63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
use std::net::IpAddr;
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use serde_derive::{Deserialize, Serialize};
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type Version = u8;
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const CONF_VERSION: Version = 0;
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#[derive(Default, Debug, Serialize, Deserialize)]
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pub struct Configuration {
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/// The version of the configuration. This is a MAJOR configuration only;
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/// it should be incremented whenever breaking changes to the configuration
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/// are made.
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pub version: Version,
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/// The IP to listen on for incoming user datagrams (excluding port).
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pub ip: String,
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/// The port to listen on for incoming user datagrams.
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pub port: u16,
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}
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#[derive(Debug)]
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pub enum ConfigurationError {
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InvalidIp,
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IncompatibleVersion(Version),
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}
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impl std::fmt::Display for ConfigurationError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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ConfigurationError::IncompatibleVersion(v) => write!(f,
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"Expected configuration version {} but got version {}.",
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CONF_VERSION, v),
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ConfigurationError::InvalidIp => write!(f, "Invalid IP."),
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}
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}
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}
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impl std::error::Error for ConfigurationError {}
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impl Configuration {
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pub fn check(&self) -> Result<(), ConfigurationError> {
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self.check_version()?;
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self.check_ip()?;
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// No need to check the port; any u16 is a valid port.
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Ok(())
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}
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fn check_version(&self) -> Result<(), ConfigurationError> {
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if self.version != CONF_VERSION {
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Err(ConfigurationError::IncompatibleVersion(self.version))
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} else {
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Ok(())
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}
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}
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fn check_ip(&self) -> Result<(), ConfigurationError> {
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if self.ip.parse::<std::net::IpAddr>().is_err() {
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Err(ConfigurationError::InvalidIp)
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} else {
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Ok(())
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}
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}
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}
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