[Click] Elements interconnection

[Cliff Frey]

you need to use cpElementCast rather than cpElement, see arpquerier.cc for
an example.

On Mon, Feb 8, 2010 at 8:39 AM, David Sesmero Sáez <deivid_sesme at hotmail.com
> wrote:

>
> Hi!
>
> I'm trying to pass one element into other element for using some functions
> of the element in the other element.. My .click is like this:
>
> tables::VlanTables(NUM_PORTS 8)
> vlanencap::VlanEncap(VLAN_MODE 0, TABLES tables)
>
> FromHost(tap3)->vlanencap->ToHost(tap4)
> FromHost(tap4)->Discard
>
> And inside VlanTables.cc I have got:
>
> int
> VlanTables::get_var()
> {
>    var=12;
>    return var;
> }
>
> In VlanEncap I tried to get these var, doing this:
>
> int
> VlanEncap::configure(Vector<String> &conf, ErrorHandler *errh)
> {
>    if (cp_va_kparse(conf, this, errh,
>        "VLAN_MODE",cpkP+cpkM,cpInteger,&vlan_mode,
>        "TABLES", cpElement, "tables", &tables,
>           cpEnd) < 0){
>        return -1;
>    }
> }
>
> void
> VlanEncap::push(int source, Packet *p)
> {
>    VlanTables *vlan_tables = static_cast<VlanTables *>(tables);
>                if (int var = vlan_tables->num_ports)
>                {
>                    click_chatter("Valor: %d",var);
>                }
>                else{
>                    click_chatter("Error");
>                }
> }
>
> When I compile the code there are no errors but when I run the .click, I
> have "Segmentation Fail" error.
>
> Anyone can help me please?
>
>
> Thanks,
> David Sesmero.
>
>
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