turn 0.17.1

A pure Rust implementation of TURN
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

#[cfg(test)]
mod binding_test;

use std::collections::HashMap;
use std::net::SocketAddr;

use tokio::time::Instant;

//  Channel number:
//    0x4000 through 0x7FFF: These values are the allowed channel
//    numbers (16,383 possible values).
const MIN_CHANNEL_NUMBER: u16 = 0x4000;
const MAX_CHANNEL_NUMBER: u16 = 0x7fff;

#[derive(Copy, Clone, Debug, PartialEq)]
pub(crate) enum BindingState {
    Idle,
    Request,
    Ready,
    Refresh,
    Failed,
}

#[derive(Copy, Clone, Debug, PartialEq)]
pub(crate) struct Binding {
    pub(crate) number: u16,
    pub(crate) st: BindingState,
    pub(crate) addr: SocketAddr,
    pub(crate) refreshed_at: Instant,
}

impl Binding {
    pub(crate) fn set_state(&mut self, state: BindingState) {
        //atomic.StoreInt32((*int32)(&b.st), int32(state))
        self.st = state;
    }

    pub(crate) fn state(&self) -> BindingState {
        //return BindingState(atomic.LoadInt32((*int32)(&b.st)))
        self.st
    }

    pub(crate) fn set_refreshed_at(&mut self, at: Instant) {
        self.refreshed_at = at;
    }

    pub(crate) fn refreshed_at(&self) -> Instant {
        self.refreshed_at
    }
}
/// Thread-safe Binding map.
#[derive(Default)]
pub(crate) struct BindingManager {
    chan_map: HashMap<u16, String>,
    addr_map: HashMap<String, Binding>,
    next: u16,
}

impl BindingManager {
    pub(crate) fn new() -> Self {
        BindingManager {
            chan_map: HashMap::new(),
            addr_map: HashMap::new(),
            next: MIN_CHANNEL_NUMBER,
        }
    }

    pub(crate) fn assign_channel_number(&mut self) -> u16 {
        let n = self.next;
        if self.next == MAX_CHANNEL_NUMBER {
            self.next = MIN_CHANNEL_NUMBER;
        } else {
            self.next += 1;
        }
        n
    }

    pub(crate) fn create(&mut self, addr: SocketAddr) -> Option<&Binding> {
        let b = Binding {
            number: self.assign_channel_number(),
            st: BindingState::Idle,
            addr,
            refreshed_at: Instant::now(),
        };

        self.chan_map.insert(b.number, b.addr.to_string());
        self.addr_map.insert(b.addr.to_string(), b);
        self.addr_map.get(&addr.to_string())
    }

    pub(crate) fn find_by_addr(&self, addr: &SocketAddr) -> Option<&Binding> {
        self.addr_map.get(&addr.to_string())
    }

    pub(crate) fn get_by_addr(&mut self, addr: &SocketAddr) -> Option<&mut Binding> {
        self.addr_map.get_mut(&addr.to_string())
    }

    pub(crate) fn find_by_number(&self, number: u16) -> Option<&Binding> {
        let s = self.chan_map.get(&number)?;
        self.addr_map.get(s)
    }

    pub(crate) fn get_by_number(&mut self, number: u16) -> Option<&mut Binding> {
        let s = self.chan_map.get(&number)?;
        self.addr_map.get_mut(s)
    }

    pub(crate) fn delete_by_addr(&mut self, addr: &SocketAddr) -> bool {
        if let Some(b) = self.addr_map.remove(&addr.to_string()) {
            self.chan_map.remove(&b.number);
            true
        } else {
            false
        }
    }

    pub(crate) fn delete_by_number(&mut self, number: u16) -> bool {
        if let Some(s) = self.chan_map.remove(&number) {
            self.addr_map.remove(&s);
            true
        } else {
            false
        }
    }

    pub(crate) fn size(&self) -> usize {
        self.addr_map.len()
    }
}