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Commit f9c4ca79 authored by Pankaj Singh's avatar Pankaj Singh
Browse files

wlan: Add preauth node when SAE auth frame is received 

Add preauth node and mark state as eLIM_MLM_WT_SAE_AUTH_STATE
(waiting for SAE authentication) when SAE auth frame is received
from peer.State can be moved to authenticated when hostapd sends
SAE authentication status as success.

Change-Id: I7e1c326d54465d2bae86a9b0de5152196a9ce359
CRs-Fixed: 2734661
parent 19a60dcc

CORE/MAC/src/pe/lim/limProcessAuthFrame.c

+61 −2
Original line number Diff line number Diff line
@@ -102,6 +102,46 @@ static inline unsigned int isAuthValid(tpAniSirGlobal pMac, tpSirMacAuthFrameBod 
}



#ifdef WLAN_FEATURE_SAE

/**

 * lim_external_auth_add_pre_auth_node()- Add preauth node for the peer

 *                                        performing external authentication

 * @mac_ctx: MAC context

 * @mac_hdr: Mac header of the packet

 * @mlm_state: MLM state to be marked to track SAE authentication

 *

 * Return: None

 */

static void lim_external_auth_add_pre_auth_node(tpAniSirGlobal mac_ctx,

                                                tpSirMacMgmtHdr mac_hdr,

                                                tLimMlmStates mlm_state)

{

    struct tLimPreAuthNode *auth_node;

    tpLimPreAuthTable preauth_table = &mac_ctx->lim.gLimPreAuthTimerTable;



    limLog(mac_ctx, LOG1, FL("=======> eSIR_AUTH_TYPE_SAE"));

    /* Create entry for this STA in pre-auth list */

    auth_node = limAcquireFreePreAuthNode(mac_ctx, preauth_table);

    if (!auth_node) {

        limLog(mac_ctx, LOG1,

                "Max pre-auth nodes reached " MAC_ADDRESS_STR,

                MAC_ADDR_ARRAY(mac_hdr->sa));

        return;

    }

    limLog(mac_ctx, LOG1,

            "Creating preauth node for SAE peer " MAC_ADDRESS_STR,

            MAC_ADDR_ARRAY(mac_hdr->sa));

    vos_mem_copy((uint8_t *)auth_node->peerMacAddr,

                mac_hdr->sa, sizeof(tSirMacAddr));

    auth_node->mlmState = mlm_state;

    auth_node->authType = eSIR_AUTH_TYPE_SAE;

    auth_node->timestamp = vos_timer_get_system_ticks();

    auth_node->seqNo = ((mac_hdr->seqControl.seqNumHi << 4) |

                        (mac_hdr->seqControl.seqNumLo));

    auth_node->assoc_req.present = false;

    limAddPreAuthNode(mac_ctx, auth_node);

}





/**

 * lim_process_sae_auth_frame()-Process SAE authentication frame

 * @mac_ctx: MAC context
@@ -128,8 +168,27 @@ static void lim_process_sae_auth_frame(tpAniSirGlobal mac_ctx, 
               FL("received SAE auth response in unexpected state %x"),

               pe_session->limMlmState);



    if(LIM_IS_AP_ROLE(pe_session))

    if(LIM_IS_AP_ROLE(pe_session)) {

            struct tLimPreAuthNode *sta_pre_auth_ctx;



            rx_flags = RXMGMT_FLAG_EXTERNAL_AUTH;

            /* Add preauth node when the first SAE authentication frame

             * is received and mark state as authenticating.

             * It's not good to track SAE authentication frames with

             * authTransactionSeqNumber as it's subjected to

             * SAE protocol optimizations.

             */

            /* Extract pre-auth context for the STA, if any. */

            sta_pre_auth_ctx = limSearchPreAuthList(mac_ctx,

                                                    mac_hdr->sa);

            if (!sta_pre_auth_ctx ||

                (sta_pre_auth_ctx->mlmState != eLIM_MLM_WT_SAE_AUTH_STATE &&

                sta_pre_auth_ctx->mlmState !=

                eLIM_MLM_AUTHENTICATED_STATE)) {

                    lim_external_auth_add_pre_auth_node(mac_ctx, mac_hdr,

                                                    eLIM_MLM_WT_SAE_AUTH_STATE);

            }

    }



    limSendSmeMgmtFrameInd(mac_ctx, pe_session->peSessionId,

                           rx_pkt_info, pe_session,