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[lwip-devel] [task #14247] socket API: implement recvmsg msg_control sup


From: Simon Goldschmidt
Subject: [lwip-devel] [task #14247] socket API: implement recvmsg msg_control support
Date: Tue, 18 Apr 2017 16:00:49 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36

Follow-up Comment #12, task #14247 (project lwip):

Looks good. I can't comment on the corectness of the socket.h/.c additions
though (CMSG...) without reading into the specs. But I guess that doesn't
really matter. If it should be wrong, we can always fix it later.

I have two questions/comments though:
1) A thing that looks strange is accessing the netconn's pcb without locking.
Even if it's only a read access, chances are that the pcb already got
deallocated. If not now, this might happen in the future. Isn't it enough to
check the flag in the netbuf in this case?
2) Shouldn't the new feature work with LWIP_NETBUF_RECVINFO==1, too?

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