BOT IRC C Windows

/*
 BOT IRC C
 @author Julienl
*/

#include <winsock2.h>
#include <string.h>
#include <stdio.h>
#include <regex.h>
#include <time.h>


//Fonction initialisation
void init()
{
    WSADATA WSAData;

    WSAStartup(MAKEWORD(2, 2), &WSAData);
}

//Fonction cleanup de WSA
int CleanupWSA()
{
    int WSA = WSACleanup();

    return WSA;
}

//Fermeture du socket
void clean(SOCKET mysock)
{
    closesocket(mysock);

    CleanupWSA();
}

//Comparer une string à une expression réguliére
int regexcheck(char *str_request, char *str_regex)
{
    int err;
    regex_t preg;
    //const char *str_regex = ":coucou";

    err = regcomp(&preg, str_regex, REG_NOSUB | REG_EXTENDED);

    if(err == 0)
    {
        int match;

        match = regexec(&preg, str_request, 0, NULL, 0);

        regfree(&preg);

        return match;
    }

}


char* returndate(void)
{
    char valdate[100];

    SYSTEMTIME Time;

    GetLocalTime(&Time);

    sprintf(valdate, "PRIVMSG #botjulienl %02d/%02d/%04d\r\n", Time.wDay, Time.wMonth, Time.wYear);

    return valdate;
}

char* returntime(void)
{
    char valtime[100];

    SYSTEMTIME Time;

    GetLocalTime(&Time);

    sprintf(valtime, "PRIVMSG #botjulienl %02dh:%02dmn:%02ds\r\n", Time.wHour, Time.wMinute, Time.wSecond);

    return valtime;
}


//fonction main
int main(int argc, char **argv)
{
    init();

    char *nick = "NICK jultaro\r\n";
    char *user = "USER guest \"localhost\" \"irc_server\" :julbot \r\n";
    char *join = "JOIN #botjulienl\r\n";
    char *chan = "#botjulienl";

    int i = 0;

    //Definition de la socket
    SOCKET mysock;
    SOCKADDR_IN sin;

    //Défiition des informations de la socket
    sin.sin_addr.s_addr = inet_addr("213.179.58.83");
    sin.sin_family      = AF_INET;
    sin.sin_port        = htons(6667);
    mysock = socket(AF_INET,SOCK_STREAM,0);

    //Connexion de la socket
    if(connect(mysock, (SOCKADDR *)&sin, sizeof(sin)) == -1)
    {
        printf("%u", WSAGetLastError());
        return -1;
    }

    //Transmission des données d'authentification
    if(send(mysock, nick, strlen(nick), 0) == -1)
    {
        printf("Error for Nick \n");
    }

    if(send(mysock, user, strlen(user), 0) == -1)
    {
        printf("Error for User\n");
    }

    if(send(mysock, join, strlen(join), 0) == -1)
    {
        printf("Error for JOIN\n");
    }

    send(mysock, "PRIVMSG #botjulienl Plop\r\n", strlen("PRIVMSG #botjulienl Plop\r\n"), 0);

    while(i == 0)
    {
        char * buffer;
        char buf[512];

        if(recv(mysock, buf, sizeof(buf), 0) == -1)
        {
            printf("Error : buffer");
        }

        buffer = malloc(sizeof(buf));

        buffer = buf;

        //Répondre au Ping
        if (strstr(buffer, "PING :") != NULL && buffer[0] == 'P')
        {
            buffer[1] = 'O';

            if ((send(mysock, buffer, strlen(buffer), 0)) == -1)
            {
                printf("Error : PING");
            }

        }

        if(regexcheck(buffer,"PRIVMSG #botjulienl :!time") == 0 && strstr(buffer, ":julienl!") != NULL)
        {
            char *time = returntime();

            if(send(mysock, time, strlen(time), 0) == -1)
            {
                printf("ERROR : Time");
            }
        }

        if(regexcheck(buffer, "PRIVMSG #botjulienl :!date") == 0 && strstr(buffer, ":julienl!") != NULL)
        {
            char *date = returndate();

            if(send(mysock, date, strlen(date), 0) == -1)
            {
                printf("ERROR : Date");
            }
        }

        if(regexcheck(buffer, "PRIVMSG #botjulienl :test") == 0 && strstr(buffer, ":julienl!") != NULL)
        {
            send(mysock, "PRIVMSG #botjulienl Yeah !\r\n", strlen("PRIVMSG #botjulienl Yeah !\r\n"), 0);
        }

        if(regexcheck(buffer, "PRIVMSG #botjulienl :!quit") == 0 && strstr(buffer, ":julienl!") != NULL)
        {
            send(mysock, "QUIT\r\n", strlen("QUIT\r\n"), 0);

            i = 1;
        }

        printf("%s", buffer);

        //Vider le buffer
        free(buffer);
        buffer = NULL;
    }

    clean(mysock);

    return 0;
}