Messages in this thread | | | Date | Mon, 25 Aug 2003 11:08:43 -0400 | From | Chris Friesen <> | Subject | why are error messages suppressed if IP_RECVERR is not set? |
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I'm tracking down an issue where we are sending udp packets and they are being dropped (I suspect) in the device queue.
In ip_build_xmit() we get the error code back saying that the packet was dropped, but unless IP_RECVERR is set, it seems that this error is hidden from userspace.
I notice that the man page says that sendto will never give an errno of ENOBUFS, but if you turn on IP_RECVERR this is exactly what will happen.
I guess I have two questions then: 1) why do we hide the fact that we've dropped the packet, and 2) why doesn't the man page talk about the IP_RECVERR option?
I'm using 2.4.18, if it matters.
Thanks,
Chris
-- Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com
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