Feat: Log client IP during REST and Electrum requests

Cargo.toml

@@ -35,8 +35,10 @@ libc = "0.2.81"
 log = "0.4.11"
 socket2 = { version = "0.4", features = ["all"] }
 num_cpus = "1.12.0"
+memchr = "2.4.1"
 page_size = "0.4.2"
 prometheus = "0.13"
+proxy-protocol = { version = "0.5", features = ["always_exhaustive"] }
 rayon = "1.5.0"
 rocksdb = "0.21.0"
 serde = "1.0.118"

src/bin/electrs.rs

@@ -106,6 +106,15 @@ fn run_server(config: Arc<Config>) -> Result<()> {
         );
     }
 
+    if std::env::var("ELECTRS_PERIODIC_THREAD_LOGGER").is_ok() {
+        electrs::util::spawn_thread("periodic_thread_logger", || loop {
+            electrs::util::with_spawned_threads(|threads| {
+                debug!("THREADS: {:?}", threads);
+            });
+            std::thread::sleep(std::time::Duration::from_millis(5000));
+        });
+    }
+
     loop {
         if let Err(err) = signal.wait(Duration::from_millis(500), true) {
             info!("stopping server: {}", err);

src/config.rs

@@ -39,6 +39,8 @@ pub struct Config {
     pub daemon_rpc_addr: SocketAddr,
     pub cookie: Option<String>,
     pub electrum_rpc_addr: SocketAddr,
+    pub electrum_proxy_depth: usize,
+    pub rest_proxy_depth: usize,
     pub http_addr: SocketAddr,
     pub http_socket_file: Option<PathBuf>,
     pub rpc_socket_file: Option<PathBuf>,
@@ -139,6 +141,23 @@ impl Config {
                     .help("Electrum server JSONRPC 'addr:port' to listen on (default: '127.0.0.1:50001' for mainnet, '127.0.0.1:60001' for testnet and '127.0.0.1:60401' for regtest)")
                     .takes_value(true),
             )
+            .arg(
+                Arg::with_name("electrum_proxy_depth")
+                    .long("electrum-proxy-depth")
+                    .help("Electrum server's PROXY protocol header depth. \
+                        ie. a value of 2 means the 2nd closest hop's PROXY header \
+                        will be used to find the source IP. A value of 0 means all \
+                        IPs are ignored. (default: 0)")
+                    .takes_value(true),
+            )
+            .arg(
+                Arg::with_name("rest_proxy_depth")
+                    .long("rest-proxy-depth")
+                    .help("REST server's X-Forwarded-For IP address depth. \
+                        ie. a value of 2 means the 2nd IP address in the header(s) is used. \
+                        (default: 0)")
+                    .takes_value(true),
+            )
             .arg(
                 Arg::with_name("http_addr")
                     .long("http-addr")
@@ -393,6 +412,16 @@ impl Config {
                 .unwrap_or(&format!("127.0.0.1:{}", default_electrum_port)),
             "Electrum RPC",
         );
+        let electrum_proxy_depth = m
+            .value_of("electrum_proxy_depth")
+            .unwrap_or("0")
+            .parse::<usize>()
+            .expect("invalid electrum_proxy_depth");
+        let rest_proxy_depth = m
+            .value_of("rest_proxy_depth")
+            .unwrap_or("0")
+            .parse::<usize>()
+            .expect("invalid rest_proxy_depth");
         let http_addr: SocketAddr = str_to_socketaddr(
             m.value_of("http_addr")
                 .unwrap_or(&format!("127.0.0.1:{}", default_http_port)),
@@ -465,6 +494,8 @@ impl Config {
             cookie,
             utxos_limit: value_t_or_exit!(m, "utxos_limit", usize),
             electrum_rpc_addr,
+            electrum_proxy_depth,
+            rest_proxy_depth,
             electrum_txs_limit: value_t_or_exit!(m, "electrum_txs_limit", usize),
             electrum_banner,
             http_addr,