/** @file mlan_uap_txrx.c * * @brief This file contains AP mode transmit and receive functions * * Copyright (C) 2009-2011, Marvell International Ltd. * * This software file (the "File") is distributed by Marvell International * Ltd. under the terms of the GNU General Public License Version 2, June 1991 * (the "License"). You may use, redistribute and/or modify this File in * accordance with the terms and conditions of the License, a copy of which * is available by writing to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. * * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE * ARE EXPRESSLY DISCLAIMED. The License provides additional details about * this warranty disclaimer. */ /******************************************************** Change log: 02/05/2009: initial version ********************************************************/ #include "mlan.h" #include "mlan_util.h" #include "mlan_fw.h" #ifdef STA_SUPPORT #include "mlan_join.h" #endif #include "mlan_main.h" #include "mlan_uap.h" #include "mlan_sdio.h" #include "mlan_wmm.h" #include "mlan_11n_aggr.h" #include "mlan_11n_rxreorder.h" /******************************************************** Local Functions ********************************************************/ /** * @brief This function processes received packet and forwards it * to kernel/upper layer * * @param pmadapter A pointer to mlan_adapter * @param pmbuf A pointer to mlan_buffer which includes the received packet * * @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE */ static mlan_status wlan_upload_uap_rx_packet(pmlan_adapter pmadapter, pmlan_buffer pmbuf) { mlan_status ret = MLAN_STATUS_SUCCESS; UapRxPD *prx_pd; ENTER(); prx_pd = (UapRxPD *) (pmbuf->pbuf + pmbuf->data_offset); /* Chop off RxPD */ pmbuf->data_len -= prx_pd->rx_pkt_offset; pmbuf->data_offset += prx_pd->rx_pkt_offset; pmbuf->pparent = MNULL; DBG_HEXDUMP(MDAT_D, "uAP RxPD", (t_u8 *) prx_pd, MIN(sizeof(UapRxPD), MAX_DATA_DUMP_LEN)); DBG_HEXDUMP(MDAT_D, "uAP Rx Payload", ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset), MIN(prx_pd->rx_pkt_length, MAX_DATA_DUMP_LEN)); pmadapter->callbacks.moal_get_system_time(pmadapter->pmoal_handle, &pmbuf->out_ts_sec, &pmbuf->out_ts_usec); PRINTM(MDATA, "%lu.%06lu : Data => kernel seq_num=%d tid=%d\n", pmbuf->out_ts_sec, pmbuf->out_ts_usec, prx_pd->seq_num, prx_pd->priority); ret = pmadapter->callbacks.moal_recv_packet(pmadapter->pmoal_handle, pmbuf); if (ret == MLAN_STATUS_FAILURE) { PRINTM(MERROR, "uAP Rx Error: moal_recv_packet returned error\n"); pmbuf->status_code = MLAN_ERROR_PKT_INVALID; } if (ret != MLAN_STATUS_PENDING) { wlan_free_mlan_buffer(pmadapter, pmbuf); } LEAVE(); return ret; } /** * @brief This function will check if unicast packet need be dropped * * @param priv A pointer to mlan_private * @param mac mac address to find in station list table * * @return MLAN_STATUS_FAILURE -- drop