MQX Software SolutionsのトピックRe: Reply on same interface as incoming?

Reply on same interface as incoming?

chris-quin — Mon, 24 Jun 2013 10:19:12 GMT

I have a system with two interfaces. Both interfaces are connected to the internet.

One of them is set as the default route. A side effect of this is that if a packet comes in on the non-default-route interface,

the reply is sent back through the default route interface. But i want to send it back to the incomming interface.

My Problem is, one of these interfaces is behind a router in a subnet and the router ist forwarding incomming packages to this interface.

Now, i will answer to the the same interface, but RTCS can't reach/find the incomming ip-adress and try to send it back to the defaultgateway(other interface).

Is it possible to create for each interface an extra routingtable(ipradix) or is there an simpler way to realise this problem?

I hope somebody can help me.

Re: Reply on same interface as incoming?

Martin_ — Fri, 19 Jul 2013 11:42:35 GMT

As soon as RTCS IPv4 sends a packet to a different subnet, it goes via gateway. RTCS IPv6 allows to select the interface, but not RTCS IPv4, as far as I am aware.

Re: Reply on same interface as incoming?

chris-quin — Fri, 19 Jul 2013 11:55:32 GMT

Hi Martin,

thanks for your reply.

Now i am able to send IPv4 packages.

I edited MQX, so now i am able to root over Interface. Everything works fine.

If somebody need a solution, i can post the modified code.

greetings chris

Re: Reply on same interface as incoming?

Ramtry — Fri, 19 Jul 2013 11:59:13 GMT

Hi Christian,

I have the same type of application. But i am using QT creator for handling the network related packet. Two ethernet port say eth0 and eth1 both are connected to router and port forwarding is done in eth0. Client connection and packet handling are done in QT with asyn server-client prgramming.

thanks

ram

Re: Reply on same interface as incoming?

Ramtry — Fri, 19 Jul 2013 12:00:40 GMT

Hi christian,

Hope you solved the problem. Congratz... well done.

thanks

ram

Re: Reply on same interface as incoming?

chris-quin — Fri, 19 Jul 2013 12:09:56 GMT

Hi Ram Ramasamy,

i solve/fixed the problem for me. I increased a little bit mqx.

if a new interface is added, i additional register which gateway was used and added this and the interface together. If a TCP/IP message receive and i will send a package, i am looking for the interface with the corresponding gateway and register this to the hop-destination.

greeting chris

Re: Reply on same interface as incoming?

Martin_ — Fri, 19 Jul 2013 12:11:32 GMT

Hi Christian, I think it would be great if you post your modifications to MQX, to get this working. There have been more users asking for this kind of functionality on this forum and seems that you have functional solution.

Thanks a lot !

Martin