[issue32331] apply SOCK_TYPE_MASK to socket.type on Linux

[Yury Selivanov]

Yury Selivanov <yselivanov at gmail.com> added the comment:

> You can easily work around your problem by replacing "sock.type == SOCK_STREAM" with "sock.type & SOCK_STREAM == SOCK_STREAM".

Heh :) No, that would be a buggy code.  Try this on your Linux box:

    (socket.SOCK_SEQPACKET & socket.SOCK_STREAM) == socket.SOCK_STREAM

The _only_ way of checking socket type reliably is to explicitly reset SOCK_NONBLOCK and SOCK_CLOEXEC or to apply 0xF mask on Linux, and don't do that on other platforms.

That's why I think it's important to fix this one way or another.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32331>
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