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#[cfg(not(feature = "tokio"))]
use futures::io::{AsyncRead, AsyncReadExt};
use thiserror::Error;
#[cfg(feature = "tokio")]
use tokio_compat::io::{AsyncRead, AsyncReadExt};
pub mod v4;
pub mod v5;
#[derive(Debug, Eq, PartialEq)]
pub enum SocksVersion {
V4 = 0x04,
V5 = 0x05,
}
impl SocksVersion {
pub fn from_u8(n: u8) -> Option<SocksVersion> {
match n {
0x04 => Some(SocksVersion::V4),
0x05 => Some(SocksVersion::V5),
_ => None,
}
}
pub fn to_u8(&self) -> u8 {
match self {
SocksVersion::V4 => 0x04,
SocksVersion::V5 => 0x05,
}
}
}
#[derive(Debug, Error)]
pub enum SocksVersionError {
#[error("invalid version {0:x}, expected {:x} or {:x}", SocksVersion::V4.to_u8(), SocksVersion::V5 as u8)]
InvalidVersion(u8),
#[error("{0}")]
Io(
#[from]
#[source]
std::io::Error,
),
}
pub type SocksVersionResult = Result<SocksVersion, SocksVersionError>;
pub async fn read_version<Stream>(mut stream: Stream) -> SocksVersionResult
where
Stream: AsyncRead + Unpin,
{
let mut version = [0u8];
stream.read_exact(&mut version).await?;
Ok(SocksVersion::from_u8(version[0])
.ok_or_else(|| SocksVersionError::InvalidVersion(version[0]))?)
}