diff options
Diffstat (limited to 'drivers/staging/r8188eu/core/rtw_recv.c')
| -rw-r--r-- | drivers/staging/r8188eu/core/rtw_recv.c | 2010 |
1 files changed, 0 insertions, 2010 deletions
diff --git a/drivers/staging/r8188eu/core/rtw_recv.c b/drivers/staging/r8188eu/core/rtw_recv.c deleted file mode 100644 index fc7568cf948b..000000000000 --- a/drivers/staging/r8188eu/core/rtw_recv.c +++ /dev/null @@ -1,2010 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Copyright(c) 2007 - 2012 Realtek Corporation. */ - -#define _RTW_RECV_C_ - -#include <linux/ieee80211.h> -#include "../include/osdep_service.h" -#include "../include/drv_types.h" -#include "../include/usb_ops.h" -#include "../include/wifi.h" -#include "../include/rtl8188e_recv.h" - -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); - -} - -static int rtl8188eu_init_recv_priv(struct adapter *padapter) -{ - struct recv_priv *precvpriv = &padapter->recvpriv; - int i, err = 0; - struct recv_buf *precvbuf; - - tasklet_init(&precvpriv->recv_tasklet, - rtl8188eu_recv_tasklet, - (unsigned long)padapter); - - /* init recv_buf */ - rtw_init_queue(&precvpriv->free_recv_buf_queue); - - precvpriv->pallocated_recv_buf = kzalloc(NR_RECVBUFF * sizeof(struct recv_buf) + 4, - GFP_KERNEL); - if (!precvpriv->pallocated_recv_buf) - return -ENOMEM; - - precvpriv->precv_buf = (u8 *)ALIGN((size_t)(precvpriv->pallocated_recv_buf), 4); - - precvbuf = (struct recv_buf *)precvpriv->precv_buf; - - for (i = 0; i < NR_RECVBUFF; i++) { - precvbuf->pskb = NULL; - precvbuf->reuse = false; - precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL); - if (!precvbuf->purb) { - err = -ENOMEM; - break; - } - precvbuf->adapter = padapter; - precvbuf++; - } - precvpriv->free_recv_buf_queue_cnt = NR_RECVBUFF; - skb_queue_head_init(&precvpriv->rx_skb_queue); - { - int i; - size_t tmpaddr = 0; - size_t alignment = 0; - struct sk_buff *pskb = NULL; - - skb_queue_head_init(&precvpriv->free_recv_skb_queue); - - for (i = 0; i < NR_PREALLOC_RECV_SKB; i++) { - pskb = __netdev_alloc_skb(padapter->pnetdev, - MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ, GFP_KERNEL); - if (pskb) { - pskb->dev = padapter->pnetdev; - tmpaddr = (size_t)pskb->data; - alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1); - skb_reserve(pskb, (RECVBUFF_ALIGN_SZ - alignment)); - - skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb); - } - pskb = NULL; - } - } - - return err; -} - -int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter) -{ - int i; - struct recv_frame *precvframe; - int err; - - spin_lock_init(&precvpriv->lock); - - rtw_init_queue(&precvpriv->free_recv_queue); - rtw_init_queue(&precvpriv->recv_pending_queue); - rtw_init_queue(&precvpriv->uc_swdec_pending_queue); - - precvpriv->adapter = padapter; - - precvpriv->free_recvframe_cnt = NR_RECVFRAME; - - precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ); - if (!precvpriv->pallocated_frame_buf) - return -ENOMEM; - - precvpriv->precv_frame_buf = (u8 *)ALIGN((size_t)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ); - - precvframe = (struct recv_frame *)precvpriv->precv_frame_buf; - - for (i = 0; i < NR_RECVFRAME; i++) { - INIT_LIST_HEAD(&precvframe->list); - - list_add_tail(&precvframe->list, &precvpriv->free_recv_queue.queue); - - precvframe->pkt = NULL; - - precvframe->len = 0; - - precvframe->adapter = padapter; - precvframe++; - } - precvpriv->rx_pending_cnt = 1; - - err = rtl8188eu_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 err; -} - -static void rtl8188eu_free_recv_priv(struct adapter *padapter) -{ - int i; - struct recv_buf *precvbuf; - struct recv_priv *precvpriv = &padapter->recvpriv; - - precvbuf = (struct recv_buf *)precvpriv->precv_buf; - - for (i = 0; i < NR_RECVBUFF; i++) { - usb_free_urb(precvbuf->purb); - precvbuf++; - } - - kfree(precvpriv->pallocated_recv_buf); - - skb_queue_purge(&precvpriv->rx_skb_queue); - - skb_queue_purge(&precvpriv->free_recv_skb_queue); -} - -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); - - rtl8188eu_free_recv_priv(padapter); - _cancel_timer_ex(&precvpriv->signal_stat_timer); -} - -struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue) -{ - struct recv_frame *hdr; - struct list_head *plist, *phead; - struct adapter *padapter; - struct recv_priv *precvpriv; - - if (list_empty(&pfree_recv_queue->queue)) { - hdr = NULL; - } else { - phead = get_list_head(pfree_recv_queue); - - plist = phead->next; - - hdr = container_of(plist, struct recv_frame, list); - - list_del_init(&hdr->list); - padapter = hdr->adapter; - if (padapter) { - precvpriv = &padapter->recvpriv; - if (pfree_recv_queue == &precvpriv->free_recv_queue) - precvpriv->free_recvframe_cnt--; - } - } - - return (struct recv_frame *)hdr; -} - -struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue) -{ - struct recv_frame *precvframe; - - spin_lock_bh(&pfree_recv_queue->lock); - - precvframe = _rtw_alloc_recvframe(pfree_recv_queue); - - spin_unlock_bh(&pfree_recv_queue->lock); - - return precvframe; -} - -int rtw_free_recvframe(struct recv_frame *precvframe, struct __queue *pfree_recv_queue) -{ - struct adapter *padapter; - struct recv_priv *precvpriv; - - if (!precvframe) - return _FAIL; - padapter = precvframe->adapter; - precvpriv = &padapter->recvpriv; - if (precvframe->pkt) { - dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */ - precvframe->pkt = NULL; - } - - spin_lock_bh(&pfree_recv_queue->lock); - - list_del_init(&precvframe->list); - - precvframe->len = 0; - - list_add_tail(&precvframe->list, get_list_head(pfree_recv_queue)); - - if (padapter && (pfree_recv_queue == &precvpriv->free_recv_queue)) - precvpriv->free_recvframe_cnt++; - - spin_unlock_bh(&pfree_recv_queue->lock); - - return _SUCCESS; -} - -int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue) -{ - struct adapter *padapter = precvframe->adapter; - struct recv_priv *precvpriv = &padapter->recvpriv; - - list_del_init(&precvframe->list); - list_add_tail(&precvframe->list, get_list_head(queue)); - - if (padapter) { - if (queue == &precvpriv->free_recv_queue) - precvpriv->free_recvframe_cnt++; - } - - return _SUCCESS; -} - -int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue) -{ - int ret; - - spin_lock_bh(&queue->lock); - ret = _rtw_enqueue_recvframe(precvframe, queue); - spin_unlock_bh(&queue->lock); - - return ret; -} - -/* - * caller : defrag ; recvframe_chk_defrag in recv_thread (passive) - * pframequeue: defrag_queue : will be accessed in recv_thread (passive) - * - * using spinlock to protect - * - */ - -void rtw_free_recvframe_queue(struct __queue *pframequeue, struct __queue *pfree_recv_queue) -{ - struct recv_frame *hdr; - struct list_head *plist, *phead; - - spin_lock(&pframequeue->lock); - - phead = get_list_head(pframequeue); - plist = phead->next; - - while (phead != plist) { - hdr = container_of(plist, struct recv_frame, list); - - plist = plist->next; - - rtw_free_recvframe((struct recv_frame *)hdr, pfree_recv_queue); - } - - spin_unlock(&pframequeue->lock); - -} - -u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter) -{ - u32 cnt = 0; - struct recv_frame *pending_frame; - - while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) { - rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue); - cnt++; - } - - return cnt; -} - -static void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup) -{ - union iwreq_data wrqu; - struct iw_michaelmicfailure ev; - struct mlme_priv *pmlmepriv = &padapter->mlmepriv; - struct security_priv *psecuritypriv = &padapter->securitypriv; - u32 cur_time = 0; - - if (psecuritypriv->last_mic_err_time == 0) { - psecuritypriv->last_mic_err_time = jiffies; - } else { - cur_time = jiffies; - - if (cur_time - psecuritypriv->last_mic_err_time < 60 * HZ) { - psecuritypriv->btkip_countermeasure = true; - psecuritypriv->last_mic_err_time = 0; - psecuritypriv->btkip_countermeasure_time = cur_time; - } else { - psecuritypriv->last_mic_err_time = jiffies; - } - } - - memset(&ev, 0x00, sizeof(ev)); - if (bgroup) - ev.flags |= IW_MICFAILURE_GROUP; - else - ev.flags |= IW_MICFAILURE_PAIRWISE; - - ev.src_addr.sa_family = ARPHRD_ETHER; - memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN); - memset(&wrqu, 0x00, sizeof(wrqu)); - wrqu.data.length = sizeof(ev); - wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, - &wrqu, (char *)&ev); -} - -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_) { - /* calculate mic code */ - if (stainfo) { - if (is_multicast_ether_addr(prxattrib->ra)) { - mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0]; - - if (!psecuritypriv) { - res = _FAIL; - goto exit; - } - } else { - mickey = &stainfo->dot11tkiprxmickey.skey[0]; - } - - datalen = precvframe->len - prxattrib->hdrlen - prxattrib->iv_len - prxattrib->icv_len - 8;/* icv_len included the mic code */ - pframe = precvframe->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) { - /* double check key_index for some timing issue , */ - /* cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */ - if (is_multicast_ether_addr(prxattrib->ra) && 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 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; - - if (prxattrib->encrypt > 0) { - u8 *iv = precv_frame->rx_data + prxattrib->hdrlen; - - prxattrib->key_index = (((iv[3]) >> 6) & 0x3); - - if (prxattrib->key_index > WEP_KEYS) { - switch (prxattrib->encrypt) { - case _WEP40_: - case _WEP104_: - prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex; - break; - case _TKIP_: - case _AES_: - default: - prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid; - break; - } - } - } - - if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) { - psecuritypriv->hw_decrypted = false; - - switch (prxattrib->encrypt) { - case _WEP40_: - case _WEP104_: - rtw_wep_decrypt(padapter, precv_frame); - break; - case _TKIP_: - res = rtw_tkip_decrypt(padapter, precv_frame); - break; - case _AES_: - res = rtw_aes_decrypt(padapter, 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; - } else { - prxattrib->bdecrypted = true; - } - - 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 = 0; - u16 eapol_type = 0x888e;/* for Funia BD's WPA issue */ - struct rx_pkt_attrib *pattrib; - __be16 be_tmp; - - pstapriv = &adapter->stapriv; - - auth_alg = adapter->securitypriv.dot11AuthAlgrthm; - - ptr = precv_frame->rx_data; - pfhdr = precv_frame; - pattrib = &pfhdr->attrib; - psta_addr = pattrib->ta; - - prtnframe = NULL; - - psta = rtw_get_stainfo(pstapriv, psta_addr); - - if (auth_alg == 2) { - if (psta && psta->ieee8021x_blocked) { - /* blocked */ - /* only accept EAPOL frame */ - prtnframe = precv_frame; - - /* get ether_type */ - ptr = ptr + pfhdr->attrib.hdrlen + pfhdr->attrib.iv_len + LLC_HEADER_SIZE; - 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; - } - } 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) - 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, struct recv_frame *precv_frame) -{ - unsigned char pwrbit; - u8 *ptr = precv_frame->rx_data; - struct rx_pkt_attrib *pattrib = &precv_frame->attrib; - struct sta_priv *pstapriv = &padapter->stapriv; - struct sta_info *psta = NULL; - - psta = rtw_get_stainfo(pstapriv, pattrib->src); - - pwrbit = GetPwrMgt(ptr); - - if (psta) { - if (pwrbit) { - if (!(psta->state & WIFI_SLEEP_STATE)) - stop_sta_xmit(padapter, psta); - } else { - if (psta->state & WIFI_SLEEP_STATE) - wakeup_sta_to_xmit(padapter, psta); - } - } -} - -static void process_wmmps_data(struct adapter *padapter, struct recv_frame *precv_frame) -{ - 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); - } - } - } -} - -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 = 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->psta; - - if (psta) { - pstats = &psta->sta_stats; - - pstats->rx_data_pkts++; - pstats->rx_bytes += sz; - } -} - -static 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; - bool bmcast = is_multicast_ether_addr(pattrib->dst); - - if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) || - check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) { - /* 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 (!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)) { - 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_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)) { - 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) - goto exit; - -exit: - - return ret; -} - -static int ap2sta_data_frame( - struct adapter *adapter, - struct recv_frame *precv_frame, - struct sta_info **psta) -{ - u8 *ptr = precv_frame->rx_data; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)precv_frame->rx_data; - struct rx_pkt_attrib *pattrib = &precv_frame->attrib; - int ret = _SUCCESS; - struct sta_priv *pstapriv = &adapter->stapriv; - struct mlme_priv *pmlmepriv = &adapter->mlmepriv; - u8 *mybssid = get_bssid(pmlmepriv); - u8 *myhwaddr = myid(&adapter->eeprompriv); - bool bmcast = is_multicast_ether_addr(pattrib->dst); - - if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) && - (check_fwstate(pmlmepriv, _FW_LINKED) || - check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) { - /* 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 (ieee80211_is_nullfunc(hdr->frame_control)) { - /* We count the nullfunc frame, but we'll not pass it on to higher layers. */ - count_rx_stats(adapter, precv_frame, *psta); - ret = RTW_RX_HANDLED; - goto exit; - } - } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) && - check_fwstate(pmlmepriv, _FW_LINKED)) { - memcpy(pattrib->src, GetAddr2Ptr(ptr), 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)) { - /* 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) - issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); - } - - ret = _FAIL; - } - -exit: - - return ret; -} - -static int sta2ap_data_frame(struct adapter *adapter, - struct recv_frame *precv_frame, - struct sta_info **psta) -{ - struct rx_pkt_attrib *pattrib = &precv_frame->attrib; - struct sta_priv *pstapriv = &adapter->stapriv; - struct mlme_priv *pmlmepriv = &adapter->mlmepriv; - u8 *ptr = precv_frame->rx_data; - __le16 fc = *(__le16 *)ptr; - unsigned char *mybssid = get_bssid(pmlmepriv); - int ret = _SUCCESS; - - if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { - /* 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 (ieee80211_is_data_qos(fc)) - 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 void validate_recv_ctrl_frame(struct adapter *padapter, - struct recv_frame *precv_frame) -{ - struct rx_pkt_attrib *pattrib = &precv_frame->attrib; - struct sta_priv *pstapriv = &padapter->stapriv; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)precv_frame->rx_data; - struct ieee80211_pspoll *pspoll = (struct ieee80211_pspoll *)hdr; - u8 wmmps_ac; - struct sta_info *psta; - - /* receive the frames that ra(a1) is my address */ - if (memcmp(hdr->addr1, myid(&padapter->eeprompriv), ETH_ALEN)) - return; - - /* only handle ps-poll */ - if (!ieee80211_is_pspoll(hdr->frame_control)) - return; - - psta = rtw_get_stainfo(pstapriv, hdr->addr2); - if (!psta || psta->aid != (le16_to_cpu(pspoll->aid) & 0x3FFF)) - return; - - /* 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; - - 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(&pxmitpriv->lock); - - xmitframe_phead = get_list_head(&psta->sleep_q); - xmitframe_plist = xmitframe_phead->next; - - if (xmitframe_phead != xmitframe_plist) { - pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list); - - xmitframe_plist = xmitframe_plist->next; - - list_del_init(&pxmitframe->list); - - psta->sleepq_len--; - - if (psta->sleepq_len > 0) - pxmitframe->attrib.mdata = 1; - else - pxmitframe->attrib.mdata = 0; - - pxmitframe->attrib.triggered = 1; - - 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) - /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */ - issue_nulldata(padapter, psta->hwaddr, 0, 0, 0); - else - 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(&pxmitpriv->lock); - } -} - -struct recv_frame *recvframe_chk_defrag(struct adapter *padapter, struct recv_frame *precv_frame); - -static void validate_recv_mgnt_frame(struct adapter *padapter, - struct recv_frame *precv_frame) -{ - struct sta_info *psta; - struct ieee80211_hdr *hdr; - - precv_frame = recvframe_chk_defrag(padapter, precv_frame); - if (!precv_frame) - return; - - hdr = (struct ieee80211_hdr *)precv_frame->rx_data; - psta = rtw_get_stainfo(&padapter->stapriv, hdr->addr2); - if (psta) { - psta->sta_stats.rx_mgnt_pkts++; - if (ieee80211_is_beacon(hdr->frame_control)) - psta->sta_stats.rx_beacon_pkts++; - else if (ieee80211_is_probe_req(hdr->frame_control)) - psta->sta_stats.rx_probereq_pkts++; - else if (ieee80211_is_probe_resp(hdr->frame_control)) { - if (!memcmp(padapter->eeprompriv.mac_addr, hdr->addr1, ETH_ALEN)) - psta->sta_stats.rx_probersp_pkts++; - else if (is_broadcast_mac_addr(hdr->addr1) || is_multicast_mac_addr(hdr->addr1)) - psta->sta_stats.rx_probersp_bm_pkts++; - else - psta->sta_stats.rx_probersp_uo_pkts++; - } - } - - mgt_dispatcher(padapter, precv_frame); -} - -static