protected virtual void OnSipReceivedFromTcp(SipMessageEventArgs e)
{
if (null != SipReceivedFromPipe)
{
SipReceivedFromPipe(this, e);
}
if (!e.Cancel && e.SipMessage.StartsWith("BYE", StringComparison.InvariantCultureIgnoreCase))
{ // We should kill sound proxy
REGEX.Match m = g_CallId.Match(e.SipMessage);
if (m.Success && m.Groups["q"].Success)
{
string callId = m.Groups["q"].Value;
SoundProxy sp = null;
if (m_SoundProxies.TryGetValue(callId, out sp))
{
m_SoundProxies.Remove(callId);
sp.Dispose();
m_Settings.WriteMessageToLog(
LogMessageType.Information + 1,
"Destroyed sound proxy for Call-ID '" + callId + '\''
);
}
}
}
}
protected virtual void OnRtpReceivedFromTcp(RtpMessageEventArgs e)
{
if (null != RtpReceivedFromPipe)
{
RtpReceivedFromPipe(this, e);
}
string callId;
byte[] soundData;
SoundProxy.GetSoundData(e.RtpData, e.RtpData.Length, out callId, out soundData);
SoundProxy sp;
if (!m_SoundProxies.TryGetValue(callId, out sp))
{
m_Settings.WriteMessageToLog(
LogMessageType.Error,
"Failed to find sound proxy for Call-ID '" + callId + "'. Ignoring sound packet."
);
}
sp.SendSoundDataToServer(soundData);
}
protected string CreateSoundProxyAndChangeSdpData(string sipMsg, out SoundProxy sp, out ushort length)
{
sp = null;
length = 0;
string localIp = m_Transport.LocalAddress.ToString();
System.IO.StringReader strReader = new System.IO.StringReader(sipMsg);
System.Text.StringBuilder sbSipMsg = new System.Text.StringBuilder(sipMsg.Length + 16);
string sipMsgLine, callId = null;
bool createProxy = false, startCounting = false;
while ((sipMsgLine = strReader.ReadLine()) != null)
{
if (sipMsgLine.StartsWith("Content-Type:", StringComparison.InvariantCultureIgnoreCase))
{
createProxy = (sipMsgLine.IndexOf("application/sdp", StringComparison.InvariantCultureIgnoreCase) > 0);
if (!createProxy)
{
return(sipMsg);
}
}
else if (sipMsgLine.StartsWith("Call-ID:", StringComparison.InvariantCultureIgnoreCase))
{
callId = sipMsgLine.Substring(8).Trim();
}
else if (null != sp && sipMsgLine.StartsWith("o=", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_SdpAddressInO.Replace(sipMsgLine, "${a}" + localIp + "${z}");
}
else if (null != sp && sipMsgLine.StartsWith("c=", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_SdpAddressInC.Replace(sipMsgLine, "${a}" + localIp + "${z}");
}
else if (null != sp && sipMsgLine.StartsWith("m=", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_SdpPortInM.Replace(sipMsgLine, "${a}" + sp.LocalPort.ToString(CultureInfo.InvariantCulture) + "${z}");
}
else if (0 == sipMsgLine.Length)
{
startCounting = true;
}
if (createProxy && null == sp && null != callId && callId.Length > 0)
{
sp = m_Transport.CreateSoundProxy(sipMsg, callId, false);
if (null == sp)
{
return(sipMsg);
}
}
sbSipMsg.Append(sipMsgLine + "\r\n");
if (startCounting && sipMsgLine.Length > 0)
{
length += (ushort)(sipMsgLine.Length + 2);
}
}
return(sbSipMsg.ToString());
}
protected override void OnSipReceivedFromPipe(object sender, SipMessageEventArgs e)
{
base.OnSipReceivedFromPipe(sender, e);
ushort sdpLength = 0;
SoundProxy sp = null;
string newSipMsg = CreateSoundProxyAndChangeSdpData(e.SipMessage, out sp, out sdpLength);
System.IO.StringReader strReader = new System.IO.StringReader(newSipMsg);
System.Text.StringBuilder sbSipMsg = new System.Text.StringBuilder(newSipMsg.Length + 16);
string sipMsgLine;
string localIp = m_Transport.LocalAddress.ToString();
bool request = false;
while ((sipMsgLine = strReader.ReadLine()) != null)
{
if (0 == sbSipMsg.Length)
{
if (!sipMsgLine.StartsWith("SIP/2.0", StringComparison.InvariantCultureIgnoreCase))
{
request = true;
REGEX.Match m = g_ServerInMsgType.Match(sipMsgLine);
