convert ipV4 between uint and string

convert_ipv4_between_uint_and_string.c

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


int ipv4_to_string(uint32_t ipaddr, char *str) {
	memset (str, 0, sizeof(char) * 50);	
	sprintf(str, "%d.%d.%d.%d", (ipaddr >> 24)&0xFF,
			(ipaddr >> 16)&0xFF, (ipaddr >> 8)&0xFF, (ipaddr)&0xFF);

	return 0;
}

uint32_t ipv4_to_uint(char *ipaddr) {
	uint32_t ipV4 = 0;
	uint32_t tmp;
	char *pch;

	pch = strtok (ipaddr,".");
	do {
		tmp = atoi(pch);
		ipV4 = (ipV4 << 8) | tmp;
    	pch = strtok (NULL, ".");
	} while (pch != NULL);

	return ipV4;
}

int main() {
	uint32_t ipV4;
	char ipV4_s[50];
	
	ipV4 = 3764655192ul; // 224.100.20.88
	printf("Origin: ip : 224.100.20.88\n");
	printf("Origin: ip in hex: 0x%X\n\n", ipV4);


	ipv4_to_string(ipV4, ipV4_s);
	printf("ip: %s\n", ipV4_s);

	ipV4 = ipv4_to_uint(ipV4_s);
	printf("ip in hex: 0x%X\n", ipV4);

	return 0;
}