[issue21819] Remaining buffer from socket isn't available anymore after calling socket.recv the first time

[Charles-François Natali]

Charles-François Natali added the comment:

> I'm wondering how would it be possible then to fetch packets of an unknown size without using an extremely big buffer.

IP packets are limited to 64K, so just pass a 64K buffer, that's not
"extremely big".
If you really wanted to avoid this, you could try the FIONREAD ioctl,
but I wouldn't advise it.

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<http://bugs.python.org/issue21819>
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