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_newalloc = NULL;
  28         precvframe->pkt = NULL;
  29 }
  30
  31 /* alloc os related resource in struct recv_buf */
  32 int rtw_os_recvbuf_resource_alloc(struct adapter *padapter,
  33                                   struct recv_buf *precvbuf)
  34 {
  35         precvbuf->pskb = NULL;
  36         precvbuf->reuse = false;
  37         precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
  38         if (!precvbuf->purb)
  39                 return _FAIL;
  40         return _SUCCESS;
  41 }
  42
  43 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
  44 {
  45         union iwreq_data wrqu;
  46         struct iw_michaelmicfailure    ev;
  47         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  48         struct security_priv    *psecuritypriv = &padapter->securitypriv;
  49         u32 cur_time = 0;
  50
  51         if (psecuritypriv->last_mic_err_time == 0) {
  52                 psecuritypriv->last_mic_err_time = jiffies;
  53         } else {
  54                 cur_time = jiffies;
  55
  56                 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
  57                         psecuritypriv->btkip_countermeasure = true;
  58                         psecuritypriv->last_mic_err_time = 0;
  59                         psecuritypriv->btkip_countermeasure_time = cur_time;
  60                 } else {
  61                         psecuritypriv->last_mic_err_time = jiffies;
  62                 }
  63         }
  64
  65         memset(&ev, 0x00, sizeof(ev));
  66         if (bgroup)
  67                 ev.flags |= IW_MICFAILURE_GROUP;
  68         else
  69                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  70
  71         ev.src_addr.sa_family = ARPHRD_ETHER;
  72         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
  73         memset(&wrqu, 0x00, sizeof(wrqu));
  74         wrqu.data.length = sizeof(ev);
  75         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE,
  76                             &wrqu, (char *)&ev);
  77 }
  78
  79 int rtw_recv_indicatepkt(struct adapter *padapter,
  80                          struct recv_frame *precv_frame)
  81 {
  82         struct recv_priv *precvpriv;
  83         struct __queue *pfree_recv_queue;
  84         struct sk_buff *skb;
  85         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
  86
  87
  88         precvpriv = &(padapter->recvpriv);
  89         pfree_recv_queue = &(precvpriv->free_recv_queue);
  90
  91         skb = precv_frame->pkt;
  92         if (!skb) {
  93                 RT_TRACE(_module_recv_osdep_c_, _drv_err_,
  94                          ("rtw_recv_indicatepkt():skb == NULL something wrong!!!!\n"));
  95                 goto _recv_indicatepkt_drop;
  96         }
  97
  98         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
  99                  ("rtw_recv_indicatepkt():skb != NULL !!!\n"));
 100         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 101                  ("rtw_recv_indicatepkt():precv_frame->rx_head =%p  precv_frame->hdr.rx_data =%p\n",
 102                  precv_frame->rx_head, precv_frame->rx_data));
 103         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 104                  ("precv_frame->hdr.rx_tail =%p precv_frame->rx_end =%p precv_frame->hdr.len =%d\n",
 105                  precv_frame->rx_tail, precv_frame->rx_end,
 106                  precv_frame->len));
 107
 108         skb->data = precv_frame->rx_data;
 109
 110         skb_set_tail_pointer(skb, precv_frame->len);
 111
 112         skb->len = precv_frame->len;
 113
 114         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 115                  ("skb->head =%p skb->data =%p skb->tail =%p skb->end =%p skb->len =%d\n",
 116                  skb->head, skb->data, skb_tail_pointer(skb),
 117                  skb_end_pointer(skb), skb->len));
 118
 119         if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 120                 struct sk_buff *pskb2 = NULL;
 121                 struct sta_info *psta = NULL;
 122                 struct sta_priv *pstapriv = &padapter->stapriv;
 123                 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 124                 int bmcast = IS_MCAST(pattrib->dst);
 125
 126                 if (memcmp(pattrib->dst, myid(&padapter->eeprompriv),
 127                            ETH_ALEN)) {
 128                         if (bmcast) {
 129                                 psta = rtw_get_bcmc_stainfo(padapter);
 130                                 pskb2 = skb_clone(skb, GFP_ATOMIC);
 131                         } else {
 132                                 psta = rtw_get_stainfo(pstapriv, pattrib->dst);
 133                         }
 134
 135                         if (psta) {
 136                                 struct net_device *pnetdev;
 137
 138                                 pnetdev = (struct net_device *)padapter->pnetdev;
 139                                 skb->dev = pnetdev;
 140                                 skb_set_queue_mapping(skb, rtw_recv_select_queue(skb));
 141
 142                                 rtw_xmit_entry(skb, pnetdev);
 143
 144                                 if (bmcast)
 145                                         skb = pskb2;
 146                                 else
 147                                         goto _recv_indicatepkt_end;
 148                         }
 149                 }
 150         }
 151
 152         rcu_read_lock();
 153         rcu_dereference(padapter->pnetdev->rx_handler_data);
 154         rcu_read_unlock();
 155
 156         skb->ip_summed = CHECKSUM_NONE;
 157         skb->dev = padapter->pnetdev;
 158         skb->protocol = eth_type_trans(skb, padapter->pnetdev);
 159
 160         netif_rx(skb);
 161
 162 _recv_indicatepkt_end:
 163
 164         /*  pointers to NULL before rtw_free_recvframe() */
 165         precv_frame->pkt = NULL;
 166
 167         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 168
 169         RT_TRACE(_module_recv_osdep_c_, _drv_info_,
 170                  ("\n rtw_recv_indicatepkt :after netif_rx!!!!\n"));
 171
 172
 173         return _SUCCESS;
 174
 175 _recv_indicatepkt_drop:
 176
 177          /* enqueue back to free_recv_queue */
 178         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 179
 180          return _FAIL;
 181 }
 182
 183 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 184 {
 185
 186         setup_timer(&preorder_ctrl->reordering_ctrl_timer,
 187                     rtw_reordering_ctrl_timeout_handler,
 188                     (unsigned long)preorder_ctrl);
 189 }