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      1 /*
      2  * Operating Channel Validation (OCV)
      3  * Copyright (c) 2018, Mathy Vanhoef
      4  *
      5  * This software may be distributed under the terms of the BSD license.
      6  * See README for more details.
      7  */
      8 
      9 #ifndef OCV_H
     10 #define OCV_H
     11 
     12 struct wpa_channel_info;
     13 
     14 struct oci_info {
     15 	/* Values in the OCI element */
     16 	u8 op_class;
     17 	u8 channel;
     18 	u8 seg1_idx;
     19 
     20 	/* Derived values for easier verification */
     21 	int freq;
     22 	int sec_channel;
     23 	int chanwidth;
     24 };
     25 
     26 #define OCV_OCI_LEN		3
     27 #define OCV_OCI_EXTENDED_LEN	(3 + OCV_OCI_LEN)
     28 #define OCV_OCI_KDE_LEN		(2 + RSN_SELECTOR_LEN + OCV_OCI_LEN)
     29 
     30 enum oci_verify_result {
     31 	OCI_SUCCESS, OCI_NOT_FOUND, OCI_INVALID_LENGTH, OCI_PARSE_ERROR,
     32 	OCI_PRIMARY_FREQ_MISMATCH, OCI_CHANNEL_WIDTH_MISMATCH,
     33 	OCI_SECONDARY_FREQ_MISMATCH, OCI_SEG_1_INDEX_MISMATCH
     34 };
     35 
     36 extern char ocv_errorstr[256];
     37 
     38 int ocv_derive_all_parameters(struct oci_info *oci);
     39 int ocv_insert_oci(struct wpa_channel_info *ci, u8 **argpos);
     40 int ocv_insert_oci_kde(struct wpa_channel_info *ci, u8 **argpos);
     41 int ocv_insert_extended_oci(struct wpa_channel_info *ci, u8 *pos);
     42 enum oci_verify_result
     43 ocv_verify_tx_params(const u8 *oci_ie, size_t oci_ie_len,
     44 		     struct wpa_channel_info *ci, int tx_chanwidth,
     45 		     int tx_seg1_idx);
     46 
     47 #endif /* OCV_H */
     48