// SPDX-License-Identifier: GPL-2.0 /****************************************************************************** * * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved. * ******************************************************************************/ #include #include #include #include #include #include static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37}; static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3}; static void rtw_signal_stat_timer_hdl(struct timer_list *t); void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv) { memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv)); spin_lock_init(&psta_recvpriv->lock); /* for (i = 0; iblk_strms[i]); */ INIT_LIST_HEAD(&psta_recvpriv->defrag_q.queue); spin_lock_init(&psta_recvpriv->defrag_q.lock); } signed int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter) { signed int i; union recv_frame *precvframe; signed int res = _SUCCESS; spin_lock_init(&precvpriv->lock); INIT_LIST_HEAD(&precvpriv->free_recv_queue.queue); spin_lock_init(&precvpriv->free_recv_queue.lock); INIT_LIST_HEAD(&precvpriv->recv_pending_queue.queue); spin_lock_init(&precvpriv->recv_pending_queue.lock); INIT_LIST_HEAD(&precvpriv->uc_swdec_pending_queue.queue); spin_lock_init(&precvpriv->uc_swdec_pending_queue.lock); precvpriv->adapter = padapter; precvpriv->free_recvframe_cnt = NR_RECVFRAME; precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(union recv_frame) + RXFRAME_ALIGN_SZ); if (!precvpriv->pallocated_frame_buf) { res = _FAIL; goto exit; } precvpriv->precv_frame_buf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ); /* precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf + RXFRAME_ALIGN_SZ - */ /* ((SIZE_PTR) (precvpriv->pallocated_frame_buf) &(RXFRAME_ALIGN_SZ-1)); */ precvframe = (union recv_frame *) precvpriv->precv_frame_buf; for (i = 0; i < NR_RECVFRAME; i++) { INIT_LIST_HEAD(&(precvframe->u.list)); list_add_tail(&(precvframe->u.list), &(precvpriv->free_recv_queue.queue)); rtw_os_recv_resource_alloc(padapter, precvframe); precvframe->u.hdr.len = 0; precvframe->u.hdr.adapter = padapter; precvframe++; } res = rtw_hal_init_recv_priv(padapter); timer_setup(&precvpriv->signal_stat_timer, rtw_signal_stat_timer_hdl, 0); precvpriv->signal_stat_sampling_interval = 2000; /* ms */ rtw_set_signal_stat_timer(precvpriv); exit: return res; } void _rtw_free_recv_priv(struct recv_priv *precvpriv) { struct adapter *padapter = precvpriv->adapter; rtw_free_uc_swdec_pending_queue(padapter); rtw_os_recv_resource_free(precvpriv); vfree(precvpriv->pallocated_frame_buf); rtw_hal_free_recv_priv(padapter); } union recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue) { union recv_frame *precvframe; struct list_head *plist, *phead; struct adapter *padapter; struct recv_priv *precvpriv; if (list_empty(&pfree_recv_queue->queue)) precvframe = NULL; else { phead = get_list_head(pfree_recv_queue); plist = get_next(phead); precvframe = (union recv_frame *)plist; list_del_init(&precvframe->u.hdr.list); padapter = precvframe->u.hdr.adapter; if (padapter) { precvpriv = &padapter->recvpriv; if (pfree_recv_queue == &precvpriv->free_recv_queue) precvpriv->free_recvframe_cnt--; } } return precvframe; } union recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue) { union recv_frame *precvframe; spin_lock_bh(&pfree_recv_queue->lock); precvframe = _rtw_alloc_recvframe(pfree_recv_queue); spin_unlock_bh(&pfree_recv_queue->lock); return precvframe; } int rtw_free_recvframe(union recv_frame *precvframe, struct __queue *pfree_recv_queue) { struct adapter *padapter = precvframe->u.hdr.adapter; struct recv_priv *precvpriv = &padapter->recvpriv; rtw_os_free_recvframe(precvframe); spin_lock_bh(&pfree_recv_queue->lock); list_del_init(&(precvframe->u.hdr.list)); precvframe->u.hdr.len = 0; list_add_tail(&(precvframe->u.hdr.list), get_list_head(pfree_recv_queue)); if (padapter) { if (pfree_recv_queue == &precvpriv->free_recv_queue) precvpriv->free_recvframe_cnt++; } spin_unlock_bh(&pfree_recv_queue->lock); return _SUCCESS; } signed int _rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue) { struct adapter *padapter = precvframe->u.hdr.adapter; struct recv_priv *precvpriv = &padapter->recvpriv; /* INIT_LIST_HEAD(&(precvframe->u.hdr.list)); */ list_del_init(&(precvframe->u.hdr.list)); list_add_tail(&(precvframe->u.hdr.list), get_list_head(queue)); if (padapter) if (queue == &precvpriv->free_recv_queue) precvpriv->free_recvframe_cnt++; return _SUCCESS; } signed int rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue) { signed int ret; /* _spinlock(&pfree_recv_queue->lock); */ spin_lock_bh(&queue->lock); ret = _rtw_enqueue_recvframe(precvframe, queue); /* spin_unlock(&pfree_recv_queue->lock); */ spin_unlock_bh(&queue->lock); return ret; } /* signed int rtw_enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue) { return rtw_free_recvframe(precvframe, queue); } */ /* caller : defrag ; recvframe_chk_defrag in recv_thread (passive) pframequeue: defrag_queue : will be accessed in recv_thread (passive) using spinlock to protect */ void rtw_free_recvframe_queue(struct __queue *pframequeue, struct __queue *pfree_recv_queue) { union recv_frame *precvframe; struct list_head *plist, *phead; spin_lock(&pframequeue->lock); phead = get_list_head(pframequeue); plist = get_next(phead); while (phead != plist) { precvframe = (union recv_frame *)plist; plist = get_next(plist); rtw_free_recvframe(precvframe, pfree_recv_queue); } spin_unlock(&pframequeue->lock); } u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter) { u32 cnt = 0; union recv_frame *pending_frame; while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) { rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue); cnt++; } return cnt; } signed int rtw_enqueue_recvbuf_to_head(struct recv_buf *precvbuf, struct __queue *queue) { spin_lock_bh(&queue->lock); list_del_init(&precvbuf->list); list_add(&precvbuf->list, get_list_head(queue)); spin_unlock_bh(&queue->lock); return _SUCCESS; } signed int rtw_enqueue_recvbuf(struct recv_buf *precvbuf, struct __queue *queue) { spin_lock_bh(&queue->lock); list_del_init(&precvbuf->list); list_add_tail(&precvbuf->list, get_list_head(queue)); spin_unlock_bh(&queue->lock); return _SUCCESS; } struct recv_buf *rtw_dequeue_recvbuf(struct __queue *queue) { struct recv_buf *precvbuf; struct list_head *plist, *phead; spin_lock_bh(&queue->lock); if (list_empty(&queue->queue)) precvbuf = NULL; else { phead = get_list_head(queue); plist = get_next(phead); precvbuf = container_of(plist, struct recv_buf, list); list_del_init(&precvbuf->list); } spin_unlock_bh(&queue->lock); return