int validate_recv_data_frame(struct adapter *adapter, - struct recv_frame *precv_frame) -{ - struct sta_info *psta = NULL; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)precv_frame->rx_data; - struct rx_pkt_attrib *pattrib = &precv_frame->attrib; - struct security_priv *psecuritypriv = &adapter->securitypriv; - int ret; - - memcpy(pattrib->dst, ieee80211_get_DA(hdr), ETH_ALEN); - memcpy(pattrib->src, ieee80211_get_SA(hdr), ETH_ALEN); - - /* address4 is used only if both to_ds and from_ds are set */ - if (ieee80211_has_a4(hdr->frame_control)) - return _FAIL; - - memcpy(pattrib->ra, hdr->addr1, ETH_ALEN); - memcpy(pattrib->ta, hdr->addr2, ETH_ALEN); - - if (ieee80211_has_fromds(hdr->frame_control)) { - memcpy(pattrib->bssid, hdr->addr2, ETH_ALEN); - ret = ap2sta_data_frame(adapter, precv_frame, &psta); - } else if (ieee80211_has_tods(hdr->frame_control)) { - memcpy(pattrib->bssid, hdr->addr1, ETH_ALEN); - ret = sta2ap_data_frame(adapter, precv_frame, &psta); - } else { - memcpy(pattrib->bssid, hdr->addr3, ETH_ALEN); - ret = sta2sta_data_frame(adapter, precv_frame, &psta); - } - - if (ret == _FAIL || ret == RTW_RX_HANDLED) - return ret; - - if (!psta) - return _FAIL; - - precv_frame->psta = psta; - - pattrib->amsdu = 0; - pattrib->ack_policy = 0; - /* parsing QC field */ - if (pattrib->qos) { - struct ieee80211_qos_hdr *qos_hdr = (struct ieee80211_qos_hdr *)hdr; - - pattrib->priority = ieee80211_get_tid(hdr); - pattrib->ack_policy = GetAckpolicy(&qos_hdr->qos_ctrl); - pattrib->amsdu = GetAMsdu(&qos_hdr->qos_ctrl); - pattrib->hdrlen = sizeof(*qos_hdr); - - if (pattrib->priority != 0 && pattrib->priority != 3) - adapter->recvpriv.bIsAnyNonBEPkts = true; - } else { - pattrib->priority = 0; - pattrib->hdrlen = 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, ieee80211_has_retry(hdr->frame_control), - &psta->sta_recvpriv.rxcache) == _FAIL) - return _FAIL; - - 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 = 0; - pattrib->icv_len = 0; - } - - return _SUCCESS; -} - -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. */ - - int retval = _FAIL; - struct rx_pkt_attrib *pattrib = &precv_frame->attrib; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)precv_frame->rx_data; - 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++; - } - - if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_VERS)) != 0) - return _FAIL; - - pattrib->frag_num = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; - pattrib->seq_num = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); - - pattrib->pw_save = ieee80211_has_pm(hdr->frame_control); - pattrib->mfrag = ieee80211_has_morefrags(hdr->frame_control); - pattrib->mdata = ieee80211_has_moredata(hdr->frame_control); - pattrib->privacy = ieee80211_has_protected(hdr->frame_control); - pattrib->order = ieee80211_has_order(hdr->frame_control); - - /* We return _SUCCESS only for data frames. */ - if (ieee80211_is_mgmt(hdr->frame_control)) - validate_recv_mgnt_frame(adapter, precv_frame); - else if (ieee80211_is_ctl(hdr->frame_control)) - validate_recv_ctrl_frame(adapter, precv_frame); - else if (ieee80211_is_data(hdr->frame_control)) { - rtw_led_control(adapter, LED_CTL_RX); - pattrib->qos = ieee80211_is_data_qos(hdr->frame_control); - retval = validate_recv_data_frame(adapter, precv_frame); - if (retval == _FAIL) { - struct recv_priv *precvpriv = &adapter->recvpriv; - - precvpriv->rx_drop++; - } - } - - 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; - - int ret = _SUCCESS; - struct adapter *adapter = precvframe->adapter; - struct mlme_priv *pmlmepriv = &adapter->mlmepriv; - - u8 *ptr = precvframe->rx_data; /* point to frame_ctrl field */ - struct rx_pkt_attrib *pattrib = &precvframe->attrib; - - if (pattrib->encrypt) - recvframe_pull_tail(precvframe, pattrib->icv_len); - - psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen + pattrib->iv_len); - psnap_type = ptr + pattrib->hdrlen + pattrib->iv_len + SNAP_SIZE; - /* convert hdr + possible LLC headers into Ethernet header */ - if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) && - memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) && - memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2)) || - !