feat(turn): move config to table & error when no config is set

docs/turn.md

@@ -7,17 +7,18 @@
 ## Edit/Add a few settings to your existing conduit.toml
 
 ```
+[turn]
 # Refer to your Coturn settings. 
 # `your.turn.url` has to match the REALM setting of your Coturn as well as `transport`.
-turn_uris = ["turn:your.turn.url?transport=udp", "turn:your.turn.url?transport=tcp"]
+uris = ["turn:your.turn.url?transport=udp", "turn:your.turn.url?transport=tcp"]
 
 # static-auth-secret of your turnserver
-turn_secret = "ADD SECRET HERE"
+secret = "ADD SECRET HERE"
 
 # If you have your TURN server configured to use a username and password
 # you can provide these information too. In this case comment out `turn_secret above`!
-#turn_username = ""
-#turn_password = ""
+#username = ""
+#password = ""
 ```
 
 ## Apply settings

src/api/client_server/voip.rs

@@ -1,7 +1,10 @@
-use crate::{services, Result, Ruma};
+use crate::{config::TurnAuth, services, Error, Result, Ruma};
 use base64::{engine::general_purpose, Engine as _};
 use hmac::{Hmac, Mac};
-use ruma::{api::client::voip::get_turn_server_info, SecondsSinceUnixEpoch};
+use ruma::{
+    api::client::{error::ErrorKind, voip::get_turn_server_info},
+    SecondsSinceUnixEpoch,
+};
 use sha1::Sha1;
 use std::time::{Duration, SystemTime};
 
@@ -9,40 +12,41 @@ type HmacSha1 = Hmac<Sha1>;
 
 /// # `GET /_matrix/client/r0/voip/turnServer`
 ///
-/// TODO: Returns information about the recommended turn server.
+/// Returns information about the recommended turn server.
 pub async fn turn_server_route(
     body: Ruma<get_turn_server_info::v3::Request>,
 ) -> Result<get_turn_server_info::v3::Response> {
     let sender_user = body.sender_user.as_ref().expect("user is authenticated");
 
-    let turn_secret = services().globals.turn_secret().clone();
-
-    let (username, password) = if !turn_secret.is_empty() {
-        let expiry = SecondsSinceUnixEpoch::from_system_time(
-            SystemTime::now() + Duration::from_secs(services().globals.turn_ttl()),
-        )
-        .expect("time is valid");
-
-        let username: String = format!("{}:{}", expiry.get(), sender_user);
-
-        let mut mac = HmacSha1::new_from_slice(turn_secret.as_bytes())
-            .expect("HMAC can take key of any size");
-        mac.update(username.as_bytes());
-
-        let password: String = general_purpose::STANDARD.encode(mac.finalize().into_bytes());
-
-        (username, password)
+    if let Some(turn) = services().globals.turn() {
+        let (username, password) = match turn.auth {
+            TurnAuth::Secret { secret } => {
+                let expiry = SecondsSinceUnixEpoch::from_system_time(
+                    SystemTime::now() + Duration::from_secs(turn.ttl),
+                )
+                .expect("time is valid");
+
+                let username: String = format!("{}:{}", expiry.get(), sender_user);
+
+                let mut mac = HmacSha1::new_from_slice(secret.as_bytes())
+                    .expect("HMAC can take key of any size");
+                mac.update(username.as_bytes());
+
+                let password: String =
+                    general_purpose::STANDARD.encode(mac.finalize().into_bytes());
+
+                (username, password)
+            }
+            TurnAuth::UserPass { username, password } => (username, password),
+        };
+
+        Ok(get_turn_server_info::v3::Response {
+            username,
+            password,
+            uris: turn.uris,
+            ttl: Duration::from_secs(turn.ttl),
+        })
     } else {
-        (
-            services().globals.turn_username().clone(),
-            services().globals.turn_password().clone(),
-        )
-    };
-
-    Ok(get_turn_server_info::v3::Response {
-        username,
-        password,
-        uris: services().globals.turn_uris().to_vec(),
-        ttl: Duration::from_secs(services().globals.turn_ttl()),
-    })
+        Err(Error::BadRequest(ErrorKind::NotFound, "No TURN config set"))
+    }
 }

src/config/mod.rs

@@ -72,17 +72,15 @@ pub struct Config {
     pub trusted_servers: Vec<OwnedServerName>,
     #[serde(default = "default_log")]
     pub log: String,
-    #[serde(default)]
-    pub turn_username: String,
-    #[serde(default)]
-    pub turn_password: String,
-    #[serde(default = "Vec::new")]
-    pub turn_uris: Vec<String>,
-    #[serde(default)]
-    pub turn_secret: String,
+    pub turn_username: Option<String>,
+    pub turn_password: Option<String>,
+    pub turn_uris: Option<Vec<String>>,
+    pub turn_secret: Option<String>,
     #[serde(default = "default_turn_ttl")]
     pub turn_ttl: u64,
 
+    pub turn: Option<TurnConfig>,
+
     pub emergency_password: Option<String>,
 
