protected virtual void OnSipReceivedFromClient(SipMessageEventArgs e)
{
if (null != SipReceivedFromClient)
{
SipReceivedFromClient(this, e);
}
}
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 OnSipReceivedFromClient(object sender, SipMessageEventArgs e)
{
}
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 OnSipReceivedFromClient(object sender, SipMessageEventArgs e)
{
base.OnSipReceivedFromClient(sender, e);
if (0 == e.SipMessage.Trim().Length)
{
return;
}
System.IO.StringReader strReader = new System.IO.StringReader(e.SipMessage);
System.Text.StringBuilder sbSipMsg = new System.Text.StringBuilder(e.SipMessage.Length + 16);
string sipMsgLine, callId = null;
bool createProxy = false;
while ((sipMsgLine = strReader.ReadLine()) != null)
{
if (0 == sbSipMsg.Length)
{
//if (!sipMsgLine.StartsWith("SIP/2.0", StringComparison.InvariantCultureIgnoreCase))
//{
// REGEX.Match m = g_ServerInMsgType.Match(sipMsgLine);
// if (m.Success && m.Groups["q"].Success && Settings.IsSipServerHost(m.Groups["q"].Value))
// sipMsgLine = g_ServerInMsgType.Replace(sipMsgLine, "${a}" + ProgramSettings.SipTunnelInternalHost + "${z}");
//}
}
else
{
if (sipMsgLine.StartsWith("Via:", StringComparison.InvariantCultureIgnoreCase))
{
if (sipMsgLine.Contains("SipTunnel"))
{
continue;
}
}
else if (sipMsgLine.StartsWith("To:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_To.Replace(sipMsgLine, "${a}" + ProgramSettings.SipTunnelInternalHost + "${z}");
}
else if (sipMsgLine.StartsWith("Content-Type:", StringComparison.InvariantCultureIgnoreCase))
{
createProxy = sipMsgLine.Contains("application/sdp");
}
else if (sipMsgLine.StartsWith("Call-ID:", StringComparison.InvariantCultureIgnoreCase))
{
callId = sipMsgLine.Substring(8).Trim();
}
else if (sipMsgLine.StartsWith("From:", StringComparison.InvariantCultureIgnoreCase))
{
REGEX.Match m = g_From.Match(sipMsgLine);
if (m.Success && m.Groups["host"].Success && Settings.IsSipServerHost(m.Groups["host"].Value))
{
sipMsgLine = g_From.Replace(sipMsgLine, "${a}${acc}@" + ProgramSettings.SipTunnelInternalHost + "${z}");
}
}
}
sbSipMsg.AppendLine(sipMsgLine);
}
string sipMsg = sbSipMsg.ToString();
if (createProxy && null != callId && callId.Length > 0)
{
m_Transport.CreateSoundProxy(sipMsg, callId, true);
createProxy = false;
}
m_Transport.SendToPipe(sipMsg);
}
protected override void OnSipReceivedFromPipe(object sender, SipMessageEventArgs e)
{
base.OnSipReceivedFromPipe(sender, e);
ushort sdpLength = 0;
SoundProxy sp = null;
string newSipMsg = CreateSoundProxyAndChangeSdpData(e.SipMessage, out sp, out sdpLength);
System.IO.StringReader strReader = new System.IO.StringReader(newSipMsg);
System.Text.StringBuilder sbSipMsg = new System.Text.StringBuilder(newSipMsg.Length + 16);
string sipMsgLine;
string localIp = Settings.ClientIp.ToString();
bool request = false;
System.Net.IPEndPoint ipEp = null;
while ((sipMsgLine = strReader.ReadLine()) != null)
{
if (0 == sbSipMsg.Length)
{
if (!sipMsgLine.StartsWith("SIP/2.0", StringComparison.InvariantCultureIgnoreCase))
{
request = true;
#if PLAT_WINDOWS || PLAT_MONO
REGEX.Match m = g_ServerInMsgType.Match(sipMsgLine);
if (!m.Success)
{
throw new SipProxyClientException("Message header is wrong format.");
}
if (!m.Groups["acc"].Success)
{
throw new SipProxyClientException("Account code not found in message header.");
}
if (!m_Accounts.TryGetValue(m.Groups["acc"].Value, out ipEp))
{
throw new SipProxyClientException("Account for code '" + m.Groups["acc"].Value + "' not found.");
}
#else
if (null == m_EpClientContact)
{
throw new SipProxyClientException("Client end point not set (contact).");
}
ipEp = m_EpClientContact;
#endif
