Description
Running this code:
use std::io::net::udp::UdpSocket;
use std::io::net::ip::{Ipv4Addr, SocketAddr};
fn main() {
let local_addr = SocketAddr { ip: Ipv4Addr(0, 0, 0, 0), port: 3671 };
let mut socket = match UdpSocket::bind(local_addr) {
Ok(s) => s,
Err(e) => panic!("couldn't bind socket: {}", e),
};
match socket.join_multicast(Ipv4Addr(224, 0, 23, 12)) {
Err(why) => println!("! {}", why),
Ok(_) => {},
};
drop(socket)
}On Windows 7, 32-bit (rustc 0.13.0-nightly (5ba610265 2014-12-25 18:01:36 +0000)), and Windows 7, 64-bit (0.13.0-nightly (5ba610265 2014-12-25 18:01:36 +0000)) yields the error:
OS Error 10042: An unknown, invalid, or unsupported option or level was specified in a getsockopt or setsockopt call
Doing some digging, I found a MS KB article that seems to directly mention this:
If the project is linked with Ws2_32.lib, setsockopt will fail with runtime error 10042 (WSAENOPROTOOPT). This is because in Winsock.h, IP_ADD_MEMBERSHIP is defined as "5". The corresponding Winsock runtime can not resolve option 5 at the IPPROTO_IP level, so the failure occurs with error code 10042.
As far as I can see, the current constant is set to 5, and the article says it should be 12