#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

void usage(char *name)
{
    fprintf(stderr, "usage: %s -i ethdevice\n", name);
}

int main(int argc, char **argv)
{
    /* misc */
    int c;                      
    char *device = NULL;

    printf("IGMP packet generator\n\n");

    printf("Parsing command line...\n");
    while((c = getopt(argc, argv, "i:")) != EOF)
    {
        switch (c)
        {
            case 'i':
                printf("  Net interface = [%s]\n", optarg);
                device = optarg;
                break;

            default:
                usage(argv[0]);
                exit(1);
        }
    }
    if (!device)
    {
        usage(argv[0]);
        exit(EXIT_FAILURE);
    }
    printf("done\n");

    return 0;
}