     #[serde(flatten)]
@@ -95,6 +93,22 @@ pub struct TlsConfig {
     pub key: String,
 }
 
+#[derive(Clone, Debug, Deserialize)]
+pub struct TurnConfig {
+    pub uris: Vec<String>,
+    #[serde(default = "default_turn_ttl")]
+    pub ttl: u64,
+    #[serde(flatten)]
+    pub auth: TurnAuth,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+#[serde(untagged)]
+pub enum TurnAuth {
+    UserPass { username: String, password: String },
+    Secret { secret: String },
+}
+
 #[derive(Clone, Debug, Deserialize, Default)]
 pub struct WellKnownConfig {
     #[serde(rename = "well_known_client")]
@@ -103,7 +117,14 @@ pub struct WellKnownConfig {
     pub server: Option<OwnedServerName>,
 }
 
-const DEPRECATED_KEYS: &[&str] = &["cache_capacity"];
+const DEPRECATED_KEYS: &[&str] = &[
+    "cache_capacity",
+    "turn_username",
+    "turn_password",
+    "turn_uris",
+    "turn_secret",
+    "turn_ttl",
+];
 
 impl Config {
     pub fn warn_deprecated(&self) {
@@ -146,6 +167,32 @@ impl Config {
             }
         }
     }
+
+    pub fn turn(&self) -> Option<TurnConfig> {
+        if self.turn.is_some() {
+            self.turn.clone()
+        } else if let Some(uris) = self.turn_uris.clone() {
+            if let Some(secret) = self.turn_secret.clone() {
+                Some(TurnConfig {
+                    uris,
+                    ttl: self.turn_ttl,
+                    auth: TurnAuth::Secret { secret },
+                })
+            } else if let (Some(username), Some(password)) =
+                (self.turn_username.clone(), self.turn_password.clone())
+            {
+                Some(TurnConfig {
+                    uris,
+                    ttl: self.turn_ttl,
+                    auth: TurnAuth::UserPass { username, password },
+                })
+            } else {
+                None
+            }
+        } else {
+            None
+        }
+    }
 }
 
 impl fmt::Display for Config {
@@ -201,37 +248,18 @@ impl fmt::Display for Config {
                 }
                 &lst.join(", ")
             }),
-            (
-                "TURN username",
-                if self.turn_username.is_empty() {
-                    "not set"
-                } else {
-                    &self.turn_username
-                },
-            ),
-            ("TURN password", {
-                if self.turn_password.is_empty() {
-                    "not set"
-                } else {
-                    "set"
-                }
-            }),
-            ("TURN secret", {
-                if self.turn_secret.is_empty() {
-                    "not set"
+            ("TURN URIs", {
+                if let Some(turn) = self.turn() {
+                    let mut lst = vec![];
+                    for item in turn.uris.iter().cloned().enumerate() {
+                        let (_, uri): (usize, String) = item;
+                        lst.push(uri);
+                    }
+                    &lst.join(", ")
                 } else {
-                    "set"
+                    "unset"
                 }
             }),
-            ("Turn TTL", &self.turn_ttl.to_string()),
-            ("Turn URIs", {
-                let mut lst = vec![];
-                for item in self.turn_uris.iter().cloned().enumerate() {
-                    let (_, uri): (usize, String) = item;
-                    lst.push(uri);
-                }
-                &lst.join(", ")
-            }),
             ("Well-known server name", well_known_server.as_str()),
             ("Well-known client URL", &self.well_known_client()),
         ];

src/service/globals/mod.rs

@@ -7,7 +7,7 @@ use ruma::{
 
 use crate::api::server_server::DestinationResponse;
 
-use crate::{services, Config, Error, Result};
+use crate::{config::TurnConfig, services, Config, Error, Result};
 use futures_util::FutureExt;
 use hickory_resolver::TokioAsyncResolver;
 use hyper_util::client::legacy::connect::dns::{GaiResolver, Name as HyperName};
@@ -348,6 +348,10 @@ impl Service {
         &self.config.trusted_servers
     }
 
+    pub fn turn(&self) -> Option<TurnConfig> {
+        self.config.turn()
+    }
+
     pub fn dns_resolver(&self) -> &TokioAsyncResolver {
         &self.dns_resolver
     }
@@ -356,26 +360,6 @@ impl Service {
         self.jwt_decoding_key.as_ref()
     }
 
-    pub fn turn_password(&self) -> &String {
-        &self.config.turn_password
-    }
-
-    pub fn turn_ttl(&self) -> u64 {
-        self.config.turn_ttl
-    }
-
-    pub fn turn_uris(&self) -> &[String] {
-        &self.config.turn_uris
-    }
-
-    pub fn turn_username(&self) -> &String {
-        &self.config.turn_username
-    }
-
-    pub fn turn_secret(&self) -> &String {
-        &self.config.turn_secret
-    }
-
     pub fn emergency_password(&self) -> &Option<String> {
         &self.config.emergency_password
     }