How to make GBE as DHCP server using NDK?

#include <stdio.h>
#include <ti/ndk/inc/netmain.h>
#include <ti/sysbios/BIOS.h>
#include <xdc/runtime/System.h>
#include "ti/platform/platform.h"
#include "ti/platform/resource_mgr.h"

char *VerStr = "\nWavepop K7_C6670 Board TCP/IP Stack Test Application\n\n";

// Our NETCTRL callback functions
static void   NetworkOpen();
static void   NetworkClose();
static void   NetworkIPAddr( IPN IPAddr, uint IfIdx, uint fAdd );

// Fun reporting function
static void   ServiceReport( uint Item, uint Status, uint Report, HANDLE hCfgEntry );

// External references
extern int dtask_udp_hello();

//---------------------------------------------------------------------------
// Configuration
//
char *HostName    = "tidsp";
char *LocalIPAddr = "192.168.1.100";
char *LocalIPMask = "255.255.255.0";    // Not used when using DHCP
char *GatewayIP   = "192.168.2.101";    // Not used when using DHCP
char *DomainName  = "demo.net";         // Not used when using DHCP
char *DNSServer   = "0.0.0.0";          // Used when set to anything but zero

// Simulator EMAC Switch does not handle ALE_LEARN mode, so please configure the
// MAC address of the PC where you want to launch the webpages and initiate PING to NDK */

Uint8 clientMACAddress [6] = {0x5C, 0x26, 0x0A, 0x69, 0x44, 0x0B}; /* MAC address for my PC */
void EVM_init()
{
	platform_init_flags   sFlags;
	platform_init_config  sConfig;

	memset( (void *) &sFlags,  0, sizeof(platform_init_flags));
	memset( (void *) &sConfig, 0, sizeof(platform_init_config));

    sFlags.pll  = 0; /* PLLs for clocking    */
    sFlags.ddr  = 0;     /* External memory    */
    sFlags.tcsl = 1; /* Time stamp counter   */
    sFlags.phy  = 1; /* Ethernet       */
    sFlags.ecc  = 0; /* Memory ECC       */
    sConfig.pllm = 0;  /* Use libraries default clock divisor */

    platform_init(&sFlags, &sConfig);
}

//---------------------------------------------------------------------
// Main Entry Point
//---------------------------------------------------------------------
int main()
{
 /* Start the BIOS 6 Scheduler */
 BIOS_start ();
}

// Main Thread
int StackTest()
{
    int             rc;
    int        i;
    HANDLE          hCfg;
    QMSS_CFG_T      qmss_cfg;
    CPPI_CFG_T      cppi_cfg;

    /* Initialize the components required to run this application:
     *  (1) QMSS
     *  (2) CPPI
     *  (3) Packet Accelerator
     */
    /* Initialize QMSS */
    if (platform_get_coreid() == 0)
    {
        qmss_cfg.master_core        = 1;
    }
    else
    {
        qmss_cfg.master_core        = 0;
    }
    qmss_cfg.max_num_desc       = MAX_NUM_DESC;
    qmss_cfg.desc_size          = MAX_DESC_SIZE;
    qmss_cfg.mem_region         = Qmss_MemRegion_MEMORY_REGION0;
    if (res_mgr_init_qmss (&qmss_cfg) != 0)
    {
        System_printf ("Failed to initialize the QMSS subsystem \n");
        goto main_exit;
    }
    else
    {
     System_printf ("QMSS successfully initialized \n");
    }

    /* Initialize CPPI */
    if (platform_get_coreid() == 0)
    {
        cppi_cfg.master_core        = 1;
    }
    else
    {
        cppi_cfg.master_core        = 0;
    }
    cppi_cfg.dma_num            = Cppi_CpDma_PASS_CPDMA;
    cppi_cfg.num_tx_queues      = NUM_PA_TX_QUEUES;
    cppi_cfg.num_rx_channels    = NUM_PA_RX_CHANNELS;
    if (res_mgr_init_cppi (&cppi_cfg) != 0)
    {
        System_printf ("Failed to initialize CPPI subsystem \n");
        goto main_exit;
    }
    else
    {
    	System_printf ("CPPI successfully initialized \n");
    }


    if (res_mgr_init_pass()!= 0) {
        System_printf ("Failed to initialize the Packet Accelerator \n");
        goto main_exit;
    }
    else
    {
    	System_printf ("PA successfully initialized \n");
    }

