s32 wilc_parse_network_info(u8 *msg_buffer,
struct network_info **ret_network_info)
{
struct network_info *network_info = NULL;
u8 msg_type = 0;
u8 msg_id = 0;
u16 msg_len = 0;
u16 wid_id = (u16)WID_NIL;
u16 wid_len = 0;
u8 *wid_val = NULL;
msg_type = msg_buffer[0];
if ('N' != msg_type)
return -EFAULT;
msg_id = msg_buffer[1];
msg_len = MAKE_WORD16(msg_buffer[2], msg_buffer[3]);
wid_id = MAKE_WORD16(msg_buffer[4], msg_buffer[5]);
wid_len = MAKE_WORD16(msg_buffer[6], msg_buffer[7]);
wid_val = &msg_buffer[8];
{
u8 *msa = NULL;
u16 rx_len = 0;
u8 *tim_elm = NULL;
u8 *ies = NULL;
u16 ies_len = 0;
u8 index = 0;
u32 tsf_lo;
u32 tsf_hi;
network_info = kzalloc(sizeof(*network_info), GFP_KERNEL);
if (!network_info)
return -ENOMEM;
network_info->rssi = wid_val[0];
msa = &wid_val[1];
rx_len = wid_len - 1;
network_info->cap_info = get_cap_info(msa);
network_info->tsf_lo = get_beacon_timestamp_lo(msa);
tsf_lo = get_beacon_timestamp_lo(msa);
tsf_hi = get_beacon_timestamp_hi(msa);
network_info->tsf_hi = tsf_lo | ((u64)tsf_hi << 32);
get_ssid(msa, network_info->ssid, &network_info->ssid_len);
get_BSSID(msa, network_info->bssid);
network_info->ch = get_current_channel_802_11n(msa, rx_len
+ FCS_LEN);
index = MAC_HDR_LEN + TIME_STAMP_LEN;
network_info->beacon_period = get_beacon_period(msa + index);
index += BEACON_INTERVAL_LEN + CAP_INFO_LEN;
tim_elm = get_tim_elm(msa, rx_len + FCS_LEN, index);
if (tim_elm)
network_info->dtim_period = tim_elm[3];
ies = &msa[TAG_PARAM_OFFSET];
ies_len = rx_len - TAG_PARAM_OFFSET;
if (ies_len > 0) {
network_info->ies = kmemdup(ies, ies_len, GFP_KERNEL);
if (!network_info->ies) {
kfree(network_info);
return -ENOMEM;
}
}
network_info->ies_len = ies_len;
}
*ret_network_info = network_info;
return 0;
}
void process_p2p_noa_attr(UWORD8 *attr_start_ptr, UWORD8 ie_len)
{
UWORD8 num = 0;
UWORD8 noa_index = 0;
UWORD16 index = 0;
UWORD16 attr_len = 0;
UWORD8 *noa = 0;
UWORD8 curr_ct_window = mget_p2p_CTW();
BOOL_T noa_update_flag = BFALSE;
BOOL_T ctwin_update_flag = BFALSE;
noa = p2p_get_attr(NOTICE_OF_ABSENCE, attr_start_ptr, ie_len, &attr_len);
/* If no NOA attribute is present then reset the CT Window and schedules */
if(NULL == noa)
{
if(get_num_noa_sched() != 0) /* NOA schedule was present earlier */
noa_update_flag = BTRUE;
if(curr_ct_window != 0) /* Non-zero CT Window was present earlier */
ctwin_update_flag = BTRUE;
mset_p2p_CTW(0);
reset_noa_dscr();
update_machw_noa_attr(ctwin_update_flag, noa_update_flag);
return;
}
/* Extract the NOA attrbiute Index - will be checked later. Process */
/* CT Window first since the index will not be updated even if CT Window */
/* is changed. */
noa_index = noa[index++];
