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 #include <drv_types.h>
   8 #include <rtw_debug.h>
   9 #include <linux/jiffies.h>
  10 #include <net/cfg80211.h>
  11 #include <asm/unaligned.h>
  12
  13 void rtw_os_free_recvframe(union recv_frame *precvframe)
  14 {
  15         if (precvframe->u.hdr.pkt) {
  16                 dev_kfree_skb_any(precvframe->u.hdr.pkt);/* free skb by driver */
  17
  18                 precvframe->u.hdr.pkt = NULL;
  19         }
  20 }
  21
  22 /* alloc os related resource in union recv_frame */
  23 void rtw_os_recv_resource_alloc(struct adapter *padapter, union recv_frame *precvframe)
  24 {
  25         precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
  26 }
  27
  28 /* free os related resource in union recv_frame */
  29 void rtw_os_recv_resource_free(struct recv_priv *precvpriv)
  30 {
  31         signed int i;
  32         union recv_frame *precvframe;
  33
  34         precvframe = (union recv_frame *) precvpriv->precv_frame_buf;
  35
  36         for (i = 0; i < NR_RECVFRAME; i++) {
  37                 if (precvframe->u.hdr.pkt) {
  38                         /* free skb by driver */
  39                         dev_kfree_skb_any(precvframe->u.hdr.pkt);
  40                         precvframe->u.hdr.pkt = NULL;
  41                 }
  42                 precvframe++;
  43         }
  44 }
  45
  46 /* free os related resource in struct recv_buf */
  47 void rtw_os_recvbuf_resource_free(struct adapter *padapter, struct recv_buf *precvbuf)
  48 {
  49         if (precvbuf->pskb) {
  50                 dev_kfree_skb_any(precvbuf->pskb);
  51         }
  52 }
  53
  54 struct sk_buff *rtw_os_alloc_msdu_pkt(union recv_frame *prframe, u16 nSubframe_Length, u8 *pdata)
  55 {
  56         u16 eth_type;
  57         struct sk_buff *sub_skb;
  58         struct rx_pkt_attrib *pattrib;
  59
  60         pattrib = &prframe->u.hdr.attrib;
  61
  62         sub_skb = rtw_skb_alloc(nSubframe_Length + 12);
  63         if (!sub_skb)
  64                 return NULL;
  65
  66         skb_reserve(sub_skb, 12);
  67         skb_put_data(sub_skb, (pdata + ETH_HLEN), nSubframe_Length);
  68
  69         eth_type = get_unaligned_be16(&sub_skb->data[6]);
  70
  71         if (sub_skb->len >= 8 &&
  72                 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
  73                   eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
  74                  !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
  75                 /*
  76                  * remove RFC1042 or Bridge-Tunnel encapsulation and replace
  77                  * EtherType
  78                  */
  79                 skb_pull(sub_skb, SNAP_SIZE);
  80                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
  81                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
  82         } else {
  83                 __be16 len;
  84                 /* Leave Ethernet header part of hdr and full payload */
  85                 len = htons(sub_skb->len);
  86                 memcpy(skb_push(sub_skb, 2), &len, 2);
  87                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
  88                 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
  89         }
  90
  91         return sub_skb;
  92 }
  93
  94 void rtw_os_recv_indicate_pkt(struct adapter *padapter, struct sk_buff *pkt, struct rx_pkt_attrib *pattrib)
  95 {
  96         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
  97
  98         /* Indicate the packets to upper layer */
  99         if (pkt) {
 100                 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 101                         struct sk_buff *pskb2 = NULL;
 102                         struct sta_info *psta = NULL;
 103                         struct sta_priv *pstapriv = &padapter->stapriv;
 104                         int bmcast = is_multicast_ether_addr(pattrib->dst);
 105
 106                         if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)) {
 107                                 if (bmcast) {
 108                                         psta = rtw_get_bcmc_stainfo(padapter);
 109                                         pskb2 = skb_clone(pkt, GFP_ATOMIC);
 110                                 } else {
 111                                         psta = rtw_get_stainfo(pstapriv, pattrib->dst);
 112                                 }
