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