qcacld-3.0: Fix incorrect handling of encrypted auth managment frame

Fix incorrect handling of encrypted auth managment frame in case of
WEP shared encryption mode.

Authentication frame length is populated based on the auth transaction
sequence number. However this will not hold good for encrypted frame
from which we will not be able to decode the transaction sequence number.
Make use of the flag passed to lim_send_auth_mgmt_frame to decide if
the frame is encrypted or not and take necessary action.

Change-Id: I61df6a3e871965cd35128fe11925855d37bf81b9
CRs-Fixed: 999599

core/mac/src/pe/lim/lim_send_management_frames.c

@@ -2010,6 +2010,27 @@ lim_send_auth_mgmt_frame(tpAniSirGlobal mac_ctx,
 
 	sme_sessionid = session->smeSessionId;
 
+	if (wep_bit == LIM_WEP_IN_FC) {
+		/*
+		 * Auth frame3 to be sent with encrypted framebody
+		 *
+		 * Allocate buffer for Authenticaton frame of size
+		 * equal to management frame header length plus 2 bytes
+		 * each for auth algorithm number, transaction number,
+		 * status code, 128 bytes for challenge text and
+		 * 4 bytes each for IV & ICV.
+		 */
+		lim_log(mac_ctx, LOG1,
+			FL("Sending encrypted auth frame to " MAC_ADDRESS_STR
+			   "- wait_for_ack %d"), MAC_ADDR_ARRAY(peer_addr),
+			   wait_for_ack);
+
+		frame_len = sizeof(tSirMacMgmtHdr) + LIM_ENCR_AUTH_BODY_LEN;
+		body_len = LIM_ENCR_AUTH_BODY_LEN;
+
+		goto alloc_packet;
+	}
+
 	lim_log(mac_ctx, LOG1,
 		FL("Sending Auth seq# %d status %d (%d) wait_for_ack %d to "
 		MAC_ADDRESS_STR),
@@ -2084,35 +2105,18 @@ lim_send_auth_mgmt_frame(tpAniSirGlobal mac_ctx,
 		break;
 
 	case SIR_MAC_AUTH_FRAME_3:
-		if (wep_bit == LIM_WEP_IN_FC) {
-			/*
-			 * Auth frame3 to be sent with encrypted framebody
-			 *
-			 * Allocate buffer for Authenticaton frame of size
-			 * equal to management frame header length plus 2 bytes
-			 * each for auth algorithm number, transaction number,
-			 * status code, 128 bytes for challenge text and
-			 * 4 bytes each for IV & ICV.
-			 */
-
-			frame_len = sizeof(tSirMacMgmtHdr) +
-					LIM_ENCR_AUTH_BODY_LEN;
-			body_len = LIM_ENCR_AUTH_BODY_LEN;
-		} else {
-
-			/*
-			 * Auth frame3 to be sent without encrypted framebody
-			 *
-			 * Allocate buffer for Authenticaton frame of size equal
-			 * to management frame header length plus 2 bytes each
-			 * for auth algorithm number, transaction number and
-			 * status code.
-			 */
+		/*
+		 * Auth frame3 to be sent without encrypted framebody
+		 *
+		 * Allocate buffer for Authenticaton frame of size equal
+		 * to management frame header length plus 2 bytes each
+		 * for auth algorithm number, transaction number and
+		 * status code.
+		 */
 
-			frame_len = sizeof(tSirMacMgmtHdr) +
-				   SIR_MAC_AUTH_CHALLENGE_OFFSET;
-			body_len = SIR_MAC_AUTH_CHALLENGE_OFFSET;
-		}
+		frame_len = sizeof(tSirMacMgmtHdr) +
+			   SIR_MAC_AUTH_CHALLENGE_OFFSET;
+		body_len = SIR_MAC_AUTH_CHALLENGE_OFFSET;
 		break;
 
 	case SIR_MAC_AUTH_FRAME_4:
@@ -2128,8 +2132,12 @@ lim_send_auth_mgmt_frame(tpAniSirGlobal mac_ctx,
 		body_len = SIR_MAC_AUTH_CHALLENGE_OFFSET;
 
 		break;
+	default:
+		lim_log(mac_ctx, LOGE, FL("Invalid auth transaction seq num."));
+		return;
 	} /* switch (auth_frame->authTransactionSeqNumber) */
 
+alloc_packet:
 	qdf_status = cds_packet_alloc((uint16_t) frame_len, (void **)&frame,
 				 (void **)&packet);
 
@@ -2160,10 +2168,7 @@ lim_send_auth_mgmt_frame(tpAniSirGlobal mac_ctx,
 		qdf_mem_copy(body, (uint8_t *) auth_frame, body_len);
 
 		lim_log(mac_ctx, LOG1,
-			FL("*** Sending Auth seq# 3 status %d (%d) to"
-				MAC_ADDRESS_STR),
-			auth_frame->authStatusCode,
-			(auth_frame->authStatusCode == eSIR_MAC_SUCCESS_STATUS),
+			FL("Sending Auth seq# 3 to " MAC_ADDRESS_STR),
 			MAC_ADDR_ARRAY(mac_hdr->da));
 
 	} else {