dhcpdb.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/09/19 10:38:31 $
*  $Source: M:/psisrc/dhcp_svr/incl/rcs/dhcpdb.h $
*  $Revision: 1.3 $
*************************************************************************/

#define CLIENTIDMAX 6              /* Client ID bytes (e.g. ethernet addr)   */
#define HOSTNAMEMAX 64             /* bytes in DHCP sname field              */
#define BOOTFILEMAX 128            /* bytes in DHCP file field               */


typedef struct {
    char    nd_name[MAX_DEV_NAME];  /* server instance's device name */
                } DHCPD_CONFIG;


typedef struct
DhcpConfig {                       /* Client Database record                 */
     u8 dhcnf_clid[CLIENTIDMAX];   /* e.g. 6-byte ethernet address           */
     u16 dhcnf_clid_length;        /* e.g. 6 (must be <= CLIENTIDMAX)        */
     u32 dhcnf_ipMin;              /* range of IP addresses                  */
     u32 dhcnf_ipMax;              /*   (inclusive, host byte order)         */
     u32 dhcnf_secLease;           /* lease seconds                          */
     u8 dhcnf_sname[HOSTNAMEMAX];  /* for DHCP 'sname' field                 */
     u8 dhcnf_file[BOOTFILEMAX];   /* for DHCP 'file' field                  */
     u8 dhcnf_options[MAXNOPT];    /* optional (not msgtype,IP,server ID,etc)*/
                                   /* (must start with 4-byte magic cookie)  */
                                   /* (must end with endOption=255)          */
                                   /* As returned by dhcpConfigLookup() the  */
                                   /* dhcnf_options field must leave room    */
                                   /* for all the options added by calls to  */
                                   /* dhcpPutOption() in dhcpReply().        */
} DhcpConfig;



typedef struct
DHCP_LEASE {                       /* Lease of an IP address                 */
     struct DHCP_LEASE *p_previous; /* pointer to previous lease in list */
     struct DHCP_LEASE *p_next;     /* pointer to next lease in list */
     u32 ip;                       /* assigned ip address (host byte order)  */
     u8 clid[CLIENTIDMAX];         /* client identifier (e.g. ethernet addr) */
     u8 clid_length;               /* e.g. 6 (must be <= CLIENTIDMAX)        */
     u8 flags;
#       define DHL_ACKED        0x01 /*   false during pre-lease, true afterwd */
#       define DHL_RELEASED     0x02 /*   received DHCPRELEASE                 */
#       define DHL_CHANGED      0x04 /*   for efficient persisting of leases   */
#       define DHL_UNAVAILABLE  0x08
     u32 tstart;                   /* 'time' at start of lease (seconds)     */
     u32 secLease;                 /* duration in seconds                    */
} DHCP_LEASE;


                                   /* dhcpConfigLookup() return codes:       */
#define DHCP_CNF_OK        0       /* *config points to client config info   */
#define DHCP_CNF_NOTFOUND -1       /* client id not recognized (req ignored) */

     void
dhlSave(void);                     /* stub for saving lease linked list      */

     void
dhlRestore(void);                  /* stub for restoring lease linked list   */