precvbuf; } static signed int recvframe_chkmic(struct adapter *adapter, union recv_frame *precvframe) { signed int i, res = _SUCCESS; u32 datalen; u8 miccode[8]; u8 bmic_err = false, brpt_micerror = true; u8 *pframe, *payload, *pframemic; u8 *mickey; /* u8 *iv, rxdata_key_idx = 0; */ struct sta_info *stainfo; struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib; struct security_priv *psecuritypriv = &adapter->securitypriv; struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv; struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info); stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]); if (prxattrib->encrypt == _TKIP_) { /* calculate mic code */ if (stainfo) { if (IS_MCAST(prxattrib->ra)) { /* mickey =&psecuritypriv->dot118021XGrprxmickey.skey[0]; */ /* iv = precvframe->u.hdr.rx_data+prxattrib->hdrlen; */ /* rxdata_key_idx =(((iv[3])>>6)&0x3) ; */ mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0]; /* psecuritypriv->dot118021XGrpKeyid, pmlmeinfo->key_index, rxdata_key_idx); */ if (psecuritypriv->binstallGrpkey == false) { res = _FAIL; goto exit; } } else { mickey = &stainfo->dot11tkiprxmickey.skey[0]; } datalen = precvframe->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len-prxattrib->icv_len-8;/* icv_len included the mic code */ pframe = precvframe->u.hdr.rx_data; payload = pframe+prxattrib->hdrlen+prxattrib->iv_len; rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0], (unsigned char)prxattrib->priority); /* care the length of the data */ pframemic = payload+datalen; bmic_err = false; for (i = 0; i < 8; i++) { if (miccode[i] != *(pframemic + i)) bmic_err = true; } if (bmic_err == true) { /* double check key_index for some timing issue , */ /* cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */ if ((IS_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)); res = _FAIL; } else { /* mic checked ok */ if (!psecuritypriv->bcheck_grpkey && IS_MCAST(prxattrib->ra)) psecuritypriv->bcheck_grpkey = true; } } recvframe_pull_tail(precvframe, 8); } exit: return res; } /* decrypt and set the ivlen, icvlen of the recv_frame */ static union recv_frame *decryptor(struct adapter *padapter, union recv_frame *precv_frame) { struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib; struct security_priv *psecuritypriv = &padapter->securitypriv; union recv_frame *return_packet = precv_frame; u32 res = _SUCCESS; if (prxattrib->encrypt > 0) { u8 *iv = precv_frame->u.hdr.rx_data+prxattrib->hdrlen; prxattrib->key_index = (((iv[3])>>6)&0x3); if (prxattrib->key_index > WEP_KEYS) { switch (prxattrib->encrypt) { case _WEP40_: case _WEP104_: prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex; break; case _TKIP_: case _AES_: default: prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid; break; } } } if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt == true))) { psecuritypriv->hw_decrypted = false; switch (prxattrib->encrypt) { case _WEP40_: case _WEP104_: rtw_wep_decrypt(padapter, (u8 *)precv_frame); break; case _TKIP_: res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame); break; case _AES_: res = rtw_aes_decrypt(padapter, (u8 *)precv_frame); break; default: break; } } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 && (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_) ) { psecuritypriv->hw_decrypted = true; } else { } if (res == _FAIL) { rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue); return_packet = NULL; } else prxattrib->bdecrypted = true; return return_packet; } /* set the security information in the recv_frame */ static union recv_frame *portctrl(struct adapter *adapter, union recv_frame *precv_frame) { u8 *psta_addr = NULL; u8 *ptr; uint auth_alg; struct recv_frame_hdr *pfhdr; struct sta_info *psta; struct sta_priv *pstapriv; union recv_frame *prtnframe; u16 ether_type = 0; u16 eapol_type = 0x888e;/* for Funia BD's WPA issue */ struct rx_pkt_attrib *pattrib; pstapriv = &adapter->stapriv; auth_alg = adapter->securitypriv.dot11AuthAlgrthm; ptr = get_recvframe_data(precv_frame); pfhdr = &precv_frame->u.hdr; pattrib = &pfhdr->attrib; psta_addr = pattrib->ta; prtnframe = NULL; psta = rtw_get_stainfo(pstapriv, psta_addr); if (auth_alg == 2) { if ((psta) && (psta->ieee8021x_blocked)) { __be16 be_tmp; /* blocked */ /* only accept EAPOL frame */ prtnframe = precv_frame; /* get ether_type */ ptr = ptr + pfhdr->attrib.hdrlen + pfhdr->attrib.iv_len + LLC_HEADER_LENGTH; memcpy(&be_tmp, ptr, 2); ether_type = ntohs(be_tmp); if (ether_type == eapol_type) prtnframe = precv_frame; else { /* free this frame */ rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue); prtnframe = NULL; } } else { /* allowed */ /* check decryption status, and decrypt the frame if needed */ prtnframe = precv_frame; /* check is the EAPOL frame or not (Rekey) */ /* if (ether_type == eapol_type) { */ /* check Rekey */ /* prtnframe =precv_frame; */ /* */ /* else { */ /* */ } } else prtnframe = precv_frame; return prtnframe; } static signed int recv_decache(union recv_frame *precv_frame, u8 bretry, struct stainfo_rxcache *prxcache) { signed int tid = precv_frame->u.hdr.attrib.priority; u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num&0xffff) << 4) | (precv_frame->u.hdr.attrib.frag_num & 0xf); if (tid > 15) return _FAIL; if (1) { /* if (bretry) */ if (seq_ctrl == prxcache->tid_rxseq[tid]) return _FAIL; } prxcache->tid_rxseq[tid] = seq_ctrl; return _SUCCESS; } static void process_pwrbit_data(struct adapter *padapter, union recv_frame *precv_frame) { unsigned char pwrbit; u8 *ptr = precv_frame->u.hdr.rx_data; struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; struct sta_priv *pstapriv = &padapter->stapriv; struct sta_info *psta = NULL; psta = rtw_get_stainfo(pstapriv, pattrib->src); pwrbit = GetPwrMgt(ptr); if (psta) { if (pwrbit) { if (!(psta->state & WIFI_SLEEP_STATE)) { /* psta->state |= WIFI_SLEEP_STATE; */ /* pstapriv->sta_dz_bitmap |= BIT(psta->aid); */ stop_sta_xmit(padapter, psta); } } else { if (psta->state & WIFI_SLEEP_STATE) { /* psta->state ^= WIFI_SLEEP_STATE; */ /* pstapriv->sta_dz_bitmap &= ~BIT(psta->aid); */ wakeup_sta_to_xmit(padapter, psta); } } } } static void process_wmmps_data(struct adapter *padapter, union recv_frame *precv_frame) { struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; struct sta_priv *pstapriv = &padapter->stapriv; struct sta_info *psta = NULL; psta = rtw_get_stainfo(pstapriv, pattrib->src); if (!psta) return; if (!psta->qos_option) return; if (!