drivers/staging/rtl8723bs/os_dep/recv_linux.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   5  *
   6  ******************************************************************************/
   7 #define _RECV_OSDEP_C_
   8
   9 #include <drv_types.h>
  10 #include <rtw_debug.h>
  11 #include <linux/jiffies.h>
  12 #include <net/cfg80211.h>
  13 #include <asm/unaligned.h>
  14
  15 void rtw_os_free_recvframe(union recv_frame *precvframe)
  16 {
  17         if (precvframe->u.hdr.pkt) {
  18                 dev_kfree_skb_any(precvframe->u.hdr.pkt);/* free skb by driver */
  19
  20                 precvframe->u.hdr.pkt = NULL;
  21         }
  22 }
  23
  24 /* alloc os related resource in union recv_frame */
  25 void rtw_os_recv_resource_alloc(struct adapter *padapter, union recv_frame *precvframe)
  26 {
  27         precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
  28 }
  29
  30 /* free os related resource in union recv_frame */
  31 void rtw_os_recv_resource_free(struct recv_priv *precvpriv)
  32 {
  33         sint i;
  34         union recv_frame *precvframe;
  35
  36         precvframe = (union recv_frame*) precvpriv->precv_frame_buf;
  37
  38         for (i = 0; i < NR_RECVFRAME; i++) {
  39                 if (precvframe->u.hdr.pkt) {
  40                         /* free skb by driver */
  41                         dev_kfree_skb_any(precvframe->u.hdr.pkt);
  42                         precvframe->u.hdr.pkt = NULL;
  43                 }
  44                 precvframe++;
  45         }
  46 }
  47
  48 /* free os related resource in struct recv_buf */
  49 void rtw_os_recvbuf_resource_free(struct adapter *padapter, struct recv_buf *precvbuf)
  50 {
  51         if (precvbuf->pskb) {
  52                 dev_kfree_skb_any(precvbuf->pskb);
  53         }
  54 }
  55
  56 _pkt *rtw_os_alloc_msdu_pkt(union recv_frame *prframe, u16 nSubframe_Length, u8 *pdata)
  57 {
  58         u16 eth_type;
  59         _pkt *sub_skb;
  60         struct rx_pkt_attrib *pattrib;
  61
  62         pattrib = &prframe->u.hdr.attrib;
  63
  64         sub_skb = rtw_skb_alloc(nSubframe_Length + 12);
  65         if (!sub_skb) {
  66                 DBG_871X("%s(): rtw_skb_alloc() Fail!!!\n", __func__);
  67                 return NULL;
  68         }
  69
  70         skb_reserve(sub_skb, 12);
  71         skb_put_data(sub_skb, (pdata + ETH_HLEN), nSubframe_Length);
  72
  73         eth_type = get_unaligned_be16(&sub_skb->data[6]);
  74
  75         if (sub_skb->len >= 8 &&
  76                 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
  77                   eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
  78                  !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
  79                 /*
  80                  * remove RFC1042 or Bridge-Tunnel encapsulation and replace
  81                  * EtherType
  82                  */
  83                 skb_pull(sub_skb, SNAP_SIZE);
  84                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
  85                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
  86         } else {
  87                 __be16 len;
  88                 /* Leave Ethernet header part of hdr and full payload */
  89                 len = htons(sub_skb->len);
  90                 memcpy(skb_push(sub_skb, 2), &len, 2);
  91                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
  92                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
  93         }
  94
  95         return sub_skb;
  96 }
  97
  98 void rtw_os_recv_indicate_pkt(struct adapter *padapter, _pkt *pkt, struct rx_pkt_attrib *pattrib)
  99 {
 100         struct mlme_priv*pmlmepriv = &padapter->mlmepriv;
 101         int ret;
 102
 103         /* Indicate the packets to upper layer */
 104         if (pkt) {
 105                 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 106                         _pkt *pskb2 = NULL;
 107                         struct sta_info *psta = NULL;
 108                         struct sta_priv *pstapriv = &padapter->stapriv;
