in_addr_t to string

Question

I have an IP address stored in in_addr_t and I want to create the corresponding string representation of this data type (e.g. in_addr_t to 10.0.0.1).

How can I do that?

score 9 · Accepted Answer · edited Apr 22 '20 at 14:11

9

Use inet_ntop() - convert IPv4 and IPv6 addresses from binary to text form.

edited Apr 22 '20 at 14:11

pevik

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answered Sep 22 '10 at 10:14

James Anderson

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inet_ntop takes const void *restrict src as argument. My type is in_addr_t. How can I convert between the two of them? – cateof Sep 22 '10 at 11:08
2

@cateof: You can simply pass the address of your `in_addr_t` variable as the `src` argument, with `AF_INET` as the `af` argument. – caf Sep 22 '10 at 13:37
More recent documentation [here](http://man7.org/linux/man-pages/man3/inet_ntop.3.html) – HappyCactus Sep 07 '17 at 08:39

score 0 · Answer 2 · answered Feb 08 '20 at 07:15

-(NSString*)long2ip:(uint32_t)ip
{
    char str[40];
    struct in_addr myaddr;
    myaddr.s_addr = htonl(ip);
    if (inet_ntop(AF_INET, &myaddr, str, sizeof(str)))
    {
        return [NSString stringWithFormat:@"%s",str];
    }
    else
    {
        return nil;
    }
}

score -1 · Answer 3 · answered Sep 22 '10 at 10:14

-1

char *inet_ntoa(struct in_addr in);
is the desired function.

answered Sep 22 '10 at 10:14

bhups

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inet_ntoa() seems to be considered deprecated. – unwind Sep 22 '10 at 10:32
2

inet_ntoa takes an in_addr that is not the same as inet_addr_t. Please consider changing your answer. – WeGi Jun 20 '14 at 12:28
`inet_ntoa` is a non-reentrant functions, because it returns static buffer. So better to use `inet_ntop` instead of `inet_ntoa`. – rashok Nov 29 '17 at 09:37

in_addr_t to string

3 Answers3

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