netdev - Re: Specific question about packet dropping

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Date:	Wed, 28 Nov 2012 19:45:29 +0800
From:	Shan Wei <shanwei88@...il.com>
To:	Javier Domingo <javierdo1@...il.com>
CC:	netdev@...r.kernel.org
Subject: Re: Specific question about packet dropping

Javier Domingo said, at 2012/11/28 18:40:
> Hi,
> 
> Where are packets dropped?
> 
> I reading code I think just found:
> - In the NIC
> - In the netif_receive_skb
> 
> Is there any other place I can have missed?

There is many reasons, following is not whole.

For receiver:
1. NIC
2. __netif_receive_skb(unknown packet type)
3. ip_rcv(abnormal packet, route reason...)
4. tcp/udp (unknown port, receive buff limit..)

For Sender:
1. tcp/udp(send buffer limit)
2. ip(route reason....)
3. arp(resolved_discards)
4. qdisc(queue limit)


Best Regards
Shan Wei

> 
> Javier Domingo
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