1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91

use std::net::{SocketAddr, IpAddr};

use error::SSDPResult;
use message::{self, Config};
use receiver::{SSDPReceiver, FromRawSSDP};
use net;


pub trait Listen {
    type Message: FromRawSSDP + Send + 'static;

    /// Listen for messages on all local network interfaces.
    ///
    /// This will call `listen_with_config()` with _default_ values.
    fn listen() -> SSDPResult<SSDPReceiver<Self::Message>> {
        Self::listen_with_config(&Default::default())
    }

    /// Listen for messages on all local network interfaces.
    ///
    /// # Notes
    /// This will _bind_ to each interface, **NOT** to `INADDR_ANY`.
    ///
    /// If you are on an environment where the network interface will be changing,
    /// you will have to stop listening and start listening again,
    /// or we recommend using `listen_anyaddr_with_config()` instead.
    fn listen_with_config(config: &Config) -> SSDPResult<SSDPReceiver<Self::Message>> {
        let mut ipv4_sock = None;
        let mut ipv6_sock = None;

        // Generate a list of reused sockets on the standard multicast address.
        let addrs: Vec<SocketAddr> = try!(message::map_local(|&addr| Ok(Some(addr))));

        for addr in addrs {
            match addr {
                SocketAddr::V4(_) => {
                    let mcast_ip = config.ipv4_addr.parse().unwrap();

                    if ipv4_sock.is_none() {
                        ipv4_sock = Some(try!(net::bind_reuse(("0.0.0.0", config.port))));
                    }

                    let ref sock = ipv4_sock.as_ref().unwrap();

                    debug!("Joining ipv4 multicast {} at iface: {}", mcast_ip, addr);
                    try!(net::join_multicast(&sock, &addr, &mcast_ip));
                }
                SocketAddr::V6(_) => {
                    let mcast_ip = config.ipv6_addr.parse().unwrap();

                    if ipv6_sock.is_none() {
                        ipv6_sock = Some(try!(net::bind_reuse(("::", config.port))));
                    }

                    let ref sock = ipv6_sock.as_ref().unwrap();

                    debug!("Joining ipv6 multicast {} at iface: {}", mcast_ip, addr);
                    try!(net::join_multicast(&sock, &addr, &IpAddr::V6(mcast_ip)));
                }
            }
        }

        let sockets = vec![ipv4_sock, ipv6_sock]
            .into_iter()
            .flat_map(|opt_interface| opt_interface)
            .collect();

        Ok(try!(SSDPReceiver::new(sockets, None)))
    }

    /// Listen on any interface
    ///
    /// # Important
    ///
    /// This version of the `listen`()` will _bind_ to `INADDR_ANY` instead of binding to each interface
    #[cfg(linux)]
    fn listen_anyaddr_with_config(config: &Config) -> SSDPResult<SSDPReceiver<Self::Message>> {
        // Ipv4
        let mcast_ip = config.ipv4_address.parse().unwrap();
        let ipv4_sock = try!(net::bind_reuse(("0.0.0.0", config.port)));
        try!(ipv4_sock.join_multicast_v4(&mcast_ip, &"0.0.0.0".parse().unwrap()));

        // Ipv6
        let mcast_ip = config.ipv6_address.parse().unwrap();
        let ipv6_sock = try!(net::bind_reuse(("::", config.port)));
        try!(ipv6_sock.join_multicast_v6(&mcast_ip, 0));

        let sockets = vec![ipv4_sock, ipv6_sock];
        Ok(try!(SSDPReceiver::new(sockets, None)))
    }
}