esp-firewall/src/Storage.cpp

#include "Storage.hpp"

namespace fw
{
    Storage::Storage()
    {
#ifdef ESP8266
        this->max_rules = 15;
        this->eeprom_amount_of_rules = 0;
        this->eeprom_rules_head = 1;
        this->eeprom_size = this->max_rules * sizeof(firewall_rule_t) + eeprom_rules_head;
        EEPROM.begin(this->eeprom_size);
#endif
    }

    Storage::~Storage()
    {
    }

#ifdef ESP8266
    uint16_t Storage::eeprom_rule_position(uint8_t key)
    {
        return eeprom_rules_head + (key - 1) * sizeof(firewall_rule_t);
    }
#endif

    uint8_t Storage::retrieve_amount_of_rules()
    {
#ifdef ESP8266
        uint8_t amount_of_rules = EEPROM.read(this->eeprom_amount_of_rules);

        if (amount_of_rules > this->max_rules)
            return 0;
#else
        this->memory.begin("settings", true);
        const uint8_t amount_of_rules = memory.getUChar("amount_of_rules", 0);
        this->memory.end();
#endif
        return amount_of_rules;
    }

    void Storage::store_amount_of_rules(const uint8_t new_amount)
    {
#ifdef ESP8266
        EEPROM.put(this->eeprom_amount_of_rules, new_amount);
        EEPROM.commit();
#else
        this->memory.begin("settings", false);
        this->memory.putUChar("amount_of_rules", new_amount);
        this->memory.end();
#endif
    }

    firewall_rule_t *Storage::retrieve_firewall_rule(const uint8_t key)
    {
        firewall_rule_t *rule_ptr = (firewall_rule_t *)malloc(sizeof(firewall_rule_t));
        rule_ptr->key = key;
#ifdef ESP8266
        uint16_t eeprom_position = eeprom_rule_position(key);

        EEPROM.get(eeprom_position, rule_ptr->ip);
        EEPROM.get(eeprom_position += sizeof(rule_ptr->ip), rule_ptr->port_from);
        EEPROM.get(eeprom_position += sizeof(rule_ptr->port_from), rule_ptr->port_to);
        EEPROM.get(eeprom_position += sizeof(rule_ptr->port_to), rule_ptr->protocol);
        EEPROM.get(eeprom_position += sizeof(rule_ptr->protocol), rule_ptr->target);
#else
        char rulename[10]; // fwRule99\n
        sprintf(rulename, "fwRule%i", key);

        this->memory.begin(rulename, true);
        strncpy(rule_ptr->ip, this->memory.getString(firewall_fields[IP], "0.0.0.0").c_str(), sizeof(rule_ptr->ip));
        rule_ptr->port_from = this->memory.getUShort(firewall_fields[PORT_FROM], 0);
        rule_ptr->port_to = this->memory.getUShort(firewall_fields[PORT_TO], 0);
        rule_ptr->protocol = static_cast<firewall_protocol_t>(this->memory.getUChar(firewall_fields[PROTOCOL], PROTOCOL_ALL));
        rule_ptr->target = static_cast<firewall_target_t>(this->memory.getUChar(firewall_fields[TARGET], TARGET_ACCEPT));
        this->memory.end();
#endif
        return rule_ptr;
    }

    void Storage::store_all_firewall_rules(firewall_rule_t *rule_head)
    {
        firewall_rule_t *temp = rule_head;
        while (temp != NULL)
        {
            store_firewall_rule(temp);
            temp = temp->next;
        }
    }

    void Storage::store_firewall_rule(firewall_rule_t *rule_ptr)
    {
#ifdef ESP8266
        uint16_t eeprom_position = eeprom_rule_position(rule_ptr->key);

        EEPROM.put(eeprom_position, rule_ptr->ip);
        EEPROM.put(eeprom_position += sizeof(rule_ptr->ip), rule_ptr->port_from);
        EEPROM.put(eeprom_position += sizeof(rule_ptr->port_from), rule_ptr->port_to);
        EEPROM.put(eeprom_position += sizeof(rule_ptr->port_to), rule_ptr->protocol);
        EEPROM.put(eeprom_position += sizeof(rule_ptr->protocol), rule_ptr->target);

        EEPROM.commit();
#else
        char rulename[10]; // fwRule99\n
        sprintf(rulename, "fwRule%i", rule_ptr->key);

        this->memory.begin(rulename, false);
        this->memory.putString(firewall_fields[IP], rule_ptr->ip);
        this->memory.putUShort(firewall_fields[PORT_FROM], rule_ptr->port_from);
        this->memory.putUShort(firewall_fields[PORT_TO], rule_ptr->port_to);
        this->memory.putUChar(firewall_fields[PROTOCOL], rule_ptr->protocol);
        this->memory.putUChar(firewall_fields[TARGET], rule_ptr->target);

        this->memory.end();
#endif
    }
}