| /****************************************************************************** |
| * rtl871x_recv.c |
| * |
| * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. |
| * Linux device driver for RTL8192SU |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| * |
| * Modifications for inclusion into the Linux staging tree are |
| * Copyright(c) 2010 Larry Finger. All rights reserved. |
| * |
| * Contact information: |
| * WLAN FAE <wlanfae@realtek.com> |
| * Larry Finger <Larry.Finger@lwfinger.net> |
| * |
| ******************************************************************************/ |
| |
| #define _RTL871X_RECV_C_ |
| |
| #include <linux/ip.h> |
| #include <linux/slab.h> |
| #include <linux/if_ether.h> |
| #include <linux/kmemleak.h> |
| #include <linux/etherdevice.h> |
| |
| #include "osdep_service.h" |
| #include "drv_types.h" |
| #include "recv_osdep.h" |
| #include "mlme_osdep.h" |
| #include "ethernet.h" |
| #include "usb_ops.h" |
| #include "wifi.h" |
| |
| static const u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37}; |
| |
| /* Datagram Delivery Protocol */ |
| static const u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3}; |
| |
| /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| static const u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8}; |
| |
| /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
| static const u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00}; |
| |
| void _r8712_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); |
| _init_queue(&psta_recvpriv->defrag_q); |
| } |
| |
| sint _r8712_init_recv_priv(struct recv_priv *precvpriv, |
| struct _adapter *padapter) |
| { |
| sint i; |
| union recv_frame *precvframe; |
| |
| memset((unsigned char *)precvpriv, 0, sizeof(struct recv_priv)); |
| spin_lock_init(&precvpriv->lock); |
| _init_queue(&precvpriv->free_recv_queue); |
| _init_queue(&precvpriv->recv_pending_queue); |
| precvpriv->adapter = padapter; |
| precvpriv->free_recvframe_cnt = NR_RECVFRAME; |
| precvpriv->pallocated_frame_buf = kzalloc(NR_RECVFRAME * |
| sizeof(union recv_frame) + RXFRAME_ALIGN_SZ, |
| GFP_ATOMIC); |
| if (precvpriv->pallocated_frame_buf == NULL) |
| return _FAIL; |
| kmemleak_not_leak(precvpriv->pallocated_frame_buf); |
| precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf + |
| RXFRAME_ALIGN_SZ - |
| ((addr_t)(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)); |
| r8712_os_recv_resource_alloc(padapter, precvframe); |
| precvframe->u.hdr.adapter = padapter; |
| precvframe++; |
| } |
| precvpriv->rx_pending_cnt = 1; |
| return r8712_init_recv_priv(precvpriv, padapter); |
| } |
| |
| void _r8712_free_recv_priv(struct recv_priv *precvpriv) |
| { |
| kfree(precvpriv->pallocated_frame_buf); |
| r8712_free_recv_priv(precvpriv); |
| } |
| |
| union recv_frame *r8712_alloc_recvframe(struct __queue *pfree_recv_queue) |
| { |
| unsigned long irqL; |
| union recv_frame *precvframe; |
| struct _adapter *padapter; |
| struct recv_priv *precvpriv; |
| |
| spin_lock_irqsave(&pfree_recv_queue->lock, irqL); |
| precvframe = list_first_entry_or_null(&pfree_recv_queue->queue, |
| union recv_frame, u.hdr.list); |
| if (precvframe) { |
| list_del_init(&precvframe->u.hdr.list); |
| padapter = precvframe->u.hdr.adapter; |
| if (padapter != NULL) { |
| precvpriv = &padapter->recvpriv; |
| if (pfree_recv_queue == &precvpriv->free_recv_queue) |
| precvpriv->free_recvframe_cnt--; |
| } |
| } |
| spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL); |
| return precvframe; |
| } |
| |
| /* |
| * caller : defrag; recvframe_chk_defrag in recv_thread (passive) |
| * pframequeue: defrag_queue : will be accessed in recv_thread (passive) |
| * using spin_lock to protect |
| */ |
| void r8712_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 = &pframequeue->queue; |
| plist = phead->next; |
| while (!end_of_queue_search(phead, plist)) { |
| precvframe = container_of(plist, union recv_frame, u.list); |