/* Update the CT Window if the Opportunistic PS bit is set */
if((noa[index] & BIT7) == 0)
{
mset_p2p_CTW(0); /* No OppPS */
}
else
{
mset_p2p_CTW(noa[index] & 0x7F);
}
if(curr_ct_window != mget_p2p_CTW()) /* CT Window has been modified */
ctwin_update_flag = BTRUE;
index++; /* Skip the CTWindow and OppPS Parameters Field */
/* Check if the NOA attribute has changed by comparing the Index (which */
/* indicates the instance of the NOA schedule) with the saved global NOA */
/* index. If it has not changed, return without doing anything. */
if(noa_index != g_noa_index)
{
/* Update the global NOA instance index with the received instance value */
g_noa_index = noa_index;
/* NOA schedule has been modified */
noa_update_flag = BTRUE;
/* Reset the NOA descriptors */
reset_noa_dscr();
/* Process the attribute till the end is reached */
while(index < attr_len)
{
g_noa_dscr[num].cnt_typ = noa[index++];
g_noa_dscr[num].duration = MAKE_WORD32(MAKE_WORD16(noa[index],
noa[index + 1]),
MAKE_WORD16(noa[index + 2],
noa[index + 3]));
index += 4;
g_noa_dscr[num].interval = MAKE_WORD32(MAKE_WORD16(noa[index],
noa[index + 1]),
MAKE_WORD16(noa[index + 2],
noa[index + 3]));
index += 4;
g_noa_dscr[num].start_time = MAKE_WORD32(MAKE_WORD16(noa[index],
noa[index + 1]),
MAKE_WORD16(noa[index + 2],
noa[index + 3]));
index += 4;
/* Increment the number of NOA schedules extracted */
num++;
/* NUM_NOA_DSCR NOA schedules are processed, Remaining are ignored */
if (num >= NUM_NOA_DSCR)
break;
}
/* Update the number of NOA schedules */
set_num_noa_sched(num);
}
/* Update MAC HW with the NOA attribute values */
update_machw_noa_attr(ctwin_update_flag, noa_update_flag);
}
void update_11n_params_sta(UWORD8 *msa, UWORD16 offset, UWORD16 rx_len,
sta_entry_t *entry)
{
UWORD16 index = offset;
UWORD16 info_elem = 0;
UWORD8 mcs_bmp_index;
UWORD16 cap_info = 0;
ht_struct_t *ht_hdl = &(entry->ht_hdl);
ba_struct_t *ba_hdl = &(entry->ba_hdl);
UWORD8 is_ht_present = 0;
TROUT_FUNC_ENTER;
/* Update the capability information */
cap_info = get_cap_info(msa);
/* Update the Block ACK capability */
update_ba_cap(ba_hdl, cap_info);
while(index < (rx_len - FCS_LEN))
{
/* Search for HT Capabilities Element */
if(msa[index] == IHTCAP)
{
UWORD16 ofst = index;
is_ht_present = 1;
/* Presence of HT Capability Element implies the station is HT */
/* capable */
ht_hdl->ht_capable = 1;
ofst += IE_HDR_LEN;
/* Parse HT Capabilities Info Field */
info_elem = MAKE_WORD16(msa[ofst], msa[ofst + 1]);
/* LDPC Coding Capability */
ht_hdl->ldpc_cod_cap = (info_elem & BIT0);
/* Channel Width Element is initialized by the channel width */
/* supported field. This will subsequently be overidden by the */
