esp-firewall/ESPFirewall/lib/Firewall/src/esp32Firewall.cpp

#include "esp32Firewall.hpp"

namespace firewall
{
    Firewall::Firewall()
    {
        this->amount_of_rules = retrieve_settings_value("amount_of_rules");
        for (uint8_t i = 1; i <= this->amount_of_rules; i++)
        {
            firewall_rule_t *rule_ptr = retrieve_firewall_rule(i);
            add_rule_to_firewall(rule_ptr);
        }
    }

    Firewall::~Firewall()
    {
    }

    void Firewall::add_rule_to_firewall(firewall_rule_t *rule_ptr)
    {
        store_settings_value("amount_of_rules", this->amount_of_rules);
        store_firewall_rule(rule_ptr);
        firewall_rule_t *temp;
        if (this->head == NULL)
        {
            this->head = rule_ptr;
            rule_ptr->next = NULL;
            return;
        }
        temp = this->head;
        while (temp->next != NULL)
        {
            temp = temp->next;
        }
        temp->next = rule_ptr;
        rule_ptr->next = NULL;
        return;
    }

    firewall_rule_t *Firewall::get_rule_from_firewall(uint8_t key)
    {
        firewall_rule_t *rule_ptr = this->head;
        if (this->head == NULL)
        {
            return NULL;
        }
        while (rule_ptr->key != key)
        {
            if (rule_ptr->next == NULL)
            {
                return NULL;
            }
            else
            {
                rule_ptr = rule_ptr->next;
            }
        }
        return rule_ptr;
    }

    ok_t Firewall::delete_rule_from_firewall(uint8_t key)
    {
        if (this->head == NULL)
            return NO_ACTION;
        firewall_rule_t *current_rule_ptr = this->head;
        firewall_rule_t *previous_rule_ptr = NULL;
        firewall_rule_t *temp = NULL;
        while (current_rule_ptr->key != key)
        {
            if (current_rule_ptr->next == NULL)
                return NO_ACTION;
            else
            {
                previous_rule_ptr = current_rule_ptr;
                current_rule_ptr = current_rule_ptr->next;
            }
        }
        if (current_rule_ptr == this->head)
        {
            this->head = head->next;
            temp = this->head;
        }
        else
        {
            previous_rule_ptr->next = current_rule_ptr->next;
            temp = previous_rule_ptr->next;
        }
        while (temp != NULL)
        {
            temp->key--;
            temp = temp->next;
        }
        free(current_rule_ptr);
        this->amount_of_rules--;
        store_settings_value("amount_of_rules", this->amount_of_rules);
        if (this->amount_of_rules != 0)
            store_all_firewall_rules(head);
        return SUCCESS;
    }
}