- 根目录:
- drivers
- staging
- rtl8188eu
- core
- rtw_recv.c
/******************************************************************************
*
* Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
*
******************************************************************************/
#define _RTW_RECV_C_
#include <linux/ieee80211.h>
#include <osdep_service.h>
#include <drv_types.h>
#include <recv_osdep.h>
#include <mlme_osdep.h>
#include <mon.h>
#include <wifi.h>
#include <linux/vmalloc.h>
#define ETHERNET_HEADER_SIZE 14 /* Ethernet Header Length */
#define LLC_HEADER_SIZE 6 /* LLC Header Length */
static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
static u8 rtw_bridge_tunnel_header[] = {
0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
};
static u8 rtw_rfc1042_header[] = {
0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
};
void rtw_signal_stat_timer_hdl(unsigned long data);
void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
{
memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
spin_lock_init(&psta_recvpriv->lock);
_rtw_init_queue(&psta_recvpriv->defrag_q);
}
int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
{
int i;
struct recv_frame *precvframe;
int res = _SUCCESS;
_rtw_init_queue(&precvpriv->free_recv_queue);
_rtw_init_queue(&precvpriv->recv_pending_queue);
_rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
precvpriv->adapter = padapter;
precvpriv->free_recvframe_cnt = NR_RECVFRAME;
precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
if (!precvpriv->pallocated_frame_buf)
return _FAIL;
precvpriv->precv_frame_buf = (u8 *)N_BYTE_ALIGMENT((size_t)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ);
precvframe = (struct recv_frame *)precvpriv->precv_frame_buf;
for (i = 0; i < NR_RECVFRAME; i++) {
INIT_LIST_HEAD(&(precvframe->list));
list_add_tail(&(precvframe->list),
&(precvpriv->free_recv_queue.queue));
rtw_os_recv_resource_alloc(precvframe);
precvframe->len = 0;
precvframe->adapter = padapter;
precvframe++;
}
precvpriv->rx_pending_cnt = 1;
res = rtw_hal_init_recv_priv(padapter);
setup_timer(&precvpriv->signal_stat_timer,
rtw_signal_stat_timer_hdl,
(unsigned long)padapter);
precvpriv->signal_stat_sampling_interval = 1000; /* ms */
rtw_set_signal_stat_timer(precvpriv);
return res;
}
void _rtw_free_recv_priv(struct recv_priv *precvpriv)
{
struct adapter *padapter = precvpriv->adapter;
rtw_free_uc_swdec_pending_queue(padapter);
if (precvpriv->pallocated_frame_buf) {
vfree(precvpriv->pallocated_frame_buf);
}
rtw_hal_free_recv_priv(padapter);
}
struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
{
struct recv_frame *hdr;
struct list_head *plist, *phead;
struct adapter *padapter;
struct recv_priv *precvpriv;
if (list_empty(&pfree_recv_queue->queue)) {
hdr = NULL;
} else {
phead = get_list_head(pfree_recv_queue);
plist = phead->next;
hdr = container_of(plist, struct recv_frame, list);
list_del_init(&hdr->list);
padapter = hdr->adapter;
if (padapter != NULL) {
precvpriv = &padapter->recvpriv;
if (pfree_recv_queue == &precvpriv->free_recv_queue)
precvpriv->free_recvframe_cnt--;
}
}
return (struct recv_frame *)hdr;
}
struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
{
struct recv_frame *precvframe;
spin_lock_bh(&pfree_recv_queue->lock);
precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
spin_unlock_bh(&pfree_recv_queue->lock);
return precvframe;
}
int rtw_free_recvframe(struct recv_frame *precvframe,
struct __queue *pfree_recv_queue)
{
struct adapter *padapter;
struct recv_priv *precvpriv;
if (!precvframe)
return _FAIL;
padapter = precvframe->adapter;
precvpriv = &padapter->recvpriv;
if (precvframe->pkt) {
dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
precvframe->pkt = NULL;
}
spin_lock_bh(&pfree_recv_queue->lock);
list_del_init(&(precvframe->list));
precvframe->len = 0;
list_add_tail(&(precvframe->list), get_list_head(pfree_recv_queue));
if (padapter != NULL) {
if (pfree_recv_queue == &precvpriv->free_recv_queue)
precvpriv->free_recvframe_cnt++;
}
spin_unlock_bh(&pfree_recv_queue->lock);
return _SUCCESS;
}
int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
{
struct adapter *padapter = precvframe->adapter;
struct recv_priv *precvpriv = &padapter->recvpriv;
list_del_init(&(precvframe->list));
list_add_tail(&(precvframe->list), get_list_head(queue));
if (padapter != NULL) {
if (queue == &precvpriv->free_recv_queue)
precvpriv->free_recvframe_cnt++;
}
return _SUCCESS;
}
int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
{
int ret;
spin_lock_bh(&queue->lock);
ret = _rtw_enqueue_recvframe(precvframe, queue);
spin_unlock_bh(&queue->lock);
return ret;
}
/*
caller : defrag ; recvframe_chk_defrag in recv_thread (passive)
pframequeue: defrag_queue : will be accessed in recv_thread (passive)
using spinlock to protect
*/
void rtw_free_recvframe_queue(struct __queue *pframequeue, struct __queue *pfree_recv_queue)
{
struct recv_frame *hdr;
struct list_head *plist, *phead;
spin_lock(&pframequeue->lock);
phead = get_list_head(pframequeue);
plist = phead->next;
while (phead != plist) {
hdr = container_of(plist, struct recv_frame, list);
plist = plist->next;
rtw_free_recvframe((struct recv_frame *)hdr, pfree_recv_queue);
}
spin_unlock(&pframequeue->lock);
}
u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
{
u32 cnt = 0;
struct recv_frame *pending_frame;
while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
cnt++;
}
return cnt;
}
static int recvframe_chkmic(struct adapter *adapter,
struct recv_frame *precvframe)
{
int i, res = _SUCCESS;
u32 datalen;
u8 miccode[8];
u8 bmic_err = false, brpt_micerror = true;
u8 *pframe, *payload, *pframemic;
u8 *mickey;
struct sta_info *stainfo;
struct rx_pkt_attrib *prxattrib = &precvframe->attrib;
struct security_priv *psecuritypriv = &adapter->securitypriv;
struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
if (prxattrib->encrypt == _TKIP_) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:prxattrib->encrypt==_TKIP_\n"));
