/// <summary>
/// Attempts to parse a SIP URI from a string.
/// </summary>
/// <param name="text">The input text.</param>
/// <param name="uri">The output <see cref="SipUri" />.</param>
/// <returns><c>true</c> if the URI was parsed successfully.</returns>
public static bool TryParse(string text, out SipUri uri)
{
uri = new SipUri();
if (uri.Parse(text))
{
return(true);
}
else
{
uri = null;
return(false);
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="speechServerUri">The Microsoft Speech Server <see cref="SipUri" />.</param>
/// <param name="trunkUri">The SIP trunking service URI <see cref="SipUri" />.</param>
public SipMssGatewaySettings(SipUri speechServerUri, SipUri trunkUri)
{
if (speechServerUri == null)
{
throw new ArgumentNullException("speechServerUri");
}
if (trunkUri == null)
{
throw new ArgumentNullException("trunkUri");
}
this.SpeechServerUri = speechServerUri;
this.TrunkUri = trunkUri;
}
/// <summary>
/// Returns a deep clone of the URI.
/// </summary>
/// <returns>The cloned copy.</returns>
public SipUri Clone()
{
var clone = new SipUri();
clone.isSecure = this.isSecure;
clone.user = this.user;
clone.host = this.host;
clone.port = this.port;
foreach (string key in this.parameters.Keys)
{
clone.parameters.Add(key, parameters[key]);
}
foreach (SipHeader header in this.headers)
{
clone.headers.Add(header.Clone());
}
return(clone);
}
/// <summary>
/// Converts a contact style header value into the <see cref="NetworkBinding" />
/// and optional <see cref="SipTransportType" /> to be used when figuring out
/// how to deliver an outbound SIP message.
/// </summary>
/// <param name="contactText">The <b>Contact</b> header text.</param>
/// <param name="binding">Returns as the <see cref="NetworkBinding" /> to use.</param>
/// <param name="transportType">Returns the <see cref="SipTransportType" /> to use</param>
/// <returns></returns>
/// <remarks>
/// <para>
/// The <paramref name="contactText" /> parameter should be passed as the SIP request URI,
/// or the value of a <b>To</b>, <b>From</b>, or a <b>Contact</b> header value. The method
/// parses this value, looking for the IP address, port, and transport information to be used
/// when selecting a transport to communicate with this entity. The method will perform an
/// necessary DNS lookups to resolve host names into IP addresses.
/// </para>
/// <para>
/// If the operation was successful, the method returns <c>true</c> and sets the <paramref name="binding" />
/// and <paramref name="transportType" /> values.
/// </para>
/// <note>
/// <paramref name="transportType" /> will return as <see cref="SipTransportType.Unspecified" /> if the
/// contact information didn't explicitly specify a transport.
/// </note>
/// </remarks>
public static bool TryGetRemoteBinding(string contactText, out NetworkBinding binding, out SipTransportType transportType)
{
SipContactValue v = new SipContactValue(contactText);
IPAddress address;
int port;
SipUri uri;
string transport;
string sHost, sPort;
int p;
binding = null;
transportType = SipTransportType.Unspecified;
// First try to parse the text as a SIP URI.
if (SipUri.TryParse(v.Uri, out uri))
{
if (!IPAddress.TryParse(uri.Host, out address))
{
try
{
address = Dns.GetHostEntry(uri.Host).AddressList[0];
}
catch
{
return(false);
}
}
binding = new NetworkBinding(address, uri.Port);
if (uri.Parameters.TryGetValue("transport", out transport))
{
switch (transport.ToUpper())
{
case "UDP":
transportType = SipTransportType.UDP;
break;
case "TCP":
transportType = SipTransportType.TCP;
break;
case "TLS":
transportType = SipTransportType.TLS;
break;
}
}
return(true);
}
// Now look for <ip-address> [":" <port>]
p = v.Uri.IndexOf(':');
if (p == -1)
{
if (!IPAddress.TryParse(v.Uri, out address))
{
try
{
address = Dns.GetHostEntry(v.Uri).AddressList.IPv4Only()[0];
}
catch
{
return(false);
}
}
binding = new NetworkBinding(address, NetworkPort.SIP);
return(true);
}
sHost = v.Uri.Substring(0, p).Trim();
sPort = v.Uri.Substring(p + 1).Trim();
if (sHost.Length == 0 || sPort.Length == 0)
{
return(false);
}
if (!int.TryParse(sPort, out port) || port <= 0 || port > ushort.MaxValue)
{
return(false);
}
if (IPAddress.TryParse(sHost, out address))
{
binding = new NetworkBinding(address, port);
return(true);
}
// The host portion is not an IP address so perform a host lookup
if (!IPAddress.TryParse(sHost, out address))
{
try
{
address = Dns.GetHostEntry(sHost).AddressList.IPv4Only()[0];
}
catch
{
return(false);
}
}
binding = new NetworkBinding(address, port);
return(true);
}
