资源简介
4.4BSD-Lite2/TCP_IP详解使用的是其中的栈
代码片段和文件信息
/*-
* Copyright (c) 1991 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Matt Bishop of Dartmouth College.
*
* The United States Government has rights in this work pursuant
* to contract no. NAG 2-680 between the National Aeronautics and
* Space Administration and Dartmouth College.
*
* Redistribution and use in source and binary forms with or without
* modification are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ‘‘AS IS‘‘ AND
* ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL EXEMPLARY OR CONSEQUENTIAL
* DAMAGES (INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE DATA OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT STRICT
* LIABILITY OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
“@(#) Copyright (c) 1991 1993\n\
The Regents of the University of California. All rights reserved.\n“;
#endif /* not lint */
#ifndef lint
static char sccsid[] = “@(#)bdes.c 8.1 (Berkeley) 6/6/93“;
#endif /* not lint */
/*
* BDES -- DES encryption package for Berkeley Software Distribution 4.4
* options:
* -a key is in ASCII
* -b use ECB (electronic code book) mode
* -d invert (decrypt) input
* -f b use b-bit CFB (cipher feedback) mode
* -F b use b-bit CFB (cipher feedback) alternative mode
* -k key use key as the cryptographic key
* -m b generate a MAC of length b
* -o b use b-bit OFB (output feedback) mode
* -p don‘t reset the parity bit
* -v v use v as the initialization vector (ignored for ECB)
* note: the last character of the last block is the integer indicating
* how many characters of that block are to be
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