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using Gee;
using Xmpp;
using Xmpp.Xep;
public class Xmpp.Xep.JingleRtp.Parameters : Jingle.ContentParameters, Object {
public signal void stream_created(Stream stream);
public signal void connection_ready();
public string media { get; private set; }
public string? ssrc { get; private set; }
public bool rtcp_mux { get; private set; }
public string? bandwidth { get; private set; }
public string? bandwidth_type { get; private set; }
public bool encryption_required { get; private set; default = false; }
public PayloadType? agreed_payload_type { get; private set; }
public Gee.List<PayloadType> payload_types = new ArrayList<PayloadType>(PayloadType.equals_func);
public Gee.List<HeaderExtension> header_extensions = new ArrayList<HeaderExtension>();
public Gee.List<Crypto> remote_cryptos = new ArrayList<Crypto>();
public Crypto? local_crypto = null;
public Crypto? remote_crypto = null;
public bool rtp_ready { get; private set; default=false; }
public bool rtcp_ready { get; private set; default=false; }
public weak Stream? stream { get; private set; }
private Module parent;
public Parameters(Module parent,
string media, Gee.List<PayloadType> payload_types,
string? ssrc = null, bool rtcp_mux = false,
string? bandwidth = null, string? bandwidth_type = null,
bool encryption_required = false, Crypto? local_crypto = null
) {
this.parent = parent;
this.media = media;
this.ssrc = ssrc;
this.rtcp_mux = true;
this.bandwidth = bandwidth;
this.bandwidth_type = bandwidth_type;
this.encryption_required = encryption_required;
this.payload_types = payload_types;
this.local_crypto = local_crypto;
}
public Parameters.from_node(Module parent, StanzaNode node) throws Jingle.IqError {
this.parent = parent;
this.media = node.get_attribute("media");
this.ssrc = node.get_attribute("ssrc");
this.rtcp_mux = node.get_subnode("rtcp-mux") != null;
StanzaNode? encryption = node.get_subnode("encryption");
if (encryption != null) {
this.encryption_required = encryption.get_attribute_bool("required", this.encryption_required);
foreach (StanzaNode crypto in encryption.get_subnodes("crypto")) {
this.remote_cryptos.add(Crypto.parse(crypto));
}
}
foreach (StanzaNode payloadType in node.get_subnodes(PayloadType.NAME)) {
this.payload_types.add(PayloadType.parse(payloadType));
}
foreach (StanzaNode subnode in node.get_subnodes(HeaderExtension.NAME, HeaderExtension.NS_URI)) {
this.header_extensions.add(HeaderExtension.parse(subnode));
}
}
public async void handle_proposed_content(XmppStream stream, Jingle.Session session, Jingle.Content content) {
agreed_payload_type = yield parent.pick_payload_type(media, payload_types);
if (agreed_payload_type == null) {
debug("no usable payload type");
content.reject();
return;
}
// Drop unsupported header extensions
var iter = header_extensions.iterator();
while(iter.next()) {
if (!parent.is_header_extension_supported(media, iter.@get())) iter.remove();
}
remote_crypto = parent.pick_remote_crypto(remote_cryptos);
if (local_crypto == null && remote_crypto != null) {
local_crypto = parent.pick_local_crypto(remote_crypto);
}
if ((local_crypto == null || remote_crypto == null) && encryption_required) {
debug("no usable encryption, but encryption required");
content.reject();
return;
}
}
public void accept(XmppStream stream, Jingle.Session session, Jingle.Content content) {
debug("[%p] Jingle RTP on_accept", stream);
Jingle.DatagramConnection rtp_datagram = (Jingle.DatagramConnection) content.get_transport_connection(1);
Jingle.DatagramConnection rtcp_datagram = (Jingle.DatagramConnection) content.get_transport_connection(2);
ulong rtcp_ready_handler_id = 0;
rtcp_ready_handler_id = rtcp_datagram.notify["ready"].connect((rtcp_datagram, _) => {
this.stream.on_rtcp_ready();
this.rtcp_ready = true;
((Jingle.DatagramConnection)rtcp_datagram).disconnect(rtcp_ready_handler_id);
rtcp_ready_handler_id = 0;
});
ulong rtp_ready_handler_id = 0;
rtp_ready_handler_id = rtp_datagram.notify["ready"].connect((rtp_datagram, _) => {
this.stream.on_rtp_ready();
this.rtp_ready = true;
if (rtcp_mux) {
