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[lwip-devel] [bug #19434] Processing of Fast retransmit bug
From: |
Kieran Mansley |
Subject: |
[lwip-devel] [bug #19434] Processing of Fast retransmit bug |
Date: |
Wed, 28 Mar 2007 12:18:28 +0000 |
User-agent: |
Opera/8.02 (X11; Linux i686; U; en) |
Follow-up Comment #1, bug #19434 (project lwip):
>From what you've written, I can't see the bug.
>From your example:
- Packet gets dropped
- Dup-acks are sent by "A"
- Fast retransmission at "B" kicks in and retransmits packet once
- Packet is dropped again by "A"
- More dup-acks are sent by "A"
Up until this point we are in agreement - I'm just restating your example.
Then:
- fast retransmit at "B" doesn't send the packet again, but this is not a
bug, it is not supposed to.
- eventually the "B" should run out of window space because the dup-acks
won't advance the ack number (by definition), and so it will have to stop
sending packets.
- you should then see a retransmission timeout.
As I said before, if you don't see a retransmission timeout, there is another
bug, but the fix that you've suggested is wrong and should not be used.
Can you provide an ethereal capture (tcpdump) to illustrate the problem?
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- [lwip-devel] [bug #19434] Processing of Fast retransmit bug, Oleg Tyshev, 2007/03/28
- [lwip-devel] [bug #19434] Processing of Fast retransmit bug,
Kieran Mansley <=
- [lwip-devel] [bug #19434] Processing of Fast retransmit bug, Oleg Tyshev, 2007/03/28
- [lwip-devel] [bug #19434] Processing of Fast retransmit bug, Kieran Mansley, 2007/03/28
- [lwip-devel] [bug #19434] Processing of Fast retransmit bug, Oleg Tyshev, 2007/03/28
- [lwip-devel] [bug #19434] Processing of Fast retransmit bug, Kieran Mansley, 2007/03/28
- [lwip-devel] [bug #19434] Processing of Fast retransmit bug, Oleg Tyshev, 2007/03/28
- [lwip-devel] [bug #19434] Processing of Fast retransmit bug, Kieran Mansley, 2007/03/29