drivers/staging/usbip/userspace/libsrc/vhci_driver.c: test the just-initialized value

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / wlan-ng / prism2mgmt.c

/* src/prism2/driver/prism2mgmt.c
*
* Management request handler functions.
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
*   The contents of this file are subject to the Mozilla Public
*   License Version 1.1 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.mozilla.org/MPL/
*
*   Software distributed under the License is distributed on an "AS
*   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
*   implied. See the License for the specific language governing
*   rights and limitations under the License.
*
*   Alternatively, the contents of this file may be used under the
*   terms of the GNU Public License version 2 (the "GPL"), in which
*   case the provisions of the GPL are applicable instead of the
*   above.  If you wish to allow the use of your version of this file
*   only under the terms of the GPL and not to allow others to use
*   your version of this file under the MPL, indicate your decision
*   by deleting the provisions above and replace them with the notice
*   and other provisions required by the GPL.  If you do not delete
*   the provisions above, a recipient may use your version of this
*   file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the linux-wlan Open Source project can be
* made directly to:
*
* AbsoluteValue Systems Inc.
* info@linux-wlan.com
* http://www.linux-wlan.com
*
* --------------------------------------------------------------------
*
* Portions of the development of this software were funded by
* Intersil Corporation as part of PRISM(R) chipset product development.
*
* --------------------------------------------------------------------
*
* The functions in this file handle management requests sent from
* user mode.
*
* Most of these functions have two separate blocks of code that are
* conditional on whether this is a station or an AP.  This is used
* to separate out the STA and AP responses to these management primitives.
* It's a choice (good, bad, indifferent?) to have the code in the same
* place so it's clear that the same primitive is implemented in both
* cases but has different behavior.
*
* --------------------------------------------------------------------
*/

#include <linux/if_arp.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/byteorder.h>
#include <linux/random.h>
#include <linux/usb.h>
#include <linux/bitops.h>

#include "p80211types.h"
#include "p80211hdr.h"
#include "p80211mgmt.h"
#include "p80211conv.h"
#include "p80211msg.h"
#include "p80211netdev.h"
#include "p80211metadef.h"
#include "p80211metastruct.h"
#include "hfa384x.h"
#include "prism2mgmt.h"

/* Converts 802.11 format rate specifications to prism2 */
#define p80211rate_to_p2bit(n)  ((((n)&~BIT(7)) == 2) ? BIT(0) :  \
                                 (((n)&~BIT(7)) == 4) ? BIT(1) : \
                                 (((n)&~BIT(7)) == 11) ? BIT(2) : \
                                 (((n)&~BIT(7)) == 22) ? BIT(3) : 0)

/*----------------------------------------------------------------
* prism2mgmt_scan
*
* Initiate a scan for BSSs.
*
* This function corresponds to MLME-scan.request and part of
* MLME-scan.confirm.  As far as I can tell in the standard, there
* are no restrictions on when a scan.request may be issued.  We have
* to handle in whatever state the driver/MAC happen to be.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
*       interrupt
----------------------------------------------------------------*/
int prism2mgmt_scan(wlandevice_t *wlandev, void *msgp)
{
        int result = 0;
        hfa384x_t *hw = wlandev->priv;
        struct p80211msg_dot11req_scan *msg = msgp;
        u16 roamingmode, word;
        int i, timeout;
        int istmpenable = 0;

        hfa384x_HostScanRequest_data_t scanreq;

        /* gatekeeper check */
        if (HFA384x_FIRMWARE_VERSION(hw->ident_sta_fw.major,
                                     hw->ident_sta_fw.minor,
                                     hw->ident_sta_fw.variant) <
            HFA384x_FIRMWARE_VERSION(1, 3, 2)) {
                printk(KERN_ERR
                       "HostScan not supported with current firmware (<1.3.2).\n");
                result = 1;
                msg->resultcode.data = P80211ENUM_resultcode_not_supported;
                goto exit;
        }

        memset(&scanreq, 0, sizeof(scanreq));

        /* save current roaming mode */
        result = hfa384x_drvr_getconfig16(hw,
                                          HFA384x_RID_CNFROAMINGMODE,
                                          &roamingmode);
        if (result) {
                printk(KERN_ERR "getconfig(ROAMMODE) failed. result=%d\n",
                       result);
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        /* drop into mode 3 for the scan */
        result = hfa384x_drvr_setconfig16(hw,
                                          HFA384x_RID_CNFROAMINGMODE,
                                          HFA384x_ROAMMODE_HOSTSCAN_HOSTROAM);
        if (result) {
                printk(KERN_ERR "setconfig(ROAMINGMODE) failed. result=%d\n",
                       result);
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        /* active or passive? */
        if (HFA384x_FIRMWARE_VERSION(hw->ident_sta_fw.major,
                                     hw->ident_sta_fw.minor,
                                     hw->ident_sta_fw.variant) >
            HFA384x_FIRMWARE_VERSION(1, 5, 0)) {
                if (msg->scantype.data != P80211ENUM_scantype_active)
                        word = cpu_to_le16(msg->maxchanneltime.data);
                else
                        word = 0;

                result =
                    hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFPASSIVESCANCTRL,
                                             word);
                if (result) {
                        printk(KERN_WARNING "Passive scan not supported with "
                               "current firmware.  (<1.5.1)\n");
                }
        }

