getipaddress.hh

来自「Click is a modular router toolkit. To us」· HH 代码 · 共 48 行

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

/*
 * =c
 * GetIPAddress(OFFSET)
 * =s ip
 * sets destination IP address annotation from packet data
 * =d
 *
 * Copies 4 bytes from the packet, starting at OFFSET, to the destination IP
 * address annotation. OFFSET is usually 16, to fetch the destination address
 * from an IP packet.
 *
 * =n
 * The destination address annotation is used by elements
 * that need to know where the packet is going.
 * Such elements include ARPQuerier and LookupIPRoute.
 *
 * =a ARPQuerier, StaticIPLookup, SetIPAddress, StoreIPAddress
 */


class GetIPAddress : public Element {

  int _offset;

 public:

  GetIPAddress();
  ~GetIPAddress();

  const char *class_name() const		{ return "GetIPAddress"; }
  const char *port_count() const		{ return PORTS_1_1; }
  const char *processing() const		{ return AGNOSTIC; }

  int configure(Vector<String> &, ErrorHandler *);

  Packet *simple_action(Packet *);

};

CLICK_ENDDECLS
#endif