Unable to Set DNS IP

Soumyajit Das

Genius 3340 points

Other Parts Discussed in Thread: EK-TM4C1294XL

MCU: TM4C1294NCPDT

TI-RTOS: v2.01.00.03

NDK: v2.23.01.01

CCS: v6.0.1.0040

Hi,

I have the following code setup, still I am unable to set the DNS IP to be used by NDK. In the task "someTaskFxn()", the console is printing "CfgGetImmediate(DNS) = 0" & "DNS IP = 255.255.255.255" & "DNSGetHostByName = 19".

SECTION OF THE .cfg FILE:

EMAC.libType = EMAC.LibType_NonInstrumented;
Global.IPv6 = false;
Ip.autoIp = true;
Ip.address = "";
Ip.mask = "255.255.255.0";
Ip.gatewayIpAddr = "192.168.1.2";
Ip.domainName = "domain.com";
var http0Params = new Http.Params();
var http0 = Http.create(http0Params);
Global.lowTaskPriLevel = 3;
Global.stackInitHook = "&AddWebFiles";
Global.stackDeleteHook = "&RemoveWebFiles";
Global.networkIPAddrHook = "&mynetworkIPAddrHook";
Global.networkOpenHook = "&functionNetworkOpenHook";

SECTION of the .c FILE:

Void functionNetworkOpenHook(Void)
{
char *HostName = "_csl_";
IPN IPTmp;

if(usr_s.eth_dhcp_enabled == true)
{
System_printf("NetworkOpenHook: DHCP EN\n");
}

else
{
System_printf("NetworkOpenHook: DHCP DIS, (%s,%s,%s)\n", usr_s.eth_static_ip, usr_s.eth_subnet_mask, usr_s.eth_gateway);

CI_IPNET NA;
CI_ROUTE RT;

HANDLE hCfgIpAddr, hCfg;

/* Setup manual IP address */
bzero(&NA, sizeof(NA));
NA.IPAddr = inet_addr(usr_s.eth_static_ip);
NA.IPMask = inet_addr(usr_s.eth_subnet_mask);
strcpy(NA.Domain, "demo.net");
NA.NetType = 0;

/* get the current static IP entry */
CfgGetEntry(0, CFGTAG_IPNET, 1, 1, &hCfgIpAddr);

/* remove the current static IP entry */
CfgRemoveEntry(0, hCfgIpAddr);

/* add a new static IP entry */
CfgAddEntry(0, CFGTAG_IPNET, 1, 0,
sizeof(CI_IPNET), (UINT8 *)&NA, 0);

// Add the default gateway.

bzero( &RT, sizeof(RT) );
RT.IPDestAddr = 0;
RT.IPDestMask = 0;
RT.IPGateAddr = inet_addr(usr_s.eth_gateway);

hCfg = CfgNew();
CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_HOSTNAME, 0,
strlen(HostName), (UINT8 *)HostName, 0 );

// 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("192.168.1.5");
if(IPTmp)
{
CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,
0, sizeof(IPTmp), (UINT8 *)&IPTmp, 0 );
}

}

void mynetworkIPAddrHook(IPN IPAddr, uint IfIdx, uint fAdd)
{
IPN IPTmp;int rc = 0;

CI_IPNET NA;
char IPString[16];

/* Initialize the IP Address block. */
bzero (&NA, sizeof(CI_IPNET));

if(fAdd)

{
System_printf("networkIPAddrHook: Network Added");
}
else
{
System_printf("networkIPAddrHook: Network Removed");
}

IPTmp = ntohl(IPAddr);
System_printf("networkIPAddrHook:\tIf-%d:%d.%d.%d.%d\n", IfIdx,
(UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF,
(UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF);

sprintf(current_ip, "%d.%d.%d.%d", (UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF, (UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF);

/* Print the IP address information only if one is present. */
if (CfgGetImmediate( 0, CFGTAG_IPNET, 1, 1, sizeof(NA), (UINT8 *)&NA) == sizeof(NA))
{
/* Yes the device was configured and we got the IP address/Mask */
NtIPN2Str (NA.IPAddr, IPString);
System_printf("IP Address: %s\n", IPString);
NtIPN2Str (NA.IPMask, IPString);
System_printf("IP Subnet Mask: %s\n", IPString);
}
else
{
System_printf("IP Address & SUBNET MASK NOT AVAILABLE\n");
}

if(1)

{
rc = CfgGetImmediate( 0, CFGTAG_SYSINFO,
CFGITEM_DHCP_DOMAINNAMESERVER,
1, 4, (UINT8 *)&IPTmp );
if(rc == 4)
{
System_printf("networkIPAddrHook:\tIf-%d: DNS = %d.%d.%d.%d\n", IfIdx,
(UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF,
(UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF);
}
else
{
System_printf("networkIPAddrHook: DNS IP Fetch Failed!!\n");
}
}

}

Void someTaskFxn(UArg arg0, UArg arg1)
{

HOSTENT host;
IPN IPTmp;

while(1)