this.stream.on_rtcp_ready();
this.rtcp_ready = true;
}
connection_ready();
((Jingle.DatagramConnection)rtp_datagram).disconnect(rtp_ready_handler_id);
rtp_ready_handler_id = 0;
});
ulong session_state_handler_id = 0;
session_state_handler_id = session.notify["state"].connect((obj, _) => {
Jingle.Session session2 = (Jingle.Session) obj;
if (session2.state == Jingle.Session.State.ENDED) {
if (rtcp_ready_handler_id != 0) rtcp_datagram.disconnect(rtcp_ready_handler_id);
if (rtp_ready_handler_id != 0) rtp_datagram.disconnect(rtp_ready_handler_id);
if (session_state_handler_id != 0) {
session2.disconnect(session_state_handler_id);
}
}
});
if (remote_crypto == null || local_crypto == null) {
if (encryption_required) {
warning("Encryption required but not provided in both directions");
return;
}
remote_crypto = null;
local_crypto = null;
}
if (remote_crypto != null && local_crypto != null) {
var content_encryption = new Xmpp.Xep.Jingle.ContentEncryption("", "SRTP", local_crypto.key, remote_crypto.key);
content.encryptions[content_encryption.encryption_name] = content_encryption;
}
this.stream = parent.create_stream(content);
this.stream.weak_ref(() => this.stream = null);
rtp_datagram.datagram_received.connect(this.stream.on_recv_rtp_data);
rtcp_datagram.datagram_received.connect(this.stream.on_recv_rtcp_data);
this.stream.on_send_rtp_data.connect(rtp_datagram.send_datagram);
this.stream.on_send_rtcp_data.connect(rtcp_datagram.send_datagram);
this.stream_created(this.stream);
this.stream.create();
}
public void handle_accept(XmppStream stream, Jingle.Session session, Jingle.Content content, StanzaNode description_node) {
rtcp_mux = description_node.get_subnode("rtcp-mux") != null;
Gee.List<StanzaNode> payload_type_nodes = description_node.get_subnodes("payload-type");
if (payload_type_nodes.size == 0) {
warning("Counterpart didn't include any payload types");
return;
}
PayloadType preferred_payload_type = PayloadType.parse(payload_type_nodes[0]);
if (!payload_types.contains(preferred_payload_type)) {
warning("Counterpart's preferred content type doesn't match any of our sent ones");
}
agreed_payload_type = preferred_payload_type;
Gee.List<StanzaNode> crypto_nodes = description_node.get_deep_subnodes("encryption", "crypto");
if (crypto_nodes.size == 0) {
debug("Counterpart didn't include any cryptos");
if (encryption_required) {
return;
}
} else {
Crypto preferred_crypto = Crypto.parse(crypto_nodes[0]);
if (local_crypto.crypto_suite != preferred_crypto.crypto_suite) {
warning("Counterpart's crypto suite doesn't match any of our sent ones");
}
remote_crypto = preferred_crypto;
}
accept(stream, session, content);
}
public void terminate(bool we_terminated, string? reason_name, string? reason_text) {
if (stream != null) parent.close_stream(stream);
}
public StanzaNode get_description_node() {
StanzaNode ret = new StanzaNode.build("description", NS_URI)
.add_self_xmlns()
.put_attribute("media", media);
if (agreed_payload_type != null) {
ret.put_node(agreed_payload_type.to_xml());
} else {
foreach (PayloadType payload_type in payload_types) {
ret.put_node(payload_type.to_xml());
}
}
foreach (HeaderExtension ext in header_extensions) {
ret.put_node(ext.to_xml());
}
if (local_crypto != null) {
ret.put_node(new StanzaNode.build("encryption", NS_URI)
.put_node(local_crypto.to_xml()));
}
if (rtcp_mux) {
ret.put_node(new StanzaNode.build("rtcp-mux", NS_URI));
}
return ret;
}
}
public class Xmpp.Xep.JingleRtp.HeaderExtension {
public const string NS_URI = "urn:xmpp:jingle:apps:rtp:rtp-hdrext:0";
public const string NAME = "rtp-hdrext";
public uint8 id { get; private set; }
public string uri { get; private set; }
public HeaderExtension(uint8 id, string uri) {
this.id = id;
this.uri = uri;
}
public static HeaderExtension parse(StanzaNode node) {
return new HeaderExtension((uint8) node.get_attribute_int("id"), node.get_attribute("uri"));
}
public StanzaNode to_xml() {
return new StanzaNode.build(NAME, NS_URI)
.add_self_xmlns()
.put_attribute("id", id.to_string())
.put_attribute("uri", uri);
}
}
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