETFLTINS pThis, bool fRediscovery)
{
LogFlow(("vboxNetFltDarwinAttachToInterface: pThis=%p (%s)\n", pThis, pThis->szName));
/*
* Locate the interface first.
*
* The pIfNet member is updated before iflt_attach is called and used
* to deal with the hypothetical case where someone rips out the
* interface immediately after our iflt_attach call.
*/
ifnet_t pIfNet = NULL;
errno_t err = ifnet_find_by_name(pThis->szName, &pIfNet);
if (err)
{
Assert(err == ENXIO);
if (!fRediscovery)
LogRel(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
else
Log(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
return VERR_INTNET_FLT_IF_NOT_FOUND;
}
RTSpinlockAcquire(pThis->hSpinlock);
ASMAtomicUoWritePtr(&pThis->u.s.pIfNet, pIfNet);
RTSpinlockReleaseNoInts(pThis->hSpinlock);
/*
* Get the mac address while we still have a valid ifnet reference.
*/
err = ifnet_lladdr_copy_bytes(pIfNet, &pThis->u.s.MacAddr, sizeof(pThis->u.s.MacAddr));
if (!err)
{
/*
* Try attach the filter.
*/
struct iff_filter RegRec;
RegRec.iff_cookie = pThis;
RegRec.iff_name = "VBoxNetFlt";
RegRec.iff_protocol = 0;
RegRec.iff_input = vboxNetFltDarwinIffInput;
RegRec.iff_output = vboxNetFltDarwinIffOutput;
RegRec.iff_event = vboxNetFltDarwinIffEvent;
RegRec.iff_ioctl = vboxNetFltDarwinIffIoCtl;
RegRec.iff_detached = vboxNetFltDarwinIffDetached;
interface_filter_t pIfFilter = NULL;
err = iflt_attach(pIfNet, &RegRec, &pIfFilter);
Assert(err || pIfFilter);
RTSpinlockAcquire(pThis->hSpinlock);
pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
if (pIfNet && !err)
{
ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
ASMAtomicUoWritePtr(&pThis->u.s.pIfFilter, pIfFilter);
pIfNet = NULL; /* don't dereference it */
}
RTSpinlockReleaseNoInts(pThis->hSpinlock);
/* Report capabilities. */
if ( !pIfNet
&& vboxNetFltTryRetainBusyNotDisconnected(pThis))
{
Assert(pThis->pSwitchPort);
pThis->pSwitchPort->pfnReportMacAddress(pThis->pSwitchPort, &pThis->u.s.MacAddr);
pThis->pSwitchPort->pfnReportPromiscuousMode(pThis->pSwitchPort, vboxNetFltDarwinIsPromiscuous(pThis));
pThis->pSwitchPort->pfnReportGsoCapabilities(pThis->pSwitchPort, 0, INTNETTRUNKDIR_WIRE | INTNETTRUNKDIR_HOST);
pThis->pSwitchPort->pfnReportNoPreemptDsts(pThis->pSwitchPort, 0 /* none */);
vboxNetFltRelease(pThis, true /*fBusy*/);
}
}
/* Release the interface on failure. */
if (pIfNet)
ifnet_release(pIfNet);
int rc = RTErrConvertFromErrno(err);
if (RT_SUCCESS(rc))
LogRel(("VBoxFltDrv: attached to '%s' / %.*Rhxs\n", pThis->szName, sizeof(pThis->u.s.MacAddr), &pThis->u.s.MacAddr));
else
LogRel(("VBoxFltDrv: failed to attach to ifnet '%s' (err=%d)\n", pThis->szName, err));
return rc;
}