/// <summary>
/// Creates a SDP offer.
/// </summary>
/// <param name="streams">A list of SDP Media objects.</param>
/// <param name="parameters">The parameters.</param>
/// <param name="previous">Optional previous SDP.</param>
/// <returns>SDP.</returns>
public static SDP CreateOffer(List <SDPMedia> streams, Dictionary <string, string> parameters, SDP previous = null)
{
SDP s = new SDP();
s.Other["v"] = "0";
foreach (Char a in "iep")
{
if (parameters.ContainsKey(a.ToString()))
{
s.Other[a.ToString()] = parameters[a.ToString()];
}
}
if (previous != null && previous.Originator != null)
{
s.Originator = new SDPOriginator(previous.Originator.ToString());
s.Originator.Version = s.Originator.Version + 1;
}
s.Other["s"] = "-";
s.Other["t"] = "0";
s.Media = streams;
return(s);
}
/// <summary>
/// Parses the specified SDP.
/// </summary>
/// <param name="sdp">The input SDP text.</param>
public void Parse(string sdp)
{
sdp = sdp.Replace("\r\n", "\n");
sdp = sdp.Replace("\r", "\n");
sdp = sdp.Trim();
foreach (String line in sdp.Split('\n'))
{
//Per line parsing
string[] values = line.Split("=".ToCharArray(), 2);
string k = values[0];
string currentObject = "";
switch (k)
{
case "o":
Originator = new SDPOriginator(values[1]);
currentObject = Originator.ToString();
break;
case "c":
Connection = new SDPConnection(values[1]);
currentObject = Connection.ToString();
break;
case "m":
{
SDPMedia currentMedia = new SDPMedia(values[1]);
Media.Add(currentMedia);
currentObject = currentMedia.ToString();
}
break;
default:
currentObject = values[1];
break;
}
if (k == "m")
{
SDPMedia obj = Media.Last();
}
else if (Media.Count > 0)
{
SDPMedia obj = Media.Last();
if (k == "a" && values[1].StartsWith("rtpmap:"))
{
string[] split = values[1].Remove(0, 7).Split(" ".ToCharArray(), 2);
string pt = split[0];
string[] rest = split[1].Split("/".ToCharArray(), 2);
string name = rest[0];
string rate = null;
string parameters = null;
if (rest.Length > 1)
{
string[] final = rest[1].Split("/".ToCharArray(), 2);
rate = final[0];
parameters = null;
if (final.Length > 1)
{
parameters = final[1];
}
}
foreach (SDPMediaFormat f in obj.Mediaformats)
{
if (f.Pt == pt)
{
f.Name = name;
if (rate != null)
{
f.Rate = rate;
}
if (parameters != null)
{
f.Parameters = parameters;
}
}
}
}
else
{
if (!Multiple.Contains(k))
{
obj.OtherAttributes.Add(k, currentObject);
}
else
{
if (!obj.OtherAttributes.ContainsKey(k))
{
obj.OtherAttributes.Add(k, currentObject);
}
//TODO HANDLE multiple attributes of the same type;
//if (obj.properties.ContainsKey(k))
//{
// obj[k, true].Add(current_attribute);
//}
//else
//{
// obj[k, true] = new List<AttributeClass>();
// obj[k, true].Add(current_attribute);
//}
}
}
}
else
{
if (k != "o" && k != "c")
{
SDP obj = this;
if (!Multiple.Contains(k))
{
obj.Other.Add(k, currentObject);
}
else
{
obj.Other.Add(k, currentObject);
//TODO HANDLE multiple attributes of the same type;
//if (obj.properties.ContainsKey(k))
//{
// obj[k, true].Add(current_attribute);
//}
//else
//{
// obj[k, true] = new List<AttributeClass>();
// obj[k, true].Add(current_attribute);
//}
}
}
}
}
}
/// <summary>
/// Creates a SDP answer.
