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Re: [lwip-users] Data passed to UDP receive callback

From: address@hidden
Subject: Re: [lwip-users] Data passed to UDP receive callback
Date: Mon, 10 Aug 2009 20:01:58 +0200
User-agent: Thunderbird (Macintosh/20090605)

Ben Hastings wrote:
On a side note, what happens if the pbuf is freed before the end of the
callback?  Does that also free the memory that the address pointer
points to?

That's a good point. Since p->ref is (almost always) == 1 at the point where the pbuf is passed to the receive callback, it will get freed when pbuf_free(p) is called. I'd still vote for copying the address before calling the receive callback function. It might be a *little* less performant, but safer.


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