p80211frm.c

Linux的无线局域网方案是一个Linux设备驱动程序和子系统 一揽子方案的用意是提供全系列的IEEE 802.11标准的Mac 管理功能

        f->reason	= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                              + WLAN_DISASSOC_OFF_REASON);

        /*-- Information elements */

        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_encode_assocreq
*
* Receives an fr_mgmt struct with its len and buf set.  Fills
* in the rest of the members as far as possible.  On entry len
* is the length of the buffer, on return len is the actual length
* of the frame with all the currently encoded fields.  For 
* frames where the caller adds variable/optional IEs, the caller
* will have to update the len field.
* On entry Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len, buf, and priv are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_encode_assocreq( wlan_fr_assocreq_t  *f )
{
        f->type = WLAN_FSTYPE_ASSOCREQ;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT( f->len >= WLAN_ASSOCREQ_FR_MAXLEN );

        /*-- Fixed Fields ----*/
        f->cap_info		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_ASSOCREQ_OFF_CAP_INFO);
        f->listen_int	= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                  + WLAN_ASSOCREQ_OFF_LISTEN_INT);

        f->len = WLAN_HDR_A3_LEN +
                 WLAN_ASSOCREQ_OFF_LISTEN_INT +
                 sizeof(*(f->listen_int));

        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_decode_assocreq
*
* Given a complete frame in f->buf, sets the pointers in f to 
* the areas that correspond to the parts of the frame.
*
* Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len and buf are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_decode_assocreq( wlan_fr_assocreq_t  *f )
{
        wlan_ie_t	*ie_ptr;

        f->type = WLAN_FSTYPE_ASSOCREQ;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT(WLAN_FTYPE_MGMT ==
                    WLAN_GET_FC_FTYPE(ieee2host16(f->hdr->a3.fc)));
        WLAN_ASSERT(WLAN_FSTYPE_ASSOCREQ ==
                    WLAN_GET_FC_FSTYPE(ieee2host16(f->hdr->a3.fc)));

        /*-- Fixed Fields ----*/
        f->cap_info		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_ASSOCREQ_OFF_CAP_INFO);
        f->listen_int	= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                  + WLAN_ASSOCREQ_OFF_LISTEN_INT);

        /*-- Information elements */
        ie_ptr = (wlan_ie_t*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                              + WLAN_ASSOCREQ_OFF_SSID);
        while( ((UINT8*)ie_ptr) < (f->buf + f->len) ) {
                switch (ie_ptr->eid) {
                case WLAN_EID_SSID:
                        f->ssid = (wlan_ie_ssid_t*)ie_ptr;
                        break;
                case WLAN_EID_SUPP_RATES:
                        f->supp_rates = (wlan_ie_supp_rates_t*)ie_ptr;
                        break;
                default:
                        WLAN_LOG_WARNING1(
                                "Unrecognized EID=%dd in assocreq decode.\n",
                                ie_ptr->eid);
                        WLAN_HEX_DUMP(3, "frm w/ bad eid:", f->buf, f->len );
                        break;
                }
                ie_ptr = (wlan_ie_t*)(((UINT8*)ie_ptr) + 2 + ie_ptr->len);
        }
        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_encode_assocresp
*
* Receives an fr_mgmt struct with its len and buf set.  Fills
* in the rest of the members as far as possible.  On entry len
* is the length of the buffer, on return len is the actual length
* of the frame with all the currently encoded fields.  For 
* frames where the caller adds variable/optional IEs, the caller
* will have to update the len field.
* On entry Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len, buf, and priv are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_encode_assocresp( wlan_fr_assocresp_t  *f )
{
        f->type = WLAN_FSTYPE_ASSOCRESP;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT( f->len >= WLAN_ASSOCRESP_FR_MAXLEN );

        /*-- Fixed Fields ----*/
        f->cap_info		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_ASSOCRESP_OFF_CAP_INFO);
        f->status		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                               + WLAN_ASSOCRESP_OFF_STATUS);
        f->aid			= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                             + WLAN_ASSOCRESP_OFF_AID);

        f->len = WLAN_HDR_A3_LEN + WLAN_ASSOCRESP_OFF_AID + sizeof(*(f->aid));

        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_decode_assocresp
*
* Given a complete frame in f->buf, sets the pointers in f to 
* the areas that correspond to the parts of the frame.
*
* Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len and buf are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_decode_assocresp( wlan_fr_assocresp_t  *f )
{
        f->type = WLAN_FSTYPE_ASSOCRESP;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT(WLAN_FTYPE_MGMT ==
                    WLAN_GET_FC_FTYPE(ieee2host16(f->hdr->a3.fc)));
        WLAN_ASSERT(WLAN_FSTYPE_ASSOCRESP ==
                    WLAN_GET_FC_FSTYPE(ieee2host16(f->hdr->a3.fc)));

        /*-- Fixed Fields ----*/
        f->cap_info		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_ASSOCRESP_OFF_CAP_INFO);
        f->status		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                               + WLAN_ASSOCRESP_OFF_STATUS);
        f->aid			= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                             + WLAN_ASSOCRESP_OFF_AID);

        /*-- Information elements */
        f->supp_rates	= (wlan_ie_supp_rates_t*)
                        (WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                         + WLAN_ASSOCRESP_OFF_SUPP_RATES);

