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- /*
- * Copyright (c) 2014, Tuan PM
- * Email: tuanpm@live.com
- *
- * All rights reserved.
- *
- * 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. Neither the name of the copyright holder 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 THE COPYRIGHT HOLDER 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.
- *
- */
- #include <string.h>
- #include <stdio.h>
- #include <ctype.h>
- #include <math.h>
- #include <stddef.h>
- #include "mqtt/utils.h"
- uint8_t ICACHE_FLASH_ATTR UTILS_IsIPV4 (int8_t *str)
- {
- uint8_t segs = 0; /* Segment count. */
- uint8_t chcnt = 0; /* Character count within segment. */
- uint8_t accum = 0; /* Accumulator for segment. */
- /* Catch NULL pointer. */
- if (str == 0)
- return 0;
- /* Process every character in string. */
- while (*str != '\0') {
- /* Segment changeover. */
- if (*str == '.') {
- /* Must have some digits in segment. */
- if (chcnt == 0)
- return 0;
- /* Limit number of segments. */
- if (++segs == 4)
- return 0;
- /* Reset segment values and restart loop. */
- chcnt = accum = 0;
- str++;
- continue;
- }
- /* Check numeric. */
- if ((*str < '0') || (*str > '9'))
- return 0;
- /* Accumulate and check segment. */
- if ((accum = accum * 10 + *str - '0') > 255)
- return 0;
- /* Advance other segment specific stuff and continue loop. */
- chcnt++;
- str++;
- }
- /* Check enough segments and enough characters in last segment. */
- if (segs != 3)
- return 0;
- if (chcnt == 0)
- return 0;
- /* Address okay. */
- return 1;
- }
- uint8_t ICACHE_FLASH_ATTR UTILS_StrToIP(const int8_t* str, void *ip)
- {
- /* The count of the number of bytes processed. */
- int i;
- /* A pointer to the next digit to process. */
- const char * start;
- start = str;
- for (i = 0; i < 4; i++) {
- /* The digit being processed. */
- char c;
- /* The value of this byte. */
- int n = 0;
- while (1) {
- c = * start;
- start++;
- if (c >= '0' && c <= '9') {
- n *= 10;
- n += c - '0';
- }
- /* We insist on stopping at "." if we are still parsing
- the first, second, or third numbers. If we have reached
- the end of the numbers, we will allow any character. */
- else if ((i < 3 && c == '.') || i == 3) {
- break;
- }
- else {
- return 0;
- }
- }
- if (n >= 256) {
- return 0;
- }
- ((uint8_t*)ip)[i] = n;
- }
- return 1;
- }
- uint32_t ICACHE_FLASH_ATTR UTILS_Atoh(const int8_t *s)
- {
- uint32_t value = 0, digit;
- int8_t c;
- while ((c = *s++)) {
- if ('0' <= c && c <= '9')
- digit = c - '0';
- else if ('A' <= c && c <= 'F')
- digit = c - 'A' + 10;
- else if ('a' <= c && c <= 'f')
- digit = c - 'a' + 10;
- else break;
- value = (value << 4) | digit;
- }
- return value;
- }
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