xref: /btstack/src/gap.h (revision f471afd8963ca1a5b914db0cbb3471db087f44b8)

/*
 * Copyright (C) 2011-2012 BlueKitchen GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 4. Any redistribution, use, or modification is done solely for
 *    personal benefit and not for any commercial purpose or for
 *    monetary gain.
 *
 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Please inquire about commercial licensing options at [email protected]
 *
 */

#ifndef __GAP_H
#define __GAP_H

#if defined __cplusplus
extern "C" {
#endif

typedef enum {

	// MITM protection not required
	// No encryption required
	// No user interaction required
	LEVEL_0 = 0,

	// MITM protection not required
	// No encryption required
	// Minimal user interaction desired
	LEVEL_1,

	// MITM protection not required
	// Encryption required
	LEVEL_2,

	// MITM protection required
	// Encryption required
	// User interaction acceptable
	LEVEL_3,

	// MITM protection required
	// Encryption required
	// 128-bit equivalent strength for link and encryption keys required (P-192 is not enough)
	// User interaction acceptable
	LEVEL_4,
} gap_security_level_t;

typedef enum {
	GAP_SECURITY_NONE,
	GAP_SECUIRTY_ENCRYPTED,		// SSP: JUST WORKS
	GAP_SECURITY_AUTHENTICATED, // SSP: numeric comparison, passkey, OOB
	// GAP_SECURITY_AUTHORIZED
} gap_security_state;

/**
 * @bbrief enable/disable bonding. default is enabled
 * @praram enabled
 */
void gap_set_bondable_mode(int enabled);

/**
 * @brief start dedicated bonding with device. disconnect after bonding
 * @param device
 * @param request MITM protection
 * @returns error, if max num acl connections active
 * @result GAP_DEDICATED_BONDING_COMPLETE
 */
int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required);

gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type);
gap_security_level_t gap_security_level(hci_con_handle_t con_handle);

void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t level);
int  gap_mitm_protection_required_for_security_level(gap_security_level_t level);

#if defined __cplusplus
}
#endif

#endif // __GAP_H