// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
*
* Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
*
******************************************************************************/
#include <drv_types.h>
#include <linux/jiffies.h>
#include <rtw_recv.h>
#include <net/cfg80211.h>
#include <linux/unaligned.h>
static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
static void rtw_signal_stat_timer_hdl(struct timer_list *t);
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);
/* for (i = 0; i<MAX_RX_NUMBLKS; i++) */
/* _rtw_init_queue(&psta_recvpriv->blk_strms[i]); */
INIT_LIST_HEAD(&psta_recvpriv->defrag_q.queue);
spin_lock_init(&psta_recvpriv->defrag_q.lock);
}
signed int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
{
signed int i;
union recv_frame *precvframe;
signed int res = _SUCCESS;
spin_lock_init(&precvpriv->lock);
INIT_LIST_HEAD(&precvpriv->free_recv_queue.queue);
spin_lock_init(&precvpriv->free_recv_queue.lock);
INIT_LIST_HEAD(&precvpriv->recv_pending_queue.queue);
spin_lock_init(&precvpriv->recv_pending_queue.lock);
INIT_LIST_HEAD(&precvpriv->uc_swdec_pending_queue.queue);
spin_lock_init(&precvpriv->uc_swdec_pending_queue.lock);
precvpriv->adapter = padapter;
precvpriv->free_recvframe_cnt = NR_RECVFRAME;
precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(union recv_frame) + RXFRAME_ALIGN_SZ);
if (!precvpriv->pallocated_frame_buf) {
res = _FAIL;
goto exit;
}
precvpriv->precv_frame_buf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ);
/* precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf + RXFRAME_ALIGN_SZ - */
/* ((SIZE_PTR) (precvpriv->pallocated_frame_buf) &(RXFRAME_ALIGN_SZ-1)); */
precvframe = (union recv_frame *) precvpriv->precv_frame_buf;
for (i = 0; i < NR_RECVFRAME; i++) {
INIT_LIST_HEAD(&(precvframe->u.list));
list_add_tail(&(precvframe->u.list), &(precvpriv->free_recv_queue.queue));
rtw_os_recv_resource_alloc(padapter, precvframe);
precvframe->u.hdr.len = 0;
precvframe->u.hdr.adapter = padapter;
precvframe++;
}
res = rtw_hal_init_recv_priv(padapter);
timer_setup(&precvpriv->signal_stat_timer, rtw_signal_stat_timer_hdl,
0);
precvpriv->signal_stat_sampling_interval = 2000; /* ms */
rtw_set_signal_stat_timer(precvpriv);
exit:
return res;
}
void _rtw_free_recv_priv(struct recv_priv *precvpriv)
{
struct adapter *padapter = precvpriv->adapter;
rtw_free_uc_swdec_pending_queue(padapter);
rtw_os_recv_resource_free(precvpriv);
vfree(precvpriv->pallocated_frame_buf);
rtw_hal_free_recv_priv(padapter);
}
union recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
{
union recv_frame *precvframe;
struct list_head *plist, *phead;
struct adapter *padapter;
struct recv_priv *precvpriv;
if (list_empty(&pfree_recv_queue->queue))
precvframe = NULL;
else {
phead = get_list_head(pfree_recv_queue);
plist = get_next(phead);
precvframe = (union recv_frame *)plist;
list_del_init(&precvframe->u.hdr.list);
padapter = precvframe->u.hdr.adapter;
if (padapter) {
precvpriv = &padapter->recvpriv;
if (pfree_recv_queue == &precvpriv->free_recv_queue)
precvpriv->free_recvframe_cnt--;
}
}
return precvframe;
}
union recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
{
union 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(union recv_frame *precvframe, struct __queue *pfree_recv_queue)
{
struct adapter *padapter = precvframe->u.hdr.adapter;
struct recv_priv *precvpriv = &padapter->recvpriv;
rtw_os_free_recvframe(precvframe);
spin_lock_bh(&pfree_recv_queue->lock);
list_del_init(&(precvframe->u.hdr.list));
precvframe->u.hdr.len = 0;
list_add_tail(&(precvframe->u.hdr.list), get_list_head(pfree_recv_queue));
if (padapter) {
if (pfree_recv_queue == &precvpriv->free_recv_queue)
precvpriv->free_recvframe_cnt++;
}
spin_unlock_bh(&pfree_recv_queue->lock);
return _SUCCESS;
}
signed int _rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue)
{
struct adapter *padapter = precvframe->u.hdr.adapter;
struct recv_priv *precvpriv = &padapter->recvpriv;
/* INIT_LIST_HEAD(&(precvframe->u.hdr.list)); */
list_del_init(&(precvframe->u.hdr.list));
list_add_tail(&(precvframe->u.hdr.list), get_list_head(queue));
if (padapter)
if (queue == &precvpriv->free_recv_queue)
precvpriv->free_recvframe_cnt++;
return _SUCCESS;
}
signed int rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue)
{
signed int ret;
/* _spinlock(&pfree_recv_queue->lock); */
spin_lock_bh(&queue->lock);
ret = _rtw_enqueue_recvframe(precvframe, queue);
/* spin_unlock(&pfree_recv_queue->lock); */
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)
{
union recv_frame *precvframe;
struct list_head *plist, *phead;
spin_lock(&pframequeue->lock);
phead = get_list_head(pframequeue);
plist = get_next(phead);
while (phead != plist) {
precvframe = (union recv_frame *)plist;
plist = get_next(plist);