(psta->qos_info&0xf)) return; if (psta->state&WIFI_SLEEP_STATE) { u8 wmmps_ac = 0; switch (pattrib->priority) { case 1: case 2: wmmps_ac = psta->uapsd_bk&BIT(1); break; case 4: case 5: wmmps_ac = psta->uapsd_vi&BIT(1); break; case 6: case 7: wmmps_ac = psta->uapsd_vo&BIT(1); break; case 0: case 3: default: wmmps_ac = psta->uapsd_be&BIT(1); break; } if (wmmps_ac) { if (psta->sleepq_ac_len > 0) /* process received triggered frame */ xmit_delivery_enabled_frames(padapter, psta); else /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */ issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0); } } } static void count_rx_stats(struct adapter *padapter, union recv_frame *prframe, struct sta_info *sta) { int sz; struct sta_info *psta = NULL; struct stainfo_stats *pstats = NULL; struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; struct recv_priv *precvpriv = &padapter->recvpriv; sz = get_recvframe_len(prframe); precvpriv->rx_bytes += sz; padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++; if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst))) padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++; if (sta) psta = sta; else psta = prframe->u.hdr.psta; if (psta) { pstats = &psta->sta_stats; pstats->rx_data_pkts++; pstats->rx_bytes += sz; } traffic_check_for_leave_lps(padapter, false, 0); } static signed int sta2sta_data_frame(struct adapter *adapter, union recv_frame *precv_frame, struct sta_info **psta) { u8 *ptr = precv_frame->u.hdr.rx_data; signed int ret = _SUCCESS; struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; struct sta_priv *pstapriv = &adapter->stapriv; struct mlme_priv *pmlmepriv = &adapter->mlmepriv; u8 *mybssid = get_bssid(pmlmepriv); u8 *myhwaddr = myid(&adapter->eeprompriv); u8 *sta_addr = NULL; signed int bmcast = IS_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)) { 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) == true) { /* For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */ if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) { ret = _FAIL; goto exit; } sta_addr = pattrib->bssid; } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) { if (bmcast) { /* For AP mode, if DA == MCAST, then BSSID should be also MCAST */ if (!IS_MCAST(pattrib->bssid)) { ret = _FAIL; goto exit; } } else { /* not mc-frame */ /* For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */ if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) { ret = _FAIL; goto exit; } sta_addr = pattrib->src; } } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) { memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN); memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN); memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN); memcpy(pattrib->ra, pattrib->dst, ETH_ALEN); memcpy(pattrib->ta, pattrib->src, ETH_ALEN); sta_addr = mybssid; } else ret = _FAIL; if (bmcast) *psta = rtw_get_bcmc_stainfo(adapter); else *psta = rtw_get_stainfo(pstapriv, sta_addr); /* get ap_info */ if (!*psta) { ret = _FAIL; goto exit; } exit: return ret; } static signed int ap2sta_data_frame(struct adapter *adapter, union recv_frame *precv_frame, struct sta_info **psta) { u8 *ptr = precv_frame->u.hdr.rx_data; struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; signed int ret = _SUCCESS; struct sta_priv *pstapriv = &adapter->stapriv; struct mlme_priv *pmlmepriv = &adapter->mlmepriv; u8 *mybssid = get_bssid(pmlmepriv); u8 *myhwaddr = myid(&adapter->eeprompriv); signed int bmcast = IS_MCAST(pattrib->dst); if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) && (check_fwstate(pmlmepriv, _FW_LINKED) == true || check_fwstate(pmlmepriv, _FW_UNDER_LINKING) == true) ) { /* filter packets that SA is myself or multicast or broadcast */ if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) { ret = _FAIL; goto exit; } /* da should be for me */ if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) { ret = _FAIL; goto exit; } /* check BSSID */ if (!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))) { if (!bmcast) issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); ret = _FAIL; goto exit; } if (bmcast) *psta = rtw_get_bcmc_stainfo(adapter); else *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get ap_info */ if (!*psta) { ret = _FAIL; goto exit; } if (GetFrameSubType(ptr) & BIT(6)) { /* No data, will not indicate to upper layer, temporily count it here */ count_rx_stats(adapter, precv_frame, *psta); ret = RTW_RX_HANDLED; goto exit; } } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) && (check_fwstate(pmlmepriv, _FW_LINKED) == true)) { memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN); memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN); memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN); memcpy(pattrib->ra, pattrib->dst, ETH_ALEN); memcpy(pattrib->ta, pattrib->src, ETH_ALEN); /* */ memcpy(pattrib->bssid, mybssid, ETH_ALEN); *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */ if (!*psta) { ret = _FAIL; goto exit; } } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) { /* Special case */ ret = RTW_RX_HANDLED; goto exit; } else { if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) { *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */ if (!*psta) { /* for AP multicast issue , modify by yiwei */ static unsigned long send_issue_deauth_time; if (jiffies_to_msecs(jiffies - send_issue_deauth_time) > 10000 || send_issue_deauth_time == 0) { send_issue_deauth_time = jiffies; issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); } } } ret = _FAIL; } exit: return ret; } static signed int sta2ap_data_frame(struct adapter *adapter, union recv_frame *precv_frame, struct sta_info **psta) { u8 *ptr = precv_frame->u.hdr.rx_data; struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; struct sta_priv *pstapriv = &adapter->stapriv; struct mlme_priv *pmlmepriv = &adapter->mlmepriv; unsigned char *mybssid = get_bssid(pmlmepriv); signed int ret = _SUCCESS; if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) { /* For AP mode, RA =BSSID, TX =STA(SRC_ADDR), A3 =DST_ADDR */ if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) { ret = _FAIL; goto exit; } *psta = rtw_get_stainfo(pstapriv, pattrib->src); if (!