/******************************************************************************
*
* Name: HandleRxReadyEvent()
*
* Description: Rx ready event handler
*
* Arguments: PMRVDRV_ADAPTER Adapter
*
* Return Value:
*
* Notes:
*
*****************************************************************************/
VOID
HandleRxReadyEvent(
IN PMRVDRV_ADAPTER Adapter
)
{
int IsRxOK = 0;
PRxPD pRxPDCurrent;
PNDIS_PACKET pPacket;
NDIS_STATUS pStatus;
DBGPRINT(DBG_RX | DBG_HELP,(L"+HandleRxReadyEvent()\n"));
pRxPDCurrent = (PRxPD)(Adapter->pRxPD1);
//lykao, 060905, begin
if (pRxPDCurrent->Status & MRVDRV_RXPD_STATUS_OK)
{
Adapter->RcvOK++;
Adapter->DirectedFramesRcvOK++;
wlan_compute_rssi(Adapter,pRxPDCurrent);
}
else
{
DBGPRINT(DBG_RX | DBG_WARNING,(L"WARNING: frame received with bad status\n"));
//dralee++ 09212005 for error handling
pPacket = Adapter->pRxCurPkt;
Adapter->pRxCurPkt = NULL;
if ( pPacket )
ReturnRxPacketDesc(Adapter,pPacket);
return;
}
pPacket = Adapter->pRxCurPkt;
Adapter->pRxCurPkt = NULL;
if (Adapter->MediaConnectStatus == NdisMediaStateConnected)
{
Adapter->ulRxByteInLastPeriod += Adapter->ulRxSize;
NDIS_SET_PACKET_STATUS(pPacket, NDIS_STATUS_SUCCESS);
NdisMIndicateReceivePacket(Adapter->MrvDrvAdapterHdl, &pPacket, 1);
pStatus = NDIS_GET_PACKET_STATUS(pPacket);
if ((pStatus == NDIS_STATUS_RESOURCES) || (pStatus == NDIS_STATUS_SUCCESS))
{
// return packet
DBGPRINT(DBG_RX|DBG_HELP, (L"Packet returned success or resources...\n"));
ReturnRxPacketDesc(Adapter,pPacket);
}
else
{
DBGPRINT(DBG_RX|DBG_ERROR, (L"Packet returned pending...\n"));
}
}
else
{
///pmkcache: bug#16956 ++
if (Adapter->bIsReconnectAssociation == TRUE)
{
Adapter->isPktPending = TRUE;
if ( Adapter->pPendedRxPkt )
{
NKDbgPrintfW( L"ERROR, a pended RX packet has not been process!!\r\n" );
}
Adapter->pPendedRxPkt = pPacket;
return;
}
///pmkcache: bug#16956 --
DBGPRINT(DBG_RX|DBG_ERROR, (L"Not connected, packet was dropped...\n"));
ReturnRxPacketDesc(Adapter,pPacket);
}
return;
}
/**
* @brief This function processes a received 802.11 packet and forwards it
* to kernel/upper layer
*
* @param priv A pointer to wlan_private
* @param skb A pointer to skb which includes the received packet
* @return 0 or -1
*/
static int process_rxed_802_11_packet(wlan_private * priv, struct sk_buff *skb)
{
wlan_adapter *adapter = priv->adapter;
int ret = 0;
struct rx80211packethdr *p_rx_pkt;
struct rxpd *prxpd;
struct rx_radiotap_hdr radiotap_hdr;
struct rx_radiotap_hdr *pradiotap_hdr;
lbs_deb_enter(LBS_DEB_RX);
p_rx_pkt = (struct rx80211packethdr *) skb->data;
prxpd = &p_rx_pkt->rx_pd;
// lbs_deb_hex(LBS_DEB_RX, "RX Data: Before chop rxpd", skb->data, min(skb->len, 100));
if (skb->len < (ETH_HLEN + 8 + sizeof(struct rxpd))) {
lbs_deb_rx("rx err: frame received wit bad length\n");
priv->stats.rx_length_errors++;
ret = 0;
goto done;
}
/*
* Check rxpd status and update 802.3 stat,
*/
if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK))) {
//lbs_deb_rx("rx err: frame received with bad status\n");
priv->stats.rx_errors++;
}
lbs_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
/* create the exported radio header */