rtw_free_recvframe(precvframe, pfree_recv_queue);
}
spin_unlock(&pframequeue->lock);
}
u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
{
u32 cnt = 0;
union 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);
cnt++;
}
return cnt;
}
signed int rtw_enqueue_recvbuf_to_head(struct recv_buf *precvbuf, struct __queue *queue)
{
spin_lock_bh(&queue->lock);
list_del_init(&precvbuf->list);
list_add(&precvbuf->list, get_list_head(queue));
spin_unlock_bh(&queue->lock);
return _SUCCESS;
}
signed int rtw_enqueue_recvbuf(struct recv_buf *precvbuf, struct __queue *queue)
{
spin_lock_bh(&queue->lock);
list_del_init(&precvbuf->list);
list_add_tail(&precvbuf->list, get_list_head(queue));
spin_unlock_bh(&queue->lock);
return _SUCCESS;
}
struct recv_buf *rtw_dequeue_recvbuf(struct __queue *queue)
{
struct recv_buf *precvbuf;
struct list_head *plist, *phead;
spin_lock_bh(&queue->lock);
if (list_empty(&queue->queue))
precvbuf = NULL;
else {
phead = get_list_head(queue);
plist = get_next(phead);
precvbuf = container_of(plist, struct recv_buf, list);
list_del_init(&precvbuf->list);
}
spin_unlock_bh(&queue->lock);
return precvbuf;
}
static signed int recvframe_chkmic(struct adapter *adapter, union recv_frame *precvframe)
{
signed int i, res = _SUCCESS;
u32 datalen;
u8 miccode[8];
u8 bmic_err = false, brpt_micerror = true;
u8 *pframe, *payload, *pframemic;
u8 *mickey;
/* u8 *iv, rxdata_key_idx = 0; */
struct sta_info *stainfo;
struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.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_) {
/* calculate mic code */
if (stainfo) {
if (is_multicast_ether_addr(prxattrib->ra)) {
/* mickey =&psecuritypriv->dot118021XGrprxmickey.skey[0]; */
/* iv = precvframe->u.hdr.rx_data+prxattrib->hdrlen; */
/* rxdata_key_idx =(((iv[3])>>6)&0x3) ; */
mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
/* psecuritypriv->dot118021XGrpKeyid, pmlmeinfo->key_index, rxdata_key_idx); */
if (psecuritypriv->binstallGrpkey == false) {
res = _FAIL;
goto exit;
}
} else {
mickey = &stainfo->dot11tkiprxmickey.skey[0];
}
datalen = precvframe->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len-prxattrib->icv_len-8;/* icv_len included the mic code */
pframe = precvframe->u.hdr.rx_data;
payload = pframe+prxattrib->hdrlen+prxattrib->iv_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))
bmic_err = true;
}
if (bmic_err == true) {
/* double check key_index for some timing issue , */
/* cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
if ((is_multicast_ether_addr(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_multicast_ether_addr(prxattrib->ra));
res = _FAIL;
} else {
/* mic checked ok */
if (!psecuritypriv->bcheck_grpkey &&
is_multicast_ether_addr(prxattrib->ra))
psecuritypriv->bcheck_grpkey = true;
}
}
recvframe_pull_tail(precvframe, 8);
}
exit:
return res;
}
/* decrypt and set the ivlen, icvlen of the recv_frame */
static union recv_frame *decryptor(struct adapter *padapter, union recv_frame *precv_frame)
{
struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
union recv_frame *return_packet = precv_frame;
u32 res = _SUCCESS;
if (prxattrib->encrypt > 0) {
u8 *iv = precv_frame->u.hdr.rx_data+prxattrib->hdrlen;
prxattrib->key_index = (((iv[3])>>6)&0x3);
if (prxattrib->key_index > WEP_KEYS) {
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 == true))) {
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;
} else {
}
if (res == _FAIL) {
rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
return_packet = NULL;
} else
prxattrib->bdecrypted = true;
return return_packet;
}
/* set the security information in the recv_frame */
static union recv_frame *portctrl(struct adapter *adapter, union recv_frame *precv_frame)
{
u8 *psta_addr = NULL;
u8 *ptr;
uint auth_alg;
struct recv_frame_hdr *pfhdr;
struct sta_info *psta;
struct sta_priv *pstapriv;
union recv_frame *prtnframe;
u16 ether_type = 0;
u16 eapol_type = 0x888e;/* for Funia BD's WPA issue */
struct rx_pkt_attrib *pattrib;
pstapriv = &adapter->stapriv;
auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
ptr = precv_frame->u.hdr.rx_data;
pfhdr = &precv_frame->u.hdr;
pattrib = &pfhdr->attrib;
psta_addr = pattrib->ta;
prtnframe = NULL;
psta = rtw_get_stainfo(pstapriv, psta_addr);
if (auth_alg == 2) {
if ((psta) && (psta->ieee8021x_blocked)) {
__be16 be_tmp;
/* blocked */
/* only accept EAPOL frame */
prtnframe = precv_frame;
/* get ether_type */
ptr = ptr + pfhdr->attrib.hdrlen + pfhdr->attrib.iv_len + LLC_HEADER_LENGTH;
memcpy(&be_tmp, ptr, 2);
ether_type = ntohs(be_tmp);
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 */
prtnframe = precv_frame;
/* check is the EAPOL frame or not (Rekey) */
/* if (ether_type == eapol_type) { */
/* check Rekey */
/* prtnframe =precv_frame; */
/* */
/* else { */
/* */
}
} else
prtnframe = precv_frame;