if (m.Success && m.Groups["host"].Success && m.Groups["host"].Value.Equals(ProgramSettings.SipTunnelInternalHost, StringComparison.InvariantCulture))
{
sipMsgLine = g_ServerInMsgType.Replace(
sipMsgLine,
String.Format(
CultureInfo.InvariantCulture,
"${{a}}{0}{1}${{z}}",
m.Groups["acc"].Success ? m.Groups["acc"].Value + '@' : String.Empty,
Settings.SipServerHost
)
);
}
}
}
else
{
if (sipMsgLine.StartsWith("Via:", StringComparison.InvariantCultureIgnoreCase))
{
if (request)
{
sbSipMsg.AppendFormat(
CultureInfo.InvariantCulture,
"Via: SIP/2.0/{0} {1}:{2};rport;SipTunnel\n",
Settings.ServerType == ConnectorType.UDP ? "UDP" : "TCP",
localIp,
m_Transport.LocalPort
);
}
}
else if (sipMsgLine.StartsWith("To:", StringComparison.InvariantCultureIgnoreCase))
{
REGEX.Match m = g_To.Match(sipMsgLine);
if (m.Success && m.Groups["q"].Success && m.Groups["q"].Value.Equals(ProgramSettings.SipTunnelInternalHost, StringComparison.InvariantCulture))
{
sipMsgLine = g_To.Replace(sipMsgLine, "${a}" + Settings.SipServerHost + "${z}");
}
}
else if (sipMsgLine.StartsWith("Content-Length:", StringComparison.CurrentCultureIgnoreCase))
{
if (sp != null && sdpLength > 0)
{
sipMsgLine = "Content-Length: " + sdpLength.ToString(CultureInfo.InvariantCulture);
}
}
else if (sipMsgLine.StartsWith("From:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_From.Replace(sipMsgLine, "${a}${acc}@" + Settings.SipServerHost + "${z}");
}
else if (sipMsgLine.StartsWith("Contact:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_Contact.Replace(sipMsgLine, "${a}${acc}@" + localIp + ':' + m_Transport.LocalPort.ToString(CultureInfo.InvariantCulture) + "${z}");
}
else if (sipMsgLine.StartsWith("User-Agent:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine += " (via SipTunnel)";
}
}
sbSipMsg.AppendLine(sipMsgLine);
}
m_Transport.SendSipMsgToClient(sbSipMsg.ToString(), Settings.SipServerHost, Settings.SipServerPort);
}
protected override void OnSipReceivedFromPipe(object sender, SipMessageEventArgs e)
{
base.OnSipReceivedFromPipe(sender, e);
ushort sdpLength = 0;
SoundProxy sp = null;
string newSipMsg = CreateSoundProxyAndChangeSdpData(e.SipMessage, out sp, out sdpLength);
System.IO.StringReader strReader = new System.IO.StringReader(newSipMsg);
System.Text.StringBuilder sbSipMsg = new System.Text.StringBuilder(newSipMsg.Length + 16);
string sipMsgLine;
string localIp = Settings.ClientIp.ToString();
bool request = false;
System.Net.IPEndPoint ipEp = null;
while ((sipMsgLine = strReader.ReadLine()) != null)
{
if (0 == sbSipMsg.Length)
{
if (!sipMsgLine.StartsWith("SIP/2.0", StringComparison.InvariantCultureIgnoreCase))
{
request = true;
#if PLAT_WINDOWS || PLAT_MONO
REGEX.Match m = g_ServerInMsgType.Match(sipMsgLine);
if (!m.Success)
{
throw new SipProxyClientException("Message header is wrong format.");
}
if (!m.Groups["acc"].Success)
{
throw new SipProxyClientException("Account code not found in message header.");
}
if (!m_Accounts.TryGetValue(m.Groups["acc"].Value, out ipEp))
{
throw new SipProxyClientException("Account for code '" + m.Groups["acc"].Value + "' not found.");
}
#else
if (null == m_EpClientContact)
{
throw new SipProxyClientException("Client end point not set (contact).");
}
ipEp = m_EpClientContact;
#endif
sipMsgLine = g_ServerInMsgType.Replace(sipMsgLine, "${a}${acc}@" + localIp + "${z}");
}
}
else
{
if (sipMsgLine.StartsWith("Via:", StringComparison.InvariantCultureIgnoreCase))
{
if (request)
{
sbSipMsg.AppendFormat(
CultureInfo.InvariantCulture,
"Via: SIP/2.0/{0} {1}:{2};rport;SipTunnel\r\n",
Settings.ServerType == ConnectorType.UDP ? "UDP" : "TCP",
localIp,
m_Transport.LocalPort
);
}