        /* set up the txrate to be 2MBPS. Should be fastest basicrate... */
        word = HFA384x_RATEBIT_2;
        scanreq.txRate = cpu_to_le16(word);

        /* set up the channel list */
        word = 0;
        for (i = 0; i < msg->channellist.data.len; i++) {
                u8 channel = msg->channellist.data.data[i];
                if (channel > 14)
                        continue;
                /* channel 1 is BIT 0 ... channel 14 is BIT 13 */
                word |= (1 << (channel - 1));
        }
        scanreq.channelList = cpu_to_le16(word);

        /* set up the ssid, if present. */
        scanreq.ssid.len = cpu_to_le16(msg->ssid.data.len);
        memcpy(scanreq.ssid.data, msg->ssid.data.data, msg->ssid.data.len);

        /* Enable the MAC port if it's not already enabled  */
        result = hfa384x_drvr_getconfig16(hw, HFA384x_RID_PORTSTATUS, &word);
        if (result) {
                printk(KERN_ERR "getconfig(PORTSTATUS) failed. "
                       "result=%d\n", result);
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }
        if (word == HFA384x_PORTSTATUS_DISABLED) {
                u16 wordbuf[17];

                result = hfa384x_drvr_setconfig16(hw,
                                        HFA384x_RID_CNFROAMINGMODE,
                                        HFA384x_ROAMMODE_HOSTSCAN_HOSTROAM);
                if (result) {
                        printk(KERN_ERR
                               "setconfig(ROAMINGMODE) failed. result=%d\n",
                               result);
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        goto exit;
                }
                /* Construct a bogus SSID and assign it to OwnSSID and
                 * DesiredSSID
                 */
                wordbuf[0] = cpu_to_le16(WLAN_SSID_MAXLEN);
                get_random_bytes(&wordbuf[1], WLAN_SSID_MAXLEN);
                result = hfa384x_drvr_setconfig(hw, HFA384x_RID_CNFOWNSSID,
                                                wordbuf,
                                                HFA384x_RID_CNFOWNSSID_LEN);
                if (result) {
                        printk(KERN_ERR "Failed to set OwnSSID.\n");
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        goto exit;
                }
                result = hfa384x_drvr_setconfig(hw, HFA384x_RID_CNFDESIREDSSID,
                                                wordbuf,
                                                HFA384x_RID_CNFDESIREDSSID_LEN);
                if (result) {
                        printk(KERN_ERR "Failed to set DesiredSSID.\n");
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        goto exit;
                }
                /* bsstype */
                result = hfa384x_drvr_setconfig16(hw,
                                                  HFA384x_RID_CNFPORTTYPE,
                                                  HFA384x_PORTTYPE_IBSS);
                if (result) {
                        printk(KERN_ERR "Failed to set CNFPORTTYPE.\n");
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        goto exit;
                }
                /* ibss options */
                result = hfa384x_drvr_setconfig16(hw,
                                        HFA384x_RID_CREATEIBSS,
                                        HFA384x_CREATEIBSS_JOINCREATEIBSS);
                if (result) {
                        printk(KERN_ERR "Failed to set CREATEIBSS.\n");
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        goto exit;
                }
                result = hfa384x_drvr_enable(hw, 0);
                if (result) {
                        printk(KERN_ERR "drvr_enable(0) failed. "
                               "result=%d\n", result);
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        goto exit;
                }
                istmpenable = 1;
        }

        /* Figure out our timeout first Kus, then HZ */
        timeout = msg->channellist.data.len * msg->maxchanneltime.data;
        timeout = (timeout * HZ) / 1000;

        /* Issue the scan request */
        hw->scanflag = 0;

        result = hfa384x_drvr_setconfig(hw,
                                        HFA384x_RID_HOSTSCAN, &scanreq,
                                        sizeof(hfa384x_HostScanRequest_data_t));
        if (result) {
                printk(KERN_ERR "setconfig(SCANREQUEST) failed. result=%d\n",
                       result);
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        /* sleep until info frame arrives */
        wait_event_interruptible_timeout(hw->cmdq, hw->scanflag, timeout);

        msg->numbss.status = P80211ENUM_msgitem_status_data_ok;
        if (hw->scanflag == -1)
                hw->scanflag = 0;

        msg->numbss.data = hw->scanflag;

        hw->scanflag = 0;

