linux/drivers/staging/rtl8723bs/os_dep/recv_linux.c
<<
>>
Prefs
   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
  13void 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 */
  23void 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 */
  29void 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 */
  47void 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
  54struct 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
  94void 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_MCAST(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
 141void 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
 187int 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
 224void 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}
 230