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) { - /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */ - bsnaphdr = true; - } else { - /* Leave Ethernet header part of hdr and full payload */ - bsnaphdr = false; - } - - rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0); - len = precvframe->len - rmv_len; - - memcpy(&be_tmp, ptr + rmv_len, 2); - eth_type = ntohs(be_tmp); /* pattrib->ether_type */ - pattrib->eth_type = eth_type; - - if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) { - ptr += rmv_len; - *ptr = 0x87; - *(ptr + 1) = 0x12; - - eth_type = 0x8712; - /* append rx status for mp test packets */ - ptr = recvframe_pull(precvframe, (rmv_len - sizeof(struct ethhdr) + 2) - 24); - 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 ret; -} - -/* perform defrag */ -static struct recv_frame *recvframe_defrag(struct adapter *adapter, struct __queue *defrag_q) -{ - struct list_head *plist, *phead; - u8 wlanhdr_offset; - u8 curfragnum; - struct recv_frame *pfhdr, *pnfhdr; - struct recv_frame *prframe, *pnextrframe; - struct __queue *pfree_recv_queue; - - curfragnum = 0; - pfree_recv_queue = &adapter->recvpriv.free_recv_queue; - - phead = get_list_head(defrag_q); - plist = phead->next; - pfhdr = container_of(plist, struct recv_frame, list); - prframe = (struct recv_frame *)pfhdr; - list_del_init(&prframe->list); - - if (curfragnum != pfhdr->attrib.frag_num) { - /* the first fragment number must be 0 */ - /* free the whole queue */ - rtw_free_recvframe(prframe, pfree_recv_queue); - rtw_free_recvframe_queue(defrag_q, pfree_recv_queue); - - return NULL; - } - - curfragnum++; - - plist = get_list_head(defrag_q); - plist = phead->next; - pfhdr = container_of(plist, struct recv_frame, list); - prframe = (struct recv_frame *)pfhdr; - list_del_init(&prframe->list); - - plist = plist->next; - - while (phead != plist) { - pnfhdr = container_of(plist, struct recv_frame, list); - pnextrframe = (struct recv_frame *)pnfhdr; - - /* check the fragment sequence (2nd ~n fragment frame) */ - - if (curfragnum != pnfhdr->attrib.frag_num) { - /* the fragment number must be increasing (after decache) */ - /* release the defrag_q & prframe */ - rtw_free_recvframe(prframe, pfree_recv_queue); - rtw_free_recvframe_queue(defrag_q, pfree_recv_queue); - return NULL; - } - - curfragnum++; - - /* copy the 2nd~n fragment frame's payload to the first fragment */ - /* get the 2nd~last fragment frame's payload */ - - wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len; - - recvframe_pull(pnextrframe, wlanhdr_offset); - - /* append to first fragment frame's tail (if privacy frame, pull the ICV) */ - recvframe_pull_tail(prframe, pfhdr->attrib.icv_len); - - /* memcpy */ - memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len); - - recvframe_put(prframe, pnfhdr->len); - - pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len; - plist = plist->next; - } - - /* free the defrag_q queue and return the prframe */ - rtw_free_recvframe_queue(defrag_q, pfree_recv_queue); - - 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) { - __le16 fc = *(__le16 *)pfhdr->rx_data; - - if (ieee80211_is_data(fc)) { - 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); - - prtnframe = NULL; - } else { - /* can't find this ta's defrag_queue, so free this recv_frame */ - if (precv_frame && pfree_recv_queue) - 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) { - phead = get_list_head(pdefrag_q); - list_add_tail(&pfhdr->list, phead); - - /* 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 */ - if (precv_frame && pfree_recv_queue) - rtw_free_recvframe(precv_frame, pfree_recv_queue); - prtnframe = NULL; - } - } - - if (prtnframe && prtnframe->attrib.privacy) { - /* after defrag we must check tkip mic code */ - if (recvframe_chkmic(padapter, prtnframe) == _FAIL) { - if (precv_frame && pfree_recv_queue) - 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; - - recvframe_pull(prframe, prframe->attrib.hdrlen); - - if (prframe->attrib.iv_len > 0) - recvframe_pull(prframe, prframe->attrib.iv_len); - - a_len = prframe->len; - - pdata = prframe->rx_data; - - while (a_len > ETH_HLEN) { - /* Offset 12 denote 2 mac address */ - nSubframe_Length = RTW_GET_BE16(pdata + 12); - - if (a_len < ETH_HLEN + 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 { - break; - } - } - - subframes[nr_subframes++] = sub_skb; - - 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) - 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 = RTW_GET_BE16(&sub_skb->data[6]); - if (sub_skb->len >= 8 && - ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) && - eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) || - !