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use crate::prelude::*;
use serde::de::Deserialize as _;
use std::convert::TryFrom as _;
use std::net::ToSocketAddrs as _;
const DEFAULT_LISTEN_ADDRESS: &str = "127.0.0.1:4144";
const DEFAULT_CONNECT_ADDRESS: &str = "127.0.0.1:4144";
const DEFAULT_CONNECTION_BUFFER_SIZE: usize = 4 * 1024 * 1024;
const DEFAULT_READ_TIMEOUT: std::time::Duration =
std::time::Duration::from_secs(120);
const DEFAULT_AUTH_TYPE: crate::protocol::AuthType =
crate::protocol::AuthType::Plain;
const DEFAULT_TLS: bool = false;
const DEFAULT_TTYREC_FILENAME: &str = "teleterm.ttyrec";
pub trait Config: std::fmt::Debug {
fn merge_args<'a>(
&mut self,
matches: &clap::ArgMatches<'a>,
) -> Result<()>;
fn run(&self) -> Result<()>;
}
pub fn listen_address<'a, D>(
deserializer: D,
) -> std::result::Result<std::net::SocketAddr, D::Error>
where
D: serde::de::Deserializer<'a>,
{
to_listen_address(&<String>::deserialize(deserializer)?)
.map_err(serde::de::Error::custom)
}
pub fn default_listen_address() -> std::net::SocketAddr {
to_listen_address(DEFAULT_LISTEN_ADDRESS).unwrap()
}
pub fn to_listen_address(address: &str) -> Result<std::net::SocketAddr> {
address.parse().context(crate::error::ParseAddr)
}
pub fn connect_address<'a, D>(
deserializer: D,
) -> std::result::Result<(String, std::net::SocketAddr), D::Error>
where
D: serde::de::Deserializer<'a>,
{
to_connect_address(&<String>::deserialize(deserializer)?)
.map_err(serde::de::Error::custom)
}
pub fn default_connect_address() -> (String, std::net::SocketAddr) {
to_connect_address(DEFAULT_CONNECT_ADDRESS).unwrap()
}
// XXX this does a blocking dns lookup - should try to find an async version
pub fn to_connect_address(
address: &str,
) -> Result<(String, std::net::SocketAddr)> {
let mut address_parts = address.split(':');
let host = address_parts.next().context(crate::error::ParseAddress)?;
let port = address_parts.next().context(crate::error::ParseAddress)?;
let port: u16 = port.parse().context(crate::error::ParsePort)?;
let socket_addr = (host, port)
.to_socket_addrs()
.context(crate::error::ResolveAddress)?
.next()
.context(crate::error::HasResolvedAddr)?;
Ok((host.to_string(), socket_addr))
}
pub fn default_connection_buffer_size() -> usize {
DEFAULT_CONNECTION_BUFFER_SIZE
}
pub fn read_timeout<'a, D>(
deserializer: D,
) -> std::result::Result<std::time::Duration, D::Error>
where
D: serde::de::Deserializer<'a>,
{
Ok(std::time::Duration::from_secs(u64::deserialize(
deserializer,
)?))
}
pub fn default_read_timeout() -> std::time::Duration {
DEFAULT_READ_TIMEOUT
}
pub fn default_tls() -> bool {
DEFAULT_TLS
}
pub fn default_command() -> String {
std::env::var("SHELL").unwrap_or_else(|_| "/bin/bash".to_string())
}
pub fn default_args() -> Vec<String> {
vec![]
}
pub fn default_ttyrec_filename() -> String {
DEFAULT_TTYREC_FILENAME.to_string()
}
pub fn default_allowed_login_methods(
) -> std::collections::HashSet<crate::protocol::AuthType> {
crate::protocol::AuthType::iter().collect()
}
pub fn allowed_login_methods<'a, D>(
deserializer: D,
) -> std::result::Result<
std::collections::HashSet<crate::protocol::AuthType>,
D::Error,
>
where
D: serde::de::Deserializer<'a>,
{
struct StringOrVec;
impl<'a> serde::de::Visitor<'a> for StringOrVec {
type Value = Vec<String>;
fn expecting(
&self,
formatter: &mut std::fmt::Formatter,
) -> std::fmt::Result {
formatter.write_str("string or list")
}
fn visit_str<E>(
self,
value: &str,
) -> std::result::Result<Self::Value, E>
where
E: serde::de::Error,
{
Ok(value
.split(',')
.map(std::string::ToString::to_string)
.collect())
}
fn visit_seq<A>(
self,
seq: A,
) -> std::result::Result<Self::Value, A::Error>
where
A: serde::de::SeqAccess<'a>,
{
serde::de::Deserialize::deserialize(
serde::de::value::SeqAccessDeserializer::new(seq),
)
}
}
deserializer
.deserialize_any(StringOrVec)?
.iter()
.map(|s| {
crate::protocol::AuthType::try_from(s.as_str())
.map_err(serde::de::Error::custom)
})
.collect()
}
pub fn auth<'a, D>(
deserializer: D,
) -> std::result::Result<crate::protocol::Auth, D::Error>
where
D: serde::de::Deserializer<'a>,
{
LoginType::deserialize(deserializer).and_then(|login_type| {
match login_type.login_type {
crate::protocol::AuthType::Plain => login_type
.username
.map(std::string::ToString::to_string)
.or_else(default_username)
.ok_or_else(|| Error::CouldntFindUsername)
.map(|username| crate::protocol::Auth::Plain { username })
.map_err(serde::de::Error::custom),
crate::protocol::AuthType::RecurseCenter => {
Ok(crate::protocol::Auth::RecurseCenter {
id: login_type.id.map(std::string::ToString::to_string),
})
}
}
})
}
pub fn default_auth() -> crate::protocol::Auth {
let username = default_username()
.ok_or_else(|| Error::CouldntFindUsername)
.unwrap();
crate::protocol::Auth::Plain { username }
}
#[derive(serde::Deserialize)]
struct LoginType<'a> {
#[serde(deserialize_with = "auth_type", default = "default_auth_type")]
login_type: crate::protocol::AuthType,
username: Option<&'a str>,
id: Option<&'a str>,
}
fn auth_type<'a, D>(
deserializer: D,
) -> std::result::Result<crate::protocol::AuthType, D::Error>
where
D: serde::de::Deserializer<'a>,
{
crate::protocol::AuthType::try_from(
<String>::deserialize(deserializer)?.as_ref(),
)
.map_err(serde::de::Error::custom)
}
fn default_auth_type() -> crate::protocol::AuthType {
DEFAULT_AUTH_TYPE
}
fn default_username() -> Option<String> {
std::env::var("USER").ok()
}
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