return prtnframe;
}
static signed int recv_decache(union recv_frame *precv_frame, u8 bretry, struct stainfo_rxcache *prxcache)
{
signed int tid = precv_frame->u.hdr.attrib.priority;
u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num&0xffff) << 4) |
(precv_frame->u.hdr.attrib.frag_num & 0xf);
if (tid > 15)
return _FAIL;
if (1) { /* if (bretry) */
if (seq_ctrl == prxcache->tid_rxseq[tid])
return _FAIL;
}
prxcache->tid_rxseq[tid] = seq_ctrl;
return _SUCCESS;
}
static void process_pwrbit_data(struct adapter *padapter, union recv_frame *precv_frame)
{
unsigned char pwrbit;
u8 *ptr = precv_frame->u.hdr.rx_data;
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.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)) {
/* psta->state |= WIFI_SLEEP_STATE; */
/* pstapriv->sta_dz_bitmap |= BIT(psta->aid); */
stop_sta_xmit(padapter, psta);
}
} else {
if (psta->state & WIFI_SLEEP_STATE) {
/* psta->state ^= WIFI_SLEEP_STATE; */
/* pstapriv->sta_dz_bitmap &= ~BIT(psta->aid); */
wakeup_sta_to_xmit(padapter, psta);
}
}
}
}
static void process_wmmps_data(struct adapter *padapter, union recv_frame *precv_frame)
{
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.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);
}
}
}
static void count_rx_stats(struct adapter *padapter, union 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->u.hdr.attrib;
struct recv_priv *precvpriv = &padapter->recvpriv;
sz = get_recvframe_len(prframe);
precvpriv->rx_bytes += sz;
padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
if ((!is_broadcast_ether_addr(pattrib->dst)) && (!is_multicast_ether_addr(pattrib->dst)))
padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
if (sta)
psta = sta;
else
psta = prframe->u.hdr.psta;
if (psta) {
pstats = &psta->sta_stats;
pstats->rx_data_pkts++;
pstats->rx_bytes += sz;
}
traffic_check_for_leave_lps(padapter, false, 0);
}
static signed int sta2sta_data_frame(struct adapter *adapter, union recv_frame *precv_frame,
struct sta_info **psta)
{
u8 *ptr = precv_frame->u.hdr.rx_data;
signed int ret = _SUCCESS;
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.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;
signed int bmcast = is_multicast_ether_addr(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)) {
ret = _FAIL;
goto exit;
}
if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
ret = _FAIL;
goto exit;
}
if (is_zero_ether_addr(pattrib->bssid) ||
is_zero_ether_addr(mybssid) ||
(memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
ret = _FAIL;
goto exit;
}
sta_addr = pattrib->src;
} else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) {
/* For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
ret = _FAIL;
goto exit;
}
sta_addr = pattrib->bssid;
} else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
if (bmcast) {
/* For AP mode, if DA == MCAST, then BSSID should be also MCAST */
if (!is_multicast_ether_addr(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) == 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);
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) {
ret = _FAIL;
goto exit;
}
exit:
return ret;
}
static signed int ap2sta_data_frame(struct adapter *adapter, union recv_frame *precv_frame,
struct sta_info **psta)
{
u8 *ptr = precv_frame->u.hdr.rx_data;
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
signed 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);
signed int bmcast = is_multicast_ether_addr(pattrib->dst);
if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
(check_fwstate(pmlmepriv, _FW_LINKED) == true ||
check_fwstate(pmlmepriv, _FW_UNDER_LINKING) == true)
) {
/* filter packets that SA is myself or multicast or broadcast */
if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
ret = _FAIL;
goto exit;
}
/* da should be for me */
if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
ret = _FAIL;
goto exit;
}
/* check BSSID */
if (is_zero_ether_addr(pattrib->bssid) ||
is_zero_ether_addr(mybssid) ||
(memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
if (!bmcast)
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) {
ret = _FAIL;
goto exit;
}
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) {
ret = _FAIL;
goto exit;
}
} else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
/* 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) {
/* for AP multicast issue , modify by yiwei */
static unsigned long send_issue_deauth_time;
if (jiffies_to_msecs(jiffies - send_issue_deauth_time) > 10000 || send_issue_deauth_time == 0) {
send_issue_deauth_time = jiffies;
issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
}
}
}
ret = _FAIL;
}
exit:
return ret;
}
static signed int sta2ap_data_frame(struct adapter *adapter, union recv_frame *precv_frame,
struct sta_info **psta)
{
