Re: [lwip-users] How to get network address (MAC) of gateway

[address@hidden]

If you are looking for a thread-safe way to implement the code below, 
you can use tcpip_callback() to call a void function taking one 
void-pointer as argument, in which you can safely call the etharp 
functions. tcpip_callback() lets the working task block until the 
function has finished.

Simon



B B wrote:
> Hi Kieran,
>  
> Yes it does.
>  
> I am currently working on a solution, which looks like this:
>  
>
> // DHCP negotiation succeeded
>
> // Get MAC Address for default gateway
>
> mscnt = 0;
>
> *while* (mscnt < 3000)
>
> {
>
> *if* (etharp_query(&EMAC_if, &(EMAC_if.gw), NULL) != ERR_OK)
>
> {
>
> // Error could not perform ARP query!
>
> }
>
> *else*
>
> {
>
> *if* (etharp_find_addr(&EMAC_if, &(EMAC_if.gw), &ethaddr_ret, 
> &ipaddr_ret) > -1)
>
> {
>
> // Store MAC Address
>
> *break*;
>
> }
>
> }
>
> vTaskDelay(DHCP_FINE_TIMER_MSECS);
>
> mscnt += DHCP_FINE_TIMER_MSECS;
>
> }
>  
> Although it isn't necessary at this point, i guess the above is not 
> thread safe.
> Any advice is greatly appreciated.
>  
> regards,
> Martin
>
>
>
> ------------------------------------------------------------------------
>
> > Subject: RE: [lwip-users] How to get network address (MAC) of gateway
> > From: address@hidden
> > To: address@hidden
> > Date: Thu, 9 Oct 2008 09:23:11 +0100
> >
> > On Thu, 2008-10-09 at 09:16 +0200, B B wrote:
> > >
> > > Hi again,
> > >
> > > i am still looking into this, if someone could tell if this is
> > > possible or not,
> > > that would be very helpful.
> > >
> > > I am using the netconn api. and lwip is running in an OS, freertos.
> > >
> > > I have looked at etharp.c, and i see that i can make a query, but this
> > > only, gives an indication of whether or not an ip address is in use.
> > > Thats how dhcp is using this module.
> > >
> > > I my case, the dhcp server and default gateway, is not one and the
> > > same.
> >
> > Does the reply from the DHCP server when you request an IP address
> > include the gateway to use?
> >
> > Kieran
> >
> >
> >
> > _______________________________________________
> > lwip-users mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/lwip-users
>
>
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