drivers/staging/wilc1000/linux_mon.c

   1 /*!
   2  *  @file       linux_mon.c
   3  *  @brief      File Operations OS wrapper functionality
   4  *  @author     mdaftedar
   5  *  @sa         wilc_wfi_netdevice.h
   6  *  @date       01 MAR 2012
   7  *  @version    1.0
   8  */
   9 #include "wilc_wfi_cfgoperations.h"
  10 #include "linux_wlan_common.h"
  11 #include "wilc_wlan_if.h"
  12 #include "wilc_wlan.h"
  13
  14 #ifdef WILC_AP_EXTERNAL_MLME
  15
  16 struct wilc_wfi_radiotap_hdr {
  17         struct ieee80211_radiotap_header hdr;
  18         u8 rate;
  19         /* u32 channel; */
  20 } __attribute__((packed));
  21
  22 struct wilc_wfi_radiotap_cb_hdr {
  23         struct ieee80211_radiotap_header hdr;
  24         u8 rate;
  25         u8 dump;
  26         u16 tx_flags;
  27         /* u32 channel; */
  28 } __attribute__((packed));
  29
  30 extern linux_wlan_t *g_linux_wlan;
  31
  32 static struct net_device *wilc_wfi_mon; /* global monitor netdev */
  33
  34 extern int  mac_xmit(struct sk_buff *skb, struct net_device *dev);
  35
  36
  37 u8 srcAdd[6];
  38 u8 bssid[6];
  39 u8 broadcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
  40 /**
  41  *  @brief      WILC_WFI_monitor_rx
  42  *  @details
  43  *  @param[in]
  44  *  @return     int : Return 0 on Success
  45  *  @author     mdaftedar
  46  *  @date       12 JUL 2012
  47  *  @version    1.0
  48  */
  49
  50 #define IEEE80211_RADIOTAP_F_TX_RTS     0x0004  /* used rts/cts handshake */
  51 #define IEEE80211_RADIOTAP_F_TX_FAIL    0x0001  /* failed due to excessive*/
  52 #define IS_MANAGMEMENT                          0x100
  53 #define IS_MANAGMEMENT_CALLBACK                 0x080
  54 #define IS_MGMT_STATUS_SUCCES                   0x040
  55 #define GET_PKT_OFFSET(a) (((a) >> 22) & 0x1ff)
  56
  57 void WILC_WFI_monitor_rx(u8 *buff, uint32_t size)
  58 {
  59         uint32_t header, pkt_offset;
  60         struct sk_buff *skb = NULL;
  61         struct wilc_wfi_radiotap_hdr *hdr;
  62         struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
  63
  64         PRINT_INFO(HOSTAPD_DBG, "In monitor interface receive function\n");
  65
  66         /*   struct wilc_priv *priv = netdev_priv(dev); */
  67
  68         /*   priv = wiphy_priv(priv->dev->ieee80211_ptr->wiphy); */
  69
  70         /* Bug 4601 */
  71         if (wilc_wfi_mon == NULL)
  72                 return;
  73
  74         if (!netif_running(wilc_wfi_mon)) {
  75                 PRINT_INFO(HOSTAPD_DBG, "Monitor interface already RUNNING\n");
  76                 return;
  77         }
  78
  79         /* Get WILC header */
  80         memcpy(&header, (buff - HOST_HDR_OFFSET), HOST_HDR_OFFSET);
  81
  82         /* The packet offset field conain info about what type of managment frame */
  83         /* we are dealing with and ack status */
  84         pkt_offset = GET_PKT_OFFSET(header);
  85
  86         if (pkt_offset & IS_MANAGMEMENT_CALLBACK) {
  87
  88                 /* hostapd callback mgmt frame */
  89
  90                 skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_cb_hdr));
  91                 if (skb == NULL) {
  92                         PRINT_INFO(HOSTAPD_DBG, "Monitor if : No memory to allocate skb");
  93                         return;
  94                 }
  95
  96                 memcpy(skb_put(skb, size), buff, size);
  97
  98                 cb_hdr = (struct wilc_wfi_radiotap_cb_hdr *) skb_push(skb, sizeof(*cb_hdr));
  99                 memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
 100
 101                 cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
