sctrl.c

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/*
 *  Copyright 2006 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *
 *  @(#) TCP/IP_Network_Developers_Kit 1.91.00.08 08-22-2006 (ndk-a08)
 */
//--------------------------------------------------------------------------
// IP Stack Server Demonstration Program
//--------------------------------------------------------------------------
// SCTRL.C
//
// This module is where serial port characters go before a connection
// has been established. It is in charge of launching the HDLC client
// or server.
//
// Author: Michael A. Denio
// Copyright 1999, 2001 by Texas Instruments Inc.
//--------------------------------------------------------------------------
#include <netmain.h>
#include <_stack.h>
#include "../../../tools/common/hdlc/hdlcif.h"

#define OUTMAX  128

static char   OutBuf[OUTMAX];
static int    OutCnt   = 0;
static HANDLE hOurSem  = 0;
static uint   fRunning = 0;

//
// This function is called from the serial port drvier to service
// a character
//
static void sioInputChar(char c)
{
    // If we're running, add character to buffer and wake task
    if( hOurSem )
    {
        if( OutCnt < OUTMAX )
            OutBuf[OutCnt++] = c;

        // Post to our task semaphore
        SemPost( hOurSem );
    }
}

//
//  sctrlAbort()
//
//  Abort Serial Port Control Function
//
sctrlAbort()
{
    fRunning = 0;
    SemPost( hOurSem );
}

//
//  sctrl()
//
//  Serial Port Control Function
//
void sctrl( uint DevSerial )
{
    uint    status      = 0;
    uint    fConnectMsg = 0;
    uint    fInput      = 0;
    HANDLE  hHDLC       = 0;
    CI_ACCT CA;

    hOurSem = SemCreate( 0 );
    if( !hOurSem )
        goto Exit;

    fRunning = 1;

    // HAL functions without leading underscore '_' must be
    // called from within a llEnter()/llExit() pairing.
    llEnter();

    // Setup the serial port driver
    llSerialConfig( 1, 115200,
                    HAL_SERIAL_MODE_8N1, HAL_SERIAL_FLOWCTRL_NONE );

    // Open the serial port driver for basic IO
    llSerialOpen( 1, &sioInputChar );

    llExit();

    //
    // Add a test account to the configuration. For the test, use
    // Username = "username" and Password = "password". These are
    // the values the CLIENT example will use.
    //
    strcpy( CA.Username, "username" );
    strcpy( CA.Password, "password" );
    CA.Flags = CFG_ACCTFLG_CH1;
    CfgAddEntry( 0, CFGTAG_ACCT, CFGITEM_ACCT_PPP,
                 CFG_ADDMODE_NOSAVE, sizeof(CI_ACCT),
                 (UINT8 *)&CA, 0 );

    printf("SCtrl: Ready\n");

    while(1)
    {
        SemPend( hOurSem, 1000 );

        // See if we're still running
        if( !fRunning )
        {
            llEnter();
            llSerialClose(1);
            llExit();
            goto Exit;
        }

        //------------------------------
        // Read character from buffer
        // OutBuf = Start of characters to read
        // OutCnt = Number of characters to read
        //------------------------------

        // In this example program, we don't examine input
        // for the serial port. This would be where a modem
        // state machine would be placed. Here, we simply
        // flag that we got some serial data input, then
        // immediately launch the HDLC server session.
        fInput = OutCnt;
        OutCnt = 0;

        //
        // If we don't have an active HDLC session, and we have got
        // serial port activity, we launch a new HDLC session.
        //
        if( !hHDLC && fInput )
        {
            printf("SCtrl: Launching Server\n");

            // Send a string to the client to wake it up
            _llSerialSend( 1, (UINT8 *)"CLIENTSERVER", 12 );

            //
            // NOTE: In this demo we specify a server IP address of
            //       1.2.1.1, a netmask of 255.255.255.0, and a
            //       client IP address of 1.2.1.2 . Normally, these
            //       would be application configurable values.
            //
            hHDLC = hdlcsNew( 1, PPPFLG_SERVER | PPPFLG_OPT_USE_MSE |
                                 PPPFLG_OPT_AUTH_PAP | PPPFLG_CH1 |
                                 PPPFLG_SIOPT_SENDCMAP | PPPFLG_SIOPT_RECVCMAP,
                                 0, htonl(0x01020101), htonl(0xffffff00),
                                 htonl(0x01020102) );
        }

        // If we have an active HDLC session, get the status
        if( hHDLC )
        {
            status = hdlcsGetStatus( hHDLC );

            // If disconnected, print message and close
            if( status >= SI_CSTATUS_DISCONNECT )
            {
                printf("SCtrl: Disconnected\n");
                hdlcsFree( hHDLC );
                hHDLC = 0;
                fConnectMsg = 0;
            }
            // Else if connected, print message
            else if( status == SI_CSTATUS_CONNECTED && !fConnectMsg )
            {
                printf("SCtrl: Connected\n");
                fConnectMsg = 1;
            }
        }
    }

Exit:
    //
    // General Cleanup
    //
    if( hHDLC )
        hdlcsFree( hHDLC );
    if( hOurSem )
        SemDelete( hOurSem );
    printf("SCtrl: Exit\n");

    // This task is killed by the system - here, we block
    TaskBlock( TaskSelf() );
}