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
use std::marker::PhantomData;
use ::iana::{OptionCode, Rtype};
use super::{Composer, ComposeResult, ParsedRecordData, Parser, ParseResult,
RecordData};
pub mod rfc5001;
pub mod rfc6975;
pub mod rfc7314;
pub mod rfc7828;
pub mod rfc7830;
pub mod rfc7871;
pub mod rfc7873;
pub mod rfc7901;
pub mod rfc8145;
#[derive(Clone, Debug)]
pub struct Opt<'a>(Parser<'a>);
impl<'a> Opt<'a> {
pub fn iter<O: ParsedOptData<'a>>(&self) -> OptIter<'a, O> {
OptIter::new(self.0.clone())
}
}
impl<'a> RecordData for Opt<'a> {
fn rtype(&self) -> Rtype {
Rtype::Opt
}
fn compose<C: AsMut<Composer>>(&self, mut target: C) -> ComposeResult<()> {
target.as_mut().compose_bytes(self.0.bytes())
}
}
impl<'a> ParsedRecordData<'a> for Opt<'a> {
fn parse(rtype: Rtype, parser: &mut Parser<'a>)
-> ParseResult<Option<Self>> {
if rtype == Rtype::Opt {
Ok(Some(Opt(parser.clone())))
}
else {
Ok(None)
}
}
}
#[derive(Clone, Debug)]
pub struct OptIter<'a, O: ParsedOptData<'a>> {
parser: Parser<'a>,
marker: PhantomData<O>
}
impl<'a, O: ParsedOptData<'a>> OptIter<'a, O> {
fn new(parser: Parser<'a>) -> Self {
OptIter { parser, marker: PhantomData }
}
}
impl<'a, O: ParsedOptData<'a>> Iterator for OptIter<'a, O> {
type Item = ParseResult<O>;
fn next(&mut self) -> Option<Self::Item> {
while self.parser.remaining() > 0 {
match self.next_step() {
Ok(Some(res)) => return Some(Ok(res)),
Ok(None) => { }
Err(err) => return Some(Err(err)),
}
}
None
}
}
impl<'a, O: ParsedOptData<'a>> OptIter<'a, O> {
fn next_step(&mut self) -> ParseResult<Option<O>> {
let code = self.parser.parse_u16()?.into();
let len = self.parser.parse_u16()? as usize;
self.parser.set_limit(len)?;
O::parse(code, &mut self.parser)
}
}
pub trait OptData: Sized {
fn compose<C: AsMut<Composer>>(&self, target: C) -> ComposeResult<()>;
}
pub trait ParsedOptData<'a>: OptData {
fn parse(code: OptionCode, parser: &mut Parser<'a>)
-> ParseResult<Option<Self>>;
}