diff options
Diffstat (limited to 'drivers/staging/rtl8188eu/core/rtw_recv.c')
| -rw-r--r-- | drivers/staging/rtl8188eu/core/rtw_recv.c | 2063 |
1 files changed, 2063 insertions, 0 deletions
diff --git a/drivers/staging/rtl8188eu/core/rtw_recv.c b/drivers/staging/rtl8188eu/core/rtw_recv.c new file mode 100644 index 0000000..21497c2 --- /dev/null +++ b/drivers/staging/rtl8188eu/core/rtw_recv.c @@ -0,0 +1,2063 @@ +// SPDX-License-Identifier: GPL-2.0 +/****************************************************************************** + * + * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved. + * + ******************************************************************************/ +#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 +}; + +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); + + _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->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ); + + if (!precvpriv->pallocated_frame_buf) + return _FAIL; + + precvframe = PTR_ALIGN(precvpriv->pallocated_frame_buf, RXFRAME_ALIGN_SZ); + + for (i = 0; i < NR_RECVFRAME; i++) { + INIT_LIST_HEAD(&(precvframe->list)); + + list_add_tail(&(precvframe->list), + &(precvpriv->free_recv_queue.queue)); + + precvframe->pkt = NULL; + + precvframe->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 = 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); + + 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; + + hdr = list_first_entry_or_null(&pfree_recv_queue->queue, + struct recv_frame, list); + if (hdr) + list_del_init(&hdr->list); + + return 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) +{ + if (!precvframe) + return _FAIL; + 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)); + + list_add_tail(&(precvframe->list), get_list_head(pfree_recv_queue)); + + spin_unlock_bh(&pfree_recv_queue->lock); + + return _SUCCESS; +} + +int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue) +{ + list_del_init(&(precvframe->list)); + list_add_tail(&(precvframe->list), get_list_head(queue)); + + 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 = list_entry(plist, struct recv_frame, list); + + plist = plist->next; + + rtw_free_recvframe(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 %s: prxattrib->encrypt==_TKIP_\n", __func__)); + RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, + ("\n %s: da=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n", + __func__, prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], + prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5])); + + /* calculate mic code */ + if (stainfo) { + if (IS_MCAST(prxattrib->ra)) { + if (!psecuritypriv) { + res = _FAIL; + RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, + ("\n %s: didn't install group key!!!!!!!!!!\n", __func__)); + DBG_88E("\n %s: didn't install group key!!!!!!!!!!\n", __func__); + goto exit; + } + mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0]; + + RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, + ("\n %s: bcmc key\n", __func__)); + } else { + mickey = &stainfo->dot11tkiprxmickey.skey[0]; + RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, + ("\n %s: unicast key\n", __func__)); + } + + /* icv_len included the mic code */ + datalen = precvframe->pkt->len-prxattrib->hdrlen - + prxattrib->iv_len-prxattrib->icv_len-8; + pframe = precvframe->pkt->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_, + ("%s: miccode[%d](%02x)!=*(pframemic+%d)(%02x) ", + __func__, 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->pkt->len)); + for (i = 0; i < precvframe->pkt->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->pkt->data+i), + *(precvframe->pkt->data+i+1), + *(precvframe->pkt->data+i+2), + *(precvframe->pkt->data+i+3), + *(precvframe->pkt->data+i+4), + *(precvframe->pkt->data+i+5), + *(precvframe->pkt->data+i+6), + *(precvframe->pkt->data+i+7))); + } + RT_TRACE(_module_rtl871x_recv_c_, + _drv_err_, + ("\n ====== demp packet end [len=%d]======\n", + precvframe->pkt->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_, + ("%s: rtw_get_stainfo==NULL!!!\n", __func__)); + } + + skb_trim(precvframe->pkt, precvframe->pkt->len - 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->pkt->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->hw_decrypted = false; + + switch (prxattrib->encrypt) { + case _WEP40_: + case _WEP104_: + res = 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->pkt->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_, ("########%s:adapter->securitypriv.dot11AuthAlgrthm=%d\n", __func__, adapter->securitypriv.dot11AuthAlgrthm)); + + if (auth_alg == 2) { + /* get ether_type */ + ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE + pfhdr->attrib.iv_len; + 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_, ("########%s:psta->ieee8021x_blocked==1\n", __func__)); + + 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_, ("########%s:psta->ieee8021x_blocked==0\n", __func__)); + RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, + ("%s:precv_frame->hdr.attrib.privacy=%x\n", + __func__, precv_frame->attrib.privacy)); + + if (pattrib->bdecrypted == 0) + RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("%s:prxstat->decrypted=%x\n", __func__, 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_, ("########%s:ether_type==0x888e\n", __func__)); + /* check Rekey */ + + prtnframe = precv_frame; + } else { + RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########%s:ether_type=0x%04x\n", __func__, 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_, ("%s, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", __func__, seq_ctrl, tid)); + + return _FAIL; + } + + if (1) {/* if (bretry) */ + if (seq_ctrl == prxcache->tid_rxseq[tid]) { + RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s, seq_ctrl=0x%x, tid=0x%x, tid_rxseq=0x%x\n", __func__, 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 CPTCFG_88EU_AP_MODE + unsigned char pwrbit; + u8 *ptr = precv_frame->pkt->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 CPTCFG_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->pkt->len; + precvpriv->rx_bytes += sz; + + padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++; + + if (!is_multicast_ether_addr(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) +{ + 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 { + 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 %s ; drop pkt\n", __func__)); + 