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1// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1)
2/*
3 *
4 * Request/Indication/MacMgmt interface handling functions
5 *
6 * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
7 * --------------------------------------------------------------------
8 *
9 * linux-wlan
10 *
11 * --------------------------------------------------------------------
12 *
13 * Inquiries regarding the linux-wlan Open Source project can be
14 * made directly to:
15 *
16 * AbsoluteValue Systems Inc.
17 * info@linux-wlan.com
18 * http://www.linux-wlan.com
19 *
20 * --------------------------------------------------------------------
21 *
22 * Portions of the development of this software were funded by
23 * Intersil Corporation as part of PRISM(R) chipset product development.
24 *
25 * --------------------------------------------------------------------
26 *
27 * This file contains the functions, types, and macros to support the
28 * MLME request interface that's implemented via the device ioctls.
29 *
30 * --------------------------------------------------------------------
31 */
32
33#include <linux/module.h>
34#include <linux/kernel.h>
35#include <linux/sched.h>
36#include <linux/types.h>
37#include <linux/skbuff.h>
38#include <linux/wireless.h>
39#include <linux/netdevice.h>
40#include <linux/etherdevice.h>
41#include <net/sock.h>
42#include <linux/netlink.h>
43
44#include "p80211types.h"
45#include "p80211hdr.h"
46#include "p80211mgmt.h"
47#include "p80211conv.h"
48#include "p80211msg.h"
49#include "p80211netdev.h"
50#include "p80211ioctl.h"
51#include "p80211metadef.h"
52#include "p80211metastruct.h"
53#include "p80211req.h"
54
55static void p80211req_handlemsg(struct wlandevice *wlandev,
56 struct p80211msg *msg);
57static void p80211req_mibset_mibget(struct wlandevice *wlandev,
58 struct p80211msg_dot11req_mibget *mib_msg,
59 int isget);
60
61static void p80211req_handle_action(struct wlandevice *wlandev, u32 *data,
62 int isget, u32 flag)
63{
64 if (isget) {
65 if (wlandev->hostwep & flag)
66 *data = P80211ENUM_truth_true;
67 else
68 *data = P80211ENUM_truth_false;
69 } else {
70 wlandev->hostwep &= ~flag;
71 if (*data == P80211ENUM_truth_true)
72 wlandev->hostwep |= flag;
73 }
74}
75
76/*----------------------------------------------------------------
77 * p80211req_dorequest
78 *
79 * Handles an MLME request/confirm message.
80 *
81 * Arguments:
82 * wlandev WLAN device struct
83 * msgbuf Buffer containing a request message
84 *
85 * Returns:
86 * 0 on success, an errno otherwise
87 *
88 * Call context:
89 * Potentially blocks the caller, so it's a good idea to
90 * not call this function from an interrupt context.
91 *----------------------------------------------------------------
92 */
93int p80211req_dorequest(struct wlandevice *wlandev, u8 *msgbuf)
94{
95 struct p80211msg *msg = (struct p80211msg *)msgbuf;
96
97 /* Check to make sure the MSD is running */
98 if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
99 msg->msgcode == DIDMSG_LNXREQ_IFSTATE) ||
100 wlandev->msdstate == WLAN_MSD_RUNNING ||
101 wlandev->msdstate == WLAN_MSD_FWLOAD)) {
102 return -ENODEV;
103 }
104
105 /* Check Permissions */
106 if (!capable(CAP_NET_ADMIN) &&
107 (msg->msgcode != DIDMSG_DOT11REQ_MIBGET)) {
108 netdev_err(wlandev->netdev,
109 "%s: only dot11req_mibget allowed for non-root.\n",
110 wlandev->name);
111 return -EPERM;
112 }
113
114 /* Check for busy status */
115 if (test_and_set_bit(1, &wlandev->request_pending))
116 return -EBUSY;
117
118 /* Allow p80211 to look at msg and handle if desired. */
119 /* So far, all p80211 msgs are immediate, no waitq/timer necessary */
120 /* This may change. */
121 p80211req_handlemsg(wlandev, msg);
122
123 /* Pass it down to wlandev via wlandev->mlmerequest */
124 if (wlandev->mlmerequest)
125 wlandev->mlmerequest(wlandev, msg);
126
127 clear_bit(1, &wlandev->request_pending);
128 return 0; /* if result==0, msg->status still may contain an err */
129}
130
131/*----------------------------------------------------------------
132 * p80211req_handlemsg
133 *
134 * p80211 message handler. Primarily looks for messages that
135 * belong to p80211 and then dispatches the appropriate response.
136 * TODO: we don't do anything yet. Once the linuxMIB is better
137 * defined we'll need a get/set handler.