u8 *ptr = precv_frame->u.hdr.rx_data;
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
struct sta_priv *pstapriv = &adapter->stapriv;
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
unsigned char *mybssid = get_bssid(pmlmepriv);
signed 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) {
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;
}
issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
ret = RTW_RX_HANDLED;
goto exit;
}
exit:
return ret;
}
static signed int validate_recv_ctrl_frame(struct adapter *padapter, union recv_frame *precv_frame)
{
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
struct sta_priv *pstapriv = &padapter->stapriv;
u8 *pframe = precv_frame->u.hdr.rx_data;
struct sta_info *psta = NULL;
/* uint len = precv_frame->u.hdr.len; */
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;
psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
if (!psta)
return _FAIL;
/* for rx pkt statistics */
psta->sta_stats.rx_ctrl_pkts++;
/* only handle ps-poll */
if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
u16 aid;
u8 wmmps_ac = 0;
aid = GetAid(pframe);
if (psta->aid != aid)
return _FAIL;
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) {
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;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
/* spin_lock_bh(&psta->sleep_q.lock); */
spin_lock_bh(&pxmitpriv->lock);
xmitframe_phead = get_list_head(&psta->sleep_q);
xmitframe_plist = get_next(xmitframe_phead);
if (xmitframe_phead != xmitframe_plist) {
pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
xmitframe_plist = get_next(xmitframe_plist);
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;
rtw_hal_xmitframe_enqueue(padapter, pxmitframe);
if (psta->sleepq_len == 0) {
pstapriv->tim_bitmap &= ~BIT(psta->aid);
/* update BCN for TIM IE */
/* update_BCNTIM(padapter); */
update_beacon(padapter, WLAN_EID_TIM, NULL, true);
}
/* spin_unlock_bh(&psta->sleep_q.lock); */
spin_unlock_bh(&pxmitpriv->lock);
} else {
/* spin_unlock_bh(&psta->sleep_q.lock); */
spin_unlock_bh(&pxmitpriv->lock);
if (pstapriv->tim_bitmap&BIT(psta->aid)) {
if (psta->sleepq_len == 0) {
/* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
issue_nulldata_in_interrupt(padapter, psta->hwaddr);
} else {
psta->sleepq_len = 0;
}
pstapriv->tim_bitmap &= ~BIT(psta->aid);
/* update BCN for TIM IE */
/* update_BCNTIM(padapter); */
update_beacon(padapter, WLAN_EID_TIM, NULL, true);
}
}
}
}
return _FAIL;
}
/* perform defrag */
static union recv_frame *recvframe_defrag(struct adapter *adapter,
struct __queue *defrag_q)
{
struct list_head *plist, *phead;
u8 wlanhdr_offset;
u8 curfragnum;
struct recv_frame_hdr *pfhdr, *pnfhdr;
union 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 = get_next(phead);
prframe = (union recv_frame *)plist;
pfhdr = &prframe->u.hdr;
list_del_init(&(prframe->u.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 = get_next(plist);
while (phead != plist) {
pnextrframe = (union recv_frame *)plist;
pnfhdr = &pnextrframe->u.hdr;
/* 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 = get_next(plist);
}
/* free the defrag_q queue and return the prframe */
rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
return prframe;
}
/* check if need to defrag, if needed queue the frame to defrag_q */
static union recv_frame *recvframe_chk_defrag(struct adapter *padapter, union recv_frame *precv_frame)
{
u8 ismfrag;
u8 fragnum;
u8 *psta_addr;
struct recv_frame_hdr *pfhdr;
struct sta_info *psta;
struct sta_priv *pstapriv;
struct list_head *phead;
union recv_frame *prtnframe = NULL;
struct __queue *pfree_recv_queue, *pdefrag_q;
pstapriv = &padapter->stapriv;
pfhdr = &precv_frame->u.hdr;
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) {
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) {
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 */
/* spin_lock(&pdefrag_q->lock); */
phead = get_list_head(pdefrag_q);
list_add_tail(&pfhdr->list, phead);
/* spin_unlock(&pdefrag_q->lock); */
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;
}
}
if ((ismfrag == 0) && (fragnum != 0)) {
/* the last fragment frame */
/* enqueue the last fragment */
if (pdefrag_q) {
/* spin_lock(&pdefrag_q->lock); */
phead = get_list_head(pdefrag_q);
list_add_tail(&pfhdr->list, phead);
/* spin_unlock(&pdefrag_q->lock); */
/* call recvframe_defrag to defrag */
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;
}
}
if ((prtnframe) && (prtnframe->u.hdr.attrib.privacy)) {
/* after defrag we must check tkip mic code */
if (recvframe_chkmic(padapter, prtnframe) == _FAIL) {
rtw_free_recvframe(prtnframe, pfree_recv_queue);
prtnframe = NULL;
}
}
return prtnframe;
}
static signed int validate_recv_mgnt_frame(struct adapter *padapter, union recv_frame *precv_frame)
{