 113
 114                                 if (psta) {
 115                                         struct net_device *pnetdev = (struct net_device *)padapter->pnetdev;
 116                                         /* skb->ip_summed = CHECKSUM_NONE; */
 117                                         pkt->dev = pnetdev;
 118                                         skb_set_queue_mapping(pkt, rtw_recv_select_queue(pkt));
 119
 120                                         _rtw_xmit_entry(pkt, pnetdev);
 121
 122                                         if (bmcast && pskb2)
 123                                                 pkt = pskb2;
 124                                         else
 125                                                 return;
 126                                 }
 127                         } else {
 128                                 /*  to APself */
 129                         }
 130                 }
 131
 132                 pkt->protocol = eth_type_trans(pkt, padapter->pnetdev);
 133                 pkt->dev = padapter->pnetdev;
 134
 135                 pkt->ip_summed = CHECKSUM_NONE;
 136
 137                 rtw_netif_rx(padapter->pnetdev, pkt);
 138         }
 139 }
 140
 141 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
 142 {
 143         enum nl80211_key_type key_type = 0;
 144         union iwreq_data wrqu;
 145         struct iw_michaelmicfailure    ev;
 146         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 147         struct security_priv *psecuritypriv = &padapter->securitypriv;
 148         unsigned long cur_time = 0;
 149
 150         if (psecuritypriv->last_mic_err_time == 0) {
 151                 psecuritypriv->last_mic_err_time = jiffies;
 152         } else {
 153                 cur_time = jiffies;
 154
 155                 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
 156                         psecuritypriv->btkip_countermeasure = true;
 157                         psecuritypriv->last_mic_err_time = 0;
 158                         psecuritypriv->btkip_countermeasure_time = cur_time;
 159                 } else {
 160                         psecuritypriv->last_mic_err_time = jiffies;
 161                 }
 162         }
 163
 164         if (bgroup) {
 165                 key_type |= NL80211_KEYTYPE_GROUP;
 166         } else {
 167                 key_type |= NL80211_KEYTYPE_PAIRWISE;
 168         }
 169
 170         cfg80211_michael_mic_failure(padapter->pnetdev, (u8 *)&pmlmepriv->assoc_bssid[0], key_type, -1,
 171                 NULL, GFP_ATOMIC);
 172
 173         memset(&ev, 0x00, sizeof(ev));
 174         if (bgroup) {
 175                 ev.flags |= IW_MICFAILURE_GROUP;
 176         } else {
 177                 ev.flags |= IW_MICFAILURE_PAIRWISE;
 178         }
 179
 180         ev.src_addr.sa_family = ARPHRD_ETHER;
 181         memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
 182
 183         memset(&wrqu, 0x00, sizeof(wrqu));
 184         wrqu.data.length = sizeof(ev);
 185 }
 186
 187 int rtw_recv_indicatepkt(struct adapter *padapter, union recv_frame *precv_frame)
 188 {
 189         struct recv_priv *precvpriv;
 190         struct __queue  *pfree_recv_queue;
 191         struct sk_buff *skb;
 192         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
 193
 194         precvpriv = &(padapter->recvpriv);
 195         pfree_recv_queue = &(precvpriv->free_recv_queue);
 196
 197         skb = precv_frame->u.hdr.pkt;
 198         if (!skb)
 199                 goto _recv_indicatepkt_drop;
 200
 201         skb->data = precv_frame->u.hdr.rx_data;
 202
 203         skb_set_tail_pointer(skb, precv_frame->u.hdr.len);
 204
 205         skb->len = precv_frame->u.hdr.len;
 206
 207         rtw_os_recv_indicate_pkt(padapter, skb, pattrib);
 208
 209         /* pointers to NULL before rtw_free_recvframe() */
 210         precv_frame->u.hdr.pkt = NULL;
 211
 212         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 213
 214         return _SUCCESS;
 215
 216 _recv_indicatepkt_drop:
 217
 218         /* enqueue back to free_recv_queue */
 219         rtw_free_recvframe(precv_frame, pfree_recv_queue);
 220
 221         return _FAIL;
 222 }
 223
 224 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
 225 {
 226         timer_setup(&preorder_ctrl->reordering_ctrl_timer,
 227                     rtw_reordering_ctrl_timeout_handler, 0);
 228
 229 }