Quadrotor

// 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_START 0

#define        STATE_DHCP_DISCOVER        1

#define        STATE_DHCP_REQUEST        2

#define        STATE_DHCP_LEASED        3

#define        STATE_DHCP_REREQUEST        4

#define        STATE_DHCP_RELEASE        5

#define DHCP_FLAGSBROADCAST        0x8000

/* UDP port numbers for DHCP */

#define        DHCP_SERVER_PORT        67        /* from server to client */

#define DHCP_CLIENT_PORT        68        /* from client to server */

/* DHCP message OP code */

#define DHCP_BOOTREQUEST        1

#define DHCP_BOOTREPLY                2

/* DHCP message type */

#define        DHCP_DISCOVER                1

#define DHCP_OFFER                  2

#define        DHCP_REQUEST                3

#define        DHCP_DECLINE                4

#define        DHCP_ACK                    5

#define DHCP_NAK                    6

#define        DHCP_RELEASE                7

#define DHCP_INFORM                  8

#define DHCP_HTYPE10MB                1

#define DHCP_HTYPE100MB                2

#define DHCP_HLENETHERNET        6

#define DHCP_HOPS                0

#define DHCP_SECS                0

#define MAGIC_COOKIE                0x63825363

#define MAX_DHCP_OPT        16

#define HOST_NAME "WIZnet"

enum

{

        padOption                =        0,

        subnetMask                =        1,

        timerOffset                =        2,

        routersOnSubnet                =        3,

        /* timeServer                =        4,

        nameServer                =        5,*/

        dns                        =        6,

        /*logServer                =        7,

        cookieServer                =        8,

        lprServer                =        9,

        impressServer                =        10,

        resourceLocationServer        =        11,*/

        hostName                =        12,

        /*bootFileSize                =        13,

        meritDumpFile                =        14,*/

        domainName                =        15,

        /*swapServer                =        16,

        rootPath                =        17,

        extentionsPath                =        18,

        IPforwarding                =        19,

        nonLocalSourceRouting        =        20,

        policyFilter                =        21,

        maxDgramReasmSize        =        22,

        defaultIPTTL                =        23,

        pathMTUagingTimeout        =        24,

        pathMTUplateauTable        =        25,

        ifMTU                        =        26,

        allSubnetsLocal                =        27,

        broadcastAddr                =        28,

        performMaskDiscovery        =        29,

        maskSupplier                =        30,

        performRouterDiscovery        =        31,

        routerSolicitationAddr        =        32,

        staticRoute                =        33,

        trailerEncapsulation        =        34,

        arpCacheTimeout                =        35,

        ethernetEncapsulation        =        36,

        tcpDefaultTTL                =        37,

        tcpKeepaliveInterval        =        38,

        tcpKeepaliveGarbage        =        39,

        nisDomainName                =        40,

        nisServers                =        41,

        ntpServers                =        42,

        vendorSpecificInfo        =        43,

        netBIOSnameServer        =        44,

        netBIOSdgramDistServer        =        45,

        netBIOSnodeType                =        46,

        netBIOSscope                =        47,

        xFontServer                =        48,

        xDisplayManager                =        49,*/

        dhcpRequestedIPaddr        =        50,

        dhcpIPaddrLeaseTime        =        51,

        /*dhcpOptionOverload        =        52,*/

        dhcpMessageType                =        53,

        dhcpServerIdentifier        =        54,

        dhcpParamRequest        =        55,

        /*dhcpMsg                        =        56,

        dhcpMaxMsgSize                =        57,*/

        dhcpT1value                =        58,

        dhcpT2value                =        59,

        /*dhcpClassIdentifier        =        60,*/

        dhcpClientIdentifier        =        61,

        endOption                =        255

};

typedef struct _RIP_MSG_FIXED

{

        uint8_t  op; 

        uint8_t  htype; 

        uint8_t  hlen;

        uint8_t  hops;

        uint32_t xid;

        uint16_t secs;

        uint16_t flags;

        uint8_t  ciaddr[4];

        uint8_t  yiaddr[4];

        uint8_t  siaddr[4];

        uint8_t  giaddr[4];

        uint8_t  chaddr[6];

}RIP_MSG_FIXED;

class DhcpClass {

private:

  uint32_t _dhcpInitialTransactionId;

  uint32_t _dhcpTransactionId;

  uint8_t  _dhcpMacAddr[6];

  uint8_t  _dhcpLocalIp[4];

  uint8_t  _dhcpSubnetMask[4];

  uint8_t  _dhcpGatewayIp[4];

  uint8_t  _dhcpDhcpServerIp[4];

  uint8_t  _dhcpDnsServerIp[4];

  EthernetUDP _dhcpUdpSocket;

  void presend_DHCP();

  void send_DHCP_MESSAGE(uint8_t, uint16_t);

  uint8_t parseDHCPResponse(unsigned long responseTimeout, uint32_t& transactionId);

public:

  IPAddress getLocalIp();

  IPAddress getSubnetMask();

  IPAddress getGatewayIp();

  IPAddress getDhcpServerIp();

  IPAddress getDnsServerIp();

  int beginWithDHCP(uint8_t *, unsigned long timeout = 60000, unsigned long responseTimeout = 4000);

};

#endif