async_proxy/clients/
socks4.rs

1use std::fmt;
2
3/// Holds implementation of the actual socks4 protocol
4pub mod general;
5
6/// Holds implementation of the socks4 protocol but
7/// without ident being passed when establishing
8/// connection
9pub mod no_ident;
10
11pub use general::Socks4General;
12pub use no_ident::Socks4NoIdent;
13
14/// Represents a Socks4 protocol command
15#[repr(u8)]
16pub enum Command {
17    TcpConnectionEstablishment = 1,
18    TcpPortBinding
19}
20
21/// Represents a Socks4 protocol error
22/// that can occur when connecting to
23/// a destination
24pub enum ErrorKind {
25    /// Indicates that an error occured
26    /// during a native I/O operation,
27    /// such as writing to or reading from
28    /// a stream
29    IOError(std::io::Error),
30    /// Indicates that a bad (wrong, not readable by Socks4)
31    /// buffer is received
32    BadBuffer,
33    /// Indicates that the request (for ex., for connection)
34    /// is denied
35    RequestDenied,
36    /// Indicates that the `Ident` service
37    /// is not available on the server side
38    IdentIsUnavailable,
39    /// Indicates that a bad ident is passed
40    /// in a payload so that the server refused
41    /// a connection request
42    BadIdent,
43    /// Indicates that a timeouts has been reached
44    /// when connecting to a service
45    OperationTimeoutReached
46}
47
48impl fmt::Display for ErrorKind {
49    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
50        match self {
51            ErrorKind::IOError(e) 
52                => f.write_str(&format!("I/O error: {}", e)),
53            ErrorKind::BadBuffer => f.write_str("bad buffer has been received"),
54            ErrorKind::RequestDenied => f.write_str("request denied"),
55            ErrorKind::IdentIsUnavailable => f.write_str("ident is unavailable"),
56            ErrorKind::BadIdent => f.write_str("bad ident"),
57            ErrorKind::OperationTimeoutReached => f.write_str("operation timeout reached")
58        }
59    }
60}
async_proxy/clients/socks4.rs

async_proxy/clients/
socks4.rs
