switch.hh

COPE the first practical network coding scheme which is developped on click

#ifndef CLICK_SWITCH_HH
#define CLICK_SWITCH_HH
#include <click/element.hh>
CLICK_DECLS

/*
=c

Switch([K])

=s classification

sends packet stream to settable output

=d

Switch sends every incoming packet to one of its output ports --
specifically, output number K. The default K is zero; negative K means to
destroy input packets instead of forwarding them. You can change K with a
write handler. Switch has an unlimited number of outputs.

=h switch read/write

Return or set the K parameter.

=h CLICK_LLRPC_GET_SWITCH llrpc

Argument is a pointer to an integer, in which the Switch's K parameter is
stored.

=h CLICK_LLRPC_SET_SWITCH llrpc

Argument is a pointer to an integer. Sets the K parameter to that integer.

=a StaticSwitch, PullSwitch, RoundRobinSwitch, StrideSwitch, HashSwitch,
RandomSwitch */

class Switch : public Element { public:

  Switch();
  ~Switch();
  
  const char *class_name() const		{ return "Switch"; }
  const char *processing() const		{ return PUSH; }
  void add_handlers();
  
  void notify_noutputs(int);
  int configure(Vector<String> &, ErrorHandler *);
  void configuration(Vector<String> &) const;
  bool can_live_reconfigure() const		{ return true; }
  
  void push(int, Packet *);

  int llrpc(unsigned, void *);
  
 private:

  int _output;

  static String read_param(Element *, void *);
  static int write_param(const String &, Element *, void *, ErrorHandler *);
  
};

CLICK_ENDDECLS
#endif