MQX Software Solutions中的主题 Re: Routing RTCS to separate modem

Routing RTCS to separate modem

dnfuss1 — Thu, 11 Feb 2021 12:45:22 GMT

I have a product where internet connectivity is already being provided by a modem, whose network stack allows direct access to ip-level traffic.

We have recently added ethernet LAN connectivity to this product using RTCS (v4.2.0.2) and a PHY and are looking for an efficient way to route LAN traffic to/from the modem.

I'd be grateful for suggestions as to how this might be best achieved- e.g. can we send/receive data directly at the IP/Network layer within RTCS (akin to a router), or can this only be achieved higher-up the stack via sockets, etc..

Many thanks

David

Re: Routing RTCS to separate modem

danielchen — Mon, 22 Feb 2021 05:42:34 GMT

There is a RTCS example demonstrates the gateway feature of the RTCS TCP/IP stack.

Freescale_MQX_4_2\rtcs\examples\shell

To add a gateway to the routing table, use the "gate <gateway> [<netaddr> <netmask>]" command.

For example:

shell> gate 192.168.0.5
Adding gateway 192.168.0.5, ip address: 0.0.0.0, netmask: 0.0.0.0

Regards

Daniel

Re: Routing RTCS to separate modem

dnfuss1 — Tue, 23 Feb 2021 15:26:48 GMT

Hi Daniel

Thank you for this. My understanding is that there needs to be an interface to associate with the default gateway that you propose adding. If I understand your suggestion correctly, as my RTCS stack has only one physical interface, I must therefore create a 'virtual' interface to associate with the default gateway, within which the exchange of datagrams between the two stacks takes place.
Have I understood correctly?

Many thanks

David

Re: Routing RTCS to separate modem

danielchen — Wed, 31 Mar 2021 07:18:10 GMT

I think you have two interfaces:

--GPRS (PPP)

--Ethernet