UCARP is covered by the following license :

/*
 * Copyright (c) 2004-2009 Frank Denis <j at ucarp.org> with the help of all
 * contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */


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  Some code has been imported from the Pure-FTPd project.


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  The bsd-getopt_long.c and bsd-getopt_long.h source code is based upon the
OpenBSD and NetBSD projects and it is covered by the BSD license.
  The carp.c and ip_carp.h files are derived from OpenBSD source code.
  The original license is enclosed at the beginning of the related files.