prism2sta.c

uClinux2.6上兼容PRISM2.0芯片组的USB设备驱动程序.

			** updated.  Choose the list which is currently okay.
			** See "prism2mib_priv_accessallow()" for details.
			*/

			if (hw->allow.modify == 0) {
				cnt  = hw->allow.cnt;
				addr = hw->allow.addr[0];
			} else {
				cnt  = hw->allow.cnt1;
				addr = hw->allow.addr1[0];
			}

			for (i = 0; i < cnt; i++, addr += WLAN_ADDR_LEN)
				if (memcmp(rec.address, addr, WLAN_ADDR_LEN) == 0) {
					rec.status = P80211ENUM_status_successful;
					break;
				}

			break;

		case WLAN_ACCESS_DENY:

			/*
			** Allow the authentication UNLESS the MAC address is
			** in the list of denied addresses.
			**
			** Since this is the interrupt handler, we may be here
			** while the access list is in the middle of being
			** updated.  Choose the list which is currently okay.
			** See "prism2mib_priv_accessdeny()" for details.
			*/

			if (hw->deny.modify == 0) {
				cnt  = hw->deny.cnt;
				addr = hw->deny.addr[0];
			} else {
				cnt  = hw->deny.cnt1;
				addr = hw->deny.addr1[0];
			}

			rec.status = P80211ENUM_status_successful;

			for (i = 0; i < cnt; i++, addr += WLAN_ADDR_LEN)
				if (memcmp(rec.address, addr, WLAN_ADDR_LEN) == 0) {
					rec.status = P80211ENUM_status_unspec_failure;
					break;
				}

			break;
	}

	/*
	** If the authentication is okay, then add the MAC address to the list
	** of authenticated stations.  Don't add the address if it is already in
	** the list.  (802.11b does not seem to disallow a station from issuing
	** an authentication request when the station is already authenticated.
	** Does this sort of thing ever happen?  We might as well do the check
	** just in case.)
	*/

	added = 0;

	if (rec.status == P80211ENUM_status_successful) {
		for (i = 0; i < hw->authlist.cnt; i++)
			if (memcmp(rec.address, hw->authlist.addr[i], WLAN_ADDR_LEN) == 0)
				break;

		if (i >= hw->authlist.cnt) {
			if (hw->authlist.cnt >= WLAN_AUTH_MAX) {
				rec.status = P80211ENUM_status_ap_full;
			} else {
				memcpy(hw->authlist.addr[hw->authlist.cnt],
					rec.address, WLAN_ADDR_LEN);
				hw->authlist.cnt++;
				added = 1;
			}
		}
	}

	/*
	** Send back the results of the authentication.  If this doesn't work,
	** then make sure to remove the address from the authenticated list if
	** it was added.
	*/

	rec.status = host2hfa384x_16(rec.status);
	rec.algorithm = inf->info.authreq.algorithm;

	result = hfa384x_drvr_setconfig(hw, HFA384x_RID_AUTHENTICATESTA,
							&rec, sizeof(rec));
	if (result) {
		if (added) hw->authlist.cnt--;
		WLAN_LOG_ERROR("setconfig(authenticatestation) failed, result=%d\n", result);
	}

	DBFEXIT;

	return;
}


/*----------------------------------------------------------------
* prism2sta_inf_psusercnt
*
* Handles the receipt of a PowerSaveUserCount info frame. Should 
* be present in APs only.
*
* Arguments:
*	wlandev		wlan device structure
*	inf		ptr to info frame (contents in hfa384x order)
*
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_inf_psusercnt( wlandevice_t *wlandev, hfa384x_InfFrame_t *inf)
{
        hfa384x_t               *hw = (hfa384x_t *)wlandev->priv;

	DBFENTER;

	hw->psusercount = hfa384x2host_16(inf->info.psusercnt.usercnt);