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) { - /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */ - skb_pull(sub_skb, SNAP_SIZE); - memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN); - memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN); - } else { - __be16 len; - /* Leave Ethernet header part of hdr and full payload */ - len = htons(sub_skb->len); - memcpy(skb_push(sub_skb, 2), &len, 2); - memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN); - memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN); - } - - /* Indicate the packets to upper layer */ - /* Insert NAT2.5 RX here! */ - sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev); - sub_skb->dev = padapter->pnetdev; - - sub_skb->ip_summed = CHECKSUM_NONE; - - netif_rx(sub_skb); - } - -exit: - - prframe->len = 0; - rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */ - - return _SUCCESS; -} - -static bool 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 bool enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl, struct recv_frame *prframe) -{ - struct rx_pkt_attrib *pattrib = &prframe->attrib; - struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue; - struct list_head *phead, *plist; - struct recv_frame *hdr; - struct rx_pkt_attrib *pnextattrib; - - phead = get_list_head(ppending_recvframe_queue); - plist = phead->next; - - while (phead != plist) { - hdr = container_of(plist, struct recv_frame, list); - pnextattrib = &hdr->attrib; - - if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num)) - plist = plist->next; - else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num)) - return false; - else - break; - } - - list_del_init(&prframe->list); - - list_add_tail(&prframe->list, plist); - return true; -} - -static int rtw_recv_indicatepkt(struct adapter *padapter, struct recv_frame *precv_frame) -{ - struct recv_priv *precvpriv; - struct __queue *pfree_recv_queue; - struct sk_buff *skb; - struct mlme_priv *pmlmepriv = &padapter->mlmepriv; - - precvpriv = &padapter->recvpriv; - pfree_recv_queue = &precvpriv->free_recv_queue; - - skb = precv_frame->pkt; - if (!skb) - goto _recv_indicatepkt_drop; - - skb->data = precv_frame->rx_data; - - skb_set_tail_pointer(skb, precv_frame->len); - - skb->len = precv_frame->len; - - if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { - struct sk_buff *pskb2 = NULL; - struct sta_info *psta = NULL; - struct sta_priv *pstapriv = &padapter->stapriv; - struct rx_pkt_attrib *pattrib = &precv_frame->attrib; - bool bmcast = is_multicast_ether_addr(pattrib->dst); - - if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)) { - if (bmcast) { - psta = rtw_get_bcmc_stainfo(padapter); - pskb2 = skb_clone(skb, GFP_ATOMIC); - } else { - psta = rtw_get_stainfo(pstapriv, pattrib->dst); - } - - if (psta) { - struct net_device *pnetdev; - - pnetdev = (struct net_device *)padapter->pnetdev; - skb->dev = pnetdev; - skb_set_queue_mapping(skb, rtw_recv_select_queue(skb)); - - rtw_xmit_entry(skb, pnetdev); - - if (bmcast) - skb = pskb2; - else - goto _recv_indicatepkt_end; - } - } - } - - rcu_read_lock(); - rcu_dereference(padapter->pnetdev->rx_handler_data); - rcu_read_unlock(); - - skb->ip_summed = CHECKSUM_NONE; - skb->dev = padapter->pnetdev; - skb->protocol = eth_type_trans(skb, padapter->pnetdev); - - netif_rx(skb); - -_recv_indicatepkt_end: - - /* pointers to NULL before rtw_free_recvframe() */ - precv_frame->pkt = NULL; - - rtw_free_recvframe(precv_frame, pfree_recv_queue); - - return _SUCCESS; - -_recv_indicatepkt_drop: - - /* enqueue back to free_recv_queue */ - rtw_free_recvframe(precv_frame, pfree_recv_queue); - - return _FAIL; -} - -static bool 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 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; - - prframe = container_of(plist, struct recv_frame, list); - pattrib = &prframe->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)) { - prframe = container_of(plist, struct recv_frame, list); - pattrib = &prframe->attrib; - - if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) { - 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) { - if (!padapter->bDriverStopped && - !padapter->bSurpriseRemoved) { - 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); - - /* s2. check if winstart_b(indicate_seq) needs to been updated */ - if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) - goto _err_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)) { - _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); - _cancel_timer_ex(&preorder_ctrl->reordering_ctrl_timer); - } - - return _SUCCESS; - -_err_exit: - - spin_unlock_bh(&ppending_recvframe_queue->lock); - - return _FAIL; -} - -void rtw_reordering_ctrl_timeout_handler(void *pcontext) -{ - struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)pcontext; - 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)) - _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, struct recv_frame *prframe) -{ - int retval = _SUCCESS; - /* struct recv_priv *precvpriv = &padapter->recvpriv; */ - /* struct rx_pkt_attrib *pattrib = &prframe->attrib; */ - struct mlme_priv *pmlmepriv = &padapter->mlmepriv; - struct ht_priv *phtpriv = &pmlmepriv->htpriv; - - if (phtpriv->ht_option) { /* B/G/N Mode */ - /* prframe->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) && - (!padapter->bSurpriseRemoved)) { - retval = _FAIL; - return retval; - } - } - } else { /* B/G mode */ - retval = wlanhdr_to_ethhdr(prframe); - if (retval != _SUCCESS) - return retval; - - if ((!padapter->bDriverStopped) && - (!padapter->bSurpriseRemoved)) { - /* indicate this recv_frame */ - rtw_recv_indicatepkt(padapter, prframe); - } else { - 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) - rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */ - - return ret; -} - -static int recv_func_posthandle(struct adapter *padapter, struct recv_frame *prframe) -{ - int ret = _SUCCESS; - struct recv_frame *orig_prframe = prframe; - struct recv_priv *precvpriv = &padapter->recvpriv; - struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue; - - /* DATA FRAME */ - rtw_led_control(padapter, LED_CTL_RX); - - prframe = decryptor(padapter, prframe); - if (!prframe) { - 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; - } - 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; - struct recv_priv *recvpriv = &padapter->recvpriv; - - /* 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))) - 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) && - 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(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) - 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 (adapter->recvpriv.is_signal_dbg) { - /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */ - adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg; - adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg); - } else { - if (recvpriv->signal_strength_data.update_req == 0) {/* update_req is clear, means we got rx */ - avg_signal_strength = recvpriv->signal_strength_data.avg_val; - /* after avg_vals are acquired, we can re-stat the signal values */ - recvpriv->signal_strength_data.update_req = 1; - } - - if (recvpriv->signal_qual_data.update_req == 0) {/* update_req is clear, means we got rx */ - avg_signal_qual = recvpriv->signal_qual_data.avg_val; - /* after avg_vals are acquired, we can re-stat the signal values */ - recvpriv->signal_qual_data.update_req = 1; - } - - /* update value of signal_strength, rssi, signal_qual */ - if (!check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY)) { - tmp_s = (avg_signal_strength + (_alpha - 1) * recvpriv->signal_strength); - if (tmp_s % _alpha) - tmp_s = tmp_s / _alpha + 1; - else - tmp_s = tmp_s / _alpha; - if (tmp_s > 100) - tmp_s = 100; - - tmp_q = (avg_signal_qual + (_alpha - 1) * recvpriv->signal_qual); - if (tmp_q % _alpha) - tmp_q = tmp_q / _alpha + 1; - else - tmp_q = tmp_q / _alpha; - if (tmp_q > 100) - tmp_q = 100; - - recvpriv->signal_strength = tmp_s; - recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s); - recvpriv->signal_qual = tmp_q; - } - } - rtw_set_signal_stat_timer(recvpriv); -} |