/// <summary>
/// Accepts call.
/// </summary>
/// <param name="sdp">Media answer.</param>
/// <exception cref="ObjectDisposedException">Is raised when this object is disposed and and this method is accessed.</exception>
/// <exception cref="InvalidOperationException">Is raised when call is not in valid state and this method is called.</exception>
/// <exception cref="ArgumentNullException">Is raised when <b>sdp</b> is null reference.</exception>
public void Accept(SDP_Message sdp)
{
if (m_State == SIP_UA_CallState.Disposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
if (m_State != SIP_UA_CallState.WaitingToAccept)
{
throw new InvalidOperationException("Accept method can be called only in 'SIP_UA_CallState.WaitingToAccept' state.");
}
if (sdp == null)
{
throw new ArgumentNullException("sdp");
}
m_pLocalSDP = sdp;
// TODO: We must add Contact header and SDP to response.
SIP_Response response = m_pUA.Stack.CreateResponse(SIP_ResponseCodes.x200_Ok, m_pInitialInviteTransaction.Request, m_pInitialInviteTransaction.Flow);
response.ContentType = "application/sdp";
response.Data = sdp.ToByte();
m_pInitialInviteTransaction.SendResponse(response);
SetState(SIP_UA_CallState.Active);
m_pDialog = m_pUA.Stack.TransactionLayer.GetOrCreateDialog(m_pInitialInviteTransaction, response);
m_pDialog.StateChanged += new EventHandler(m_pDialog_StateChanged);
}
private void toResponse(SIP_RequestReceivedEventArgs e)
{
SIP_Uri uri = e.Request.RequestLine.Uri as SIP_Uri;
try
{
_sdp = SDP_Message.Parse(MyEncoder.Encoder.GetString(e.Request.Data));
RemoteIP = _sdp.Origin.UnicastAddress;
if (_sdp.MediaDescriptions.Count == 0)
{
e.ServerTransaction.SendResponse(_sipServer.Stack.CreateResponse(SIP_ResponseCodes.x400_Bad_Request, e.Request));
return;
}
else
{
RemotePort = _sdp.MediaDescriptions[0].Port;
}
}
catch (Exception)
{
//解析SDP失败。
e.ServerTransaction.SendResponse(_sipServer.Stack.CreateResponse(SIP_ResponseCodes.x400_Bad_Request, e.Request));
return;
}
//send 100 Trying;
e.ServerTransaction.SendResponse(_sipServer.Stack.CreateResponse(SIP_ResponseCodes.x100_Trying, e.Request));
_videoId = _sipServer.DeviceManager.GetVideoId(uri.User);
if (_videoId != null)
{
RTPServer rtp = _sipServer.RTPManager.GetOrAddServer(_videoId);
SDP_Message respSDP = new SDP_Message();
respSDP.Version = "0";
respSDP.Origin = new SDP_Origin(uri.User, 0, 0, "IN", "IPV4", rtp.LocalIP);
respSDP.SessionName = "Play";
respSDP.Connection = new SDP_Connection("IN", "IPV4", rtp.LocalIP);
respSDP.SSRC = SDP_Utils.SSRC2String(SDP_Utils.GenSSRC(uri.User, true)); //根据国标补充协议标准生成SSRC。
respSDP.Times.Add(new SDP_Time(0, 0));
respSDP.MediaDescriptions.Add(new SDP_MediaDescription("video", rtp.Port, 2, "RTP/AVP", new string[] { "96", "97", "98" }));
respSDP.Attributes.Add(new SDP_Attribute("sendonly", ""));
respSDP.Attributes.Add(new SDP_Attribute("rtpmap", "96 PS/90000"));
respSDP.Attributes.Add(new SDP_Attribute("rtpmap", "97 MPEG4/90000"));
respSDP.Attributes.Add(new SDP_Attribute("rtpmap", "98 H264/90000"));
SIP_Response resp = _sipServer.Stack.CreateResponse(SIP_ResponseCodes.x200_Ok, e.Request);
resp.Data = respSDP.ToByte();
e.ServerTransaction.SendResponse(resp);
}
else
{
//没有找到视频源。
e.ServerTransaction.SendResponse(_sipServer.Stack.CreateResponse(SIP_ResponseCodes.x404_Not_Found, e.Request));
}
}
/// <summary>
/// Sends ringing to remote party.
/// </summary>
/// <param name="sdp">Early media answer or early media offer when initial INVITE don't have SDP.</param>
/// <exception cref="ObjectDisposedException">Is raised when this object is disposed and and this method is accessed.</exception>
/// <exception cref="InvalidOperationException">Is raised when call is not in valid state and this method is called.</exception>
public void SendRinging(SDP_Message sdp)
{
if (m_State == SIP_UA_CallState.Disposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
if (m_State != SIP_UA_CallState.WaitingToAccept)
{
throw new InvalidOperationException("Accept method can be called only in 'SIP_UA_CallState.WaitingToAccept' state.");
}
SIP_Response response = m_pUA.Stack.CreateResponse(SIP_ResponseCodes.x180_Ringing, m_pInitialInviteTransaction.Request, m_pInitialInviteTransaction.Flow);
if (sdp != null)
{
response.ContentType = "application/sdp";
response.Data = sdp.ToByte();
m_pLocalSDP = sdp;
}
m_pInitialInviteTransaction.SendResponse(response);
}