node: Improve Tor configuration flexibility

*Breaking change* The `tor` configuration field is no longer
supported. Users must remove that field from their config.

Allows for a mixed mode, where regular addresses bypass the Tor proxy,
while onion addresses go through it.

When `onion.mode` is set to "forward", Tor connections are fowarded to
the global proxy, and if it isn't set, to the OS's DNS resolution.

For mixed mode, a global proxy simply isn't set, so that IP/DNS is not
proxied.

radicle-cli/examples/rad-config.md

@@ -29,7 +29,6 @@ $ rad config
     "db": {
       "journalMode": "rollback"
     },
-    "tor": null,
     "network": "main",
     "log": "INFO",
     "relay": "auto",

radicle-httpd/src/api/v1/profile.rs

@@ -90,7 +90,6 @@ mod routes {
                   "connect": [],
                   "externalAddresses": [],
                   "db": { "journalMode": "rollback" },
-                  "tor": null,
                   "network": "main",
                   "log": "INFO",
                   "relay": "auto",

radicle-node/src/service.rs

@@ -1232,7 +1232,7 @@ where
                 }
                 Entry::Vacant(e) => {
                     if let HostName::Ip(ip) = addr.host {
-                        if !ip.is_loopback() && !self.config.is_proxy_ip(ip) {
+                        if !address::is_local(&ip) {
                             if let Err(e) =
                                 self.db
                                     .addresses_mut()
@@ -2335,8 +2335,8 @@ where
                     .map(|ka| (peer.nid, ka))
             })
             .filter(|(_, ka)| match AddressType::from(&ka.addr) {
-                // Only consider Tor addresses if Tor is configured.
-                AddressType::Onion => self.config.tor.is_some(),
+                // Only consider onion addresses if configured.
+                AddressType::Onion => self.config.onion.is_some(),
                 AddressType::Dns | AddressType::Ipv4 | AddressType::Ipv6 => true,
             })
             .take(wanted)

radicle-node/src/wire/protocol.rs

@@ -21,7 +21,7 @@ use netservices::{NetConnection, NetReader, NetWriter};
 use reactor::{ResourceId, ResourceType, Timestamp};
 
 use radicle::collections::RandomMap;
-use radicle::node::config::TorConfig;
+use radicle::node::config::AddressConfig;
 use radicle::node::NodeId;
 use radicle::storage::WriteStorage;
 
@@ -1071,42 +1071,37 @@ pub fn dial<G: Signer + Ecdh<Pk = NodeId>>(
     signer: G,
     config: &service::Config,
 ) -> io::Result<WireSession<G>> {
-    let inet_addr: NetAddr<InetHost> = match config.tor {
-        // In Tor proxy mode, simply specify the proxy address for all connections,
-        // since we'll be routing all connections through the proxy.
-        Some(TorConfig::Proxy { address: proxy }) => proxy.into(),
-        // In transparent Tor mode, we treat `.onion` addresses as regular DNS names.
-        Some(TorConfig::Transparent) => {
-            let host = match &remote_addr.host {
-                HostName::Ip(ip) => InetHost::Ip(*ip),
-                HostName::Dns(dns) => InetHost::Dns(dns.clone()),
-                HostName::Tor(onion) => InetHost::Dns(onion.to_string()),
-                _ => {
-                    return Err(io::Error::new(
-                        io::ErrorKind::Unsupported,
-                        "unsupported remote address type",
-                    ))
+    let inet_addr: NetAddr<InetHost> = match &remote_addr.host {
+        HostName::Ip(ip) => NetAddr::new(InetHost::Ip(*ip), remote_addr.port),
+        HostName::Dns(dns) => NetAddr::new(InetHost::Dns(dns.clone()), remote_addr.port),
+        HostName::Tor(onion) => match config.onion {
+            // In Tor proxy mode, simply specify the proxy address.
+            Some(AddressConfig::Proxy { address }) => address.into(),
+            // In "forward" mode, if a global proxy is set, we use that, otherwise
+            // we treat `.onion` addresses as regular DNS names.
+            Some(AddressConfig::Forward) => {
+                if let Some(proxy) = config.proxy {
+                    proxy.into()
+                } else {
+                    NetAddr::new(InetHost::Dns(onion.to_string()), remote_addr.port)
                 }
-            };
-            NetAddr::new(host, remote_addr.port)
-        }
-        // Without any Tor configuration, refuse to connect to a `.onion` address.
-        None => {
-            let host = match &remote_addr.host {
-                HostName::Ip(ip) => InetHost::Ip(*ip),
-                HostName::Dns(dns) => InetHost::Dns(dns.clone()),
-                _ => {
-                    return Err(io::Error::new(
-                        io::ErrorKind::Unsupported,
-                        "unsupported remote address type",
-                    ))
-                }
-            };
-            NetAddr::new(host, remote_addr.port)
+            }
+            None => {
+                return Err(io::Error::new(
+                    io::ErrorKind::Unsupported,
+                    "no configuration found for .onion addresses",
+                ));
+            }
+        },
+        _ => {
+            return Err(io::Error::new(
+                io::ErrorKind::Unsupported,
+                "unsupported remote address type",
+            ))
         }
     };
     // Whether to tunnel regular connections through the proxy.
-    let force_proxy = matches!(config.tor, Some(TorConfig::Proxy { .. }));
+    let force_proxy = config.proxy.is_some();
     // Nb. This timeout is currently not used by the underlying library due to the
     // `socket2` library not supporting non-blocking connect with timeout.
     let connection = net::TcpStream::connect_nonblocking(inet_addr, DEFAULT_DIAL_TIMEOUT)?;