packet, otherwise forward to network stack */ static mlan_status wlan_check_unicast_packet(mlan_private * priv, t_u8 * mac) { int j; sta_node *sta_ptr = MNULL; pmlan_adapter pmadapter = priv->adapter; pmlan_private pmpriv = MNULL; t_u8 pkt_type = 0; mlan_status ret = MLAN_STATUS_SUCCESS; ENTER(); for (j = 0; j < MLAN_MAX_BSS_NUM; ++j) { if ((pmpriv = pmadapter->priv[j])) { if (GET_BSS_ROLE(pmpriv) == MLAN_BSS_ROLE_STA) continue; sta_ptr = wlan_get_station_entry(pmpriv, mac); if (sta_ptr) { if (pmpriv == priv) pkt_type = PKT_INTRA_UCAST; else pkt_type = PKT_INTER_UCAST; break; } } } if ((pkt_type == PKT_INTRA_UCAST) && (priv->pkt_fwd & PKT_FWD_INTRA_UCAST)) { PRINTM(MDATA, "Drop INTRA_UCAST packet\n"); ret = MLAN_STATUS_FAILURE; } else if ((pkt_type == PKT_INTER_UCAST) && (priv->pkt_fwd & PKT_FWD_INTER_UCAST)) { PRINTM(MDATA, "Drop INTER_UCAST packet\n"); ret = MLAN_STATUS_FAILURE; } LEAVE(); return ret; } /******************************************************** Global Functions ********************************************************/ /** * @brief This function fill the txpd for tx packet * * @param priv A pointer to mlan_private structure * @param pmbuf A pointer to the mlan_buffer for process * * @return headptr or MNULL */ t_void * wlan_ops_uap_process_txpd(IN t_void * priv, IN pmlan_buffer pmbuf) { pmlan_private pmpriv = (pmlan_private) priv; UapTxPD *plocal_tx_pd; t_u8 *head_ptr = MNULL; t_u32 pkt_type; t_u32 tx_control; ENTER(); if (!pmbuf->data_len) { PRINTM(MERROR, "uAP Tx Error: Invalid packet length: %d\n", pmbuf->data_len); pmbuf->status_code = MLAN_ERROR_PKT_SIZE_INVALID; goto done; } if (pmbuf->buf_type == MLAN_BUF_TYPE_RAW_DATA) { memcpy(pmpriv->adapter, &pkt_type, pmbuf->pbuf + pmbuf->data_offset, sizeof(pkt_type)); memcpy(pmpriv->adapter, &tx_control, pmbuf->pbuf + pmbuf->data_offset + sizeof(pkt_type), sizeof(tx_control)); pmbuf->data_offset += sizeof(pkt_type) + sizeof(tx_control); pmbuf->data_len -= sizeof(pkt_type) + sizeof(tx_control); } if (pmbuf->data_offset < (sizeof(UapTxPD) + INTF_HEADER_LEN + DMA_ALIGNMENT)) { PRINTM(MERROR, "not enough space for UapTxPD: len=%d, offset=%d\n", pmbuf->data_len, pmbuf->data_offset); DBG_HEXDUMP(MDAT_D, "drop pkt", pmbuf->pbuf + pmbuf->data_offset, pmbuf->data_len); pmbuf->status_code = MLAN_ERROR_PKT_SIZE_INVALID; goto done; } /* head_ptr should be aligned */ head_ptr = pmbuf->pbuf + pmbuf->data_offset - sizeof(UapTxPD) - INTF_HEADER_LEN; head_ptr = (t_u8 *) ((t_ptr) head_ptr & ~((t_ptr) (DMA_ALIGNMENT - 1))); plocal_tx_pd = (UapTxPD *) (head_ptr + INTF_HEADER_LEN); memset(pmpriv->adapter, plocal_tx_pd, 0, sizeof(UapTxPD)); /* Set the BSS number to TxPD */ plocal_tx_pd->bss_num = GET_BSS_NUM(pmpriv); plocal_tx_pd->bss_type = pmpriv->bss_type; plocal_tx_pd->tx_pkt_length = (t_u16) pmbuf->data_len; plocal_tx_pd->priority = (t_u8) pmbuf->priority; plocal_tx_pd->pkt_delay_2ms = wlan_wmm_compute_driver_packet_delay(pmpriv, pmbuf); if (plocal_tx_pd->priority < NELEMENTS(pmpriv->wmm.user_pri_pkt_tx_ctrl)) /* * Set the priority specific tx_control field, setting of 0 will * cause the default value to be used later in this function */ plocal_tx_pd->tx_control = pmpriv->wmm.user_pri_pkt_tx_ctrl[plocal_tx_pd->priority]; /* Offset of actual data */ plocal_tx_pd->tx_pkt_offset = (t_u16) ((t_ptr) pmbuf->pbuf + pmbuf->data_offset - (t_ptr) plocal_tx_pd); if (pmbuf->buf_type == MLAN_BUF_TYPE_RAW_DATA) { plocal_tx_pd->tx_pkt_type = (t_u16) pkt_type; plocal_tx_pd->tx_control = tx_control; } uap_endian_convert_TxPD(plocal_tx_pd); /* Adjust the data offset and length to include TxPD in pmbuf */ pmbuf->data_len += pmbuf->data_offset; pmbuf->data_offset = (t_u32) ((t_ptr) head_ptr - (t_ptr) pmbuf->pbuf); pmbuf->data_len -= pmbuf->data_offset; done: LEAVE(); return head_ptr; } /** * @brief This function processes received packet and forwards it * to kernel/upper layer * * @param adapter A pointer to mlan_adapter * @param pmbuf A pointer to mlan_buffer which includes the received packet * * @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE */ mlan_status wlan_ops_uap_process_rx_packet(IN t_void * adapter, IN pmlan_buffer pmbuf) { pmlan_adapter pmadapter = (pmlan_adapter) adapter; mlan_status ret = MLAN_STATUS_SUCCESS; UapRxPD *prx_pd; wlan_mgmt_pkt *puap_pkt_hdr = MNULL; RxPacketHdr_t *prx_pkt; pmlan_private priv = pmadapter->priv[pmbuf->bss_index]; t_u8 ta[MLAN_MAC_ADDR_LENGTH]; t_u16 rx_pkt_type = 0; sta_node *sta_ptr = MNULL; ENTER(); prx_pd = (UapRxPD *) (pmbuf->pbuf + pmbuf->data_offset); /* Endian conversion */ uap_endian_convert_RxPD(prx_pd); rx_pkt_type = prx_pd->rx_pkt_type; prx_pkt = (RxPacketHdr_t *) ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset); PRINTM(MINFO, "RX Data: data_len - prx_pd->rx_pkt_offset = %d - %d = %d\n", pmbuf->data_len, prx_pd->rx_pkt_offset, pmbuf->data_len - prx_pd->rx_pkt_offset); if ((prx_pd->rx_pkt_offset + prx_pd->rx_pkt_length) > (t_u16) pmbuf->data_len) { PRINTM(MERROR, "Wrong rx packet: len=%d,rx_pkt_offset=%d," " rx_pkt_length=%d\n", pmbuf->data_len, prx_pd->rx_pkt_offset, prx_pd->rx_pkt_length); pmbuf->status_code = MLAN_ERROR_PKT_SIZE_INVALID; ret = MLAN_STATUS_FAILURE; wlan_free_mlan_buffer(pmadapter, pmbuf); goto done; } pmbuf->data_len = prx_pd->rx_pkt_offset + prx_pd->rx_pkt_length; if (pmadapter->priv[pmbuf->bss_index]->mgmt_frame_passthru_mask && prx_pd->rx_pkt_type == PKT_TYPE_MGMT_FRAME) { /* Check if this is mgmt packet and needs to forwarded to app as an event */ puap_pkt_hdr = (wlan_mgmt_pkt *) ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset); puap_pkt_hdr->frm_len = wlan_le16_to_cpu(puap_pkt_hdr->frm_len); if ((puap_pkt_hdr->wlan_header. frm_ctl & IEEE80211_FC_MGMT_FRAME_TYPE_MASK) == 0) wlan_process_802dot11_mgmt_pkt(pmadapter->priv[pmbuf->bss_index], (t_u8 *) & puap_pkt_hdr->wlan_header, puap_pkt_hdr->frm_len + sizeof(wlan_mgmt_pkt) - sizeof(puap_pkt_hdr->frm_len)); wlan_free_mlan_buffer(pmadapter, pmbuf); goto done; } pmbuf->priority = prx_pd->priority; memcpy(pmadapter, ta, prx_pkt->eth803_hdr.src_addr, MLAN_MAC_ADDR_LENGTH); if ((rx_pkt_type != PKT_TYPE_BAR) && (prx_pd->priority < MAX_NUM_TID)) { if ((sta_ptr = wlan_get_station_entry(priv, ta))) sta_ptr->rx_seq[prx_pd->priority] = prx_pd->seq_num; } /* check if UAP enable 11n */ if (!priv->is_11n_enabled || (!wlan_11n_get_rxreorder_tbl ((mlan_private *) priv, prx_pd->priority, ta) && (prx_pd->rx_pkt_type != PKT_TYPE_AMSDU) )) { if (priv->pkt_fwd) wlan_process_uap_rx_packet(priv, pmbuf); else wlan_upload_uap_rx_packet(pmadapter, pmbuf); goto done; } /* Reorder and send to OS */ if ((ret = mlan_11n_rxreorder_pkt(priv, prx_pd->seq_num, prx_pd->priority, ta, (t_u8) prx_pd->rx_pkt_type, (void *) pmbuf)) || (rx_pkt_type == PKT_TYPE_BAR)) { wlan_free_mlan_buffer(pmadapter, pmbuf); } done: if (priv->is_11n_enabled && (pmadapter->pending_bridge_pkts >= RX_MED_THRESHOLD)) wlan_send_delba_to_all_in_reorder_tbl(priv); LEAVE(); return ret; } /** * @brief This function processes received packet and forwards it * to kernel/upper layer or send back to firmware * * @param priv A pointer to mlan_private * @param pmbuf A pointer to mlan_buffer which includes the received packet * * @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE */ mlan_status wlan_uap_recv_packet(IN mlan_private * priv, IN pmlan_buffer pmbuf) { pmlan_adapter pmadapter = priv->adapter; mlan_status ret = MLAN_STATUS_SUCCESS; RxPacketHdr_t *prx_pkt; pmlan_buffer newbuf = MNULL; ENTER(); prx_pkt = (RxPacketHdr_t *) ((t_u8 *) pmbuf->pbuf + pmbuf->data_offset); DBG_HEXDUMP(MDAT_D, "uap_recv_packet", pmbuf->pbuf + pmbuf->data_offset, MIN(pmbuf->data_len, MAX_DATA_DUMP_LEN)); PRINTM(MDATA, "AMSDU dest %02x:%02x:%02x:%02x:%02x:%02x\n", prx_pkt->eth803_hdr.dest_addr[0], prx_pkt->eth803_hdr.dest_addr[1], prx_pkt->eth803_hdr.dest_addr[2], prx_pkt->eth803_hdr.dest_addr[3], prx_pkt->eth803_hdr.dest_addr[4], prx_pkt->eth803_hdr.dest_addr[5]); /* don't do packet forwarding in disconnected state */ if ((priv->media_connected == MFALSE) || (pmbuf->data_len > MV_ETH_FRAME_LEN)) goto upload; if (prx_pkt->eth803_hdr.dest_addr[0] & 0x01) { if (!(priv->pkt_fwd & PKT_FWD_INTRA_BCAST)) { /* Multicast pkt */ if ((newbuf = wlan_alloc_mlan_buffer(pmadapter, MLAN_TX_DATA_BUF_SIZE_2K, 0, MTRUE))) { newbuf->bss_index = pmbuf->bss_index; newbuf->buf_type = pmbuf->buf_type; newbuf->priority = pmbuf->priority; newbuf->in_ts_sec = pmbuf->in_ts_sec; newbuf->in_ts_usec = pmbuf->in_ts_usec; newbuf->data_offset = (sizeof(UapTxPD) + INTF_HEADER_LEN + DMA_ALIGNMENT); pmadapter->pending_bridge_pkts++; newbuf->flags |= MLAN_BUF_FLAG_BRIDGE_BUF; /* copy the data */ memcpy(pmadapter, (t_u8 *) newbuf->pbuf + newbuf->data_offset, pmbuf->pbuf + pmbuf->data_offset, pmbuf->data_len); newbuf->data_len = pmbuf->data_len; wlan_wmm_add_buf_txqueue(pmadapter, newbuf); if (pmadapter->pending_bridge_pkts > RX_HIGH_THRESHOLD) wlan_drop_tx_pkts(priv); } } } else { if ((!