/* struct mlme_priv *pmlmepriv = &adapter->mlmepriv; */
precv_frame = recvframe_chk_defrag(padapter, precv_frame);
if (!precv_frame)
return _SUCCESS;
{
/* for rx pkt statistics */
struct sta_info *psta = rtw_get_stainfo(&padapter->stapriv, GetAddr2Ptr(precv_frame->u.hdr.rx_data));
if (psta) {
psta->sta_stats.rx_mgnt_pkts++;
if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_BEACON)
psta->sta_stats.rx_beacon_pkts++;
else if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_PROBEREQ)
psta->sta_stats.rx_probereq_pkts++;
else if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_PROBERSP) {
if (!memcmp(padapter->eeprompriv.mac_addr, GetAddr1Ptr(precv_frame->u.hdr.rx_data), ETH_ALEN))
psta->sta_stats.rx_probersp_pkts++;
else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->u.hdr.rx_data)) ||
is_multicast_mac_addr(GetAddr1Ptr(precv_frame->u.hdr.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 signed int validate_recv_data_frame(struct adapter *adapter, union recv_frame *precv_frame)
{
u8 bretry;
u8 *psa, *pda, *pbssid;
struct sta_info *psta = NULL;
u8 *ptr = precv_frame->u.hdr.rx_data;
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
struct security_priv *psecuritypriv = &adapter->securitypriv;
signed int ret = _SUCCESS;
bretry = GetRetry(ptr);
pda = get_da(ptr);
psa = get_sa(ptr);
pbssid = get_hdr_bssid(ptr);
if (!pbssid) {
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;
break;
default:
ret = _FAIL;
break;
}
if (ret == _FAIL) {
goto exit;
} else if (ret == RTW_RX_HANDLED) {
goto exit;
}
if (!psta) {
ret = _FAIL;
goto exit;
}
/* psta->rssi = prxcmd->rssi; */
/* psta->signal_quality = prxcmd->sq; */
precv_frame->u.hdr.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->u.hdr.preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
/* decache, drop duplicate recv packets */
if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
ret = _FAIL;
goto exit;
}
if (pattrib->privacy) {
GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, is_multicast_ether_addr(pattrib->ra));
SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
} else {
pattrib->encrypt = 0;
pattrib->iv_len = pattrib->icv_len = 0;
}
exit:
return ret;
}
static signed int validate_80211w_mgmt(struct adapter *adapter, union recv_frame *precv_frame)
{
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
u8 *ptr = precv_frame->u.hdr.rx_data;
u8 subtype;
subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
/* only support station mode */
if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) && check_fwstate(pmlmepriv, _FW_LINKED) &&
adapter->securitypriv.binstallBIPkey == true) {
/* unicast management frame decrypt */
if (pattrib->privacy && !(is_multicast_ether_addr(GetAddr1Ptr(ptr))) &&
(subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC || subtype == WIFI_ACTION)) {
u8 *mgmt_DATA;
u32 data_len = 0;
pattrib->bdecrypted = 0;
pattrib->encrypt = _AES_;
pattrib->hdrlen = sizeof(struct ieee80211_hdr_3addr);
/* set iv and icv length */
SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
/* actual management data frame body */
data_len = pattrib->pkt_len - pattrib->hdrlen - pattrib->iv_len - pattrib->icv_len;
mgmt_DATA = rtw_zmalloc(data_len);
if (!mgmt_DATA)
goto validate_80211w_fail;
precv_frame = decryptor(adapter, precv_frame);
/* save actual management data frame body */
memcpy(mgmt_DATA, ptr+pattrib->hdrlen+pattrib->iv_len, data_len);
/* overwrite the iv field */
memcpy(ptr+pattrib->hdrlen, mgmt_DATA, data_len);
/* remove the iv and icv length */
pattrib->pkt_len = pattrib->pkt_len - pattrib->iv_len - pattrib->icv_len;
kfree(mgmt_DATA);
if (!precv_frame)
goto validate_80211w_fail;
} else if (is_multicast_ether_addr(GetAddr1Ptr(ptr)) &&
(subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC)) {
signed int BIP_ret = _SUCCESS;
/* verify BIP MME IE of broadcast/multicast de-auth/disassoc packet */
BIP_ret = rtw_BIP_verify(adapter, (u8 *)precv_frame);
if (BIP_ret == _FAIL) {
goto validate_80211w_fail;
} else if (BIP_ret == RTW_RX_HANDLED) {
/* issue sa query request */
issue_action_SA_Query(adapter, NULL, 0, 0);
goto validate_80211w_fail;
}
} else { /* 802.11w protect */
if (subtype == WIFI_ACTION) {
/* according 802.11-2012 standard, these five types are not robust types */
if (ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_PUBLIC &&
ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_HT &&
ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_UNPROTECTED_WNM &&
ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_SELF_PROTECTED &&
ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_P2P) {
goto validate_80211w_fail;
}
} else if (subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC) {
/* issue sa query request */
issue_action_SA_Query(adapter, NULL, 0, 0);
goto validate_80211w_fail;
}
}
}