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:da=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
/* calculate mic code */
if (stainfo != NULL) {
if (IS_MCAST(prxattrib->ra)) {
if (!psecuritypriv) {
res = _FAIL;
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n"));
DBG_88E("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n");
goto exit;
}
mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic: bcmc key\n"));
} else {
mickey = &stainfo->dot11tkiprxmickey.skey[0];
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic: unicast key\n"));
}
/* icv_len included the mic code */
datalen = precvframe->len-prxattrib->hdrlen -
prxattrib->iv_len-prxattrib->icv_len-8;
pframe = precvframe->rx_data;
payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
(unsigned char)prxattrib->priority); /* care the length of the data */
pframemic = payload+datalen;
bmic_err = false;
for (i = 0; i < 8; i++) {
if (miccode[i] != *(pframemic+i)) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
("recvframe_chkmic:miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
i, miccode[i], i, *(pframemic+i)));
bmic_err = true;
}
}
if (bmic_err) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
*(pframemic-8), *(pframemic-7), *(pframemic-6),
*(pframemic-5), *(pframemic-4), *(pframemic-3),
*(pframemic-2), *(pframemic-1)));
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
*(pframemic-16), *(pframemic-15), *(pframemic-14),
*(pframemic-13), *(pframemic-12), *(pframemic-11),
*(pframemic-10), *(pframemic-9)));
{
uint i;
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
("\n ======demp packet (len=%d)======\n",
precvframe->len));
for (i = 0; i < precvframe->len; i += 8) {
RT_TRACE(_module_rtl871x_recv_c_,
_drv_err_,
("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
*(precvframe->rx_data+i),
*(precvframe->rx_data+i+1),
*(precvframe->rx_data+i+2),
*(precvframe->rx_data+i+3),
*(precvframe->rx_data+i+4),
*(precvframe->rx_data+i+5),
*(precvframe->rx_data+i+6),
*(precvframe->rx_data+i+7)));
}
RT_TRACE(_module_rtl871x_recv_c_,
_drv_err_,
("\n ====== demp packet end [len=%d]======\n",
precvframe->len));
RT_TRACE(_module_rtl871x_recv_c_,
_drv_err_,
("\n hrdlen=%d,\n",
prxattrib->hdrlen));
}
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
/* double check key_index for some timing issue , */
/* cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
if ((IS_MCAST(prxattrib->ra) == true) && (prxattrib->key_index != pmlmeinfo->key_index))
brpt_micerror = false;
if ((prxattrib->bdecrypted) && (brpt_micerror)) {
rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
} else {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
}
res = _FAIL;
} else {
/* mic checked ok */
if ((!psecuritypriv->bcheck_grpkey) && (IS_MCAST(prxattrib->ra))) {
psecuritypriv->bcheck_grpkey = true;
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
}
}
} else {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic: rtw_get_stainfo==NULL!!!\n"));
}
recvframe_pull_tail(precvframe, 8);
}
exit:
return res;
}
/* decrypt and set the ivlen, icvlen of the recv_frame */
static struct recv_frame *decryptor(struct adapter *padapter,
struct recv_frame *precv_frame)
{
struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct recv_frame *return_packet = precv_frame;
u32 res = _SUCCESS;
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
if (prxattrib->encrypt > 0) {
u8 *iv = precv_frame->rx_data+prxattrib->hdrlen;
prxattrib->key_index = (((iv[3])>>6)&0x3);
if (prxattrib->key_index > WEP_KEYS) {
DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
switch (prxattrib->encrypt) {
case _WEP40_:
case _WEP104_:
prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
break;
case _TKIP_:
case _AES_:
default:
prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
break;
}
}
}
if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) {
psecuritypriv->hw_decrypted = false;
switch (prxattrib->encrypt) {
case _WEP40_:
case _WEP104_:
rtw_wep_decrypt(padapter, (u8 *)precv_frame);
break;
case _TKIP_:
res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
break;
case _AES_:
res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
break;
default:
break;
}
} else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
(psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
psecuritypriv->hw_decrypted = true;
if (res == _FAIL) {
rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
return_packet = NULL;
}
return return_packet;
}
/* set the security information in the recv_frame */
static struct recv_frame *portctrl(struct adapter *adapter,
struct recv_frame *precv_frame)
{
u8 *psta_addr, *ptr;
uint auth_alg;
struct recv_frame *pfhdr;
struct sta_info *psta;
struct sta_priv *pstapriv;
struct recv_frame *prtnframe;
u16 ether_type;
u16 eapol_type = 0x888e;/* for Funia BD's WPA issue */
struct rx_pkt_attrib *pattrib;
__be16 be_tmp;
pstapriv = &adapter->stapriv;
auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
ptr = precv_frame->rx_data;
pfhdr = precv_frame;
pattrib = &pfhdr->attrib;
psta_addr = pattrib->ta;
psta = rtw_get_stainfo(pstapriv, psta_addr);
prtnframe = NULL;
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
if (auth_alg == 2) {
/* get ether_type */
ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
memcpy(&be_tmp, ptr, 2);
ether_type = ntohs(be_tmp);
if ((psta != NULL) && (psta->ieee8021x_blocked)) {
/* blocked */
/* only accept EAPOL frame */
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
if (ether_type == eapol_type) {
prtnframe = precv_frame;
} else {
/* free this frame */
rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
prtnframe = NULL;
}
} else {
/* allowed */
/* check decryption status, and decrypt the frame if needed */
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
precv_frame->attrib.privacy));
if (pattrib->bdecrypted == 0)
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
prtnframe = precv_frame;
/* check is the EAPOL frame or not (Rekey) */
if (ether_type == eapol_type) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
