private static SipResponse CreateDefaultResponse(SipMessage packet)
{
SipResponse response = new SipResponse(200, "OK");
SipHeadField hCallID = new SipHeadField(SipHeadFieldName.CallID, packet.CallID.Value);
SipHeadField hCSeq = new SipHeadField(SipHeadFieldName.CSeq, packet.CSeq.Value);
SipHeadField hFrom = new SipHeadField(SipHeadFieldName.From, packet.From.Value);
if (packet.To != null)
{
SipHeadField hTo = new SipHeadField(SipHeadFieldName.To, packet.To.Value);
response.HeadFields.Add(hTo);
}
if (packet.Supported != null)
{
SipHeadField hSupported = new SipHeadField(SipHeadFieldName.Supported, packet.Supported.Value);
response.HeadFields.Add(hSupported);
}
response.HeadFields.Add(hFrom);
response.HeadFields.Add(hCallID);
response.HeadFields.Add(hCSeq);
response.Body = Environment.NewLine;
return(response);
}
private bool CheckResponse(SipResponse rsp)
{
if (((rsp.CallID != null) && (rsp.CSeq != null)) && ((rsp.ContentLength == null) || ((int.Parse(rsp.ContentLength.Value) >= 0) && (int.Parse(rsp.ContentLength.Value) < MaxMessageLength))))
{
return(true);
}
if (this.MessageParsingFailed != null)
{
this.MessageParsingFailed(this, EventArgs.Empty);
}
return(false);
}
public static SipMessage RSPInvitePacket(SipMessage packet)
{
System.Net.EndPoint localPoint = Ower.Conncetion.LocalEndPoint;
string port = localPoint.ToString().Split(':')[1];
StringBuilder sb = new StringBuilder();
sb.AppendLine("v=0");
sb.AppendLine("o=-0 0 IN " + localPoint.ToString());
sb.AppendLine("s=session");
sb.AppendLine("c=IN IP4 " + localPoint.ToString());
sb.AppendLine("t=0 0");
sb.AppendLine(string.Format("m=message {0} sip {1}", port, Ower.Uri.Sid));
SipResponse response = CreateDefaultResponse(packet);
response.Body = sb.ToString();
return(response);
}
private bool ParseResponse(string line)
{
int blankIndex1 = line.IndexOf(" ");
int blankIndex2 = line.IndexOf(" ", (int)(blankIndex1 + 1));
if ((blankIndex1 < 1) || (blankIndex2 < 1))
{
if (this.MessageParsingFailed != null)
{
this.MessageParsingFailed(this, EventArgs.Empty);
}
return(false);
}
try
{
SipResponse msg = new SipResponse(int.Parse(line.Substring(blankIndex1, blankIndex2 - blankIndex1)), line.Substring(blankIndex2 + 1));
if (this.ParseHeaders(msg))
{
if (!this.CheckResponse(msg))
{
return(false);
}
this.responseEventArgs.Response = msg;
if (this.ResponseReceived != null)
{
this.ResponseReceived(this, this.responseEventArgs);
}
return(true);
}
return(false);
}
catch (Exception exception)
{
Trace.WriteLine(exception.ToString());
return(false);
}
}
public SipResponseReceivedEventArgs(SipResponse response)
{
this.response = response;
}