return _SUCCESS;
validate_80211w_fail:
return _FAIL;
}
static signed int validate_recv_frame(struct adapter *adapter, union 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;
signed int retval = _SUCCESS;
u8 bDumpRxPkt;
struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
u8 *ptr = precv_frame->u.hdr.rx_data;
u8 ver = (unsigned char) (*ptr)&0x3;
/* add version chk */
if (ver != 0) {
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);
rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
switch (type) {
case WIFI_MGT_TYPE: /* mgnt */
if (validate_80211w_mgmt(adapter, precv_frame) == _FAIL) {
retval = _FAIL;
break;
}
retval = validate_recv_mgnt_frame(adapter, precv_frame);
retval = _FAIL; /* only data frame return _SUCCESS */
break;
case WIFI_CTRL_TYPE: /* ctrl */
retval = validate_recv_ctrl_frame(adapter, precv_frame);
retval = _FAIL; /* only data frame return _SUCCESS */
break;
case WIFI_DATA_TYPE: /* data */
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++;
} else if (retval == _SUCCESS) {
#ifdef DBG_RX_DUMP_EAP
u8 bDumpRxPkt;
u16 eth_type;
/* dump eapol */
rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
/* get ether_type */
memcpy(ð_type, ptr + pattrib->hdrlen + pattrib->iv_len + LLC_HEADER_LENGTH, 2);
eth_type = ntohs((unsigned short) eth_type);
#endif
}
break;
default:
retval = _FAIL;
break;
}
exit:
return retval;
}
/* remove the wlanhdr and add the eth_hdr */
static signed int wlanhdr_to_ethhdr(union recv_frame *precvframe)
{
signed int rmv_len;
u16 eth_type, len;
u8 bsnaphdr;
u8 *psnap_type;
struct ieee80211_snap_hdr *psnap;
__be16 be_tmp;
struct adapter *adapter = precvframe->u.hdr.adapter;
struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
u8 *ptr = precvframe->u.hdr.rx_data; /* point to frame_ctrl field */
struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.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 */
/* eth_type = (psnap_type[0] << 8) | psnap_type[1]; */
if ((!memcmp(psnap, rfc1042_header, SNAP_SIZE) &&
(memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2)) &&
(memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2))) ||
/* eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) || */
!memcmp(psnap, 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->u.hdr.len - rmv_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) == true)) {
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);
if (!ptr)
return _FAIL;
memcpy(ptr, get_rxmem(precvframe), 24);
ptr += 24;
} else {
ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr?2:0)));
if (!ptr)
return _FAIL;
}
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;
}
static int amsdu_to_msdu(struct adapter *padapter, union recv_frame *prframe)
{
int a_len, padding_len;
u16 nSubframe_Length;
u8 nr_subframes, i;
u8 *pdata;
struct sk_buff *sub_pkt, *subframes[MAX_SUBFRAME_COUNT];
struct recv_priv *precvpriv = &padapter->recvpriv;
struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
nr_subframes = 0;
recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen);
if (prframe->u.hdr.attrib.iv_len > 0)
recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len);
a_len = prframe->u.hdr.len;
pdata = prframe->u.hdr.rx_data;
while (a_len > ETH_HLEN) {
/* Offset 12 denote 2 mac address */
nSubframe_Length = get_unaligned_be16(pdata + 12);
if (a_len < ETH_HLEN + nSubframe_Length)
break;
sub_pkt = rtw_os_alloc_msdu_pkt(prframe, nSubframe_Length, pdata);
if (!sub_pkt)
break;
/* move the data point to data content */
pdata += ETH_HLEN;
a_len -= ETH_HLEN;
subframes[nr_subframes++] = sub_pkt;
if (nr_subframes >= MAX_SUBFRAME_COUNT)
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)
break;
pdata += padding_len;
a_len -= padding_len;
}
}
for (i = 0; i < nr_subframes; i++) {
sub_pkt = subframes[i];
/* Indicate the packets to upper layer */
if (sub_pkt)
rtw_os_recv_indicate_pkt(padapter, sub_pkt, &prframe->u.hdr.attrib);
}
prframe->u.hdr.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)
{
struct adapter *padapter = preorder_ctrl->padapter;
struct dvobj_priv *psdpriv = padapter->dvobj;
struct debug_priv *pdbgpriv = &psdpriv->drv_dbg;
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)) {
/* boundary situation, when seq_num cross 0xFFF */
if (seq_num >= (wsize - 1))
preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
else
preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
pdbgpriv->dbg_rx_ampdu_window_shift_cnt++;
}
return true;
}
static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl, union recv_frame *prframe)
{
struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
struct list_head *phead, *plist;
union recv_frame *pnextrframe;
struct rx_pkt_attrib *pnextattrib;
/* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */
/* spin_lock(&ppending_recvframe_queue->lock); */