 102
 103                 cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));
 104
 105                 cb_hdr->hdr.it_present = cpu_to_le32(
 106                                 (1 << IEEE80211_RADIOTAP_RATE) |
 107                                 (1 << IEEE80211_RADIOTAP_TX_FLAGS));
 108
 109                 cb_hdr->rate = 5; /* txrate->bitrate / 5; */
 110
 111                 if (pkt_offset & IS_MGMT_STATUS_SUCCES) {
 112                         /* success */
 113                         cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_RTS;
 114                 } else {
 115                         cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_FAIL;
 116                 }
 117
 118         } else {
 119
 120                 skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_hdr));
 121
 122                 if (skb == NULL) {
 123                         PRINT_INFO(HOSTAPD_DBG, "Monitor if : No memory to allocate skb");
 124                         return;
 125                 }
 126
 127                 /* skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC); */
 128                 /* if (skb == NULL) */
 129                 /*      return; */
 130
 131                 memcpy(skb_put(skb, size), buff, size);
 132                 hdr = (struct wilc_wfi_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 133                 memset(hdr, 0, sizeof(struct wilc_wfi_radiotap_hdr));
 134                 hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
 135                 /* hdr->hdr.it_pad = 0; */
 136                 hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_hdr));
 137                 PRINT_INFO(HOSTAPD_DBG, "Radiotap len %d\n", hdr->hdr.it_len);
 138                 hdr->hdr.it_present = cpu_to_le32
 139                                 (1 << IEEE80211_RADIOTAP_RATE);                   /* | */
 140                 /* (1 << IEEE80211_RADIOTAP_CHANNEL)); */
 141                 PRINT_INFO(HOSTAPD_DBG, "Presentflags %d\n", hdr->hdr.it_present);
 142                 hdr->rate = 5; /* txrate->bitrate / 5; */
 143
 144         }
 145
 146 /*      if(INFO || if(skb->data[9] == 0x00 || skb->data[9] == 0xb0))
 147  *      {
 148  *              for(i=0;i<skb->len;i++)
 149  *                      PRINT_INFO(HOSTAPD_DBG,"Mon RxData[%d] = %02x\n",i,skb->data[i]);
 150  *      }*/
 151
 152
 153         skb->dev = wilc_wfi_mon;
 154         skb_set_mac_header(skb, 0);
 155         skb->ip_summed = CHECKSUM_UNNECESSARY;
 156         skb->pkt_type = PACKET_OTHERHOST;
 157         skb->protocol = htons(ETH_P_802_2);
 158         memset(skb->cb, 0, sizeof(skb->cb));
 159
 160         netif_rx(skb);
 161
 162
 163 }
 164
 165 struct tx_complete_mon_data {
 166         int size;
 167         void *buff;
 168 };
 169
 170 static void mgmt_tx_complete(void *priv, int status)
 171 {
 172
 173         /* struct sk_buff *skb2; */
 174         /* struct wilc_wfi_radiotap_cb_hdr *cb_hdr; */
 175
 176         struct tx_complete_mon_data *pv_data = (struct tx_complete_mon_data *)priv;
 177         u8 *buf =  pv_data->buff;
 178
 179
 180
 181         if (status == 1) {
 182                 if (INFO || buf[0] == 0x10 || buf[0] == 0xb0)
 183                         PRINT_INFO(HOSTAPD_DBG, "Packet sent successfully - Size = %d - Address = %p.\n", pv_data->size, pv_data->buff);
 184         } else {
 185                 PRINT_INFO(HOSTAPD_DBG, "Couldn't send packet - Size = %d - Address = %p.\n", pv_data->size, pv_data->buff);
 186         }
 187
 188
 189 /*                      //(skb->data[9] == 0x00 || skb->data[9] == 0xb0 || skb->data[9] == 0x40 ||  skb->data[9] == 0xd0 )
