fido2_transport.h

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/*
 * Copyright (c) 2026 Siratul Islam <email@sirat.me>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_AUTHENTICATION_FIDO2_FIDO2_TRANSPORT_H_
#define ZEPHYR_INCLUDE_AUTHENTICATION_FIDO2_FIDO2_TRANSPORT_H_
 
#include <zephyr/kernel.h>
#include <zephyr/sys/iterable_sections.h>
#include <zephyr/authentication/fido2/fido2_types.h>
#include <stddef.h>
#include <stdint.h>

 
#ifdef __cplusplus
extern "C" {
#endif
 
struct fido2_transport;

enum fido2_wire_status {
        FIDO2_WIRE_STATUS_UP_NEEDED,
        FIDO2_WIRE_STATUS_PROCESSING,
        FIDO2_WIRE_STATUS_DONE
};

typedef void (*fido2_transport_recv_cb_t)(const struct fido2_transport *transport, uint32_t cid,
                                          const uint8_t *buf, size_t len);

typedef void (*fido2_transport_cancel_cb_t)(void);

struct fido2_transport_api {
        int (*init)(fido2_transport_recv_cb_t cb, fido2_transport_cancel_cb_t cancel_cb);

        int (*send)(uint32_t cid, const uint8_t *data, size_t len);

        void (*notify)(uint32_t cid, enum fido2_wire_status status);

        void (*shutdown)(void);
};

struct fido2_transport {
        const char *name;
        const struct fido2_transport_api *api;
};

#define FIDO2_TRANSPORT_DEFINE(_name, _label, _api)                                                \
        STRUCT_SECTION_ITERABLE(fido2_transport, _name) = {                                        \
                .name = _label,                                                                    \
                .api = _api,                                                                       \
        }


int fido2_transport_init_all(fido2_transport_recv_cb_t cb, fido2_transport_cancel_cb_t cancel_cb);

void fido2_transport_shutdown_all(void);

 
#ifdef __cplusplus
}
#endif

 
#endif /* ZEPHYR_INCLUDE_AUTHENTICATION_FIDO2_FIDO2_TRANSPORT_H_ */