        /* Disable port if we temporarily enabled it. */
        if (istmpenable) {
                result = hfa384x_drvr_disable(hw, 0);
                if (result) {
                        printk(KERN_ERR "drvr_disable(0) failed. "
                               "result=%d\n", result);
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        goto exit;
                }
        }

        /* restore original roaming mode */
        result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFROAMINGMODE,
                                          roamingmode);
        if (result) {
                printk(KERN_ERR "setconfig(ROAMMODE) failed. result=%d\n",
                       result);
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        result = 0;
        msg->resultcode.data = P80211ENUM_resultcode_success;

exit:
        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;

        return result;
}

/*----------------------------------------------------------------
* prism2mgmt_scan_results
*
* Retrieve the BSS description for one of the BSSs identified in
* a scan.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
*       interrupt
----------------------------------------------------------------*/
int prism2mgmt_scan_results(wlandevice_t *wlandev, void *msgp)
{
        int result = 0;
        struct p80211msg_dot11req_scan_results *req;
        hfa384x_t *hw = wlandev->priv;
        hfa384x_HScanResultSub_t *item = NULL;

        int count;

        req = (struct p80211msg_dot11req_scan_results *) msgp;

        req->resultcode.status = P80211ENUM_msgitem_status_data_ok;

        if (!hw->scanresults) {
                printk(KERN_ERR
                       "dot11req_scan_results can only be used after a successful dot11req_scan.\n");
                result = 2;
                req->resultcode.data = P80211ENUM_resultcode_invalid_parameters;
                goto exit;
        }

        count = (hw->scanresults->framelen - 3) / 32;
        if (count > 32)
                count = 32;

        if (req->bssindex.data >= count) {
                pr_debug("requested index (%d) out of range (%d)\n",
                         req->bssindex.data, count);
                result = 2;
                req->resultcode.data = P80211ENUM_resultcode_invalid_parameters;
                goto exit;
        }

        item = &(hw->scanresults->info.hscanresult.result[req->bssindex.data]);
        /* signal and noise */
        req->signal.status = P80211ENUM_msgitem_status_data_ok;
        req->noise.status = P80211ENUM_msgitem_status_data_ok;
        req->signal.data = le16_to_cpu(item->sl);
        req->noise.data = le16_to_cpu(item->anl);

        /* BSSID */
        req->bssid.status = P80211ENUM_msgitem_status_data_ok;
        req->bssid.data.len = WLAN_BSSID_LEN;
        memcpy(req->bssid.data.data, item->bssid, WLAN_BSSID_LEN);

        /* SSID */
        req->ssid.status = P80211ENUM_msgitem_status_data_ok;
        req->ssid.data.len = le16_to_cpu(item->ssid.len);
        memcpy(req->ssid.data.data, item->ssid.data, req->ssid.data.len);

        /* supported rates */
        for (count = 0; count < 10; count++)
                if (item->supprates[count] == 0)
                        break;

#define REQBASICRATE(N) \
        if ((count >= N) && DOT11_RATE5_ISBASIC_GET(item->supprates[(N)-1])) { \
                req->basicrate ## N .data = item->supprates[(N)-1]; \
                req->basicrate ## N .status = \
                        P80211ENUM_msgitem_status_data_ok; \
        }

        REQBASICRATE(1);
        REQBASICRATE(2);
        REQBASICRATE(3);
        REQBASICRATE(4);
        REQBASICRATE(5);
        REQBASICRATE(6);
        REQBASICRATE(7);
        REQBASICRATE(8);

#define REQSUPPRATE(N) \
        if (count >= N) { \
                req->supprate ## N .data = item->supprates[(N)-1]; \
                req->supprate ## N .status = \
                        P80211ENUM_msgitem_status_data_ok; \
        }

        REQSUPPRATE(1);
        REQSUPPRATE(2);
        REQSUPPRATE(3);
        REQSUPPRATE(4);
        REQSUPPRATE(5);
        REQSUPPRATE(6);
        REQSUPPRATE(7);
        REQSUPPRATE(8);

        /* beacon period */
        req->beaconperiod.status = P80211ENUM_msgitem_status_data_ok;
        req->beaconperiod.data = le16_to_cpu(item->bcnint);

        /* timestamps */
        req->timestamp.status = P80211ENUM_msgitem_status_data_ok;
        req->timestamp.data = jiffies;
        req->localtime.status = P80211ENUM_msgitem_status_data_ok;
        req->localtime.data = jiffies;

        /* atim window */
        req->ibssatimwindow.status = P80211ENUM_msgitem_status_data_ok;
        req->ibssatimwindow.data = le16_to_cpu(item->atim);

        /* Channel */
        req->dschannel.status = P80211ENUM_msgitem_status_data_ok;
        req->dschannel.data = le16_to_cpu(item->chid);

        /* capinfo bits */
        count = le16_to_cpu(item->capinfo);
        req->capinfo.status = P80211ENUM_msgitem_status_data_ok;
        req->capinfo.data = count;