	DBFEXIT;

	return;
}

/*----------------------------------------------------------------
* prism2sta_ev_dtim
*
* Handles the DTIM early warning event.
*
* Arguments:
*	wlandev		wlan device structure
*
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_ev_dtim(wlandevice_t *wlandev)
{
#if 0
        hfa384x_t               *hw = (hfa384x_t *)wlandev->priv;
#endif
	DBFENTER;
	WLAN_LOG_DEBUG(3, "DTIM event, currently unhandled.\n");
	DBFEXIT;
	return;
}


/*----------------------------------------------------------------
* prism2sta_ev_infdrop
*
* Handles the InfDrop event.
*
* Arguments:
*	wlandev		wlan device structure
*
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_ev_infdrop(wlandevice_t *wlandev)
{
#if 0
        hfa384x_t               *hw = (hfa384x_t *)wlandev->priv;
#endif
	DBFENTER;
	WLAN_LOG_DEBUG(3, "Info frame dropped due to card mem low.\n");
	DBFEXIT;
	return;
}


/*----------------------------------------------------------------
* prism2sta_ev_info
*
* Handles the Info event.
*
* Arguments:
*	wlandev		wlan device structure
*	inf		ptr to a generic info frame
*
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_ev_info(wlandevice_t *wlandev, hfa384x_InfFrame_t *inf)
{
	DBFENTER;
	inf->infotype = hfa384x2host_16(inf->infotype);
	/* Dispatch */
	switch ( inf->infotype ) {
		case HFA384x_IT_HANDOVERADDR:
			prism2sta_inf_handover(wlandev, inf);
			break;
		case HFA384x_IT_COMMTALLIES:
			prism2sta_inf_tallies(wlandev, inf);
			break;
               case HFA384x_IT_HOSTSCANRESULTS:
                        prism2sta_inf_hostscanresults(wlandev, inf);
                        break;
		case HFA384x_IT_SCANRESULTS:
			prism2sta_inf_scanresults(wlandev, inf);
			break;
		case HFA384x_IT_CHINFORESULTS:
			prism2sta_inf_chinforesults(wlandev, inf);
			break;
		case HFA384x_IT_LINKSTATUS:
			prism2sta_inf_linkstatus(wlandev, inf);
			break;
		case HFA384x_IT_ASSOCSTATUS:
			prism2sta_inf_assocstatus(wlandev, inf);
			break;
		case HFA384x_IT_AUTHREQ:
			prism2sta_inf_authreq(wlandev, inf);
			break;
		case HFA384x_IT_PSUSERCNT:
			prism2sta_inf_psusercnt(wlandev, inf);
			break;
	        case HFA384x_IT_KEYIDCHANGED:
			WLAN_LOG_WARNING("Unhandled IT_KEYIDCHANGED\n");
			break;
	        case HFA384x_IT_ASSOCREQ:
			WLAN_LOG_WARNING("Unhandled IT_ASSOCREQ\n");
			break;
	        case HFA384x_IT_MICFAILURE:
			WLAN_LOG_WARNING("Unhandled IT_MICFAILURE\n");
			break;
		default:
			WLAN_LOG_WARNING(
				"Unknown info type=0x%02x\n", inf->infotype);
			break;
	}
	DBFEXIT;
	return;
}


/*----------------------------------------------------------------
* prism2sta_ev_txexc
*
* Handles the TxExc event.  A Transmit Exception event indicates
* that the MAC's TX process was unsuccessful - so the packet did
* not get transmitted.
*
* Arguments:
*	wlandev		wlan device structure
*	status		tx frame status word
*
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_ev_txexc(wlandevice_t *wlandev, UINT16 status)
{
	DBFENTER;

	WLAN_LOG_DEBUG(3, "TxExc status=0x%x.\n", status);

	DBFEXIT;
	return;
}


/*----------------------------------------------------------------
* prism2sta_ev_tx
*
* Handles the Tx event.
*
* Arguments:
*	wlandev		wlan device structure
*	status		tx frame status word
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_ev_tx(wlandevice_t *wlandev, UINT16 status)
{
	DBFENTER;
	WLAN_LOG_DEBUG(4, "Tx Complete, status=0x%04x\n", status);
	/* update linux network stats */
	wlandev->linux_stats.tx_packets++;
	DBFEXIT;
	return;
}


