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On 07/21/2014 10:57 AM, Iñaki Baz Castillo wrote:
> Hi, I'm making a simple code to check whether a user provided IP
> is bindable in any UDP port (so port 0), so basically I run this
> code (some error checking is missing yet):
>
>
> ---------------------------------------------- void checkIP(char*
> ip, int family) {
>
> uv_loop_t loop; uv_udp_t udp_socket; struct sockaddr_storage
> bind_addr; int err = 0;
>
> uv_loop_init(&loop); uv_udp_init(&loop, &udp_socket);
>
> switch(family) { case AF_INET: uv_ip4_addr(ip, 0, (struct
> sockaddr_in*)&bind_addr); break; case AF_INET6: uv_ip6_addr(ip, 0,
> (struct sockaddr_in6*)&bind_addr); break; }
>
> err = uv_udp_bind(&udp_socket, (const struct sockaddr*)&bind_addr,
> 0); uv_close((uv_handle_t*)&udp_socket, (uv_close_cb)on_close);
> uv_loop_close(&loop);
>
> if (err) lalala("uv_udp_bind() failed: %s", uv_strerror(err)); }
>
> }
>
> -----------------------------------------------
>
>
> Note that I don't even call uv_run(). Is it guaranteed that
> uv_udp_bind() would return error in case of giving it an address
> in which the host cannot bind?
>
> Thanks a lot.
>
>
Yes, bind happens immediately, it's not blocking.
- --
Saúl Ibarra Corretgé
bettercallsaghul.com
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