hexadecimal value of ip into standard format

开发者_开发知识库is there any function in linux to display the value 7d162f7d in the format 125.22.47.125 ie convert the hexadecimal ip address in its standard ip format

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You could use something like:

#include <stdio.h>
static char *ipToStr (unsigned int ip, char *buffer) {
    sprintf (buffer, "%d.%d.%d.%d", ip >> 24, (ip >> 16) & 0xff,
        (ip >> 8) & 0xff, ip & 0xff);
    return buffer;
}
int main (void) {
    char buff[16];
    printf ("%s\n", ipToStr (0x7d162f7dU, buff));
    return 0;
}

which produces:

125.22.47.125

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The correct function to use for this purpose is

inet_ntop - convert IPv4 and IPv6 addresses from binary to text form

In your case as you seem to be refering to an IPv4 address you have to create a struct in_addr something like that

 struct in_addr addr = { .s_addr = YOURVALUE };

and then you have to call it like that

char addrstr[16] = { 0 };

inet_ntop(AF_INET, &addr, addrstr, sizeof(struct in_addr));