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

use std::fmt;

use ffi;

/// Network interface index
///
/// Identifies a single interface by index.
#[derive(Clone,Copy,PartialEq,Eq,PartialOrd,Ord,Hash)]
pub struct InterfaceIndex(u32);

impl InterfaceIndex {
	/// Construct new `InterfaceIndex` from raw index and makes sure
	/// not to use the special reserved values (`0` and `!0`).
	pub fn from_raw(ndx: u32) -> Option<Self> {
		match ndx {
			ffi::INTERFACE_INDEX_ANY => None,
			ffi::INTERFACE_INDEX_LOCAL_ONLY => None,
			ffi::INTERFACE_INDEX_UNICAST => None,
			ffi::INTERFACE_INDEX_P2P => None,
			_ => Some(InterfaceIndex(ndx)),
		}
	}

	/// raw index
	pub fn into_raw(self) -> u32 {
		self.0
	}
}

impl Into<u32> for InterfaceIndex {
	fn into(self) -> u32 {
		self.into_raw()
	}
}

impl fmt::Debug for InterfaceIndex {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		fmt::Debug::fmt(&self.0, f)
	}
}

/// Network interface
///
/// Either identifies a single interface (by index) or the special "Any"
/// or "LocalOnly" interfaces.
#[derive(Clone,Copy,PartialEq,Eq,PartialOrd,Ord,Hash,Debug)]
pub enum Interface {
	/// Any interface; depending on domain name this means either
	/// multicast or unicast
	Any,
	/// Single interface
	Index(InterfaceIndex),
	/// Local machine only
	LocalOnly,
	/// See [`kDNSServiceInterfaceIndexUnicast`](https://developer.apple.com/documentation/dnssd/kdnsserviceinterfaceindexunicast)
	Unicast,
	/// See [`kDNSServiceInterfaceIndexP2P`](https://developer.apple.com/documentation/dnssd/kdnsserviceinterfaceindexp2p)
	PeerToPeer,
}

impl Interface {
	/// Construct from raw value
	pub fn from_raw(raw: u32) -> Self {
		match raw {
			ffi::INTERFACE_INDEX_ANY => Interface::Any,
			ffi::INTERFACE_INDEX_LOCAL_ONLY => Interface::LocalOnly,
			ffi::INTERFACE_INDEX_UNICAST => Interface::Unicast,
			ffi::INTERFACE_INDEX_P2P => Interface::PeerToPeer,
			_ => Interface::Index(InterfaceIndex(raw)),
		}
	}

	/// Convert to raw value
	pub fn into_raw(self) -> u32 {
		match self {
			Interface::Any => ffi::INTERFACE_INDEX_ANY,
			Interface::Index(InterfaceIndex(raw)) => raw,
			Interface::LocalOnly => ffi::INTERFACE_INDEX_LOCAL_ONLY,
			Interface::Unicast => ffi::INTERFACE_INDEX_UNICAST,
			Interface::PeerToPeer => ffi::INTERFACE_INDEX_P2P,
		}
	}
}

impl Into<u32> for Interface {
	fn into(self) -> u32 {
		self.into_raw()
	}
}