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#[forbid(unsafe_code)]
#[macro_use]
extern crate log;
pub mod client;
pub mod server;
pub mod util;
use std::fmt;
use std::io;
use thiserror::Error;
#[rustfmt::skip]
pub mod consts {
pub const SOCKS5_VERSION: u8 = 0x05;
pub const SOCKS5_AUTH_METHOD_NONE: u8 = 0x00;
pub const SOCKS5_AUTH_METHOD_GSSAPI: u8 = 0x01;
pub const SOCKS5_AUTH_METHOD_PASSWORD: u8 = 0x02;
pub const SOCKS5_AUTH_METHOD_NOT_ACCEPTABLE: u8 = 0xff;
pub const SOCKS5_CMD_TCP_CONNECT: u8 = 0x01;
pub const SOCKS5_CMD_TCP_BIND: u8 = 0x02;
pub const SOCKS5_CMD_UDP_ASSOCIATE: u8 = 0x03;
pub const SOCKS5_ADDR_TYPE_IPV4: u8 = 0x01;
pub const SOCKS5_ADDR_TYPE_DOMAIN_NAME: u8 = 0x03;
pub const SOCKS5_ADDR_TYPE_IPV6: u8 = 0x04;
pub const SOCKS5_REPLY_SUCCEEDED: u8 = 0x00;
pub const SOCKS5_REPLY_GENERAL_FAILURE: u8 = 0x01;
pub const SOCKS5_REPLY_CONNECTION_NOT_ALLOWED: u8 = 0x02;
pub const SOCKS5_REPLY_NETWORK_UNREACHABLE: u8 = 0x03;
pub const SOCKS5_REPLY_HOST_UNREACHABLE: u8 = 0x04;
pub const SOCKS5_REPLY_CONNECTION_REFUSED: u8 = 0x05;
pub const SOCKS5_REPLY_TTL_EXPIRED: u8 = 0x06;
pub const SOCKS5_REPLY_COMMAND_NOT_SUPPORTED: u8 = 0x07;
pub const SOCKS5_REPLY_ADDRESS_TYPE_NOT_SUPPORTED: u8 = 0x08;
}
#[derive(Debug, PartialEq)]
pub enum AuthenticationMethod {
None,
Password { username: String, password: String },
}
impl AuthenticationMethod {
#[inline]
#[rustfmt::skip]
fn as_u8(&self) -> u8 {
match self {
AuthenticationMethod::None => consts::SOCKS5_AUTH_METHOD_NONE,
AuthenticationMethod::Password {..} =>
consts::SOCKS5_AUTH_METHOD_PASSWORD
}
}
#[inline]
#[rustfmt::skip]
fn from_u8(code: u8) -> Option<AuthenticationMethod> {
match code {
consts::SOCKS5_AUTH_METHOD_NONE => Some(AuthenticationMethod::None),
consts::SOCKS5_AUTH_METHOD_PASSWORD => Some(AuthenticationMethod::Password { username: "test".to_string(), password: "test".to_string()}),
_ => None,
}
}
}
impl fmt::Display for AuthenticationMethod {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
AuthenticationMethod::None => f.write_str("AuthenticationMethod::None"),
AuthenticationMethod::Password { .. } => f.write_str("AuthenticationMethod::Password"),
}
}
}
#[derive(Error, Debug)]
pub enum SocksError {
#[error("i/o error: {0}")]
Io(#[from] io::Error),
#[error("request timeout: {0}")]
FutureTimeout(#[from] async_std::future::TimeoutError),
#[error("the data for key `{0}` is not available")]
Redaction(String),
#[error("invalid header (expected {expected:?}, found {found:?})")]
InvalidHeader { expected: String, found: String },
#[error("Auth method unacceptable `{0:?}`.")]
AuthMethodUnacceptable(Vec<u8>),
#[error("Unsupported SOCKS version `{0}`.")]
UnsupportedSocksVersion(u8),
#[error("Domain exceeded max sequence length")]
ExceededMaxDomainLen(usize),
#[error("Authentication failed `{0}`")]
AuthenticationFailed(String),
#[error("Authentication rejected `{0}`")]
AuthenticationRejected(String),
#[error("Error with reply: {0}.")]
ReplyError(#[from] ReplyError),
#[error("Argument input error: `{0}`.")]
ArgumentInputError(&'static str),
#[error(transparent)]
Other(#[from] anyhow::Error),
}
pub type Result<T, E = SocksError> = core::result::Result<T, E>;
#[derive(Error, Debug, Copy, Clone)]
pub enum ReplyError {
#[error("General failure")]
GeneralFailure,
#[error("Connection not allowed by ruleset")]
ConnectionNotAllowed,
#[error("Network unreachable")]
NetworkUnreachable,
#[error("Host unreachable")]
HostUnreachable,
#[error("Connection refused")]
ConnectionRefused,
#[error("TTL expired")]
TtlExpired,
#[error("Command not supported")]
CommandNotSupported,
#[error("Address type not supported")]
AddressTypeNotSupported,
}
impl ReplyError {
#[inline]
#[rustfmt::skip]
pub fn as_u8(self) -> u8 {
match self {
ReplyError::GeneralFailure => consts::SOCKS5_REPLY_GENERAL_FAILURE,
ReplyError::ConnectionNotAllowed => consts::SOCKS5_REPLY_CONNECTION_NOT_ALLOWED,
ReplyError::NetworkUnreachable => consts::SOCKS5_REPLY_NETWORK_UNREACHABLE,
ReplyError::HostUnreachable => consts::SOCKS5_REPLY_HOST_UNREACHABLE,
ReplyError::ConnectionRefused => consts::SOCKS5_REPLY_CONNECTION_REFUSED,
ReplyError::TtlExpired => consts::SOCKS5_REPLY_TTL_EXPIRED,
ReplyError::CommandNotSupported => consts::SOCKS5_REPLY_COMMAND_NOT_SUPPORTED,
ReplyError::AddressTypeNotSupported => consts::SOCKS5_REPLY_ADDRESS_TYPE_NOT_SUPPORTED,
}
}
#[inline]
#[rustfmt::skip]
pub fn from_u8(code: u8) -> ReplyError {
match code {
consts::SOCKS5_REPLY_GENERAL_FAILURE => ReplyError::GeneralFailure,
consts::SOCKS5_REPLY_CONNECTION_NOT_ALLOWED => ReplyError::ConnectionNotAllowed,
consts::SOCKS5_REPLY_NETWORK_UNREACHABLE => ReplyError::NetworkUnreachable,
consts::SOCKS5_REPLY_HOST_UNREACHABLE => ReplyError::HostUnreachable,
consts::SOCKS5_REPLY_CONNECTION_REFUSED => ReplyError::ConnectionRefused,
consts::SOCKS5_REPLY_TTL_EXPIRED => ReplyError::TtlExpired,
consts::SOCKS5_REPLY_COMMAND_NOT_SUPPORTED => ReplyError::CommandNotSupported,
consts::SOCKS5_REPLY_ADDRESS_TYPE_NOT_SUPPORTED => ReplyError::AddressTypeNotSupported,
_ => unreachable!("ReplyError code unsupported."),
}
}
}