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 55 static void p80211req_handlemsg(struct wlandevice *wlandev, 56 struct p80211msg *msg); 57 static void p80211req_mibset_mibget(struct wlandevice *wlandev, 58 struct p80211msg_dot11req_mibget *mib_msg, 59 int isget); 60 61 static 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 */ 93 int 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 */ 150 static 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 } 176 177 static 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 } 224