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
|
use std::{
io::{BufRead, Read, Result, Write},
net::Ipv4Addr,
};
pub fn write<W: Write>(mut writer: W, v: &[u8]) -> Result<()> {
writer.write_all(v)
}
pub fn write_u8<W: Write>(mut writer: W, v: u8) -> Result<()> {
writer.write_all(&[v])
}
pub fn write_u16<W: Write>(mut writer: W, v: u16) -> Result<()> {
writer.write_all(&u16::to_be_bytes(v))
}
pub fn write_u32<W: Write>(mut writer: W, v: u32) -> Result<()> {
writer.write_all(&u32::to_be_bytes(v))
}
pub fn write_ipv4<W: Write>(mut writer: W, v: Ipv4Addr) -> Result<()> {
writer.write_all(&v.octets())
}
pub fn write_null_terminated_string<W: Write>(mut writer: W, v: &str) -> Result<()> {
writer.write_all(v.as_bytes())?;
writer.write_all(&[0u8])
}
pub fn read_u8<R: Read>(mut reader: R) -> Result<u8> {
let mut buf = [0u8; 1];
reader.read_exact(&mut buf)?;
Ok(buf[0])
}
pub fn read_u16<R: Read>(mut reader: R) -> Result<u16> {
let mut buf = [0u8; 2];
reader.read_exact(&mut buf)?;
Ok(u16::from_be_bytes(buf))
}
pub fn read_u32<R: Read>(mut reader: R) -> Result<u32> {
let mut buf = [0u8; 4];
reader.read_exact(&mut buf)?;
Ok(u32::from_be_bytes(buf))
}
pub fn read_arr<const N: usize, R: Read>(mut reader: R) -> Result<[u8; N]> {
let mut buf = [0u8; N];
reader.read_exact(&mut buf)?;
Ok(buf)
}
pub fn read_null_terminated_vec<R: BufRead>(mut reader: R) -> Result<Vec<u8>> {
let mut buf = Vec::default();
reader.read_until(0, &mut buf)?;
buf.pop();
Ok(buf)
}
pub fn read_null_terminated_string<R: BufRead>(reader: R) -> Result<String> {
let buf = read_null_terminated_vec(reader)?;
Ok(String::from_utf8(buf).unwrap())
}
pub fn read_len8_prefixed_vec<R: BufRead>(mut reader: R) -> Result<Vec<u8>> {
let len = read_u8(&mut reader)?;
let mut buf = vec![0u8; len as usize];
reader.read_exact(&mut buf)?;
Ok(buf)
}
pub fn read_len8_prefixed_string<R: BufRead>(reader: R) -> Result<String> {
let buf = read_len8_prefixed_vec(reader)?;
Ok(String::from_utf8(buf).unwrap())
}
pub fn read_ipv4<R: BufRead>(reader: R) -> Result<Ipv4Addr> {
Ok(Ipv4Addr::from_octets(read_arr(reader)?))
}
|