        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_encode_reassocreq
*
* Receives an fr_mgmt struct with its len and buf set.  Fills
* in the rest of the members as far as possible.  On entry len
* is the length of the buffer, on return len is the actual length
* of the frame with all the currently encoded fields.  For 
* frames where the caller adds variable/optional IEs, the caller
* will have to update the len field.
* On entry Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len, buf, and priv are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_encode_reassocreq( wlan_fr_reassocreq_t  *f )
{
        f->type = WLAN_FSTYPE_REASSOCREQ;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT( f->len >= WLAN_REASSOCREQ_FR_MAXLEN );

        /*-- Fixed Fields ----*/
        f->cap_info		=(UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                + WLAN_REASSOCREQ_OFF_CAP_INFO);
        f->listen_int	=(UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_REASSOCREQ_OFF_LISTEN_INT);
        f->curr_ap		=(UINT8*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                              + WLAN_REASSOCREQ_OFF_CURR_AP);

        f->len = WLAN_HDR_A3_LEN + WLAN_REASSOCREQ_OFF_CURR_AP + sizeof(*(f->curr_ap));

        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_decode_reassocreq
*
* Given a complete frame in f->buf, sets the pointers in f to 
* the areas that correspond to the parts of the frame.
*
* Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len and buf are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_decode_reassocreq( wlan_fr_reassocreq_t  *f )
{
        wlan_ie_t	*ie_ptr;

        f->type = WLAN_FSTYPE_REASSOCREQ;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT(WLAN_FTYPE_MGMT ==
                    WLAN_GET_FC_FTYPE(ieee2host16(f->hdr->a3.fc)));
        WLAN_ASSERT(WLAN_FSTYPE_REASSOCREQ ==
                    WLAN_GET_FC_FSTYPE(ieee2host16(f->hdr->a3.fc)));

        /*-- Fixed Fields ----*/
        f->cap_info		=(UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                + WLAN_REASSOCREQ_OFF_CAP_INFO);
        f->listen_int	=(UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_REASSOCREQ_OFF_LISTEN_INT);
        f->curr_ap		=(UINT8*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                              + WLAN_REASSOCREQ_OFF_CURR_AP);

        /*-- Information elements */
        ie_ptr = (wlan_ie_t*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                              + WLAN_REASSOCREQ_OFF_SSID);
        while( ((UINT8*)ie_ptr) < (f->buf + f->len) ) {
                switch (ie_ptr->eid) {
                case WLAN_EID_SSID:
                        f->ssid = (wlan_ie_ssid_t*)ie_ptr;
                        break;
                case WLAN_EID_SUPP_RATES:
                        f->supp_rates = (wlan_ie_supp_rates_t*)ie_ptr;
                        break;
                default:
                        WLAN_LOG_WARNING1(
                                "Unrecognized EID=%dd in reassocreq decode.\n",
                                ie_ptr->eid);
                        WLAN_HEX_DUMP(3, "frm w/ bad eid:", f->buf, f->len );
                        break;
                }
                ie_ptr = (wlan_ie_t*)(((UINT8*)ie_ptr) + 2 + ie_ptr->len);
        }
        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_encode_reassocresp
*
* Receives an fr_mgmt struct with its len and buf set.  Fills
* in the rest of the members as far as possible.  On entry len
* is the length of the buffer, on return len is the actual length
* of the frame with all the currently encoded fields.  For 
* frames where the caller adds variable/optional IEs, the caller
* will have to update the len field.
* On entry Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len, buf, and priv are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_encode_reassocresp( wlan_fr_reassocresp_t  *f )
{
        f->type = WLAN_FSTYPE_REASSOCRESP;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT( f->len >= WLAN_REASSOCRESP_FR_MAXLEN );

        /*-- Fixed Fields ----*/
        f->cap_info		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_REASSOCRESP_OFF_CAP_INFO);
        f->status		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                               + WLAN_REASSOCRESP_OFF_STATUS);
        f->aid			= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                             + WLAN_REASSOCRESP_OFF_AID);

        f->len = WLAN_HDR_A3_LEN + WLAN_REASSOCRESP_OFF_AID + sizeof(*(f->aid));

        return;
}


/*--------------------------------------------------------------
* wlan_mgmt_decode_reassocresp
*
* Given a complete frame in f->buf, sets the pointers in f to 
* the areas that correspond to the parts of the frame.
*
* Assumptions:
*	1) f->len and f->buf are already set
*	2) f->len is the length of the MAC header + data, the CRC
*	   is NOT included
*	3) all members except len and buf are zero
*
* Arguments:
*	f	frame structure 
*
* Returns:
*	nothing
*
* Side effects:
*	frame  structure members are pointing at their
*	respective portions of the frame buffer.
--------------------------------------------------------------*/
void wlan_mgmt_decode_reassocresp( wlan_fr_reassocresp_t  *f )
{
        f->type = WLAN_FSTYPE_REASSOCRESP;
        f->hdr = (p80211_hdr_t*)f->buf;

        WLAN_ASSERT(WLAN_FTYPE_MGMT ==
                    WLAN_GET_FC_FTYPE(ieee2host16(f->hdr->a3.fc)));
        WLAN_ASSERT(WLAN_FSTYPE_REASSOCRESP ==
                    WLAN_GET_FC_FSTYPE(ieee2host16(f->hdr->a3.fc)));

        /*-- Fixed Fields ----*/
        f->cap_info		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                                 + WLAN_REASSOCRESP_OFF_CAP_INFO);
        f->status		= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                               + WLAN_REASSOCRESP_OFF_STATUS);
        f->aid			= (UINT16*)(WLAN_HDR_A3_DATAP(&(f->hdr->a3))
                             + WLAN_REASSOCRESP_OFF_AID);

        /*-- Information elements */
        f->supp_rates	= (wlan_ie_supp_rates_t*)