| plist = plist->next; |
| r8712_free_recvframe(precvframe, pfree_recv_queue); |
| } |
| spin_unlock(&pframequeue->lock); |
| } |
| |
| sint r8712_recvframe_chkmic(struct _adapter *adapter, |
| union recv_frame *precvframe) |
| { |
| sint i, res = _SUCCESS; |
| u32 datalen; |
| u8 miccode[8]; |
| u8 bmic_err = false; |
| u8 *pframe, *payload, *pframemic; |
| u8 *mickey, idx, *iv; |
| struct sta_info *stainfo; |
| struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib; |
| struct security_priv *psecuritypriv = &adapter->securitypriv; |
| |
| stainfo = r8712_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]); |
| if (prxattrib->encrypt == _TKIP_) { |
| /* calculate mic code */ |
| if (stainfo != NULL) { |
| if (IS_MCAST(prxattrib->ra)) { |
| iv = precvframe->u.hdr.rx_data + |
| prxattrib->hdrlen; |
| idx = iv[3]; |
| mickey = &psecuritypriv->XGrprxmickey[(((idx >> |
| 6) & 0x3)) - 1].skey[0]; |
| if (!psecuritypriv->binstallGrpkey) |
| return _FAIL; |
| } else { |
| mickey = &stainfo->tkiprxmickey.skey[0]; |
| } |
| /*icv_len included the mic code*/ |
| datalen = precvframe->u.hdr.len - prxattrib->hdrlen - |
| prxattrib->iv_len - prxattrib->icv_len - 8; |
| pframe = precvframe->u.hdr.rx_data; |
| payload = pframe + prxattrib->hdrlen + |
| prxattrib->iv_len; |
| seccalctkipmic(mickey, pframe, payload, datalen, |
| &miccode[0], |
| (unsigned char)prxattrib->priority); |
| pframemic = payload + datalen; |
| bmic_err = false; |
| for (i = 0; i < 8; i++) { |
| if (miccode[i] != *(pframemic + i)) |
| bmic_err = true; |
| } |
| if (bmic_err) { |
| if (prxattrib->bdecrypted) |
| r8712_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); |
| } |
| } |
| return res; |
| } |
| |
| /* decrypt and set the ivlen,icvlen of the recv_frame */ |
| union recv_frame *r8712_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; |
| |
| if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || |
| psecuritypriv->sw_decrypt)) { |
| psecuritypriv->hw_decrypted = false; |
| switch (prxattrib->encrypt) { |
| case _WEP40_: |
| case _WEP104_: |
| r8712_wep_decrypt(padapter, (u8 *)precv_frame); |
| break; |
| case _TKIP_: |
| r8712_tkip_decrypt(padapter, (u8 *)precv_frame); |
| break; |
| case _AES_: |
| r8712_aes_decrypt(padapter, (u8 *)precv_frame); |
| break; |
| default: |
| break; |
| } |
| } else if (prxattrib->bdecrypted == 1) { |
| psecuritypriv->hw_decrypted = true; |
| } |
| return return_packet; |
| } |
| /*###set the security information in the recv_frame */ |
| union recv_frame *r8712_portctrl(struct _adapter *adapter, |
| union recv_frame *precv_frame) |
| { |
| u8 *psta_addr, *ptr; |
| uint auth_alg; |
| struct recv_frame_hdr *pfhdr; |
| struct sta_info *psta; |
| struct sta_priv *pstapriv; |
| union recv_frame *prtnframe; |
| u16 ether_type; |
| |
| pstapriv = &adapter->stapriv; |
| ptr = get_recvframe_data(precv_frame); |
| pfhdr = &precv_frame->u.hdr; |
| psta_addr = pfhdr->attrib.ta; |
| psta = r8712_get_stainfo(pstapriv, psta_addr); |
| auth_alg = adapter->securitypriv.AuthAlgrthm; |
| if (auth_alg == 2) { |
| /* get ether_type */ |
| ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE; |
| memcpy(ðer_type, ptr, 2); |
| be16_to_cpus(ðer_type); |
| |
| if ((psta != NULL) && (psta->ieee8021x_blocked)) { |
| /* blocked |
| * only accept EAPOL frame |
| */ |
| if (ether_type == 0x888e) { |
| prtnframe = precv_frame; |
| } else { |
| /*free this frame*/ |
| r8712_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 == 0x888e) { |
| /* check Rekey */ |
| prtnframe = precv_frame; |
| } |
| } |
| } else { |
| prtnframe = precv_frame; |
| } |
| return prtnframe; |
| } |
| |
| static sint recv_decache(union recv_frame *precv_frame, u8 bretry, |
| struct stainfo_rxcache *prxcache) |
| { |
| sint 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 (seq_ctrl == prxcache->tid_rxseq[tid]) |
| return _FAIL; |
| prxcache->tid_rxseq[tid] = seq_ctrl; |
| return _SUCCESS; |
| } |
| |