 190  *      {
 191  *              skb2 = dev_alloc_skb(pv_data->size+sizeof(struct wilc_wfi_radiotap_cb_hdr));
 192  *
 193  *              memcpy(skb_put(skb2,pv_data->size),pv_data->buff, pv_data->size);
 194  *
 195  *              cb_hdr = (struct wilc_wfi_radiotap_cb_hdr *) skb_push(skb2, sizeof(*cb_hdr));
 196  *              memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
 197  *
 198  *               cb_hdr->hdr.it_version = 0;//PKTHDR_RADIOTAP_VERSION;
 199  *
 200  *              cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));
 201  *
 202  *       cb_hdr->hdr.it_present = cpu_to_le32(
 203  *                                        (1 << IEEE80211_RADIOTAP_RATE) |
 204  *                                       (1 << IEEE80211_RADIOTAP_TX_FLAGS));
 205  *
 206  *              cb_hdr->rate = 5;//txrate->bitrate / 5;
 207  *              cb_hdr->tx_flags = 0x0004;
 208  *
 209  *              skb2->dev = wilc_wfi_mon;
 210  *              skb_set_mac_header(skb2, 0);
 211  *              skb2->ip_summed = CHECKSUM_UNNECESSARY;
 212  *              skb2->pkt_type = PACKET_OTHERHOST;
 213  *              skb2->protocol = htons(ETH_P_802_2);
 214  *              memset(skb2->cb, 0, sizeof(skb2->cb));
 215  *
 216  *              netif_rx(skb2);
 217  *      }*/
 218
 219         /* incase of fully hosting mode, the freeing will be done in response to the cfg packet */
 220         kfree(pv_data->buff);
 221
 222         kfree(pv_data);
 223 }
 224 static int mon_mgmt_tx(struct net_device *dev, const u8 *buf, size_t len)
 225 {
 226         struct tx_complete_mon_data *mgmt_tx = NULL;
 227
 228         if (dev == NULL) {
 229                 PRINT_D(HOSTAPD_DBG, "ERROR: dev == NULL\n");
 230                 return WILC_FAIL;
 231         }
 232
 233         netif_stop_queue(dev);
 234         mgmt_tx = kmalloc(sizeof(struct tx_complete_mon_data), GFP_ATOMIC);
 235         if (mgmt_tx == NULL) {
 236                 PRINT_ER("Failed to allocate memory for mgmt_tx structure\n");
 237                 return WILC_FAIL;
 238         }
 239
 240         mgmt_tx->buff = kmalloc(len, GFP_ATOMIC);
 241         if (mgmt_tx->buff == NULL) {
 242                 PRINT_ER("Failed to allocate memory for mgmt_tx buff\n");
 243                 kfree(mgmt_tx);
 244                 return WILC_FAIL;
 245
 246         }
 247
 248         mgmt_tx->size = len;
 249
 250         memcpy(mgmt_tx->buff, buf, len);
 251         g_linux_wlan->oup.wlan_add_mgmt_to_tx_que(mgmt_tx, mgmt_tx->buff, mgmt_tx->size, mgmt_tx_complete);
 252
 253         netif_wake_queue(dev);
 254         return 0;
 255 }
 256
 257 /**
 258  *  @brief      WILC_WFI_mon_xmit
 259  *  @details
 260  *  @param[in]
 261  *  @return     int : Return 0 on Success
 262  *  @author     mdaftedar
 263  *  @date       12 JUL 2012
 264  *  @version    1.0
 265  */
 266 static netdev_tx_t WILC_WFI_mon_xmit(struct sk_buff *skb,
 267                                      struct net_device *dev)
 268 {
 269         u32 rtap_len, i, ret = 0;
 270         struct WILC_WFI_mon_priv  *mon_priv;
 271
 272         struct sk_buff *skb2;
 273         struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
 274
 275         /* Bug 4601 */
 276         if (wilc_wfi_mon == NULL)
 277                 return WILC_FAIL;
 278
 279         /* if(skb->data[3] == 0x10 || skb->data[3] == 0xb0) */
 280
 281         mon_priv = netdev_priv(wilc_wfi_mon);
 282
 283         if (mon_priv == NULL) {
 284                 PRINT_ER("Monitor interface private structure is NULL\n");
 285                 return WILC_FAIL;
