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/** @file mlan_sta_rx.c
*
* @brief This file contains the handling of RX in MLAN
* module.
*
* Copyright (C) 2008-2011, 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:
10/27/2008: initial version
********************************************************/
#include "mlan.h"
#include "mlan_join.h"
#include "mlan_util.h"
#include "mlan_fw.h"
#include "mlan_main.h"
#include "mlan_11n_aggr.h"
#include "mlan_11n_rxreorder.h"
/********************************************************
Local Variables
********************************************************/
/** Ethernet II header */
typedef struct
{
/** Ethernet II header destination address */
t_u8 dest_addr[MLAN_MAC_ADDR_LENGTH];
/** Ethernet II header source address */
t_u8 src_addr[MLAN_MAC_ADDR_LENGTH];
/** Ethernet II header length */
t_u16 ethertype;
} EthII_Hdr_t;
/********************************************************
Global Variables
********************************************************/
/********************************************************
Local Functions
********************************************************/
/********************************************************
Global 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
*/
mlan_status
wlan_process_rx_packet(pmlan_adapter pmadapter, pmlan_buffer pmbuf)
{
mlan_status ret = MLAN_STATUS_SUCCESS;
pmlan_private priv = pmadapter->priv[pmbuf->bss_index];
RxPacketHdr_t *prx_pkt;
RxPD *prx_pd;
int hdr_chop;
EthII_Hdr_t *peth_hdr;
t_u8 rfc1042_eth_hdr[MLAN_MAC_ADDR_LENGTH] =
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
t_u8 snap_oui_802_h[MLAN_MAC_ADDR_LENGTH] =
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
t_u8 appletalk_aarp_type[2] = { 0x80, 0xf3 };
t_u8 ipx_snap_type[2] = { 0x81, 0x37 };
ENTER();
prx_pd = (RxPD *) (pmbuf->pbuf + pmbuf->data_offset);
prx_pkt = (RxPacketHdr_t *) ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset);
/** Small debug type */
#define DBG_TYPE_SMALL 2
/** Size of debugging structure */
#define SIZE_OF_DBG_STRUCT 4
if (prx_pd->rx_pkt_type == PKT_TYPE_DEBUG) {
t_u8 dbgType;
dbgType = *(t_u8 *) & prx_pkt->eth803_hdr;
if (dbgType == DBG_TYPE_SMALL) {
PRINTM(MFW_D, "\n");
DBG_HEXDUMP(MFW_D, "FWDBG",
(t_s8 *) ((t_u8 *) & prx_pkt->eth803_hdr +
SIZE_OF_DBG_STRUCT), prx_pd->rx_pkt_length);
PRINTM(MFW_D, "FWDBG::\n");
}
goto done;
}
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);
HEXDUMP("RX Data: Dest", prx_pkt->eth803_hdr.dest_addr,
sizeof(prx_pkt->eth803_hdr.dest_addr));
HEXDUMP("RX Data: Src", prx_pkt->eth803_hdr.src_addr,
sizeof(prx_pkt->eth803_hdr.src_addr));
if ((memcmp(pmadapter, &prx_pkt->rfc1042_hdr,
snap_oui_802_h, sizeof(snap_oui_802_h)) == 0) ||
((memcmp(pmadapter, &prx_pkt->rfc1042_hdr,
rfc1042_eth_hdr, sizeof(rfc1042_eth_hdr)) == 0) &&
memcmp(pmadapter, &prx_pkt->rfc1042_hdr.snap_type,
appletalk_aarp_type, sizeof(appletalk_aarp_type)) &&
memcmp(pmadapter, &prx_pkt->rfc1042_hdr.snap_type,
ipx_snap_type, sizeof(ipx_snap_type)))) {
/*
* Replace the 803 header and rfc1042 header (llc/snap) with an
* EthernetII header, keep the src/dst and snap_type (ethertype).
* The firmware only passes up SNAP frames converting
* all RX Data from 802.11 to 802.2/LLC/SNAP frames.
* To create the Ethernet II, just move the src, dst address right
* before the snap_type.