138 *
139 * Arguments:
140 * wlandev WLAN device struct
141 * msg message structure
142 *
143 * Returns:
144 * nothing (any results are set in the status field of the msg)
145 *
146 * Call context:
147 * Process thread
148 *----------------------------------------------------------------
149 */
150static void p80211req_handlemsg(struct wlandevice *wlandev,
151 struct p80211msg *msg)
152{
153 switch (msg->msgcode) {
154 case DIDMSG_LNXREQ_HOSTWEP: {
155 struct p80211msg_lnxreq_hostwep *req =
156 (struct p80211msg_lnxreq_hostwep *)msg;
157 wlandev->hostwep &=
158 ~(HOSTWEP_DECRYPT | HOSTWEP_ENCRYPT);
159 if (req->decrypt.data == P80211ENUM_truth_true)
160 wlandev->hostwep |= HOSTWEP_DECRYPT;
161 if (req->encrypt.data == P80211ENUM_truth_true)
162 wlandev->hostwep |= HOSTWEP_ENCRYPT;
163
164 break;
165 }
166 case DIDMSG_DOT11REQ_MIBGET:
167 case DIDMSG_DOT11REQ_MIBSET: {
168 int isget = (msg->msgcode == DIDMSG_DOT11REQ_MIBGET);
169 struct p80211msg_dot11req_mibget *mib_msg =
170 (struct p80211msg_dot11req_mibget *)msg;
171 p80211req_mibset_mibget(wlandev, mib_msg, isget);
172 break;
173 }
174 } /* switch msg->msgcode */
175}
176
177static void p80211req_mibset_mibget(struct wlandevice *wlandev,
178 struct p80211msg_dot11req_mibget *mib_msg,
179 int isget)
180{
181 struct p80211itemd *mibitem =
182 (struct p80211itemd *)mib_msg->mibattribute.data;
183 struct p80211pstrd *pstr = (struct p80211pstrd *)mibitem->data;
184 u8 *key = mibitem->data + sizeof(struct p80211pstrd);
185
186 switch (mibitem->did) {
187 case didmib_dot11smt_wepdefaultkeystable_key(1):
188 case didmib_dot11smt_wepdefaultkeystable_key(2):
189 case didmib_dot11smt_wepdefaultkeystable_key(3):
190 case didmib_dot11smt_wepdefaultkeystable_key(4):
191 if (!isget)
192 wep_change_key(wlandev,
193 P80211DID_ITEM(mibitem->did) - 1,
194 key, pstr->len);
195 break;
196
197 case DIDMIB_DOT11SMT_PRIVACYTABLE_WEPDEFAULTKEYID: {
198 u32 *data = (u32 *)mibitem->data;
199
200 if (isget) {
201 *data = wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
202 } else {
203 wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
204 wlandev->hostwep |= (*data & HOSTWEP_DEFAULTKEY_MASK);
205 }
206 break;
207 }
208 case DIDMIB_DOT11SMT_PRIVACYTABLE_PRIVACYINVOKED: {
209 u32 *data = (u32 *)mibitem->data;
210
211 p80211req_handle_action(wlandev, data, isget,
212 HOSTWEP_PRIVACYINVOKED);
213 break;
214 }
215 case DIDMIB_DOT11SMT_PRIVACYTABLE_EXCLUDEUNENCRYPTED: {
216 u32 *data = (u32 *)mibitem->data;
217
218 p80211req_handle_action(wlandev, data, isget,
219 HOSTWEP_EXCLUDEUNENCRYPTED);
220 break;
221 }
222 }
223}
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 void 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 break;
176 }
177 } /* switch msg->msgcode */
178}
179
180static void p80211req_mibset_mibget(wlandevice_t *wlandev,
181 struct p80211msg_dot11req_mibget *mib_msg,
182 int isget)
183{
184 p80211itemd_t *mibitem = (p80211itemd_t *) mib_msg->mibattribute.data;
185 p80211pstrd_t *pstr = (p80211pstrd_t *) mibitem->data;
186 u8 *key = mibitem->data + sizeof(p80211pstrd_t);
187
188 switch (mibitem->did) {
189 case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey0:{
190 if (!isget)
191 wep_change_key(wlandev, 0, key, pstr->len);
192 break;
193 }
194 case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey1:{
195 if (!isget)
196 wep_change_key(wlandev, 1, key, pstr->len);
197 break;
198 }
199 case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey2:{
200 if (!isget)
201 wep_change_key(wlandev, 2, key, pstr->len);
202 break;
203 }
204 case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey3:{
205 if (!isget)
206 wep_change_key(wlandev, 3, key, pstr->len);
207 break;
208 }
209 case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID:{
210 u32 *data = (u32 *) mibitem->data;
211
212 if (isget) {
213 *data = wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
214 } else {
215 wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
216 wlandev->hostwep |= (*data & HOSTWEP_DEFAULTKEY_MASK);
217 }
218 break;
219 }
220 case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
221 u32 *data = (u32 *) mibitem->data;
222
223 if (isget) {
224 if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
225 *data = P80211ENUM_truth_true;
226 else
227 *data = P80211ENUM_truth_false;
228 } else {
229 wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
230 if (*data == P80211ENUM_truth_true)
231 wlandev->hostwep |= HOSTWEP_PRIVACYINVOKED;
232 }
233 break;
234 }
235 case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
236 u32 *data = (u32 *) mibitem->data;
237
238 if (isget) {
239 if (wlandev->hostwep & HOSTWEP_EXCLUDEUNENCRYPTED)
240 *data = P80211ENUM_truth_true;
241 else
242 *data = P80211ENUM_truth_false;
243 } else {
244 wlandev->hostwep &= ~(HOSTWEP_EXCLUDEUNENCRYPTED);
245 if (*data == P80211ENUM_truth_true)
246 wlandev->hostwep |= HOSTWEP_EXCLUDEUNENCRYPTED;
247 }
248 break;
249 }
250 }
251}