Root/drivers/staging/wlan-ng/p80211req.c

1/* src/p80211/p80211req.c
2*
3* Request/Indication/MacMgmt interface handling functions
4*
5* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
6* --------------------------------------------------------------------
7*
8* linux-wlan
9*
10* The contents of this file are subject to the Mozilla Public
11* License Version 1.1 (the "License"); you may not use this file
12* except in compliance with the License. You may obtain a copy of
13* the License at http://www.mozilla.org/MPL/
14*
15* Software distributed under the License is distributed on an "AS
16* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
17* implied. See the License for the specific language governing
18* rights and limitations under the License.
19*
20* Alternatively, the contents of this file may be used under the
21* terms of the GNU Public License version 2 (the "GPL"), in which
22* case the provisions of the GPL are applicable instead of the
23* above. If you wish to allow the use of your version of this file
24* only under the terms of the GPL and not to allow others to use
25* your version of this file under the MPL, indicate your decision
26* by deleting the provisions above and replace them with the notice
27* and other provisions required by the GPL. If you do not delete
28* the provisions above, a recipient may use your version of this
29* file under either the MPL or the GPL.
30*
31* --------------------------------------------------------------------
32*
33* Inquiries regarding the linux-wlan Open Source project can be
34* made directly to:
35*
36* AbsoluteValue Systems Inc.
37* info@linux-wlan.com
38* http://www.linux-wlan.com
39*
40* --------------------------------------------------------------------
41*
42* Portions of the development of this software were funded by
43* Intersil Corporation as part of PRISM(R) chipset product development.
44*
45* --------------------------------------------------------------------
46*
47* This file contains the functions, types, and macros to support the
48* MLME request interface that's implemented via the device ioctls.
49*
50* --------------------------------------------------------------------
51*/
52
53#include <linux/module.h>
54#include <linux/kernel.h>
55#include <linux/sched.h>
56#include <linux/types.h>
57#include <linux/skbuff.h>
58#include <linux/wireless.h>
59#include <linux/netdevice.h>
60#include <linux/etherdevice.h>
61#include <net/sock.h>
62#include <linux/netlink.h>
63
64#include "p80211types.h"
65#include "p80211hdr.h"
66#include "p80211mgmt.h"
67#include "p80211conv.h"
68#include "p80211msg.h"
69#include "p80211netdev.h"
70#include "p80211ioctl.h"
71#include "p80211metadef.h"
72#include "p80211metastruct.h"
73#include "p80211req.h"
74
75static void p80211req_handlemsg(wlandevice_t *wlandev, struct p80211msg *msg);
76static int p80211req_mibset_mibget(wlandevice_t *wlandev,
77                   struct p80211msg_dot11req_mibget *mib_msg,
78                   int isget);
79
80/*----------------------------------------------------------------
81* p80211req_dorequest
82*
83* Handles an MLME reqest/confirm message.
84*
85* Arguments:
86* wlandev WLAN device struct
87* msgbuf Buffer containing a request message
88*
89* Returns:
90* 0 on success, an errno otherwise
91*
92* Call context:
93* Potentially blocks the caller, so it's a good idea to
94* not call this function from an interrupt context.
95----------------------------------------------------------------*/
96int p80211req_dorequest(wlandevice_t *wlandev, u8 *msgbuf)
97{
98    int result = 0;
99    struct p80211msg *msg = (struct p80211msg *) msgbuf;
100
101    /* Check to make sure the MSD is running */
102    if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
103           msg->msgcode == DIDmsg_lnxreq_ifstate) ||
104          wlandev->msdstate == WLAN_MSD_RUNNING ||
105          wlandev->msdstate == WLAN_MSD_FWLOAD)) {
106        return -ENODEV;
107    }
108
109    /* Check Permissions */
110    if (!capable(CAP_NET_ADMIN) &&
111    (msg->msgcode != DIDmsg_dot11req_mibget)) {
112        printk(KERN_ERR
113               "%s: only dot11req_mibget allowed for non-root.\n",
114               wlandev->name);
115        return -EPERM;
116    }
117
118    /* Check for busy status */
119    if (test_and_set_bit(1, &(wlandev->request_pending)))
120        return -EBUSY;
121
122    /* Allow p80211 to look at msg and handle if desired. */
123    /* So far, all p80211 msgs are immediate, no waitq/timer necessary */
124    /* This may change. */
125    p80211req_handlemsg(wlandev, msg);
126
127    /* Pass it down to wlandev via wlandev->mlmerequest */
128    if (wlandev->mlmerequest != NULL)
129        wlandev->mlmerequest(wlandev, msg);
130
131    clear_bit(1, &(wlandev->request_pending));
132    return result; /* if result==0, msg->status still may contain an err */
133}
134
135/*----------------------------------------------------------------
136* p80211req_handlemsg
137*
138* p80211 message handler. Primarily looks for messages that
139* belong to p80211 and then dispatches the appropriate response.
