- 18 Jun, 2006 40 commits
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Stephen Hemminger authored
Implementation of RFC3742 limited slow start. Added as part of the TCP highspeed congestion control module. Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Stephen Hemminger authored
This adds a new module for tracking TCP state variables non-intrusively using kprobes. It has a simple /proc interface that outputs one line for each packet received. A sample usage is to collect congestion window and ssthresh over time graphs. Signed-off-by:
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Stephen Hemminger authored
Many of the TCP congestion methods all just use ssthresh as the minimum congestion window on decrease. Rather than duplicating the code, just have that be the default if that handle in the ops structure is not set. Minor behaviour change to TCP compound. It probably wants to use this (ssthresh) as lower bound, rather than ssthresh/2 because the latter causes undershoot on loss. Signed-off-by:
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Stephen Hemminger authored
The original code did a 64 bit divide directly, which won't work on 32 bit platforms. Rather than doing a 64 bit square root twice, just implement a 4th root function in one pass using Newton's method. Signed-off-by:
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Angelo P. Castellani authored
TCP Compound is a sender-side only change to TCP that uses a mixed Reno/Vegas approach to calculate the cwnd. For further details look here: ftp://ftp.research.microsoft.com/pub/tr/TR-2005-86.pdfSigned-off-by:
Angelo P. Castellani <angelo.castellani@gmail.com> Signed-off-by:
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Bin Zhou authored
TCP Veno module is a new congestion control module to improve TCP performance over wireless networks. The key innovation in TCP Veno is the enhancement of TCP Reno/Sack congestion control algorithm by using the estimated state of a connection based on TCP Vegas. This scheme significantly reduces "blind" reduction of TCP window regardless of the cause of packet loss. This work is based on the research paper "TCP Veno: TCP Enhancement for Transmission over Wireless Access Networks." C. P. Fu, S. C. Liew, IEEE Journal on Selected Areas in Communication, Feb. 2003. Original paper and many latest research works on veno: http://www.ntu.edu.sg/home/ascpfu/veno/veno.htmlSigned-off-by:
Bin Zhou <zhou0022@ntu.edu.sg> Cheng Peng Fu <ascpfu@ntu.edu.sg> Signed-off-by:
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Wong Hoi Sing Edison authored
TCP Low Priority is a distributed algorithm whose goal is to utilize only the excess network bandwidth as compared to the ``fair share`` of bandwidth as targeted by TCP. Available from: http://www.ece.rice.edu/~akuzma/Doc/akuzma/TCP-LP.pdf Original Author: Aleksandar Kuzmanovic <akuzma@northwestern.edu> See http://www-ece.rice.edu/networks/TCP-LP/ for their implementation. As of 2.6.13, Linux supports pluggable congestion control algorithms. Due to the limitation of the API, we take the following changes from the original TCP-LP implementation: o We use newReno in most core CA handling. Only add some checking within cong_avoid. o Error correcting in remote HZ, therefore remote HZ will be keeped on checking and updating. o Handling calculation of One-Way-Delay (OWD) within rtt_sample, sicne OWD have a similar meaning as RTT. Also correct the buggy formular. o Handle reaction for Early Congestion Indication (ECI) within pkts_acked, as mentioned within pseudo code. o OWD is handled in relative format, where local time stamp will in tcp_time_stamp format. Port from 2.4.19 to 2.6.16 as module by: Wong Hoi Sing Edison <hswong3i@gmail.com> Hung Hing Lun <hlhung3i@gmail.com> Signed-off-by:
Wong Hoi Sing Edison <hswong3i@gmail.com> Signed-off-by:
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Andrew Morton authored
Oops fix from Stephen: remove duplicate rcv() calls. Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Alexey Dobriyan authored
GRE keys are 16-bit wide. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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Patrick McHardy authored
Add SIP connection tracking helper. Originally written by Christian Hentschel <chentschel@arnet.com.ar>, some cleanup, minor fixes and bidirectional SIP support added by myself. Signed-off-by:
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Patrick McHardy authored
Call Forwarding doesn't need to create an expectation if both peers can reach each other without our help. The internal_net_addr parameter lets the user explicitly specify a single network where this is true, but is not very flexible and even fails in the common case that calls will both be forwarded to outside parties and inside parties. Use an optional heuristic based on routing instead, the assumption is that if bpth the outgoing device and the gateway are equal, both peers can reach each other directly. Signed-off-by:
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Jing Min Zhao authored
Signed-off-by:
Jing Min Zhao <zhaojingmin@users.sourceforge.net> Signed-off-by:
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Patrick McHardy authored
When a port number within a packet is replaced by a differently sized number only the packet is resized, but not the copy of the data. Following port numbers are rewritten based on their offsets within the copy, leading to packet corruption. Convert the amanda helper to the textsearch infrastructure to avoid the copy entirely. Signed-off-by:
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Patrick McHardy authored
Instead of skipping search entries for the wrong direction simply index them by direction. Based on patch by Pablo Neira <pablo@netfilter.org> Signed-off-by:
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Patrick McHardy authored
debug is the debug level, not a bool. Signed-off-by:
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Patrick McHardy authored
Instead of using the ID to find out where to continue dumping, take a reference to the last entry dumped and try to continue there. Signed-off-by:
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Patrick McHardy authored
The current configuration only allows to configure one manip and overloads conntrack status flags with netlink semantic. Signed-off-by:
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Eric Leblond authored
Add a flag in a connection status to have a non updated timeout. This permits to have connection that automatically die at a given time. Signed-off-by:
