diff --git a/ntunnel.py b/ntunnel.py
index 25ae403..7d90644 100644
--- a/ntunnel.py
+++ b/ntunnel.py
@@ -81,6 +81,7 @@ def _makeunix(path):
 
 	return 'unix:%s' % path
 
+# Make sure any additions are reflected by tests in test_parsesockstr
 _allowedparameters = {
 	'unix': {
 		'path': str,
@@ -91,12 +92,33 @@ _allowedparameters = {
 	},
 }
 
-def _parsesockstr(sockstr):
-	'''Parse a socket string to its parts.  If there are no
-	kwargs (no = after the colon), a dictionary w/ a single
-	key of default will pass the string after the colon.
+def parsesockstr(sockstr):
+	'''Parse a socket string to its parts.
 
-	default is a reserved keyword and MUST NOT be used.'''
+	The format of sockstr is: 'proto:param=value[,param2=value2]'.
+	If the proto has a default parameter, the value can be used
+	directly, like: 'proto:value'.  This is only allowed when the
+	value can unambiguously be determined not to be a param.  If
+	there needs to be an equals '=', then you MUST use the extended
+	version.
+
+	The characters that define 'param' must be all lower case ascii
+	characters and may contain an underscore.  The first character
+	must not be an underscore.
+
+	Supported protocols:
+		unix:
+			Default parameter is path.
+			The path parameter specifies the path to the
+			unix domain socket.  The path MUST start w/ a
+			slash if it is used as a default parameter.
+
+		tcp:
+			Default parameter is host[:port].
+			The host parameter specifies the host, and the
+			port parameter specifies the port of the
+			connection.
+	'''
 
 	proto, rem = sockstr.split(':', 1)
 
@@ -126,7 +148,7 @@ def _parsesockstr(sockstr):
 async def connectsockstr(sockstr):
 	'''Wrapper for asyncio.open_*_connection.'''
 
-	proto, args = _parsesockstr(sockstr)
+	proto, args = parsesockstr(sockstr)
 
 	if proto == 'unix':
 		fun = asyncio.open_unix_connection
@@ -140,10 +162,7 @@ async def connectsockstr(sockstr):
 async def listensockstr(sockstr, cb):
 	'''Wrapper for asyncio.start_x_server.
 
-	The format of sockstr is: 'proto:param=value[,param2=value2]'.
-	If the proto has a default parameter, the value can be used
-	directly, like: 'proto:value'.  This is only allowed when the
-	value can unambiguously be determined not to be a param.
+	For the format of sockstr, please see parsesockstr.
 
 	The cb parameter is passed to asyncio's start_server or related
 	calls.  Per those docs, the cb parameter is calls or scheduled
@@ -151,19 +170,9 @@ async def listensockstr(sockstr, cb):
 	with two arguments, the reader and writer streams.  For more
 	information, see: https://docs.python.org/3/library/asyncio-stream.html#asyncio.start_server
 
-	The characters that define 'param' must be all lower case ascii
-	characters and may contain an underscore.  The first character
-	must not be an underscore.
-
-	Supported protocols:
-		unix:
-			Default parameter is path.
-			The path parameter specifies the path to the
-			unix domain socket.  The path MUST start w/ a
-			slash if it is used as a default parameter.
 	'''
 
-	proto, args = _parsesockstr(sockstr)
+	proto, args = parsesockstr(sockstr)
 
 	if proto == 'unix':
 		fun = asyncio.start_unix_server
@@ -386,7 +395,7 @@ class Tests_misc(unittest.TestCase):
 		for i in badstrs:
 			with self.assertRaises(ValueError,
 			    msg='Should have failed processing: %s' % repr(i)):
-				_parsesockstr(i)
+				parsesockstr(i)
 
 	def test_parsesockstr(self):
 		results = {
@@ -400,7 +409,7 @@ class Tests_misc(unittest.TestCase):
 		}
 
 		for s, r in results.items():
-			self.assertEqual(_parsesockstr(s), r)
+			self.assertEqual(parsesockstr(s), r)
 
 	@async_test
 	async def test_listensockstr_bad(self):