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->pkt->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_, + (" %s: compare DA fail; DA=%pM\n", __func__, (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_, + (" %s: compare BSSID fail ; BSSID=%pM\n", __func__, (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_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->pkt->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 CPTCFG_88EU_AP_MODE + struct rx_pkt_attrib *pattrib = &precv_frame->attrib; + struct sta_priv *pstapriv = &padapter->stapriv; + u8 *pframe = precv_frame->pkt->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 = list_entry(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_, ("+%s\n", __func__)); + + precv_frame = recvframe_chk_defrag(padapter, precv_frame); + if (!precv_frame) { + 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->pkt->data)); + if (psta) { + psta->sta_stats.rx_mgnt_pkts++; + if (GetFrameSubType(precv_frame->pkt->data) == WIFI_BEACON) { + psta->sta_stats.rx_beacon_pkts++; + } else if (GetFrameSubType(precv_frame->pkt->data) == WIFI_PROBEREQ) { + psta->sta_stats.rx_probereq_pkts++; + } else if (GetFrameSubType(precv_frame->pkt->data) == WIFI_PROBERSP) { + if (!memcmp(padapter->eeprompriv.mac_addr, + GetAddr1Ptr(precv_frame->pkt->data), ETH_ALEN)) + psta->sta_stats.rx_probersp_pkts++; + else if (is_multicast_ether_addr(GetAddr1Ptr(precv_frame->pkt->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->pkt->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) { + 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) { + 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_, ("%s:pattrib->privacy=%x\n", __func__, 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->pkt->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 */ + if (_drv_err_ <= GlobalDebugLevel) { + pr_info(DRIVER_PREFIX "#############################\n"); + print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE, + 16, 1, ptr, 64, false); + pr_info(DRIVER_PREFIX "#############################\n"); + } + } else if (bDumpRxPkt == 2) { + if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_MGT_TYPE)) { + pr_info(DRIVER_PREFIX "#############################\n"); + print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE, + 16, 1, ptr, 64, false); + pr_info(DRIVER_PREFIX "#############################\n"); + } + } else if (bDumpRxPkt == 3) { + if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_DATA_TYPE)) { + pr_info(DRIVER_PREFIX "#############################\n"); + print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE, + 16, 1, ptr, 64, false); + pr_info(DRIVER_PREFIX "#############################\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 */ + LedControl8188eu(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; + + u8 *ptr = precvframe->pkt->data; + struct rx_pkt_attrib *pattrib = &precvframe->attrib; + + if (pattrib->encrypt) + skb_trim(precvframe->pkt, precvframe->pkt->len - 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->pkt->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; + + ptr = skb_pull(precvframe->pkt, 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; +} + +/* 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 = list_entry(plist, struct recv_frame, list); + prframe = 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 = list_entry(plist, struct recv_frame, list); + pnextrframe = 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; + + skb_pull(pnextrframe->pkt, wlanhdr_offset); + + /* append to first fragment frame's tail (if privacy frame, pull the ICV) */ + skb_trim(prframe->pkt, prframe->pkt->len - pfhdr->attrib.icv_len); + + /* memcpy */ + memcpy(skb_tail_pointer(pfhdr->pkt), pnfhdr->pkt->data, + pnfhdr->pkt->len); + + skb_put(prframe->pkt, pnfhdr->pkt->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) { + u8 type = GetFrameType(pfhdr->pkt->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 */ + + 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) { + 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; + 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; + + skb_pull(prframe->pkt, prframe->attrib.hdrlen); + + if (prframe->attrib.iv_len > 0) + skb_pull(prframe->pkt, prframe->attrib.iv_len); + + a_len = prframe->pkt->len; + + pdata = prframe->pkt->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); + skb_put_data(sub_skb, 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: + 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 = list_entry(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 = list_entry(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 = list_entry(plist, struct recv_frame, list); + prframe = prhdr; + pattrib = &prframe->attrib; + + if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) { + RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, + ("%s: indicate=%d seq=%d amsdu=%d\n", + __func__, 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_, ("@@@@ %s -recv_func recv_indicatepkt\n", __func__)); + + 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_, + ("%s: indicate=%d seq=%d\n", __func__, + 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(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) + 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_, ("@@@@ %s- recv_func recv_indicatepkt\n", __func__)); + rtw_recv_indicatepkt(padapter, prframe); + } else { + RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ %s- recv_func free_indicatepkt\n", __func__)); + + 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 */ + LedControl8188eu(padapter, LED_CTL_RX); + + prframe = decryptor(padapter, prframe); + if (!prframe) { + 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) { + RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n")); + goto _recv_data_drop; + } + + prframe = portctrl(padapter, prframe); + if (!prframe) { + 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 && + !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_, ("%s: recv_func return fail!!!\n", __func__)); + 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; + u8 _alpha = 3; /* this value is based on converging_constant = 5000 and sampling_interval = 1000 */ + + 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; + tmp_s = DIV_ROUND_UP(tmp_s, _alpha); + if (tmp_s > 100) + tmp_s = 100; + + tmp_q = avg_signal_qual + + (_alpha - 1) * recvpriv->signal_qual; + tmp_q = DIV_ROUND_UP(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); +} |