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  ******************************************************************************/
  15 #include <osdep_service.h>
  16 #include <drv_types.h>
  17
  18 #include <wifi.h>
  19 #include <recv_osdep.h>
  20
  21 #include <osdep_intf.h>
  22 #include <usb_ops_linux.h>
  23
  24 /* alloc os related resource in struct recv_frame */
  25 void rtw_os_recv_resource_alloc(struct recv_frame *precvframe)
  26 {
  27         precvframe->pkt = NULL;
  28 }
  29
  30 /* alloc os related resource in struct recv_buf */
  31 int rtw_os_recvbuf_resource_alloc(struct adapter *padapter,
  32                                   struct recv_buf *precvbuf)
  33 {
  34         precvbuf->pskb = NULL;
  35         precvbuf->reuse = false;
  36         precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
  37         if (!precvbuf->purb)
  38                 return _FAIL;
  39         return _SUCCESS;
  40 }
  41
  42 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
  43 {
  44         union iwreq_data wrqu;
  45         struct iw_michaelmicfailure    ev;
  46         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  47         struct security_priv    *psecuritypriv = &padapter->securitypriv;
  48         u32 cur_time = 0;
  49
  50         if (psecuritypriv->last_mic_err_time == 0) {
  51                 psecuritypriv->last_mic_err_time = jiffies;
  52         } else {
  53                 cur_time = jiffies;
  54
  55                 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
  56                         psecuritypriv->btkip_countermeasure = true;
  57                         psecuritypriv->last_mic_err_time = 0;
  58                         psecuritypriv->btkip_countermeasure_time = cur_time;
  59                 } else {
  60                         psecuritypriv->last_mic_err_time = jiffies;
  61                 }
  62         }
  63
  64         memset(&ev, 0x00, sizeof(ev));
  65         if (bgroup)
  66                 ev.flags |= IW_MICFAILURE_GROUP;
  67         else
  68                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  69
  70         ev.src_addr.sa_family = ARPHRD_ETHER;
  71         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
  72         memset(&wrqu, 0x00, sizeof(wrqu));
  73         wrqu.data.length = sizeof(ev);
  74         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE,
  75                             &wrqu, (char *)&ev);
  76 }
  77
  78 int rtw_recv_indicatepkt(struct adapter *padapter,
  79                          struct recv_frame *precv_frame)
  80 {
  81         struct recv_priv *precvpriv;
  82         struct __queue *pfree_recv_queue;
  83         struct sk_buff *skb;
  84         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
  85
  86
  87         precvpriv = &(padapter->recvpriv);
  88         pfree_recv_queue = &(precvpriv->free_recv_queue);
  89
  90         skb = precv_frame->pkt;
  91         if (!skb) {
  92                 RT_TRACE(_module_recv_osdep_c_, _drv_err_,
  93                          ("rtw_recv_indicatepkt():skb == NULL something wrong!!!!\n"));
  94                 goto _recv_indicatepkt_drop;
  95         }
  96
  97         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
  98                  ("rtw_recv_indicatepkt():skb != NULL !!!\n"));
  99         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 100                  ("rtw_recv_indicatepkt():precv_frame->rx_head =%p  precv_frame->hdr.rx_data =%p\n",
 101                  precv_frame->rx_head, precv_frame->rx_data));
 102         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 103                  ("precv_frame->hdr.rx_tail =%p precv_frame->rx_end =%p precv_frame->hdr.len =%d\n",
 104                  precv_frame->rx_tail, precv_frame->rx_end,
 105                  precv_frame->len));
 106
 107         skb->data = precv_frame->rx_data;
 108
 109         skb_set_tail_pointer(skb, precv_frame->len);
 110
 111         skb->len = precv_frame->len;
 112
 113         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 114                  ("skb->head =%p skb->data =%p skb->tail =%p skb->end =%p skb->len =%d\n",
 115                  skb->head, skb->data, skb_tail_pointer(skb),
 116                  skb_end_pointer(skb), skb->len));
 117
 118         if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 119                 struct sk_buff *pskb2 = NULL;
 120                 struct sta_info *psta = NULL;
 121                 struct sta_priv *pstapriv = &padapter->stapriv;
 122                 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 123                 int bmcast = IS_MCAST(pattrib->dst);
 124
 125                 if (memcmp(pattrib->dst, myid(&padapter->eeprompriv),
 126                            ETH_ALEN)) {
 127                         if (bmcast) {
 128                                 psta = rtw_get_bcmc_stainfo(padapter);
 129                                 pskb2 = skb_clone(skb, GFP_ATOMIC);
 130                         } else {
 131                                 psta = rtw_get_stainfo(pstapriv, pattrib->dst);
 132                         }
 133
 134                         if (psta) {
 135                                 struct net_device *pnetdev;
 136
 137                                 pnetdev = (struct net_device *)padapter->pnetdev;
 138                                 skb->dev = pnetdev;
 139                                 skb_set_queue_mapping(skb, rtw_recv_select_queue(skb));
 140
 141                                 rtw_xmit_entry(skb, pnetdev);
 142
 143                                 if (bmcast)
 144                                         skb = pskb2;
 145                                 else
 146                                         goto _recv_indicatepkt_end;
 147                         }
 148                 }
 149         }
 150
 151         rcu_read_lock();
 152         rcu_dereference(padapter->pnetdev->rx_handler_data);
 153         rcu_read_unlock();
 154
 155         skb->ip_summed = CHECKSUM_NONE;
 156         skb->dev = padapter->pnetdev;
 157         skb->protocol = eth_type_trans(skb, padapter->pnetdev);
 158
 159         netif_rx(skb);
 160
 161 _recv_indicatepkt_end:
 162
 163         /*  pointers to NULL before rtw_free_recvframe() */
 164         precv_frame->pkt = NULL;
 165
 166         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 167
 168         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 169                  ("\n rtw_recv_indicatepkt :after netif_rx!!!!\n"));
 170
 171
 172         return _SUCCESS;
 173
 174 _recv_indicatepkt_drop:
 175
 176          /* enqueue back to free_recv_queue */
 177         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 178
 179          return _FAIL;
 180 }
 181
 182 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 183 {
 184
 185         setup_timer(&preorder_ctrl->reordering_ctrl_timer,
 186                     rtw_reordering_ctrl_timeout_handler,
 187                     (unsigned long)preorder_ctrl);
 188 }