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 request/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	struct p80211msg *msg = (struct p80211msg *) msgbuf;
99
100	/* Check to make sure the MSD is running */
101	if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
102	       msg->msgcode == DIDmsg_lnxreq_ifstate) ||
103	      wlandev->msdstate == WLAN_MSD_RUNNING ||
104	      wlandev->msdstate == WLAN_MSD_FWLOAD)) {
105		return -ENODEV;
106	}
107
108	/* Check Permissions */
109	if (!capable(CAP_NET_ADMIN) &&
110	(msg->msgcode != DIDmsg_dot11req_mibget)) {
111		netdev_err(wlandev->netdev,
112			   "%s: only dot11req_mibget allowed for non-root.\n",
113			   wlandev->name);
114		return -EPERM;
115	}
116
117	/* Check for busy status */
118	if (test_and_set_bit(1, &(wlandev->request_pending)))
119		return -EBUSY;
120
121	/* Allow p80211 to look at msg and handle if desired. */
122	/* So far, all p80211 msgs are immediate, no waitq/timer necessary */
123	/* This may change. */
124	p80211req_handlemsg(wlandev, msg);
125
126	/* Pass it down to wlandev via wlandev->mlmerequest */
127	if (wlandev->mlmerequest != NULL)
128		wlandev->mlmerequest(wlandev, msg);
129
130	clear_bit(1, &(wlandev->request_pending));
131	return 0;	/* if result==0, msg->status still may contain an err */
132}
133
134/*----------------------------------------------------------------
135* p80211req_handlemsg
136*
137* p80211 message handler.  Primarily looks for messages that
138* belong to p80211 and then dispatches the appropriate response.
139* TODO: we don't do anything yet.  Once the linuxMIB is better
140*	defined we'll need a get/set handler.
141*
142* Arguments:
143*	wlandev		WLAN device struct
144*	msg		message structure
145*
146* Returns:
147*	nothing (any results are set in the status field of the msg)
148*
149* Call context:
150*	Process thread
151----------------------------------------------------------------*/
152static void p80211req_handlemsg(wlandevice_t *wlandev, struct p80211msg *msg)
153{
154	switch (msg->msgcode) {
155
156	case DIDmsg_lnxreq_hostwep:{
157		struct p80211msg_lnxreq_hostwep *req =
158			(struct p80211msg_lnxreq_hostwep *) msg;
159		wlandev->hostwep &=
160				~(HOSTWEP_DECRYPT | HOSTWEP_ENCRYPT);
161		if (req->decrypt.data == P80211ENUM_truth_true)
162			wlandev->hostwep |= HOSTWEP_DECRYPT;
163		if (req->encrypt.data == P80211ENUM_truth_true)
164			wlandev->hostwep |= HOSTWEP_ENCRYPT;
165
166	break;
167	}
168	case DIDmsg_dot11req_mibget:
169	case DIDmsg_dot11req_mibset:{
170		int isget = (msg->msgcode == DIDmsg_dot11req_mibget);
171		struct p80211msg_dot11req_mibget *mib_msg =
172			(struct p80211msg_dot11req_mibget *) msg;
173		p80211req_mibset_mibget(wlandev, mib_msg, isget);
174	break;
175	}
176	}			/* switch msg->msgcode */
177}
178
179static void p80211req_mibset_mibget(wlandevice_t *wlandev,
180				   struct p80211msg_dot11req_mibget *mib_msg,
181				   int isget)
182{
183	p80211itemd_t *mibitem = (p80211itemd_t *) mib_msg->mibattribute.data;
184	p80211pstrd_t *pstr = (p80211pstrd_t *) mibitem->data;
185	u8 *key = mibitem->data + sizeof(p80211pstrd_t);
186
187	switch (mibitem->did) {
188	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey0:{
189		if (!isget)
190			wep_change_key(wlandev, 0, key, pstr->len);
191	break;
192	}
193	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey1:{
194		if (!isget)
195			wep_change_key(wlandev, 1, key, pstr->len);
196	break;
197	}
198	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey2:{
199		if (!isget)
200			wep_change_key(wlandev, 2, key, pstr->len);
201	break;
202	}
203	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey3:{
204		if (!isget)
205			wep_change_key(wlandev, 3, key, pstr->len);
206	break;
207	}
208	case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID:{
209		u32 *data = (u32 *) mibitem->data;
210
211		if (isget) {
212			*data = wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
213		} else {
214			wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
215			wlandev->hostwep |= (*data & HOSTWEP_DEFAULTKEY_MASK);
216		}
217	break;
218	}
219	case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
220		u32 *data = (u32 *) mibitem->data;
221
222		if (isget) {
223			if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
224				*data = P80211ENUM_truth_true;
225			else
226				*data = P80211ENUM_truth_false;
227		} else {
228			wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
229			if (*data == P80211ENUM_truth_true)
230				wlandev->hostwep |= HOSTWEP_PRIVACYINVOKED;
231		}
232	break;
233	}
234	case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
235		u32 *data = (u32 *) mibitem->data;
236
237		if (isget) {
238			if (wlandev->hostwep & HOSTWEP_EXCLUDEUNENCRYPTED)
239				*data = P80211ENUM_truth_true;
240			else
241				*data = P80211ENUM_truth_false;
242		} else {
243			wlandev->hostwep &= ~(HOSTWEP_EXCLUDEUNENCRYPTED);
244			if (*data == P80211ENUM_truth_true)
245				wlandev->hostwep |= HOSTWEP_EXCLUDEUNENCRYPTED;
246		}
247	break;
248	}
249	}
250}
251