Problem configuring wireless card (setting SSID and other params)

Discussion in 'Wireless Networking' started by Serhiy Smirnov, Mar 6, 2005.

  1. Hello,

    I'm trying to configure my 802.11g wireless network card using
    DeviceIoControl and NDISUIO interface.

    First, I request current SSID from the card. Then I set it to my
    specific value using code below. Set operation returns success. And
    then I request SSID again to verify if the set operation really
    succeeded. But I get the same values as it was before my SET, so
    network card doesn't switch to new SSID. The same situation if I try
    to change infrastructure mode (OID_802_11_INFRASTRUCTURE_MODE) and
    configuration (OID_802_11_CONFIGURATION). Trying to do
    OID_802_11_DISASSOCIATE before sending or requesting any data returns
    success too but doesn't help.
    My be I'm missing some obvious things (wait, reset, additional

    Configuring card with manufacturer's utility works fine, howewer.

    I know about the issue that NDISUIO is now reserved for use by
    Windows, but with my own driver (derived from NDISUIO sample)
    situation is the same.
    Tested on systems with WinXP SP1 and SP2. WZC is turned off.

    Any siggestions, links, etc would be highly appreciated!


    requesting SSID value:

    UCHAR QueryBuffer[sizeof(NDISUIO_QUERY_OID) +

    pQueryOid = (PNDISUIO_QUERY_OID)&QueryBuffer[0];
    pQueryOid->Oid = OID_802_11_SSID;

    bSuccess = (BOOLEAN)DeviceIoControl(Handle,
    (LPVOID)&QueryBuffer[0], sizeof(QueryBuffer),
    (LPVOID)&QueryBuffer[0], sizeof(QueryBuffer),
    &BytesReturned, NULL);

    setting SSID value:

    UCHAR SetBuffer[sizeof(NDISUIO_SET_OID) - sizeof(ULONG) +

    pSetOid = (PNDISUIO_SET_OID)&SetBuffer[0];
    pSetOid->Oid = OID_802_11_SSID;

    PNDIS_802_11_SSID psSSID = (PNDIS_802_11_SSID)pSetOid->Data;
    psSSID->SsidLength = strlen((char *)pSrcSSID);
    memcpy(psSSID->Ssid, pSrcSSID, psSSID->SsidLength);

    bSuccess = (BOOLEAN)DeviceIoControl(Handle,
    (LPVOID)&SetBuffer[0], sizeof(SetBuffer),
    NULL, 0,
    &BytesReturned, NULL);
    Serhiy Smirnov, Mar 6, 2005
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  2. Serhiy Smirnov

    Guest Guest

    At least, Disassociate should work.
    So you might be doing something wrong - in our business every single bit

    Guest, Mar 7, 2005
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  3. Additional advice : Check in debugger ( windbg e.g.) if you send the same
    data as WZC to Ndisuio

    Arkady Frenkel, Mar 7, 2005
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