tcpdump mailing list archives
Re: twice past the taps, thence out to net?
From: Eric Dumazet <eric.dumazet () gmail com>
Date: Thu, 15 Dec 2011 19:54:37 +0100
Le jeudi 15 décembre 2011 à 10:32 -0800, Rick Jones a écrit :
More exactly, we call dev_queue_xmit_nit() from dev_hard_start_xmit() _before_ giving skb to device driver. If device driver returns NETDEV_TX_BUSY, and a qdisc was setup on the device, packet is requeued. Later, when queue is allowed to send again packets, packet is retransmitted (and traced a second time in dev_queue_xmit_nit())Is this then an unintended consequence bug, or a known feature?
Its a well known feature, some people attempted to remove it ;) http://answers.softpicks.net/answers/topic/-PATCH-tcpdump-may-trace-some-outbound-packets-twice--2204640-1.htm - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- twice past the taps, thence out to net? Rick Jones (Dec 14)
- Re: twice past the taps, thence out to net? Benjamin Poirier (Dec 14)
- Re: twice past the taps, thence out to net? Vijay Subramanian (Dec 14)
- Re: twice past the taps, thence out to net? Eric Dumazet (Dec 15)
- Re: twice past the taps, thence out to net? Rick Jones (Dec 15)
- Re: twice past the taps, thence out to net? Eric Dumazet (Dec 15)
- Re: twice past the taps, thence out to net? Stephen Hemminger (Dec 15)
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- Re: twice past the taps, thence out to net? Rick Jones (Dec 15)
- Re: twice past the taps, thence out to net? Eric Dumazet (Dec 15)
- Re: twice past the taps, thence out to net? Jesse Brandeburg (Dec 16)
- Re: twice past the taps, thence out to net? Eric Dumazet (Dec 16)
- Re: twice past the taps, thence out to net? Rick Jones (Dec 16)
- Re: twice past the taps, thence out to net? Eric Dumazet (Dec 16)
- Re: twice past the taps, thence out to net? Wyborny, Carolyn (Dec 20)
- Re: twice past the taps, thence out to net? Eric Dumazet (Dec 15)
- Re: twice past the taps, thence out to net? Guy Harris (Dec 15)