[ovs-discuss] add/sub a constant value to tcp sequence number and ack number in ovs

[Seyyed Hesamoddin Ghasemi]

To achieve this, Client needs to establish a session to the controller and
when controller receives HTTP packet from the client, then decide to
redirect this session to the accurate server in a transparent manner. Am I
right?

On Sat, Sep 12, 2015 at 7:15 PM, Seyyed Hesamoddin Ghasemi <
s.hesam.ghasemi at gmail.com> wrote:

> I my case, I have a pool (cluster) of servers and I want to Implement
> Layer 7 load-balancer (content-aware load- balancer). For this, I need to
> get first 4 packet and then allocate a server in my cluster according to
> HTTP header.
>
> On Sat, Sep 12, 2015 at 7:04 PM, Gal Sagie <gal.sagie at gmail.com> wrote:
>
>> If you want a "transparent" proxy, you don't need TCP termination you can
>> just forward the packet.
>> For your question, you can have a match all send to controller flow (lets
>> say with priority 100), then when you decide you don't need
>> the traffic to go to the controller you can install a flow with higher
>> priority for that session. (with forward actions)
>> (in the mean time your controller can just forward the packets to the
>> destination after it inspected them or did what ever it is
>> you want to do)
>>
>> Another thing you can leverage is that OVS in master branch now has an
>> integration with conntrack.
>> You might be able to use it (
>> http://openvswitch.org/support/ovscon2014/17/1030-conntrack_nat.pdf)
>>
>> What are you trying to do that require TCP termination?
>>
>>
>>
>>
>>
>> On Sat, Sep 12, 2015 at 4:21 PM, Seyyed Hesamoddin Ghasemi <
>> s.hesam.ghasemi at gmail.com> wrote:
>>
>>> Why not? As I know OVS have access to all header fields in layer 2 to
>>> layer 4!
>>> How can I Implement a simple proxy using OVS? I mean, how can get packet
>>> from a source node and send it to a destination node in a transparent
>>> manner?
>>>
>>> I need to get first 4 packet of a tcp session in the controller (as a
>>> proxy) and then forward the rest of packets using OVS without intervention
>>> of the controller and with keep current tcp session. How can I do that?
>>>
>>>
>>> On Sat, Sep 5, 2015 at 10:19 PM, Justin Pettit <jpettit at nicira.com>
>>> wrote:
>>>
>>>>
>>>> > On Sep 5, 2015, at 8:53 AM, Seyyed Hesamoddin Ghasemi <
>>>> s.hesam.ghasemi at gmail.com> wrote:
>>>> >
>>>> > Hi every body,
>>>> > I need to develop a proxy, and for this I should add/sub a constant
>>>> value to sequence number and ack number in ovs, Could somebody please help
>>>> me?
>>>>
>>>> OVS doesn't provide any visibility into the sequence numbers of TCP
>>>> packets.
>>>>
>>>> --Justin
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Seyyed Hesamoddin Ghasemi
>>>
>>> _______________________________________________
>>> discuss mailing list
>>> discuss at openvswitch.org
>>> http://openvswitch.org/mailman/listinfo/discuss
>>>
>>>
>>
>>
>> --
>> Best Regards ,
>>
>> The G.
>>
>
>
>
> --
> Seyyed Hesamoddin Ghasemi
>



-- 
Seyyed Hesamoddin Ghasemi
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