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Altera_Forum's avatar
Altera_Forum
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16 years ago

How to unlock send function if ethernet link down

I send some data by TCP use nichestack. When the ethernet link down , the send function block forever, so all the task is dead. How to resolve this problem? The code is like this bytes...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I think that normally send() would return if the link goes down. At least this is what happens in my system; but maybe the behaviour is related to the mac-phy you are using.

Alternatively you can configure the socket in non blocking mode. In this way send() always returns and then you can test the link and decide if you want call send() again or reset the connection.