 286         }
 287
 288
 289         rtap_len = ieee80211_get_radiotap_len(skb->data);
 290         if (skb->len < rtap_len) {
 291                 PRINT_ER("Error in radiotap header\n");
 292                 return -1;
 293         }
 294         /* skip the radiotap header */
 295         PRINT_INFO(HOSTAPD_DBG, "Radiotap len: %d\n", rtap_len);
 296
 297         if (INFO) {
 298                 for (i = 0; i < rtap_len; i++)
 299                         PRINT_INFO(HOSTAPD_DBG, "Radiotap_hdr[%d] %02x\n", i, skb->data[i]);
 300         }
 301         /* Skip the ratio tap header */
 302         skb_pull(skb, rtap_len);
 303
 304         if (skb->data[0] == 0xc0)
 305                 PRINT_INFO(HOSTAPD_DBG, "%x:%x:%x:%x:%x%x\n", skb->data[4], skb->data[5], skb->data[6], skb->data[7], skb->data[8], skb->data[9]);
 306
 307         if (skb->data[0] == 0xc0 && (!(memcmp(broadcast, &skb->data[4], 6)))) {
 308                 skb2 = dev_alloc_skb(skb->len + sizeof(struct wilc_wfi_radiotap_cb_hdr));
 309
 310                 memcpy(skb_put(skb2, skb->len), skb->data, skb->len);
 311
 312                 cb_hdr = (struct wilc_wfi_radiotap_cb_hdr *) skb_push(skb2, sizeof(*cb_hdr));
 313                 memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
 314
 315                 cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
 316
 317                 cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));
 318
 319                 cb_hdr->hdr.it_present = cpu_to_le32(
 320                                 (1 << IEEE80211_RADIOTAP_RATE) |
 321                                 (1 << IEEE80211_RADIOTAP_TX_FLAGS));
 322
 323                 cb_hdr->rate = 5; /* txrate->bitrate / 5; */
 324                 cb_hdr->tx_flags = 0x0004;
 325
 326                 skb2->dev = wilc_wfi_mon;
 327                 skb_set_mac_header(skb2, 0);
 328                 skb2->ip_summed = CHECKSUM_UNNECESSARY;
 329                 skb2->pkt_type = PACKET_OTHERHOST;
 330                 skb2->protocol = htons(ETH_P_802_2);
 331                 memset(skb2->cb, 0, sizeof(skb2->cb));
 332
 333                 netif_rx(skb2);
 334
 335                 return 0;
 336         }
 337         skb->dev = mon_priv->real_ndev;
 338
 339         PRINT_INFO(HOSTAPD_DBG, "Skipping the radiotap header\n");
 340
 341
 342
 343         /* actual deliver of data is device-specific, and not shown here */
 344         PRINT_INFO(HOSTAPD_DBG, "SKB netdevice name = %s\n", skb->dev->name);
 345         PRINT_INFO(HOSTAPD_DBG, "MONITOR real dev name = %s\n", mon_priv->real_ndev->name);
 346
 347         /* Identify if Ethernet or MAC header (data or mgmt) */
 348         memcpy(srcAdd, &skb->data[10], 6);
 349         memcpy(bssid, &skb->data[16], 6);
 350         /* if source address and bssid fields are equal>>Mac header */
 351         /*send it to mgmt frames handler */
 352         if (!(memcmp(srcAdd, bssid, 6))) {
 353                 mon_mgmt_tx(mon_priv->real_ndev, skb->data, skb->len);
 354                 dev_kfree_skb(skb);
 355         } else
 356                 ret = mac_xmit(skb, mon_priv->real_ndev);
 357
 358         /* return NETDEV_TX_OK; */
 359         return ret;
 360 }
 361
 362 static const struct net_device_ops wilc_wfi_netdev_ops = {
 363         .ndo_start_xmit         = WILC_WFI_mon_xmit,
 364
 365 };
 366
 367 /**
 368  *  @brief      WILC_WFI_mon_setup
 369  *  @details
 370  *  @param[in]
 371  *  @return     int : Return 0 on Success
 372  *  @author     mdaftedar
 373  *  @date       12 JUL 2012
 374  *  @version    1.0
 375  */
 376 static void WILC_WFI_mon_setup(struct net_device *dev)
