[New-bugs-announce] [issue25230] Unix datagram sockets not supported

[rb]

New submission from rb:

AF_UNIX, SOCK_DGRAM sockets are valid, but asyncio doesn't appear to support them.

I've tried combinations of create_connection, create_datagram_endpoint and create_unix_connection, creating a socket myself and passing in sock, and equivalent methods at the server end. There seem to be implicit assumptions about addresses being 2-tuples (instead of strings) and transports being hardcoded to be constructed as either stream or datagram transports. create_unix_connection makes the assumption that it will be a stream, and create_datagram_endpoint that it will be AF_INET or AF_INET6 with (host, port) addressing.

I used 3.4.3, but looking at the docs it doesn't look like this was addressed in 3.5 either.

I'd like this because message boundaries are preserved (unlike in SOCK_STREAM), which if it Just Worked would make local system IPC (eg. with JSON-RPC) extremely trivial to implement in asyncio.

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components: asyncio
messages: 251549
nosy: gvanrossum, haypo, rb, yselivanov
priority: normal
severity: normal
status: open
title: Unix datagram sockets not supported
type: enhancement
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25230>
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