        /* privacy flag */
        req->privacy.status = P80211ENUM_msgitem_status_data_ok;
        req->privacy.data = WLAN_GET_MGMT_CAP_INFO_PRIVACY(count);

        /* cfpollable */
        req->cfpollable.status = P80211ENUM_msgitem_status_data_ok;
        req->cfpollable.data = WLAN_GET_MGMT_CAP_INFO_CFPOLLABLE(count);

        /* cfpollreq */
        req->cfpollreq.status = P80211ENUM_msgitem_status_data_ok;
        req->cfpollreq.data = WLAN_GET_MGMT_CAP_INFO_CFPOLLREQ(count);

        /* bsstype */
        req->bsstype.status = P80211ENUM_msgitem_status_data_ok;
        req->bsstype.data = (WLAN_GET_MGMT_CAP_INFO_ESS(count)) ?
            P80211ENUM_bsstype_infrastructure : P80211ENUM_bsstype_independent;

        result = 0;
        req->resultcode.data = P80211ENUM_resultcode_success;

exit:
        return result;
}

/*----------------------------------------------------------------
* prism2mgmt_start
*
* Start a BSS.  Any station can do this for IBSS, only AP for ESS.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
*       interrupt
----------------------------------------------------------------*/
int prism2mgmt_start(wlandevice_t *wlandev, void *msgp)
{
        int result = 0;
        hfa384x_t *hw = wlandev->priv;
        struct p80211msg_dot11req_start *msg = msgp;

        p80211pstrd_t *pstr;
        u8 bytebuf[80];
        hfa384x_bytestr_t *p2bytestr = (hfa384x_bytestr_t *) bytebuf;
        u16 word;

        wlandev->macmode = WLAN_MACMODE_NONE;

        /* Set the SSID */
        memcpy(&wlandev->ssid, &msg->ssid.data, sizeof(msg->ssid.data));

        /*** ADHOC IBSS ***/
        /* see if current f/w is less than 8c3 */
        if (HFA384x_FIRMWARE_VERSION(hw->ident_sta_fw.major,
                                     hw->ident_sta_fw.minor,
                                     hw->ident_sta_fw.variant) <
            HFA384x_FIRMWARE_VERSION(0, 8, 3)) {
                /* Ad-Hoc not quite supported on Prism2 */
                msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
                msg->resultcode.data = P80211ENUM_resultcode_not_supported;
                goto done;
        }

        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;

        /*** STATION ***/
        /* Set the REQUIRED config items */
        /* SSID */
        pstr = (p80211pstrd_t *) &(msg->ssid.data);
        prism2mgmt_pstr2bytestr(p2bytestr, pstr);
        result = hfa384x_drvr_setconfig(hw, HFA384x_RID_CNFOWNSSID,
                                        bytebuf, HFA384x_RID_CNFOWNSSID_LEN);
        if (result) {
                printk(KERN_ERR "Failed to set CnfOwnSSID\n");
                goto failed;
        }
        result = hfa384x_drvr_setconfig(hw, HFA384x_RID_CNFDESIREDSSID,
                                        bytebuf,
                                        HFA384x_RID_CNFDESIREDSSID_LEN);
        if (result) {
                printk(KERN_ERR "Failed to set CnfDesiredSSID\n");
                goto failed;
        }

        /* bsstype - we use the default in the ap firmware */
        /* IBSS port */
        hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFPORTTYPE, 0);

        /* beacon period */
        word = msg->beaconperiod.data;
        result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFAPBCNint, word);
        if (result) {
                printk(KERN_ERR "Failed to set beacon period=%d.\n", word);
                goto failed;
        }

        /* dschannel */
        word = msg->dschannel.data;
        result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFOWNCHANNEL, word);
        if (result) {
                printk(KERN_ERR "Failed to set channel=%d.\n", word);
                goto failed;
        }
        /* Basic rates */
        word = p80211rate_to_p2bit(msg->basicrate1.data);
        if (msg->basicrate2.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->basicrate2.data);

        if (msg->basicrate3.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->basicrate3.data);

        if (msg->basicrate4.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->basicrate4.data);

        if (msg->basicrate5.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->basicrate5.data);

        if (msg->basicrate6.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->basicrate6.data);

        if (msg->basicrate7.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->basicrate7.data);

        if (msg->basicrate8.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->basicrate8.data);

        result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFBASICRATES, word);
        if (result) {
                printk(KERN_ERR "Failed to set basicrates=%d.\n", word);
                goto failed;
        }