    //
    // THIS MUST BE THE ABSOLUTE FIRST THING DONE IN AN APPLICATION!!
    //
    rc = NC_SystemOpen( NC_PRIORITY_LOW, NC_OPMODE_INTERRUPT );
    if( rc )
    {
        System_printf("NC_SystemOpen Failed (%d)\n",rc);
        for(;;);
    }

    // Print out our banner
    System_printf(VerStr);

    //
    // Create and build the system configuration from scratch.
    //

    // Create a new configuration
    hCfg = CfgNew();
    if( !hCfg )
    {
        System_printf("Unable to create configuration\n");
        goto main_exit;
    }

    // We better validate the length of the supplied names
    if( strlen( DomainName ) >= CFG_DOMAIN_MAX ||
        strlen( HostName ) >= CFG_HOSTNAME_MAX )
    {
        System_printf("Names too long\n");
        goto main_exit;
    }

    // Add our global hostname to hCfg (to be claimed in all connected domains)
    CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_HOSTNAME, 0,
                 strlen(HostName), (UINT8 *)HostName, 0 );

    // If the IP address is specified, manually configure IP and Gateway
    if (0)
    {
        CI_IPNET NA;
        CI_ROUTE RT;
        IPN      IPTmp;
        int		return_value = 0;

        // Setup manual IP address
        bzero( &NA, sizeof(NA) );
        NA.IPAddr  = inet_addr(LocalIPAddr);
        NA.IPMask  = inet_addr(LocalIPMask);
        strcpy( NA.Domain, DomainName );
        NA.NetType = 0;

        // Add the address to interface 1
        return_value = CfgAddEntry( hCfg, CFGTAG_IPNET, 1, 0,
                           sizeof(CI_IPNET), (UINT8 *)&NA, 0 );

        // Add the default gateway. Since it is the default, the
        // destination address and mask are both zero (we go ahead
        // and show the assignment for clarity).
        bzero( &RT, sizeof(RT) );
        RT.IPDestAddr = 0;
        RT.IPDestMask = 0;
        RT.IPGateAddr = inet_addr(GatewayIP);

        // Add the route
        CfgAddEntry( hCfg, CFGTAG_ROUTE, 0, 0,
                           sizeof(CI_ROUTE), (UINT8 *)&RT, 0 );

        // Manually add the DNS server when specified
        IPTmp = inet_addr(DNSServer);
        if( IPTmp )
            CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,
                         0, sizeof(IPTmp), (UINT8 *)&IPTmp, 0 );
    }
    // Else we specify DHCP
    else if(0)
    {
        CI_SERVICE_DHCPC dhcpc;

        // Specify DHCP Service on IF-1
        bzero( &dhcpc, sizeof(dhcpc) );
        dhcpc.cisargs.Mode   = CIS_FLG_IFIDXVALID;
        dhcpc.cisargs.IfIdx  = 1;
        dhcpc.cisargs.pCbSrv = &ServiceReport;
        CfgAddEntry( hCfg, CFGTAG_SERVICE, CFGITEM_SERVICE_DHCPCLIENT, 0,
                     sizeof(dhcpc), (UINT8 *)&dhcpc, 0 );
    }
    else
    {
    	printf("DHCP Server start...\n");

    	CI_SERVICE_DHCPS dhcps;
    	CI_ROUTE RT;

        // Specify DHCP Server Service on IF-1
        bzero( &dhcps, sizeof(dhcps) );
        dhcps.cisargs.Mode   	= CIS_FLG_IFIDXVALID;
        dhcps.cisargs.IfIdx  	= 1;
        dhcps.cisargs.pCbSrv 	= &ServiceReport;
        dhcps.param.Flags		= DHCPS_FLG_LOCALDNS;
        dhcps.param.PoolBase	= inet_addr("192.168.1.100");
        dhcps.param.PoolCount	= 10;
        CfgAddEntry( hCfg, CFGTAG_SERVICE, CFGITEM_SERVICE_DHCPSERVER, 0,
                     sizeof(dhcps), (UINT8 *)&dhcps, 0 );

        bzero( &RT, sizeof(RT) );
        RT.IPDestAddr = inet_addr("192.168.1.1");;
        RT.IPDestMask = inet_addr(LocalIPMask);
        // Add the route
        CfgAddEntry( hCfg, CFGTAG_ROUTE, 0, 0,
                           sizeof(CI_ROUTE), (UINT8 *)&RT, 0 );
    }

