new.c

#include <kipr/botball.h>

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

/* 
 * File Name          : main.c
 * Last Modified Date : 09/12/2018 (mm/dd/yyyy)
 * Purpose            : Wallaby-to-Wallaby Communication (THIS IS FOR THE HOST**************************88)
 * Author(s)          : Cini (Justin Mok)
 * Notes              : 
 */

struct hostent *host_ent;
struct sockaddr_in server;
struct sockaddr_in dest;
int client;

void initHostWifi()
{
    // I actually don't know what this command does
    system("wpa_cli ter");

    // Kills host daemon
    system("killall hostapd");

    // Supply wpa_supplicant with config
    system("wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant-wlan0.conf");
    
    // Initialize wifi
    system("/usr/bin/python /usr/bin/wifi_configurator.py");
    printf("host wifi initialized\n");
}

void initHost()
{
    int netSocket = socket(AF_INET, SOCK_STREAM, 0);
    struct hostent *serverStruct = gethostbyname("192.168.125.1");

    server.sin_family = AF_INET;
    server.sin_port = htons(8001);
    bcopy((char *)serverStruct->h_addr, (char *)&server.sin_addr.s_addr, serverStruct->h_length); //assigns an ip address to listen on

    bind(netSocket, (struct sockaddr *)&server, sizeof(struct sockaddr));
}
void connectWifi()
{

    /*********************DONT RUN IF NOT THIS BRAIN IS NOT HOST. YOU WILL NEED TO RESTART WALLABY*********************/
    // Initialize wpa_cli
    system("wpa_cli ter"); // initializes wpa_cli

    // Kills WiFi host
    system("killall hostapd");
    system("echo Killed Wifi");

    // Initialize wpa_supplicant config file in order to use wpa_cli
    system("wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant-wlan0.conf"); // init wpa supplicant for wpa_cli
    system("echo initialized wpa_supplicant");

    // Remove existing networks on wpa_cli
    system("wpa_cli remove_network 0"); //

    // Create network, pass network SSID and password, enable network, and save network config
    system("wpa_cli add_network"); // init network creation
    system("wpa_cli set_network 0 ssid \'\"1904-wallaby\"\'");
    system("wpa_cli set_network 0 psk \'\"90bbc900\"\'");
    system("wpa_cli enable_network 0");
    system("wpa_cli save");
    system("echo saved and connected to network");
}

void initSocket()
{

    /********************* THIS IS FOR CLIENT *********************/
    struct hostent *serverStruct;
    int netSocket;
    netSocket = socket(AF_INET, SOCK_STREAM, 0);
    struct sockaddr_in server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(8001);
    // &server_addr.sin_addr.s_addr = "192.168.125.1"; idk why this doesnt work
    serverStruct = gethostbyname("192.168.125.1");
    bcopy((char *)serverStruct->h_addr, (char *)&server_addr.sin_addr.s_addr, serverStruct->h_length); // copy string bytes from h_addr to s_addr

    if (connect(netSocket, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) < 0)
    {
        printf("Connection failed.\n");
    }
}

void listenSocket()
{
    /*********************THIS IS FOR HOST*********************/
    listen(netSocket, 5);
    if ((client_fd = accept(socket_fd, (struct sockaddr *)&dest, &size)) == -1) {
        printf("connection accept fail");
    }
    
    //start data listening thread
    thread_start(listenerThread);

}
int main()
{
    printf("Hello World!\n");

    connectWifi();

    printf("Goodbye World!\n");
    return 0;
}