        /* Operational rates (supprates and txratecontrol) */
        word = p80211rate_to_p2bit(msg->operationalrate1.data);
        if (msg->operationalrate2.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->operationalrate2.data);

        if (msg->operationalrate3.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->operationalrate3.data);

        if (msg->operationalrate4.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->operationalrate4.data);

        if (msg->operationalrate5.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->operationalrate5.data);

        if (msg->operationalrate6.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->operationalrate6.data);

        if (msg->operationalrate7.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->operationalrate7.data);

        if (msg->operationalrate8.status == P80211ENUM_msgitem_status_data_ok)
                word |= p80211rate_to_p2bit(msg->operationalrate8.data);

        result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFSUPPRATES, word);
        if (result) {
                printk(KERN_ERR "Failed to set supprates=%d.\n", word);
                goto failed;
        }

        result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_TXRATECNTL, word);
        if (result) {
                printk(KERN_ERR "Failed to set txrates=%d.\n", word);
                goto failed;
        }

        /* Set the macmode so the frame setup code knows what to do */
        if (msg->bsstype.data == P80211ENUM_bsstype_independent) {
                wlandev->macmode = WLAN_MACMODE_IBSS_STA;
                /* lets extend the data length a bit */
                hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFMAXDATALEN, 2304);
        }

        /* Enable the Port */
        result = hfa384x_drvr_enable(hw, 0);
        if (result) {
                printk(KERN_ERR "Enable macport failed, result=%d.\n", result);
                goto failed;
        }

        msg->resultcode.data = P80211ENUM_resultcode_success;

        goto done;
failed:
        pr_debug("Failed to set a config option, result=%d\n", result);
        msg->resultcode.data = P80211ENUM_resultcode_invalid_parameters;

done:
        result = 0;

        return result;
}

/*----------------------------------------------------------------
* prism2mgmt_readpda
*
* Collect the PDA data and put it in the message.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
----------------------------------------------------------------*/
int prism2mgmt_readpda(wlandevice_t *wlandev, void *msgp)
{
        hfa384x_t *hw = wlandev->priv;
        struct p80211msg_p2req_readpda *msg = msgp;
        int result;

        /* We only support collecting the PDA when in the FWLOAD
         * state.
         */
        if (wlandev->msdstate != WLAN_MSD_FWLOAD) {
                printk(KERN_ERR
                       "PDA may only be read " "in the fwload state.\n");
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        } else {
                /*  Call drvr_readpda(), it handles the auxport enable
                 *  and validating the returned PDA.
                 */
                result = hfa384x_drvr_readpda(hw,
                                              msg->pda.data,
                                              HFA384x_PDA_LEN_MAX);
                if (result) {
                        printk(KERN_ERR
                               "hfa384x_drvr_readpda() failed, "
                               "result=%d\n", result);

                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        msg->resultcode.status =
                            P80211ENUM_msgitem_status_data_ok;
                        return 0;
                }
                msg->pda.status = P80211ENUM_msgitem_status_data_ok;
                msg->resultcode.data = P80211ENUM_resultcode_success;
                msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        }

        return 0;
}

/*----------------------------------------------------------------
* prism2mgmt_ramdl_state
*
* Establishes the beginning/end of a card RAM download session.
*
* It is expected that the ramdl_write() function will be called
* one or more times between the 'enable' and 'disable' calls to
* this function.
*
* Note: This function should not be called when a mac comm port
*       is active.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
----------------------------------------------------------------*/
int prism2mgmt_ramdl_state(wlandevice_t *wlandev, void *msgp)
{
        hfa384x_t *hw = wlandev->priv;
        struct p80211msg_p2req_ramdl_state *msg = msgp;

        if (wlandev->msdstate != WLAN_MSD_FWLOAD) {
                printk(KERN_ERR
                       "ramdl_state(): may only be called "
                       "in the fwload state.\n");
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
                return 0;
        }

        /*
         ** Note: Interrupts are locked out if this is an AP and are NOT
         ** locked out if this is a station.
         */

        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        if (msg->enable.data == P80211ENUM_truth_true) {
                if (hfa384x_drvr_ramdl_enable(hw, msg->exeaddr.data)) {
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                } else {
                        msg->resultcode.data = P80211ENUM_resultcode_success;
                }
        } else {
                hfa384x_drvr_ramdl_disable(hw);
                msg->resultcode.data = P80211ENUM_resultcode_success;
        }

        return 0;
}

/*----------------------------------------------------------------
* prism2mgmt_ramdl_write
*
* Writes a buffer to the card RAM using the download state.  This
* is for writing code to card RAM.  To just read or write raw data
* use the aux functions.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
----------------------------------------------------------------*/
int prism2mgmt_ramdl_write(wlandevice_t *wlandev, void *msgp)
{
        hfa384x_t *hw = wlandev->priv;
        struct p80211msg_p2req_ramdl_write *msg = msgp;
        u32 addr;
        u32 len;
        u8 *buf;

        if (wlandev->msdstate != WLAN_MSD_FWLOAD) {
                printk(KERN_ERR
                       "ramdl_write(): may only be called "
                       "in the fwload state.\n");
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
                return 0;
        }