(priv->pkt_fwd & PKT_FWD_INTRA_UCAST)) && (wlan_get_station_entry(priv, prx_pkt->eth803_hdr.dest_addr))) { /* Intra BSS packet */ if ((newbuf = wlan_alloc_mlan_buffer(pmadapter, MLAN_TX_DATA_BUF_SIZE_2K, 0, MTRUE))) { newbuf->bss_index = pmbuf->bss_index; newbuf->buf_type = pmbuf->buf_type; newbuf->priority = pmbuf->priority; newbuf->in_ts_sec = pmbuf->in_ts_sec; newbuf->in_ts_usec = pmbuf->in_ts_usec; newbuf->data_offset = (sizeof(UapTxPD) + INTF_HEADER_LEN + DMA_ALIGNMENT); pmadapter->pending_bridge_pkts++; newbuf->flags |= MLAN_BUF_FLAG_BRIDGE_BUF; /* copy the data */ memcpy(pmadapter, (t_u8 *) newbuf->pbuf + newbuf->data_offset, pmbuf->pbuf + pmbuf->data_offset, pmbuf->data_len); newbuf->data_len = pmbuf->data_len; wlan_wmm_add_buf_txqueue(pmadapter, newbuf); if (pmadapter->pending_bridge_pkts > RX_HIGH_THRESHOLD) wlan_drop_tx_pkts(priv); } goto done; } else if (MLAN_STATUS_FAILURE == wlan_check_unicast_packet(priv, prx_pkt->eth803_hdr.dest_addr)) { /* drop packet */ PRINTM(MDATA, "Drop AMSDU dest %02x:%02x:%02x:%02x:%02x:%02x\n", prx_pkt->eth803_hdr.dest_addr[0], prx_pkt->eth803_hdr.dest_addr[1], prx_pkt->eth803_hdr.dest_addr[2], prx_pkt->eth803_hdr.dest_addr[3], prx_pkt->eth803_hdr.dest_addr[4], prx_pkt->eth803_hdr.dest_addr[5]); goto done; } } upload: /** send packet to moal */ ret = pmadapter->callbacks.moal_recv_packet(pmadapter->pmoal_handle, pmbuf); done: LEAVE(); return ret; } /** * @brief This function processes received packet and forwards it * to kernel/upper layer or send back to firmware * * @param priv A pointer to mlan_private * @param pmbuf A pointer to mlan_buffer which includes the received packet * * @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE */ mlan_status wlan_process_uap_rx_packet(IN mlan_private * priv, IN pmlan_buffer pmbuf) { pmlan_adapter pmadapter = priv->adapter; mlan_status ret = MLAN_STATUS_SUCCESS; UapRxPD *prx_pd; RxPacketHdr_t *prx_pkt; pmlan_buffer newbuf = MNULL; ENTER(); prx_pd = (UapRxPD *) (pmbuf->pbuf + pmbuf->data_offset); prx_pkt = (RxPacketHdr_t *) ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset); DBG_HEXDUMP(MDAT_D, "uAP RxPD", prx_pd, MIN(sizeof(UapRxPD), MAX_DATA_DUMP_LEN)); DBG_HEXDUMP(MDAT_D, "uAP Rx Payload", ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset), MIN(prx_pd->rx_pkt_length, MAX_DATA_DUMP_LEN)); PRINTM(MINFO, "RX Data: data_len - prx_pd->rx_pkt_offset = %d - %d = %d\n", pmbuf->data_len, prx_pd->rx_pkt_offset, pmbuf->data_len - prx_pd->rx_pkt_offset); PRINTM(MDATA, "Rx dest %02x:%02x:%02x:%02x:%02x:%02x\n", prx_pkt->eth803_hdr.dest_addr[0], prx_pkt->eth803_hdr.dest_addr[1], prx_pkt->eth803_hdr.dest_addr[2], prx_pkt->eth803_hdr.dest_addr[3], prx_pkt->eth803_hdr.dest_addr[4], prx_pkt->eth803_hdr.dest_addr[5]); /* don't do packet forwarding in disconnected state */ /* don't do packet forwarding when packet > 1514 */ if ((priv->media_connected == MFALSE) || ((pmbuf->data_len - prx_pd->rx_pkt_offset) > MV_ETH_FRAME_LEN)) goto upload; if (prx_pkt->eth803_hdr.dest_addr[0] & 0x01) { if (!