kernel/drivers/staging/rtl8188eu/os_dep/recv_linux.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  *
  19  ******************************************************************************/
  20 #define _RECV_OSDEP_C_
  21
  22 #include <osdep_service.h>
  23 #include <drv_types.h>
  24
  25 #include <wifi.h>
  26 #include <recv_osdep.h>
  27
  28 #include <osdep_intf.h>
  29 #include <usb_ops_linux.h>
  30
  31 /* alloc os related resource in struct recv_frame */
  32 int rtw_os_recv_resource_alloc(struct adapter *padapter,
  33                                struct recv_frame *precvframe)
  34 {
  35         precvframe->pkt_newalloc = NULL;
  36         precvframe->pkt = NULL;
  37         return _SUCCESS;
  38 }
  39
  40 /* alloc os related resource in struct recv_buf */
  41 int rtw_os_recvbuf_resource_alloc(struct adapter *padapter,
  42                                   struct recv_buf *precvbuf)
  43 {
  44         int res = _SUCCESS;
  45
  46         precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
  47         if (precvbuf->purb == NULL)
  48                 res = _FAIL;
  49         precvbuf->pskb = NULL;
  50         precvbuf->reuse = false;
  51         return res;
  52 }
  53
  54 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
  55 {
  56         union iwreq_data wrqu;
  57         struct iw_michaelmicfailure    ev;
  58         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  59         struct security_priv    *psecuritypriv = &padapter->securitypriv;
  60         u32 cur_time = 0;
  61
  62         if (psecuritypriv->last_mic_err_time == 0) {
  63                 psecuritypriv->last_mic_err_time = jiffies;
  64         } else {
  65                 cur_time = jiffies;
  66
  67                 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
  68                         psecuritypriv->btkip_countermeasure = true;
  69                         psecuritypriv->last_mic_err_time = 0;
  70                         psecuritypriv->btkip_countermeasure_time = cur_time;
  71                 } else {
  72                         psecuritypriv->last_mic_err_time = jiffies;
  73                 }
  74         }
  75
  76         memset(&ev, 0x00, sizeof(ev));
  77         if (bgroup)
  78                 ev.flags |= IW_MICFAILURE_GROUP;
  79         else
  80                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  81
  82         ev.src_addr.sa_family = ARPHRD_ETHER;
  83         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
  84         memset(&wrqu, 0x00, sizeof(wrqu));
  85         wrqu.data.length = sizeof(ev);
  86         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE,
  87                             &wrqu, (char *)&ev);
  88 }
  89
  90 int rtw_recv_indicatepkt(struct adapter *padapter,
  91                          struct recv_frame *precv_frame)
  92 {
  93         struct recv_priv *precvpriv;
  94         struct __queue *pfree_recv_queue;
  95         struct sk_buff *skb;
  96         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
  97
  98
  99         precvpriv = &(padapter->recvpriv);
 100         pfree_recv_queue = &(precvpriv->free_recv_queue);
 101
 102         skb = precv_frame->pkt;
 103         if (skb == NULL) {
 104                 RT_TRACE(_module_recv_osdep_c_, _drv_err_,
 105                          ("rtw_recv_indicatepkt():skb == NULL something wrong!!!!\n"));
 106                 goto _recv_indicatepkt_drop;
 107         }
 108
 109         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 110                  ("rtw_recv_indicatepkt():skb != NULL !!!\n"));
 111         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 112                  ("rtw_recv_indicatepkt():precv_frame->rx_head =%p  precv_frame->hdr.rx_data =%p\n",
 113                  precv_frame->rx_head, precv_frame->rx_data));
 114         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 115                  ("precv_frame->hdr.rx_tail =%p precv_frame->rx_end =%p precv_frame->hdr.len =%d\n",
 116                  precv_frame->rx_tail, precv_frame->rx_end,
 117                  precv_frame->len));
 118
 119         skb->data = precv_frame->rx_data;
 120
 121         skb_set_tail_pointer(skb, precv_frame->len);
 122
 123         skb->len = precv_frame->len;
 124
 125         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 126                  ("skb->head =%p skb->data =%p skb->tail =%p skb->end =%p skb->len =%d\n",
 127                  skb->head, skb->data, skb_tail_pointer(skb),
 128                  skb_end_pointer(skb), skb->len));
 129
 130         if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 131                 struct sk_buff *pskb2 = NULL;
 132                 struct sta_info *psta = NULL;
 133                 struct sta_priv *pstapriv = &padapter->stapriv;
 134                 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 135                 int bmcast = IS_MCAST(pattrib->dst);
 136
 137                 if (memcmp(pattrib->dst, myid(&padapter->eeprompriv),
 138                            ETH_ALEN)) {
 139                         if (bmcast) {
 140                                 psta = rtw_get_bcmc_stainfo(padapter);
 141                                 pskb2 = skb_clone(skb, GFP_ATOMIC);
 142                         } else {
 143                                 psta = rtw_get_stainfo(pstapriv, pattrib->dst);
 144                         }
 145
 146                         if (psta) {
 147                                 struct net_device *pnetdev;
 148
 149                                 pnetdev = (struct net_device *)padapter->pnetdev;
 150                                 skb->dev = pnetdev;
 151                                 skb_set_queue_mapping(skb, rtw_recv_select_queue(skb));
 152
 153                                 rtw_xmit_entry(skb, pnetdev);
 154
 155                                 if (bmcast)
 156                                         skb = pskb2;
 157                                 else
 158                                         goto _recv_indicatepkt_end;
 159                         }
 160                 }
 161         }
 162
 163         rcu_read_lock();
 164         rcu_dereference(padapter->pnetdev->rx_handler_data);
 165         rcu_read_unlock();
 166
 167         skb->ip_summed = CHECKSUM_NONE;
 168         skb->dev = padapter->pnetdev;
 169         skb->protocol = eth_type_trans(skb, padapter->pnetdev);
 170
 171         netif_rx(skb);
 172
 173 _recv_indicatepkt_end:
 174
 175         /*  pointers to NULL before rtw_free_recvframe() */
 176         precv_frame->pkt = NULL;
 177
 178         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 179
 180         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 181                  ("\n rtw_recv_indicatepkt :after netif_rx!!!!\n"));
 182
 183
 184         return _SUCCESS;
 185
 186 _recv_indicatepkt_drop:
 187
 188          /* enqueue back to free_recv_queue */
 189         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 190
 191          return _FAIL;
 192 }
 193
 194 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 195 {
 196
 197         setup_timer(&preorder_ctrl->reordering_ctrl_timer,
 198                     rtw_reordering_ctrl_timeout_handler,
 199                     (unsigned long)preorder_ctrl);
 200 }