[PATCH 2/4] asyncrpc: Avoid duplicate sockets in TCP server

["Paul Barker" <pbarker@konsulko.com>]

Calling asyncio.start_server with host='localhost' results in two
sockets being opened with different port numbers (one for IPv4 and one
for IPv6):

    NOTE: Listening on ('127.0.0.1', 38833)
    NOTE: Listening on ('::1', 42029, 0, 0)

This is unnecessary and can be avoided by passing host='127.0.0.1'.

Signed-off-by: Paul Barker <pbarker@konsulko.com>
---
 lib/bb/asyncrpc/serv.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/bb/asyncrpc/serv.py b/lib/bb/asyncrpc/serv.py
index fd91aa71a..003a118b7 100644
--- a/lib/bb/asyncrpc/serv.py
+++ b/lib/bb/asyncrpc/serv.py
@@ -142,6 +142,9 @@ class AsyncServer(object):
         self.logger = logger
 
     def start_tcp_server(self, host, port):
+        if host == 'localhost':
+            host = '127.0.0.1'
+
         self.server = self.loop.run_until_complete(
             asyncio.start_server(self.handle_client, host, port, loop=self.loop)
         )
-- 
2.26.2