111 lines
3.2 KiB
Rust
111 lines
3.2 KiB
Rust
use std::{
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net::{SocketAddr, ToSocketAddrs, UdpSocket},
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time::Duration,
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};
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use socket2::{Domain, Protocol, Socket, Type};
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use crate::{
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config::{ClientConfig, SocketConfig, DEFAULT_PORT, MIN_OPEN_TIMEOUT},
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error::ClientError,
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};
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pub(crate) fn validate_open_timeouts(timeouts: &[Duration]) -> Result<(), ClientError> {
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if timeouts.is_empty() {
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return Err(ClientError::NoOpenTimeouts);
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}
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for timeout in timeouts {
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if *timeout < MIN_OPEN_TIMEOUT {
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return Err(ClientError::OpenTimeoutTooSmall {
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timeout: *timeout,
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minimum: MIN_OPEN_TIMEOUT,
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});
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}
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}
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Ok(())
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}
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pub(crate) fn resolve_remote(config: &ClientConfig) -> Result<SocketAddr, ClientError> {
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let addr = normalize_server_addr(&config.server_addr);
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let mut addrs = addr
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.to_socket_addrs()
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.map_err(|_| ClientError::Resolve { addr: addr.clone() })?;
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addrs
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.find(|addr| {
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(!config.socket_config.ipv4_only || addr.is_ipv4())
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&& (!config.socket_config.ipv6_only || addr.is_ipv6())
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})
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.ok_or(ClientError::Resolve { addr })
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}
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pub(crate) fn normalize_server_addr(addr: &str) -> String {
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if addr.parse::<SocketAddr>().is_ok() {
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return addr.to_owned();
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}
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if addr.starts_with('[') && addr.ends_with(']') {
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return format!("{addr}:{DEFAULT_PORT}");
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}
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if addr.starts_with('[') {
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return addr.to_owned();
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}
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if addr.parse::<std::net::Ipv6Addr>().is_ok() {
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return format!("[{addr}]:{DEFAULT_PORT}");
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}
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if addr
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.rsplit_once(':')
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.is_some_and(|(_, port)| port.parse::<u16>().is_ok())
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{
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return addr.to_owned();
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}
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format!("{addr}:{DEFAULT_PORT}")
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}
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pub(crate) fn connect_udp_socket(
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config: &SocketConfig,
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remote: SocketAddr,
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) -> Result<UdpSocket, ClientError> {
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let domain = if remote.is_ipv4() {
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Domain::IPV4
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} else {
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Domain::IPV6
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};
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let socket = Socket::new(domain, Type::DGRAM, Some(Protocol::UDP))?;
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if config.ipv6_only && remote.is_ipv6() {
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socket.set_only_v6(true)?;
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}
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if let Some(ttl) = config.ttl {
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socket.set_ttl(ttl)?;
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}
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let bind_addr = config.bind_addr.unwrap_or_else(|| {
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if remote.is_ipv4() {
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SocketAddr::from(([0, 0, 0, 0], 0))
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} else {
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SocketAddr::from(([0_u16; 8], 0))
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}
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});
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socket.bind(&bind_addr.into())?;
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socket.connect(&remote.into())?;
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let socket: UdpSocket = socket.into();
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socket.set_read_timeout(config.recv_timeout)?;
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Ok(socket)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn normalize_server_addr_adds_default_ports() {
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assert_eq!(normalize_server_addr("127.0.0.1"), "127.0.0.1:2112");
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assert_eq!(normalize_server_addr("127.0.0.1:1234"), "127.0.0.1:1234");
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assert_eq!(normalize_server_addr("localhost"), "localhost:2112");
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assert_eq!(normalize_server_addr("localhost:1234"), "localhost:1234");
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assert_eq!(normalize_server_addr("::1"), "[::1]:2112");
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assert_eq!(normalize_server_addr("[::1]"), "[::1]:2112");
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assert_eq!(normalize_server_addr("[::1]:1234"), "[::1]:1234");
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}
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}
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