/* check Rekey */
prtnframe = precv_frame;
} else {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
}
}
} else {
prtnframe = precv_frame;
}
return prtnframe;
}
static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
struct stainfo_rxcache *prxcache)
{
int tid = precv_frame->attrib.priority;
u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
(precv_frame->attrib.frag_num & 0xf);
if (tid > 15) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
return _FAIL;
}
if (1) {/* if (bretry) */
if (seq_ctrl == prxcache->tid_rxseq[tid]) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, seq_ctrl=0x%x, tid=0x%x, tid_rxseq=0x%x\n", seq_ctrl, tid, prxcache->tid_rxseq[tid]));
return _FAIL;
}
}
prxcache->tid_rxseq[tid] = seq_ctrl;
return _SUCCESS;
}
static void process_pwrbit_data(struct adapter *padapter,
struct recv_frame *precv_frame)
{
#ifdef CONFIG_88EU_AP_MODE
unsigned char pwrbit;
u8 *ptr = precv_frame->rx_data;
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
struct sta_priv *pstapriv = &padapter->stapriv;
struct sta_info *psta = NULL;
psta = rtw_get_stainfo(pstapriv, pattrib->src);
pwrbit = GetPwrMgt(ptr);
if (psta) {
if (pwrbit) {
if (!(psta->state & WIFI_SLEEP_STATE))
stop_sta_xmit(padapter, psta);
} else {
if (psta->state & WIFI_SLEEP_STATE)
wakeup_sta_to_xmit(padapter, psta);
}
}
#endif
}
static void process_wmmps_data(struct adapter *padapter,
struct recv_frame *precv_frame)
{
#ifdef CONFIG_88EU_AP_MODE
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
struct sta_priv *pstapriv = &padapter->stapriv;
struct sta_info *psta = NULL;
psta = rtw_get_stainfo(pstapriv, pattrib->src);
if (!psta)
return;
if (!psta->qos_option)
return;
if (!(psta->qos_info&0xf))
return;
if (psta->state&WIFI_SLEEP_STATE) {
u8 wmmps_ac = 0;
switch (pattrib->priority) {
case 1:
case 2:
wmmps_ac = psta->uapsd_bk&BIT(1);
break;
case 4:
case 5:
wmmps_ac = psta->uapsd_vi&BIT(1);
break;
case 6:
case 7:
wmmps_ac = psta->uapsd_vo&BIT(1);
break;
case 0:
case 3:
default:
wmmps_ac = psta->uapsd_be&BIT(1);
break;
}
if (wmmps_ac) {
if (psta->sleepq_ac_len > 0) {
/* process received triggered frame */
xmit_delivery_enabled_frames(padapter, psta);
} else {
/* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
}
}
}
#endif
}
static void count_rx_stats(struct adapter *padapter,
struct recv_frame *prframe,
struct sta_info *sta)
{
int sz;
struct sta_info *psta = NULL;
struct stainfo_stats *pstats = NULL;
struct rx_pkt_attrib *pattrib = &prframe->attrib;
struct recv_priv *precvpriv = &padapter->recvpriv;
sz = prframe->len;
precvpriv->rx_bytes += sz;
padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
if (sta)
psta = sta;
else
psta = prframe->psta;
if (psta) {
pstats = &psta->sta_stats;
pstats->rx_data_pkts++;
pstats->rx_bytes += sz;
}
}
int sta2sta_data_frame(
struct adapter *adapter,
struct recv_frame *precv_frame,
struct sta_info **psta
);
int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
struct sta_info **psta)
{
u8 *ptr = precv_frame->rx_data;
int ret = _SUCCESS;
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
struct sta_priv *pstapriv = &adapter->stapriv;
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
u8 *mybssid = get_bssid(pmlmepriv);
u8 *myhwaddr = myid(&adapter->eeprompriv);
u8 *sta_addr = NULL;
int bmcast = IS_MCAST(pattrib->dst);
if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
(check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
/* filter packets that SA is myself or multicast or broadcast */
if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
ret = _FAIL;
goto exit;
}
if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
ret = _FAIL;
goto exit;
}
if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
!memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
ret = _FAIL;
goto exit;
}
sta_addr = pattrib->src;
} else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
/* For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
ret = _FAIL;
goto exit;
}
sta_addr = pattrib->bssid;
} else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
if (bmcast) {
/* For AP mode, if DA == MCAST, then BSSID should be also MCAST */
if (!IS_MCAST(pattrib->bssid)) {
ret = _FAIL;
goto exit;
}
} else { /* not mc-frame */
/* For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
ret = _FAIL;
goto exit;
}
sta_addr = pattrib->src;
}
} else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
sta_addr = mybssid;
} else {
ret = _FAIL;
}
if (bmcast)
*psta = rtw_get_bcmc_stainfo(adapter);
else
*psta = rtw_get_stainfo(pstapriv, sta_addr); /* get ap_info */
if (*psta == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
ret = _FAIL;
goto exit;
}
exit:
return ret;
}
static int ap2sta_data_frame(
struct adapter *adapter,
struct recv_frame *precv_frame,
struct sta_info **psta)
{
u8 *ptr = precv_frame->rx_data;
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
int ret = _SUCCESS;
struct sta_priv *pstapriv = &adapter->stapriv;
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
u8 *mybssid = get_bssid(pmlmepriv);
u8 *myhwaddr = myid(&adapter->eeprompriv);
int bmcast = IS_MCAST(pattrib->dst);
if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
(check_fwstate(pmlmepriv, _FW_LINKED) == true ||
check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
/* filter packets that SA is myself or multicast or broadcast */
if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
ret = _FAIL;
goto exit;
}
/* da should be for me */
if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
(" ap2sta_data_frame: compare DA fail; DA=%pM\n", (pattrib->dst)));
ret = _FAIL;
goto exit;
}
/* check BSSID */
if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
!memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
(memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
(" ap2sta_data_frame: compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
if (!bmcast) {
DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
}
ret = _FAIL;
