From a4d30ec5255a188ad9c359c52fd74d8091721e62 Mon Sep 17 00:00:00 2001
From: bnewbold <bnewbold@robocracy.org>
Date: Fri, 3 Jun 2016 00:27:37 -0400
Subject: implement hack which re-binds after daemonization (UGLY)

---
 src/client.rs |  4 +++-
 src/server.rs | 25 ++++++++++++++++---------
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/src/client.rs b/src/client.rs
index b7da71e..7e494a2 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -73,11 +73,13 @@ pub fn run_client(host: &str, local_file: &str, remote_file: &str, remote_is_dir
 
     let addr = net::IpAddr::from_str(remote_host).unwrap();
     let mut socket = UdtSocket::new(udt::SocketFamily::AFInet, udt::SocketType::Stream).unwrap();
+    println!("Connecting to: {}:{}", addr, remote_port);
     match socket.connect(net::SocketAddr::new(addr, remote_port)) {
         Ok(_) =>  { println!("Connected."); },
         Err(e) => { return Err(e.err_msg); },
     };
     let mut stream: UdtStream = UdtStream::new(socket);
+    println!("opened socket");
 
     let io_result: io::Result<()>;
     if !no_crypto {
@@ -164,9 +166,9 @@ pub fn main_client() {
     let remote_port = matches.opt_str("port").unwrap().parse::<u16>().unwrap();
     let addr = net::IpAddr::from_str(&remote_host).unwrap();
     let mut socket = UdtSocket::new(udt::SocketFamily::AFInet, udt::SocketType::Stream).unwrap();
+    println!("Connecting to: {}:{}", addr, remote_port);
     socket.connect(net::SocketAddr::new(addr, remote_port)).unwrap();;
     let mut stream: UdtStream = UdtStream::new(socket);
-    println!("opened socket");
 
     let mut ret: io::Result<()>;
     if !no_crypto {
diff --git a/src/server.rs b/src/server.rs
index cedcf8c..ca75664 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -57,6 +57,9 @@ fn run_server(path: &str, is_recv: bool, recursive: bool, daemonize: bool, no_cr
 
     let listener = UdtSocket::new(udt::SocketFamily::AFInet, udt::SocketType::Stream).unwrap();
 
+    // Big hack going on here: need to find an open port, then increment by one and rebind below.
+    // This need seems to be driven by the daemonization process, but only with the libudt library
+    // (not the old UTP stuff)?
     for port in 61000..62000 {
         match listener.bind(net::SocketAddr::new(all_addr, port)) {
             Ok(_) => { break; },
@@ -74,10 +77,11 @@ fn run_server(path: &str, is_recv: bool, recursive: bool, daemonize: bool, no_cr
         return Err("Couldn't bind to *any* valid port".to_string());
     }
 
-    listener.listen(1).unwrap();
-
     let listen_port = listener.getsockname().unwrap().port();
 
+    // This is the hack; we'll rebind below
+    let listen_port = listen_port + 1;
+
     let secret_key = secretbox::gen_key();
     let read_nonce = secretbox::gen_nonce();
     let write_nonce = secretbox::gen_nonce();
@@ -89,8 +93,6 @@ fn run_server(path: &str, is_recv: bool, recursive: bool, daemonize: bool, no_cr
     let write_nonce = secretbox::Nonce::from_slice(&[0; secretbox::NONCEBYTES]).unwrap();
     */
 
-    info!("listening on {}:{}", listen_addr, listen_port);
-
     // Send back (via SSH stdout) details so client can connect
     println!("UCP CONNECT {} {} {} {} {}",
         listen_addr,
@@ -99,7 +101,6 @@ fn run_server(path: &str, is_recv: bool, recursive: bool, daemonize: bool, no_cr
         nonce2string(&read_nonce),
         nonce2string(&write_nonce));
 
-
     // TODO: maybe wait for an ACK of some sort here before daemonizing?
 
     if daemonize {
@@ -109,18 +110,24 @@ fn run_server(path: &str, is_recv: bool, recursive: bool, daemonize: bool, no_cr
             Some(path) => path,
             None => env::current_dir().unwrap(),
         };
-        // XXX: should maybe use log/syslog from here on?
         let daemonizer = daemonize::Daemonize::new().working_directory(working_dir);
 
         match daemonizer.start() {
-            Ok(_) => println!("Success, daemonized"),
-            Err(e) => println!("{}", e),
+            Ok(_) => info!("daemonized"),
+            Err(e) => { return Err(format!("Failed to daemonize: {:?}", e)); },
         }
     } else {
         info!("Not daemonizing (DEBUG MODE)");
     }
+
+    listener.close().unwrap();
+    let listener = UdtSocket::new(udt::SocketFamily::AFInet, udt::SocketType::Stream).unwrap();
+    listener.bind(net::SocketAddr::new(all_addr, listen_port)).unwrap();
+    listener.listen(1).unwrap();
+
+    info!("waiting for connection on {}:{}", listen_addr, listen_port);
     let (mut socket, _src) = listener.accept().unwrap();
-    info!("Got connection from {}", socket.getpeername().unwrap());
+    info!("got connection from {}", socket.getpeername().unwrap());
     let mut stream: UdtStream = UdtStream::new(socket);
 
     let io_result: io::Result<()>;
-- 
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