 109                         int bmcast = IS_MCAST(pattrib->dst);
 110
 111                         if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)) {
 112                                 if (bmcast) {
 113                                         psta = rtw_get_bcmc_stainfo(padapter);
 114                                         pskb2 = skb_clone(pkt, GFP_ATOMIC);
 115                                 } else {
 116                                         psta = rtw_get_stainfo(pstapriv, pattrib->dst);
 117                                 }
 118
 119                                 if (psta) {
 120                                         struct net_device *pnetdev = (struct net_device*)padapter->pnetdev;
 121                                         /* skb->ip_summed = CHECKSUM_NONE; */
 122                                         pkt->dev = pnetdev;
 123                                         skb_set_queue_mapping(pkt, rtw_recv_select_queue(pkt));
 124
 125                                         _rtw_xmit_entry(pkt, pnetdev);
 126
 127                                         if (bmcast && (pskb2 != NULL)) {
 128                                                 pkt = pskb2;
 129                                                 DBG_COUNTER(padapter->rx_logs.os_indicate_ap_mcast);
 130                                         } else {
 131                                                 DBG_COUNTER(padapter->rx_logs.os_indicate_ap_forward);
 132                                                 return;
 133                                         }
 134                                 }
 135                         } else {
 136                                 /*  to APself */
 137                                 /* DBG_871X("to APSelf\n"); */
 138                                 DBG_COUNTER(padapter->rx_logs.os_indicate_ap_self);
 139                         }
 140                 }
 141
 142                 pkt->protocol = eth_type_trans(pkt, padapter->pnetdev);
 143                 pkt->dev = padapter->pnetdev;
 144
 145 #ifdef CONFIG_TCP_CSUM_OFFLOAD_RX
 146                 if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1))
 147                         pkt->ip_summed = CHECKSUM_UNNECESSARY;
 148                 else
 149                         pkt->ip_summed = CHECKSUM_NONE;
 150
 151 #else /* !CONFIG_TCP_CSUM_OFFLOAD_RX */
 152                 pkt->ip_summed = CHECKSUM_NONE;
 153 #endif /* CONFIG_TCP_CSUM_OFFLOAD_RX */
 154
 155                 ret = rtw_netif_rx(padapter->pnetdev, pkt);
 156                 if (ret == NET_RX_SUCCESS)
 157                         DBG_COUNTER(padapter->rx_logs.os_netif_ok);
 158                 else
 159                         DBG_COUNTER(padapter->rx_logs.os_netif_err);
 160         }
 161 }
 162
 163 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
 164 {
 165         enum nl80211_key_type key_type = 0;
 166         union iwreq_data wrqu;
 167         struct iw_michaelmicfailure    ev;
 168         struct mlme_priv*              pmlmepriv  = &padapter->mlmepriv;
 169         struct security_priv *psecuritypriv = &padapter->securitypriv;
 170         unsigned long cur_time = 0;
 171
 172         if (psecuritypriv->last_mic_err_time == 0) {
 173                 psecuritypriv->last_mic_err_time = jiffies;
 174         } else {
 175                 cur_time = jiffies;
 176
 177                 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
 178                         psecuritypriv->btkip_countermeasure = true;
 179                         psecuritypriv->last_mic_err_time = 0;
 180                         psecuritypriv->btkip_countermeasure_time = cur_time;
 181                 } else {
 182                         psecuritypriv->last_mic_err_time = jiffies;
 183                 }
 184         }
 185
 186         if (bgroup) {
 187                 key_type |= NL80211_KEYTYPE_GROUP;
 188         } else {
 189                 key_type |= NL80211_KEYTYPE_PAIRWISE;
 190         }
 191
 192         cfg80211_michael_mic_failure(padapter->pnetdev, (u8 *)&pmlmepriv->assoc_bssid[0], key_type, -1,