/* STA-Channel Width field of the HT-Operation Element */
ht_hdl->chan_width = ((info_elem & BIT1) >> 1);
/* Extract the SMPS mode B2 & B3 */
{
UWORD8 smps = (info_elem & 0x000C);
if(smps == STATIC_SMPS)
ht_hdl->smps_mode = STATIC_MODE;
else if(smps == DYNAMIC_SMPS)
ht_hdl->smps_mode = DYNAMIC_MODE;
else if(smps == SM_ENABLED)
ht_hdl->smps_mode = MIMO_MODE;
}
/* Extract support for reception of Greenfield packets */
ht_hdl->greenfield = ((info_elem & BIT4) >> 4);
/* Extract Short-GI support for reception of 20MHz packets */
ht_hdl->short_gi_20 = ((info_elem & BIT5) >> 5);
/* Extract Short-GI support for reception of 40MHz packets */
ht_hdl->short_gi_40 = ((info_elem & BIT6) >> 6);
/* Extract STBC reception capability */
ht_hdl->rx_stbc = ((info_elem & 0x30) >> 8);
/* Extract AMSDU max-size field */
if(0 == (info_elem & BIT11))
ht_hdl->sta_amsdu_maxsize = 3839;
else
ht_hdl->sta_amsdu_maxsize = 7935;
/* DSSS/CCK Mode in 40 MHz */
ht_hdl->dsss_cck_40mhz = ((info_elem & BIT12) >> 12);
/* Extract support for L-SIG TXOP Protection */
ht_hdl->lsig_txop_prot = ((info_elem & BIT15) >> 15);
ofst += HT_CAPINFO_FIELD_LEN;
/* Parse A-MPDU Parameters Field */
/* Extract the Maximum Rx A-MPDU factor (B1 - B0) */
ht_hdl->max_rx_ampdu_factor = (msa[ofst] & 0x03);
/* Extract the Minimum MPDU Start Spacing (B2 - B4) */
ht_hdl->min_mpdu_start_spacing = (msa[ofst] >> 2) & 0x07;
ofst += AMPDU_PARAM_LEN;
/* Parse Supported MCS Set Field */
/* AND the Rx MCS bitmask with supported Tx MCS bitmask */
/* and reset the last 3 bits in the last */
/* byte since the bitmask is 77 bits */
for(mcs_bmp_index = 0; mcs_bmp_index < MCS_BITMASK_LEN;
mcs_bmp_index++)
{
ht_hdl->rx_mcs_bitmask[mcs_bmp_index] =
mget_SupportedMCSTxValue().mcs_bmp[mcs_bmp_index] &
(*(UWORD8 *)(msa + ofst + mcs_bmp_index));
}
ht_hdl->rx_mcs_bitmask[MCS_BITMASK_LEN - 1] &= 0x1F;
ofst += MCS_SET_FIELD_LEN;
/* Parse HT Extended Capabilities Info Field */
info_elem = MAKE_WORD16(msa[ofst], msa[ofst + 1]);
/* Extract HTC support Information */
if((info_elem & BIT10) != 0)
ht_hdl->htc_support = 1;
ofst += HT_EXTCAP_FIELD_LEN;
/* Parse Tx Beamforming Field */
ofst += TX_BF_FIELD_LEN;
/* Parse ASEL Capabilities Field */
ofst += ASEL_FIELD_LEN;
}
/* Increment index by length information & tag header */
index += msa[index + 1] + IE_HDR_LEN;
}
/**
* @brief parses the received 'N' message
* @details
* @param[in] pu8MsgBuffer The message to be parsed
* @param[out] ppstrNetworkInfo pointer to pointer to the structure containing the parsed Network Info
* @return Error code indicating success/failure
* @note
* @author mabubakr
* @date 1 Mar 2012
* @version 1.0
*/
s32 parse_network_info(u8 *pu8MsgBuffer, tstrNetworkInfo **ppstrNetworkInfo)
