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 75 static void p80211req_handlemsg(wlandevice_t *wlandev, struct p80211msg *msg); 76 static 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 ----------------------------------------------------------------*/ 96 int 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 ----------------------------------------------------------------*/ 153 static 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 } 179 180 static 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 } 252