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/ethernet.h"
  14 #include "../include/usb_ops.h"
  15
  16 /* init os related resource in struct recv_priv */
  17 int rtw_os_recv_resource_init(struct recv_priv *precvpriv,
  18                               struct adapter *padapter)
  19 {
  20         return _SUCCESS;
  21 }
  22
  23 /* alloc os related resource in struct recv_frame */
  24 int rtw_os_recv_resource_alloc(struct adapter *padapter,
  25                                struct recv_frame *precvframe)
  26 {
  27         precvframe->pkt_newalloc = NULL;
  28         precvframe->pkt = NULL;
  29         return _SUCCESS;
  30 }
  31
  32 /* free os related resource in struct recv_frame */
  33 void rtw_os_recv_resource_free(struct recv_priv *precvpriv)
  34 {
  35 }
  36
  37 /* alloc os related resource in struct recv_buf */
  38 int rtw_os_recvbuf_resource_alloc(struct adapter *padapter,
  39                                   struct recv_buf *precvbuf)
  40 {
  41         int res = _SUCCESS;
  42
  43         precvbuf->irp_pending = false;
  44         precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
  45         if (!precvbuf->purb)
  46                 res = _FAIL;
  47         precvbuf->pskb = NULL;
  48         precvbuf->reuse = false;
  49         precvbuf->pallocated_buf = NULL;
  50         precvbuf->pbuf = NULL;
  51         precvbuf->pdata = NULL;
  52         precvbuf->phead = NULL;
  53         precvbuf->ptail = NULL;
  54         precvbuf->pend = NULL;
  55         precvbuf->transfer_len = 0;
  56         precvbuf->len = 0;
  57         return res;
  58 }
  59
  60 /* free os related resource in struct recv_buf */
  61 int rtw_os_recvbuf_resource_free(struct adapter *padapter,
  62                                  struct recv_buf *precvbuf)
  63 {
  64                 usb_free_urb(precvbuf->purb);
  65         return _SUCCESS;
  66 }
  67
  68 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
  69 {
  70         union iwreq_data wrqu;
  71         struct iw_michaelmicfailure    ev;
  72         struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
  73         struct security_priv    *psecuritypriv = &padapter->securitypriv;
  74         u32 cur_time = 0;
  75
  76         if (psecuritypriv->last_mic_err_time == 0) {
  77                 psecuritypriv->last_mic_err_time = jiffies;
  78         } else {
  79                 cur_time = jiffies;
  80
  81                 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
  82                         psecuritypriv->btkip_countermeasure = true;
  83                         psecuritypriv->last_mic_err_time = 0;
  84                         psecuritypriv->btkip_countermeasure_time = cur_time;
  85                 } else {
  86                         psecuritypriv->last_mic_err_time = jiffies;
  87                 }
  88         }
  89
  90         memset(&ev, 0x00, sizeof(ev));
  91         if (bgroup)
  92                 ev.flags |= IW_MICFAILURE_GROUP;
  93         else
  94                 ev.flags |= IW_MICFAILURE_PAIRWISE;
  95
  96         ev.src_addr.sa_family = ARPHRD_ETHER;
  97         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
  98         memset(&wrqu, 0x00, sizeof(wrqu));
  99         wrqu.data.length = sizeof(ev);
 100         wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE,
 101                             &wrqu, (char *)&ev);
 102 }
 103
 104 void rtw_hostapd_mlme_rx(struct adapter *padapter,
 105                          struct recv_frame *precv_frame)
 106 {
 107 }
 108
 109 int rtw_recv_indicatepkt(struct adapter *padapter,
 110                          struct recv_frame *precv_frame)
 111 {
 112         struct recv_priv *precvpriv;
 113         struct __queue *pfree_recv_queue;
 114         struct sk_buff *skb;
 115         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 116
 117         precvpriv = &padapter->recvpriv;
 118         pfree_recv_queue = &precvpriv->free_recv_queue;
 119
 120         skb = precv_frame->pkt;
 121         if (!skb)
 122                 goto _recv_indicatepkt_drop;
 123
 124         skb->data = precv_frame->rx_data;
 125
 126         skb_set_tail_pointer(skb, precv_frame->len);
 127
 128         skb->len = precv_frame->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         return _SUCCESS;
 181
 182 _recv_indicatepkt_drop:
 183
 184          /* enqueue back to free_recv_queue */
 185                 rtw_free_recvframe(precv_frame, pfree_recv_queue);
 186
 187          return _FAIL;
 188 }
 189
 190 void rtw_os_read_port(struct adapter *padapter, struct recv_buf *precvbuf)
 191 {
 192         struct recv_priv *precvpriv = &padapter->recvpriv;
 193
 194         precvbuf->ref_cnt--;
 195         /* free skb in recv_buf */
 196         dev_kfree_skb_any(precvbuf->pskb);
 197         precvbuf->pskb = NULL;
 198         precvbuf->reuse = false;
 199         if (!precvbuf->irp_pending)
 200                 rtw_read_port(padapter, precvpriv->ff_hwaddr, 0,
 201                               (unsigned char *)precvbuf);
 202 }
 203
 204 static void _rtw_reordering_ctrl_timeout_handler(struct timer_list *t)
 205 {
 206         struct recv_reorder_ctrl *preorder_ctrl;
 207
 208         preorder_ctrl = from_timer(preorder_ctrl, t, reordering_ctrl_timer);
 209         rtw_reordering_ctrl_timeout_handler(preorder_ctrl);
 210 }
 211
 212 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 213 {
 214         timer_setup(&preorder_ctrl->reordering_ctrl_timer, _rtw_reordering_ctrl_timeout_handler, 0);
 215 }