147 lines
3.1 KiB
C
147 lines
3.1 KiB
C
/*
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* Copyright (c) 2022 Meta
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <errno.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#ifdef CONFIG_ARCH_POSIX
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#include <unistd.h>
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#else
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#include <zephyr/posix/unistd.h>
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#endif
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#include <zephyr/kernel.h>
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#include <zephyr/shell/shell.h>
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#include <zephyr/sys/crc.h>
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static const char *const crc_types[] = {
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[CRC4] = "4",
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[CRC4_TI] = "4_ti",
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[CRC7_BE] = "7_be",
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[CRC8] = "8",
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[CRC8_CCITT] = "8_ccitt",
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[CRC16] = "16",
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[CRC16_ANSI] = "16_ansi",
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[CRC16_CCITT] = "16_ccitt",
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[CRC16_ITU_T] = "16_itu_t",
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[CRC32_C] = "32_c",
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[CRC32_IEEE] = "32_ieee",
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};
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static int string_to_crc_type(const char *s)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(crc_types); ++i) {
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if (strcmp(s, crc_types[i]) == 0) {
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return i;
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}
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}
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return -1;
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}
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static void usage(const struct shell *sh)
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{
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size_t i;
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shell_print(sh, "crc [options..] <address> <size>");
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shell_print(sh, "options:");
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shell_print(sh, "-f This is the first packet");
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shell_print(sh, "-l This is the last packet");
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shell_print(sh, "-p <poly> Use polynomial 'poly'");
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shell_print(sh, "-r Reflect");
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shell_print(sh, "-s <seed> Use 'seed' as the initial value");
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shell_print(sh, "-t <type> Compute the CRC described by 'type'");
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shell_print(sh, "Note: some options are only useful for certain CRCs");
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shell_print(sh, "CRC Types:");
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for (i = 0; i < ARRAY_SIZE(crc_types); ++i) {
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shell_print(sh, "%s", crc_types[i]);
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}
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}
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static int cmd_crc(const struct shell *sh, size_t argc, char **argv)
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{
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int rv;
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size_t size = -1;
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bool last = false;
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uint32_t poly = 0;
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bool first = false;
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uint32_t seed = 0;
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bool reflect = false;
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void *addr = (void *)-1;
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enum crc_type type = CRC32_IEEE;
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optind = 1;
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while ((rv = getopt(argc, argv, "fhlp:rs:t:")) != -1) {
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switch (rv) {
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case 'f':
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first = true;
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break;
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case 'h':
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usage(sh);
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return 0;
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case 'l':
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last = true;
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break;
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case 'p':
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poly = (size_t)strtoul(optarg, NULL, 16);
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if (poly == 0 && errno == EINVAL) {
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shell_error(sh, "invalid seed '%s'", optarg);
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return -EINVAL;
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}
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break;
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case 'r':
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reflect = true;
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break;
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case 's':
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seed = (size_t)strtoul(optarg, NULL, 16);
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if (seed == 0 && errno == EINVAL) {
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shell_error(sh, "invalid seed '%s'", optarg);
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return -EINVAL;
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}
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break;
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case 't':
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type = string_to_crc_type(optarg);
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if (type == -1) {
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shell_error(sh, "invalid type '%s'", optarg);
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return -EINVAL;
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}
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break;
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case '?':
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default:
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usage(sh);
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return -EINVAL;
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}
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}
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if (optind + 2 > argc) {
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shell_error(sh, "'address' and 'size' arguments are mandatory");
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usage(sh);
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return -EINVAL;
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}
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addr = (void *)strtoul(argv[optind], NULL, 16);
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if (addr == 0 && errno == EINVAL) {
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shell_error(sh, "invalid address '%s'", argv[optind]);
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return -EINVAL;
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}
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size = (size_t)strtoul(argv[optind + 1], NULL, 0);
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if (size == 0 && errno == EINVAL) {
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shell_error(sh, "invalid size '%s'", argv[optind + 1]);
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return -EINVAL;
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}
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shell_print(sh, "0x%x", crc_by_type(type, addr, size, seed, poly, reflect, first, last));
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return 0;
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}
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SHELL_CMD_ARG_REGISTER(crc, NULL, NULL, cmd_crc, 0, 12);
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