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use crate::handle::{ClientHandle, ServerHandle};
use crate::target_configure::{ClientTargetConfig, ServerTargetConfig};
use serde::{Deserialize, Serialize};
use std::{
fmt::{Display, Formatter},
marker::PhantomData,
net::{AddrParseError, IpAddr, Ipv4Addr, SocketAddr},
str::FromStr,
};
use tokio::net::lookup_host;
const DEFAULT_PORT: u16 = 8080;
#[derive(Debug, Serialize, Deserialize)]
pub struct TcpServerTarget<Client, Server>
where
Client: ClientHandle<Server>,
Server: ServerHandle<Client>,
{
/// Client Config
client_cfg: Option<ClientTargetConfig>,
/// Server Config
server_cfg: Option<ServerTargetConfig>,
/// Server port
port: u16,
/// Bind addr
bind_addr: IpAddr,
/// Client Phantom Data
_client: PhantomData<Client>,
/// Server Phantom Data
_server: PhantomData<Server>,
}
impl<Client, Server> Default for TcpServerTarget<Client, Server>
where
Client: ClientHandle<Server>,
Server: ServerHandle<Client>,
{
fn default() -> Self {
Self {
client_cfg: None,
server_cfg: None,
port: DEFAULT_PORT,
bind_addr: IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)),
_client: PhantomData,
_server: PhantomData,
}
}
}
impl<Client, Server> From<SocketAddr> for TcpServerTarget<Client, Server>
where
Client: ClientHandle<Server>,
Server: ServerHandle<Client>,
{
/// Convert SocketAddr to TcpServerTarget
fn from(value: SocketAddr) -> Self {
Self {
port: value.port(),
bind_addr: value.ip(),
..Self::default()
}
}
}
impl<Client, Server> From<TcpServerTarget<Client, Server>> for SocketAddr
where
Client: ClientHandle<Server>,
Server: ServerHandle<Client>,
{
/// Convert TcpServerTarget to SocketAddr
fn from(val: TcpServerTarget<Client, Server>) -> Self {
SocketAddr::new(val.bind_addr, val.port)
}
}
impl<Client, Server> Display for TcpServerTarget<Client, Server>
where
Client: ClientHandle<Server>,
Server: ServerHandle<Client>,
{
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "{}:{}", self.bind_addr, self.port)
}
}
impl<Client, Server> TcpServerTarget<Client, Server>
where
Client: ClientHandle<Server>,
Server: ServerHandle<Client>,
{
/// Create target by address
pub fn from_addr(addr: impl Into<IpAddr>, port: impl Into<u16>) -> Self {
Self {
port: port.into(),
bind_addr: addr.into(),
..Self::default()
}
}
/// Try to create target by string
pub fn from_str<'a>(addr_str: impl Into<&'a str>) -> Result<Self, AddrParseError> {
let socket_addr = SocketAddr::from_str(addr_str.into());
match socket_addr {
Ok(socket_addr) => Ok(Self::from_addr(socket_addr.ip(), socket_addr.port())),
Err(err) => Err(err),
}
}
/// Try to create target by domain name
pub async fn from_domain<'a>(domain: impl Into<&'a str>) -> Result<Self, std::io::Error> {
match domain_to_addr(domain).await {
Ok(domain_addr) => Ok(Self::from(domain_addr)),
Err(e) => Err(e),
}
}
/// Set client config
pub fn client_cfg(mut self, config: ClientTargetConfig) -> Self {
self.client_cfg = Some(config);
self
}
/// Set server config
pub fn server_cfg(mut self, config: ServerTargetConfig) -> Self {
self.server_cfg = Some(config);
self
}
/// Add client config
pub fn add_client_cfg(&mut self, config: ClientTargetConfig) {
self.client_cfg = Some(config);
}
/// Add server config
pub fn add_server_cfg(&mut self, config: ServerTargetConfig) {
self.server_cfg = Some(config);
}
/// Get client config ref
pub fn get_client_cfg(&self) -> Option<&ClientTargetConfig> {
self.client_cfg.as_ref()
}
/// Get server config ref
pub fn get_server_cfg(&self) -> Option<&ServerTargetConfig> {
self.server_cfg.as_ref()
}
/// Get SocketAddr of TcpServerTarget
pub fn get_addr(&self) -> SocketAddr {
SocketAddr::new(self.bind_addr, self.port)
}
}
/// Parse Domain Name to IpAddr via DNS
async fn domain_to_addr<'a>(domain: impl Into<&'a str>) -> Result<SocketAddr, std::io::Error> {
let domain = domain.into();
let default_port: u16 = DEFAULT_PORT;
if let Ok(socket_addr) = domain.parse::<SocketAddr>() {
return Ok(match socket_addr.ip() {
IpAddr::V4(_) => socket_addr,
IpAddr::V6(_) => SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), socket_addr.port()),
});
}
if let Ok(_v6_addr) = domain.parse::<std::net::Ipv6Addr>() {
return Ok(SocketAddr::new(
IpAddr::V4(Ipv4Addr::LOCALHOST),
default_port,
));
}
let (host, port_str) = if let Some((host, port)) = domain.rsplit_once(':') {
(host.trim_matches(|c| c == '[' || c == ']'), Some(port))
} else {
(domain, None)
};
let port = port_str
.and_then(|p| p.parse::<u16>().ok())
.map(|p| p.clamp(0, u16::MAX))
.unwrap_or(default_port);
let mut socket_iter = lookup_host((host, 0)).await?;
if let Some(addr) = socket_iter.find(|addr| addr.is_ipv4()) {
return Ok(SocketAddr::new(addr.ip(), port));
}
Ok(SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), port))
}
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