public void ProcessRequest(SipRequestEvent requestEvent)
{
if (requestEvent.Request.RequestLine.Method == SipMethods.Invite)
{
var inviteTransaction = (SipInviteServerTransaction)_provider.CreateServerTransaction(requestEvent.Request);
var dialog = _provider.CreateServerDialog(inviteTransaction);
/*let the phone of the receiver ring to indicate someone is calling to you+
send back a ringing response to inform to callee, you received the invite*/
WavePlayer player = new WavePlayer(AudioOut.Devices[0]);
player.Play(ResManager.GetStream("ringing.wav"), 10);
var response = CreateRingingResponse(requestEvent.Request);
inviteTransaction.SendResponse(response);
//start timer that does the above untill the dialog state != Early
//the listener is in some state. In this state the callee can answer or cancel the call.
//when it does it goes to another state.
}
else if (requestEvent.Request.RequestLine.Method == SipMethods.Ack &&
requestEvent.Request.CSeq.Command == SipMethods.Invite)
{
/*TODO: */
}
}
/// <summary>
/// Initializes SIP stack.
/// </summary>
private void InitStack()
{
#region Init audio devices
if (AudioOut.Devices.Length == 0)
{
MessageBox.Show("Calling not possible, there are no speakers in computer.", "Error:", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (AudioIn.Devices.Length == 0)
{
MessageBox.Show("Calling not possible, there is no microphone in computer.", "Error:", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
m_pAudioOutDevice = AudioOut.Devices[0];
m_pAudioInDevice = AudioIn.Devices[0];
m_pAudioCodecs = new Dictionary<int, AudioCodec>();
m_pAudioCodecs.Add(0, new PCMU());
m_pAudioCodecs.Add(8, new PCMA());
m_pPlayer = new WavePlayer(AudioOut.Devices[0]);
#endregion
#region Get NAT handling methods
m_pUPnP = new UPnP_NAT_Client();
STUN_Result stunResult = new STUN_Result(STUN_NetType.UdpBlocked, null);
try
{
stunResult = STUN_Client.Query(m_StunServer, 3478, new IPEndPoint(IPAddress.Any, 0));
}
catch
{
}
if (stunResult.NetType == STUN_NetType.Symmetric || stunResult.NetType == STUN_NetType.UdpBlocked)
{
ToolStripMenuItem item_stun = new ToolStripMenuItem("STUN (" + stunResult.NetType + ")");
item_stun.Name = "stun";
item_stun.Enabled = false;
((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems.Add(item_stun);
}
else
{
ToolStripMenuItem item_stun = new ToolStripMenuItem("STUN (" + stunResult.NetType + ")");
item_stun.Name = "stun";
((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems.Add(item_stun);
}
if (m_pUPnP.IsSupported)
{
ToolStripMenuItem item_upnp = new ToolStripMenuItem("UPnP");
item_upnp.Name = "upnp";
((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems.Add(item_upnp);
}
else
{
ToolStripMenuItem item_upnp = new ToolStripMenuItem("UPnP Not Supported");
item_upnp.Name = "upnp";
item_upnp.Enabled = false;
((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems.Add(item_upnp);
}
//if(!((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems["stun"].Enabled && !((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems["upnp"].Enabled){
//MessageBox.Show("Calling may not possible, your firewall or router blocks STUN and doesn't support UPnP.\r\n\r\nSTUN Net Type: " + stunResult.NetType + "\r\n\r\nUPnP Supported: " + m_pUPnP.IsSupported,"Error:",MessageBoxButtons.OK,MessageBoxIcon.Error);
//}
ToolStripMenuItem item_no_nat = new ToolStripMenuItem("No NAT handling");
item_no_nat.Name = "no_nat";
((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems.Add(item_no_nat);
// Select first enabled item.
foreach (ToolStripItem it in ((ToolStripDropDownButton)m_pToolbar.Items["nat"]).DropDownItems)
{
if (it.Enabled)
{
((ToolStripMenuItem)it).Checked = true;
m_NatHandlingType = it.Name;
break;
}
}
#endregion
m_pStack = new SIP_Stack();
m_pStack.UserAgent = "GSDR";
m_pStack.BindInfo = new IPBindInfo[] { new IPBindInfo("", BindInfoProtocol.UDP, IPAddress.Any, m_SipPort) };
//m_pStack.Allow
m_pStack.Error += new EventHandler<ExceptionEventArgs>(m_pStack_Error);
m_pStack.RequestReceived += new EventHandler<SIP_RequestReceivedEventArgs>(m_pStack_RequestReceived);
m_pStack.Start();
if (m_IsDebug)
{
wfrm_SIP_Debug debug = new wfrm_SIP_Debug(m_pStack);
debug.Show();
}
}
