MSP432E401Y: how to enable telnet function

Sorry, forgot your actual questions!
The IP address is the address of the MSP432 board - most projects choose Use DHCP in the "NDK Interface" tab of the sys config tool, but you can pick a fixed IP address there too.
The TCP port for Telnet defaults to 23, but a different value can be selected in the Telnet options tab of sys cfg.

Hi Jim,

How can I get the telnet callback function? Is there any demo?

Thanks

If you mean the service report callback, I just tweaked the one from the other TCP demos:

/** @brief Service report callback.
 *
 * May be set as the callback for various network config operation that are defined in the GUI.
 */
void serviceReport(uint32_t item, uint32_t status, uint32_t report, void *h)
{
  static char *taskName[] = {"Telnet", "", "NAT", "DHCPS", "DHCPC", "DNS"};
  static char *reportStr[] = {"", "Running", "Updated", "Complete", "Fault"};
  static char *statusStr[] = {"Disabled", "Waiting", "IPTerm", "Failed","Enabled"};

  Display_printf(display, 0, 0, "Service Status: %-9s: %-9s: %-9s: %03d\n",
                 taskName[item - 1], statusStr[status], reportStr[report / 256],
                 report & 0xFF);

  /* report common system issues */
  if ((item == CFGITEM_SERVICE_DHCPCLIENT) &&
      (status == CIS_SRV_STATUS_ENABLED) &&
      (report & NETTOOLS_STAT_FAULT))

  {
    Display_printf(display, 0, 0, "DHCP Client initialization failed; check your network.\n");
    while (1);
  }
}

Hi Jim,

It seems that the PC can link to device successfully but the device cannot enable Telnet service. I enter ”telnet 192.168.1.100 1000“ in Wndows Terminal like picture_1. 

After hitting Enter key, it becoms shown in picture_2. 

Throughout the process, I used WireShark tools to capture packets and the result is shown as picture_3. Please help to check it.

My PC IP is 192.168.1.20 and the device IP is 192.168.1.100. The Telnet port number is 1000.

Thanks~

I only ever tried connecting with putty, so I'm not sure.
When you say that the Telnet port is 1000, I assume that means you changed the default from 23 using the Telnet setting in the syscfg GUI!
Should be OK but I only ever used the default.
Have you seen the service report function state that Telnet has started on the Launchpad?

Hi Jim,

I change the Telnet port in a file name tcpEchoHooks.c like below. I don't use syscfg GUI.

There is not any log from the UART console when doing Telnet linking.

Thanks

Ah, I can see why you might expect that to work, however:

Many of the sample projects use netIPAddrHook() to start a network task, with a hard coded port number, when an IP address has first been assigned.

Telnet is a service, so is started differently. When you check Telnet in the syscfg GUI, the following code is added to the generated code file ti_ndk_config.c. Here, the port number (telnet.param.Port = 23;) is generated according to the port parameter from the GUI Telnet settings.

/*
* ======== ti_ndk_config_telnet_init ========
* Configure and initialize Telnet server(s)
*/
extern SOCKET ConsoleOpen(struct sockaddr *pSinClient);

static void ti_ndk_config_telnet_init(void *hCfg)
{
    CI_SERVICE_TELNET telnet;

    /* Specify Telnet service for Telnet instance: CONFIG_TELNETS_0 */
    /* NOTE! The application must provide the service report function matching this prototype! */

    extern void serviceReport(uint32_t item, uint32_t status,
    uint32_t report, void *h);

    memset(&telnet, 0, sizeof(telnet));
    telnet.cisargs.Mode = CIS_FLG_CALLBYIP;
    telnet.cisargs.IPAddr = inet_addr("0.0.0.0");
    telnet.cisargs.pCbSrv = serviceReport;
    telnet.param.MaxCon = 8;
    telnet.param.Port = 23;
    telnet.param.Callback = &ConsoleOpen;

    CfgAddEntry(hCfg, CFGTAG_SERVICE, CFGITEM_SERVICE_TELNET, 0, sizeof(telnet), (unsigned char *)&telnet, 0);
}

If you edit this, it will get overwritten but I would recommend sticking with 23, at least until you get something working.

If you have added the service report function to the Telnet setting (like the sample I posted yesterday), you should get some message about Telnet (enabled or failed). Until it reports "enabled", you are not going to be able to connect.

Best regards
Jim

Hi Jim,

I will try as described above later and feedback the results.

Thanks a lot！

Hi Jim,

Is there any reference for ConsoleOpen() function?

Thanks~

I couldn't see any documentation !
The example uses the library function in C:\ti\simplelink_msp432e4_sdk_4_20_00_12\source\ti\ndk\tools\console\console.c

The top of the function only has a basic comment:

/*--------------------------------------------------------------------- */
/* ConsoleOpen() */
/* Launch a console connection to the specified client */
/* Returns local socket, or INVALID_SOCKET on error */
/*--------------------------------------------------------------------- */
SOCKET ConsoleOpen( struct sockaddr *pClient )

So I think that's it!