newservers.c

闻停开发板视频程序

//--------------------------------------------------------------------------
// IP Stack Server Demonstration Program
//--------------------------------------------------------------------------
// newservers.c
//
// This module demonstrates the use of the server daemon added in NDK 1.7.
//
// It provides all the functionality of:
//     echosrv() : echosrv.c
//     datasrv() : datasrv.c
//     nullsrv() : nullsrv.c
//     oobsrv()  : oobsrv.c
//
// The original source files are still provided to illustrate a traditional
// server. This file contains only the daemon service task functions
// required when using the server daemon.
//
// Author: Michael A. Denio
// Copyright 2003 by Texas Instruments Inc.
//-------------------------------------------------------------------------
#include <netmain.h>


//
// dtask_tcp_echo() - TCP Echo Server Daemon Function (SOCK_STREAMNC)
// (SOCK_STREAMNC, port 7)
//
// Returns "1" if socket 's' is still open, and "0" if its been closed
//
int dtask_tcp_echo( SOCKET s, UINT32 unused )
{
    struct timeval to;
    int            i;
    char           *pBuf;
    HANDLE         hBuffer;

    (void)unused;

    // Configure our socket timeout to be 5 seconds
    to.tv_sec  = 5;
    to.tv_usec = 0;
    setsockopt( s, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof( to ) );
    setsockopt( s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof( to ) );

    i = 1;
    setsockopt( s, IPPROTO_TCP, TCP_NOPUSH, &i, 4 );

    for(;;)
    {
        i = (int)recvnc( s, (void **)&pBuf, 0, &hBuffer );

        // If we read data, echo it back
        if( i > 0 )
        {
            if( send( s, pBuf, i, 0 ) < 0 )
                break;
            recvncfree( hBuffer );
        }
        // If the connection got an error or disconnect, close
        else
            break;
    }

    fdClose( s );

    // Return "0" since we closed the socket
    return(0);
}



//
// dtask_udp_echo() - UDP Echo Server Daemon Function
// (SOCK_DGRAM, port 7)
//
// Returns "1" if socket 's' is still open, and "0" if its been closed
//
int dtask_udp_echo( SOCKET s, UINT32 unused )
{
    struct sockaddr_in sin1;
    struct timeval     to;
    int                i,tmp;
    char               *pBuf;
    HANDLE             hBuffer;

    (void)unused;

    // Configure our socket timeout to be 3 seconds
    to.tv_sec  = 3;
    to.tv_usec = 0;
    setsockopt( s, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof( to ) );
    setsockopt( s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof( to ) );

    for(;;)
    {
        tmp = sizeof( sin1 );
        i = (int)recvncfrom( s, (void **)&pBuf, 0, &sin1, &tmp, &hBuffer );

        // Spit any data back out
        if( i >= 0 )
        {
            sendto( s, pBuf, i, 0, &sin1, sizeof(sin1) );
            recvncfree( hBuffer );
        }
        else
            break;
    }

    // Since the socket is still open, return "1"
    // (we need to leave UDP sockets open)
    return(1);
}



//
// dtask_tcp_datasrv() - TCP Data Server Daemon Function
// (SOCK_STREAM, port 1000)
//
// Returns "1" if socket 's' is still open, and "0" if its been closed
//
int dtask_tcp_datasrv( SOCKET s, UINT32 unused )
{
    struct timeval to;
    int            i,size;

    (void)unused;

    // Configure our socket timeout to be 5 seconds
    to.tv_sec  = 5;
    to.tv_usec = 0;
    setsockopt( s, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof( to ) );
    setsockopt( s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof( to ) );

    i = 1;
    setsockopt( s, IPPROTO_TCP, TCP_NOPUSH, &i, 4 );

    for(;;)
    {
        // There is data available on the active connection
        i = (int)recv( s, (char *)&size, sizeof(int), 0 );

        if( i==sizeof(int) )
        {
            if( send( s, (char *)&size, size, 0 ) < 0 )
                break;
        }
        else
            break;
    }

    // Note in dtask_tcp_echo() we close the socket at this
    // point. Here we'll leave it open to test the daemon.

    // Return "1" since the socket is still open
    return(1);
}



//
// dtask_tcp_nullsrv() - TCP Data Server Daemon Function
// (SOCK_STREAMNC, port 1001)
//
// Returns "1" if socket 's' is still open, and "0" if its been closed
//
int dtask_tcp_nullsrv( SOCKET s, UINT32 unused )
{
    struct timeval to;
    int            i;
    char           *pBuf;
    HANDLE         hBuffer;

    (void)unused;

    // Configure our socket timeout to be 5 seconds
    to.tv_sec  = 5;
    to.tv_usec = 0;
    setsockopt( s, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof( to ) );
    setsockopt( s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof( to ) );

    for(;;)
    {
        // There is data available on the active connection
        i = (int)recvnc( s, (void **)&pBuf, 0, &hBuffer );

        // If the connection is closed or got an error, close
        if( i <= 0 )
            break;
        else
            recvncfree( hBuffer );
    }

    // Note in dtask_tcp_echo() we close the socket at this
    // point. Here we'll leave it open to test the daemon.

    // Return "1" since the socket is still open
    return(1);
}



//
// dtask_tcp_oobsrv() - TCP Data Server Daemon Function
// (SOCK_STREAMNC. port 999)
//
// Returns "1" if socket 's' is still open, and "0" if its been closed
//
int dtask_tcp_oobsrv( SOCKET s, UINT32 unused )
{
    struct timeval to;
    int            i;
    char           buf[16];

    (void)unused;

    // Configure our socket timeout to be 5 seconds
    to.tv_sec  = 5;
    to.tv_usec = 0;
    setsockopt( s, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof( to ) );
    setsockopt( s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof( to ) );

    //
    // OOB Data Test
    // Will send 10 bytes of data, 1 OOB, and then 10 more data
    // Client shoud read as
    //    10 bytes (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
    //    1  byte  (99)
    //    10 bytes (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
    //
    for(i=0; i<10; i++)
        buf[i] = i;
    buf[10] = 99;
    send( s, buf, 11, MSG_OOB );
    send( s, buf, 10, 0 );

    fdClose( s );

    // Return "0" since we closed the socket
    return(0);
}