(priv->pkt_fwd & PKT_FWD_INTRA_BCAST)) { /* Multicast pkt */ if ((newbuf = wlan_alloc_mlan_buffer(pmadapter, MLAN_TX_DATA_BUF_SIZE_2K, 0, MTRUE))) { newbuf->bss_index = pmbuf->bss_index; newbuf->buf_type = pmbuf->buf_type; newbuf->priority = pmbuf->priority; newbuf->in_ts_sec = pmbuf->in_ts_sec; newbuf->in_ts_usec = pmbuf->in_ts_usec; newbuf->data_offset = (sizeof(UapTxPD) + INTF_HEADER_LEN + DMA_ALIGNMENT); pmadapter->pending_bridge_pkts++; newbuf->flags |= MLAN_BUF_FLAG_BRIDGE_BUF; /* copy the data, skip rxpd */ memcpy(pmadapter, (t_u8 *) newbuf->pbuf + newbuf->data_offset, pmbuf->pbuf + pmbuf->data_offset + prx_pd->rx_pkt_offset, pmbuf->data_len - prx_pd->rx_pkt_offset); newbuf->data_len = pmbuf->data_len - prx_pd->rx_pkt_offset; wlan_wmm_add_buf_txqueue(pmadapter, newbuf); if (pmadapter->pending_bridge_pkts > RX_HIGH_THRESHOLD) wlan_drop_tx_pkts(priv); } } } else { if ((!(priv->pkt_fwd & PKT_FWD_INTRA_UCAST)) && (wlan_get_station_entry(priv, prx_pkt->eth803_hdr.dest_addr))) { /* Forwarding Intra-BSS packet */ pmbuf->data_len -= prx_pd->rx_pkt_offset; pmbuf->data_offset += prx_pd->rx_pkt_offset; pmbuf->flags |= MLAN_BUF_FLAG_BRIDGE_BUF; pmadapter->pending_bridge_pkts++; wlan_wmm_add_buf_txqueue(pmadapter, pmbuf); if (pmadapter->pending_bridge_pkts > RX_HIGH_THRESHOLD) wlan_drop_tx_pkts(priv); goto done; } else if (MLAN_STATUS_FAILURE == wlan_check_unicast_packet(priv, prx_pkt->eth803_hdr.dest_addr)) { PRINTM(MDATA, "Drop Pkts: Rx dest %02x:%02x:%02x:%02x:%02x:%02x\n", prx_pkt->eth803_hdr.dest_addr[0], prx_pkt->eth803_hdr.dest_addr[1], prx_pkt->eth803_hdr.dest_addr[2], prx_pkt->eth803_hdr.dest_addr[3], prx_pkt->eth803_hdr.dest_addr[4], prx_pkt->eth803_hdr.dest_addr[5]); pmbuf->status_code = MLAN_ERROR_PKT_INVALID; wlan_free_mlan_buffer(pmadapter, pmbuf); goto done; } } upload: /* Chop off RxPD */ pmbuf->data_len -= prx_pd->rx_pkt_offset; pmbuf->data_offset += prx_pd->rx_pkt_offset; pmbuf->pparent = MNULL; pmadapter->callbacks.moal_get_system_time(pmadapter->pmoal_handle, &pmbuf->out_ts_sec, &pmbuf->out_ts_usec); PRINTM(MDATA, "%lu.%06lu : Data => kernel seq_num=%d tid=%d\n", pmbuf->out_ts_sec, pmbuf->out_ts_usec, prx_pd->seq_num, prx_pd->priority); ret = pmadapter->callbacks.moal_recv_packet(pmadapter->pmoal_handle, pmbuf); if (ret == MLAN_STATUS_FAILURE) { PRINTM(MERROR, "uAP Rx Error: moal_recv_packet returned error\n"); pmbuf->status_code = MLAN_ERROR_PKT_INVALID; } if (ret != MLAN_STATUS_PENDING) { wlan_free_mlan_buffer(pmadapter, pmbuf); } done: LEAVE(); return ret; }