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;
}
/**
* @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;
}