drivers/staging/csr/wext_events.c

   1 /*
   2  * ---------------------------------------------------------------------------
   3  * FILE:     wext_events.c
   4  *
   5  * PURPOSE:
   6  *      Code to generate iwevents.
   7  *
   8  * Copyright (C) 2006-2008 by Cambridge Silicon Radio Ltd.
   9  *
  10  * Refer to LICENSE.txt included with this source code for details on
  11  * the license terms.
  12  *
  13  * ---------------------------------------------------------------------------
  14  */
  15 #include <linux/types.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/if_arp.h>
  18 #include "csr_wifi_hip_unifi.h"
  19 #include "unifi_priv.h"
  20
  21
  22
  23 /*
  24  * ---------------------------------------------------------------------------
  25  *  wext_send_assoc_event
  26  *
  27  *      Send wireless-extension events up to userland to announce
  28  *      successful association with an AP.
  29  *
  30  *  Arguments:
  31  *      priv                    Pointer to driver context.
  32  *      bssid                   MAC address of AP we associated with
  33  *      req_ie, req_ie_len      IEs in the original request
  34  *      resp_ie, resp_ie_len    IEs in the response
  35  *
  36  *  Returns:
  37  *      None.
  38  *
  39  *  Notes:
  40  *      This is sent on first successful association, and again if we
  41  *      roam to another AP.
  42  * ---------------------------------------------------------------------------
  43  */
  44 void
  45 wext_send_assoc_event(unifi_priv_t *priv, unsigned char *bssid,
  46                       unsigned char *req_ie, int req_ie_len,
  47                       unsigned char *resp_ie, int resp_ie_len,
  48                       unsigned char *scan_ie, unsigned int scan_ie_len)
  49 {
  50 #if WIRELESS_EXT > 17
  51     union iwreq_data wrqu;
  52
  53     if (req_ie_len == 0) req_ie = NULL;
  54     wrqu.data.length = req_ie_len;
  55     wrqu.data.flags = 0;
  56     wireless_send_event(priv->netdev[CSR_WIFI_INTERFACE_IN_USE], IWEVASSOCREQIE, &wrqu, req_ie);
  57
  58     if (resp_ie_len == 0) resp_ie = NULL;
  59     wrqu.data.length = resp_ie_len;
  60     wrqu.data.flags = 0;
  61     wireless_send_event(priv->netdev[CSR_WIFI_INTERFACE_IN_USE], IWEVASSOCRESPIE, &wrqu, resp_ie);
  62
  63     if (scan_ie_len > 0) {
  64         wrqu.data.length = scan_ie_len;
  65         wrqu.data.flags = 0;
  66         wireless_send_event(priv->netdev[CSR_WIFI_INTERFACE_IN_USE], IWEVGENIE, &wrqu, scan_ie);
  67     }
  68
  69     memcpy(&wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
  70     wireless_send_event(priv->netdev[CSR_WIFI_INTERFACE_IN_USE], SIOCGIWAP, &wrqu, NULL);
  71 #endif
  72 } /* wext_send_assoc_event() */
  73
  74
  75
  76 /*
  77  * ---------------------------------------------------------------------------
  78  *  wext_send_disassoc_event
  79  *
  80  *      Send a wireless-extension event up to userland to announce
  81  *      that we disassociated from an AP.
  82  *
  83  *  Arguments:
  84  *      priv                    Pointer to driver context.
  85  *
  86  *  Returns:
  87  *      None.
  88  *
  89  *  Notes:
  90  *      The semantics of wpa_supplicant (the userland SME application) are
  91  *      that a SIOCGIWAP event with MAC address of all zero means
  92  *      disassociate.
  93  * ---------------------------------------------------------------------------
  94  */
  95 void
  96 wext_send_disassoc_event(unifi_priv_t *priv)
  97 {
  98 #if WIRELESS_EXT > 17
  99     union iwreq_data wrqu;
 100
 101     memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
 102     wireless_send_event(priv->netdev[CSR_WIFI_INTERFACE_IN_USE], SIOCGIWAP, &wrqu, NULL);
 103 #endif
 104 } /* wext_send_disassoc_event() */
 105
 106
 107
 108 /*
 109  * ---------------------------------------------------------------------------
 110  *  wext_send_scan_results_event
 111  *
 112  *      Send wireless-extension events up to userland to announce
 113  *      completion of a scan.
 114  *
 115  *  Arguments:
 116  *      priv                    Pointer to driver context.
 117  *
 118  *  Returns:
 119  *      None.
 120  *
 121  *  Notes:
 122  *      This doesn't actually report the results, they are retrieved
 123  *      using the SIOCGIWSCAN ioctl command.
 124  * ---------------------------------------------------------------------------
 125  */
 126 void
 127 wext_send_scan_results_event(unifi_priv_t *priv)
 128 {
 129 #if WIRELESS_EXT > 17
 130     union iwreq_data wrqu;
 131
 132     wrqu.data.length = 0;
 133     wrqu.data.flags = 0;
 134     wireless_send_event(priv->netdev[CSR_WIFI_INTERFACE_IN_USE], SIOCGIWSCAN, &wrqu, NULL);
 135
 136 #endif
 137 } /* wext_send_scan_results_event() */
 138
 139
 140
 141 /*
 142  * ---------------------------------------------------------------------------
 143  *  wext_send_michaelmicfailure_event
 144  *
 145  *      Send wireless-extension events up to userland to announce
 146  *      completion of a scan.
 147  *
 148  *  Arguments:
 149  *      priv            Pointer to driver context.
 150  *      count, macaddr, key_type, key_idx, tsc
 151  *                      Parameters from report from UniFi.
