support connect to given port via command line

p2p/src/config.rs

@@ -1,4 +1,4 @@
-use std::net::IpAddr;
+use std::net::SocketAddr;
 use net::Config as NetConfig;
 
 #[derive(Debug)]
@@ -16,7 +16,7 @@ pub struct Config {
 	/// Configuration for every connection.
 	pub connection: NetConfig,
 	/// Connect only ot these nodes.
-	pub peers: Vec<IpAddr>,
+	pub peers: Vec<SocketAddr>,
 	/// Connect to these nodes to retrieve peer addresses, and disconnect.
 	pub seeds: Vec<String>,
 }

p2p/src/p2p.rs

@@ -323,9 +323,8 @@ impl P2P {
 		Ok(())
 	}
 
-	pub fn connect<T>(&self, ip: net::IpAddr) where T: SessionFactory {
-		let socket = net::SocketAddr::new(ip, self.config.connection.magic.port());
-		Context::connect::<T>(self.context.clone(), socket, self.config.connection.clone());
+	pub fn connect<T>(&self, addr: net::SocketAddr) where T: SessionFactory {
+		Context::connect::<T>(self.context.clone(), addr, self.config.connection.clone());
 	}
 
 	pub fn connect_to_seednode(&self, resolver: &Resolver, seednode: &str) {

pbtc/config.rs

@@ -5,7 +5,7 @@ use message::common::Magic;
 pub struct Config {
 	pub magic: Magic,
 	pub port: u16,
-	pub connect: Option<net::IpAddr>,
+	pub connect: Option<net::SocketAddr>,
 	pub seednode: Option<String>,
 	pub print_to_console: bool,
 	pub use_disk_database: bool,
@@ -26,7 +26,12 @@ pub fn parse(matches: &clap::ArgMatches) -> Result<Config, String> {
 	};
 
 	let connect = match matches.value_of("connect") {
-		Some(s) => Some(try!(s.parse().map_err(|_| "Invalid connect".to_owned()))),
+		Some(s) => Some(try!(match s.parse::<net::SocketAddr>() {
+			Err(_) => s.parse::<net::IpAddr>()
+				.map(|ip| net::SocketAddr::new(ip, magic.port()))
+				.map_err(|_| "Invalid connect".to_owned()),
+			Ok(a) => Ok(a),
+		})),
 		None => None,
 	};