parse ip to mac

int parse_ip_to_mac(char *pIP, uint8_t *pMac, int macSize)
{
    char *input = pIP;
    char *tmp = pIP;
    int i = 0;
    char val[MAX_SUB_IP_VAL_SZIE] = "";
    uint8_t output[6] = {0};

    if((NULL == pIP) || (NULL == pMac) || (6 != macSize))
    {
        printf("[%s +%d %s] (NULL == pIP) || (NULL == pMac) || (6 != macSize) failed\n", __FILE__, __LINE__, __func__);
        return -1;
    }
    #if 0
    printf("[%s +%d %s] pIP=%s\n", __FILE__, __LINE__, __func__, pIP);
    printf("pMac :");
	for (i = 0; i < macSize; i++)
	{
		printf("0x%x(%d) ", pMac[i], pMac[i]);
	}
    printf("\n");
    #endif
    i = 0;
    while(NULL != input)
    {
        tmp = strchr(input, '.');
        if(NULL == tmp)
        {
            memset(val, '\0', MAX_SUB_IP_VAL_SZIE);
            strcpy(val, input);
            *(output+i) = atoi(val);
            //printf("[%s +%d %s] input=%s val=%s tmp=%s *(output+i)=%d\n", __FILE__, __LINE__, __func__, input, val, tmp, *(output+i));
            break;
        }
        //printf("[%s +%d %s] input=%s tmp=%s\n", __FILE__, __LINE__, __func__, input, tmp);
        //printf("[%s +%d %s] tmp - input=%ld\n", __FILE__, __LINE__, __func__, tmp - input);
        
        memset(val, '\0', MAX_SUB_IP_VAL_SZIE);
        memcpy(val, input, tmp - input);
        //printf("[%s +%d %s] input=%s val=%s tmp=%s\n", __FILE__, __LINE__, __func__, input, val, tmp);
        *(output+i) = atoi(val);
        //printf("[%s +%d %s] input=%s val=%s tmp=%s atoi(val)=%d *(output+i)=%d\n", __FILE__, __LINE__, __func__, input, val, tmp, atoi(val), *(output+i));
        i++;
        input = tmp + 1;
    }
	for (i = 0; i < 2; i++)
	{
		*(pMac+i+4) = *(output+i + 2);
	}
    #if 0
    printf("pMac :");
	for (i = 0; i < macSize; i++)
	{
		printf("0x%x(%d) ", pMac[i], pMac[i]);
	}
    printf("\n");
    #endif
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "multicast_ip_to_mac.h"

int main(int argc, char *argv[])
{
    char desip[MAX_FILENAME_SIZE] = "224.1.8.17";

    unsigned char desmac[6] = {0x01, 0x00, 0x5e, 1, 4, 16};//目的mac <--------------- 

    printf("[%s +%d %s] get_str_version()=%s get_number_version()=%d\n", __FILE__, __LINE__, __func__, get_str_version(), get_number_version());
    printf("[%s +%d %s] desip=%s\n", __FILE__, __LINE__, __func__, desip);
    printf("desmac :");
	for (int i = 0; i < 6; i++)
	{
		printf("0x%x(%d) ", desmac[i], desmac[i]);
	}
    printf("\n");

    parse_ip_to_mac(desip, desmac, 6);

    printf("desmac :");
	for (int i = 0; i < 6; i++)
	{
		printf("0x%x(%d) ", desmac[i], desmac[i]);
	}
    printf("\n");


    return 0;
}

./multicast_ip_to_mac.elf 
[main.cpp +13 main] get_str_version()=number str version 0.0.1.0 get_number_version()=10
[main.cpp +14 main] desip=224.1.8.17
desmac :0x1(1) 0x0(0) 0x5e(94) 0x1(1) 0x4(4) 0x10(16) 
desmac :0x1(1) 0x0(0) 0x5e(94) 0x1(1) 0x8(8) 0x11(17)