Re: Re[4]: How to parse custom PROXY protocol v2 header for custom routing in HAProxy configuration?

[Cyril Bonté]

Hi,

- Mail original -
> De: "Aleksandar Lazic" 
> À: haproxy@formilux.org
> Envoyé: Lundi 22 Janvier 2018 13:34:33
> Objet: Re[4]: How to parse custom PROXY protocol v2 header for custom routing 
> in HAProxy configuration?
> 
> Hi.
> 
> Have anyone a Idea how haproxy can handle the custom TLV in the proxy
> protocol v2

Currently, it can't. Only PP2_TYPE_NETNS is supported.
But some work can be done to, at least, support some other predefined fields, 
or even better, to provide a generic way to capture any type of field.

You can have a look at the function conn_recv_proxy() in src/connection.c :
http://git.haproxy.org/?p=haproxy.git;a=blob;f=src/connection.c;h=0f8acb02dbdbc0a70cdd99830f8a0c9256f731e8;hb=HEAD#l604

Cyril

Re[4]: How to parse custom PROXY protocol v2 header for custom routing in HAProxy configuration?

[Aleksandar Lazic]

Hi.

Have anyone a Idea how haproxy can handle the custom TLV in the proxy 
protocol v2


Best regards
Aleks
-- Originalnachricht --
Von: "Aleksandar Lazic" 
An: haproxy@formilux.org
Gesendet: 17.01.2018 20:49:58
Betreff: Re[3]: How to parse custom PROXY protocol v2 header for custom 
routing in HAProxy configuration?



Hi.

Any one any hints?

Regards
aleks

-- Originalnachricht --
Von: "Aleksandar Lazic" 
An: "Adam Sherwood" ; haproxy@formilux.org
Gesendet: 15.01.2018 16:52:15
Betreff: Re[2]: How to parse custom PROXY protocol v2 header for custom 
routing in HAProxy configuration?



Hi.

Follow up question to proxy protocol

Is it possible to handle the Type-Length-Value (TLV)  fields in from 
pp2 in haproxy config or in lua?


I refer to
2.2.7. Reserved type ranges
https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt

from the question on so 
https://stackoverflow.com/questions/48195311/how-to-parse-custom-proxy-protocol-v2-header-for-custom-routing-in-haproxy-confi


Regards
aleks

-- Originalnachricht --
Von: "Aleksandar Lazic" 
An: "Adam Sherwood" ; haproxy@formilux.org
Gesendet: 11.01.2018 12:24:46
Betreff: Re: How to parse custom PROXY protocol v2 header for custom 
routing in HAProxy configuration?



Hi.

-- Originalnachricht --
Von: "Adam Sherwood" 
An: haproxy@formilux.org
Gesendet: 10.01.2018 23:40:25
Betreff: How to parse custom PROXY protocol v2 header for custom 
routing in HAProxy configuration?


I have written this up as a StackOverflow question here: 
https://stackoverflow.com/q/48195311/2081835.


When adding PROXY v2 with AWS VPC PrivateLink connected to a Network 
Load Balancer, the endpoint ID of the connecting account is added as 
a TLV. I need to use this for routing frontend to backend, but I 
cannot sort out how.


Is there a way to call a custom matcher that could do the parsing 
logic, or is this already built-in and I'm just not finding the 
documentation?


Any ideas on the topic would be super helpful. Thank you.
Looks like AWS use the "2.2.7. Reserved type ranges" as described in 
https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt therefore 
you will need to parse this part by your own.


This could be possible in lua, maybe I'm not an expert in lua, yet 
;-)


There are javexamples in the doc link ( 
https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html#proxy-protocol 
) which you have added int the stackoverflow request.


Regards
Aleks