*/
peth_hdr = (EthII_Hdr_t *)
((t_u8 *) & prx_pkt->eth803_hdr
+ sizeof(prx_pkt->eth803_hdr) + sizeof(prx_pkt->rfc1042_hdr)
- sizeof(prx_pkt->eth803_hdr.dest_addr)
- sizeof(prx_pkt->eth803_hdr.src_addr)
- sizeof(prx_pkt->rfc1042_hdr.snap_type));
memcpy(pmadapter, peth_hdr->src_addr, prx_pkt->eth803_hdr.src_addr,
sizeof(peth_hdr->src_addr));
memcpy(pmadapter, peth_hdr->dest_addr, prx_pkt->eth803_hdr.dest_addr,
sizeof(peth_hdr->dest_addr));
/* Chop off the RxPD + the excess memory from the 802.2/llc/snap header
that was removed. */
hdr_chop = (t_u32) ((t_ptr) peth_hdr - (t_ptr) prx_pd);
} else {
HEXDUMP("RX Data: LLC/SNAP",
(t_u8 *) & prx_pkt->rfc1042_hdr, sizeof(prx_pkt->rfc1042_hdr));
/* Chop off the RxPD */
hdr_chop = (t_u32) ((t_ptr) & prx_pkt->eth803_hdr - (t_ptr) prx_pd);
}
/* Chop off the leading header bytes so the it points to the start of
either the reconstructed EthII frame or the 802.2/llc/snap frame */
pmbuf->data_len -= hdr_chop;
pmbuf->data_offset += hdr_chop;
pmbuf->pparent = MNULL;
DBG_HEXDUMP(MDAT_D, "RxPD", (t_u8 *) prx_pd,
MIN(sizeof(RxPD), MAX_DATA_DUMP_LEN));
DBG_HEXDUMP(MDAT_D, "Rx Payload", ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset),
MIN(prx_pd->rx_pkt_length, MAX_DATA_DUMP_LEN));
priv->rxpd_rate = prx_pd->rx_rate;
priv->rxpd_htinfo = prx_pd->ht_info;
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) {
pmbuf->status_code = MLAN_ERROR_PKT_INVALID;
PRINTM(MERROR, "STA Rx Error: moal_recv_packet returned error\n");
}
done:
if (ret != MLAN_STATUS_PENDING) {
wlan_free_mlan_buffer(pmadapter, pmbuf);
}
LEAVE();
return ret;
}
/**
* @brief This function processes the received buffer
*
* @param adapter A pointer to mlan_adapter
* @param pmbuf A pointer to the received buffer
*
* @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
*/
mlan_status
wlan_ops_sta_process_rx_packet(IN t_void * adapter, IN pmlan_buffer pmbuf)
{
pmlan_adapter pmadapter = (pmlan_adapter) adapter;
mlan_status ret = MLAN_STATUS_SUCCESS;
RxPD *prx_pd;
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;
wlan_mgmt_pkt *pmgmt_pkt_hdr = MNULL;
ENTER();
prx_pd = (RxPD *) (pmbuf->pbuf + pmbuf->data_offset);
/* Endian conversion */
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);
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 */
pmgmt_pkt_hdr =
(wlan_mgmt_pkt *) ((t_u8 *) prx_pd + prx_pd->rx_pkt_offset);
pmgmt_pkt_hdr->frm_len = wlan_le16_to_cpu(pmgmt_pkt_hdr->frm_len);
if ((pmgmt_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 *) & pmgmt_pkt_hdr->
wlan_header,
pmgmt_pkt_hdr->frm_len +
sizeof(wlan_mgmt_pkt)
- sizeof(pmgmt_pkt_hdr->frm_len));
wlan_free_mlan_buffer(pmadapter, pmbuf);
goto done;
}
/*
* If the packet is not an unicast packet then send the packet
* directly to os. Don't pass thru rx reordering
*/
if (!IS_11N_ENABLED(priv) ||
memcmp(priv->adapter, priv->curr_addr, prx_pkt->eth803_hdr.dest_addr,
MLAN_MAC_ADDR_LENGTH)) {
wlan_process_rx_packet(pmadapter, pmbuf);
goto done;
}
if (queuing_ra_based(priv)) {
memcpy(pmadapter, ta, prx_pkt->eth803_hdr.src_addr,
MLAN_MAC_ADDR_LENGTH);
} else {
if ((rx_pkt_type != PKT_TYPE_BAR) && (prx_pd->priority < MAX_NUM_TID))
priv->rx_seq[prx_pd->priority] = prx_pd->seq_num;
memcpy(pmadapter, ta,
priv->curr_bss_params.bss_descriptor.mac_address,
MLAN_MAC_ADDR_LENGTH);
}
/* 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:
LEAVE();
return (ret);
}
|
