diff options
Diffstat (limited to 'util/fletcher')
| -rw-r--r-- | util/fletcher/Makefile | 37 | ||||
| -rw-r--r-- | util/fletcher/fletcher.c | 128 |
2 files changed, 0 insertions, 165 deletions
diff --git a/util/fletcher/Makefile b/util/fletcher/Makefile deleted file mode 100644 index 4f3957c632..0000000000 --- a/util/fletcher/Makefile +++ /dev/null @@ -1,37 +0,0 @@ -#***************************************************************************** -# -# Copyright (c) 2014, Sage Electronic Engineering, LLC -# All rights reserved. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# * Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# * 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. -# * Neither the name of Advanced Micro Devices, Inc. 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 COPYRIGHT HOLDERS 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 ADVANCED MICRO DEVICES, INC. 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. -# -#***************************************************************************** -HOSTCC ?= gcc - -fletcher_exe : fletcher.c - $(HOSTCC) fletcher.c -o fletcher - -fletcher : fletcher_exe - -clean: - @rm -f fletcher.o fletcher fletcher.exe diff --git a/util/fletcher/fletcher.c b/util/fletcher/fletcher.c deleted file mode 100644 index a5724943aa..0000000000 --- a/util/fletcher/fletcher.c +++ /dev/null @@ -1,128 +0,0 @@ -/* - * Copyright (c) 1998-2006 The TCPDUMP project - * 2014 Sage Electronic Engineering, LLC - * All Rights Reserved - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that: (1) source code - * distributions retain the above copyright notice and this paragraph - * in its entirety, and (2) distributions including binary code include - * the above copyright notice and this paragraph in its entirety in - * the documentation or other materials provided with the distribution. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND - * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT - * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE. - * - * Original code by Hannes Gredler <hannes@juniper.net> - * Rewritten for Fletcher32 by Bruce Griffith <Bruce.Griffith@se-eng.com> - */ - -#include <errno.h> -#include <stdio.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> -#include <string.h> - -#define MAX_PSP_DIRECTORY_SIZE 512 - -typedef unsigned int uint32_t; -typedef unsigned char uint8_t; -typedef unsigned short uint16_t; - -/* - * Creates the OSI Fletcher checksum. See 8473-1, Appendix C, section C.3. - * The checksum field of the passed PDU does not need to be reset to zero. - * - * The "Fletcher Checksum" was proposed in a paper by John G. Fletcher of - * Lawrence Livermore Labs. The Fletcher Checksum was proposed as an - * alternative to cyclical redundancy checks because it provides error- - * detection properties similar to cyclical redundancy checks but at the - * cost of a simple summation technique. Its characteristics were first - * published in IEEE Transactions on Communications in January 1982. One - * version has been adopted by ISO for use in the class-4 transport layer - * of the network protocol. - * - * This program expects: - * stdin: The input file to compute a checksum for. The input file - * not be longer than 256 bytes. - * stdout: Copied from the input file with the Fletcher's Checksum - * inserted 8 bytes after the beginning of the file. - * stderr: Used to print out error messages. - */ - -uint32_t fletcher32 (const uint16_t *pptr, int length) -{ - - uint32_t c0; - uint32_t c1; - uint32_t checksum; - int index; - - c0 = 0xFFFF; - c1 = 0xFFFF; - - for (index = 0; index < length; index++) { - /* - * Ignore the contents of the checksum field. - */ - c0 += *(pptr++); - c1 += c0; - if ((index % 360) == 0) { - c0 = (c0 & 0xFFFF) + (c0 >> 16); // Sum0 modulo 65535 + the overflow - c1 = (c1 & 0xFFFF) + (c1 >> 16); // Sum1 modulo 65535 + the overflow - } - - } - - c0 = (c0 & 0xFFFF) + (c0 >> 16); // Sum0 modulo 65535 + the overflow - c1 = (c1 & 0xFFFF) + (c1 >> 16); // Sum1 modulo 65535 + the overflow - checksum = (c1 << 16) | c0; - - return checksum; -} - -int main(int argc, char **argv) -{ - uint32_t checksum = 0xFFFFFFFF; - struct stat filestat = {}; - int retcode = EINVAL; - size_t filesize = 0; - char debugoption[] = "--print"; - - uint16_t buffer[MAX_PSP_DIRECTORY_SIZE / sizeof(uint16_t)]; - - retcode = fstat(fileno(stdin), &filestat); - filesize = filestat.st_size; - if (retcode < 0) { - perror("FLETCHER32"); - return errno; - } else if (!((12 < filesize) && (filesize <= sizeof(buffer)))) { - fprintf(stderr, "FLETCHER32: input file is not valid for this program.\n"); - return EINVAL; - } - retcode = read(fileno(stdin), (void *)buffer, filesize); - if (retcode < 0) { - perror("FLETCHER32"); - return errno; - } - - checksum = fletcher32(&buffer[2], filesize/2 - 2); - *((uint32_t *)& buffer[2]) = checksum; -#ifndef DEBUG - if ((argc == 2) && (strcmp(argv[1], debugoption) == 0)) { -#endif - fprintf(stderr, "Fletcher's Checksum: %x\n", checksum); -#ifndef DEBUG - } -#endif - - retcode = write(fileno(stdout), buffer, filesize); - if (retcode < 0) { - perror("FLETCHER32"); - return errno; - } - - return 0; -} |