Added support for SSH ports other than 22.

config.json.example

@@ -1,7 +1,15 @@
 {
+	// host and port of the SSH server that's going to act as the proxy
 	"host": "rusty.wafe.eu",
+	"port": 10022,
+	
+	// username I'm allowed to use on that server
 	"user": "tunnel",
+	
+	// a list of associations
 	"mapping": [
+		
+		// local port 22 will be available as port 39999 on the above server
 		{
 			"remote": 39999,
 			"local": 22

lib/safe-harbor.py

@@ -10,6 +10,16 @@ def load_cfg(path):
 	with open(path) as f:
 		return json.loads(jsmin.jsmin(f.read()))
 
+def safe_get(d, k, alt):
+	"""
+	Returns d[k] or alt
+	"""
+	
+	if k in d:
+		return d[k]
+	else:
+		return alt
+
 if __name__ == "__main__":
 	# try config files in the order they are passed to us
 	# first one wins
@@ -23,13 +33,12 @@ if __name__ == "__main__":
 			break
 		except Exception as e:
 			print("! cfg file %s failed to load (%s)" %(path, e))
-			
 	
 	if not cfg:
 		print("! unable to load any configuration")
 		sys.exit(1)
 	
-	command = ["/usr/bin/ssh", "-o", "ServerAliveInterval 45", "-o", "ServerAliveCountMax 2", "-o", "ExitOnForwardFailure yes", "-N"]
+	command = ["/usr/bin/ssh", "-o", "ServerAliveInterval 45", "-o", "ServerAliveCountMax 2", "-o", "ExitOnForwardFailure yes", "-N", "-p", safe_get(cfg, "port", 22)]
 	
 	for m in cfg["mapping"]:
 		command.append("-R")