goto exit;
}
if (bmcast)
*psta = rtw_get_bcmc_stainfo(adapter);
else
*psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get ap_info */
if (*psta == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
ret = _FAIL;
goto exit;
}
/* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
/* */
if (GetFrameSubType(ptr) & BIT(6)) {
/* No data, will not indicate to upper layer, temporily count it here */
count_rx_stats(adapter, precv_frame, *psta);
ret = RTW_RX_HANDLED;
goto exit;
}
} else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
(check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
/* */
memcpy(pattrib->bssid, mybssid, ETH_ALEN);
*psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */
if (*psta == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
ret = _FAIL;
goto exit;
}
} else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
/* Special case */
ret = RTW_RX_HANDLED;
goto exit;
} else {
if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
*psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */
if (*psta == NULL) {
DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
}
}
ret = _FAIL;
}
exit:
return ret;
}
static int sta2ap_data_frame(struct adapter *adapter,
struct recv_frame *precv_frame,
struct sta_info **psta)
{
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
struct sta_priv *pstapriv = &adapter->stapriv;
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
u8 *ptr = precv_frame->rx_data;
unsigned char *mybssid = get_bssid(pmlmepriv);
int ret = _SUCCESS;
if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
/* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
ret = _FAIL;
goto exit;
}
*psta = rtw_get_stainfo(pstapriv, pattrib->src);
if (*psta == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
ret = RTW_RX_HANDLED;
goto exit;
}
process_pwrbit_data(adapter, precv_frame);
if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) {
process_wmmps_data(adapter, precv_frame);
}
if (GetFrameSubType(ptr) & BIT(6)) {
/* No data, will not indicate to upper layer, temporily count it here */
count_rx_stats(adapter, precv_frame, *psta);
ret = RTW_RX_HANDLED;
goto exit;
}
} else {
u8 *myhwaddr = myid(&adapter->eeprompriv);
if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
ret = RTW_RX_HANDLED;
goto exit;
}
DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
ret = RTW_RX_HANDLED;
goto exit;
}
exit:
return ret;
}
static int validate_recv_ctrl_frame(struct adapter *padapter,
struct recv_frame *precv_frame)
{
#ifdef CONFIG_88EU_AP_MODE
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
struct sta_priv *pstapriv = &padapter->stapriv;
u8 *pframe = precv_frame->rx_data;
if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
return _FAIL;
/* receive the frames that ra(a1) is my address */
if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
return _FAIL;
/* only handle ps-poll */
if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
u16 aid;
u8 wmmps_ac = 0;
struct sta_info *psta = NULL;
aid = GetAid(pframe);
psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
if ((psta == NULL) || (psta->aid != aid))
return _FAIL;
/* for rx pkt statistics */
psta->sta_stats.rx_ctrl_pkts++;
switch (pattrib->priority) {
case 1:
case 2:
wmmps_ac = psta->uapsd_bk&BIT(0);
break;
case 4:
case 5:
wmmps_ac = psta->uapsd_vi&BIT(0);
break;
case 6:
case 7:
wmmps_ac = psta->uapsd_vo&BIT(0);
break;
case 0:
case 3:
default:
wmmps_ac = psta->uapsd_be&BIT(0);
break;
}
if (wmmps_ac)
return _FAIL;
if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
DBG_88E("%s alive check-rx ps-poll\n", __func__);
psta->expire_to = pstapriv->expire_to;
psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
}
if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
struct list_head *xmitframe_plist, *xmitframe_phead;
struct xmit_frame *pxmitframe = NULL;
spin_lock_bh(&psta->sleep_q.lock);
xmitframe_phead = get_list_head(&psta->sleep_q);
xmitframe_plist = xmitframe_phead->next;
if (xmitframe_phead != xmitframe_plist) {
pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
xmitframe_plist = xmitframe_plist->next;
list_del_init(&pxmitframe->list);
psta->sleepq_len--;
if (psta->sleepq_len > 0)
pxmitframe->attrib.mdata = 1;
else
pxmitframe->attrib.mdata = 0;
pxmitframe->attrib.triggered = 1;
spin_unlock_bh(&psta->sleep_q.lock);
if (rtw_hal_xmit(padapter, pxmitframe) == true)
rtw_os_xmit_complete(padapter, pxmitframe);
spin_lock_bh(&psta->sleep_q.lock);
if (psta->sleepq_len == 0) {
pstapriv->tim_bitmap &= ~BIT(psta->aid);
/* update BCN for TIM IE */
/* update_BCNTIM(padapter); */
update_beacon(padapter, _TIM_IE_, NULL, false);
}
} else {
if (pstapriv->tim_bitmap&BIT(psta->aid)) {
if (psta->sleepq_len == 0) {
DBG_88E("no buffered packets to xmit\n");
/* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
} else {
DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
psta->sleepq_len = 0;
}
pstapriv->tim_bitmap &= ~BIT(psta->aid);
/* update BCN for TIM IE */
/* update_BCNTIM(padapter); */
update_beacon(padapter, _TIM_IE_, NULL, false);
}
}
spin_unlock_bh(&psta->sleep_q.lock);
}
}
#endif
return _FAIL;
}
struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
struct recv_frame *precv_frame);
static int validate_recv_mgnt_frame(struct adapter *padapter,
struct recv_frame *precv_frame)
{
struct sta_info *psta;
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
precv_frame = recvframe_chk_defrag(padapter, precv_frame);
if (precv_frame == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
return _SUCCESS;
}
/* for rx pkt statistics */
psta = rtw_get_stainfo(&padapter->stapriv,
GetAddr2Ptr(precv_frame->rx_data));
if (psta) {
psta->sta_stats.rx_mgnt_pkts++;
if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
psta->sta_stats.rx_beacon_pkts++;
} else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
psta->sta_stats.rx_probereq_pkts++;
} else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
if (!memcmp(padapter->eeprompriv.mac_addr,
GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
psta->sta_stats.rx_probersp_pkts++;
else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
psta->sta_stats.rx_probersp_bm_pkts++;
else
psta->sta_stats.rx_probersp_uo_pkts++;
}
}
mgt_dispatcher(padapter, precv_frame);
return _SUCCESS;
}
static int validate_recv_data_frame(struct adapter *adapter,
struct recv_frame *precv_frame)
{
u8 bretry;
u8 *psa, *pda, *pbssid;
struct sta_info *psta = NULL;
u8 *ptr = precv_frame->rx_data;
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
struct security_priv *psecuritypriv = &adapter->securitypriv;
int ret = _SUCCESS;
bretry = GetRetry(ptr);
pda = get_da(ptr);
psa = get_sa(ptr);
pbssid = get_hdr_bssid(ptr);
if (pbssid == NULL) {
ret = _FAIL;
goto exit;
}
memcpy(pattrib->dst, pda, ETH_ALEN);
memcpy(pattrib->src, psa, ETH_ALEN);
memcpy(pattrib->bssid, pbssid, ETH_ALEN);
switch (pattrib->to_fr_ds) {
case 0:
memcpy(pattrib->ra, pda, ETH_ALEN);
memcpy(pattrib->ta, psa, ETH_ALEN);
ret = sta2sta_data_frame(adapter, precv_frame, &psta);
break;
case 1:
memcpy(pattrib->ra, pda, ETH_ALEN);
memcpy(pattrib->ta, pbssid, ETH_ALEN);
ret = ap2sta_data_frame(adapter, precv_frame, &psta);
break;
case 2:
memcpy(pattrib->ra, pbssid, ETH_ALEN);
memcpy(pattrib->ta, psa, ETH_ALEN);
ret = sta2ap_data_frame(adapter, precv_frame, &psta);
break;
case 3:
memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
ret = _FAIL;
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
break;
default:
ret = _FAIL;
break;
}
if (ret == _FAIL) {
goto exit;
} else if (ret == RTW_RX_HANDLED) {
goto exit;
}
if (psta == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
ret = _FAIL;
goto exit;
}
/* psta->rssi = prxcmd->rssi; */
/* psta->signal_quality = prxcmd->sq; */
precv_frame->psta = psta;
pattrib->amsdu = 0;
pattrib->ack_policy = 0;
/* parsing QC field */
if (pattrib->qos == 1) {
pattrib->priority = GetPriority((ptr + 24));
pattrib->ack_policy = GetAckpolicy((ptr + 24));
pattrib->amsdu = GetAMsdu((ptr + 24));
pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
if (pattrib->priority != 0 && pattrib->priority != 3)
adapter->recvpriv.bIsAnyNonBEPkts = true;
} else {
pattrib->priority = 0;
pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
}
if (pattrib->order)/* HT-CTRL 11n */
pattrib->hdrlen += 4;
precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
/* decache, drop duplicate recv packets */
if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
ret = _FAIL;
goto exit;
}
if (pattrib->privacy) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n ^^^^^^^^^^^IS_MCAST(pattrib->ra(0x%02x))=%d^^^^^^^^^^^^^^^6\n", pattrib->ra[0], IS_MCAST(pattrib->ra)));
GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
} else {
pattrib->encrypt = 0;
pattrib->iv_len = 0;
pattrib->icv_len = 0;
}
exit:
return ret;
}
static int validate_recv_frame(struct adapter *adapter,
struct recv_frame *precv_frame)
{
/* shall check frame subtype, to / from ds, da, bssid */
/* then call check if rx seq/frag. duplicated. */
u8 type;
u8 subtype;
int retval = _SUCCESS;
u8 bDumpRxPkt;
struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
u8 *ptr = precv_frame->rx_data;
u8 ver = (unsigned char)(*ptr)&0x3;
struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
if (ch_set_idx >= 0)
pmlmeext->channel_set[ch_set_idx].rx_count++;
}
/* add version chk */
if (ver != 0) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
retval = _FAIL;
goto exit;
}
type = GetFrameType(ptr);
subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
pattrib->to_fr_ds = get_tofr_ds(ptr);
pattrib->frag_num = GetFragNum(ptr);
pattrib->seq_num = GetSequence(ptr);
pattrib->pw_save = GetPwrMgt(ptr);
pattrib->mfrag = GetMFrag(ptr);
pattrib->mdata = GetMData(ptr);
pattrib->privacy = GetPrivacy(ptr);
pattrib->order = GetOrder(ptr);
/* Dump rx packets */
rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
if (bDumpRxPkt == 1) {/* dump all rx packets */
int i;
DBG_88E("#############################\n");
for (i = 0; i < 64; i += 8)
DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
*(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
DBG_88E("#############################\n");
} else if (bDumpRxPkt == 2) {
if (type == WIFI_MGT_TYPE) {
int i;
DBG_88E("#############################\n");
for (i = 0; i < 64; i += 8)
DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
*(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
DBG_88E("#############################\n");
}
} else if (bDumpRxPkt == 3) {
if (type == WIFI_DATA_TYPE) {
int i;
DBG_88E("#############################\n");
for (i = 0; i < 64; i += 8)
DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
*(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
DBG_88E("#############################\n");
}
}
switch (type) {
case WIFI_MGT_TYPE: /* mgnt */
retval = validate_recv_mgnt_frame(adapter, precv_frame);
if (retval == _FAIL)
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
retval = _FAIL; /* only data frame return _SUCCESS */
break;
case WIFI_CTRL_TYPE: /* ctrl */
retval = validate_recv_ctrl_frame(adapter, precv_frame);
if (retval == _FAIL)
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
retval = _FAIL; /* only data frame return _SUCCESS */
break;
case WIFI_DATA_TYPE: /* data */
rtw_led_control(adapter, LED_CTL_RX);
pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
retval = validate_recv_data_frame(adapter, precv_frame);
if (retval == _FAIL) {
struct recv_priv *precvpriv = &adapter->recvpriv;
precvpriv->rx_drop++;
}
break;
default:
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
retval = _FAIL;
break;
}
/*
* This is the last moment before management and control frames get
* discarded. So we need to forward them to the monitor now or never.
*
* At the same time data frames can still be encrypted if software
* decryption is in use. However, decryption can occur not until later
* (see recv_func()).
*
* Hence forward the frame to the monitor anyway to preserve the order
* in which frames were received.
