inet_pton()

inet_pton_example.c

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <arpa/inet.h>


int main(void)
{
    const char IPADDR[] = "192.168.10.5";

    int retval;
    //uint8_t buf[sizeof(struct in_addr)];
    //uint8_t buf[sizeof(struct in6_addr)];
    struct in6_addr addr;

    /*
        ---------------------------------
        typedef uint32_t in_addr_t;

        struct in_addr {
            in_addr_t s_addr;
        };
        ---------------------------------
        struct in6_addr {
            unsigned char   s6_addr[16];
        };
        ---------------------------------
    */

    retval = inet_pton(AF_INET, IPADDR, &addr);
    switch (retval) {
    case 1:
        printf("OK\n    ");
        for (size_t lp = 0; lp < sizeof(struct in_addr); lp++) {
            printf("%02x", addr.s6_addr[lp]);
        }
        printf("\n");
        break;
    case 0:
        printf("not match\n");
        break;
    case -1:
        printf("NG\n");
        break;
    }
    return 0;
}