Re: [mpls-linux-devel] About mpls-packet to ip-packet process

[刘磊 <orp...@ms...>]

I'm sorry for my poor english.
Just like the follow instance.

< Client Router>-------| LER |--------{ MPLS NETWORK }

The packet from Client got into MPLS NETWORK, will through 'ip_rcv, ip_rcv_finish (ip_route_input ip_route_input_slow ip_mkroute_input __mkroute_input rt_set_nexthop mpls_set_nexthop mpl_set_nexthop2) ip_forward ip_forward_finish ip_output ip_finish_output ip_finish_output2 mpls_output mpls_output_shim mpls_output2 mpls_send'. Am I right?
And the packet from MPLS NETWORK to client, will through 'mpls_skb_recv mpls_input mpls_switch mpls_output2 mpls_send neighbour->output'.
If I want to the packet out from mpls_send got into ip_rcv ......, how to config it?
"mpls nhlfe add key 0 instruction pop nexthop ethX ipv4 (Client Router's IP)"? Right?

----------------------------------------
> Date: Thu, 1 May 2008 06:45:41 -0500
> From: jl...@mi...
> To: @mindspring.com
> CC: mpl...@li...
> Subject: Re: [mpls-linux-devel] About mpls-packet to ip-packet process
> 
> Just to make sure I understand what you're trying to do:
> 
> You want to get hooked into the PREROUTE netfilter chain for packets
> coming to a LER from MPLS.  To do this the normal 'pop peek' instructions
> should work just.  If you want to 'force' the trasistion from MPLS to
> IPv4 for packets coming to a LER from MPLS you can use the 'deliver'
> instruction on the associated ILM.
> 
> On Thu, May 01, 2008 at 10:44:42AM +0000, =?GB2312?B?wfXA2iA8b3JwaGVuX2xlaWxpdUBtc24uY29tPg==?= wrote:
>> 
>> I was follow the example of "IPv4 over MPLS: two LER example for mpls-linux-1.95x".
>> Do you means I have to change the "mpls nhlfe add key 0 instructions nexthop eth3 ipv4 192.168.1.4
>> (returns key 0x2)" to "mpls nhlfe add key 0 instructions deliver nexthop eth3 ipv4 192.168.1.4
>> (returns key 0x2)" ?
>> 
>> ----------------------------------------
>>> Date: Wed, 30 Apr 2008 21:16:22 -0500
>>> From: jl...@mi...
>>> To: @mindspring.com
>>> CC: mpl...@li...
>>> Subject: Re: [mpls-linux-devel] About mpls-packet to ip-packet process
>>>
>>> Hmm. I think you are looking at the PHP code. Take a look at
>>> the 'deliver' instruction. It will show you that packets destined from
>>> IPv4 may be configured to go through 'ip_rcv' which will result in
>>> the packet travesing all of the IPv4 netfilter hooks.
>>>
>>> On Wed, Apr 30, 2008 at 03:56:51AM +0000, =?GB2312?B?wfXA2iA8b3JwaGVuX2xlaWxpdUBtc24uY29tPg==?= wrote:
>>>>
>>>> Hi all:
>>>> I found that the packet which from ip stack to mpls stack in the ip_finish_output2 had passed POSTROUTING hook in netfilter.
>>>> BUT the packet from mpls stack to ip stack just use neighbour->output, which NOT hook in PREROUTING in netfilter.
>>>>
>>>> In this way, if I do SNAT for ip packet and send into mpls stack, will NOT do Un-SNAT for the reply packet.
>>>>
>>>> Is my understand right? How to solved it?
>>>> _________________________________________________________________
>>>> 用手机MSN聊天写邮件看空间，无限沟通，分享精彩！
>>>> http://mobile.msn.com.cn/
>>>>
>>>
>>>> -------------------------------------------------------------------------
>>>> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
>>>> Don't miss this year's exciting event. There's still time to save $100.
>>>> Use priority code J8TL2D2.
>>>> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
>>>> _______________________________________________
>>>> mpls-linux-devel mailing list
>>>> mpl...@li...
>>>> https://lists.sourceforge.net/lists/listinfo/mpls-linux-devel
>>>
>>>
>>> --
>>> James R. Leu
>>> jl...@mi...
>> 
>> _________________________________________________________________
>> MSN 中文网，最新时尚生活资讯，白领聚集门户。
>> http://cn.msn.com
> 
> -- 
> James R. Leu
> jl...@mi...

_________________________________________________________________
MSN 中文网，最新时尚生活资讯，白领聚集门户。
http://cn.msn.com