*psta) { issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); ret = RTW_RX_HANDLED; goto exit; } process_pwrbit_data(adapter, precv_frame); if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) process_wmmps_data(adapter, precv_frame); if (GetFrameSubType(ptr) & BIT(6)) { /* No data, will not indicate to upper layer, temporily count it here */ count_rx_stats(adapter, precv_frame, *psta); ret = RTW_RX_HANDLED; goto exit; } } else { u8 *myhwaddr = myid(&adapter->eeprompriv); if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) { ret = RTW_RX_HANDLED; goto exit; } issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA); ret = RTW_RX_HANDLED; goto exit; } exit: return ret; } static signed int validate_recv_ctrl_frame(struct adapter *padapter, union recv_frame *precv_frame) { struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; struct sta_priv *pstapriv = &padapter->stapriv; u8 *pframe = precv_frame->u.hdr.rx_data; struct sta_info *psta = NULL; /* uint len = precv_frame->u.hdr.len; */ if (GetFrameType(pframe) != WIFI_CTRL_TYPE) return _FAIL; /* receive the frames that ra(a1) is my address */ if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN)) return _FAIL; psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe)); if (!psta) return _FAIL; /* for rx pkt statistics */ psta->sta_stats.rx_ctrl_pkts++; /* only handle ps-poll */ if (GetFrameSubType(pframe) == WIFI_PSPOLL) { u16 aid; u8 wmmps_ac = 0; aid = GetAid(pframe); if (psta->aid != aid) return _FAIL; switch (pattrib->priority) { case 1: case 2: wmmps_ac = psta->uapsd_bk&BIT(0); break; case 4: case 5: wmmps_ac = psta->uapsd_vi&BIT(0); break; case 6: case 7: wmmps_ac = psta->uapsd_vo&BIT(0); break; case 0: case 3: default: wmmps_ac = psta->uapsd_be&BIT(0); break; } if (wmmps_ac) return _FAIL; if (psta->state & WIFI_STA_ALIVE_CHK_STATE) { psta->expire_to = pstapriv->expire_to; psta->state ^= WIFI_STA_ALIVE_CHK_STATE; } if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) { struct list_head *xmitframe_plist, *xmitframe_phead; struct xmit_frame *pxmitframe = NULL; struct xmit_priv *pxmitpriv = &padapter->xmitpriv; /* spin_lock_bh(&psta->sleep_q.lock); */ spin_lock_bh(&pxmitpriv->lock); xmitframe_phead = get_list_head(&psta->sleep_q); xmitframe_plist = get_next(xmitframe_phead); if (xmitframe_phead != xmitframe_plist) { pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list); xmitframe_plist = get_next(xmitframe_plist); list_del_init(&pxmitframe->list); psta->sleepq_len--; if (psta->sleepq_len > 0) pxmitframe->attrib.mdata = 1; else pxmitframe->attrib.mdata = 0; pxmitframe->attrib.triggered = 1; rtw_hal_xmitframe_enqueue(padapter, pxmitframe); if (psta->sleepq_len == 0) { pstapriv->tim_bitmap &= ~BIT(psta->aid); /* update BCN for TIM IE */ /* update_BCNTIM(padapter); */ update_beacon(padapter, WLAN_EID_TIM, NULL, true); } /* spin_unlock_bh(&psta->sleep_q.lock); */ spin_unlock_bh(&pxmitpriv->lock); } else { /* spin_unlock_bh(&psta->sleep_q.lock); */ spin_unlock_bh(&pxmitpriv->lock); if (pstapriv->tim_bitmap&BIT(psta->aid)) { if (psta->sleepq_len == 0) { /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */ issue_nulldata_in_interrupt(padapter, psta->hwaddr); } else { psta->sleepq_len = 0; } pstapriv->tim_bitmap &= ~BIT(psta->aid); /* update BCN for TIM IE */ /* update_BCNTIM(padapter); */ update_beacon(padapter, WLAN_EID_TIM, NULL, true); } } } } return _FAIL; } /* perform defrag */ static union recv_frame *recvframe_defrag(struct adapter *adapter, struct __queue *defrag_q) { struct list_head *plist, *phead; u8 wlanhdr_offset; u8 curfragnum; struct recv_frame_hdr *pfhdr, *pnfhdr; union recv_frame *prframe, *pnextrframe; struct __queue *pfree_recv_queue; curfragnum = 0; pfree_recv_queue = &adapter->recvpriv.free_recv_queue; phead = get_list_head(defrag_q); plist = get_next(phead); prframe = (union recv_frame *)plist; pfhdr = &prframe->u.hdr; list_del_init(&(prframe->u.list)); if (curfragnum != pfhdr->attrib.frag_num) { /* the first fragment number must be 0 */ /* free the whole queue */ rtw_free_recvframe(prframe, pfree_recv_queue); rtw_free_recvframe_queue(defrag_q, pfree_recv_queue); return NULL; } curfragnum++; plist = get_list_head(defrag_q); plist = get_next(plist); while (phead != plist) { pnextrframe = (union recv_frame *)plist; pnfhdr = &pnextrframe->u.hdr; /* check the fragment sequence (2nd ~n fragment frame) */ if (curfragnum != pnfhdr->attrib.frag_num) { /* the fragment number must be increasing (after decache) */ /* release the defrag_q & prframe */ rtw_free_recvframe(prframe, pfree_recv_queue); rtw_free_recvframe_queue(defrag_q, pfree_recv_queue); return NULL; } curfragnum++; /* copy the 2nd~n fragment frame's payload to the first fragment */ /* get the 2nd~last fragment frame's payload */ wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len; recvframe_pull(pnextrframe, wlanhdr_offset); /* append to first fragment frame's tail (if privacy frame, pull the ICV) */ recvframe_pull_tail(prframe, pfhdr->attrib.icv_len); /* memcpy */ memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len); recvframe_put(prframe, pnfhdr->len); pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len; plist = get_next(plist); } /* free the defrag_q queue and return the prframe */ rtw_free_recvframe_queue(defrag_q, pfree_recv_queue); return prframe; } /* check if need to defrag, if needed queue the frame to defrag_q */ static union recv_frame *recvframe_chk_defrag(struct adapter *padapter, union recv_frame *precv_frame) { u8 ismfrag; u8 fragnum; u8 *psta_addr; struct recv_frame_hdr *pfhdr; struct sta_info *psta; struct sta_priv *pstapriv; struct list_head *phead; union recv_frame *prtnframe = NULL; struct __queue *pfree_recv_queue, *pdefrag_q; pstapriv = &padapter->stapriv; pfhdr = &precv_frame->u.hdr; pfree_recv_queue = &padapter->recvpriv.free_recv_queue; /* need to define struct of wlan header frame ctrl */ ismfrag = pfhdr->attrib.mfrag; fragnum = pfhdr->attrib.frag_num; psta_addr = pfhdr->attrib.ta; psta = rtw_get_stainfo(pstapriv, psta_addr); if (!psta) { u8 type = GetFrameType(pfhdr->rx_data); if (type != WIFI_DATA_TYPE) { psta = rtw_get_bcmc_stainfo(padapter); pdefrag_q = &psta->sta_recvpriv.defrag_q; } else pdefrag_q = NULL; } else pdefrag_q = &psta->sta_recvpriv.defrag_q; if ((ismfrag == 0) && (fragnum == 0)) prtnframe = precv_frame;/* isn't a fragment frame */ if (ismfrag == 1) { /* 0~(n-1) fragment frame */ /* enqueue to defraf_g */ if (pdefrag_q) { if (fragnum == 0) /* the first fragment */ if (!list_empty(&pdefrag_q->queue)) /* free current defrag_q */ rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue); /* Then enqueue the 0~(n-1) fragment into the defrag_q */ /* spin_lock(&pdefrag_q->lock); */ phead = get_list_head(pdefrag_q); list_add_tail(&pfhdr->list, phead); /* spin_unlock(&pdefrag_q->lock); */ prtnframe = NULL; } else { /* can't find this ta's defrag_queue, so free this recv_frame */ rtw_free_recvframe(precv_frame, pfree_recv_queue); prtnframe = NULL; } } if ((ismfrag == 0) && (fragnum != 0)) { /* the