drivers/staging/rtl8723bs/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 #define _RECV_OSDEP_C_
  16
  17 #include <drv_types.h>
  18 #include <rtw_debug.h>
  19 #include <linux/jiffies.h>
  20
  21 void rtw_os_free_recvframe(union recv_frame *precvframe)
  22 {
  23         if (precvframe->u.hdr.pkt)
  24         {
  25                 dev_kfree_skb_any(precvframe->u.hdr.pkt);/* free skb by driver */
  26
  27                 precvframe->u.hdr.pkt = NULL;
  28         }
  29 }
  30
  31 /* alloc os related resource in union recv_frame */
  32 int rtw_os_recv_resource_alloc(struct adapter *padapter, union recv_frame *precvframe)
  33 {
  34         int     res = _SUCCESS;
  35
  36         precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
  37
  38         return res;
  39 }
  40
  41 /* free os related resource in union recv_frame */
  42 void rtw_os_recv_resource_free(struct recv_priv *precvpriv)
  43 {
  44         sint i;
  45         union recv_frame *precvframe;
  46         precvframe = (union recv_frame*) precvpriv->precv_frame_buf;
  47
  48         for (i = 0; i < NR_RECVFRAME; i++)
  49         {
  50                 if (precvframe->u.hdr.pkt)
  51                 {
  52                         dev_kfree_skb_any(precvframe->u.hdr.pkt);/* free skb by driver */
  53                         precvframe->u.hdr.pkt = NULL;
  54                 }
  55                 precvframe++;
  56         }
  57 }
  58
  59 /* free os related resource in struct recv_buf */
  60 int rtw_os_recvbuf_resource_free(struct adapter *padapter, struct recv_buf *precvbuf)
  61 {
  62         int ret = _SUCCESS;
  63
  64         if (precvbuf->pskb)
  65         {
  66                 dev_kfree_skb_any(precvbuf->pskb);
  67         }
  68         return ret;
  69
  70 }
  71
  72 _pkt *rtw_os_alloc_msdu_pkt(union recv_frame *prframe, u16 nSubframe_Length, u8 *pdata)
  73 {
  74         u16 eth_type;
  75         _pkt *sub_skb;
  76         struct rx_pkt_attrib *pattrib;
  77
  78         pattrib = &prframe->u.hdr.attrib;
  79
  80         sub_skb = rtw_skb_alloc(nSubframe_Length + 12);
  81         if (sub_skb)
  82         {
  83                 skb_reserve(sub_skb, 12);
  84                 skb_put_data(sub_skb, (pdata + ETH_HLEN), nSubframe_Length);
  85         }
  86         else
  87         {
  88                 sub_skb = rtw_skb_clone(prframe->u.hdr.pkt);
  89                 if (sub_skb)
  90                 {
  91                         sub_skb->data = pdata + ETH_HLEN;
  92                         sub_skb->len = nSubframe_Length;
  93                         skb_set_tail_pointer(sub_skb, nSubframe_Length);
  94                 }
  95                 else
  96                 {
  97                         DBG_871X("%s(): rtw_skb_clone() Fail!!!\n", __func__);
  98                         return NULL;
  99                 }
 100         }
 101
 102         eth_type = RTW_GET_BE16(&sub_skb->data[6]);
 103
 104         if (sub_skb->len >= 8 &&
 105                 ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
 106                   eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
 107                  !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
 108                 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
 109                 skb_pull(sub_skb, SNAP_SIZE);
 110                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
 111                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
 112         } else {
 113                 __be16 len;
 114                 /* Leave Ethernet header part of hdr and full payload */
 115                 len = htons(sub_skb->len);
 116                 memcpy(skb_push(sub_skb, 2), &len, 2);
 117                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
 118                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
 119         }
 120
 121         return sub_skb;
 122 }
 123
 124 void rtw_os_recv_indicate_pkt(struct adapter *padapter, _pkt *pkt, struct rx_pkt_attrib *pattrib)
 125 {
 126         struct mlme_priv*pmlmepriv = &padapter->mlmepriv;
 127         int ret;
 128
 129         /* Indicat the packets to upper layer */
 130         if (pkt) {
 131                 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true)
 132                 {
 133                         _pkt *pskb2 = NULL;
 134                         struct sta_info *psta = NULL;
 135                         struct sta_priv *pstapriv = &padapter->stapriv;
 136                         int bmcast = IS_MCAST(pattrib->dst);
 137
 138                         /* DBG_871X("bmcast =%d\n", bmcast); */
 139
 140                         if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN))
