Dhcp.h

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// DHCP Library v0.3 - April 25, 2009
// Author: Jordan Terrell - blog.jordanterrell.com
 
#ifndef Dhcp_h
#define Dhcp_h
 
#include "EthernetUdp.h"
 
/* DHCP state machine. */
#define STATE_DHCP_STOP       DHCP_OFF
#define STATE_DHCP_START      DHCP_START
#define STATE_DHCP_DISCOVER   DHCP_WAIT_ADDRESS
#define STATE_DHCP_REQUEST    0
#define STATE_DHCP_LEASED     DHCP_ADDRESS_ASSIGNED
#define STATE_DHCP_REREQUEST  0
#define STATE_DHCP_RELEASE    DHCP_ASK_RELEASE
 
#define DHCP_CHECK_NONE         (0)
#define DHCP_CHECK_RENEW_FAIL   (1)
#define DHCP_CHECK_RENEW_OK     (2)
#define DHCP_CHECK_REBIND_FAIL  (3)
#define DHCP_CHECK_REBIND_OK    (4)
 
class DhcpClass {
  private:
    uint8_t  _dhcpMacAddr[6];
    unsigned long _timeout;
    uint8_t _dhcp_lease_state;
    uint8_t _dhcp_state;
 
    int request_DHCP_lease();
    void reset_DHCP_lease();
 
  public:
    IPAddress getLocalIp();
    IPAddress getSubnetMask();
    IPAddress getGatewayIp();
    IPAddress getDhcpServerIp();
    IPAddress getDnsServerIp();
 
    int beginWithDHCP(uint8_t *mac, unsigned long timeout = 60000, unsigned long responseTimeout = 4000);
    int checkLease();
};
 
#endif