if(priv->adapter->monitormode == WLAN_MONITOR_OFF) {
/* no radio header */
/* chop the rxpd */
skb_pull(skb, sizeof(struct rxpd));
}
else {
/* radiotap header */
radiotap_hdr.hdr.it_version = 0;
/* XXX must check this value for pad */
radiotap_hdr.hdr.it_pad = 0;
radiotap_hdr.hdr.it_len = cpu_to_le16 (sizeof(struct rx_radiotap_hdr));
radiotap_hdr.hdr.it_present = cpu_to_le32 (RX_RADIOTAP_PRESENT);
/* unknown values */
radiotap_hdr.flags = 0;
radiotap_hdr.chan_freq = 0;
radiotap_hdr.chan_flags = 0;
radiotap_hdr.antenna = 0;
/* known values */
radiotap_hdr.rate = convert_mv_rate_to_radiotap(prxpd->rx_rate);
/* XXX must check no carryout */
radiotap_hdr.antsignal = prxpd->snr + prxpd->nf;
radiotap_hdr.rx_flags = 0;
if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
radiotap_hdr.rx_flags |= IEEE80211_RADIOTAP_F_RX_BADFCS;
//memset(radiotap_hdr.pad, 0x11, IEEE80211_RADIOTAP_HDRLEN - 18);
/* chop the rxpd */
skb_pull(skb, sizeof(struct rxpd));
/* add space for the new radio header */
if ((skb_headroom(skb) < sizeof(struct rx_radiotap_hdr)) &&
pskb_expand_head(skb, sizeof(struct rx_radiotap_hdr), 0,
GFP_ATOMIC)) {
lbs_pr_alert("%s: couldn't pskb_expand_head\n",
__func__);
}
pradiotap_hdr =
(struct rx_radiotap_hdr *)skb_push(skb,
sizeof(struct
rx_radiotap_hdr));
memcpy(pradiotap_hdr, &radiotap_hdr,
sizeof(struct rx_radiotap_hdr));
}
/* Take the data rate from the rxpd structure
* only if the rate is auto
*/
if (adapter->auto_rate)
adapter->cur_rate = libertas_fw_index_to_data_rate(prxpd->rx_rate);
wlan_compute_rssi(priv, prxpd);
lbs_deb_rx("rx data: size of actual packet %d\n", skb->len);
priv->stats.rx_bytes += skb->len;
priv->stats.rx_packets++;
libertas_upload_rx_packet(priv, skb);
ret = 0;
done:
lbs_deb_leave_args(LBS_DEB_RX, "ret %d", ret);
return ret;
}
/**
* @brief This function processes received packet and forwards it
* to kernel/upper layer
*
* @param priv A pointer to wlan_private
* @param skb A pointer to skb which includes the received packet
* @return WLAN_STATUS_SUCCESS or WLAN_STATUS_FAILURE
*/
int
ProcessRxedPacket(wlan_private * priv, struct sk_buff *skb)
{
#ifdef WPRM_DRV
wlan_adapter *Adapter = priv->adapter;
#endif
int ret = WLAN_STATUS_SUCCESS;
RxPacketHdr_t *pRxPkt;
RxPD *pRxPD;
int hdrChop;
EthII_Hdr_t *pEthHdr;
u32 u32SkbLen = skb->len;
const u8 rfc1042_eth_hdr[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
ENTER();
pRxPkt = (RxPacketHdr_t *) skb->data;
pRxPD = &pRxPkt->rx_pd;
DBG_HEXDUMP(DAT_D, "Rx", skb->data, MIN(skb->len, MAX_DATA_DUMP_LEN));
if (skb->len < (ETH_HLEN + 8 + sizeof(RxPD))) {
PRINTM(ERROR, "RX Error: FRAME RECEIVED WITH BAD LENGTH\n");
priv->stats.rx_length_errors++;
ret = WLAN_STATUS_SUCCESS;
kfree_skb(skb);
goto done;
}
PRINTM(INFO, "RX Data: skb->len - sizeof(RxPd) = %d - %d = %d\n",
skb->len, sizeof(RxPD), skb->len - sizeof(RxPD));
HEXDUMP("RX Data: Dest", pRxPkt->eth803_hdr.dest_addr,
sizeof(pRxPkt->eth803_hdr.dest_addr));
HEXDUMP("RX Data: Src", pRxPkt->eth803_hdr.src_addr,
sizeof(pRxPkt->eth803_hdr.src_addr));
if (memcmp(&pRxPkt->rfc1042_hdr,
rfc1042_eth_hdr, sizeof(rfc1042_eth_hdr)) == 0) {
/*
* 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.