*/
rtl88eu_mon_recv_hook(adapter->pmondev, precv_frame);
exit:
return retval;
}
/* remove the wlanhdr and add the eth_hdr */
static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
{
int rmv_len;
u16 eth_type, len;
__be16 be_tmp;
u8 bsnaphdr;
u8 *psnap_type;
struct ieee80211_snap_hdr *psnap;
struct adapter *adapter = precvframe->adapter;
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
u8 *ptr = precvframe->rx_data;
struct rx_pkt_attrib *pattrib = &precvframe->attrib;
if (pattrib->encrypt)
recvframe_pull_tail(precvframe, pattrib->icv_len);
psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
/* convert hdr + possible LLC headers into Ethernet header */
if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
(!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
(!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
!memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
/* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
bsnaphdr = true;
} else {
/* Leave Ethernet header part of hdr and full payload */
bsnaphdr = false;
}
rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
len = precvframe->len - rmv_len;
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
("\n===pattrib->hdrlen: %x, pattrib->iv_len:%x===\n\n", pattrib->hdrlen, pattrib->iv_len));
memcpy(&be_tmp, ptr+rmv_len, 2);
eth_type = ntohs(be_tmp); /* pattrib->ether_type */
pattrib->eth_type = eth_type;
if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
ptr += rmv_len;
*ptr = 0x87;
*(ptr+1) = 0x12;
eth_type = 0x8712;
/* append rx status for mp test packets */
ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
memcpy(ptr, get_rxmem(precvframe), 24);
ptr += 24;
} else {
ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
}
memcpy(ptr, pattrib->dst, ETH_ALEN);
memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
if (!bsnaphdr) {
be_tmp = htons(len);
memcpy(ptr+12, &be_tmp, 2);
}
return _SUCCESS;
}
/* perform defrag */
static struct recv_frame *recvframe_defrag(struct adapter *adapter,
struct __queue *defrag_q)
{
struct list_head *plist, *phead;
u8 wlanhdr_offset;
u8 curfragnum;
struct recv_frame *pfhdr, *pnfhdr;
struct recv_frame *prframe, *pnextrframe;
struct __queue *pfree_recv_queue;
curfragnum = 0;
pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
phead = get_list_head(defrag_q);
plist = phead->next;
pfhdr = container_of(plist, struct recv_frame, list);
prframe = (struct recv_frame *)pfhdr;
list_del_init(&(prframe->list));
if (curfragnum != pfhdr->attrib.frag_num) {
/* the first fragment number must be 0 */
/* free the whole queue */
rtw_free_recvframe(prframe, pfree_recv_queue);
rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
return NULL;
}
curfragnum++;
plist = get_list_head(defrag_q);
plist = plist->next;
while (phead != plist) {
pnfhdr = container_of(plist, struct recv_frame, list);
pnextrframe = (struct recv_frame *)pnfhdr;
/* check the fragment sequence (2nd ~n fragment frame) */
if (curfragnum != pnfhdr->attrib.frag_num) {
/* the fragment number must be increasing (after decache) */
/* release the defrag_q & prframe */
rtw_free_recvframe(prframe, pfree_recv_queue);
rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
return NULL;
}
curfragnum++;
/* copy the 2nd~n fragment frame's payload to the first fragment */
/* get the 2nd~last fragment frame's payload */
wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
recvframe_pull(pnextrframe, wlanhdr_offset);
/* append to first fragment frame's tail (if privacy frame, pull the ICV) */
recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
/* memcpy */
memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
recvframe_put(prframe, pnfhdr->len);
pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
plist = plist->next;
}
/* free the defrag_q queue and return the prframe */
rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
return prframe;
}
/* check if need to defrag, if needed queue the frame to defrag_q */
struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
struct recv_frame *precv_frame)
{
u8 ismfrag;
u8 fragnum;
u8 *psta_addr;
struct recv_frame *pfhdr;
struct sta_info *psta;
struct sta_priv *pstapriv;
struct list_head *phead;
struct recv_frame *prtnframe = NULL;
struct __queue *pfree_recv_queue, *pdefrag_q;
pstapriv = &padapter->stapriv;
pfhdr = precv_frame;
pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
/* need to define struct of wlan header frame ctrl */
ismfrag = pfhdr->attrib.mfrag;
fragnum = pfhdr->attrib.frag_num;
psta_addr = pfhdr->attrib.ta;
psta = rtw_get_stainfo(pstapriv, psta_addr);
if (psta == NULL) {
u8 type = GetFrameType(pfhdr->rx_data);
if (type != WIFI_DATA_TYPE) {
psta = rtw_get_bcmc_stainfo(padapter);
pdefrag_q = &psta->sta_recvpriv.defrag_q;
} else {
pdefrag_q = NULL;
}
} else {
pdefrag_q = &psta->sta_recvpriv.defrag_q;
}
if ((ismfrag == 0) && (fragnum == 0))
prtnframe = precv_frame;/* isn't a fragment frame */
if (ismfrag == 1) {
/* 0~(n-1) fragment frame */
/* enqueue to defraf_g */
if (pdefrag_q != NULL) {
if (fragnum == 0) {
/* the first fragment */
if (!list_empty(&pdefrag_q->queue)) {
/* free current defrag_q */
rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
}
}
/* Then enqueue the 0~(n-1) fragment into the defrag_q */
phead = get_list_head(pdefrag_q);
list_add_tail(&pfhdr->list, phead);
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
prtnframe = NULL;
} else {
/* can't find this ta's defrag_queue, so free this recv_frame */
rtw_free_recvframe(precv_frame, pfree_recv_queue);
prtnframe = NULL;
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
}
}
if ((ismfrag == 0) && (fragnum != 0)) {
/* the last fragment frame */
/* enqueue the last fragment */
if (pdefrag_q != NULL) {
phead = get_list_head(pdefrag_q);
list_add_tail(&pfhdr->list, phead);
/* call recvframe_defrag to defrag */
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
precv_frame = recvframe_defrag(padapter, pdefrag_q);
prtnframe = precv_frame;
} else {
/* can't find this ta's defrag_queue, so free this recv_frame */
rtw_free_recvframe(precv_frame, pfree_recv_queue);
prtnframe = NULL;
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
}
}
if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
/* after defrag we must check tkip mic code */
if (recvframe_chkmic(padapter, prtnframe) == _FAIL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter, prtnframe)==_FAIL\n"));
rtw_free_recvframe(prtnframe, pfree_recv_queue);
prtnframe = NULL;
}
}
return prtnframe;
}
static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
{
int a_len, padding_len;
u16 eth_type, nSubframe_Length;
u8 nr_subframes, i;
unsigned char *pdata;
struct rx_pkt_attrib *pattrib;
unsigned char *data_ptr;
struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
struct recv_priv *precvpriv = &padapter->recvpriv;
struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
nr_subframes = 0;
pattrib = &prframe->attrib;
recvframe_pull(prframe, prframe->attrib.hdrlen);
if (prframe->attrib.iv_len > 0)
recvframe_pull(prframe, prframe->attrib.iv_len);
a_len = prframe->len;
pdata = prframe->rx_data;
while (a_len > ETH_HLEN) {
/* Offset 12 denote 2 mac address */
nSubframe_Length = get_unaligned_be16(pdata + 12);
if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
goto exit;
}
/* move the data point to data content */
pdata += ETH_HLEN;
a_len -= ETH_HLEN;
/* Allocate new skb for releasing to upper layer */
sub_skb = dev_alloc_skb(nSubframe_Length + 12);
if (sub_skb) {
skb_reserve(sub_skb, 12);
data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
memcpy(data_ptr, pdata, nSubframe_Length);
} else {
sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
if (sub_skb) {
sub_skb->data = pdata;
sub_skb->len = nSubframe_Length;
skb_set_tail_pointer(sub_skb, nSubframe_Length);
} else {
DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
break;
}
}
subframes[nr_subframes++] = sub_skb;
if (nr_subframes >= MAX_SUBFRAME_COUNT) {
DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
break;
}
pdata += nSubframe_Length;
a_len -= nSubframe_Length;
if (a_len != 0) {
padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
if (padding_len == 4) {
padding_len = 0;
}
if (a_len < padding_len) {
goto exit;
}
pdata += padding_len;
a_len -= padding_len;
}
}
for (i = 0; i < nr_subframes; i++) {
sub_skb = subframes[i];
/* convert hdr + possible LLC headers into Ethernet header */
eth_type = get_unaligned_be16(&sub_skb->data[6]);
if (sub_skb->len >= 8 &&
((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
!memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
/* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
skb_pull(sub_skb, SNAP_SIZE);
memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
} else {
__be16 len;
/* Leave Ethernet header part of hdr and full payload */
len = htons(sub_skb->len);
memcpy(skb_push(sub_skb, 2), &len, 2);
memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
}
/* Indicate the packets to upper layer */
/* Insert NAT2.5 RX here! */
sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
sub_skb->dev = padapter->pnetdev;
sub_skb->ip_summed = CHECKSUM_NONE;
netif_rx(sub_skb);
}
exit:
prframe->len = 0;
rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
return _SUCCESS;
}
static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
{
u8 wsize = preorder_ctrl->wsize_b;
u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/* 4096; */
/* Rx Reorder initialize condition. */
if (preorder_ctrl->indicate_seq == 0xFFFF)
preorder_ctrl->indicate_seq = seq_num;
/* Drop out the packet which SeqNum is smaller than WinStart */
if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
return false;
/* */
/* Sliding window manipulation. Conditions includes: */
/* 1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
/* 2. Incoming SeqNum is larger than the WinEnd => Window shift N */
/* */
if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
} else if (SN_LESS(wend, seq_num)) {
if (seq_num >= (wsize - 1))
preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
else
preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
}
return true;
}
static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
struct recv_frame *prframe)
{
struct rx_pkt_attrib *pattrib = &prframe->attrib;
struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
struct list_head *phead, *plist;
struct recv_frame *hdr;
struct rx_pkt_attrib *pnextattrib;
phead = get_list_head(ppending_recvframe_queue);
plist = phead->next;
while (phead != plist) {
hdr = container_of(plist, struct recv_frame, list);
pnextattrib = &hdr->attrib;
if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
plist = plist->next;
else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
return false;
else
break;
}
list_del_init(&(prframe->list));
list_add_tail(&(prframe->list), plist);
return true;
}
static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
{
struct list_head *phead, *plist;
struct recv_frame *prframe;
struct recv_frame *prhdr;
struct rx_pkt_attrib *pattrib;
int bPktInBuf = false;
struct recv_priv *precvpriv = &padapter->recvpriv;
struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
phead = get_list_head(ppending_recvframe_queue);
plist = phead->next;
/* Handling some condition for forced indicate case. */
if (bforced) {
if (list_empty(phead))
return true;
prhdr = container_of(plist, struct recv_frame, list);
pattrib = &prhdr->attrib;
preorder_ctrl->indicate_seq = pattrib->seq_num;
}
/* Prepare indication list and indication. */
/* Check if there is any packet need indicate. */
while (!list_empty(phead)) {
prhdr = container_of(plist, struct recv_frame, list);
prframe = (struct recv_frame *)prhdr;
pattrib = &prframe->attrib;
if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
plist = plist->next;
list_del_init(&(prframe->list));
if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
/* Set this as a lock to make sure that only one thread is indicating packet. */
/* indicate this recv_frame */
if (!pattrib->amsdu) {
if ((!padapter->bDriverStopped) &&
(!padapter->bSurpriseRemoved))
rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
} else if (pattrib->amsdu == 1) {
if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
} else {
/* error condition; */
}
/* Update local variables. */
bPktInBuf = false;
} else {
bPktInBuf = true;
break;
}
}
return bPktInBuf;
}
static int recv_indicatepkt_reorder(struct adapter *padapter,
struct recv_frame *prframe)
{
int retval = _SUCCESS;
struct rx_pkt_attrib *pattrib = &prframe->attrib;
struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
if (!pattrib->amsdu) {
/* s1. */
wlanhdr_to_ethhdr(prframe);
if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
(pattrib->ack_policy != 0)) {
if ((!padapter->bDriverStopped) &&
(!padapter->bSurpriseRemoved)) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
rtw_recv_indicatepkt(padapter, prframe);
return _SUCCESS;
}
return _FAIL;
}
if (!preorder_ctrl->enable) {
/* indicate this recv_frame */
preorder_ctrl->indicate_seq = pattrib->seq_num;
rtw_recv_indicatepkt(padapter, prframe);
preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
return _SUCCESS;
}
} else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
if (!preorder_ctrl->enable) {
preorder_ctrl->indicate_seq = pattrib->seq_num;
retval = amsdu_to_msdu(padapter, prframe);
preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
return retval;
}
}
spin_lock_bh(&ppending_recvframe_queue->lock);
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
preorder_ctrl->indicate_seq, pattrib->seq_num));
/* s2. check if winstart_b(indicate_seq) needs to been updated */
