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(); } }