mainform.cs

VaxSIPUserAgentSDK

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;



namespace Project
{    
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        public int SND_ASYNC = 0x0001;
        public int SND_NODEFAULT = 0x0002;
        public int SND_LOOP = 0x0008;
        public int SND_FILENAME = 0x00020000;
        
        [DllImport("winmm.dll")]
        private static extern bool PlaySound(string lpszName, int hModule, int dwFlags); 
               
        private void ErrorMessages()
        {

            int nVaxObjectError = VaxSIPUserAgentOCX.GetVaxObjectError();

            switch (nVaxObjectError)
            {
                case 10:
                    MessageBox.Show("You are not Online, please click the 'Online' button first.");
                    break;

                case 11:
                    MessageBox.Show("Cann't open local communication port. Another softphone (x-Ten, x-lite or skype etc) is already running. Please close it first.");
                    break;

                case 12:
                    MessageBox.Show("License Key is not valid.");
                    break;

                case 13:
                    MessageBox.Show("Fail to initialize VaxVoIP task window.");
                    break;

                case 14:
                    MessageBox.Show("Cann't access Input/Mic device or device is already in use.");
                    break;

                case 15:
                    MessageBox.Show("Cann't access Output/Speaker device or device is already in use.");
                    break;

                case 16:
                    MessageBox.Show("Input/Mic device is not open.");
                    break;

                case 17:
                    MessageBox.Show("Output/Speaker device is not open.");
                    break;

                case 18:
                    MessageBox.Show("Your sound device does not support mic volume.");
                    break;

                case 19:
                    MessageBox.Show("Your sound device does not support speaker volume.");
                    break;

                case 20:
                    MessageBox.Show("Recording media initialization fail.");
                    break;

                case 21:
                    MessageBox.Show("Cann't open the wave file.");
                    break;

                case 22:
                    MessageBox.Show("Provided SIP URI is not valid.");
                    break;

                case 23:
                    MessageBox.Show("Codec is not supported.");
                    break;

                case 24:
                    MessageBox.Show("Error to create SDP (Session Description Protocol) request.");
                    break;

                case 25:
                    MessageBox.Show("Error to create CONNECTION request. Please check the provided SIP URI is valid.");
                    break;

                case 26:
                    MessageBox.Show("Error to create REGISTER request. Please check the provided SIP URI is valid.");
                    break;

                case 27:
                    MessageBox.Show("Error to create UN-REGISTER request. Please check the provided SIP URI is valid.");
                    break;

                case 28:
                    MessageBox.Show("Error to create DISCONNECT request.");
                    break;

                case 29:
                    MessageBox.Show("Line No is not valid.");
                    break;

                case 30:
                    MessageBox.Show("Line is already busy.");
                    break;

                case 31:
                    MessageBox.Show("Line is not open.");
                    break;

                case 32:
                    MessageBox.Show("Invalid Call-Id.");
                    break;

                case 33:
                    MessageBox.Show("Provided value is not valid.");
                    break;

                case 34:
                    MessageBox.Show("Selected line is not in voice session.");
                    break;

                case 35:
                    MessageBox.Show("Fail to read wave file.");
                    break;

                case 36:
                    MessageBox.Show("Fail to write wave file.");
                    break;

                case 37:
                    MessageBox.Show("Unsupported wave file format.");
                    break;
            }

        }
        
        private void FillComboBox(int nTotalLine)
        {
            ComboDial.Items.Clear();
            ComboRecord.Items.Clear();
            ComboPlayWave.Items.Clear();
            ComboIncomingCall.Items.Clear();
            ComboTransferCall.Items.Clear();

            for(int nLineNo = 1; nLineNo <= nTotalLine; nLineNo++)
            {
                ComboDial.Items.Add("Line-" + Convert.ToString(nLineNo));
                ComboRecord.Items.Add("Line-" + Convert.ToString(nLineNo));
                ComboPlayWave.Items.Add("Line-" + Convert.ToString(nLineNo));
                ComboIncomingCall.Items.Add("Line-" + Convert.ToString(nLineNo));
                ComboTransferCall.Items.Add("Line-" + Convert.ToString(nLineNo));
            }
                    
            ComboDial.SelectedIndex = 0;
            ComboRecord.SelectedIndex = 0;
            ComboPlayWave.SelectedIndex = 0;
            ComboIncomingCall.SelectedIndex = 0;
            ComboTransferCall.SelectedIndex = 0;

        }
        
        private Boolean InitVaxVoIPObject()
        {
            /********************************************************************
                    Listen Port: default SIP port 5060.
                      SIP Proxy: SIP Proxy IP or FQDN provided by your service provider.
                  OutboundProxy: SIP outbound/NAT proxy IP or FQDN provided by your
                    service provider to use SIP phone behind the NAT.
        
