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CCS/TMS320C6457: NDK DHCP IPServer

Vladimir Solodky
Intellectual 550 points
Part Number: TMS320C6457

Tool/software: Code Composer Studio

How to get the IP address of the DHCP server?

  • 0
    TI__Guru* 95265 points

    Hi,

    Can you clarify what TI software package you used? C6457 is a very old device, the software package may similar to what we have for the C665x, C667x. In that we have a "hello world" example, it is RTOS using NDK and NIMU driver. The hello world can use either a static IP address or DHCP. 

    When using the DHCP, the C66x or C64x is the DHCP client and sends out the discovery packets. The DHCP server is on the same network and you configured with an IP address, do you mean in your C64x application how you read out/record the DHCP server IP address?

    Regards, Eric    

  • 0 in reply to lding
    Intellectual 550 points

    I use ndk_2_23_02_03.

    Yes, I need DHCP server IP address. 

  • 0 in reply to Vladimir Solodky
    TI__Guru* 95265 points

    Hi,

    I searched NDK source code, ndk_2/3_xx_xx_xx\packages\ti\ndk\nettools\dhcp, there is a:

    /* structure of a DHCP lease information */
    typedef struct _dhcpLEASE
    {
    UINT16 StateInitial; /* Starting State */
    UINT16 State; /* Current State */
    UINT16 StateNext; /* Next State */
    IPN IPAddress; /* IP Address from DHCP Server */
    IPN IPAddressOld; /* IP Address being used */
    IPN IPSubnetMask; /* IP SubnetMask */
    IPN IPGate; /* IP Gateway Address */
    UINT32 LeaseExpires; /* Time to moved to Init State *

    ...

    }

    Code:

    static void StateSelecting(DHCPLEASE *pLease)
    {
    IPN IPOffer,IPServer;
    UINT16 MaxTries;
    UINT32 TimeStart;

    MaxTries = 3;
    Retry:
    #if DEBUGON
    DbgPrintf(DBG_INFO, "DHCP: StateSelecting:\r\n");
    #endif

    /* Build the DHCP request packet and Send it */
    pLease->SendSize = dhcpBuildDiscover(pLease);
    dhcpPacketSend( pLease, INADDR_BROADCAST );

    /* Get the time */
    TimeStart = llTimerGetTime(0);

    while( (TimeStart + 2) >= llTimerGetTime(0) )
    {
    /* Get reply (waits for 3 seconds) */
    dhcpPacketReceive(pLease);

    if( dhcpVerifyMessage( pLease, &IPOffer, &IPServer ) == DHCPOFFER)
    {
    pLease->IPAddress = IPOffer;
    pLease->IPServer = IPServer;
    pLease->StateNext = REQUESTING;
    return;
    }
    }

    You can find DHCP server address here.

    Regards, Eric