extmod/asyncio/stream.py: Add ipv6 support to start_server().

Detects if an ipv6 address has been passed in for host and opens an IPV6 socket instead.

Signed-off-by: Andrew Leech <[email protected]>

Author: pi-anl

extmod/asyncio/stream.py

@@ -180,11 +180,12 @@ async def start_server(cb, host, port, backlog=5, ssl=None):
     import socket
 
     # Create and bind server socket.
-    host = socket.getaddrinfo(host, port)[0]  # TODO this is blocking!
-    s = socket.socket()
+    host = socket.getaddrinfo(host, port)[0][-1]  # TODO this is blocking!
+    proto = socket.AF_INET6 if ":" in host[0] else socket.AF_INET
+    s = socket.socket(proto)
     s.setblocking(False)
     s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-    s.bind(host[-1])
+    s.bind(host)
     s.listen(backlog)
 
     # Create and return server object and task.