ether 0.1.4

Library for parsing and manipulating network data, packet captures.
Documentation 
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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155


pub mod loopback {
    use std::ops;
    use utility::parser;

    pub struct Packet<'a>(&'a [u8]);

    #[doc(hidden)]
    impl<'a> ops::Deref for Packet<'a> {
        type Target = &'a [u8];
        fn deref(&self) -> &Self::Target {
            &self.0
        }
    }

    impl<'a> Packet<'a> {
        pub fn new(data: &'a [u8]) -> Self {
            Packet(data)
        }

        pub fn link(&self) -> Link {
            let link = &self[..4];
            match parser::le_u32(link) {
                2 => Link::IPv4,
                24 | 28 | 30 => Link::IPv6,

                7 => Link::OSI,
                23 => Link::IPX,

                link => panic!("Unsupported link {}", link),
            }
        }

        pub fn payload(&self) -> &[u8] {
            &self[4..]
        }
    }

    #[derive(Debug)]
    pub enum Link {
        IPv4,
        IPv6,
        OSI,
        IPX,
    }
}

pub mod ethernet {
    use std::ops;
    use std::fmt;
    use utility::parser;

    pub struct Frame<'a>(&'a [u8]);

    #[doc(hidden)]
    impl<'a> ops::Deref for Frame<'a> {
        type Target = &'a [u8];
        fn deref(&self) -> &Self::Target {
            &self.0
        }
    }

    impl<'a> Frame<'a> {
        pub fn new(data: &'a [u8]) -> Self {
            Frame(data)
        }

        pub fn destination(&self) -> &[u8] {
            &self[..6]
        }

        pub fn source(&self) -> &[u8] {
            &self[6..12]
        }

        pub fn ethertype(&self) -> EtherType {
            parser::be_u16(&self[12..]).into()
        }

        pub fn payload(&self) -> &[u8] {
            &self[14..]
        }
    }

    impl<'a> fmt::Debug for Frame<'a> {
        fn fmt(&self, fmtr: &mut fmt::Formatter) -> fmt::Result {
            fmtr.debug_struct("ethernet::Frame")
                .field("destination", &self.destination())
                .field("source", &self.source())
                .field("ethertype", &self.ethertype())
                .field("payload", &self.payload())
                .finish()
        }
    }

    #[derive(Debug, PartialEq, Clone)]
    pub enum EtherType {
        IPv4,
        ARP,
        VLAN,
        IPv6,
        Unknown(u16),
    }

    impl From<u16> for EtherType {
        fn from(value: u16) -> Self {
            use self::EtherType::*;
            match value {
                0x0800 => IPv4,
                0x0806 => ARP,
                0x8100 => VLAN, // VLAN-tagged frame (IEEE 802.1Q)
                0x86DD => IPv6,
                e => Unknown(e),
            }
        }
    }

    pub mod vlan {
        use std::ops;
        use std::fmt;
        use utility::parser;

        pub struct Frame<'a>(&'a [u8]);

        #[doc(hidden)]
        impl<'a> ops::Deref for Frame<'a> {
            type Target = &'a [u8];
            fn deref(&self) -> &Self::Target {
                &self.0
            }
        }

        impl<'a> Frame<'a> {
            pub fn new(data: &'a [u8]) -> Self {
                Frame(data)
            }

            pub fn ethertype(&self) -> super::EtherType {
                parser::be_u16(&self[2..]).into()
            }

            pub fn payload(&self) -> &[u8] {
                &self[4..]
            }
        }

        impl<'a> fmt::Debug for Frame<'a> {
            fn fmt(&self, fmtr: &mut fmt::Formatter) -> fmt::Result {
                fmtr.debug_struct("vlan::Frame")
                    .field("ethertype", &self.ethertype())
                    .finish()
            }
        }
    }
}