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|
const COMMON_MOSQUITTO_CONFIG_FILENAME: &str = "tedge-mosquitto.conf";
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct ListenerConfig {
pub port: Option<u16>,
pub bind_address: Option<String>,
pub bind_interface: Option<String>,
pub allow_anonymous: bool,
pub capath: Option<String>,
pub certfile: Option<String>,
pub keyfile: Option<String>,
pub require_certificate: bool,
}
impl Default for ListenerConfig {
fn default() -> Self {
Self {
port: None,
bind_address: None,
bind_interface: None,
allow_anonymous: false,
capath: None,
certfile: None,
keyfile: None,
require_certificate: true,
}
}
}
impl ListenerConfig {
fn maybe_writeln<W: std::io::Write + ?Sized, D: std::fmt::Display>(
&self,
writer: &mut W,
key: &str,
value: Option<D>,
) -> std::io::Result<()> {
value
.map(|v| self.writeln(writer, key, v))
.unwrap_or(Ok(()))
}
fn writeln<W: std::io::Write + ?Sized, D: std::fmt::Display>(
&self,
writer: &mut W,
key: &str,
value: D,
) -> std::io::Result<()> {
writeln!(writer, "{} {}", key, value)
}
pub fn write(&self, writer: &mut dyn std::io::Write) -> std::io::Result<()> {
let bind_address = self.bind_address.clone().unwrap_or_else(|| "".to_string());
let maybe_listener = self
.port
.as_ref()
.map(|port| format!("{} {}", port, bind_address));
match maybe_listener {
None => Ok(()),
Some(listener) => {
self.writeln(writer, "listener", listener)?;
self.writeln(writer, "allow_anonymous", self.allow_anonymous)?;
self.writeln(writer, "require_certificate", self.require_certificate)?;
self.maybe_writeln(writer, "bind_interface", self.bind_interface.as_ref())?;
self.maybe_writeln(writer, "capath", self.capath.as_ref())?;
self.maybe_writeln(writer, "certfile", self.certfile.as_ref())?;
self.maybe_writeln(writer, "keyfile", self.keyfile.as_ref())
}
}
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct CommonMosquittoConfig {
pub config_file: String,
pub internal_listener: ListenerConfig,
pub external_listener: ListenerConfig,
pub log_types: Vec<String>,
pub message_size_limit: u32,
}
impl Default for CommonMosquittoConfig {
fn default() -> Self {
CommonMosquittoConfig {
config_file: COMMON_MOSQUITTO_CONFIG_FILENAME.into(),
internal_listener: ListenerConfig {
port: Some(1883),
bind_address: Some("localhost".into()),
allow_anonymous: true,
require_certificate: false,
..Default::default()
},
external_listener: Default::default(),
log_types: vec![
"error".into(),
"warning".into(),
"notice".into(),
"information".into(),
"subscribe".into(),
"unsubscribe".into(),
],
message_size_limit: 268435455,
}
}
}
impl CommonMosquittoConfig {
pub fn serialize<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<()> {
writeln!(writer, "per_listener_settings true")?;
writeln!(writer, "connection_messages true")?;
for log_type in &self.log_types {
writeln!(writer, "log_type {}", log_type)?;
}
writeln!(writer, "message_size_limit {}", self.message_size_limit)?;
self.internal_listener.write(writer)?;
self.external_listener.write(writer)?;
Ok(())
}
pub fn with_internal_opts(self, port: u16, bind_address: String) -> Self {
let internal_listener = ListenerConfig {
port: Some(port),
bind_address: Some(bind_address),
..self.internal_listener
};
Self {
internal_listener,
..self
}
}
pub fn with_external_opts(
self,
port: Option<u16>,
bind_address: Option<String>,
bind_interface: Option<String>,
capath: Option<String>,
certfile: Option<String>,
keyfile: Option<String>,
) -> Self {
let mut external_listener = ListenerConfig {
port,
bind_address,
bind_interface,
capath,
certfile,
keyfile,
allow_anonymous: true,
require_certificate: false,
};
if external_listener.capath.is_some() {
external_listener.allow_anonymous = false;
external_listener.require_certificate = true;
}
Self {
external_listener,
..self
}
}
}
#[test]
fn test_serialize() -> anyhow::Result<()> {
let common_mosquitto_config = CommonMosquittoConfig::default();
let mut buffer = Vec::new();
common_mosquitto_config.serialize(&mut buffer)?;
let contents = String::from_utf8(buffer).unwrap();
let config_set: std::collections::HashSet<&str> = contents
.lines()
.filter(|str| !str.is_empty() && !str.starts_with('#'))
.collect();
let mut expected = std::collections::HashSet::new();
expected.insert("listener 1883 localhost");
expected.insert("allow_anonymous true");
expected.insert("connection_messages true");
expected.insert("log_type error");
expected.insert("log_type warning");
expected.insert("log_type notice");
expected.insert("log_type information");
expected.insert("log_type subscribe");
expected.insert("log_type unsubscribe");
expected.insert("message_size_limit 268435455");
expected.insert("per_listener_settings true");
expected.insert("require_certificate false");
assert_eq!(config_set, expected);
Ok(())
}
#[test]
fn test_serialize_with_opts() -> anyhow::Result<()> {
let common_mosquitto_config = CommonMosquittoConfig::default();
let mosquitto_config_with_opts = common_mosquitto_config
.with_internal_opts(1234, "1.2.3.4".into())
.with_external_opts(
Some(2345),
Some("0.0.0.0".to_string()),
Some("wlan0".into()),
Some("/etc/ssl/certs".into()),
Some("cert.pem".into()),
Some("key.pem".into()),
);
assert!(mosquitto_config_with_opts
.internal_listener
.port
.eq(&Some(1234)));
let mut buffer = Vec::new();
mosquitto_config_with_opts.serialize(&mut buffer)?;
let contents = String::from_utf8(buffer).unwrap();
let expected = concat!(
"per_listener_settings true\n",
"connection_messages true\n",
"log_type error\n",
"log_type warning\n",
"log_type notice\n",
"log_type information\n",
"log_type subscribe\n",
"log_type unsubscribe\n",
"message_size_limit 268435455\n",
"listener 1234 1.2.3.4\n",
"allow_anonymous true\n",
"require_certificate false\n",
"listener 2345 0.0.0.0\n",
"allow_anonymous false\n",
"require_certificate true\n",
"bind_interface wlan0\n",
"capath /etc/ssl/certs\n",
"certfile cert.pem\n"
|
