Hacking [Help] Working on a C application, need advice.

[WhoAmI?]

So, I've been using a program called "FBI" for a while, which lets a user install .CIA files on to the 3DS. There's an option within the application which enables you to recieve a .CIA through WiFi via a sock connection.

The dev of the homebrew is using a Java program to send the files. I want a C version so I can port it easily to other devices. I mainly want it so I can run it on Android (compile C as Linux binary, place it in /system/xbin).

I looked at some code on other websites but non of which seems to work. Here is the code I'm currently working on:

// For both
#include <sys/socket.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 5000
#define BUF_SIZE 16384
 
int main(int argc, char** argv)
{
    if (argc == 3)
    {
        const char* filename = argv[1];
        const char* consoleip = argv[2];
        FILE *fp = fopen(filename, "ab");
        if(NULL == fp)
        {
            printf("Error opening file");
            return 1;
        }
 
        /* Create a socket first */
        int sockfd = 0;
        if((sockfd = socket(AF_INET, SOCK_STREAM, 0))< 0)
        {
            printf("\n Error : Could not create socket \n");
            return 1;
        }
        /* Initialize sockaddr_in data structure */
        struct sockaddr_in serv_addr;
        serv_addr.sin_family = AF_INET;
        serv_addr.sin_port = htons(PORT); // port
        serv_addr.sin_addr.s_addr = inet_addr(consoleip);
 
        /* Attempt a connection */
        if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr))<0)
        {
            printf("\nError : Connect Failed\n");
            return 1;
        }
        /* Receive data in chunks of BUF_SIZE bytes */
        int bytesReceived = 0;
        char buff[BUF_SIZE];
        memset(buff, '0', sizeof(buff));
        while((bytesReceived = read(sockfd, buff, BUF_SIZE)) > 0)
        {
            printf("Bytes received %d\n",bytesReceived);
            fwrite(buff, 1,bytesReceived,fp);
        }
        if(bytesReceived < 0)
        {
            printf("\nRead Error\n");
        }
        return 0;
    }
    else
    {
        printf("Usage:\n\n%s [FILENAME] [3DS IP]\n",argv[0]);
    }
    return 1; // Something went wrong
}

I'm new to C so I have no idea what to do. FBI freezes on "Reading info".

This is the homebrew: http://gbatemp.net/t...staller.386433/

Any help is deeply appreciated. Thanks!