drivers/staging/r8188eu/os_dep/recv_linux.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2007 - 2011 Realtek Corporation. */
   3
   4 #define _RECV_OSDEP_C_
   5
   6 #include "../include/osdep_service.h"
   7 #include "../include/drv_types.h"
   8
   9 #include "../include/wifi.h"
  10 #include "../include/recv_osdep.h"
  11
  12 #include "../include/osdep_intf.h"
  13 #include "../include/usb_ops.h"
  14
  15 /* alloc os related resource in struct recv_buf */
  16 int rtw_os_recvbuf_resource_alloc(struct adapter *padapter,
  17                 struct recv_buf *precvbuf)
  18 {
  19         int res = _SUCCESS;
  20
  21         precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
  22         if (!precvbuf->purb)
  23                 res = _FAIL;
  24         precvbuf->pskb = NULL;
  25         precvbuf->reuse = false;
  26         return res;
  27 }
  28
  29 /* free os related resource in struct recv_buf */
  30 int rtw_os_recvbuf_resource_free(struct adapter *padapter,
  31                                  struct recv_buf *precvbuf)
  32 {
  33         usb_free_urb(precvbuf->purb);
  34         return _SUCCESS;
  35 }
  36
  37 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
  38 {
  39         union iwreq_data wrqu;
  40         struct iw_michaelmicfailure    ev;
  41         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  42         struct security_priv    *psecuritypriv = &padapter->securitypriv;
  43         u32 cur_time = 0;
  44
  45         if (psecuritypriv->last_mic_err_time == 0) {
  46                 psecuritypriv->last_mic_err_time = jiffies;
  47         } else {
  48                 cur_time = jiffies;
  49
  50                 if (cur_time - psecuritypriv->last_mic_err_time < 60 * HZ) {
  51                         psecuritypriv->btkip_countermeasure = true;
  52                         psecuritypriv->last_mic_err_time = 0;
  53                         psecuritypriv->btkip_countermeasure_time = cur_time;
  54                 } else {
  55                         psecuritypriv->last_mic_err_time = jiffies;
  56                 }
  57         }
  58
  59         memset(&ev, 0x00, sizeof(ev));
  60         if (bgroup)
  61                 ev.flags |= IW_MICFAILURE_GROUP;
  62         else
  63                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  64
  65         ev.src_addr.sa_family = ARPHRD_ETHER;
  66         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
  67         memset(&wrqu, 0x00, sizeof(wrqu));
  68         wrqu.data.length = sizeof(ev);
  69         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE,
  70                             &wrqu, (char *)&ev);
  71 }
  72
  73 int rtw_recv_indicatepkt(struct adapter *padapter,
  74                          struct recv_frame *precv_frame)
  75 {
  76         struct recv_priv *precvpriv;
  77         struct __queue *pfree_recv_queue;
  78         struct sk_buff *skb;
  79         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
  80
  81         precvpriv = &padapter->recvpriv;
  82         pfree_recv_queue = &precvpriv->free_recv_queue;
  83
  84         skb = precv_frame->pkt;
  85         if (!skb)
  86                 goto _recv_indicatepkt_drop;
  87
  88         skb->data = precv_frame->rx_data;
  89
  90         skb_set_tail_pointer(skb, precv_frame->len);
  91
  92         skb->len = precv_frame->len;
  93
  94         if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
  95                 struct sk_buff *pskb2 = NULL;
  96                 struct sta_info *psta = NULL;
  97                 struct sta_priv *pstapriv = &padapter->stapriv;
  98                 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
  99                 bool bmcast = is_multicast_ether_addr(pattrib->dst);
 100
 101                 if (memcmp(pattrib->dst, myid(&padapter->eeprompriv),
 102                                  ETH_ALEN)) {
 103                         if (bmcast) {
 104                                 psta = rtw_get_bcmc_stainfo(padapter);
 105                                 pskb2 = skb_clone(skb, GFP_ATOMIC);
 106                         } else {
 107                                 psta = rtw_get_stainfo(pstapriv, pattrib->dst);
 108                         }
 109
 110                         if (psta) {
 111                                 struct net_device *pnetdev;
 112
 113                                 pnetdev = (struct net_device *)padapter->pnetdev;
 114                                 skb->dev = pnetdev;
 115                                 skb_set_queue_mapping(skb, rtw_recv_select_queue(skb));
 116
 117                                 rtw_xmit_entry(skb, pnetdev);
 118
 119                                 if (bmcast)
 120                                         skb = pskb2;
 121                                 else
 122                                         goto _recv_indicatepkt_end;
 123                         }
 124                 }
 125         }
 126
 127         rcu_read_lock();
 128         rcu_dereference(padapter->pnetdev->rx_handler_data);
 129         rcu_read_unlock();
 130
 131         skb->ip_summed = CHECKSUM_NONE;
 132         skb->dev = padapter->pnetdev;
 133         skb->protocol = eth_type_trans(skb, padapter->pnetdev);
 134
 135         netif_rx(skb);
 136
 137 _recv_indicatepkt_end:
 138
 139         /*  pointers to NULL before rtw_free_recvframe() */
 140         precv_frame->pkt = NULL;
 141
 142         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 143
 144         return _SUCCESS;
 145
 146 _recv_indicatepkt_drop:
 147
 148          /* enqueue back to free_recv_queue */
 149                 rtw_free_recvframe(precv_frame, pfree_recv_queue);
 150
 151          return _FAIL;
 152 }
 153
 154 static void _rtw_reordering_ctrl_timeout_handler(struct timer_list *t)
 155 {
 156         struct recv_reorder_ctrl *preorder_ctrl;
 157
 158         preorder_ctrl = from_timer(preorder_ctrl, t, reordering_ctrl_timer);
 159         rtw_reordering_ctrl_timeout_handler(preorder_ctrl);
 160 }
 161
 162 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 163 {
 164         timer_setup(&preorder_ctrl->reordering_ctrl_timer, _rtw_reordering_ctrl_timeout_handler, 0);
 165 }