phead = get_list_head(ppending_recvframe_queue);
plist = get_next(phead);
while (phead != plist) {
pnextrframe = (union recv_frame *)plist;
pnextattrib = &pnextrframe->u.hdr.attrib;
if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
plist = get_next(plist);
else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
/* Duplicate entry is found!! Do not insert current entry. */
/* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
return false;
else
break;
}
/* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */
/* spin_lock(&ppending_recvframe_queue->lock); */
list_del_init(&(prframe->u.hdr.list));
list_add_tail(&(prframe->u.hdr.list), plist);
/* spin_unlock(&ppending_recvframe_queue->lock); */
/* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
return true;
}
static void recv_indicatepkts_pkt_loss_cnt(struct debug_priv *pdbgpriv, u64 prev_seq, u64 current_seq)
{
if (current_seq < prev_seq)
pdbgpriv->dbg_rx_ampdu_loss_count += (4096 + current_seq - prev_seq);
else
pdbgpriv->dbg_rx_ampdu_loss_count += (current_seq - prev_seq);
}
static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
{
struct list_head *phead, *plist;
union recv_frame *prframe;
struct rx_pkt_attrib *pattrib;
/* u8 index = 0; */
int bPktInBuf = false;
struct recv_priv *precvpriv = &padapter->recvpriv;
struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
struct dvobj_priv *psdpriv = padapter->dvobj;
struct debug_priv *pdbgpriv = &psdpriv->drv_dbg;
/* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */
/* spin_lock(&ppending_recvframe_queue->lock); */
phead = get_list_head(ppending_recvframe_queue);
plist = get_next(phead);
/* Handling some condition for forced indicate case. */
if (bforced == true) {
pdbgpriv->dbg_rx_ampdu_forced_indicate_count++;
if (list_empty(phead)) {
/* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
/* spin_unlock(&ppending_recvframe_queue->lock); */
return true;
}
prframe = (union recv_frame *)plist;
pattrib = &prframe->u.hdr.attrib;
recv_indicatepkts_pkt_loss_cnt(pdbgpriv, preorder_ctrl->indicate_seq, pattrib->seq_num);
preorder_ctrl->indicate_seq = pattrib->seq_num;
}
/* Prepare indication list and indication. */
/* Check if there is any packet need indicate. */
while (!list_empty(phead)) {
prframe = (union recv_frame *)plist;
pattrib = &prframe->u.hdr.attrib;
if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
plist = get_next(plist);
list_del_init(&(prframe->u.hdr.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. */
/* pTS->RxIndicateState = RXTS_INDICATE_PROCESSING; */
/* Indicate packets */
/* indicate this recv_frame */
if (!pattrib->amsdu) {
if ((padapter->bDriverStopped == false) &&
(padapter->bSurpriseRemoved == false))
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;
}
}
/* spin_unlock(&ppending_recvframe_queue->lock); */
/* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
return bPktInBuf;
}
static int recv_indicatepkt_reorder(struct adapter *padapter, union recv_frame *prframe)
{
int retval = _SUCCESS;
struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib;
struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl;
struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
struct dvobj_priv *psdpriv = padapter->dvobj;
struct debug_priv *pdbgpriv = &psdpriv->drv_dbg;
if (!pattrib->amsdu) {
/* s1. */
wlanhdr_to_ethhdr(prframe);
if (pattrib->qos != 1) {
if ((padapter->bDriverStopped == false) &&
(padapter->bSurpriseRemoved == false)) {
rtw_recv_indicatepkt(padapter, prframe);
return _SUCCESS;
}
return _FAIL;
}
if (preorder_ctrl->enable == false) {
/* 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 == false) {
preorder_ctrl->indicate_seq = pattrib->seq_num;
retval = amsdu_to_msdu(padapter, prframe);
preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
if (retval != _SUCCESS) {
}
return retval;
}
}
spin_lock_bh(&ppending_recvframe_queue->lock);
/* s2. check if winstart_b(indicate_seq) needs to been updated */
if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
pdbgpriv->dbg_rx_ampdu_drop_count++;
goto _err_exit;
}
/* s3. Insert all packet into Reorder Queue to maintain its ordering. */
if (!enqueue_reorder_recvframe(preorder_ctrl, prframe)) {
/* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */
/* return _FAIL; */
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) == true) {
_set_timer(&preorder_ctrl->reordering_ctrl_timer, 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);
}
return _SUCCESS;
_err_exit:
spin_unlock_bh(&ppending_recvframe_queue->lock);
return _FAIL;
}
void rtw_reordering_ctrl_timeout_handler(struct timer_list *t)
{
struct recv_reorder_ctrl *preorder_ctrl =
from_timer(preorder_ctrl, t, reordering_ctrl_timer);
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)
_set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME);