| static sint sta2sta_data_frame(struct _adapter *adapter, |
| union recv_frame *precv_frame, |
| struct sta_info **psta) |
| { |
| u8 *ptr = precv_frame->u.hdr.rx_data; |
| sint 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; |
| sint bmcast = IS_MCAST(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)) |
| return _FAIL; |
| if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) |
| return _FAIL; |
| if (is_zero_ether_addr(pattrib->bssid) || |
| is_zero_ether_addr(mybssid) || |
| (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) |
| return _FAIL; |
| 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)) |
| return _FAIL; |
| sta_addr = pattrib->bssid; |
| } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { |
| if (bmcast) { |
| /* For AP mode, if DA == MCAST, then BSSID should |
| * be also MCAST |
| */ |
| if (!IS_MCAST(pattrib->bssid)) |
| return _FAIL; |
| } 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)) |
| return _FAIL; |
| sta_addr = pattrib->src; |
| } |
| } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) { |
| memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN); |
| memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN); |
| memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN); |
| memcpy(pattrib->ra, pattrib->dst, ETH_ALEN); |
| memcpy(pattrib->ta, pattrib->src, ETH_ALEN); |
| sta_addr = mybssid; |
| } else { |
| ret = _FAIL; |
| } |
| if (bmcast) |
| *psta = r8712_get_bcmc_stainfo(adapter); |
| else |
| *psta = r8712_get_stainfo(pstapriv, sta_addr); /* get ap_info */ |
| if (*psta == NULL) { |
| if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) |
| adapter->mppriv.rx_pktloss++; |
| return _FAIL; |
| } |
| return ret; |
| } |
| |
| static sint 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; |
| struct sta_priv *pstapriv = &adapter->stapriv; |
| struct mlme_priv *pmlmepriv = &adapter->mlmepriv; |
| u8 *mybssid = get_bssid(pmlmepriv); |
| u8 *myhwaddr = myid(&adapter->eeprompriv); |
| sint bmcast = IS_MCAST(pattrib->dst); |
| |
| if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) && |
| check_fwstate(pmlmepriv, _FW_LINKED)) { |
| /* if NULL-frame, drop packet */ |
| if ((GetFrameSubType(ptr)) == WIFI_DATA_NULL) |
| return _FAIL; |
| /* drop QoS-SubType Data, including QoS NULL, |
| * excluding QoS-Data |
| */ |
| if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == |
| WIFI_QOS_DATA_TYPE) { |
| if (GetFrameSubType(ptr) & (BIT(4) | BIT(5) | BIT(6))) |
| return _FAIL; |
| } |
| |
| /* filter packets that SA is myself or multicast or broadcast */ |
| if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) |
| return _FAIL; |
| |
| /* da should be for me */ |
| if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) |
| return _FAIL; |
| /* check BSSID */ |
| if (is_zero_ether_addr(pattrib->bssid) || |
| is_zero_ether_addr(mybssid) || |
| (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) |
| return _FAIL; |
| if (bmcast) |
| *psta = r8712_get_bcmc_stainfo(adapter); |
| else |
| *psta = r8712_get_stainfo(pstapriv, pattrib->bssid); |
| if (*psta == NULL) |
| return _FAIL; |
| } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) && |
| check_fwstate(pmlmepriv, _FW_LINKED)) { |
| 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 = r8712_get_stainfo(pstapriv, pattrib->bssid); |
| if (*psta == NULL) |
| return _FAIL; |
| } else { |
| return _FAIL; |
| } |
| return _SUCCESS; |
| } |
| |
| static sint sta2ap_data_frame(struct _adapter *adapter, |
| union recv_frame *precv_frame, |
| struct sta_info **psta) |
| { |
| 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); |
| |
| if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { |
| /* For AP mode, if DA is non-MCAST, then it must be BSSID, |
| * and bssid == BSSID |
| * For AP mode, RA=BSSID, TX=STA(SRC_ADDR), A3=DST_ADDR |
| */ |
| if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) |
| return _FAIL; |
| *psta = r8712_get_stainfo(pstapriv, pattrib->src); |