/// </summary>
/// <param name="streams">A list of SDP Media objects..</param>
/// <param name="offer">The SDP offer.</param>
/// <param name="parameters">Optional parameters.</param>
/// <returns>SDP.</returns>
public static SDP CreateAnswer(List <SDPMedia> streams, SDP offer, Dictionary <string, string> parameters = null)
{
SDP s = new SDP();
s.Other["v"] = "0";
foreach (Char a in "iep")
{
if (parameters.ContainsKey(a.ToString()))
{
s.Other[a.ToString()] = parameters[a.ToString()];
}
}
s.Originator = new SDPOriginator();
s.Other["s"] = "-";
s.Other["t"] = offer.Other["t"];
foreach (SDPMedia yourMedia in offer.Media)
{
SDPMedia myMedia = null;
foreach (SDPMedia t in streams)
{
if (t.Media != yourMedia.Media)
{
continue;
}
myMedia = new SDPMedia(t.ToString());
//streams.RemoveAt(i);
List <KeyValuePair <SDPMediaFormat, SDPMediaFormat> > found =
new List <KeyValuePair <SDPMediaFormat, SDPMediaFormat> >();
foreach (SDPMediaFormat yourmf in yourMedia.Mediaformats)
{
foreach (SDPMediaFormat mymf in myMedia.Mediaformats)
{
int mymfpt = -1;
int yourmfpt = -1;
try
{
mymfpt = Int32.Parse(mymf.Pt);
yourmfpt = Int32.Parse(yourmf.Pt);
}
catch (Exception)
{
mymfpt = -1;
yourmfpt = -1;
}
if ((0 <= mymfpt && mymfpt < 32 && 0 <= yourmfpt && yourmfpt <= 32 && mymfpt == yourmfpt) ||
(mymfpt < 0 && yourmfpt < 0 && mymfpt == yourmfpt) ||
(mymf.Name == yourmf.Name && mymf.Rate == yourmf.Rate && mymf.Count == yourmf.Count))
{
found.Add(new KeyValuePair <SDPMediaFormat, SDPMediaFormat>(yourmf, mymf));
break;
}
}
}
if (found.Count > 0)
{
foreach (KeyValuePair <SDPMediaFormat, SDPMediaFormat> kvp in found)
{
myMedia.Mediaformats.Add(kvp.Key);
}
}
else
{
myMedia.Mediaformats.Clear();
SDPMediaFormat temp = new SDPMediaFormat {
Pt = "0"
};
myMedia.Mediaformats.Add(temp);
myMedia.Port = "0";
}
}
if (myMedia == null)
{
myMedia = new SDPMedia(yourMedia.ToString())
{
Port = "0"
};
}
s.Media.Add(myMedia);
}
bool valid = s.Media.Any(myMedia => myMedia.Port != "0");
return(valid ? s : null);
}
internal void AcceptCall(SDP sdp, Message IncomingCall)
{
foreach (UserAgent userAgent in Useragents.ToArray())
{
if (userAgent.CallID == IncomingCall.First("Call-ID").Value.ToString())
{
Message response = userAgent.CreateResponse(200, "OK");
response.InsertHeader(new Header("application/sdp", "Content-Type"));
response.Body = sdp.ToString();
userAgent.SendResponse(response);
}
}
}
public void SendInvite(string uri, SDP sdp)
{
uri = checkURI(uri);
UserAgent cua = new UserAgent(Stack) { LocalParty = PublicServiceIdentity, RemoteParty = new Address(uri) };
Useragents.Add(cua);
Message invite = cua.CreateRequest("INVITE");
invite.InsertHeader(new Header("application/sdp", "Content-Type"));
invite.Body = sdp.ToString();
cua.SendRequest(invite);
}
internal void StopCall(SDP sdp)
{
//Message response = CallUA.CreateResponse(200, "OK");
//response.InsertHeader(new Header("application/sdp", "Content-Type"));
//response.Body = sdp.ToString();
//CallUA.SendResponse(response);
}
public void Invite(string uri, SDP sdp)
{
uri = checkURI(uri);
if (IsRegistered())
{
UserAgent cua = new UserAgent(Stack) { LocalParty = RegisterUA.LocalParty, RemoteParty = new Address(uri) };
Useragents.Add(cua);
Message invite = cua.CreateRequest("INVITE");
invite.InsertHeader(new Header("application/sdp", "Content-Type"));
invite.Body= sdp.ToString();
cua.SendRequest(invite);
}
else
{
Log.Error("isRegistered failed in invite message");
}
}
/// <summary>
/// Creates a SDP offer.
