Messages in this thread | | | Subject | Re: apropos recvfrom | From | Andi Kleen <> | Date | 16 Oct 1998 16:12:57 +0200 |
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In article <Pine.LNX.3.96.981015214337.6013A-100000@apemaia.roma1.infn.it>, Davide Rossetti <rossetti@apemaia.roma1.infn.it> writes: > hi all, > On Linux 2.1.125 (not sure, but also on 2.0.35) > I beg your pardon for my silliness. Now I got a strange result. > 1) client side: > sendmsg() with > msg_iov = array of 3 iovec > msg_iovlen= 3 > it returns 3 !!!
> 2) server side: > recvmsg() with > msg_iov = array of 2 iovec > msg_iovlen = 2 > it returns 3 !!! (msg_flags==0)
> browsing http://www.opengroup.org/onlinepubs/7908799/xns/recvmsg.html, > it seems that both functions should return the total recvd/sent bytes. > Am I wrong ? > In case I am, how can I get the exact fill status of my recvd iovecs, > that is, how many bytes got received ?
You do. The result means that the datagram only carried 3 bytes of payload. How you map that to your iovs is a user space problem.
-Andi
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