last fragment frame */ /* enqueue the last fragment */ if (pdefrag_q) { /* spin_lock(&pdefrag_q->lock); */ phead = get_list_head(pdefrag_q); list_add_tail(&pfhdr->list, phead); /* spin_unlock(&pdefrag_q->lock); */ /* call recvframe_defrag to defrag */ precv_frame = recvframe_defrag(padapter, pdefrag_q); prtnframe = precv_frame; } else { /* can't find this ta's defrag_queue, so free this recv_frame */ rtw_free_recvframe(precv_frame, pfree_recv_queue); prtnframe = NULL; } } if ((prtnframe) && (prtnframe->u.hdr.attrib.privacy)) { /* after defrag we must check tkip mic code */ if (recvframe_chkmic(padapter, prtnframe) == _FAIL) { rtw_free_recvframe(prtnframe, pfree_recv_queue); prtnframe = NULL; } } return prtnframe; } static signed int validate_recv_mgnt_frame(struct adapter *padapter, union recv_frame *precv_frame) { /* struct mlme_priv *pmlmepriv = &adapter->mlmepriv; */ precv_frame = recvframe_chk_defrag(padapter, precv_frame); if (!precv_frame) return _SUCCESS; { /* for rx pkt statistics */ struct sta_info *psta = rtw_get_stainfo(&padapter->stapriv, GetAddr2Ptr(precv_frame->u.hdr.rx_data)); if (psta) { psta->sta_stats.rx_mgnt_pkts++; if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_BEACON) psta->sta_stats.rx_beacon_pkts++; else if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_PROBEREQ) psta->sta_stats.rx_probereq_pkts++; else if (GetFrameSubType(precv_frame->u.hdr.rx_data) == WIFI_PROBERSP) { if (!memcmp(padapter->eeprompriv.mac_addr, GetAddr1Ptr(precv_frame->u.hdr.rx_data), ETH_ALEN)) psta->sta_stats.rx_probersp_pkts++; else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->u.hdr.rx_data)) || is_multicast_mac_addr(GetAddr1Ptr(precv_frame->u.hdr.rx_data))) psta->sta_stats.rx_probersp_bm_pkts++; else psta->sta_stats.rx_probersp_uo_pkts++; } } } mgt_dispatcher(padapter, precv_frame); return _SUCCESS; } static signed int validate_recv_data_frame(struct adapter *adapter, union recv_frame *precv_frame) { u8 bretry; u8 *psa, *pda, *pbssid; struct sta_info *psta = NULL; u8 *ptr = precv_frame->u.hdr.rx_data; struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; struct security_priv *psecuritypriv = &adapter->securitypriv; signed int ret = _SUCCESS; bretry = GetRetry(ptr); pda = get_da(ptr); psa = get_sa(ptr); pbssid = get_hdr_bssid(ptr); if (!pbssid) { ret = _FAIL; goto exit; } memcpy(pattrib->dst, pda, ETH_ALEN); memcpy(pattrib->src, psa, ETH_ALEN); memcpy(pattrib->bssid, pbssid, ETH_ALEN); switch (pattrib->to_fr_ds) { case 0: memcpy(pattrib->ra, pda, ETH_ALEN); memcpy(pattrib->ta, psa, ETH_ALEN); ret = sta2sta_data_frame(adapter, precv_frame, &psta); break; case 1: memcpy(pattrib->ra, pda, ETH_ALEN); memcpy(pattrib->ta, pbssid, ETH_ALEN); ret = ap2sta_data_frame(adapter, precv_frame, &psta); break; case 2: memcpy(pattrib->ra, pbssid, ETH_ALEN); memcpy(pattrib->ta, psa, ETH_ALEN); ret = sta2ap_data_frame(adapter, precv_frame, &psta); break; case 3: memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN); memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN); ret = _FAIL; break; default: ret = _FAIL; break; } if (ret == _FAIL) { goto exit; } else if (ret == RTW_RX_HANDLED) { goto exit; } if (!psta) { ret = _FAIL; goto exit; } /* psta->rssi = prxcmd->rssi; */ /* psta->signal_quality = prxcmd->sq; */ precv_frame->u.hdr.psta = psta; pattrib->amsdu = 0; pattrib->ack_policy = 0; /* parsing QC field */ if (pattrib->qos == 1) { pattrib->priority = GetPriority((ptr + 24)); pattrib->ack_policy = GetAckpolicy((ptr + 24)); pattrib->amsdu = GetAMsdu((ptr + 24)); pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26; if (pattrib->priority != 0 && pattrib->priority != 3) adapter->recvpriv.bIsAnyNonBEPkts = true; } else { pattrib->priority = 0; pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24; } if (pattrib->order)/* HT-CTRL 11n */ pattrib->hdrlen += 4; precv_frame->u.hdr.preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority]; /* decache, drop duplicate recv packets */ if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) { ret = _FAIL; goto exit; } if (pattrib->privacy) { GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra)); SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt); } else { pattrib->encrypt = 0; pattrib->iv_len = pattrib->icv_len = 0; } exit: return ret; } static signed int validate_80211w_mgmt(struct adapter *adapter, union recv_frame *precv_frame) { struct mlme_priv *pmlmepriv = &adapter->mlmepriv; struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; u8 *ptr = precv_frame->u.hdr.rx_data; u8 subtype; subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */ /* only support station mode */ if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) && check_fwstate(pmlmepriv, _FW_LINKED) && adapter->securitypriv.binstallBIPkey == true) { /* unicast management frame decrypt */ if (pattrib->privacy && !(IS_MCAST(GetAddr1Ptr(ptr))) && (subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC || subtype == WIFI_ACTION)) { u8 *mgmt_DATA; u32 data_len = 0; pattrib->bdecrypted = 0; pattrib->encrypt = _AES_; pattrib->hdrlen = sizeof(struct ieee80211_hdr_3addr); /* set iv and icv length */ SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt); memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN); memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN); /* actual management data frame body */ data_len = pattrib->pkt_len - pattrib->hdrlen - pattrib->iv_len - pattrib->icv_len; mgmt_DATA = rtw_zmalloc(data_len); if (!mgmt_DATA) { goto validate_80211w_fail; } precv_frame = decryptor(adapter, precv_frame); /* save actual management data frame body */ memcpy(mgmt_DATA, ptr+pattrib->hdrlen+pattrib->iv_len, data_len); /* overwrite the iv field */ memcpy(ptr+pattrib->hdrlen, mgmt_DATA, data_len); /* remove the iv and icv length */ pattrib->pkt_len = pattrib->pkt_len - pattrib->iv_len - pattrib->icv_len; kfree(mgmt_DATA); if (!precv_frame) { goto validate_80211w_fail; } } else if (IS_MCAST(GetAddr1Ptr(ptr)) && (subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC)) { signed int BIP_ret = _SUCCESS; /* verify BIP MME IE of broadcast/multicast de-auth/disassoc packet */ BIP_ret = rtw_BIP_verify(adapter, (u8 *)precv_frame); if (BIP_ret == _FAIL) { goto validate_80211w_fail; } else if (BIP_ret == RTW_RX_HANDLED) { /* issue sa query request */ issue_action_SA_Query(adapter, NULL, 0, 0); goto validate_80211w_fail; } } else { /* 802.11w protect */ if (subtype == WIFI_ACTION) { /* according 802.11-2012 standard, these five types are not robust types */ if (ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_PUBLIC && ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_HT && ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_UNPROTECTED_WNM && ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_SELF_PROTECTED && ptr[WLAN_HDR_A3_LEN] != RTW_WLAN_CATEGORY_P2P) { goto validate_80211w_fail; } } else if (subtype == WIFI_DEAUTH || subtype == WIFI_DISASSOC) { /* issue sa query request */ issue_action_SA_Query(adapter, NULL, 0, 0); goto validate_80211w_fail; } } } return _SUCCESS; validate_80211w_fail: return _FAIL; } static signed int validate_recv_frame(struct adapter *adapter, union recv_frame *precv_frame) { /* shall check frame subtype, to / from ds, da, bssid */ /* then call check if rx seq/frag. duplicated. */ u8 type; u8 subtype; signed int retval = _SUCCESS; u8 bDumpRxPkt; struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; u8 *ptr = precv_frame->u.hdr.rx_data; u8 ver = (unsigned char) (*ptr)&0x3; /* add version chk */ if (ver != 0) { retval = _FAIL; goto exit; } type = GetFrameType(ptr); subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */ pattrib->to_fr_ds = get_tofr_ds(ptr); pattrib->frag_num = GetFragNum(ptr); pattrib->seq_num = GetSequence(ptr); pattrib->pw_save = GetPwrMgt(ptr); pattrib->mfrag = GetMFrag(ptr); pattrib->mdata = GetMData(ptr); pattrib->privacy = GetPrivacy(ptr); pattrib->order = GetOrder(ptr); rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt)); switch (type) { case WIFI_MGT_TYPE: /* mgnt */ if (validate_80211w_mgmt(adapter, precv_frame) == _FAIL) { retval = _FAIL; break; } retval = validate_recv_mgnt_frame(adapter, precv_frame); retval = _FAIL; /* only data frame return _SUCCESS */ break; case WIFI_CTRL_TYPE: /* ctrl */ retval = validate_recv_ctrl_frame(adapter, precv_frame); retval = _FAIL; /* only data frame return _SUCCESS */ break; case WIFI_DATA_TYPE: /* data */ pattrib->qos = (subtype & BIT(7)) ? 1:0; retval = validate_recv_data_frame(adapter, precv_frame); if (retval == _FAIL) { struct recv_priv *precvpriv = &adapter->recvpriv; precvpriv->rx_drop++; } else if (retval == _SUCCESS) { #ifdef DBG_RX_DUMP_EAP u8 bDumpRxPkt; u16 eth_type; /* dump eapol */ rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt)); /* get ether_type */ memcpy(ð_type, ptr + pattrib->hdrlen + pattrib->iv_len + LLC_HEADER_LENGTH, 2); eth_type = ntohs((unsigned short) eth_type); #endif } break; default: retval = _FAIL; break; } exit: return retval; } /* remove the wlanhdr and add the eth_hdr */ static signed int wlanhdr_to_ethhdr(union recv_frame *precvframe) { signed int rmv_len; u16 eth_type, len; u8 bsnaphdr; u8 *psnap_type; struct ieee80211_snap_hdr *psnap; __be16 be_tmp; struct adapter *adapter = precvframe->u.hdr.adapter; struct mlme_priv *pmlmepriv = &adapter->mlmepriv; u8 *ptr = get_recvframe_data(precvframe) ; /* point to frame_ctrl field */ struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib; if (pattrib->encrypt) recvframe_pull_tail(precvframe, pattrib->icv_len); psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len); psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE; /* convert hdr + possible LLC headers into Ethernet header */ /* eth_type = (psnap_type[0] << 8) | psnap_type[1]; */ if ((!memcmp(psnap, rfc1042_header, SNAP_SIZE) && (memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2)) && (memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2))) || /* eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) || */ !memcmp(psnap, bridge_tunnel_header, SNAP_SIZE)) { /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */ bsnaphdr = true; } else /* Leave Ethernet header part of hdr and full payload */ bsnaphdr = false; rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr?SNAP_SIZE:0); len = precvframe->u.hdr.len - rmv_len; memcpy(&be_tmp, ptr+rmv_len, 2); eth_type = ntohs(be_tmp); /* pattrib->ether_type */ pattrib->eth_type = eth_type; if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) { ptr += rmv_len; *ptr = 0x87; *(ptr+1) = 0x12; eth_type = 0x8712; /* append rx status for mp test packets */ ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24); memcpy(ptr, get_rxmem(precvframe), 24); ptr += 24; } else ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr?2:0))); memcpy(ptr, pattrib->dst, ETH_ALEN); memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN); if (!bsnaphdr) { be_tmp = htons(len); memcpy(ptr+12, &be_tmp, 2); } return _SUCCESS; } static int amsdu_to_msdu(struct adapter *padapter, union recv_frame *prframe) { int a_len, padding_len; u16 nSubframe_Length; u8 nr_subframes, i; u8 *pdata; struct sk_buff *sub_pkt, *subframes[MAX_SUBFRAME_COUNT]; struct recv_priv *precvpriv = &padapter->recvpriv; struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue); nr_subframes = 0; recvframe_pull(prframe, prframe->u.hdr.attrib.hdrlen); if (prframe->u.hdr.attrib.iv_len > 0) recvframe_pull(prframe, prframe->u.hdr.attrib.iv_len); a_len = prframe->u.hdr.len; pdata = prframe->u.hdr.rx_data; while (a_len > ETH_HLEN) { /* Offset 12 denote 2 mac address */ nSubframe_Length = get_unaligned_be16(pdata + 12); if (a_len < ETH_HLEN + nSubframe_Length) break; sub_pkt = rtw_os_alloc_msdu_pkt(prframe, nSubframe_Length, pdata); if (!sub_pkt) break; /* move the data point to data content */ pdata += ETH_HLEN; a_len -= ETH_HLEN; subframes[nr_subframes++] = sub_pkt; if (nr_subframes >= MAX_SUBFRAME_COUNT) break; pdata += nSubframe_Length; a_len -= nSubframe_Length; if (a_len != 0) { padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1)); if (padding_len == 4) padding_len = 0; if (a_len < padding_len) break; pdata += padding_len; a_len -= padding_len; } } for (i = 0; i < nr_subframes; i++) { sub_pkt = subframes[i]; /* Indicate the packets to upper layer */ if (sub_pkt) rtw_os_recv_indicate_pkt(padapter, sub_pkt, &prframe->u.hdr.attrib); } prframe->u.hdr.len = 0; rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */ return _SUCCESS; } static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num) { struct adapter *padapter = preorder_ctrl->padapter; struct dvobj_priv *psdpriv = padapter->dvobj; struct debug_priv *pdbgpriv = &psdpriv->drv_dbg; u8 wsize = preorder_ctrl->wsize_b; u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/* 4096; */ /* Rx Reorder initialize condition. */ if (preorder_ctrl->indicate_seq == 0xFFFF) { preorder_ctrl->indicate_seq = seq_num; } /* Drop out the packet which SeqNum is smaller than WinStart */ if (SN_LESS(seq_num, preorder_ctrl->indicate_seq)) { return false; } /* */ /* Sliding window manipulation. Conditions includes: */ /* 1. Incoming SeqNum is equal to