if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
rtw_recv_indicatepkt(padapter, prframe);
spin_unlock_bh(&ppending_recvframe_queue->lock);
goto _success_exit;
}
/* s3. Insert all packet into Reorder Queue to maintain its ordering. */
if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
goto _err_exit;
/* s4. */
/* Indication process. */
/* After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
/* with the SeqNum smaller than latest WinStart and buffer other packets. */
/* */
/* For Rx Reorder condition: */
/* 1. All packets with SeqNum smaller than WinStart => Indicate */
/* 2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
/* */
/* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
mod_timer(&preorder_ctrl->reordering_ctrl_timer,
jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
spin_unlock_bh(&ppending_recvframe_queue->lock);
} else {
spin_unlock_bh(&ppending_recvframe_queue->lock);
del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
}
_success_exit:
return _SUCCESS;
_err_exit:
spin_unlock_bh(&ppending_recvframe_queue->lock);
return _FAIL;
}
void rtw_reordering_ctrl_timeout_handler(unsigned long data)
{
struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)data;
struct adapter *padapter = preorder_ctrl->padapter;
struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
return;
spin_lock_bh(&ppending_recvframe_queue->lock);
if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
mod_timer(&preorder_ctrl->reordering_ctrl_timer,
jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
spin_unlock_bh(&ppending_recvframe_queue->lock);
}
static int process_recv_indicatepkts(struct adapter *padapter,
struct recv_frame *prframe)
{
int retval = _SUCCESS;
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
struct ht_priv *phtpriv = &pmlmepriv->htpriv;
if (phtpriv->ht_option) { /* B/G/N Mode */
if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
/* including perform A-MPDU Rx Ordering Buffer Control */
if ((!padapter->bDriverStopped) &&
(!padapter->bSurpriseRemoved)) {
retval = _FAIL;
return retval;
}
}
} else { /* B/G mode */
retval = wlanhdr_to_ethhdr(prframe);
if (retval != _SUCCESS) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
return retval;
}
if ((!padapter->bDriverStopped) &&
(!padapter->bSurpriseRemoved)) {
/* indicate this recv_frame */
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
rtw_recv_indicatepkt(padapter, prframe);
} else {
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
retval = _FAIL;
return retval;
}
}
return retval;
}
static int recv_func_prehandle(struct adapter *padapter,
struct recv_frame *rframe)
{
int ret = _SUCCESS;
struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
/* check the frame crtl field and decache */
ret = validate_recv_frame(padapter, rframe);
if (ret != _SUCCESS) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
goto exit;
}
exit:
return ret;
}
static int recv_func_posthandle(struct adapter *padapter,
struct recv_frame *prframe)
{
int ret = _SUCCESS;
struct recv_frame *orig_prframe = prframe;
struct recv_priv *precvpriv = &padapter->recvpriv;
struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
/* DATA FRAME */
rtw_led_control(padapter, LED_CTL_RX);
prframe = decryptor(padapter, prframe);
if (prframe == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
ret = _FAIL;
goto _recv_data_drop;
}
prframe = recvframe_chk_defrag(padapter, prframe);
if (prframe == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
goto _recv_data_drop;
}
prframe = portctrl(padapter, prframe);
if (prframe == NULL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
ret = _FAIL;
goto _recv_data_drop;
}
count_rx_stats(padapter, prframe, NULL);
ret = process_recv_indicatepkts(padapter, prframe);
if (ret != _SUCCESS) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
goto _recv_data_drop;
}
return ret;
_recv_data_drop:
precvpriv->rx_drop++;
return ret;
}
static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
{
int ret;
struct rx_pkt_attrib *prxattrib = &rframe->attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct mlme_priv *mlmepriv = &padapter->mlmepriv;
/* check if need to handle uc_swdec_pending_queue*/
if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
struct recv_frame *pending_frame;
while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
}
}
ret = recv_func_prehandle(padapter, rframe);
if (ret == _SUCCESS) {
/* check if need to enqueue into uc_swdec_pending_queue*/
if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
!IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
(prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
!is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
!psecuritypriv->busetkipkey) {
rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
goto exit;
}
ret = recv_func_posthandle(padapter, rframe);
}
exit:
return ret;
}
s32 rtw_recv_entry(struct recv_frame *precvframe)
{
struct adapter *padapter;
struct recv_priv *precvpriv;
s32 ret = _SUCCESS;
padapter = precvframe->adapter;
precvpriv = &padapter->recvpriv;
ret = recv_func(padapter, precvframe);
if (ret == _FAIL) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
goto _recv_entry_drop;
}
precvpriv->rx_pkts++;
return ret;
_recv_entry_drop:
return ret;
}
void rtw_signal_stat_timer_hdl(unsigned long data)
{
struct adapter *adapter = (struct adapter *)data;
struct recv_priv *recvpriv = &adapter->recvpriv;
u32 tmp_s, tmp_q;
u8 avg_signal_strength = 0;
u8 avg_signal_qual = 0;
u8 _alpha = 3; /* this value is based on converging_constant = 5000 and sampling_interval = 1000 */
if (adapter->recvpriv.is_signal_dbg) {
/* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
} else {
if (recvpriv->signal_strength_data.update_req == 0) {/* update_req is clear, means we got rx */
avg_signal_strength = recvpriv->signal_strength_data.avg_val;
/* after avg_vals are acquired, we can re-stat the signal values */
recvpriv->signal_strength_data.update_req = 1;
}
if (recvpriv->signal_qual_data.update_req == 0) {/* update_req is clear, means we got rx */
avg_signal_qual = recvpriv->signal_qual_data.avg_val;
/* after avg_vals are acquired, we can re-stat the signal values */
recvpriv->signal_qual_data.update_req = 1;
}
/* update value of signal_strength, rssi, signal_qual */
if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
tmp_s = avg_signal_strength+(_alpha-1)*recvpriv->signal_strength;
if (tmp_s % _alpha)
tmp_s = tmp_s/_alpha + 1;
else
tmp_s = tmp_s/_alpha;
if (tmp_s > 100)
tmp_s = 100;
tmp_q = avg_signal_qual+(_alpha-1)*recvpriv->signal_qual;
if (tmp_q % _alpha)
tmp_q = tmp_q/_alpha + 1;
else
tmp_q = tmp_q/_alpha;
if (tmp_q > 100)
tmp_q = 100;
recvpriv->signal_strength = tmp_s;
recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
recvpriv->signal_qual = tmp_q;
}
}
rtw_set_signal_stat_timer(recvpriv);
}