 377 {
 378
 379         dev->netdev_ops = &wilc_wfi_netdev_ops;
 380         /* dev->destructor = free_netdev; */
 381         PRINT_INFO(CORECONFIG_DBG, "In Ethernet setup function\n");
 382         ether_setup(dev);
 383         dev->priv_flags |= IFF_NO_QUEUE;
 384         dev->type = ARPHRD_IEEE80211_RADIOTAP;
 385         eth_zero_addr(dev->dev_addr);
 386
 387         {
 388                 /* u8 * mac_add; */
 389                 unsigned char mac_add[] = {0x00, 0x50, 0xc2, 0x5e, 0x10, 0x8f};
 390                 /* priv = wiphy_priv(priv->dev->ieee80211_ptr->wiphy); */
 391                 /* mac_add = (u8*)WILC_MALLOC(ETH_ALEN); */
 392                 /* status = host_int_get_MacAddress(priv->hWILCWFIDrv,mac_add); */
 393                 /* mac_add[ETH_ALEN-1]+=1; */
 394                 memcpy(dev->dev_addr, mac_add, ETH_ALEN);
 395         }
 396
 397 }
 398
 399 /**
 400  *  @brief      WILC_WFI_init_mon_interface
 401  *  @details
 402  *  @param[in]
 403  *  @return     int : Return 0 on Success
 404  *  @author     mdaftedar
 405  *  @date       12 JUL 2012
 406  *  @version    1.0
 407  */
 408 struct net_device *WILC_WFI_init_mon_interface(const char *name, struct net_device *real_dev)
 409 {
 410
 411
 412         u32 ret = WILC_SUCCESS;
 413         struct WILC_WFI_mon_priv *priv;
 414
 415         /*If monitor interface is already initialized, return it*/
 416         if (wilc_wfi_mon) {
 417                 return wilc_wfi_mon;
 418         }
 419
 420         wilc_wfi_mon = alloc_etherdev(sizeof(struct WILC_WFI_mon_priv));
 421         if (!wilc_wfi_mon) {
 422                 PRINT_ER("failed to allocate memory\n");
 423                 return NULL;
 424
 425         }
 426
 427         wilc_wfi_mon->type = ARPHRD_IEEE80211_RADIOTAP;
 428         strncpy(wilc_wfi_mon->name, name, IFNAMSIZ);
 429         wilc_wfi_mon->name[IFNAMSIZ - 1] = 0;
 430         wilc_wfi_mon->netdev_ops = &wilc_wfi_netdev_ops;
 431
 432         ret = register_netdevice(wilc_wfi_mon);
 433         if (ret) {
 434                 PRINT_ER(" register_netdevice failed (%d)\n", ret);
 435                 return NULL;
 436         }
 437         priv = netdev_priv(wilc_wfi_mon);
 438         if (priv == NULL) {
 439                 PRINT_ER("private structure is NULL\n");
 440                 return NULL;
 441         }
 442
 443         priv->real_ndev = real_dev;
 444
 445         return wilc_wfi_mon;
 446 }
 447
 448 /**
 449  *  @brief      WILC_WFI_deinit_mon_interface
 450  *  @details
 451  *  @param[in]
 452  *  @return     int : Return 0 on Success
 453  *  @author     mdaftedar
 454  *  @date       12 JUL 2012
 455  *  @version    1.0
 456  */
 457 int WILC_WFI_deinit_mon_interface(void)
 458 {
 459         bool rollback_lock = false;
 460
 461         if (wilc_wfi_mon != NULL) {
 462                 PRINT_D(HOSTAPD_DBG, "In Deinit monitor interface\n");
 463                 PRINT_D(HOSTAPD_DBG, "RTNL is being locked\n");
 464                 if (rtnl_is_locked()) {
 465                         rtnl_unlock();
 466                         rollback_lock = true;
 467                 }
 468                 PRINT_D(HOSTAPD_DBG, "Unregister netdev\n");
 469                 unregister_netdev(wilc_wfi_mon);
 470                 /* free_netdev(wilc_wfi_mon); */
 471
 472                 if (rollback_lock) {
 473                         rtnl_lock();
 474                         rollback_lock = false;
 475                 }
 476                 wilc_wfi_mon = NULL;
 477         }
 478         return WILC_SUCCESS;
 479
 480 }
 481 #endif /* WILC_AP_EXTERNAL_MLME */