        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        /* first validate the length */
        if (msg->len.data > sizeof(msg->data.data)) {
                msg->resultcode.status =
                    P80211ENUM_resultcode_invalid_parameters;
                return 0;
        }
        /* call the hfa384x function to do the write */
        addr = msg->addr.data;
        len = msg->len.data;
        buf = msg->data.data;
        if (hfa384x_drvr_ramdl_write(hw, addr, buf, len))
                msg->resultcode.data = P80211ENUM_resultcode_refused;

        msg->resultcode.data = P80211ENUM_resultcode_success;

        return 0;
}

/*----------------------------------------------------------------
* prism2mgmt_flashdl_state
*
* Establishes the beginning/end of a card Flash download session.
*
* It is expected that the flashdl_write() function will be called
* one or more times between the 'enable' and 'disable' calls to
* this function.
*
* Note: This function should not be called when a mac comm port
*       is active.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
----------------------------------------------------------------*/
int prism2mgmt_flashdl_state(wlandevice_t *wlandev, void *msgp)
{
        int result = 0;
        hfa384x_t *hw = wlandev->priv;
        struct p80211msg_p2req_flashdl_state *msg = msgp;

        if (wlandev->msdstate != WLAN_MSD_FWLOAD) {
                printk(KERN_ERR
                       "flashdl_state(): may only be called "
                       "in the fwload state.\n");
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
                return 0;
        }

        /*
         ** Note: Interrupts are locked out if this is an AP and are NOT
         ** locked out if this is a station.
         */

        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        if (msg->enable.data == P80211ENUM_truth_true) {
                if (hfa384x_drvr_flashdl_enable(hw)) {
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                } else {
                        msg->resultcode.data = P80211ENUM_resultcode_success;
                }
        } else {
                hfa384x_drvr_flashdl_disable(hw);
                msg->resultcode.data = P80211ENUM_resultcode_success;
                /* NOTE: At this point, the MAC is in the post-reset
                 * state and the driver is in the fwload state.
                 * We need to get the MAC back into the fwload
                 * state.  To do this, we set the nsdstate to HWPRESENT
                 * and then call the ifstate function to redo everything
                 * that got us into the fwload state.
                 */
                wlandev->msdstate = WLAN_MSD_HWPRESENT;
                result = prism2sta_ifstate(wlandev, P80211ENUM_ifstate_fwload);
                if (result != P80211ENUM_resultcode_success) {
                        printk(KERN_ERR "prism2sta_ifstate(fwload) failed,"
                               "P80211ENUM_resultcode=%d\n", result);
                        msg->resultcode.data =
                            P80211ENUM_resultcode_implementation_failure;
                        result = -1;
                }
        }

        return 0;
}

/*----------------------------------------------------------------
* prism2mgmt_flashdl_write
*
*
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
----------------------------------------------------------------*/
int prism2mgmt_flashdl_write(wlandevice_t *wlandev, void *msgp)
{
        hfa384x_t *hw = wlandev->priv;
        struct p80211msg_p2req_flashdl_write *msg = msgp;
        u32 addr;
        u32 len;
        u8 *buf;

        if (wlandev->msdstate != WLAN_MSD_FWLOAD) {
                printk(KERN_ERR
                       "flashdl_write(): may only be called "
                       "in the fwload state.\n");
                msg->resultcode.data =
                    P80211ENUM_resultcode_implementation_failure;
                msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
                return 0;
        }

        /*
         ** Note: Interrupts are locked out if this is an AP and are NOT
         ** locked out if this is a station.
         */

        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        /* first validate the length */
        if (msg->len.data > sizeof(msg->data.data)) {
                msg->resultcode.status =
                    P80211ENUM_resultcode_invalid_parameters;
                return 0;
        }
        /* call the hfa384x function to do the write */
        addr = msg->addr.data;
        len = msg->len.data;
        buf = msg->data.data;
        if (hfa384x_drvr_flashdl_write(hw, addr, buf, len))
                msg->resultcode.data = P80211ENUM_resultcode_refused;

        msg->resultcode.data = P80211ENUM_resultcode_success;

        return 0;
}

/*----------------------------------------------------------------
* prism2mgmt_autojoin
*
* Associate with an ESS.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
*       interrupt
----------------------------------------------------------------*/
int prism2mgmt_autojoin(wlandevice_t *wlandev, void *msgp)
{
        hfa384x_t *hw = wlandev->priv;
        int result = 0;
        u16 reg;
        u16 port_type;
        struct p80211msg_lnxreq_autojoin *msg = msgp;
        p80211pstrd_t *pstr;
        u8 bytebuf[256];
        hfa384x_bytestr_t *p2bytestr = (hfa384x_bytestr_t *) bytebuf;

        wlandev->macmode = WLAN_MACMODE_NONE;

        /* Set the SSID */
        memcpy(&wlandev->ssid, &msg->ssid.data, sizeof(msg->ssid.data));

        /* Disable the Port */
        hfa384x_drvr_disable(hw, 0);