*/
pEthHdr = (EthII_Hdr_t *)
((u8 *) & pRxPkt->eth803_hdr
+ sizeof(pRxPkt->eth803_hdr) + sizeof(pRxPkt->rfc1042_hdr)
- sizeof(pRxPkt->eth803_hdr.dest_addr)
- sizeof(pRxPkt->eth803_hdr.src_addr)
- sizeof(pRxPkt->rfc1042_hdr.snap_type));
memcpy(pEthHdr->src_addr, pRxPkt->eth803_hdr.src_addr,
sizeof(pEthHdr->src_addr));
memcpy(pEthHdr->dest_addr, pRxPkt->eth803_hdr.dest_addr,
sizeof(pEthHdr->dest_addr));
/* Chop off the RxPD + the excess memory from the 802.2/llc/snap header
* that was removed
*/
hdrChop = (u8 *) pEthHdr - (u8 *) pRxPkt;
} else {
HEXDUMP("RX Data: LLC/SNAP",
(u8 *) & pRxPkt->rfc1042_hdr, sizeof(pRxPkt->rfc1042_hdr));
/* Chop off the RxPD */
hdrChop = (u8 *) & pRxPkt->eth803_hdr - (u8 *) pRxPkt;
}
/* Chop off the leading header bytes so the skb points to the start of
* either the reconstructed EthII frame or the 802.2/llc/snap frame
*/
skb_pull(skb, hdrChop);
u32SkbLen = skb->len;
wlan_compute_rssi(priv, pRxPD);
if (os_upload_rx_packet(priv, skb)) {
PRINTM(ERROR, "RX Error: os_upload_rx_packet" " returns failure\n");
ret = WLAN_STATUS_FAILURE;
goto done;
}
priv->stats.rx_bytes += u32SkbLen;
priv->stats.rx_packets++;
PRINTM(DATA, "Data => kernel\n");
#ifdef WPRM_DRV
WPRM_DRV_TRACING_PRINT();
/* increase traffic meter rx counter
and call measurement function to see
if we need to change FW power mode. */
wprm_rx_packet_cnt++;
wprm_traffic_measurement(priv, Adapter, FALSE);
#endif
ret = WLAN_STATUS_SUCCESS;
done:
LEAVE();
return (ret);
}
/**
* @brief This function processes received packet and forwards it
* to kernel/upper layer
*
* @param priv A pointer to wlan_private
* @param skb A pointer to skb which includes the received packet
* @return 0 or -1
*/
int libertas_process_rxed_packet(wlan_private * priv, struct sk_buff *skb)
{
wlan_adapter *adapter = priv->adapter;
int ret = 0;
struct rxpackethdr *p_rx_pkt;
struct rxpd *p_rx_pd;
int hdrchop;
struct ethhdr *p_ethhdr;
const u8 rfc1042_eth_hdr[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
lbs_deb_enter(LBS_DEB_RX);
if (priv->adapter->monitormode != WLAN_MONITOR_OFF)
return process_rxed_802_11_packet(priv, skb);
p_rx_pkt = (struct rxpackethdr *) skb->data;
p_rx_pd = &p_rx_pkt->rx_pd;
if (p_rx_pd->rx_control & RxPD_MESH_FRAME)
SET_MESH_FRAME(skb);
else
UNSET_MESH_FRAME(skb);
lbs_deb_hex(LBS_DEB_RX, "RX Data: Before chop rxpd", skb->data,