{

System_printf("CfgGetImmediate(DNS) = %d\r\n", CfgGetImmediate( 0, CFGTAG_SYSINFO,
CFGITEM_DHCP_DOMAINNAMESERVER,
1, 4, (UINT8 *)&IPTmp ));
System_printf("DNS IP = %d.%d.%d.%d\n",
(UINT8)(IPTmp)&0xFF, (UINT8)(IPTmp>>8)&0xFF,
(UINT8)(IPTmp>>16)&0xFF, (UINT8)(IPTmp>>24)&0xFF);
Task_sleep(5000);
System_printf("DNSGetHostByName = %d\r\n", DNSGetHostByName("www.google.com", &host, sizeof(host)));

}

Regards

Soumyajit

over 9 years ago

0 Vikram Adiga over 9 years ago

TI__Genius 10825 points

Soumyajit,

This looks similar to e2e.ti.com/.../1903623 question of yours.

I am working on it with our NDK expert. I will get to this question as soon as I finish the other thread of yours.

Vikram

0 Soumyajit Das over 9 years ago in reply to Vikram Adiga

Genius 3340 points

Ok. Thanks.
-
Regards
Soumyajit

0 Vikram Adiga over 9 years ago in reply to Soumyajit Das

TI__Genius 10825 points

I have answered your DNS questions in your other post. e2e.ti.com/.../1905854

Please mark this thread answered if you have all the information you need.

Vikram

0 Soumyajit Das over 9 years ago in reply to Vikram Adiga

Genius 3340 points

Hi Vikram,

With reference to the code posted at the beginning of this thread, can you please check and inform me how I can add the DNS server IP in the configuration so that the NDK can use the DNS. (Note: DHCP is disabled for this mode)

Thanks

Regards

Soumyajit

0 Vikram Adiga over 9 years ago in reply to Soumyajit Das

TI__Genius 10825 points

Hi Soumyajit,

Have you tried calling CfgAddEntry() to set the DNS IP (for no DHCP case) and then calling CfgGetImmediate() to get the entry?

Please look at the other thread for code snippets for these functions. Also, I would recommend using the telnet console code as a reference for configuring NDK at runtime which has code that you can reuse. You can also refer to NDK Programmer's Guide for detailed description about these functions.

Vikram

0 Soumyajit Das over 9 years ago in reply to Vikram Adiga

Genius 3340 points

Hi Vikram,

Thanks for your reply. Yes, I have called CfgAddEntry() to set the DNS IP (DHCP disabled mode) & then called CfgGetimmediate() [please see the post at the beginning of this thread]. But, I don't know why "CfgGetImmediate( 0, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER, 1, 4, (UINT8 *)&IPTmp )" is returning 0.

Can you please tell me any diagnostic procedure or where to or what to look for ahead?

I even tried putting "Dns.externDnsServIp = "192.168.1.5";" in the .cfg file (after rebuilding the NDK) & removing "CfgAddEntry()" in code, but still "CfgGetimmediate()" is returning zero.

Thanks

Regards

Soumyajit

0 Vikram Adiga over 9 years ago in reply to Soumyajit Das

TI__Genius 10825 points

Hi Soumyajit,

I talked to our NDK expert who says the telnet code uses the same API to get the DNS IP. Can you share a test code that can recreate the issue? We can try running it on our set-up.

Vikram

0 Soumyajit Das over 9 years ago in reply to Vikram Adiga

Genius 3340 points

Hi Vikram,

Ok. I'll guide you in setting up the issue for analysis.

1. Open a project in TI RTOS on Tiva C for EK-TM4C1294XL

2. Implement the HTTP Web Server Example following this link

3. In the .cfg file, make sure Ip.autoIp is set to true. (System will change the DHCP to disabled via function "functionNetworkOpenHook", explained later)

4. Add these two lines in the .cfg file: "Global.networkIPAddrHook = "&mynetworkIPAddrHook";" & "Global.networkOpenHook = "&functionNetworkOpenHook";"

5. For the functions "mynetworkIPAddrHook" & "functionNetworkOpenHook", see the attached .c file

6. Declare a new task named "testTaskFxn()" & enable it from the .cfg file. See the attached .c file for the function "testTaskFxn()"

7. Observe whether the system can get the IP of google.com or not (in my observation, "DNSGetHostByName()" was returning 19)

8. After all looks fine, you can declare another task named "tcpOutgoingTaskFxn()" & see whether this task is able to connect to some external IP. This task function is also provided in the attached .c file

9. Also you can observe the console/debug printout of function "DumpRouteTable()".

Regards

Soumyajit

------

Attached ndk.c

2364.ndk.c

0 Vikram Adiga over 9 years ago in reply to Soumyajit Das

TI__Genius 10825 points

HI Soumyajit,

It would have been faster if I had an example that I could build easily. Anyways, I will set-up the code as detailed in your steps and get back to you with my findings.