        /*** STATION ***/
        /* Set the TxRates */
        hfa384x_drvr_setconfig16(hw, HFA384x_RID_TXRATECNTL, 0x000f);

        /* Set the auth type */
        if (msg->authtype.data == P80211ENUM_authalg_sharedkey)
                reg = HFA384x_CNFAUTHENTICATION_SHAREDKEY;
        else
                reg = HFA384x_CNFAUTHENTICATION_OPENSYSTEM;

        hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFAUTHENTICATION, reg);

        /* Set the ssid */
        memset(bytebuf, 0, 256);
        pstr = (p80211pstrd_t *) &(msg->ssid.data);
        prism2mgmt_pstr2bytestr(p2bytestr, pstr);
        result = hfa384x_drvr_setconfig(hw, HFA384x_RID_CNFDESIREDSSID,
                                        bytebuf,
                                        HFA384x_RID_CNFDESIREDSSID_LEN);
        port_type = HFA384x_PORTTYPE_BSS;
        /* Set the PortType */
        hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFPORTTYPE, port_type);

        /* Enable the Port */
        hfa384x_drvr_enable(hw, 0);

        /* Set the resultcode */
        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        msg->resultcode.data = P80211ENUM_resultcode_success;

        return result;
}

/*----------------------------------------------------------------
* prism2mgmt_wlansniff
*
* Start or stop sniffing.
*
* Arguments:
*       wlandev         wlan device structure
*       msgp            ptr to msg buffer
*
* Returns:
*       0       success and done
*       <0      success, but we're waiting for something to finish.
*       >0      an error occurred while handling the message.
* Side effects:
*
* Call context:
*       process thread  (usually)
*       interrupt
----------------------------------------------------------------*/
int prism2mgmt_wlansniff(wlandevice_t *wlandev, void *msgp)
{
        int result = 0;
        struct p80211msg_lnxreq_wlansniff *msg = msgp;

        hfa384x_t *hw = wlandev->priv;
        u16 word;

        msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
        switch (msg->enable.data) {
        case P80211ENUM_truth_false:
                /* Confirm that we're in monitor mode */
                if (wlandev->netdev->type == ARPHRD_ETHER) {
                        msg->resultcode.data =
                            P80211ENUM_resultcode_invalid_parameters;
                        result = 0;
                        goto exit;
                }
                /* Disable monitor mode */
                result = hfa384x_cmd_monitor(hw, HFA384x_MONITOR_DISABLE);
                if (result) {
                        pr_debug("failed to disable monitor mode, result=%d\n",
                                 result);
                        goto failed;
                }
                /* Disable port 0 */
                result = hfa384x_drvr_disable(hw, 0);
                if (result) {
                        pr_debug
                        ("failed to disable port 0 after sniffing, result=%d\n",
                             result);
                        goto failed;
                }
                /* Clear the driver state */
                wlandev->netdev->type = ARPHRD_ETHER;

                /* Restore the wepflags */
                result = hfa384x_drvr_setconfig16(hw,
                                                  HFA384x_RID_CNFWEPFLAGS,
                                                  hw->presniff_wepflags);
                if (result) {
                        pr_debug
                            ("failed to restore wepflags=0x%04x, result=%d\n",
                             hw->presniff_wepflags, result);
                        goto failed;
                }

                /* Set the port to its prior type and enable (if necessary) */
                if (hw->presniff_port_type != 0) {
                        word = hw->presniff_port_type;
                        result = hfa384x_drvr_setconfig16(hw,
                                                  HFA384x_RID_CNFPORTTYPE,
                                                  word);
                        if (result) {
                                pr_debug
                                    ("failed to restore porttype, result=%d\n",
                                     result);
                                goto failed;
                        }

                        /* Enable the port */
                        result = hfa384x_drvr_enable(hw, 0);
                        if (result) {
                                pr_debug
                                ("failed to enable port to presniff setting, result=%d\n",
                                     result);
                                goto failed;
                        }
                } else {
                        result = hfa384x_drvr_disable(hw, 0);

