Linux UDP Port Test

http://sourceforge.net/projects/sendudp/?source=typ_redirect
sendup.cpp

/*
 *
 * Name: sendudp
 * Version: 1.1
 * Owner: Ahmed Jolani "[email protected]"
 * Contributors: 
 	1- Dan Milligan "[email protected]" (HandleCommandLineOptions, makefile, bash script for testing)
 * License: Commons Attribution 3.0 License (CC3)
 * Description: sendudp is a tool that allow you to test any UDP port, sendudp doesn't
 * guarantee the delivery of the sent packets, it only send the packets for you to test your
 * UDP application/software. Feel free to contribute to this tool and enhance it, please
 * email me with any contribution to keep me updated.
 *
 */

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/types.h>
#include <errno.h>
#include <time.h>

using namespace std;

const char *VERSION_STRING = "1.1";

const char *s_commandOptions = "d:p:m:v"; // d = destination, p = port, m = message, v = print version
char remoteIpAddr[INET6_ADDRSTRLEN];
char remotePort[8];
char *messageToSend = NULL;

void msg(char * argv)
{
	cout << "Usage [" << argv << "]: UDP connection tester." << endl;
	cout << "sendudp -d {IPv4/IPv6} -p PORT -m {MESSAGE TO SEND}" << endl;
}

bool HandleCommandLineOptions(int argc, char * argv[])
{
  bool success = true; // assume the best
  int commandId;

  bool hasIp = false;
  bool hasPort = false;
  bool hasMessage = false;

  // const char *s_commandOptions = "d:p:m:v"; // d = destination, p = port, m = message, v = print version
  cout << "Parsing command line options" << endl;

  while ((commandId = getopt(argc, argv, s_commandOptions)) != -1)
  {
    switch (commandId)
    {
      case 'd':
      {
        memcpy(remoteIpAddr, optarg, strlen(optarg));
        cout << "Sending to remote ip address: " << optarg << endl;
        hasIp = true;
      }
      break;

      case 'p':
      {
        memcpy(remotePort, optarg, strlen(optarg));
        remotePort[strlen(optarg)] = '\0';
        cout << "Sending to remote port number: " << remotePort << endl;
        hasPort = true;
      }
      break;

      case 'm':
      {
        messageToSend = new char[strlen(optarg) + 1];
        sprintf(messageToSend, "%s
", optarg);
        hasMessage = true;
      }
      break;

      case 'v':
      {
        cout << "You are running version: " << VERSION_STRING << endl;
      }
      break;

      default:
      {
        success = false;
      }
      break;
    }
  }

  // If any one of these has not been set then no go
  if ((hasIp != true) || (hasPort != true) || (hasMessage != true))
  {
    success = false;
  }
  return success;
}

int main(int argc, char * argv[])
{
  if (HandleCommandLineOptions(argc, argv) == true)
  {
    cout << "Sending message to: " << remoteIpAddr << " using port: " << remotePort << endl;

    struct addrinfo hints;
    struct addrinfo *response;

    memset(&hints, 0, sizeof hints);
    hints.ai_socktype = SOCK_DGRAM;
    hints.ai_family = AF_UNSPEC;

    if (getaddrinfo(remoteIpAddr, remotePort, &hints, &response) == 0)
    {
      int socket_fd = -1;
      struct addrinfo *target = NULL;

      for (struct addrinfo *ptr = response; ptr != NULL; ptr = ptr->ai_next)
      {
        if ((socket_fd = socket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol)) == -1)
        {
          continue;
        }
        target = ptr;
        break;
      }
      freeaddrinfo(response);

      if ((socket_fd != -1) && (target != NULL))
      {
	  int bytesSent = sendto(socket_fd, messageToSend, strlen(messageToSend), 0, target->ai_addr, target->ai_addrlen);

          if (bytesSent == strlen(messageToSend))
          {
            cout << "Sent message successfully!" << endl;
          }
      }
      else
      {
        cout << "Failed to open socket." << endl;
      }
    }
    else
    {
      cout << "Failed to get address information." << endl;
    }
  }
  else
  {
    msg(argv[0]);
  }

  if (messageToSend != NULL)
  {
    delete [] messageToSend;
  }
  return 0;
}

Makefile:

#
# (C) Copyright 2012-2013
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundatio; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#

VERSION = 1
PATCHLEVEL = 01
SUBLEVEL = 01
EXTRAVERSION =
ARCH = ARMc

ifeq ($(ARCH), ARM)
-include /usr/local/ti-sdk-am335x-evm/Rules.make
CC=$(CROSS_COMPILE)g++
else
CC=/usr/bin/g++
endif

sendudp: sendudp.o
	$(CC) -o sendudp sendudp.o

sendudp.o : sendudp.cpp
	$(CC) -c sendudp.cpp

clean:
	rm -f sendudp
	rm -f sendudp.o

test.sh

#!/bin/bash

./sendudp -d 224.0.0.1 -p 8888 -m testing