mwifiex: correct IE parse during association

It is observed that some IEs get missed during association.
This patch correct the old IE parse code. sme->ie will be
store as wpa ie, wps ie, wapi ie and gen ie accordingly.
Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/sta_ioctl.c

@@ -811,7 +811,7 @@ int mwifiex_drv_set_power(struct mwifiex_private *priv, u32 *ps_mode)
  * is checked to determine WPA version. If buffer length is zero, the existing
  * WPA IE is reset.
  */
-static int mwifiex_set_wpa_ie_helper(struct mwifiex_private *priv,
+static int mwifiex_set_wpa_ie(struct mwifiex_private *priv,
 			      u8 *ie_data_ptr, u16 ie_len)
 {
 	if (ie_len) {
@@ -1351,101 +1351,96 @@ static int
 mwifiex_set_gen_ie_helper(struct mwifiex_private *priv, u8 *ie_data_ptr,
 			  u16 ie_len)
 {
-	int ret = 0;
 	struct ieee_types_vendor_header *pvendor_ie;
 	const u8 wpa_oui[] = { 0x00, 0x50, 0xf2, 0x01 };
 	const u8 wps_oui[] = { 0x00, 0x50, 0xf2, 0x04 };
-	u16 unparsed_len = ie_len;
-	int find_wpa_ie = 0;
+	u16 unparsed_len = ie_len, cur_ie_len;
 
 	/* If the passed length is zero, reset the buffer */
 	if (!ie_len) {
 		priv->gen_ie_buf_len = 0;
 		priv->wps.session_enable = false;
-
 		return 0;
-	} else if (!ie_data_ptr) {
+	} else if (!ie_data_ptr ||
+		   ie_len <= sizeof(struct ieee_types_header)) {
 		return -1;
 	}
 	pvendor_ie = (struct ieee_types_vendor_header *) ie_data_ptr;
 
 	while (pvendor_ie) {
+		cur_ie_len = pvendor_ie->len + sizeof(struct ieee_types_header);
+
+		if (pvendor_ie->element_id == WLAN_EID_RSN) {
+			/* IE is a WPA/WPA2 IE so call set_wpa function */
+			mwifiex_set_wpa_ie(priv, (u8 *)pvendor_ie, cur_ie_len);
+			priv->wps.session_enable = false;
+			goto next_ie;
+		}
+
+		if (pvendor_ie->element_id == WLAN_EID_BSS_AC_ACCESS_DELAY) {
+			/* IE is a WAPI IE so call set_wapi function */
+			mwifiex_set_wapi_ie(priv, (u8 *)pvendor_ie,
+					    cur_ie_len);
+			goto next_ie;
+		}
+
 		if (pvendor_ie->element_id == WLAN_EID_VENDOR_SPECIFIC) {
-			/* Test to see if it is a WPA IE, if not, then it is a
-			 * gen IE
+			/* Test to see if it is a WPA IE, if not, then
+			 * it is a gen IE
 			 */
 			if (!memcmp(pvendor_ie->oui, wpa_oui,
 				    sizeof(wpa_oui))) {
-				find_wpa_ie = 1;
-				break;
+				/* IE is a WPA/WPA2 IE so call set_wpa function
+				 */
+				mwifiex_set_wpa_ie(priv, (u8 *)pvendor_ie,
+						   cur_ie_len);
+				priv->wps.session_enable = false;
+				goto next_ie;
 			}
 
-			/* Test to see if it is a WPS IE, if so, enable
-			 * wps session flag
-			 */
 			if (!memcmp(pvendor_ie->oui, wps_oui,
 				    sizeof(wps_oui))) {
+				/* Test to see if it is a WPS IE,
+				 * if so, enable wps session flag
+				 */
 				priv->wps.session_enable = true;
 				mwifiex_dbg(priv->adapter, MSG,
-					    "info: WPS Session Enabled.\n");
-				ret = mwifiex_set_wps_ie(priv,
-							 (u8 *)pvendor_ie,
-							 unparsed_len);
+					    "WPS Session Enabled.\n");
+				mwifiex_set_wps_ie(priv, (u8 *)pvendor_ie,
+						   cur_ie_len);
+				goto next_ie;
 			}
 		}
 
-		if (pvendor_ie->element_id == WLAN_EID_RSN) {
-			find_wpa_ie = 1;
-			break;
-		}
+		/* Saved in gen_ie, such as P2P IE.etc.*/
 
-		if (pvendor_ie->element_id == WLAN_EID_BSS_AC_ACCESS_DELAY) {
-		/* IE is a WAPI IE so call set_wapi function */
-			ret = mwifiex_set_wapi_ie(priv, (u8 *)pvendor_ie,
-						  unparsed_len);
-			return ret;
+		/* Verify that the passed length is not larger than the
+		 * available space remaining in the buffer
+		 */
+		if (cur_ie_len <
+		    (sizeof(priv->gen_ie_buf) - priv->gen_ie_buf_len)) {
+			/* Append the passed data to the end
+			 * of the genIeBuffer
+			 */
+			memcpy(priv->gen_ie_buf + priv->gen_ie_buf_len,
+			       (u8 *)pvendor_ie, cur_ie_len);
+			/* Increment the stored buffer length by the
+			 * size passed
+			 */
+			priv->gen_ie_buf_len += cur_ie_len;
 		}
 
-		unparsed_len -= (pvendor_ie->len +
-				 sizeof(struct ieee_types_header));
+next_ie:
+		unparsed_len -= cur_ie_len;
 
 		if (unparsed_len <= sizeof(struct ieee_types_header))
 			pvendor_ie = NULL;
 		else
 			pvendor_ie = (struct ieee_types_vendor_header *)
-				(((u8 *)pvendor_ie) + pvendor_ie->len +
-				 sizeof(struct ieee_types_header));
-	}
-
-	if (find_wpa_ie) {
-		/* IE is a WPA/WPA2 IE so call set_wpa function */
-		ret = mwifiex_set_wpa_ie_helper(priv, (u8 *)pvendor_ie,
-						unparsed_len);
-		priv->wps.session_enable = false;
-		return ret;
+				(((u8 *)pvendor_ie) + cur_ie_len);
 	}
 
-	/*
-	 * Verify that the passed length is not larger than the
-	 * available space remaining in the buffer
-	 */
-	if (ie_len < (sizeof(priv->gen_ie_buf) - priv->gen_ie_buf_len)) {
-
-		/* Append the passed data to the end of the
-		   genIeBuffer */
-		memcpy(priv->gen_ie_buf + priv->gen_ie_buf_len, ie_data_ptr,
-		       ie_len);
-		/* Increment the stored buffer length by the
-		   size passed */
-		priv->gen_ie_buf_len += ie_len;
-	} else {
-		/* Passed data does not fit in the remaining
-		   buffer space */
-		ret = -1;
-	}
-
-	/* Return 0, or -1 for error case */
-	return ret;
+	return 0;
 }
 
 /*