Eric Leblond <eric@inl.fr> Signed-off-by:
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Patrick McHardy authored
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Patrick McHardy authored
None of the existing helpers expects to get called for related ICMP packets and some even drop them if they can't parse them. Signed-off-by:
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Patrick McHardy authored
Replace the unmaintainable ipt_recent match by a rewritten version that should be fully compatible. Signed-off-by:
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Patrick McHardy authored
Add statistic match which is a combination of the nth and random matches. Signed-off-by:
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Patrick McHardy authored
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Patrick McHardy authored
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Patrick McHardy authored
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Herbert Xu authored
The size of the type_map array (256) comes from the number of IP protocols, i.e., IPPROTO_MAX. This patch is based on a suggestion from Ingo Oeser. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Herbert Xu authored
Now that we have xfrm_mode objects we can move the transport mode specific input decapsulation code into xfrm_mode_transport. This removes duplicate code as well as unnecessary header movement in case of tunnel mode SAs since we will discard the original IP header immediately. This also fixes a minor bug for transport-mode ESP where the IP payload length is set to the correct value minus the header length (with extension headers for IPv6). Of course the other neat thing is that we no longer have to allocate temporary buffers to hold the IP headers for ESP and IPComp. Signed-off-by:
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Herbert Xu authored
This patch adds the structure xfrm_mode. It is meant to represent the operations carried out by transport/tunnel modes. By doing this we allow additional encapsulation modes to be added without clogging up the xfrm_input/xfrm_output paths. Candidate modes include 4-to-6 tunnel mode, 6-to-4 tunnel mode, and BEET modes. Signed-off-by:
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Herbert Xu authored
The number of locks used to manage afinfo structures can easily be reduced down to one each for policy and state respectively. This is based on the observation that the write locks are only held by module insertion/removal which are very rare events so there is no need to further differentiate between the insertion of modules like ipv6 versus esp6. The removal of the read locks in xfrm4_policy.c/xfrm6_policy.c might look suspicious at first. However, after you realise that nobody ever takes the corresponding write lock you'll feel better :) As far as I can gather it's an attempt to guard against the removal of the corresponding modules. Since neither module can be unloaded at all we can leave it to whoever fixes up IPv6 unloading :) Signed-off-by:
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Michael Chan authored
Update version to 3.60. Signed-off-by:
Michael Chan <mchan@broadcom.com> Signed-off-by:
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Michael Chan authored
Add recovery logic when we suspect that the system is re-ordering MMIOs. Re-ordered MMIOs to the send mailbox can cause bogus tx completions and hit BUG_ON() in the tx completion path. tg3 already has logic to handle re-ordered MMIOs by flushing the MMIOs that must be strictly ordered (such as the send mailbox). Determining when to enable the flush is currently a manual process of adding known chipsets to a list. The new code replaces the BUG_ON() in the tx completion path with the call to tg3_tx_recover(). It will set the TG3_FLAG_MBOX_WRITE_REORDER flag and reset the chip later in the workqueue to recover and start flushing MMIOs to the mailbox. A message to report the problem will be printed. We will then decide whether or not to add the host bridge to the list of chipsets that do re-ordering. We may add some additional code later to print the host bridge's ID so that the user can report it more easily. The assumption that re-ordering can only happen on x86 systems is also removed. Signed-off-by:
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Michael Chan authored
Add PCI ID for BCM5786 which is a variant of 5787. Signed-off-by:
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Samuel Ortiz authored
This patch gets rid of the old power management code and now uses the device model for the ali-ircc driver. Signed-off-by:
Samuel Ortiz <samuel@sortiz.org> Signed-off-by:
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Christoph Hellwig authored
stir4200 uses a kernel thread for its TX/RX operations, and it is now converted to the kernel kthread API. Tested on an STIR4200 based dongle. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Samuel Ortiz authored
The MosChip MCS7780 chipset is an IrDA USB bridge that doesn't conform with the IrDA-USB standard and thus needs its separate driver. Tested on an actual MCS7780 based dongle. Original implementation by Brian Pugh <bpugh@cs.pdx.edu> Signed-off-by:
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David S. Miller authored
We only want to take receive RTT mesaurements for data bearing frames, here in the header prediction fast path for a pure-sender, we know that we have a pure-ACK and thus the checks in tcp_rcv_rtt_mesaure_ts() will not pass. Signed-off-by: -
Stephen Hemminger authored
Add basic netlink support to the Ethernet bridge. Including: * dump interfaces in bridges * monitor link status changes * change state of bridge port For some demo programs see: http://developer.osdl.org/shemminger/prototypes/brnl.tar.gz These are to allow building a daemon that does alternative implementations of Spanning Tree Protocol. Signed-off-by:
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Stephen Hemminger authored
Return address in use, if some other kernel code has the SAP. Propogate out error codes from netfilter registration and unwind. Signed-off-by:
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Stephen Hemminger authored
Small optimizations of bridge forwarding path. Signed-off-by:
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Stephen Hemminger authored
Allow mulitcast reception of datagrams (similar to UDP). All sockets bound to the same SAP receive a clone. Signed-off-by:
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