/// </summary>
/// <param name="streams">A list of SDP Media objects.</param>
/// <param name="parameters">The parameters.</param>
/// <param name="previous">Optional previous SDP.</param>
/// <returns>SDP.</returns>
public static SDP CreateOffer(List<SDPMedia> streams, Dictionary<string, string> parameters, SDP previous = null)
{
SDP s = new SDP();
s.Other["v"] = "0";
foreach (Char a in "iep")
{
if (parameters.ContainsKey(a.ToString()))
{
s.Other[a.ToString()] = parameters[a.ToString()];
}
}
if (previous != null && previous.Originator != null)
{
s.Originator = new SDPOriginator(previous.Originator.ToString());
s.Originator.Version = s.Originator.Version + 1;
}
s.Other["s"] = "-";
s.Other["t"] = "0";
s.Media = streams;
return s;
}
/// <summary>
/// Creates a SDP answer.
/// </summary>
/// <param name="streams">A list of SDP Media objects..</param>
/// <param name="offer">The SDP offer.</param>
/// <param name="parameters">Optional parameters.</param>
/// <returns>SDP.</returns>
public static SDP CreateAnswer(List<SDPMedia> streams, SDP offer, Dictionary<string, string> parameters = null)
{
SDP s = new SDP();
s.Other["v"] = "0";
foreach (Char a in "iep")
{
if (parameters.ContainsKey(a.ToString()))
{
s.Other[a.ToString()] = parameters[a.ToString()];
}
}
s.Originator = new SDPOriginator();
s.Other["s"] = "-";
s.Other["t"] = offer.Other["t"];
foreach (SDPMedia yourMedia in offer.Media)
{
SDPMedia myMedia = null;
foreach (SDPMedia t in streams)
{
if (t.Media != yourMedia.Media) continue;
myMedia = new SDPMedia(t.ToString());
//streams.RemoveAt(i);
List<KeyValuePair<SDPMediaFormat, SDPMediaFormat>> found =
new List<KeyValuePair<SDPMediaFormat, SDPMediaFormat>>();
foreach (SDPMediaFormat yourmf in yourMedia.Mediaformats)
{
foreach (SDPMediaFormat mymf in myMedia.Mediaformats)
{
int mymfpt = -1;
int yourmfpt = -1;
try
{
mymfpt = Int32.Parse(mymf.Pt);
yourmfpt = Int32.Parse(yourmf.Pt);
}
catch (Exception)
{
mymfpt = -1;
yourmfpt = -1;
}
if ((0 <= mymfpt && mymfpt < 32 && 0 <= yourmfpt && yourmfpt <= 32 && mymfpt == yourmfpt)
|| (mymfpt < 0 && yourmfpt < 0 && mymfpt == yourmfpt)
|| (mymf.Name == yourmf.Name && mymf.Rate == yourmf.Rate && mymf.Count == yourmf.Count))
{
found.Add(new KeyValuePair<SDPMediaFormat, SDPMediaFormat>(yourmf, mymf));
break;
}
}
}
if (found.Count > 0)
{
foreach (KeyValuePair<SDPMediaFormat, SDPMediaFormat> kvp in found)
{
myMedia.Mediaformats.Add(kvp.Key);
}
}
else
{
myMedia.Mediaformats.Clear();
SDPMediaFormat temp = new SDPMediaFormat {Pt = "0"};
myMedia.Mediaformats.Add(temp);
myMedia.Port = "0";
}
}
if (myMedia == null)
{
myMedia = new SDPMedia(yourMedia.ToString()) {Port = "0"};
}
s.Media.Add(myMedia);
}
bool valid = s.Media.Any(myMedia => myMedia.Port != "0");
return valid ? s : null;
}