                }

                printk(KERN_INFO "monitor mode disabled\n");
                msg->resultcode.data = P80211ENUM_resultcode_success;
                result = 0;
                goto exit;
                break;
        case P80211ENUM_truth_true:
                /* Disable the port (if enabled), only check Port 0 */
                if (hw->port_enabled[0]) {
                        if (wlandev->netdev->type == ARPHRD_ETHER) {
                                /* Save macport 0 state */
                                result = hfa384x_drvr_getconfig16(hw,
                                                  HFA384x_RID_CNFPORTTYPE,
                                                  &(hw->presniff_port_type));
                                if (result) {
                                        pr_debug
                                        ("failed to read porttype, result=%d\n",
                                             result);
                                        goto failed;
                                }
                                /* Save the wepflags state */
                                result = hfa384x_drvr_getconfig16(hw,
                                                  HFA384x_RID_CNFWEPFLAGS,
                                                  &(hw->presniff_wepflags));
                                if (result) {
                                        pr_debug
                                        ("failed to read wepflags, result=%d\n",
                                             result);
                                        goto failed;
                                }
                                hfa384x_drvr_stop(hw);
                                result = hfa384x_drvr_start(hw);
                                if (result) {
                                        pr_debug
                                            ("failed to restart the card for sniffing, result=%d\n",
                                             result);
                                        goto failed;
                                }
                        } else {
                                /* Disable the port */
                                result = hfa384x_drvr_disable(hw, 0);
                                if (result) {
                                        pr_debug
                                            ("failed to enable port for sniffing, result=%d\n",
                                             result);
                                        goto failed;
                                }
                        }
                } else {
                        hw->presniff_port_type = 0;
                }

                /* Set the channel we wish to sniff  */
                word = msg->channel.data;
                result = hfa384x_drvr_setconfig16(hw,
                                                  HFA384x_RID_CNFOWNCHANNEL,
                                                  word);
                hw->sniff_channel = word;

                if (result) {
                        pr_debug("failed to set channel %d, result=%d\n",
                                 word, result);
                        goto failed;
                }

                /* Now if we're already sniffing, we can skip the rest */
                if (wlandev->netdev->type != ARPHRD_ETHER) {
                        /* Set the port type to pIbss */
                        word = HFA384x_PORTTYPE_PSUEDOIBSS;
                        result = hfa384x_drvr_setconfig16(hw,
                                                  HFA384x_RID_CNFPORTTYPE,
                                                  word);
                        if (result) {
                                pr_debug
                                    ("failed to set porttype %d, result=%d\n",
                                     word, result);
                                goto failed;
                        }
                        if ((msg->keepwepflags.status ==
                             P80211ENUM_msgitem_status_data_ok)
                            && (msg->keepwepflags.data !=
                                P80211ENUM_truth_true)) {
                                /* Set the wepflags for no decryption */
                                word = HFA384x_WEPFLAGS_DISABLE_TXCRYPT |
                                    HFA384x_WEPFLAGS_DISABLE_RXCRYPT;
                                result =
                                    hfa384x_drvr_setconfig16(hw,
                                                     HFA384x_RID_CNFWEPFLAGS,
                                                     word);
                        }

                        if (result) {
                                pr_debug
                                  ("failed to set wepflags=0x%04x, result=%d\n",
                                   word, result);
                                goto failed;
                        }
                }

                /* Do we want to strip the FCS in monitor mode? */
                if ((msg->stripfcs.status == P80211ENUM_msgitem_status_data_ok)
                    && (msg->stripfcs.data == P80211ENUM_truth_true)) {
                        hw->sniff_fcs = 0;
                } else {
                        hw->sniff_fcs = 1;
                }

                /* Do we want to truncate the packets? */
                if (msg->packet_trunc.status ==
                    P80211ENUM_msgitem_status_data_ok) {
                        hw->sniff_truncate = msg->packet_trunc.data;
                } else {
                        hw->sniff_truncate = 0;
                }

                /* Enable the port */
                result = hfa384x_drvr_enable(hw, 0);
                if (result) {
                        pr_debug
                            ("failed to enable port for sniffing, result=%d\n",
                             result);
                        goto failed;
                }
                /* Enable monitor mode */
                result = hfa384x_cmd_monitor(hw, HFA384x_MONITOR_ENABLE);
                if (result) {
                        pr_debug("failed to enable monitor mode, result=%d\n",
                                 result);
                        goto failed;
                }

                if (wlandev->netdev->type == ARPHRD_ETHER)
                        printk(KERN_INFO "monitor mode enabled\n");

                /* Set the driver state */
                /* Do we want the prism2 header? */
                if ((msg->prismheader.status ==
                     P80211ENUM_msgitem_status_data_ok)
                    && (msg->prismheader.data == P80211ENUM_truth_true)) {
                        hw->sniffhdr = 0;
                        wlandev->netdev->type = ARPHRD_IEEE80211_PRISM;
                } else
                    if ((msg->wlanheader.status ==
                         P80211ENUM_msgitem_status_data_ok)
                        && (msg->wlanheader.data == P80211ENUM_truth_true)) {
                        hw->sniffhdr = 1;
                        wlandev->netdev->type = ARPHRD_IEEE80211_PRISM;
                } else {
                        wlandev->netdev->type = ARPHRD_IEEE80211;
                }

                msg->resultcode.data = P80211ENUM_resultcode_success;
                result = 0;
                goto exit;
                break;
        default:
                msg->resultcode.data = P80211ENUM_resultcode_invalid_parameters;
                result = 0;
                goto exit;
                break;
        }

failed:
        msg->resultcode.data = P80211ENUM_resultcode_refused;
        result = 0;
exit:
        return result;
}