140* TODO: we don't do anything yet. Once the linuxMIB is better
141* defined we'll need a get/set handler.
142*
143* Arguments:
144* wlandev WLAN device struct
145* msg message structure
146*
147* Returns:
148* nothing (any results are set in the status field of the msg)
149*
150* Call context:
151* Process thread
152----------------------------------------------------------------*/
153static void p80211req_handlemsg(wlandevice_t *wlandev, struct p80211msg *msg)
154{
155    switch (msg->msgcode) {
156
157    case DIDmsg_lnxreq_hostwep:{
158            struct p80211msg_lnxreq_hostwep *req =
159                (struct p80211msg_lnxreq_hostwep *) msg;
160            wlandev->hostwep &=
161                ~(HOSTWEP_DECRYPT | HOSTWEP_ENCRYPT);
162            if (req->decrypt.data == P80211ENUM_truth_true)
163                wlandev->hostwep |= HOSTWEP_DECRYPT;
164            if (req->encrypt.data == P80211ENUM_truth_true)
165                wlandev->hostwep |= HOSTWEP_ENCRYPT;
166
167            break;
168        }
169    case DIDmsg_dot11req_mibget:
170    case DIDmsg_dot11req_mibset:{
171            int isget = (msg->msgcode == DIDmsg_dot11req_mibget);
172            struct p80211msg_dot11req_mibget *mib_msg =
173                (struct p80211msg_dot11req_mibget *) msg;
174            p80211req_mibset_mibget(wlandev, mib_msg, isget);
175        }
176    default:
177        ;
178    } /* switch msg->msgcode */
179
180    return;
181}
182
183static int p80211req_mibset_mibget(wlandevice_t *wlandev,
184                   struct p80211msg_dot11req_mibget *mib_msg,
185                   int isget)
186{
187    p80211itemd_t *mibitem = (p80211itemd_t *) mib_msg->mibattribute.data;
188    p80211pstrd_t *pstr = (p80211pstrd_t *) mibitem->data;
189    u8 *key = mibitem->data + sizeof(p80211pstrd_t);
190
191    switch (mibitem->did) {
192    case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey0:{
193            if (!isget)
194                wep_change_key(wlandev, 0, key, pstr->len);
195            break;
196        }
197    case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey1:{
198            if (!isget)
199                wep_change_key(wlandev, 1, key, pstr->len);
200            break;
201        }
202    case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey2:{
203            if (!isget)
204                wep_change_key(wlandev, 2, key, pstr->len);
205            break;
206        }
207    case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey3:{
208            if (!isget)
209                wep_change_key(wlandev, 3, key, pstr->len);
210            break;
211        }
212    case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID:{
213            u32 *data = (u32 *) mibitem->data;
214
215            if (isget) {
216                *data =
217                    wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
218            } else {
219                wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
220
221                wlandev->hostwep |=
222                    (*data & HOSTWEP_DEFAULTKEY_MASK);
223            }
224            break;
225        }
226    case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
227            u32 *data = (u32 *) mibitem->data;
228
229            if (isget) {
230                if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
231                    *data = P80211ENUM_truth_true;
232                else
233                    *data = P80211ENUM_truth_false;
234            } else {
235                wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
236                if (*data == P80211ENUM_truth_true)
237                    wlandev->hostwep |=
238                        HOSTWEP_PRIVACYINVOKED;
239            }
240            break;
241        }
242    case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
243            u32 *data = (u32 *) mibitem->data;
244
245            if (isget) {
246                if (wlandev->hostwep &
247                    HOSTWEP_EXCLUDEUNENCRYPTED)
248                    *data = P80211ENUM_truth_true;
249                else
250                    *data = P80211ENUM_truth_false;
251            } else {
252                wlandev->hostwep &=
253                    ~(HOSTWEP_EXCLUDEUNENCRYPTED);
254                if (*data == P80211ENUM_truth_true)
255                    wlandev->hostwep |=
256                        HOSTWEP_EXCLUDEUNENCRYPTED;
257            }
258            break;
259        }
260    default:
261        ;
262    }
263
264    return 0;
265}
266

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