/*
 * sender.c
 */

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdint.h>

#include "util.h"
#include "cs431vde.h"

int
main(int argc, char *argv[])
{
    int fds[2];

    uint8_t frame[1600];
    ssize_t frame_len;

    int connect_to_remote_switch = 0;
    char *local_vde_cmd[] = { "vde_plug", NULL };
    char *remote_vde_cmd[] = { "ssh", "pjohnson@weathertop.cs.middlebury.edu",
                                      "/home/pjohnson/cs431/bin/vde_plug",
                                      NULL };
    char **vde_cmd = connect_to_remote_switch ? remote_vde_cmd : local_vde_cmd;

    if(connect_to_vde_switch(fds, vde_cmd) < 0) {
        printf("Could not connect to switch, exiting.\n");
        exit(1);
    }

    memset(frame, '\xff', 64);
    frame_len = 64;

    printf("sending frame, length %ld\n", frame_len);
    send_ethernet_frame(fds[1], frame, frame_len);

    /* If the program exits immediately after sending its frames, there is a
     * possibility the frames won't actually be delivered.  If, for example,
     * the "remote_vde_cmd" above is used, the user might not even finish
     * typing their password (which is accepted by a child process) before
     * this process terminates, which would result in send frames not actually
     * arriving.  Therefore, we pause and let the user manually end this
     * process. */

    printf("Press Control-C to terminate sender.\n");
    pause();

    return 0;
}