sipMsgLine = g_ServerInMsgType.Replace(sipMsgLine, "${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);
}
protected override void OnSipReceivedFromClient(object sender, SipMessageEventArgs e)
{
base.OnSipReceivedFromClient(sender, e);
if (0 == e.SipMessage.Trim().Length)
{
return;
}
System.IO.StringReader strReader = new System.IO.StringReader(e.SipMessage);
System.Text.StringBuilder sbSipMsg = new System.Text.StringBuilder(e.SipMessage.Length + 16);
string sipMsgLine, callId = null;
bool createProxy = false;
while ((sipMsgLine = strReader.ReadLine()) != null)
{
if (0 == sbSipMsg.Length)
{
if (!sipMsgLine.StartsWith("SIP/2.0", StringComparison.InvariantCultureIgnoreCase))
{
REGEX.Match m = g_ServerInMsgType.Match(sipMsgLine);
if (m.Success && m.Groups["host"].Success && Settings.IsClientHost(m.Groups["host"].Value))
{
sipMsgLine = g_ServerInMsgType.Replace(
sipMsgLine,
string.Format(
CultureInfo.InvariantCulture,
"${{a}}{0}{1}${{z}}",
m.Groups["acc"].Success ? m.Groups["acc"].Value + '@' : string.Empty,
ProgramSettings.SipTunnelInternalHost
)
);
}
}
}
else
{
if (sipMsgLine.StartsWith("Via:", StringComparison.InvariantCultureIgnoreCase))
{
REGEX.Match m = g_Via.Match(sipMsgLine);
if (m.Success && m.Groups["rport"].Success)
{
int key = e.RemoteEndPoint.GetHashCode();
sipMsgLine += ";stck=" + key.ToString(CultureInfo.InvariantCulture);
#if PLAT_WINDOWS || PLAT_MONO
if (!m_Clients.ContainsKey(key))
{
m_Clients.Add(key, e.RemoteEndPoint);
}
#else
if (null == m_EpClientStck)
{
m_EpClientStck = e.RemoteEndPoint;
}
#endif
}
}
if (sipMsgLine.StartsWith("From:", StringComparison.InvariantCultureIgnoreCase))
{
sipMsgLine = g_From.Replace(sipMsgLine, "${a}${acc}@" + ProgramSettings.SipTunnelInternalHost + "${z}");
}
else if (sipMsgLine.StartsWith("Contact:", StringComparison.InvariantCultureIgnoreCase))
{
REGEX.Match m = g_Contact.Match(sipMsgLine);
#if PLAT_WINDOWS || PLAT_MONO
if (m.Success && m.Groups["acc"].Success && !m_Accounts.ContainsKey(m.Groups["acc"].Value))
{
if (!m.Groups["host"].Success)
{
throw new SipProxyClientException("Host in Contact header not found.");
}
ushort port = 5060;
if (m.Groups["port"].Success && m.Groups["port"].Value.Length > 0)
{
port = ushort.Parse(m.Groups["port"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture);
}
m_Accounts.Add(
m.Groups["acc"].Value,
new NET.IPEndPoint(NET.IPAddress.Parse(m.Groups["host"].Value), port)
);
}
#else
if (m.Success && m.Groups["acc"].Success)
{
if (!m.Groups["host"].Success)
{
throw new SipProxyClientException("Host in Contact header not found.");
}
ushort port = 5060;
if (m.Groups["port"].Success && m.Groups["port"].Value.Length > 0)
{
port = ushort.Parse(m.Groups["port"].Value, NumberStyles.Integer, CultureInfo.InvariantCulture);
}
m_EpClientContact = new NET.IPEndPoint(NET.IPAddress.Parse(m.Groups["host"].Value), port);
}
#endif
}
else if (sipMsgLine.StartsWith("Content-Type:", StringComparison.InvariantCultureIgnoreCase))
{
createProxy = (sipMsgLine.IndexOf("application/sdp", StringComparison.InvariantCultureIgnoreCase) > 0);
}
else if (sipMsgLine.StartsWith("Call-ID:", StringComparison.InvariantCultureIgnoreCase))
{
callId = sipMsgLine.Substring(8).Trim();
}
else if (sipMsgLine.StartsWith("To:", StringComparison.InvariantCultureIgnoreCase))
{
REGEX.Match m = g_To.Match(sipMsgLine);
if (m.Success && m.Groups["q"].Success && Settings.IsClientHost(m.Groups["q"].Value))
{
sipMsgLine = g_To.Replace(sipMsgLine, "${a}" + ProgramSettings.SipTunnelInternalHost + "${z}");
}
}
}
sbSipMsg.Append(sipMsgLine + '\n');
}
string sipMsg = sbSipMsg.ToString();
if (createProxy && callId != null && callId.Length > 0)
{
m_Transport.CreateSoundProxy(sipMsg, callId, true);
createProxy = false;
}
m_Transport.SendToPipe(sipMsg);
}