 152  *
 153  *  Returns:
 154  *      None.
 155  * ---------------------------------------------------------------------------
 156  */
 157 #if WIRELESS_EXT >= 18
 158 static inline void
 159 _send_michaelmicfailure_event(struct net_device *dev,
 160                               int count, const unsigned char *macaddr,
 161                               int key_type, int key_idx,
 162                               unsigned char *tsc)
 163 {
 164     union iwreq_data wrqu;
 165     struct iw_michaelmicfailure mmf;
 166
 167     memset(&mmf, 0, sizeof(mmf));
 168
 169     mmf.flags = key_idx & IW_MICFAILURE_KEY_ID;
 170     if (key_type == CSR_GROUP) {
 171         mmf.flags |= IW_MICFAILURE_GROUP;
 172     } else {
 173         mmf.flags |= IW_MICFAILURE_PAIRWISE;
 174     }
 175     mmf.flags |= ((count << 5) & IW_MICFAILURE_COUNT);
 176
 177     mmf.src_addr.sa_family = ARPHRD_ETHER;
 178     memcpy(mmf.src_addr.sa_data, macaddr, ETH_ALEN);
 179
 180     memcpy(mmf.tsc, tsc, IW_ENCODE_SEQ_MAX_SIZE);
 181
 182     memset(&wrqu, 0, sizeof(wrqu));
 183     wrqu.data.length = sizeof(mmf);
 184
 185     wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, (char *)&mmf);
 186 }
 187 #elif WIRELESS_EXT >= 15
 188 static inline void
 189 _send_michaelmicfailure_event(struct net_device *dev,
 190                               int count, const unsigned char *macaddr,
 191                               int key_type, int key_idx,
 192                               unsigned char *tsc)
 193 {
 194     union iwreq_data wrqu;
 195     char buf[128];
 196
 197         sprintf(buf,
 198                 "MLME-MICHAELMICFAILURE.indication(keyid=%d %scast addr=%pM)",
 199                 key_idx, (key_type == CSR_GROUP) ? "broad" : "uni", macaddr);
 200     memset(&wrqu, 0, sizeof(wrqu));
 201     wrqu.data.length = strlen(buf);
 202     wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 203 }
 204 #else /* WIRELESS_EXT >= 15 */
 205 static inline void
 206 _send_michaelmicfailure_event(struct net_device *dev,
 207                               int count, const unsigned char *macaddr,
 208                               int key_type, int key_idx,
 209                               unsigned char *tsc)
 210 {
 211     /* Not supported before WEXT 15 */
 212 }
 213 #endif /* WIRELESS_EXT >= 15 */
 214
 215
 216 void
 217 wext_send_michaelmicfailure_event(unifi_priv_t *priv,
 218                                   u16 count,
 219                                   CsrWifiMacAddress address,
 220                                   CsrWifiSmeKeyType keyType,
 221                                   u16 interfaceTag)
 222 {
 223     unsigned char tsc[8] = {0};
 224
 225     if (interfaceTag >= CSR_WIFI_NUM_INTERFACES) {
 226         unifi_error(priv, "wext_send_michaelmicfailure_event bad interfaceTag\n");
 227         return;
 228     }
 229
 230     _send_michaelmicfailure_event(priv->netdev[interfaceTag],
 231                                   count,
 232                                   address.a,
 233                                   keyType,
 234                                   0,
 235                                   tsc);
 236 } /* wext_send_michaelmicfailure_event() */
 237
 238 void
 239 wext_send_pmkid_candidate_event(unifi_priv_t *priv, CsrWifiMacAddress bssid, u8 preauth_allowed, u16 interfaceTag)
 240 {
 241 #if WIRELESS_EXT > 17
 242     union iwreq_data wrqu;
 243     struct iw_pmkid_cand pmkid_cand;
 244
 245     if (interfaceTag >= CSR_WIFI_NUM_INTERFACES) {
 246         unifi_error(priv, "wext_send_pmkid_candidate_event bad interfaceTag\n");
 247         return;
 248     }
 249
 250     memset(&pmkid_cand, 0, sizeof(pmkid_cand));
 251
 252     if (preauth_allowed) {
 253         pmkid_cand.flags |= IW_PMKID_CAND_PREAUTH;
 254     }
 255     pmkid_cand.bssid.sa_family = ARPHRD_ETHER;
 256     memcpy(pmkid_cand.bssid.sa_data, bssid.a, ETH_ALEN);
 257     /* Used as priority, smaller the number higher the priority, not really used in our case */
 258     pmkid_cand.index = 1;
 259
 260     memset(&wrqu, 0, sizeof(wrqu));
 261     wrqu.data.length = sizeof(pmkid_cand);
 262
 263     wireless_send_event(priv->netdev[interfaceTag], IWEVPMKIDCAND, &wrqu, (char *)&pmkid_cand);
 264 #endif
 265 } /* wext_send_pmkid_candidate_event() */
 266
 267 /*
 268  * Send a custom WEXT event to say we have completed initialisation
 269  * and are now ready for WEXT ioctls. Used by Android wpa_supplicant.
 270  */
 271 void
 272 wext_send_started_event(unifi_priv_t *priv)
 273 {
 274 #if WIRELESS_EXT > 17
 275     union iwreq_data wrqu;
 276     char data[] = "STARTED";
 277
 278     wrqu.data.length = sizeof(data);
 279     wrqu.data.flags = 0;
 280     wireless_send_event(priv->netdev[CSR_WIFI_INTERFACE_IN_USE], IWEVCUSTOM, &wrqu, data);
 281 #endif
 282 } /* wext_send_started_event() */
 283