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using Gee;
using Xmpp.Xep;
using Xmpp;
public abstract class Xmpp.Xep.JingleIceUdp.IceUdpTransportParameters : Jingle.TransportParameters, Object {
public string ns_uri { get { return NS_URI; } }
public string remote_pwd { get; private set; }
public string remote_ufrag { get; private set; }
public string local_pwd { get; private set; }
public string local_ufrag { get; private set; }
public ConcurrentList<Candidate> local_candidates = new ConcurrentList<Candidate>(Candidate.equals_func);
public ConcurrentList<Candidate> unsent_local_candidates = new ConcurrentList<Candidate>(Candidate.equals_func);
public Gee.List<Candidate> remote_candidates = new ArrayList<Candidate>(Candidate.equals_func);
public uint8[]? own_fingerprint = null;
public string? own_setup = null;
public uint8[]? peer_fingerprint = null;
public string? peer_fp_algo = null;
public string? peer_setup = null;
public Jid local_full_jid { get; private set; }
public Jid peer_full_jid { get; private set; }
private uint8 components_;
public uint8 components { get { return components_; } }
public bool incoming { get; private set; default = false; }
private bool connection_created = false;
protected weak Jingle.Content? content = null;
protected bool use_raw = false;
protected IceUdpTransportParameters(uint8 components, Jid local_full_jid, Jid peer_full_jid, StanzaNode? node = null) {
this.components_ = components;
this.local_full_jid = local_full_jid;
this.peer_full_jid = peer_full_jid;
if (node != null) {
incoming = true;
remote_pwd = node.get_attribute("pwd");
remote_ufrag = node.get_attribute("ufrag");
foreach (StanzaNode candidateNode in node.get_subnodes("candidate")) {
remote_candidates.add(Candidate.parse(candidateNode));
}
StanzaNode? fingerprint_node = node.get_subnode("fingerprint", DTLS_NS_URI);
if (fingerprint_node != null) {
peer_fingerprint = fingerprint_to_bytes(fingerprint_node.get_string_content());
peer_fp_algo = fingerprint_node.get_attribute("hash");
peer_setup = fingerprint_node.get_attribute("setup");
}
}
}
public void init(string ufrag, string pwd) {
this.local_ufrag = ufrag;
this.local_pwd = pwd;
debug("Initialized for %s", pwd);
}
public void set_content(Jingle.Content content) {
this.content = content;
this.content.weak_ref(unset_content);
}
public void unset_content() {
this.content = null;
}
public StanzaNode to_transport_stanza_node(string action_type) {
var node = new StanzaNode.build("transport", NS_URI)
.add_self_xmlns()
.put_attribute("ufrag", local_ufrag)
.put_attribute("pwd", local_pwd);
if (own_fingerprint != null && action_type != "transport-info") {
var fingerprint_node = new StanzaNode.build("fingerprint", DTLS_NS_URI)
.add_self_xmlns()
.put_attribute("hash", "sha-256")
.put_node(new StanzaNode.text(format_fingerprint(own_fingerprint)));
fingerprint_node.put_attribute("setup", own_setup);
node.put_node(fingerprint_node);
}
if (action_type != "transport-info") {
foreach (Candidate candidate in unsent_local_candidates) {
node.put_node(candidate.to_xml());
}
unsent_local_candidates.clear();
} else if (!unsent_local_candidates.is_empty) {
Candidate candidate = unsent_local_candidates.first();
node.put_node(candidate.to_xml());
unsent_local_candidates.remove(candidate);
}
return node;
}
public virtual void handle_transport_accept(StanzaNode node) throws Jingle.IqError {
string? pwd = node.get_attribute("pwd");
string? ufrag = node.get_attribute("ufrag");
if (pwd != null) remote_pwd = pwd;
if (ufrag != null) remote_ufrag = ufrag;
foreach (StanzaNode candidateNode in node.get_subnodes("candidate")) {
remote_candidates.add(Candidate.parse(candidateNode));
}
StanzaNode? fingerprint_node = node.get_subnode("fingerprint", DTLS_NS_URI);
if (fingerprint_node != null) {
peer_fingerprint = fingerprint_to_bytes(fingerprint_node.get_string_content());
peer_fp_algo = fingerprint_node.get_attribute("hash");
peer_setup = fingerprint_node.get_attribute("setup");
}
}
public virtual void handle_transport_info(StanzaNode node) throws Jingle.IqError {
string? pwd = node.get_attribute("pwd");
string? ufrag = node.get_attribute("ufrag");
if (pwd != null) remote_pwd = pwd;
if (ufrag != null) remote_ufrag = ufrag;
foreach (StanzaNode candidateNode in node.get_subnodes("candidate")) {
remote_candidates.add(Candidate.parse(candidateNode));
}
}
public virtual void create_transport_connection(XmppStream stream, Jingle.Content content) {
connection_created = true;
check_send_transport_info();
}
public void add_local_candidate_threadsafe(Candidate candidate) {
if (local_candidates.contains(candidate)) return;
debug("New local candidate %u %s %s:%u", candidate.component, candidate.type_.to_string(), candidate.ip, candidate.port);
unsent_local_candidates.add(candidate);
local_candidates.add(candidate);
if (this.content != null && (this.connection_created || !this.incoming)) {
Idle.add( () => {
check_send_transport_info();
return Source.REMOVE;
});
}
}
private void check_send_transport_info() {
if (this.content != null && !unsent_local_candidates.is_empty) {
content.send_transport_info(to_transport_stanza_node("transport-info"));
}
}
private string format_fingerprint(uint8[] fingerprint) {
var sb = new StringBuilder();
for (int i = 0; i < fingerprint.length; i++) {
sb.append("%02X".printf(fingerprint[i]));
if (i < fingerprint.length - 1) {
sb.append(":");
}
}
return sb.str;
}
private uint8[]? fingerprint_to_bytes(string? fingerprint_) {
if (fingerprint_ == null) return null;
string fingerprint = fingerprint_.replace(":", "").up();
uint8[] bin = new uint8[fingerprint.length / 2];
const string HEX = "0123456789ABCDEF";
for (int i = 0; i < fingerprint.length / 2; i++) {
bin[i] = (uint8) (HEX.index_of_char(fingerprint[i*2]) << 4) | HEX.index_of_char(fingerprint[i*2+1]);
}
return bin;
}
}
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