Vikram

0 Soumyajit Das over 9 years ago in reply to Vikram Adiga

Genius 3340 points

Thanks Vikram. Am waiting to hear from you soon.
-
Regards
Soumyajit

0 Vikram Adiga over 9 years ago in reply to Soumyajit Das

TI__Genius 10825 points

Soumyajit,

I looked at your code and found the issue. If you would like to read your set DNS IP address in networkIPAddr hook function, set the DNS IP address before setting the static IP address. This is because setting IP address would immediately call the networkIPAddr hook to inform addition of an IP.

Here is a snippet of the code:

void netOpenHook()
{
	IPN IPTmp;
	CI_IPNET NA;
	HANDLE hCfgIpAddr;
	HANDLE hCfg;
    int ret;

	hCfg = CfgGetDefault();
	if (!hCfg) {
		System_abort("Couldn't fetch handle\n");
	}

	ret = CfgGetEntryCnt(hCfg, CFGTAG_IPNET, 1);
	System_printf("Static IP count: %d\n", ret);

	/* get the current static IP entry */
	if (CfgGetEntry(hCfg, CFGTAG_IPNET, 1, 1, &hCfgIpAddr)) {
 		/* remove the current static IP entry */
		if (CfgRemoveEntry(hCfg, hCfgIpAddr) < 0) {
			System_abort("Couldn't remove static IP entry\n");
		}
	}
	else {
		System_printf("Couldn't get static IP entry\n");
	}

    // Manually add the DNS server when specified
	IPTmp = inet_addr("192.168.1.5");
	if(IPTmp)
	{
		if(CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,
				0, sizeof(IPTmp), (UINT8 *)&IPTmp, 0 ) < 0) {
			System_abort("Couldn't add static IP entry\n");
     	}

	}
	else {
		System_printf("Couldn't add DNS IP\n");
	}

	/* Setup manual IP address */
	bzero(&NA, sizeof(NA));
	NA.IPAddr  = inet_addr("192.168.1.180");
	NA.IPMask  = inet_addr("255.255.255.0");
	strcpy(NA.Domain, "demo.net");
	NA.NetType = 0;

	/* add a new static IP entry */
	if (CfgAddEntry(hCfg, CFGTAG_IPNET, 1, 0,
				sizeof(CI_IPNET), (UINT8 *)&NA, 0) < 0) {
		System_abort("Couldn't add static IP entry\n");
	}

}

void mynetworkIPAddrHook(IPN IPAddr, uint IfIdx, uint fAdd)
{
    IPN IPTmp;
    CI_IPNET    NA;
    HANDLE hCfg;
	int rc = 0;
    char IPString[16];

	hCfg = CfgGetDefault();

    /* Initialize the IP Address block. */
    bzero (&NA, sizeof(CI_IPNET));

	if(fAdd) {
	    System_printf("networkIPAddrHook: Network Added\n");
	}
	else {
	    System_printf("networkIPAddrHook: Network Removed\n");
	}

    IPTmp = ntohl(IPAddr);
    System_printf("networkIPAddrHook:\tIf-%d:%d.%d.%d.%d\n", IfIdx,
            (UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF,
            (UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF);

    /* Print the IP address information only if one is present. */
    if (CfgGetImmediate(hCfg, CFGTAG_IPNET, 1, 1, sizeof(NA), (UINT8 *)&NA) == sizeof(NA))  {
        /* Yes the device was configured and we got the IP address/Mask */
        NtIPN2Str (NA.IPAddr, IPString);
        System_printf("IP Address: %s\n", IPString);
        NtIPN2Str (NA.IPMask, IPString);
        System_printf("IP Subnet Mask: %s\n", IPString);
    }
    else {
        System_printf("IP Address & SUBNET MASK NOT AVAILABLE\n");
    }

     rc = CfgGetImmediate(hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,
    		 1, 4, (UINT8 *)&IPTmp );
     if (rc == 4) {
        IPTmp = ntohl(IPTmp);
		System_printf("networkIPAddrHook:\tIf-%d: DNS = %d.%d.%d.%d\n", IfIdx,
				(UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF,
				(UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF);
	}
	else {
	    System_printf("networkIPAddrHook: DNS IP Fetch Failed!!\n");
	}

    System_flush();
}

And here is the output that see:

Service Status: DHCPC : Enabled : : 000
Static IP count: 0
Couldn't get static IP entry
Network Added: If-1:192.168.1.180
networkIPAddrHook: Network Added
networkIPAddrHook: If-1:192.168.1.180
IP Address: 192.168.1.180
IP Subnet Mask: 255.255.255.0
networkIPAddrHook: If-1: DNS = 192.168.1.5
Service Status: DHCPC : Enabled : Running : 000

I hope this answers your question.

Vikram

0 Soumyajit Das over 9 years ago in reply to Vikram Adiga

Genius 3340 points

Thanks Vikram, this answers my question.
-
Regards
Soumyajit

Processors

Processors forum

Unable to Set DNS IP