| if (*psta == NULL) |
| return _FAIL; |
| } |
| return _SUCCESS; |
| } |
| |
| static sint validate_recv_ctrl_frame(struct _adapter *adapter, |
| union recv_frame *precv_frame) |
| { |
| return _FAIL; |
| } |
| |
| static sint validate_recv_mgnt_frame(struct _adapter *adapter, |
| union recv_frame *precv_frame) |
| { |
| return _FAIL; |
| } |
| |
| |
| static sint validate_recv_data_frame(struct _adapter *adapter, |
| union recv_frame *precv_frame) |
| { |
| int res; |
| 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; |
| |
| bretry = GetRetry(ptr); |
| pda = get_da(ptr); |
| psa = get_sa(ptr); |
| pbssid = get_hdr_bssid(ptr); |
| if (pbssid == NULL) |
| return _FAIL; |
| 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); |
| res = sta2sta_data_frame(adapter, precv_frame, &psta); |
| break; |
| case 1: |
| memcpy(pattrib->ra, pda, ETH_ALEN); |
| memcpy(pattrib->ta, pbssid, ETH_ALEN); |
| res = ap2sta_data_frame(adapter, precv_frame, &psta); |
| break; |
| case 2: |
| memcpy(pattrib->ra, pbssid, ETH_ALEN); |
| memcpy(pattrib->ta, psa, ETH_ALEN); |
| res = sta2ap_data_frame(adapter, precv_frame, &psta); |
| break; |
| case 3: |
| memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN); |
| memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN); |
| return _FAIL; |
| default: |
| return _FAIL; |
| } |
| if (res == _FAIL) |
| return _FAIL; |
| if (psta == NULL) |
| return _FAIL; |
| precv_frame->u.hdr.psta = psta; |
| pattrib->amsdu = 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; |
| } 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) |
| return _FAIL; |
| |
| 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; |
| } |
| return _SUCCESS; |
| } |
| |
| sint r8712_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; |
| sint retval = _SUCCESS; |
| 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) |
| return _FAIL; |
| 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); |
| switch (type) { |
| case WIFI_MGT_TYPE: /*mgnt*/ |
| retval = validate_recv_mgnt_frame(adapter, precv_frame); |
| break; |
| case WIFI_CTRL_TYPE:/*ctrl*/ |
| retval = validate_recv_ctrl_frame(adapter, precv_frame); |
| break; |
| case WIFI_DATA_TYPE: /*data*/ |
| pattrib->qos = (subtype & BIT(7)) ? 1 : 0; |
| retval = validate_recv_data_frame(adapter, precv_frame); |
| break; |
| default: |
| return _FAIL; |
| } |
| return retval; |
| } |
| |
| sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe) |
| { |
| /*remove the wlanhdr and add the eth_hdr*/ |
| sint rmv_len; |
| u16 len; |
| u8 bsnaphdr; |
| u8 *psnap_type; |
| struct ieee80211_snap_hdr *psnap; |
| 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 */ |
| if ((!memcmp(psnap, (void *)rfc1042_header, SNAP_SIZE) && |
| (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_IPX, 2)) && |
| (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_APPLETALK_AARP, 2))) || |
| !memcmp(psnap, (void *)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; |
| if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) { |
| ptr += rmv_len; |
| *ptr = 0x87; |
| *(ptr + 1) = 0x12; |
| /* 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) { |
| __be16 be_tmp = htons(len); |
| |
| memcpy(ptr + 12, &be_tmp, 2); |
| } |
| return _SUCCESS; |
| } |
| |
| s32 r8712_recv_entry(union recv_frame *precvframe) |
| { |
| struct _adapter *padapter; |
| struct recv_priv *precvpriv; |
| |
| s32 ret = _SUCCESS; |
| |
| padapter = precvframe->u.hdr.adapter; |
| precvpriv = &(padapter->recvpriv); |
| |
| padapter->ledpriv.LedControlHandler(padapter, LED_CTL_RX); |
| |
| ret = recv_func(padapter, precvframe); |
| if (ret == _FAIL) |
| goto _recv_entry_drop; |
| precvpriv->rx_pkts++; |
| precvpriv->rx_bytes += (uint)(precvframe->u.hdr.rx_tail - |
| precvframe->u.hdr.rx_data); |
| return ret; |
| _recv_entry_drop: |
| precvpriv->rx_drop++; |
| padapter->mppriv.rx_pktloss = precvpriv->rx_drop; |
| return ret; |
| } |