spin_unlock_bh(&ppending_recvframe_queue->lock);
}
static int process_recv_indicatepkts(struct adapter *padapter, union recv_frame *prframe)
{
int retval = _SUCCESS;
/* struct recv_priv *precvpriv = &padapter->recvpriv; */
/* struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; */
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
struct ht_priv *phtpriv = &pmlmepriv->htpriv;
if (phtpriv->ht_option == true) { /* B/G/N Mode */
/* prframe->u.hdr.preorder_ctrl = &precvpriv->recvreorder_ctrl[pattrib->priority]; */
if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) { /* including perform A-MPDU Rx Ordering Buffer Control */
if ((padapter->bDriverStopped == false) &&
(padapter->bSurpriseRemoved == false)) {
retval = _FAIL;
return retval;
}
}
} else { /* B/G mode */
retval = wlanhdr_to_ethhdr(prframe);
if (retval != _SUCCESS)
return retval;
if ((padapter->bDriverStopped == false) && (padapter->bSurpriseRemoved == false)) {
/* indicate this recv_frame */
rtw_recv_indicatepkt(padapter, prframe);
} else {
retval = _FAIL;
return retval;
}
}
return retval;
}
static int recv_func_prehandle(struct adapter *padapter, union 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) {
rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
goto exit;
}
exit:
return ret;
}
static int recv_func_posthandle(struct adapter *padapter, union recv_frame *prframe)
{
int ret = _SUCCESS;
union recv_frame *orig_prframe = prframe;
struct recv_priv *precvpriv = &padapter->recvpriv;
struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
prframe = decryptor(padapter, prframe);
if (!prframe) {
ret = _FAIL;
goto _recv_data_drop;
}
prframe = recvframe_chk_defrag(padapter, prframe);
if (!prframe)
goto _recv_data_drop;
prframe = portctrl(padapter, prframe);
if (!prframe) {
ret = _FAIL;
goto _recv_data_drop;
}
count_rx_stats(padapter, prframe, NULL);
ret = process_recv_indicatepkts(padapter, prframe);
if (ret != _SUCCESS) {
rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
goto _recv_data_drop;
}
_recv_data_drop:
precvpriv->rx_drop++;
return ret;
}
static int recv_func(struct adapter *padapter, union recv_frame *rframe)
{
int ret;
struct rx_pkt_attrib *prxattrib = &rframe->u.hdr.attrib;
struct recv_priv *recvpriv = &padapter->recvpriv;
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) {
union recv_frame *pending_frame;
while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue)))
recv_func_posthandle(padapter, pending_frame);
}
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_multicast_ether_addr(prxattrib->ra) && prxattrib->encrypt > 0 &&
(prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt == true) &&
psecuritypriv->ndisauthtype == Ndis802_11AuthModeWPAPSK &&
!psecuritypriv->busetkipkey) {
rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
if (recvpriv->free_recvframe_cnt < NR_RECVFRAME/4) {
/* to prevent from recvframe starvation, get recvframe from uc_swdec_pending_queue to free_recvframe_cnt */
rframe = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue);
if (rframe)
goto do_posthandle;
}
goto exit;
}
do_posthandle:
ret = recv_func_posthandle(padapter, rframe);
}
exit:
return ret;
}
s32 rtw_recv_entry(union recv_frame *precvframe)
{
struct adapter *padapter;
struct recv_priv *precvpriv;
s32 ret = _SUCCESS;
padapter = precvframe->u.hdr.adapter;
precvpriv = &padapter->recvpriv;
ret = recv_func(padapter, precvframe);
if (ret == _FAIL)
goto _recv_entry_drop;
precvpriv->rx_pkts++;
return ret;
_recv_entry_drop:
return ret;
}
static void rtw_signal_stat_timer_hdl(struct timer_list *t)
{
struct adapter *adapter =
from_timer(adapter, t, recvpriv.signal_stat_timer);
struct recv_priv *recvpriv = &adapter->recvpriv;
u32 tmp_s, tmp_q;
u8 avg_signal_strength = 0;
u8 avg_signal_qual = 0;
u32 num_signal_strength = 0;
u32 __maybe_unused num_signal_qual = 0;
u8 _alpha = 5; /* 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;
num_signal_strength = recvpriv->signal_strength_data.total_num;
/* 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;
num_signal_qual = recvpriv->signal_qual_data.total_num;
/* after avg_vals are acquired, we can re-stat the signal values */
recvpriv->signal_qual_data.update_req = 1;
}
if (num_signal_strength == 0) {
if (rtw_get_on_cur_ch_time(adapter) == 0 ||
jiffies_to_msecs(jiffies - rtw_get_on_cur_ch_time(adapter)) < 2 * adapter->mlmeextpriv.mlmext_info.bcn_interval
) {
goto set_timer;
}
}
if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == true ||
check_fwstate(&adapter->mlmepriv, _FW_LINKED) == false
) {
goto set_timer;
}
/* update value of signal_strength, rssi, signal_qual */
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;
}
set_timer:
rtw_set_signal_stat_timer(recvpriv);
}
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