..back

/*****************************************************************************/
/**                                Microsoft Windows                            **/
/**   Copyright (c) 1997-2000 Microsoft Corporation.  All rights reserved.  **/
/*****************************************************************************/

/*
    protocol.h

  DESCRIPTION:
    contains the DHCP protocol structures and def's


*/
#ifndef _PROTOCOL_H_
#define _PROTOCOL_H_

#define CHADDR_LEN    16
#define SNAME_LEN    64
#define FILE_LEN    128
#define OPTIONS_LEN    312

typedef struct DhcpPkt {
    
    unsigned char    Op;
    unsigned char    Htype;
    unsigned char    Hlen;
    unsigned char    Hops;
    unsigned int    Xid;
    unsigned short    Secs;
    unsigned short    Flags;
    unsigned int    Ciaddr;
    unsigned int    Yiaddr;
    unsigned int    Siaddr;
    unsigned int    Giaddr;
    unsigned char    aChaddr[CHADDR_LEN];
    unsigned char    aSname[SNAME_LEN];
    unsigned char    aFile[FILE_LEN];
    unsigned char    aOptions[OPTIONS_LEN];

} DhcpPkt;

// we're being little-endian specific here

//    Flags
#define DHCP_BCAST_FL    0x0008


//    DHCP Message Types (after option DHCP_MSG_TYPE_OP)
#define DHCPDISCOVER    1
#define DHCPOFFER        2    
#define DHCPREQUEST        3
#define DHCPDECLINE        4
#define DHCPACK            5
#define DHCPNACK        6
#define DHCPRELEASE        7
#define DHCPINFORM        8


//    Function Declarations
void BuildDhcpPkt(DhcpInfo *pDhcp, DhcpPkt *pPkt, uchar Type, int fNew, 
                    uchar *aOptionList, int *pcPkt);
STATUS SendDhcpPkt(DhcpInfo *pDhcp, DhcpPkt *pPkt, int cPkt, 
                   uchar WaitforType, int Flags);

STATUS TranslatePkt(DhcpInfo *pDhcp, DhcpPkt *pPkt, int cPkt, uchar *pType,
                    unsigned int Xid);

// Flags for BuildDhcpPkt
#define NEW_PKT_FL    0x01
#define SID_PKT_FL    0x02    // Server Id flag
#define RIP_PKT_FL    0x04    // Requested IP addr option

// Flags for SendDhcpPkt
// first byte is number of times to loop...
#define LOOP_MASK_FL        0x00ff
#define ONCE_FL                0x0001
#define DFT_LOOP_FL            0x0004
#define BCAST_FL            0x0100


//    Magic Cookie in Little Endian format
#define MAGIC_COOKIE    0x63538263

//    Option Definitions (in decimal)
#define DHCP_PAD_OP                0
#define DHCP_END_OP                255

#define DHCP_SUBNET_OP            1
#define DHCP_ROUTER_OP            3
#define DHCP_DNS_OP                6
#define DHCP_HOST_NAME_OP        12
#define DHCP_DOMAIN_NAME_OP        15
#define DHCP_NBT_SRVR_OP        44
#define DHCP_NBT_NODE_TYPE_OP        46
#define DHCP_REQ_IP_OP            50
#define DHCP_IP_LEASE_OP        51
#define DHCP_OVERLOAD_OP        52
#define DHCP_MSG_TYPE_OP        53
#define DHCP_SERVER_ID_OP        54
#define DHCP_PARAMETER_REQ_OP    55
#define DHCP_MESSAGE_OP            56
#define DHCP_T1_VALUE_OP        58
#define DHCP_T2_VALUE_OP        59
#define DHCP_CLIENT_ID_OP        61
#define DHCP_MSFT_AUTOCONF      251


//    Unused Options (decimal)
#if 0

#define DHCP_TIME_OFFSET_OP            2
#define DHCP_TIME_SRVR_OP            4
#define DHCP_NAME_SRVR_OP            5
#define DHCP_LOG_SRVR_OP            7
#define DHCP_COOKIE_SRVR_OP            8
#define DHCP_LPR_SRVR_OP            9
#define DHCP_IMPRESS_SRVR_OP        10
#define DHCP_RES_LOC_SRVR_OP        11    // Resource location server option
#define DHCP_BOOTFILE_SIZE_OP        13
#define DHCP_MERIT_DUMP_FILE_OP        14
#define DHCP_SWAP_SRVR_OP            16
#define DHCP_ROOT_PATH_OP            17
#define DHCP_EXT_PATH_OP            18
#define DHCP_IP_FORWARDING_OP        19
#define DHCP_NONLOCAL_SRCROUTE_OP    20
#define DHCP_POLICY_FILTER_OP        21
#define DHCP_MAX_DGRAM_REASSEMBLE_SIZE_OP    22
#define DHCP_IP_TTL_OP                23
#define DHCP_PATH_MTU_TO_OP            24
#define DHCP_PATH_MTU_PLATEAU_OP    25
#define DHCP_INTERFACE_MTU_OP        26
#define DHCP_ALL_SUBNETS_LOCAL_OP    27
#define DHCP_BCAST_ADDR_OP            28
#define DHCP_MASK_DISCOVERY_OP        29
#define DHCP_MASK_SUPPLIER_OP        30
#define DHCP_ROUTER_DISCOVERY_OP    31
#define DHCP_ROUTER_SOLICIT_ADDR_OP    32
#define DHCP_STATIC_ROUTE_OP        33
#define DHCP_TRAILER_ENCAPSULATE_OP    34
#define DHCP_ARP_CACHE_TO_OP            35
#define DHCP_ETHERNET_ENCAPSULATE_OP    36
#define DHCP_TCP_TTL_OP                    37
#define DHCP_TCP_KEEPALIVE_INTVL_OP        38
#define DHCP_TCP_KEEPALIVE_GARBAGE_OP    39
#define DHCP_NIS_DOMAIN_OP                40
#define DHCP_NETWORK_INFO_SRVRS_OP    41
#define DHCP_NETWORK_TIME_SRVRS_OP    42
#define DHCP_VENDOR_SPECIFIC_OP        43
#define DHCP_NBDD_OP                45
#define DHCP_NBT_SCOPE_OP            47
#define DHCP_XWINDOW_FONT_SRVR_OP    48
#define DHCP_XWINDOW_DISPLAY_MGR_OP    49
#define DHCP_NISP_DOMAIN_OP            64
#define DHCP_NISP_SRVRS_OP            65
#define DHCP_MOBILE_IP_AGENT_OP        68
#define DHCP_SMTP_SRVR_OP            69
#define DHCP_POP3_SRVR_OP            70
#define DHCP_NNTP_SRVR_OP            71
#define DHCP_WWW_SRVR_OP            72
#define DHCP_DEFAULT_FINGER_OP        73
#define DHCP_DEFAULT_IRC_SRVR_OP    74    //    default Internet relay chat server
#define DHCP_STREETTALK_SRVR_OP        75
#define DHCP_STDA_SRVR_OP            76
#define DHCP_TFTP_SRVR_NAME_OP        66
#define DHCP_BOOTFILE_NAME_OP        67
#define DHCP_MAX_DHCP_MSG_OP        57
#define DHCP_VENDOR_CLASS_ID_OP        60


#endif	// 0

#endif	// _PROTOCOL_H_