mqtt_utils.h File Reference

#include "c_types.h"

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Functions
uint32_t ICACHE_FLASH_ATTR	UTILS_Atoh (const int8_t *s)
uint8_t ICACHE_FLASH_ATTR	UTILS_StrToIP (const int8_t *str, void *ip)
uint8_t ICACHE_FLASH_ATTR	UTILS_IsIPV4 (int8_t *str)

Function Documentation

UTILS_Atoh()

uint32_t ICACHE_FLASH_ATTR UTILS_Atoh

(

const int8_t *

s

)

Definition at line 130 of file mqtt_utils.c.

{
    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;
}

UTILS_IsIPV4()

uint8_t ICACHE_FLASH_ATTR UTILS_IsIPV4

(

int8_t *

str

)

Definition at line 41 of file mqtt_utils.c.

{
    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;
}

UTILS_StrToIP()

uint8_t ICACHE_FLASH_ATTR UTILS_StrToIP	(	const int8_t *	str,
		void *	ip
	)

Definition at line 91 of file mqtt_utils.c.

Referenced by MQTT_Connect(), and wifi_softap_ip_config().

{

        /* 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;

}

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