Netdemo and ARP protocol

[Ian Caddy]

Hi Mario,

We use the network stack in RTEMS 4.5.0 with no problems, but our use is 
with a Coldfire processor.

Maybe there is an issue with the way the stack works in your processor 
model.

Has anybody else used the network stack with an I960?

Talk to you soon,

Ian Caddy

Mario Vieira wrote:

>
> Hi IAn,
>
> Thank you for your answer.
>
> I'm using two board's. One is a processing board using Intel's I960 
> JA, the second board is the network interface with the marvell's 
> GT-4800A1.
>
>
> I trying with a another physical address ( this one not a broadcast or 
> multicast packet ) and the result is the same.
>
>
> Althought the packet i sent you in last e-mail was taken from a real 
> packet sniffer I printed  the buffer on screen in the network transmit 
> task
> and the values are the same. Because of this I think the problem is 
> with the constrution of the packet inside the network stack.
>
>
> best regards,
> Mário Vieira
>
>
>
>
>
>
> Hi Mario,
>
> I am not quite sure what processor, or Ethernet chip you are using so it
> is hard to give detailed information but I have a couple of pointers for
> you.
>
> 1. Your physical address that you are using is a multi-cast address and
> shouldn't be used for your normal Ethernet address.  The 6 byte physical
> address should NOT set the lowest bit of the first byte, i.e. your first
> byte is 0x31.  The 1 indicates a multicast address.  This will cause all
> sorts of problems.  I recommend that you set this byte to 0.  Also, if
> you want to talk to real pieces of equipment you will have to get a
> proper Ethernet address at some stage.
>
> 2.  Are you writing your own Ethernet driver or just trying to get one
> of the existing drivers running?
>
> regards,
>
> Ian Caddy
>
>
> Mario Vieira wrote:
>
> >
> > Hi, I am a newbie with RTEMS and I need help.
> >
> >
> > I am porting RTEMS to a board from quicklogic. I'm testing the network
> > with the netdemos-4.5.0/netdemo and I find out (printing the mbuffer)
> > that the initial ARP packet that is sent is incorrect.
> > Below I send the capture packet that is exactly like the mbuffer:
> >
> >
> > Frame 1 (60 on wire, 60 captured)
> >     Packet Length: 60 bytes
> >     Capture Length: 60 bytes
> > Ethernet II
> >     Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
> >     Source: 31:32:33:34:35:36 (31:32:33:34:35:36)
> >     Type: ARP (0x0806)
> >     Trailer: 0000C1888F010000000004D200090328...
> > Address Resolution Protocol (opcode 0x0604)
> >     Hardware type:  (0x0000)                                 <- HERE 
> short
> >     Protocol type: Unknown (0x0001)
> >     Hardware size: 8
> >     Protocol size: 0
> >     Opcode: Unknown (0x0604)
> >     Sender hardware address: 0001313233343536
> >     Target hardware address: C1888F0100000000  
> >
> >
> > The "HERE short" isn't supposed to be there. From there the codes are
> > correct but moved 2 bytes.
> >
> > I look at the procedure to send out ARP Requests but I could see what
> > is wrong.
> > Please help me.
> >
> > Thanks in advance,
> > Mário Vieira
>
>
> -- 
>
> ianc at microsol.iinet.net.au
> Microsol (Aust) Pty Ltd
> Suite 4, Enterprise Centre 3
> 11 Brodie Hall Drive
> Bentley, WA, 6102
> Phone: (+61) 08 9473 6600 Fax:   (+61) 08 9473 6699
>
>
>
>

-- 

ianc at microsol.iinet.net.au
Microsol (Aust) Pty Ltd
Suite 4, Enterprise Centre 3
11 Brodie Hall Drive
Bentley, WA, 6102
Phone: (+61) 08 9473 6600 Fax:   (+61) 08 9473 6699