/*----------------------------------------------------------------
* prism2sta_ev_rx
*
* Handles the Rx event.
*
* Arguments:
*	wlandev		wlan device structure
*
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_ev_rx(wlandevice_t *wlandev, struct sk_buff *skb)
{
	DBFENTER;

	p80211netdev_rx(wlandev, skb);

	DBFEXIT;
	return;
}

/*----------------------------------------------------------------
* prism2sta_ev_alloc
*
* Handles the Alloc event.
*
* Arguments:
*	wlandev		wlan device structure
*
* Returns: 
*	nothing
*
* Side effects:
*
* Call context:
*	interrupt
----------------------------------------------------------------*/
void prism2sta_ev_alloc(wlandevice_t *wlandev)
{
	DBFENTER;

	p80211netdev_wake_queue(wlandev);

	DBFEXIT;
	return;
}

#if (WLAN_HOSTIF == WLAN_PLX || WLAN_HOSTIF == WLAN_PCI)
#ifdef CONFIG_PM
static int prism2sta_suspend_pci(struct pci_dev *pdev, pm_message_t state)
{
       	wlandevice_t		*wlandev;

	wlandev = (wlandevice_t *) pci_get_drvdata(pdev);

	/* reset hardware */
	if (wlandev) {
		prism2sta_ifstate(wlandev, P80211ENUM_ifstate_disable);
		p80211_suspend(wlandev);
	}

	// call a netif_device_detach(wlandev->netdev) ?

	return 0;
}

static int prism2sta_resume_pci (struct pci_dev *pdev)
{
       	wlandevice_t		*wlandev;

	wlandev = (wlandevice_t *) pci_get_drvdata(pdev);

	if (wlandev) {
		prism2sta_ifstate(wlandev, P80211ENUM_ifstate_disable);
		p80211_resume(wlandev);
	}
		
        return 0;
}
#endif
#endif

/*----------------------------------------------------------------
* create_wlan
*
* Called at module init time.  This creates the wlandevice_t structure
* and initializes it with relevant bits.
*
* Arguments:
*	none
*
* Returns: 
*	the created wlandevice_t structure.
*
* Side effects:
* 	also allocates the priv/hw structures.
*
* Call context:
*	process thread
*
----------------------------------------------------------------*/
static wlandevice_t *create_wlan(void)
{
        wlandevice_t    *wlandev = NULL;
	hfa384x_t	*hw = NULL;

      	/* Alloc our structures */
	wlandev =	kmalloc(sizeof(wlandevice_t), GFP_KERNEL);
	hw =		kmalloc(sizeof(hfa384x_t), GFP_KERNEL);

	if (!wlandev || !hw) {
		WLAN_LOG_ERROR("%s: Memory allocation failure.\n", dev_info);
		if (wlandev)	kfree(wlandev);
		if (hw)		kfree(hw);
		return NULL;
	}

	/* Clear all the structs */
	memset(wlandev, 0, sizeof(wlandevice_t));
	memset(hw, 0, sizeof(hfa384x_t));

	/* Initialize the network device object. */
	wlandev->nsdname = dev_info;
	wlandev->msdstate = WLAN_MSD_HWPRESENT_PENDING;
	wlandev->priv = hw;
	wlandev->open = prism2sta_open;
	wlandev->close = prism2sta_close;
	wlandev->reset = prism2sta_reset;
#ifdef CONFIG_PROC_FS
	wlandev->nsd_proc_read = prism2sta_proc_read;
#endif
	wlandev->txframe = prism2sta_txframe;
	wlandev->mlmerequest = prism2sta_mlmerequest;
	wlandev->set_multicast_list = prism2sta_setmulticast;
	wlandev->tx_timeout = hfa384x_tx_timeout;

	wlandev->nsdcaps = P80211_NSDCAP_HWFRAGMENT | 
	                   P80211_NSDCAP_AUTOJOIN;

	/* Initialize the device private data stucture. */
        hw->dot11_desired_bss_type = 1;

	return wlandev;
}

#ifdef CONFIG_PRO