diff options
Diffstat (limited to 'drivers/staging/wlan-ng/p80211req.c')
| -rw-r--r-- | drivers/staging/wlan-ng/p80211req.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/drivers/staging/wlan-ng/p80211req.c b/drivers/staging/wlan-ng/p80211req.c new file mode 100644 index 000000000..809cf3d48 --- /dev/null +++ b/drivers/staging/wlan-ng/p80211req.c @@ -0,0 +1,244 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) +/* + * + * Request/Indication/MacMgmt interface handling 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. + * + * -------------------------------------------------------------------- + * + * This file contains the functions, types, and macros to support the + * MLME request interface that's implemented via the device ioctls. + * + * -------------------------------------------------------------------- + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/skbuff.h> +#include <linux/wireless.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <net/sock.h> +#include <linux/netlink.h> + +#include "p80211types.h" +#include "p80211hdr.h" +#include "p80211mgmt.h" +#include "p80211conv.h" +#include "p80211msg.h" +#include "p80211netdev.h" +#include "p80211ioctl.h" +#include "p80211metadef.h" +#include "p80211metastruct.h" +#include "p80211req.h" + +static void p80211req_handlemsg(struct wlandevice *wlandev, + struct p80211msg *msg); +static void p80211req_mibset_mibget(struct wlandevice *wlandev, + struct p80211msg_dot11req_mibget *mib_msg, + int isget); + +static void p80211req_handle_action(struct wlandevice *wlandev, u32 *data, + int isget, u32 flag) +{ + if (isget) { + if (wlandev->hostwep & flag) + *data = P80211ENUM_truth_true; + else + *data = P80211ENUM_truth_false; + } else { + wlandev->hostwep &= ~flag; + if (*data == P80211ENUM_truth_true) + wlandev->hostwep |= flag; + } +} + +/*---------------------------------------------------------------- + * p80211req_dorequest + * + * Handles an MLME request/confirm message. + * + * Arguments: + * wlandev WLAN device struct + * msgbuf Buffer containing a request message + * + * Returns: + * 0 on success, an errno otherwise + * + * Call context: + * Potentially blocks the caller, so it's a good idea to + * not call this function from an interrupt context. + *---------------------------------------------------------------- + */ +int p80211req_dorequest(struct wlandevice *wlandev, u8 *msgbuf) +{ + struct p80211msg *msg = (struct p80211msg *)msgbuf; + + /* Check to make sure the MSD is running */ + if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT && + msg->msgcode == DIDMSG_LNXREQ_IFSTATE) || + wlandev->msdstate == WLAN_MSD_RUNNING || + wlandev->msdstate == WLAN_MSD_FWLOAD)) { + return -ENODEV; + } + + /* Check Permissions */ + if (!capable(CAP_NET_ADMIN) && + (msg->msgcode != DIDMSG_DOT11REQ_MIBGET)) { + netdev_err(wlandev->netdev, + "%s: only dot11req_mibget allowed for non-root.\n", + wlandev->name); + return -EPERM; + } + + /* Check for busy status */ + if (test_and_set_bit(1, &wlandev->request_pending)) + return -EBUSY; + + /* Allow p80211 to look at msg and handle if desired. */ + /* So far, all p80211 msgs are immediate, no waitq/timer necessary */ + /* This may change. */ + p80211req_handlemsg(wlandev, msg); + + /* Pass it down to wlandev via wlandev->mlmerequest */ + if (wlandev->mlmerequest) + wlandev->mlmerequest(wlandev, msg); + + clear_bit(1, &wlandev->request_pending); + return 0; /* if result==0, msg->status still may contain an err */ +} + +/*---------------------------------------------------------------- + * p80211req_handlemsg + * + * p80211 message handler. Primarily looks for messages that + * belong to p80211 and then dispatches the appropriate response. + * TODO: we don't do anything yet. Once the linuxMIB is better + * defined we'll need a get/set handler. + * + * Arguments: + * wlandev WLAN device struct + * msg message structure + * + * Returns: + * nothing (any results are set in the status field of the msg) + * + * Call context: + * Process thread + *---------------------------------------------------------------- + */ +static void p80211req_handlemsg(struct wlandevice *wlandev, + struct p80211msg *msg) +{ + switch (msg->msgcode) { + case DIDMSG_LNXREQ_HOSTWEP: { + struct p80211msg_lnxreq_hostwep *req = + (struct p80211msg_lnxreq_hostwep *)msg; + wlandev->hostwep &= + ~(HOSTWEP_DECRYPT | HOSTWEP_ENCRYPT); + if (req->decrypt.data == P80211ENUM_truth_true) + wlandev->hostwep |= HOSTWEP_DECRYPT; + if (req->encrypt.data == P80211ENUM_truth_true) + wlandev->hostwep |= HOSTWEP_ENCRYPT; + + break; + } + case DIDMSG_DOT11REQ_MIBGET: + case DIDMSG_DOT11REQ_MIBSET: { + int isget = (msg->msgcode == DIDMSG_DOT11REQ_MIBGET); + struct p80211msg_dot11req_mibget *mib_msg = + (struct p80211msg_dot11req_mibget *)msg; + p80211req_mibset_mibget(wlandev, mib_msg, isget); + break; + } + } /* switch msg->msgcode */ +} + +static void p80211req_mibset_mibget(struct wlandevice *wlandev, + struct p80211msg_dot11req_mibget *mib_msg, + int isget) +{ + struct p80211itemd *mibitem = + (struct p80211itemd *)mib_msg->mibattribute.data; + struct p80211pstrd *pstr = (struct p80211pstrd *)mibitem->data; + u8 *key = mibitem->data + sizeof(struct p80211pstrd); + + switch (mibitem->did) { + case didmib_dot11smt_wepdefaultkeystable_key(1): + case didmib_dot11smt_wepdefaultkeystable_key(2): + case didmib_dot11smt_wepdefaultkeystable_key(3): + case didmib_dot11smt_wepdefaultkeystable_key(4): + if (!isget) + wep_change_key(wlandev, + P80211DID_ITEM(mibitem->did) - 1, + key, pstr->len); + break; + + case DIDMIB_DOT11SMT_PRIVACYTABLE_WEPDEFAULTKEYID: { + u32 *data = (u32 *)mibitem->data; + + if (isget) { + *data = wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK; + } else { + wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK); + wlandev->hostwep |= (*data & HOSTWEP_DEFAULTKEY_MASK); + } + break; + } + case DIDMIB_DOT11SMT_PRIVACYTABLE_PRIVACYINVOKED: { + u32 *data = (u32 *)mibitem->data; + + p80211req_handle_action(wlandev, data, isget, + HOSTWEP_PRIVACYINVOKED); + break; + } + case DIDMIB_DOT11SMT_PRIVACYTABLE_EXCLUDEUNENCRYPTED: { + u32 *data = (u32 *)mibitem->data; + + p80211req_handle_action(wlandev, data, isget, + HOSTWEP_EXCLUDEUNENCRYPTED); + break; + } + } +} |