router.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 Client Demo
//--------------------------------------------------------------------------
// Client.c
//
// Stack initialization functions
//
// Author: Michael A. Denio
// Copyright 2000, 2001 by Texas Instruments Inc.
//-------------------------------------------------------------------------
#include <stdio.h>
#include <netmain.h>
#include <_stack.h>
#include <csl.h>
#include "../../../tools/common/console/console.h"
#include "../../../tools/common/servers/servers.h"
#include "router.h"

//---------------------------------------------------------------------------
// Title String
//
char *VerStr = "\nTCP/IP Stack Example Serial to Ethernet Router\n";

// Our NETCTRL callback functions
static void   NetworkOpen();
static void   NetworkClose();
static void   NetworkIPAddr( IPN IPAddr, uint IfIdx, uint fAdd );

// Fun reporting function
static void   ServiceReport( uint Item, uint Status, uint Report, HANDLE hCfgEntry );

//---------------------------------------------------------------------------
// Configuration
//
char *HostName    = "tidsp";
char *LocalIPAddr = "0.0.0.0";          // Set to "0.0.0.0" for DHCP
char *LocalIPMask = "255.255.255.0";    // Not used when using DHCP
char *GatewayIP   = "192.168.0.1";      // Not used when using DHCP
char *DomainName  = "demo.net";         // Not used when using DHCP
char *DNSServer   = "0.0.0.0";          // Used when set to anything but zero

//---------------------------------------------------------------------
// Main Entry Point
//---------------------------------------------------------------------
int main()
{}

//
// Main Thread
//
int StackTest()
{
    int               rc;
    HANDLE            hCfg;
    CI_SERVICE_TELNET telnet;
    CI_SERVICE_HTTP   http;

    //
    // THIS MUST BE THE ABSOLUTE FIRST THING DONE IN AN APPLICATION!!
    //
    rc = NC_SystemOpen( NC_PRIORITY_LOW, NC_OPMODE_INTERRUPT );
    if( rc )
    {
        printf("NC_SystemOpen Failed (%d)\n",rc);
        for(;;);
    }

    // Print a banner
    printf(VerStr);

    // Enable the EDMA interrupt - since the EDMA interrupt
    // is configurable, this one line of code has no home.
    //
    // NOTE: This code is not required for DM642, nor any
    //       driver environment that does not use EMDA sharing.
    //       However, it doesn't hurt to turn it on.
    C62_enableIER( 1<<8 );

    //
    // Create and build the system configuration from scratch.
    //

    // Create a new configuration
    hCfg = CfgNew();
    if( !hCfg )
    {
        printf("Unable to create configuration\n");
        goto main_exit;
    }

    // We better validate the length of the supplied names
    if( strlen( DomainName ) >= CFG_DOMAIN_MAX ||
        strlen( HostName ) >= CFG_HOSTNAME_MAX )
    {
        printf("Names too long\n");
        goto main_exit;
    }

    // Add our global hostname to hCfg (to be claimed in all connected domains)
    CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_HOSTNAME, 0,
                 strlen(HostName), (UINT8 *)HostName, 0 );

    // If the IP address is specified, manually configure IP and Gateway
    if( inet_addr(LocalIPAddr) )
    {
        CI_IPNET NA;
        CI_ROUTE RT;
        IPN      IPTmp;

        // Setup manual IP address
        bzero( &NA, sizeof(NA) );
        NA.IPAddr  = inet_addr(LocalIPAddr);
        NA.IPMask  = inet_addr(LocalIPMask);
        strcpy( NA.Domain, DomainName );
        NA.NetType = 0;

        // Add the address to interface 1
        CfgAddEntry( hCfg, CFGTAG_IPNET, 1, 0,
                           sizeof(CI_IPNET), (UINT8 *)&NA, 0 );

        // Add the default gateway. Since it is the default, the
        // destination address and mask are both zero (we go ahead
        // and show the assignment for clarity).
        bzero( &RT, sizeof(RT) );
        RT.IPDestAddr = 0;
        RT.IPDestMask = 0;
        RT.IPGateAddr = inet_addr(GatewayIP);

        // 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(DNSServer);
        if( IPTmp )
            CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,
                         0, sizeof(IPTmp), (UINT8 *)&IPTmp, 0 );
    }
    // Else we specify DHCP
    else
    {
        CI_SERVICE_DHCPC dhcpc;

        // Specify DHCP Service on IF-1
        bzero( &dhcpc, sizeof(dhcpc) );
        dhcpc.cisargs.Mode   = CIS_FLG_IFIDXVALID;
        dhcpc.cisargs.IfIdx  = 1;
        dhcpc.cisargs.pCbSrv = &ServiceReport;
        CfgAddEntry( hCfg, CFGTAG_SERVICE, CFGITEM_SERVICE_DHCPCLIENT, 0,
                     sizeof(dhcpc), (UINT8 *)&dhcpc, 0 );
    }

    // Specify TELNET service for our Console example
    bzero( &telnet, sizeof(telnet) );
    telnet.cisargs.IPAddr = INADDR_ANY;
    telnet.cisargs.pCbSrv = &ServiceReport;
    telnet.param.MaxCon   = 2;
    telnet.param.Callback = &ConsoleOpen;
    CfgAddEntry( hCfg, CFGTAG_SERVICE, CFGITEM_SERVICE_TELNET, 0,
                 sizeof(telnet), (UINT8 *)&telnet, 0 );

    // Create RAM based WEB files for HTTP
    AddWebFiles();