 193                 NULL, GFP_ATOMIC);
 194
 195         memset(&ev, 0x00, sizeof(ev));
 196         if (bgroup) {
 197                 ev.flags |= IW_MICFAILURE_GROUP;
 198         } else {
 199                 ev.flags |= IW_MICFAILURE_PAIRWISE;
 200         }
 201
 202         ev.src_addr.sa_family = ARPHRD_ETHER;
 203         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
 204
 205         memset(&wrqu, 0x00, sizeof(wrqu));
 206         wrqu.data.length = sizeof(ev);
 207 }
 208
 209 #ifdef CONFIG_AUTO_AP_MODE
 210 static void rtw_os_ksocket_send(struct adapter *padapter, union recv_frame *precv_frame)
 211 {
 212         _pkt *skb = precv_frame->u.hdr.pkt;
 213         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 214         struct sta_info *psta = precv_frame->u.hdr.psta;
 215
 216         DBG_871X("eth rx: got eth_type = 0x%x\n", pattrib->eth_type);
 217
 218         if (psta && psta->isrc && psta->pid > 0) {
 219                 u16 rx_pid;
 220
 221                 rx_pid = *(u16*)(skb->data+ETH_HLEN);
 222
 223                 DBG_871X("eth rx(pid = 0x%x): sta("MAC_FMT") pid = 0x%x\n",
 224                         rx_pid, MAC_ARG(psta->hwaddr), psta->pid);
 225
 226                 if (rx_pid == psta->pid) {
 227                         int i;
 228                         u16 len = *(u16 *)(skb->data+ETH_HLEN+2);
 229                         DBG_871X("eth, RC: len = 0x%x\n", len);
 230
 231                         for (i = 0; i < len; i++)
 232                                 DBG_871X("0x%x\n", *(skb->data+ETH_HLEN+4+i));
 233
 234                         DBG_871X("eth, RC-end\n");
 235                 }
 236
 237         }
 238
 239 }
 240 #endif /* CONFIG_AUTO_AP_MODE */
 241
 242 int rtw_recv_indicatepkt(struct adapter *padapter, union recv_frame *precv_frame)
 243 {
 244         struct recv_priv *precvpriv;
 245         struct __queue  *pfree_recv_queue;
 246         _pkt *skb;
 247         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 248
 249         DBG_COUNTER(padapter->rx_logs.os_indicate);
 250
 251         precvpriv = &(padapter->recvpriv);
 252         pfree_recv_queue = &(precvpriv->free_recv_queue);
 253
 254         skb = precv_frame->u.hdr.pkt;
 255         if (skb == NULL) {
 256                 RT_TRACE(_module_recv_osdep_c_, _drv_err_, ("rtw_recv_indicatepkt():skb == NULL something wrong!!!!\n"));
 257                 goto _recv_indicatepkt_drop;
 258         }
 259
 260         RT_TRACE(_module_recv_osdep_c_, _drv_info_, ("rtw_recv_indicatepkt():skb != NULL !!!\n"));
 261         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));
 262         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));
 263
 264         skb->data = precv_frame->u.hdr.rx_data;
 265
 266         skb_set_tail_pointer(skb, precv_frame->u.hdr.len);
 267
 268         skb->len = precv_frame->u.hdr.len;
 269
 270         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));
 271
 272 #ifdef CONFIG_AUTO_AP_MODE
 273         if (0x8899 == pattrib->eth_type) {
 274                 rtw_os_ksocket_send(padapter, precv_frame);
 275
 276                 /* goto _recv_indicatepkt_drop; */
 277         }
 278 #endif /* CONFIG_AUTO_AP_MODE */
 279
 280         rtw_os_recv_indicate_pkt(padapter, skb, pattrib);
 281
 282         /* pointers to NULL before rtw_free_recvframe() */
 283         precv_frame->u.hdr.pkt = NULL;
 284
 285         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 286
 287         RT_TRACE(_module_recv_osdep_c_, _drv_info_, ("\n rtw_recv_indicatepkt :after rtw_os_recv_indicate_pkt!!!!\n"));
 288
 289         return _SUCCESS;
 290
 291 _recv_indicatepkt_drop:
 292
 293         /* enqueue back to free_recv_queue */
 294         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 295
 296         DBG_COUNTER(padapter->rx_logs.os_indicate_err);
 297         return _FAIL;
 298 }
 299
 300 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 301 {
 302         timer_setup(&preorder_ctrl->reordering_ctrl_timer,
 303                     rtw_reordering_ctrl_timeout_handler, 0);
 304
 305 }