 141                         {
 142                                 /* DBG_871X("not ap psta =%p, addr =%pM\n", psta, pattrib->dst); */
 143
 144                                 if (bmcast)
 145                                 {
 146                                         psta = rtw_get_bcmc_stainfo(padapter);
 147                                         pskb2 = rtw_skb_clone(pkt);
 148                                 } else {
 149                                         psta = rtw_get_stainfo(pstapriv, pattrib->dst);
 150                                 }
 151
 152                                 if (psta)
 153                                 {
 154                                         struct net_device *pnetdev = (struct net_device*)padapter->pnetdev;
 155
 156                                         /* DBG_871X("directly forwarding to the rtw_xmit_entry\n"); */
 157
 158                                         /* skb->ip_summed = CHECKSUM_NONE; */
 159                                         pkt->dev = pnetdev;
 160                                         skb_set_queue_mapping(pkt, rtw_recv_select_queue(pkt));
 161
 162                                         _rtw_xmit_entry(pkt, pnetdev);
 163
 164                                         if (bmcast && (pskb2 != NULL)) {
 165                                                 pkt = pskb2;
 166                                                 DBG_COUNTER(padapter->rx_logs.os_indicate_ap_mcast);
 167                                         } else {
 168                                                 DBG_COUNTER(padapter->rx_logs.os_indicate_ap_forward);
 169                                                 return;
 170                                         }
 171                                 }
 172                         }
 173                         else/*  to APself */
 174                         {
 175                                 /* DBG_871X("to APSelf\n"); */
 176                                 DBG_COUNTER(padapter->rx_logs.os_indicate_ap_self);
 177                         }
 178                 }
 179
 180                 pkt->protocol = eth_type_trans(pkt, padapter->pnetdev);
 181                 pkt->dev = padapter->pnetdev;
 182
 183 #ifdef CONFIG_TCP_CSUM_OFFLOAD_RX
 184                 if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1)) {
 185                         pkt->ip_summed = CHECKSUM_UNNECESSARY;
 186                 } else {
 187                         pkt->ip_summed = CHECKSUM_NONE;
 188                 }
 189 #else /* !CONFIG_TCP_CSUM_OFFLOAD_RX */
 190                 pkt->ip_summed = CHECKSUM_NONE;
 191 #endif /* CONFIG_TCP_CSUM_OFFLOAD_RX */
 192
 193                 ret = rtw_netif_rx(padapter->pnetdev, pkt);
 194                 if (ret == NET_RX_SUCCESS)
 195                         DBG_COUNTER(padapter->rx_logs.os_netif_ok);
 196                 else
 197                         DBG_COUNTER(padapter->rx_logs.os_netif_err);
 198         }
 199 }
 200
 201 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
 202 {
 203         enum nl80211_key_type key_type = 0;
 204         union iwreq_data wrqu;
 205         struct iw_michaelmicfailure    ev;
 206         struct mlme_priv*              pmlmepriv  = &padapter->mlmepriv;
 207         struct security_priv *psecuritypriv = &padapter->securitypriv;
 208         unsigned long cur_time = 0;
 209
 210         if (psecuritypriv->last_mic_err_time == 0)
 211         {
 212                 psecuritypriv->last_mic_err_time = jiffies;
 213         }
 214         else
 215         {
 216                 cur_time = jiffies;
 217
 218                 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ)
 219                 {
 220                         psecuritypriv->btkip_countermeasure = true;
 221                         psecuritypriv->last_mic_err_time = 0;
 222                         psecuritypriv->btkip_countermeasure_time = cur_time;
 223                 }
 224                 else
 225                 {
 226                         psecuritypriv->last_mic_err_time = jiffies;
 227                 }
 228         }
 229
 230         if (bgroup)
 231         {
 232                 key_type |= NL80211_KEYTYPE_GROUP;
 233         }
 234         else
 235         {
 236                 key_type |= NL80211_KEYTYPE_PAIRWISE;
 237         }
 238
 239         cfg80211_michael_mic_failure(padapter->pnetdev, (u8 *)&pmlmepriv->assoc_bssid[ 0 ], key_type, -1,
 240                 NULL, GFP_ATOMIC);
 241
 242         memset(&ev, 0x00, sizeof(ev));
 243         if (bgroup)
 244         {
 245             ev.flags |= IW_MICFAILURE_GROUP;
 246         }
 247         else
 248         {