WinStart =>Window shift 1 */ /* 2. Incoming SeqNum is larger than the WinEnd => Window shift N */ /* */ if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) { preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF; } else if (SN_LESS(wend, seq_num)) { /* boundary situation, when seq_num cross 0xFFF */ if (seq_num >= (wsize - 1)) preorder_ctrl->indicate_seq = seq_num + 1 - wsize; else preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1; pdbgpriv->dbg_rx_ampdu_window_shift_cnt++; } return true; } static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl, union recv_frame *prframe) { struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue; struct list_head *phead, *plist; union recv_frame *pnextrframe; struct rx_pkt_attrib *pnextattrib; /* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */ /* spin_lock(&ppending_recvframe_queue->lock); */ phead = get_list_head(ppending_recvframe_queue); plist = get_next(phead); while (phead != plist) { pnextrframe = (union recv_frame *)plist; pnextattrib = &pnextrframe->u.hdr.attrib; if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num)) plist = get_next(plist); else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num)) /* Duplicate entry is found!! Do not insert current entry. */ /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */ return false; else break; } /* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */ /* spin_lock(&ppending_recvframe_queue->lock); */ list_del_init(&(prframe->u.hdr.list)); list_add_tail(&(prframe->u.hdr.list), plist); /* spin_unlock(&ppending_recvframe_queue->lock); */ /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */ return true; } static void recv_indicatepkts_pkt_loss_cnt(struct debug_priv *pdbgpriv, u64 prev_seq, u64 current_seq) { if (current_seq < prev_seq) pdbgpriv->dbg_rx_ampdu_loss_count += (4096 + current_seq - prev_seq); else pdbgpriv->dbg_rx_ampdu_loss_count += (current_seq - prev_seq); } static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced) { struct list_head *phead, *plist; union recv_frame *prframe; struct rx_pkt_attrib *pattrib; /* u8 index = 0; */ int bPktInBuf = false; struct recv_priv *precvpriv = &padapter->recvpriv; struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue; struct dvobj_priv *psdpriv = padapter->dvobj; struct debug_priv *pdbgpriv = &psdpriv->drv_dbg; /* spin_lock_irqsave(&ppending_recvframe_queue->lock, irql); */ /* spin_lock(&ppending_recvframe_queue->lock); */ phead = get_list_head(ppending_recvframe_queue); plist = get_next(phead); /* Handling some condition for forced indicate case. */ if (bforced == true) { pdbgpriv->dbg_rx_ampdu_forced_indicate_count++; if (list_empty(phead)) { /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */ /* spin_unlock(&ppending_recvframe_queue->lock); */ return true; } prframe = (union recv_frame *)plist; pattrib = &prframe->u.hdr.attrib; recv_indicatepkts_pkt_loss_cnt(pdbgpriv, preorder_ctrl->indicate_seq, pattrib->seq_num); preorder_ctrl->indicate_seq = pattrib->seq_num; } /* Prepare indication list and indication. */ /* Check if there is any packet need indicate. */ while (!list_empty(phead)) { prframe = (union recv_frame *)plist; pattrib = &prframe->u.hdr.attrib; if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) { plist = get_next(plist); list_del_init(&(prframe->u.hdr.list)); if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num)) preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF; /* Set this as a lock to make sure that only one thread is indicating packet. */ /* pTS->RxIndicateState = RXTS_INDICATE_PROCESSING; */ /* Indicate packets */ /* indicate this recv_frame */ if (!pattrib->amsdu) { if ((padapter->bDriverStopped == false) && (padapter->bSurpriseRemoved == false)) rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */ } else if (pattrib->amsdu == 1) { if (amsdu_to_msdu(padapter, prframe) != _SUCCESS) rtw_free_recvframe(prframe, &precvpriv->free_recv_queue); } else { /* error condition; */ } /* Update local variables. */ bPktInBuf = false; } else { bPktInBuf = true; break; } } /* spin_unlock(&ppending_recvframe_queue->lock); */ /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */ return bPktInBuf; } static int recv_indicatepkt_reorder(struct adapter *padapter, union recv_frame *prframe) { int retval = _SUCCESS; struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; struct recv_reorder_ctrl *preorder_ctrl = prframe->u.hdr.preorder_ctrl; struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue; struct dvobj_priv *psdpriv = padapter->dvobj; struct debug_priv *pdbgpriv = &psdpriv->drv_dbg; if (!pattrib->amsdu) { /* s1. */ wlanhdr_to_ethhdr(prframe); if (pattrib->qos != 1) { if ((padapter->bDriverStopped == false) && (padapter->bSurpriseRemoved == false)) { rtw_recv_indicatepkt(padapter, prframe); return _SUCCESS; } return _FAIL; } if (preorder_ctrl->enable == false) { /* indicate this recv_frame */ preorder_ctrl->indicate_seq = pattrib->seq_num; rtw_recv_indicatepkt(padapter, prframe); preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096; return _SUCCESS; } } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */ if (preorder_ctrl->enable == false) { preorder_ctrl->indicate_seq = pattrib->seq_num; retval = amsdu_to_msdu(padapter, prframe); preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096; if (retval != _SUCCESS) { } return retval; } } spin_lock_bh(&ppending_recvframe_queue->lock); /* s2. check if winstart_b(indicate_seq) needs to been updated */ if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) { pdbgpriv->dbg_rx_ampdu_drop_count++; goto _err_exit; } /* s3. Insert all packet into Reorder Queue to maintain its ordering. */ if (!enqueue_reorder_recvframe(preorder_ctrl, prframe)) { /* spin_unlock_irqrestore(&ppending_recvframe_queue->lock, irql); */ /* return _FAIL; */ goto _err_exit; } /* s4. */ /* Indication process. */ /* After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */ /* with the SeqNum smaller than latest WinStart and buffer other packets. */ /* */ /* For Rx Reorder condition: */ /* 1. All packets with SeqNum smaller than WinStart => Indicate */ /* 2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */ /* */ /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */ if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false) == true) { _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME); spin_unlock_bh(&ppending_recvframe_queue->lock); } else { spin_unlock_bh(&ppending_recvframe_queue->lock); del_timer_sync(&preorder_ctrl->reordering_ctrl_timer); } return _SUCCESS; _err_exit: spin_unlock_bh(&ppending_recvframe_queue->lock); return _FAIL; } void rtw_reordering_ctrl_timeout_handler(struct timer_list *t) { struct recv_reorder_ctrl *preorder_ctrl = from_timer(preorder_ctrl, t, reordering_ctrl_timer); struct adapter *padapter = preorder_ctrl->padapter; struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue; if (padapter->bDriverStopped || padapter->bSurpriseRemoved) return; spin_lock_bh(&ppending_recvframe_queue->lock); if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true) _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME); spin_unlock_bh(&ppending_recvframe_queue->lock); } static int process_recv_indicatepkts(struct adapter *padapter, union recv_frame *prframe) { int retval = _SUCCESS; /* struct recv_priv *precvpriv = &padapter->recvpriv; */ /* struct rx_pkt_attrib *pattrib = &prframe->u.hdr.attrib; */ struct mlme_priv *pmlmepriv = &padapter->mlmepriv; struct ht_priv *phtpriv = &pmlmepriv->htpriv; if (phtpriv->ht_option == true) { /* B/G/N Mode */ /* prframe->u.hdr.preorder_ctrl = &precvpriv->recvreorder_ctrl[pattrib->priority]; */ if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) { /* including perform A-MPDU Rx Ordering Buffer Control */ if ((padapter->bDriverStopped == false) && (padapter->bSurpriseRemoved == false)) { retval = _FAIL; return retval; } } } else { /* B/G mode */ retval = wlanhdr_to_ethhdr(prframe); if (retval != _SUCCESS) return retval; if ((padapter->bDriverStopped == false) && (padapter->bSurpriseRemoved == false)) { /* indicate this recv_frame */ rtw_recv_indicatepkt(padapter, prframe); } else { retval = _FAIL; return retval; } } return retval; } static int recv_func_prehandle(struct adapter *padapter, union recv_frame *rframe) { int ret = _SUCCESS; struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue; /* check the frame crtl field and decache */ ret = validate_recv_frame(padapter, rframe); if (ret != _SUCCESS) { rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */ goto exit; } exit: return ret; } static int recv_func_posthandle(struct adapter *padapter, union recv_frame *prframe) { int ret = _SUCCESS; union recv_frame *orig_prframe = prframe; struct recv_priv *precvpriv = &padapter->recvpriv; struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue; prframe = decryptor(padapter, prframe); if (!prframe) { ret = _FAIL; goto _recv_data_drop; } prframe = recvframe_chk_defrag(padapter, prframe); if (!prframe) goto _recv_data_drop; prframe = portctrl(padapter, prframe); if (!prframe) { ret = _FAIL; goto _recv_data_drop; } count_rx_stats(padapter, prframe, NULL); ret = process_recv_indicatepkts(padapter, prframe); if (ret != _SUCCESS) { rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */ goto _recv_data_drop; } _recv_data_drop: precvpriv->rx_drop++; return ret; } static int recv_func(struct adapter *padapter, union recv_frame *rframe) { int ret; struct rx_pkt_attrib *prxattrib = &rframe->u.hdr.attrib; struct recv_priv *recvpriv = &padapter->recvpriv; struct security_priv *psecuritypriv = &padapter->securitypriv; struct mlme_priv *mlmepriv = &padapter->mlmepriv; /* check if need to handle uc_swdec_pending_queue*/ if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) { union recv_frame *pending_frame; int cnt = 0; while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) { cnt++; 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_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 && (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt == true) && psecuritypriv->ndisauthtype == Ndis802_11AuthModeWPAPSK && !psecuritypriv->busetkipkey) { rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue); if (recvpriv->free_recvframe_cnt < NR_RECVFRAME/4) { /* to prevent from recvframe starvation, get recvframe from uc_swdec_pending_queue to free_recvframe_cnt */ rframe = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue); if (rframe) goto do_posthandle; } goto exit; } do_posthandle: ret = recv_func_posthandle(padapter, rframe); } exit: return ret; } s32 rtw_recv_entry(union recv_frame *precvframe) { struct adapter *padapter; struct recv_priv *precvpriv; s32 ret = _SUCCESS; padapter = precvframe->u.hdr.adapter; precvpriv = &padapter->recvpriv; ret = recv_func(padapter, precvframe); if (ret == _FAIL) { goto _recv_entry_drop; } precvpriv->rx_pkts++; return ret; _recv_entry_drop: return ret; } static void rtw_signal_stat_timer_hdl(struct timer_list *t) { struct adapter *adapter = from_timer(adapter, t, recvpriv.signal_stat_timer); struct recv_priv *recvpriv = &adapter->recvpriv; u32 tmp_s, tmp_q; u8 avg_signal_strength = 0; u8 avg_signal_qual = 0; u32 num_signal_strength = 0; u32 __maybe_unused num_signal_qual = 0; u8 _alpha = 5; /* this value is based on converging_constant = 5000 and sampling_interval = 1000 */ if (adapter->recvpriv.is_signal_dbg) { /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */ adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg; adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg); } else { if (recvpriv->signal_strength_data.update_req == 0) {/* update_req is clear, means we got rx */ avg_signal_strength = recvpriv->signal_strength_data.avg_val; num_signal_strength = recvpriv->signal_strength_data.total_num; /* after avg_vals are acquired, we can re-stat the signal values */ recvpriv->signal_strength_data.update_req = 1; } if (recvpriv->signal_qual_data.update_req == 0) {/* update_req is clear, means we got rx */ avg_signal_qual = recvpriv->signal_qual_data.avg_val; num_signal_qual = recvpriv->signal_qual_data.total_num; /* after avg_vals are acquired, we can re-stat the signal values */ recvpriv->signal_qual_data.update_req = 1; } if (num_signal_strength == 0) { if (rtw_get_on_cur_ch_time(adapter) == 0 || jiffies_to_msecs(jiffies - rtw_get_on_cur_ch_time(adapter)) < 2 * adapter->mlmeextpriv.mlmext_info.bcn_interval ) { goto set_timer; } } if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == true || check_fwstate(&adapter->mlmepriv, _FW_LINKED) == false ) { goto set_timer; } /* update value of signal_strength, rssi, signal_qual */ tmp_s = (avg_signal_strength+(_alpha-1)*recvpriv->signal_strength); if (tmp_s % _alpha) tmp_s = tmp_s/_alpha + 1; else tmp_s = tmp_s/_alpha; if (tmp_s > 100) tmp_s = 100; tmp_q = (avg_signal_qual+(_alpha-1)*recvpriv->signal_qual); if (tmp_q % _alpha) tmp_q = tmp_q/_alpha + 1; else tmp_q = tmp_q/_alpha; if (tmp_q > 100) tmp_q = 100; recvpriv->signal_strength = tmp_s; recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s); recvpriv->signal_qual = tmp_q; } set_timer: rtw_set_signal_stat_timer(recvpriv); }