Hello,
I have been trying to set up a DNS client on EK-TM4C1294XL for a week now. I have recompiled NDK to support everything and tried seemingly every possible combination of the NDK modules.
I use a DHCP client to get my IP, which works well. I have successfully connected to a secure server using wolfSSL via a hardcoded IP address and I can ping my device on the local network. The only problem I have is that DNSGetHostByName() always returns NODNSREPLY (19). Although I have spent countless hours trying to find a solution or even example code to verify against, I have so far come up with nothing and am slowly getting desperate.
Below is my .cfg file, excerpts of the code I use and the Global Service Report output:
NOTE that my config file has gone through numerous changes over the past week.
/* ================ General configuration ================ */
var Defaults = xdc.useModule('xdc.runtime.Defaults');
var Diags = xdc.useModule('xdc.runtime.Diags');
var Error = xdc.useModule('xdc.runtime.Error');
var Log = xdc.useModule('xdc.runtime.Log');
var Main = xdc.useModule('xdc.runtime.Main');
var Memory = xdc.useModule('xdc.runtime.Memory');
var System = xdc.useModule('xdc.runtime.System');
var Text = xdc.useModule('xdc.runtime.Text');
var BIOS = xdc.useModule('ti.sysbios.BIOS');
var Clock = xdc.useModule('ti.sysbios.knl.Clock');
var Task = xdc.useModule('ti.sysbios.knl.Task');
var Semaphore = xdc.useModule('ti.sysbios.knl.Semaphore');
var Hwi = xdc.useModule('ti.sysbios.hal.Hwi');
var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
var Global = xdc.useModule('ti.ndk.config.Global');
var Tcp = xdc.useModule('ti.ndk.config.Tcp');
var Ip = xdc.useModule('ti.ndk.config.Ip');
var Emac = xdc.useModule('ti.ndk.config.Emac');
var Udp = xdc.useModule('ti.ndk.config.Udp');
var Dns = xdc.useModule('ti.ndk.config.Dns');
var DhcpClient = xdc.useModule('ti.ndk.config.DhcpClient');
Global.enableCodeGeneration = true;
// Global.enableCodeGeneration = {true or false};
/*
* Program.stack is ignored with IAR. Use the project options in
* IAR Embedded Workbench to alter the system stack size.
*/
if (!Program.build.target.$name.match(/iar/)) {
/*
* Reducing the system stack size (used by ISRs and Swis) to reduce
* RAM usage.
*/
Program.stack = 2048;
}
/* ================ System configuration ================ */
var SysMin = xdc.useModule('xdc.runtime.SysMin');
System.SupportProxy = SysMin;
/* Enable Semihosting for GNU targets to print to CCS console */
if (Program.build.target.$name.match(/gnu/)) {
var SemiHost = xdc.useModule('ti.sysbios.rts.gnu.SemiHostSupport');
}
/* ================ Logging configuration ================ */
var LoggingSetup = xdc.useModule('ti.uia.sysbios.LoggingSetup');
/* ================ Kernel configuration ================ */
/* Use Custom library */
var BIOS = xdc.useModule('ti.sysbios.BIOS');
BIOS.libType = BIOS.LibType_Instrumented;
BIOS.logsEnabled = true;
BIOS.assertsEnabled = true;
var task0Params = new Task.Params();
task0Params.instance.name = "heartBeat";
task0Params.arg0 = 1000;
task0Params.stackSize = 512;
Program.global.heartBeatTask = Task.create("&heartBeatFxn", task0Params);
/* ================ Driver configuration ================ */
var TIRTOS = xdc.useModule('ti.tirtos.TIRTOS');
TIRTOS.useGPIO = true;
BIOS.heapSize = 90112;
Global.networkIPAddrHook = "&netIPAddrHook";
Global.stackLibType = Global.PPP_PPPOE;
Global.IPv6 = false;
TIRTOS.libType = TIRTOS.LibType_Instrumented;
Ip.DHCPOPT_NAME_SERVERS = true;
Udp.receiveBufSize = 4096;
Ip.ResolveIP = false;
Ip.dhcpClientMode = 9;
Dns.externDnsServIp = "192.168.8.1";
Ip.IfIdXValid = true;
Ip.mask = "255.255.255.0";
Ip.enableForwarding = true;
Ip.enableFiltering = true;
Ip.RestartIPTerm = true;
void getServerIPTask(UArg arg0, UArg arg1)
{
while (1) {
uint8_t ret = DNSGetHostByName("www.google.com", &host, sizeof(host)); // HOSTENT host is defined globally
System_printf("RET %d\n", ret);
System_flush();
Task_sleep(1000);
}
}
/*
* ======== netIPAddrHook ========
* This function is called when IP Addr is added/deleted
*/
void netIPAddrHook(unsigned int IPAddr, unsigned int IfIdx, unsigned int fAdd)
{
static Task_Handle taskHandle;
Task_Params taskParams;
Error_Block eb;
if (fAdd && !taskHandle) {
Error_init(&eb);
Task_Params_init(&taskParams);
taskParams.stackSize = HTTPTASKSTACKSIZE;
taskParams.priority = 7;
taskHandle = Task_create((Task_FuncPtr)getServerIPTask, &taskParams, &eb);
if (taskHandle == NULL) {
printError("netIPAddrHook: Failed to create HTTP Task\n", -1);
}
}
}
/*
* ======== main ========
*/
int main(void)
{
/* Call board init functions */
Board_initGeneral();
Board_initEMAC();
Board_initGPIO();
/* Turn on user LED */
GPIO_write(Board_LED0, Board_LED_ON);
System_printf("Starting the example\nSystem provider is set to SysMin. "
"Halt the target to view any SysMin contents in ROV.\n");
/* SysMin will only print to the console when you call flush or exit */
System_flush();
/* Start BIOS */
BIOS_start();
return (0);
}
The auto generated Service Report code should start the DNS client when an IP address is assgined:
Void ti_ndk_config_Global_serviceReport(uint Item, uint Status,
uint Report, HANDLE h)
{
xdc_runtime_System_printf("Service Status: %-9s: %-9s: %-9s: %03d\n",
TaskName[Item-1], StatusStr[Status],
ReportStr[Report/256], Report&0xFF);
if (Item == CFGITEM_SERVICE_DHCPCLIENT &&
Status == CIS_SRV_STATUS_ENABLED &&
(Report == (NETTOOLS_STAT_RUNNING|DHCPCODE_IPADD) ||
Report == (NETTOOLS_STAT_RUNNING|DHCPCODE_IPRENEW)) ) {
/* add the external DNS server to the configuration. */
ti_ndk_config_external_dns_init(h);
}
xdc_runtime_System_flush();
}
And the Service Report's output:
Using MAC address in flash Starting the example System provider is set to SysMin. Halt the target to view any SysMin contents in ROV. Service Status: DHCPC : Enabled : : 000 Service Status: DHCPC : Enabled : Running : 000 Network Added: If-1:192.168.8.108 RET 19 Service Status: DHCPC : Enabled : Running : 017 RET 19 RET 19 RET 19 RET 19 RET 19
Regards,
Jaan