    // Specify HTTP service
    bzero( &http, sizeof(http) );
    http.cisargs.IPAddr = INADDR_ANY;
    http.cisargs.pCbSrv = &ServiceReport;
    CfgAddEntry( hCfg, CFGTAG_SERVICE, CFGITEM_SERVICE_HTTP, 0,
                 sizeof(http), (UINT8 *)&http, 0 );

    //
    // Configure IPStack/OS Options
    //

    // Enable IP routing
    rc = 1;
    CfgAddEntry( hCfg, CFGTAG_IP, CFGITEM_IP_IPFORWARDING,
                 CFG_ADDMODE_UNIQUE, sizeof(uint), (UINT8 *)&rc, 0 );


    // We don't want to see debug messages less than WARNINGS
    rc = DBG_WARN;
    CfgAddEntry( hCfg, CFGTAG_OS, CFGITEM_OS_DBGPRINTLEVEL,
                 CFG_ADDMODE_UNIQUE, sizeof(uint), (UINT8 *)&rc, 0 );

    //
    // Boot the system using this configuration
    //
    // We keep booting until the function returns 0. This allows
    // us to have a "reboot" command.
    //
    do
    {
        rc = NC_NetStart( hCfg, NetworkOpen, NetworkClose, NetworkIPAddr );
    } while( rc > 0 );

    // Free the WEB files
    RemoveWebFiles();

    // Delete Configuration
    CfgFree( hCfg );

    // Close the OS
main_exit:
    NC_SystemClose();
    return(0);
}

//
// System Task Code
//
static HANDLE hEcho=0,hData=0,hNull=0,hOob=0;
static HANDLE hIo=0;

//
// NetworkOpen
//
// This function is called after the configuration has booted
//
static void NetworkOpen()
{
    // Create our local servers
    hEcho = TaskCreate( echosrv, "EchoSrv", OS_TASKPRINORM, 0x1400, 0, 0, 0 );
    hData = TaskCreate( datasrv, "DataSrv", OS_TASKPRINORM, 0x1400, 0, 0, 0 );
    hNull = TaskCreate( nullsrv, "NullSrv", OS_TASKPRINORM, 0x1400, 0, 0, 0 );
    hOob  = TaskCreate( oobsrv,   "OobSrv", OS_TASKPRINORM, 0x1000, 0, 0, 0 );
    hIo   = TaskCreate( sctrl, "SerialCtrl", OS_TASKPRINORM, 0x1000, 1, 0, 0 );
}

//
// NetworkClose
//
// This function is called when the network is shutting down,
// or when it no longer has any IP addresses assigned to it.
//
static void NetworkClose()
{
    // Close the serial port operation
    sctrlAbort();

    fdCloseSession( hIo );
    fdCloseSession( hOob );
    fdCloseSession( hNull );
    fdCloseSession( hData );
    fdCloseSession( hEcho );

    // Kill any active console
    ConsoleClose();

    // If we opened NETCTRL as NC_PRIORITY_HIGH, we can't
    // kill our task threads until we've given them the
    // opportunity to shutdown. We do this by manually
    // setting our task priority to NC_PRIORITY_LOW.
    TaskSetPri( TaskSelf(), NC_PRIORITY_LOW );

    TaskDestroy( hIo );
    TaskDestroy( hOob );
    TaskDestroy( hNull );
    TaskDestroy( hData );
    TaskDestroy( hEcho );
}

//
// NetworkIPAddr
//
// This function is called whenever an IP address binding is
// added or removed from the system.
//
static void NetworkIPAddr( IPN IPAddr, uint IfIdx, uint fAdd )
{
    IPN IPTmp;

    if( fAdd )
        printf("Network Added: ");
    else
        printf("Network Removed: ");

    // Print a message
    IPTmp = ntohl( IPAddr );
    printf("If-%d:%d.%d.%d.%d\n", IfIdx,
            (UINT8)(IPTmp>>24)&0xFF, (UINT8)(IPTmp>>16)&0xFF,
            (UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF );
}

//
// Service Status Reports
//
// Here's a quick example of using service status updates
//
static char *TaskName[]  = { "Telnet","HTTP","NAT","DHCPS","DHCPC","DNS" };
static char *ReportStr[] = { "","Running","Updated","Complete","Fault" };
static char *StatusStr[] = { "Disabled","Waiting","IPTerm","Failed","Enabled" };
static void ServiceReport( uint Item, uint Status, uint Report, HANDLE h )
{
    printf( "Service Status: %-9s: %-9s: %-9s: %03d\n",
            TaskName[Item-1], StatusStr[Status],
            ReportStr[Report/256], Report&0xFF );

    // Example of adding to the DHCP configuration space
    //
    // When using the DHCP clinent, the client has full control over access
    // to the first 256 entries in the CFGTAG_SYSINFO space. Here, we want to
    // manually add a DNS server to the configuration, but we can only do it
    // once DHCP has finished its programming.
    if( Item == CFGITEM_SERVICE_DHCPCLIENT &&
        Status == CIS_SRV_STATUS_ENABLED &&
        (Report == (NETTOOLS_STAT_RUNNING|DHCPCODE_IPADD) ||
         Report == (NETTOOLS_STAT_RUNNING|DHCPCODE_IPRENEW)) )
    {
        IPN IPTmp;

        // Manually add the DNS server when specified
        IPTmp = inet_addr(DNSServer);
        if( IPTmp )
            CfgAddEntry( 0, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,
                         0, sizeof(IPTmp), (UINT8 *)&IPTmp, 0 );
    }
}