server-client-network/Banns.c

#include "Banns.h"
#include <stdlib.h>
#include <stdio.h>
#include <time.h>

BannList* bannsNew()
{
    BannList* list = malloc(sizeof(BannList));
    list->root = NULL;
    return list;
}

void bannsRemove(BannList* bl)
{
    Bann* b = bl->root;
    while(b != NULL)
    {
        Bann* next = b->next;
        free(b);
        b = next;
    }
    bl->root = NULL;
    free(bl);
}

void bannsAdd(BannList* bl, int ip)
{
    Bann* b = malloc(sizeof(Bann));
    b->ip = ip;
    time(&b->timeStamp);
    b->timeStamp += 120; // two minutes
    b->next = bl->root;
    bl->root = b;
}

int bannsIsBanned(BannList* bl, int ip)
{
    time_t t;
    time(&t);
    
    Bann* prev = NULL;
    Bann* b = bl->root;
    
    while(b != NULL)
    {
        if(b->ip == ip)
        {
            if(t < b->timeStamp)
            {
                return 1;
            }
            else
            {
                if(prev == NULL)
                {
                    Bann* deleteMe = bl->root;
                    bl->root = bl->root->next;
                    free(deleteMe);
                }
                else
                {
                    prev->next = b->next;
                    free(b);
                }
                return 0;
            }
        }
        
        prev = b;
        b = b->next;
    }
    return 0;
}