            *********************************************************************/
            
            /****** Constructing SIP From URI for IP Telephony *******/
            string sFromURI = EditLoginId.Text + " <sip:" + EditLoginId.Text + "@" + EditSIPProxy.Text + ">";

            if(EditDisplayName.Text != "")
                sFromURI = EditDisplayName.Text + " <sip:" + EditLoginId.Text + "@" + EditSIPProxy.Text + ">";

            String sMyIP = VaxSIPUserAgentOCX.GetMyIP();
            Boolean bResult = true;

            int nListenPort = 5060;

            for(nListenPort = 5060; nListenPort < 7000; nListenPort++)
            {
                if (!VaxSIPUserAgentOCX.Initialize(false, sMyIP, nListenPort, sFromURI, EditOutBoundProxy.Text, EditSIPProxy.Text, EditLoginId.Text, EditLoginPwd.Text, CheckEnableSoundDevice.Checked, Convert.ToInt32(EditTotalLines.Text)))
                {
                    if(11 != VaxSIPUserAgentOCX.GetVaxObjectError())
                    {
                        bResult = false;
                        
                        ErrorMessages();
                        break;
                    }
                }
                else
                {
                    break;
                }
            }

            if(nListenPort >= 7000)
            {
                MessageBox.Show("Cann't open SIP communication port.");
                bResult = false;
            }

            return bResult;
        }

        private Boolean OpenLines(int nTotalNoOfLine)
        {
            Boolean bResult = true;
            int nListenPort = 7000;
            int nErrorCount = 0;

            String sMyIP = VaxSIPUserAgentOCX.GetMyIP();

            for (int nLineNo = 0; nLineNo < nTotalNoOfLine; nLineNo++)
            {
                if (!VaxSIPUserAgentOCX.OpenLine(nLineNo, false, sMyIP, nListenPort))
                {
                    if (VaxSIPUserAgentOCX.GetVaxObjectError() != 11)
                    {
                        bResult = false;

                        ErrorMessages();
                        break;
                    }
                    else
                    {
                        nErrorCount += 1;
                        nLineNo = nLineNo - 1;
                    }

                }

                nListenPort += 2; //It is importent to increament RTP Listen port by 2

                if (nErrorCount >= (nTotalNoOfLine + 1000)) // If unable to open more than 1000 ports.
                {
                    MessageBox.Show("Unable to open RTP communication port.");
                    bResult = false;
                    break;
                }
            }

            return bResult;
        }

        private void BtnOnline_Click(object sender, EventArgs e)
        {
            if( BtnOnline.Text == "Offline")
            {
                VaxSIPUserAgentOCX.UnInitialize();

                BtnOnline.Text = "Online";
                EditTotalLines.Enabled = true;

                ListViewLineStatus.Items.Clear();
                ListAudioOut.Items.Clear();
                ListAudioIn.Items.Clear();
                
                TimerTick.Enabled = false;
                ProgressTimer.Enabled = false;
                
                SpkProgBar.Value = 0;
                MicProgBar.Value = 0;

                return;
            }
                        
            if( EditLoginId.Text == "")
            {
                MessageBox.Show("Please enter the SIP proxy Login Id.");
                return;
            }

            if( EditSIPProxy.Text == "" )
            {
                MessageBox.Show("Please enter the SIP proxy address or URI.");
                return;
            }

            VaxSIPUserAgentOCX.SetLicenceKey("TRIAL-LICENSE-KEY");
                                
            if(!InitVaxVoIPObject())
                return;
            
            if(!OpenLines(Convert.ToInt32(EditTotalLines.Text)))
                return;

            if (CheckRegisterToProxy.Checked)
            {
                if (!VaxSIPUserAgentOCX.RegisterToProxy(3600))
                {
                    ErrorMessages();
                    return;
                }

                AddToStatusLog("Registering to SIP Proxy.");
            }

            CheckEchoCancel.Checked = true;
            CheckGSM610.Checked = true;
            CheckiLBC.Checked = true;
            CheckG711A.Checked = true;
            CheckG711U.Checked = true;

            VaxSIPUserAgentOCX.EnableKeepAlive(10);
                        
            BtnOnline.Text = "Offline";
            EditTotalLines.Enabled = false;