ZephCore/zephcore/helpers/TransportKeyStore.h

/*
 * SPDX-License-Identifier: Apache-2.0
 * TransportKeyStore - Transport key cache for region filtering
 */

#pragma once

#include <mesh/Packet.h>
#include <helpers/IdentityStore.h>
#include <cstdint>
#include <string.h>

struct TransportKey {
    uint8_t key[16];

    uint16_t calcTransportCode(const mesh::Packet* packet) const;
    bool isNull() const;
};

#define MAX_TKS_ENTRIES   16

class TransportKeyStore {
    uint16_t cache_ids[MAX_TKS_ENTRIES];
    TransportKey cache_keys[MAX_TKS_ENTRIES];
    int num_cache;

    void putCache(uint16_t id, const TransportKey& key);
    void invalidateCache() { num_cache = 0; }

public:
    TransportKeyStore() : num_cache(0) {}

    void getAutoKeyFor(uint16_t id, const char* name, TransportKey& dest);
    int loadKeysFor(uint16_t id, TransportKey keys[], int max_num);
    bool saveKeysFor(uint16_t id, const TransportKey keys[], int num);
    bool removeKeys(uint16_t id);
    bool clear();
};