 249             ev.flags |= IW_MICFAILURE_PAIRWISE;
 250         }
 251
 252         ev.src_addr.sa_family = ARPHRD_ETHER;
 253         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[ 0 ], ETH_ALEN);
 254
 255         memset(&wrqu, 0x00, sizeof(wrqu));
 256         wrqu.data.length = sizeof(ev);
 257 }
 258
 259 #ifdef CONFIG_AUTO_AP_MODE
 260 static void rtw_os_ksocket_send(struct adapter *padapter, union recv_frame *precv_frame)
 261 {
 262         _pkt *skb = precv_frame->u.hdr.pkt;
 263         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 264         struct sta_info *psta = precv_frame->u.hdr.psta;
 265
 266         DBG_871X("eth rx: got eth_type = 0x%x\n", pattrib->eth_type);
 267
 268         if (psta && psta->isrc && psta->pid>0)
 269         {
 270                 u16 rx_pid;
 271
 272                 rx_pid = *(u16*)(skb->data+ETH_HLEN);
 273
 274                 DBG_871X("eth rx(pid = 0x%x): sta("MAC_FMT") pid = 0x%x\n",
 275                         rx_pid, MAC_ARG(psta->hwaddr), psta->pid);
 276
 277                 if (rx_pid == psta->pid)
 278                 {
 279                         int i;
 280                         u16 len = *(u16*)(skb->data+ETH_HLEN+2);
 281                         /* u16 ctrl_type = *(u16*)(skb->data+ETH_HLEN+4); */
 282
 283                         /* DBG_871X("eth, RC: len = 0x%x, ctrl_type = 0x%x\n", len, ctrl_type); */
 284                         DBG_871X("eth, RC: len = 0x%x\n", len);
 285
 286                         for (i = 0;i<len;i++)
 287                                 DBG_871X("0x%x\n", *(skb->data+ETH_HLEN+4+i));
 288                                 /* DBG_871X("0x%x\n", *(skb->data+ETH_HLEN+6+i)); */
 289
 290                         DBG_871X("eth, RC-end\n");
 291                 }
 292
 293         }
 294
 295 }
 296 #endif /* CONFIG_AUTO_AP_MODE */
 297
 298 int rtw_recv_indicatepkt(struct adapter *padapter, union recv_frame *precv_frame)
 299 {
 300         struct recv_priv *precvpriv;
 301         struct __queue  *pfree_recv_queue;
 302         _pkt *skb;
 303         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 304
 305         DBG_COUNTER(padapter->rx_logs.os_indicate);
 306
 307         precvpriv = &(padapter->recvpriv);
 308         pfree_recv_queue = &(precvpriv->free_recv_queue);
 309
 310         skb = precv_frame->u.hdr.pkt;
 311         if (skb == NULL)
 312         {
 313                 RT_TRACE(_module_recv_osdep_c_, _drv_err_, ("rtw_recv_indicatepkt():skb == NULL something wrong!!!!\n"));
 314                 goto _recv_indicatepkt_drop;
 315         }
 316
 317         RT_TRACE(_module_recv_osdep_c_, _drv_info_, ("rtw_recv_indicatepkt():skb != NULL !!!\n"));
 318         RT_TRACE(_module_recv_osdep_c_, _drv_info_, ("rtw_recv_indicatepkt():precv_frame->u.hdr.rx_head =%p  precv_frame->hdr.rx_data =%p\n", precv_frame->u.hdr.rx_head, precv_frame->u.hdr.rx_data));
 319         RT_TRACE(_module_recv_osdep_c_, _drv_info_, ("precv_frame->hdr.rx_tail =%p precv_frame->u.hdr.rx_end =%p precv_frame->hdr.len =%d\n", precv_frame->u.hdr.rx_tail, precv_frame->u.hdr.rx_end, precv_frame->u.hdr.len));
 320
 321         skb->data = precv_frame->u.hdr.rx_data;
 322
 323         skb_set_tail_pointer(skb, precv_frame->u.hdr.len);
 324
 325         skb->len = precv_frame->u.hdr.len;
 326
 327         RT_TRACE(_module_recv_osdep_c_, _drv_info_, ("\n skb->head =%p skb->data =%p skb->tail =%p skb->end =%p skb->len =%d\n", skb->head, skb->data, skb_tail_pointer(skb), skb_end_pointer(skb), skb->len));
 328
 329 #ifdef CONFIG_AUTO_AP_MODE
 330         if (0x8899 == pattrib->eth_type)
 331         {
 332                 rtw_os_ksocket_send(padapter, precv_frame);
 333
 334                 /* goto _recv_indicatepkt_drop; */
 335         }
 336 #endif /* CONFIG_AUTO_AP_MODE */
 337
 338         rtw_os_recv_indicate_pkt(padapter, skb, pattrib);
 339
 340         precv_frame->u.hdr.pkt = NULL; /*  pointers to NULL before rtw_free_recvframe() */
 341
 342         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 343
 344         RT_TRACE(_module_recv_osdep_c_, _drv_info_, ("\n rtw_recv_indicatepkt :after rtw_os_recv_indicate_pkt!!!!\n"));
 345
 346         return _SUCCESS;
 347
 348 _recv_indicatepkt_drop:
 349
 350          /* enqueue back to free_recv_queue */
 351          rtw_free_recvframe(precv_frame, pfree_recv_queue);
 352
 353          DBG_COUNTER(padapter->rx_logs.os_indicate_err);
 354          return _FAIL;
 355 }
 356
 357 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 358 {
 359         struct adapter *padapter = preorder_ctrl->padapter;
 360
 361         _init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev, rtw_reordering_ctrl_timeout_handler, preorder_ctrl);
 362
 363 }