{
tstrNetworkInfo *pstrNetworkInfo = NULL;
u8 u8MsgType = 0;
u8 u8MsgID = 0;
u16 u16MsgLen = 0;
u16 u16WidID = (u16)WID_NIL;
u16 u16WidLen = 0;
u8 *pu8WidVal = NULL;
u8MsgType = pu8MsgBuffer[0];
/* Check whether the received message type is 'N' */
if ('N' != u8MsgType) {
PRINT_ER("Received Message format incorrect.\n");
return -EFAULT;
}
/* Extract message ID */
u8MsgID = pu8MsgBuffer[1];
/* Extract message Length */
u16MsgLen = MAKE_WORD16(pu8MsgBuffer[2], pu8MsgBuffer[3]);
/* Extract WID ID */
u16WidID = MAKE_WORD16(pu8MsgBuffer[4], pu8MsgBuffer[5]);
/* Extract WID Length */
u16WidLen = MAKE_WORD16(pu8MsgBuffer[6], pu8MsgBuffer[7]);
/* Assign a pointer to the WID value */
pu8WidVal = &pu8MsgBuffer[8];
/* parse the WID value of the WID "WID_NEWORK_INFO" */
{
u8 *pu8msa = NULL;
u16 u16RxLen = 0;
u8 *pu8TimElm = NULL;
u8 *pu8IEs = NULL;
u16 u16IEsLen = 0;
u8 u8index = 0;
u32 u32Tsf_Lo;
u32 u32Tsf_Hi;
pstrNetworkInfo = kzalloc(sizeof(tstrNetworkInfo), GFP_KERNEL);
if (!pstrNetworkInfo)
return -ENOMEM;
pstrNetworkInfo->s8rssi = pu8WidVal[0];
/* Assign a pointer to msa "Mac Header Start Address" */
pu8msa = &pu8WidVal[1];
u16RxLen = u16WidLen - 1;
/* parse msa*/
/* Get the cap_info */
pstrNetworkInfo->u16CapInfo = get_cap_info(pu8msa);
/* Get time-stamp [Low only 32 bit] */
pstrNetworkInfo->u32Tsf = get_beacon_timestamp_lo(pu8msa);
PRINT_D(CORECONFIG_DBG, "TSF :%x\n", pstrNetworkInfo->u32Tsf);
/* Get full time-stamp [Low and High 64 bit] */
u32Tsf_Lo = get_beacon_timestamp_lo(pu8msa);
u32Tsf_Hi = get_beacon_timestamp_hi(pu8msa);
pstrNetworkInfo->u64Tsf = u32Tsf_Lo | ((u64)u32Tsf_Hi << 32);
/* Get SSID */
get_ssid(pu8msa, pstrNetworkInfo->au8ssid, &pstrNetworkInfo->u8SsidLen);
/* Get BSSID */
get_BSSID(pu8msa, pstrNetworkInfo->au8bssid);
/*
* Extract current channel information from
* the beacon/probe response frame
*/
pstrNetworkInfo->u8channel = get_current_channel_802_11n(pu8msa,
u16RxLen + FCS_LEN);
/* Get beacon period */
u8index = MAC_HDR_LEN + TIME_STAMP_LEN;
pstrNetworkInfo->u16BeaconPeriod = get_beacon_period(pu8msa + u8index);
u8index += BEACON_INTERVAL_LEN + CAP_INFO_LEN;
/* Get DTIM Period */
pu8TimElm = get_tim_elm(pu8msa, u16RxLen + FCS_LEN, u8index);
if (pu8TimElm != NULL)
pstrNetworkInfo->u8DtimPeriod = pu8TimElm[3];
pu8IEs = &pu8msa[MAC_HDR_LEN + TIME_STAMP_LEN + BEACON_INTERVAL_LEN + CAP_INFO_LEN];
u16IEsLen = u16RxLen - (MAC_HDR_LEN + TIME_STAMP_LEN + BEACON_INTERVAL_LEN + CAP_INFO_LEN);
if (u16IEsLen > 0) {
pstrNetworkInfo->pu8IEs = kmemdup(pu8IEs, u16IEsLen,
GFP_KERNEL);
if (!pstrNetworkInfo->pu8IEs)
return -ENOMEM;
}
pstrNetworkInfo->u16IEsLen = u16IEsLen;
}
*ppstrNetworkInfo = pstrNetworkInfo;
return 0;
}
