From owner-freebsd-net  Thu Jun  7  4: 1:50 2001
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From: Luigi Rizzo <luigi@info.iet.unipi.it>
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Subject: Re: How to count frames transmitted through the ethernet card.
In-Reply-To: <3B1F5618.4924F64C@it.uc3m.es> from Juan Fco Rodriguez Hervella
 at "Jun 7, 2001 12:23:20 pm"
To: Juan Fco Rodriguez Hervella <jrh@it.uc3m.es>
Date: Thu, 7 Jun 2001 12:57:45 +0200 (CEST)
Cc: Lista <freebsd-net@FreeBSD.ORG>
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> Hello:
> 
> I am doing a program that sends udp packets. I have a counter
> and each time I send a packet with "sendto()", I increment the value
> of this variable.
> 
> But I would like to count the frames that are being actually
> transmitted, through the ethernet card, some like the ifconfig/netstat.

In principle sendto() can return you an ENOBUFS error when the
interface queue is full, but not always (depending on how the
firewall plays with the packet).

	cheers
	luigi

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