DHCP.H

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#ifndef DHCP_H
#define DHCP_H

typedef unsigned char INT8U;
typedef unsigned short int WORD;            // 16-bit(全局)
typedef unsigned long LONG;                // 32-bit（全局）
typedef enum _BOOL { FALSE = 0, TRUE } BOOL;

#define SUCCESS                         (1u)
#define FAIL                           (0u)

#define DHCP_TIMEOUT                    (TICK)(2L * TICK_SECOND)
//#define TRUE        1
//#define FALSE       0

#define DHCP_CLIENT_PORT                (68u)
#define DHCP_SERVER_PORT                (67u)

#define BOOT_REQUEST                    (1u)
#define BOOT_REPLY                      (2u)
#define HW_TYPE                         (1u)
#define LEN_OF_HW_TYPE                  (6u)

#define DHCP_MESSAGE_TYPE               (53u)
#define DHCP_MESSAGE_TYPE_LEN           (1u)

#define DHCP_UNKNOWN_MESSAGE            (0u)

#define DHCP_DISCOVER_MESSAGE           (1u)
#define DHCP_OFFER_MESSAGE              (2u)
#define DHCP_REQUEST_MESSAGE            (3u)
#define DHCP_DECLINE_MESSAGE            (4u)
#define DHCP_ACK_MESSAGE                (5u)
#define DHCP_NAK_MESSAGE                (6u)
#define DHCP_RELEASE_MESSAGE            (7u)

#define DHCP_SERVER_IDENTIFIER          (54u)
#define DHCP_SERVER_IDENTIFIER_LEN      (4u)

#define DHCP_PARAM_REQUEST_LIST         (55u)
#define DHCP_PARAM_REQUEST_LIST_LEN     (2u)
#define DHCP_PARAM_REQUEST_IP_ADDRESS       (50u)
#define DHCP_PARAM_REQUEST_IP_ADDRESS_LEN   (4u)
#define DHCP_SUBNET_MASK                (1u)
#define DHCP_ROUTER                     (3u)
#define DHCP_IP_LEASE_TIME              (51u)
#define DHCP_END_OPTION                 (255u)

//#define HALF_HOUR                       (WORD)((WORD)60 * (WORD)30)
//#define INVALID_UDP_SOCKET      (0xff)
//#define INVALID_UDP_PORT        (0L)
#define SIZE_OF_DHCPMES   548   //标准DHCP报文字节大小

INT8U SizeOfOptionsUsed;    //DHCP报文options字段使用的字节
INT8U SizeOfDHCPMesUsed; //DHCP报文全部字段使用字节长度


typedef enum _SM_DHCP
{
// SM_DHCP_INIT_FIRST_TIME,
    SM_DHCP_INIT,
//    SM_DHCP_RESET_WAIT,
    SM_DHCP_BROADCAST,
    SM_DHCP_DISCOVER,
    SM_DHCP_REQUEST,
    SM_DHCP_BIND,
    SM_DHCP_BOUND,
    SM_DHCP_DISABLED,
} SM_DHCP;
#if !defined(THIS_IS_DHCP)
    extern SM_DHCP smDHCPState;
#endif

typedef union DHCP_STATE
{
    struct
    {
        unsigned char bIsBound : 1;
        unsigned char bOfferReceived : 1;
    } bits;
    INT8U Val;
} DHCP_STATE;
#if !defined(THIS_IS_DHCP)
    extern DHCP_STATE DHCPState;
#endif

 

typedef struct _DHCP_MES
{
    INT8U  op   ;
 INT8U  htype ;
 INT8U  hlen   ;
 INT8U   hops   ;
 INT8U  xid [4];
 INT8U  secs [2];
 INT8U  flags [2];
 INT8U  ciaddr [4];
 INT8U  yiaddr [4];
 INT8U  siaddr [4];
 INT8U  giaddr [4];
 INT8U  chaddr [16];
 INT8U  sname [64];
 INT8U  file [128];
 INT8U       options[312];    //长度不定
}  DHCP_MES;

INT8U UDP_GetDHCPMes;


#define DHCPDisable()       (smDHCPState = SM_DHCP_DISABLED)
#define DHCPIsBound()       (DHCPState.bits.bIsBound)


void DHCP_Task(void);
void DHCP_Reset(void);

#endif