else
{
REGEX.Match m = g_Via.Match(sipMsgLine);
if (!m.Success)
{
throw new SipProxyClientException("Via header is wrong format or is absent.");
}
if (m.Groups["rport"].Success && m.Groups["rport"].Value.Length > 0)
{ // Using sender's source address and port
if (!m.Groups["stckVal"].Success)
{
throw new SipProxyClientException("Via header parameter 'stck' not found.");
}
#if PLAT_WINDOWS || PLAT_MONO
int key = int.Parse(m.Groups["stckVal"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture);
if (!m_Clients.ContainsKey(key))
{
throw new SipProxyClientException("Failed to find client for value in 'stck'.");
}
ipEp = m_Clients[key];
#else
if (null == m_EpClientStck)
{
throw new SipProxyClientException("Client end point not set (stck).");
}
ipEp = m_EpClientStck;
#endif
}
else
{ // Using address and port from Via header
if (!m.Groups["addr"].Success || !m.Groups["port"].Success)
{
throw new SipProxyClientException("Address or port in Via header not found.");
}
ipEp = new System.Net.IPEndPoint(
NET.IPAddress.Parse(m.Groups["addr"].Value),
ushort.Parse(m.Groups["port"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture)
);
}
}
}
else if (sipMsgLine.StartsWith("To:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_To.Replace(sipMsgLine, "${a}" + localIp + "${z}");
}
else if (sipMsgLine.StartsWith("From:", StringComparison.InvariantCultureIgnoreCase))
{
REGEX.Match m = g_From.Match(sipMsgLine);
if (m.Success && m.Groups["host"].Success && m.Groups["host"].Value.Equals(ProgramSettings.SipTunnelInternalHost, StringComparison.InvariantCulture))
{
sipMsgLine = g_From.Replace(sipMsgLine, "${a}${acc}@" + localIp + "${z}");
}
}
else if (sipMsgLine.StartsWith("Content-Length:", StringComparison.CurrentCultureIgnoreCase))
{
if (sp != null && sdpLength > 0)
{
sipMsgLine = "Content-Length: " + sdpLength.ToString(CultureInfo.InvariantCulture);
}
}
else if (sipMsgLine.StartsWith("Contact:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_Contact.Replace(sipMsgLine, "${a}${acc}@" + localIp + ':' + m_Transport.LocalPort.ToString(CultureInfo.InvariantCulture) + "${z}");
}
else if (sipMsgLine.StartsWith("User-Agent:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine += " (via SipTunnel)";
}
}
sbSipMsg.Append(sipMsgLine + "\r\n");
}
m_Transport.SendSipMsgToClient(sbSipMsg.ToString(), ipEp);
}
public SoundProxy CreateSoundProxy(string sipMsg, string callId, bool setServer)
{
if (null == sipMsg || 0 == sipMsg.Length)
{
return(null);
}
if (null == callId || 0 == callId.Length)
{
return(null);
}
SoundProxy sp = null;
if (m_SoundProxies.TryGetValue(callId, out sp))
{
if (!setServer)
{
return(sp);
}
if (sp.ServerSet)
{
return(sp);
}
}
REGEX.Match m = g_SdpAddressInC.Match(sipMsg);
if (!m.Groups["q"].Success)
{
return(null);
}
string ssHost = m.Groups["q"].Value;
m = g_SdpPortInM.Match(sipMsg);
if (!m.Groups["q"].Success)
{
return(null);
}
ushort ssPort = ushort.Parse(m.Groups["q"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture);
if (0 == ssPort)
{
return(null);
}
if (null == sp)
{
if (setServer)
{
sp = new SoundProxy(ssHost, ssPort, callId, this);
}
else
{
sp = new SoundProxy(callId, this);
}
m_SoundProxies.Add(callId, sp);
m_Settings.WriteMessageToLog(
LogMessageType.Information + 1,
string.Format(
CultureInfo.CurrentUICulture,
"Created sound proxy" + (setServer ? " for {1}:{2}" : string.Empty) + " with branch {0}.",
callId,
ssHost,
ssPort
)
);
}
else
{
sp.SetServer(ssHost, ssPort);
m_Settings.WriteMessageToLog(
LogMessageType.Information + 1,
string.Format(
CultureInfo.CurrentUICulture,
"Updated sound proxy for {0}:{1} with branch {2}.",
ssHost,
ssPort,
callId
)
);
}
return(sp);
}