    //
    // Configure IPStack/OS Options
    //

    // We don't want to see debug messages less than WARNINGS
    rc = DBG_WARN;
    CfgAddEntry( hCfg, CFGTAG_OS, CFGITEM_OS_DBGPRINTLEVEL,
                 CFG_ADDMODE_UNIQUE, sizeof(uint), (UINT8 *)&rc, 0 );

    //
    // This code sets up the TCP and UDP buffer sizes
    // (Note 8192 is actually the default. This code is here to
    // illustrate how the buffer and limit sizes are configured.)
    //

    // UDP Receive limit
    rc = 8192;
    CfgAddEntry( hCfg, CFGTAG_IP, CFGITEM_IP_SOCKUDPRXLIMIT,
                 CFG_ADDMODE_UNIQUE, sizeof(uint), (UINT8 *)&rc, 0 );

    //
    // Boot the system using this configuration
    //
    // We keep booting until the function returns 0. This allows
    // us to have a "reboot" command.
    //
    do
    {
        rc = NC_NetStart( hCfg, NetworkOpen, NetworkClose, NetworkIPAddr );
    } while( rc > 0 );

    // Delete Configuration
    CfgFree( hCfg );

    // Close the OS
main_exit:
    NC_SystemClose();
    return(0);
}


//
// System Task Code [ Server Daemon Servers ]
//
static HANDLE hHello=0;

//
// NetworkOpen
//
// This function is called after the configuration has booted
//
static void NetworkOpen()
{
    // Create our local server
    hHello = DaemonNew( SOCK_DGRAM, 0, 7, dtask_udp_hello,
                       OS_TASKPRINORM, OS_TASKSTKNORM, 0, 1 );
}

//
// NetworkClose
//
// This function is called when the network is shutting down,
// or when it no longer has any IP addresses assigned to it.
//
static void NetworkClose()
{
    DaemonFree( hHello );
}


//
// NetworkIPAddr
//
// This function is called whenever an IP address binding is
// added or removed from the system.
//
static void NetworkIPAddr( IPN IPAddr, uint IfIdx, uint fAdd )
{
    IPN IPTmp;

    if( fAdd )
        System_printf("Network Added: ");
    else
        System_printf("Network Removed: ");

    // Print a message
    IPTmp = ntohl( IPAddr );
    System_printf("If-%d:%d.%d.%d.%d\n", IfIdx,
            (UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF,
            (UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF );
}

//
// Service Status Reports
//
// Here's a quick example of using service status updates
//
static char *TaskName[]  = { "Telnet","HTTP","NAT","DHCPS","DHCPC","DNS" };
static char *ReportStr[] = { "","Running","Updated","Complete","Fault" };
static char *StatusStr[] = { "Disabled","Waiting","IPTerm","Failed","Enabled" };
static void ServiceReport( uint Item, uint Status, uint Report, HANDLE h )
{
    System_printf( "Service Status: %-9s: %-9s: %-9s: %03d\n",
            TaskName[Item-1], StatusStr[Status],
            ReportStr[Report/256], Report&0xFF );

    //
    // Example of adding to the DHCP configuration space
    //
    // When using the DHCP client, the client has full control over access
    // to the first 256 entries in the CFGTAG_SYSINFO space.
    //
    // Note that the DHCP client will erase all CFGTAG_SYSINFO tags except
    // CFGITEM_DHCP_HOSTNAME. If the application needs to keep manual
    // entries in the DHCP tag range, then the code to maintain them should
    // be placed here.
    //
    // Here, we want to manually add a DNS server to the configuration, but
    // we can only do it once DHCP has finished its programming.
    //
    if( Item == CFGITEM_SERVICE_DHCPCLIENT &&
        Status == CIS_SRV_STATUS_ENABLED &&
        (Report == (NETTOOLS_STAT_RUNNING|DHCPCODE_IPADD) ||
         Report == (NETTOOLS_STAT_RUNNING|DHCPCODE_IPRENEW)) )
    {
        IPN IPTmp;

        // Manually add the DNS server when specified
        IPTmp = inet_addr(DNSServer);
        if( IPTmp )
            CfgAddEntry( 0, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,
                         0, sizeof(IPTmp), (UINT8 *)&IPTmp, 0 );
    }
}