radicle/src/node/config.rs

@@ -7,7 +7,7 @@ use localtime::LocalDuration;
 
 use crate::node;
 use crate::node::policy::{Policy, Scope};
-use crate::node::{address, db, Address, Alias, NodeId};
+use crate::node::{db, Address, Alias, NodeId};
 
 /// Target number of peers to maintain connections to.
 pub const TARGET_OUTBOUND_PEERS: usize = 8;
@@ -247,17 +247,18 @@ pub enum Relay {
     Auto,
 }
 
-/// Tor configuration.
+/// Proxy configuration.
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 #[serde(rename_all = "camelCase", tag = "mode")]
-pub enum TorConfig {
-    /// Connect via SOCKS5 proxy.
+pub enum AddressConfig {
+    /// Proxy connections to this address type.
     Proxy {
-        /// Tor proxy address.
+        /// Proxy address.
         address: net::SocketAddr,
     },
-    /// Treat Tor onion addresses as DNS names.
-    Transparent,
+    /// Forward address to the next layer. Either this is the global proxy,
+    /// or the operating system, via DNS.
+    Forward,
 }
 
 /// Database configuration.
@@ -290,9 +291,12 @@ pub struct Config {
     /// Database config.
     #[serde(default)]
     pub db: DbConfig,
-    /// Tor configuration.
-    #[serde(default)]
-    pub tor: Option<TorConfig>,
+    /// Global proxy.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub proxy: Option<net::SocketAddr>,
+    /// Onion address config.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub onion: Option<AddressConfig>,
     /// Peer-to-peer network.
     #[serde(default)]
     pub network: Network,
@@ -334,7 +338,8 @@ impl Config {
             external_addresses: vec![],
             db: DbConfig::default(),
             network: Network::default(),
-            tor: None,
+            proxy: None,
+            onion: None,
             relay: Relay::default(),
             limits: Limits::default(),
             workers: DEFAULT_WORKERS,
@@ -359,15 +364,6 @@ impl Config {
         self.peer(id).is_some()
     }
 
-    /// Check if the given IP address is our proxy.
-    pub fn is_proxy_ip(&self, ip: net::IpAddr) -> bool {
-        match self.tor {
-            None => false,
-            Some(TorConfig::Proxy { address }) => address.ip() == ip,
-            Some(TorConfig::Transparent) => address::is_local(&ip),
-        }
-    }
-
     /// Are we a relay node? This determines what we do with gossip messages from other peers.
     pub fn is_relay(&self) -> bool {
         match self.relay {