[TCP]: Also handle snd_una changes in tcp_cwnd_down

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tcp_cwnd_down must check for it too as it should be conservative
in case of collapse stuff and also when receiver is trying to
lie (though that wouldn't be very successful/useful anyway).

Note:
- Separated also is_dupack and do_lost in fast_retransalert
	* Much cleaner look-and-feel now
	* This time it really fixes cumulative ACK with many new
	  SACK blocks recovery entry (I claimed this fixes with
	  last patch but it wasn't). TCP will now call
	  tcp_update_scoreboard regardless of is_dupack when
	  in recovery as long as there is enough fackets_out.
- Introduce FLAG_SND_UNA_ADVANCED
	* Some prior_snd_una arguments are unnecessary after it
- Added helper FLAG_ANY_PROGRESS to avoid long FLAG...|FLAG...
  constructs

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Ilpo Järvinen 2007-08-02 19:46:58 -07:00 • committed by David S. Miller

parent 3a97aeb5c1

commit 2e6052941a

1 changed files with 18 additions and 16 deletions

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34

net/ipv4/tcp_input.c

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