/**
* Looks up a IDC handle by session.
*
* @returns The IDC handle on success, NULL on failure.
* @param pSession The session to lookup.
*
* @internal
*/
PSUPDRVIDCHANDLE supR0IdcGetHandleFromSession(PSUPDRVSESSION pSession)
{
PSUPDRVIDCHANDLE pHandle = ASMAtomicUoReadPtrT(&g_pMainHandle, PSUPDRVIDCHANDLE);
if ( VALID_PTR(pHandle)
&& pHandle->s.pSession == pSession)
return pHandle;
return NULL;
}
void vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis)
{
interface_filter_t pIfFilter;
/*
* Carefully obtain the interface filter reference and detach it.
*/
RTSpinlockAcquire(pThis->hSpinlock);
pIfFilter = ASMAtomicUoReadPtrT(&pThis->u.s.pIfFilter, interface_filter_t);
if (pIfFilter)
ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfFilter);
RTSpinlockReleaseNoInts(pThis->hSpinlock);
if (pIfFilter)
iflt_detach(pIfFilter);
}
/**
* Reads and retains the host interface handle.
*
* @returns The handle, NULL if detached.
* @param pThis
*/
DECLINLINE(ifnet_t) vboxNetFltDarwinRetainIfNet(PVBOXNETFLTINS pThis)
{
ifnet_t pIfNet = NULL;
/*
* Be careful here to avoid problems racing the detached callback.
*/
RTSpinlockAcquire(pThis->hSpinlock);
if (!ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost))
{
pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
if (pIfNet)
ifnet_reference(pIfNet);
}
RTSpinlockReleaseNoInts(pThis->hSpinlock);
return pIfNet;
}
/**
*
* @see iff_detached_func in the darwin kpi.
*/
static void vboxNetFltDarwinIffDetached(void *pvThis, ifnet_t pIfNet)
{
PVBOXNETFLTINS pThis = (PVBOXNETFLTINS)pvThis;
uint64_t NanoTS = RTTimeSystemNanoTS();
LogFlow(("vboxNetFltDarwinIffDetached: pThis=%p NanoTS=%RU64 (%d)\n",
pThis, NanoTS, VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : -1));
Assert(!pThis->fDisconnectedFromHost);
Assert(!pThis->fRediscoveryPending);
/*
* If we've put it into promiscuous mode, undo that now. If we don't
* the if_pcount will go all wrong when it's replugged.
*/
if (ASMAtomicXchgBool(&pThis->u.s.fSetPromiscuous, false))
ifnet_set_promiscuous(pIfNet, 0);
/*
* We carefully take the spinlock and increase the interface reference
* behind it in order to avoid problematic races with the detached callback.
*/
RTSpinlockAcquire(pThis->hSpinlock);
pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
int cPromisc = VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : - 1;
ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfNet);
ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfFilter);
ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
pThis->u.s.fSetPromiscuous = false;
ASMAtomicUoWriteU64(&pThis->NanoTSLastRediscovery, NanoTS);
ASMAtomicUoWriteBool(&pThis->fRediscoveryPending, false);
ASMAtomicWriteBool(&pThis->fDisconnectedFromHost, true);
RTSpinlockReleaseNoInts(pThis->hSpinlock);
if (pIfNet)
ifnet_release(pIfNet);
LogRel(("VBoxNetFlt: was detached from '%s' (%d)\n", pThis->szName, cPromisc));
}
void vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive)
{
struct ifnet *ifp;
struct ifreq ifreq;
int error;
node_p node;
struct ng_mesg *msg;
struct ngm_connect *con;
struct ngm_rmhook *rm;
char path[NG_PATHSIZ];
Log(("%s: fActive:%d\n", __func__, fActive));
ifp = ASMAtomicUoReadPtrT(&pThis->u.s.ifp, struct ifnet *);
VBOXCURVNET_SET(ifp->if_vnet);
node = ASMAtomicUoReadPtrT(&pThis->u.s.node, node_p);
memset(&ifreq, 0, sizeof(struct ifreq));
/* Activate interface */
if (fActive)
{
pThis->u.s.flags = ifp->if_flags;
ifpromisc(ifp, 1);
/* ng_ether nodes are named after the interface name */
snprintf(path, sizeof(path), "%s:", ifp->if_xname);
/*
* Send a netgraph connect message to the ng_ether node
* assigned to the bridged interface. Connecting
* the hooks 'lower' (ng_ether) to out 'input'.
*/
NG_MKMESSAGE(msg, NGM_GENERIC_COOKIE, NGM_CONNECT,
sizeof(struct ngm_connect), M_NOWAIT);
if (msg == NULL)
return;
con = (struct ngm_connect *)msg->data;
snprintf(con->path, NG_PATHSIZ, "vboxnetflt_%s:", ifp->if_xname);
strlcpy(con->ourhook, "lower", NG_HOOKSIZ);
strlcpy(con->peerhook, "input", NG_HOOKSIZ);
NG_SEND_MSG_PATH(error, node, msg, path, 0);
/*
* Do the same for the hooks 'upper' (ng_ether) and our
* 'output' hook.
*/
NG_MKMESSAGE(msg, NGM_GENERIC_COOKIE, NGM_CONNECT,
sizeof(struct ngm_connect), M_NOWAIT);
if (msg == NULL)
return;
con = (struct ngm_connect *)msg->data;
snprintf(con->path, NG_PATHSIZ, "vboxnetflt_%s:",
ifp->if_xname);
strlcpy(con->ourhook, "upper", sizeof(con->ourhook));
strlcpy(con->peerhook, "output", sizeof(con->peerhook));
NG_SEND_MSG_PATH(error, node, msg, path, 0);
}
else
{
/* De-activate interface */
pThis->u.s.flags = 0;
ifpromisc(ifp, 0);
/* Disconnect msgs are addressed to ourself */
snprintf(path, sizeof(path), "vboxnetflt_%s:", ifp->if_xname);
/*
* Send a netgraph message to disconnect our 'input' hook
*/
NG_MKMESSAGE(msg, NGM_GENERIC_COOKIE, NGM_RMHOOK,
sizeof(struct ngm_rmhook), M_NOWAIT);
if (msg == NULL)
return;
rm = (struct ngm_rmhook *)msg->data;
strlcpy(rm->ourhook, "input", NG_HOOKSIZ);
NG_SEND_MSG_PATH(error, node, msg, path, 0);
/*
* Send a netgraph message to disconnect our 'output' hook
*/
NG_MKMESSAGE(msg, NGM_GENERIC_COOKIE, NGM_RMHOOK,
sizeof(struct ngm_rmhook), M_NOWAIT);
if (msg == NULL)
return;
rm = (struct ngm_rmhook *)msg->data;
strlcpy(rm->ourhook, "output", NG_HOOKSIZ);
NG_SEND_MSG_PATH(error, node, msg, path, 0);
}
VBOXCURVNET_RESTORE();
}
/**
* 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;
}