min_t(unsigned int, skb->len, 100));
if (skb->len < (ETH_HLEN + 8 + sizeof(struct rxpd))) {
lbs_deb_rx("rx err: frame received with bad length\n");
priv->stats.rx_length_errors++;
ret = 0;
goto done;
}
/*
* Check rxpd status and update 802.3 stat,
*/
if (!(p_rx_pd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK))) {
lbs_deb_rx("rx err: frame received with bad status\n");
lbs_pr_alert("rxpd not ok\n");
priv->stats.rx_errors++;
ret = 0;
goto done;
}
lbs_deb_rx("rx data: skb->len-sizeof(RxPd) = %d-%zd = %zd\n",
skb->len, sizeof(struct rxpd), skb->len - sizeof(struct rxpd));
lbs_deb_hex(LBS_DEB_RX, "RX Data: Dest", p_rx_pkt->eth803_hdr.dest_addr,
sizeof(p_rx_pkt->eth803_hdr.dest_addr));
lbs_deb_hex(LBS_DEB_RX, "RX Data: Src", p_rx_pkt->eth803_hdr.src_addr,
sizeof(p_rx_pkt->eth803_hdr.src_addr));
if (memcmp(&p_rx_pkt->rfc1042_hdr,
rfc1042_eth_hdr, sizeof(rfc1042_eth_hdr)) == 0) {
/*
* 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.
*/
p_ethhdr = (struct ethhdr *)
((u8 *) & p_rx_pkt->eth803_hdr
+ sizeof(p_rx_pkt->eth803_hdr) + sizeof(p_rx_pkt->rfc1042_hdr)
- sizeof(p_rx_pkt->eth803_hdr.dest_addr)
- sizeof(p_rx_pkt->eth803_hdr.src_addr)
- sizeof(p_rx_pkt->rfc1042_hdr.snap_type));
memcpy(p_ethhdr->h_source, p_rx_pkt->eth803_hdr.src_addr,
sizeof(p_ethhdr->h_source));
memcpy(p_ethhdr->h_dest, p_rx_pkt->eth803_hdr.dest_addr,
sizeof(p_ethhdr->h_dest));
/* Chop off the rxpd + the excess memory from the 802.2/llc/snap header
* that was removed
*/
hdrchop = (u8 *) p_ethhdr - (u8 *) p_rx_pkt;
} else {
lbs_deb_hex(LBS_DEB_RX, "RX Data: LLC/SNAP",
(u8 *) & p_rx_pkt->rfc1042_hdr,
sizeof(p_rx_pkt->rfc1042_hdr));
/* Chop off the rxpd */
hdrchop = (u8 *) & p_rx_pkt->eth803_hdr - (u8 *) p_rx_pkt;
}
/* Chop off the leading header bytes so the skb points to the start of
* either the reconstructed EthII frame or the 802.2/llc/snap frame
*/
skb_pull(skb, hdrchop);
/* Take the data rate from the rxpd structure
* only if the rate is auto
*/
if (adapter->auto_rate)
adapter->cur_rate = libertas_fw_index_to_data_rate(p_rx_pd->rx_rate);
wlan_compute_rssi(priv, p_rx_pd);
lbs_deb_rx("rx data: size of actual packet %d\n", skb->len);
priv->stats.rx_bytes += skb->len;
priv->stats.rx_packets++;
libertas_upload_rx_packet(priv, skb);
ret = 0;
done:
lbs_deb_leave_args(LBS_DEB_RX, "ret %d", ret);
return ret;
}
