Ping2.c

Ping2.c example details

This Application initiates a ping request to address 192.168.168.111. Change line

send_ping_request ("192.168.168.111");

in main() to use another address. If the network setting and the connection is right, the pings should be answered and the DSP prints the reply time.

Since ICMP is a basic and very simple protocol, net_send() and net_recv() do not support this protocol level. Instead RAW-IP is used to send out the ICMP request. The ICMP checksum must be generated first:

//**************************************************************************
// calculate checksum
//**************************************************************************
chk = get_checksum (dp, 40);
dp[2] = chk & 0xff; // ICMP checksum
dp[3] = (chk>>8) & 0xff; // ICMP checksum
//**************************************************************************
// send ICMP message; send length MUST not exceed 1500 bytes
//**************************************************************************
send_ip (icmp_so, &(arp -> addr), 40, ++ip_id);
See also
ICMP Internet Control Message Protocol
/***************************************************************************//**
@file Ping2.c
@brief Initiate ping request
@verbatim
_ _ _
__| | ___(_) ____ _ __ | |_
/ _` | / __| |/ _` | '_ \| __|
| (_| | _ \__ \ | (_| | | | | |_
\__,_|(_) ___/_|\__, |_| |_|\__|
Signalprocessing |___/ Technology
@endverbatim
@author D.SignT GmbH & Co. KG, Claus Hermbusche
@date 2019-06-03
@anchor PING2EX
@cond Software License Agreement
Copyright (C) 2001-2019 D.SignT GmbH & Co. KG - http://www.dsignt.de
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the
distribution.
Neither the name of D.SignT GmbH & Co. KG nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
Disclaimer
THIS SOFTWARE IS PROVIDED BY D.SIGNT GMBH & CO. KG "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL D.SIGNT GMBH & CO. KG BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@endcond
*******************************************************************************/
/*******************************************************************************
include stdtypes.h to avoid data type mismatch
*******************************************************************************/
#include <BoardSupport/inc/stdtypes.h>
/*******************************************************************************
include Runtime Source
*******************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <inttypes.h>
#include <time.h>
#include <string.h>
/*******************************************************************************
network support functions
*******************************************************************************/
#include <Libs/NETlib/net.h> /* D.Module network support */
/*******************************************************************************
board specific functions
*******************************************************************************/
#include <BoardSupport/inc/BoardSpecific.h> /* board support functions */
/*******************************************************************************
common support functions
*******************************************************************************/
#include <Common/Common.h> /* on exit function */
// #include <Common/uartio.h> /* UART support */
#include <Common/timer.h> /* timer setting */
#include <Common/CPrintf.h> /* CPrintf defines */
/*******************************************************************************
network configuration
*******************************************************************************/
#include <BoardSupport/config/netconfig.c> /* network configuration */
#include "ICMP.h"
#ifdef __cplusplus
extern "C" {
#endif /* !__cplusplus */
/*******************************************************************************
local prototypes
*******************************************************************************/
#ifdef __cplusplus
} // extern "C"
#endif
/*******************************************************************************
* *
* DEFINES *
* *
*******************************************************************************/
/*******************************************************************************
* *
* GLOBALS *
* *
*******************************************************************************/
/*******************************************************************************
program name
*******************************************************************************/
char *program_name = "Ping2";
/*******************************************************************************
target IP address to ping
*******************************************************************************/
char target_ip[16] = "192.168.168.111";
/*******************************************************************************
* *
* FUNCTIONS *
* *
*******************************************************************************/
/*******************************************************************************
@brief Main application
@param -
@return never
*******************************************************************************/
#pragma CODE_SECTION(main , ".commontext");
int main (void)
{
/***************************************************************************
locals
***************************************************************************/
int main_loop = 1; /* main loop switch, set to 0 to exit */
timeval stamp1, stamp2, delta; /* used to determine startup time */
timeval TriggerTimer;
/***************************************************************************
initialize application (e.g. timer clocks, PLL settings, EMIF etc.)
(ref. \Common\Common.c)
***************************************************************************/
AppInit (GET_CLOCK);
/***************************************************************************
select output device for CPrintf (ref. \Common\cprintf.c)
possible settings:
CPRINTF_UART_OUTPUT -> output to UART
CPRINTF_CCS_OUTPUT -> output to CCS
CPRINTF_UART_OUTPUT | CPRINTF_CCS_OUTPUT -> output to UART and CCS
***************************************************************************/
CPrintf_select_output (CPRINTF_DEFAULT_OUTPUT); /* default outputs */
/***************************************************************************
print a start up message
***************************************************************************/
START_UP_MESSAGE (BLANK_REV NETLIB_REV);
/**************************************************************************/
// CPrintfProgress (" Heap check ");
// at least 0x2000 bytes required for this app
/**************************************************************************/
ASSERT_HEAP (initial_heap_size, 0x2000);
// CPrintfProgressSuccess();
/**************************************************************************/
CPrintfProgress (" Setup system time ");
// 1 milli seconds resolution
/**************************************************************************/
SetupSystemTime ( SYSTEM_TIMER_INT, SYSTEM_TIMER, RES_MSECONDS);
CPrintfProgressSuccess();
CPrintf (" *** timer %d mapped to CPU int %d ***\r\n",
SystemTimerDev, SYSTEM_TIMER_INT);
/**************************************************************************/
CPrintfProgress (" Enable interrupts ");
/**************************************************************************/
BoardEnableInterrupts();
CPrintfProgressSuccess();
/**************************************************************************/
CPrintfProgress (" Start system timer ");
/**************************************************************************/
StartSystemTimer ();
CPrintfProgressSuccess();
CPrintf (" *** timer %d running at %"PRId32" Hz ***\r\n", SystemTimerDev, RES_SECONDS/GetSystemTimerRes());
/***************************************************************************
measure network initialization time
***************************************************************************/
stamp1 = GetTimeStamp();
/**************************************************************************/
CPrintfProgress (" Initialize network ");
/**************************************************************************/
InitializeNetwork ( 64); // 64 bytes for ping
/***************************************************************************
define callback function for received TCP packets
***************************************************************************/
socket_define_callback (icmp_so, icmp_msg, socket_get_data_pointer(icmp_so), MAX_PING_DATA);
CPrintfProgressSuccess();
stamp2 = GetTimeStamp();
tv_interval (&delta, &stamp1, &stamp2);
CPuts (" network startup time [sec]: ");
CPrintf (VT100_RED
"%"PRId32".%03"PRId32"\r\n"
VT100_DEFAULT,
delta.tv_sec,
delta.tv_usec/1000);
LED_on (0);
TriggerTimer = GetTimeStamp();
/***************************************************************************
main program loop: set main_loop to 0 to exit loop
***************************************************************************/
CPuts ("\r\n Entering main loop ...\r\n");
while ( main_loop )
{
/***********************************************************************
process net_isq()
***********************************************************************/
net_isq (); // process ISQ
/***********************************************************************
monitor link status
***********************************************************************/
monitor_link_status (CPrintf);
/***********************************************************************
try to detect IP assignment
if DHCP is used, the assigned IP address may change
***********************************************************************/
monitor_ip_address (CPrintf);
/***********************************************************************
a ping request only makes sense when a link is established
***********************************************************************/
if (_link && get_ip_address (0))
{
/*******************************************************************
toggle LEDs
*******************************************************************/
LED_toggle(0);
LED_toggle(1);
if ( tv_elapsed (&TriggerTimer, 1, 0, TRUE) )
{
send_ping_request (target_ip);
}
}
}
/***************************************************************************
exit program, shut down peripherals
***************************************************************************/
return (0);
}