dhcp.h

Go to the documentation of this file.

/* dhcp.h - Definitions related to DHCP */

#define DHCP

#define DHCP_RETRY  5

#define DHCP_PADDING                    0
#define DHCP_SUBNET_MASK                1
#define DHCP_ROUTER                     3
#define DHCP_DNS_SERVER                 6
#define DHCP_DOMAIN_NAME                15
#define DHCP_VENDER_OPTIONS             43
#define DHCP_REQUESTED_IP               50
#define DHCP_IP_ADDR_LEASE_TIME         51
#define DHCP_OPTION_OVERLOAD            52
#define DHCP_MESSAGE_TYPE               53
#define DHCP_SERVER_ID                  54
#define DHCP_PARAMETER_REQUEST_LIST     55
#define DHCP_MESSAGE                    56
#define DHCP_MAXIMUM_DHCP_MESSAGE_SIZE  57
#define DHCP_RENEWAL_TIME_VALUE         58
#define DHCP_REBINDING_TIME_VALUE       59
#define DHCP_VENDOR_CLASS_ID            60
#define DHCP_CLIENT_ID                  61
#define DHCP_TFTP_SERVER_NAME           66
#define DHCP_BOOTFILE_NAME              67
#define DHCP_CLIENT_SYS_ARCH            93
#define DHCP_CLIENT_NET_ID              94
#define DHCP_CLIENT_MACHINE_ID          97
#define DHCP_MESSAGE_END               255

#pragma pack(2)
struct  dhcpmsg {
    byte    dc_bop;         /* DHCP bootp op 1=req 2=reply  */
    byte    dc_htype;       /* DHCP hardware type       */
    byte    dc_hlen;        /* DHCP hardware address length */
    byte    dc_hops;        /* DHCP hop count       */
    uint32  dc_xid;         /* DHCP xid         */
    uint16  dc_secs;        /* DHCP seconds         */
    uint16  dc_flags;       /* DHCP flags           */
    uint32  dc_cip;         /* DHCP client IP address   */
    uint32  dc_yip;         /* DHCP your IP address     */
    uint32  dc_sip;         /* DHCP server IP address   */
    uint32  dc_gip;         /* DHCP gateway IP address  */
    byte    dc_chaddr[16];      /* DHCP client hardware address */
    union {
        byte    dc_bootp[192];  /* DHCP bootp area (zero)   */
        struct {
            byte   sname[64];   /* TFTP Server Name */
            byte   bootfile[128];   /* TFTP File name   */
        };
    };
    uint32  dc_cookie;      /* DHCP cookie          */
    byte    dc_opt[1024];       /* DHCP options area (large */
                    /*  enough to hold more than    */
                    /*  reasonable options      */
};
#pragma pack()