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-rw-r--r--plugins/ice/src/dtls_srtp.vala356
-rw-r--r--plugins/ice/src/module.vala55
-rw-r--r--plugins/ice/src/plugin.vala71
-rw-r--r--plugins/ice/src/register_plugin.vala3
-rw-r--r--plugins/ice/src/transport_parameters.vala345
-rw-r--r--plugins/ice/src/util.vala18
6 files changed, 848 insertions, 0 deletions
diff --git a/plugins/ice/src/dtls_srtp.vala b/plugins/ice/src/dtls_srtp.vala
new file mode 100644
index 00000000..0254351d
--- /dev/null
+++ b/plugins/ice/src/dtls_srtp.vala
@@ -0,0 +1,356 @@
+using GnuTLS;
+
+namespace Dino.Plugins.Ice.DtlsSrtp {
+
+public class CredentialsCapsule {
+ public uint8[] own_fingerprint;
+ public X509.Certificate[] own_cert;
+ public X509.PrivateKey private_key;
+}
+
+public class Handler {
+
+ public signal void send_data(uint8[] data);
+
+ public bool ready { get {
+ return srtp_session.has_encrypt && srtp_session.has_decrypt;
+ }}
+
+ public Mode mode { get; set; default = Mode.CLIENT; }
+ public uint8[] own_fingerprint { get; private set; }
+ public uint8[] peer_fingerprint { get; set; }
+ public string peer_fp_algo { get; set; }
+
+ private CredentialsCapsule credentials;
+ private Cond buffer_cond = Cond();
+ private Mutex buffer_mutex = Mutex();
+ private Gee.LinkedList<Bytes> buffer_queue = new Gee.LinkedList<Bytes>();
+
+ private bool running = false;
+ private bool stop = false;
+ private bool restart = false;
+
+ private Crypto.Srtp.Session srtp_session = new Crypto.Srtp.Session();
+
+ public Handler.with_cert(CredentialsCapsule creds) {
+ this.credentials = creds;
+ this.own_fingerprint = creds.own_fingerprint;
+ }
+
+ public uint8[]? process_incoming_data(uint component_id, uint8[] data) {
+ if (srtp_session.has_decrypt) {
+ try {
+ if (component_id == 1) {
+ if (data.length >= 2 && data[1] >= 192 && data[1] < 224) {
+ return srtp_session.decrypt_rtcp(data);
+ }
+ return srtp_session.decrypt_rtp(data);
+ }
+ if (component_id == 2) return srtp_session.decrypt_rtcp(data);
+ } catch (Error e) {
+ warning("%s (%d)", e.message, e.code);
+ return null;
+ }
+ } else if (component_id == 1) {
+ on_data_rec(data);
+ }
+ return null;
+ }
+
+ public uint8[]? process_outgoing_data(uint component_id, uint8[] data) {
+ if (srtp_session.has_encrypt) {
+ try {
+ if (component_id == 1) {
+ if (data.length >= 2 && data[1] >= 192 && data[1] < 224) {
+ return srtp_session.encrypt_rtcp(data);
+ }
+ return srtp_session.encrypt_rtp(data);
+ }
+ if (component_id == 2) return srtp_session.encrypt_rtcp(data);
+ } catch (Error e) {
+ warning("%s (%d)", e.message, e.code);
+ return null;
+ }
+ }
+ return null;
+ }
+
+ public void on_data_rec(owned uint8[] data) {
+ buffer_mutex.lock();
+ buffer_queue.add(new Bytes.take(data));
+ buffer_cond.signal();
+ buffer_mutex.unlock();
+ }
+
+ internal static CredentialsCapsule generate_credentials() throws GLib.Error {
+ int err = 0;
+
+ X509.PrivateKey private_key = X509.PrivateKey.create();
+ err = private_key.generate(PKAlgorithm.RSA, 2048);
+ throw_if_error(err);
+
+ var start_time = new DateTime.now_local().add_days(1);
+ var end_time = start_time.add_days(2);
+
+ X509.Certificate cert = X509.Certificate.create();
+ cert.set_key(private_key);
+ cert.set_version(1);
+ cert.set_activation_time ((time_t) start_time.to_unix ());
+ cert.set_expiration_time ((time_t) end_time.to_unix ());
+
+ uint32 serial = 1;
+ cert.set_serial(&serial, sizeof(uint32));
+
+ cert.sign(cert, private_key);
+
+ uint8[] own_fingerprint = get_fingerprint(cert, DigestAlgorithm.SHA256);
+ X509.Certificate[] own_cert = new X509.Certificate[] { (owned)cert };
+
+ var creds = new CredentialsCapsule();
+ creds.own_fingerprint = own_fingerprint;
+ creds.own_cert = (owned) own_cert;
+ creds.private_key = (owned) private_key;
+
+ return creds;
+ }
+
+ public void stop_dtls_connection() {
+ buffer_mutex.lock();
+ stop = true;
+ buffer_cond.signal();
+ buffer_mutex.unlock();
+ }
+
+ public async Xmpp.Xep.Jingle.ContentEncryption? setup_dtls_connection() {
+ buffer_mutex.lock();
+ if (stop) {
+ restart = true;
+ buffer_mutex.unlock();
+ return null;
+ }
+ if (running || ready) {
+ buffer_mutex.unlock();
+ return null;
+ }
+ running = true;
+ restart = false;
+ buffer_mutex.unlock();
+
+ InitFlags server_or_client = mode == Mode.SERVER ? InitFlags.SERVER : InitFlags.CLIENT;
+ debug("Setting up DTLS connection. We're %s", mode.to_string());
+
+ CertificateCredentials cert_cred = CertificateCredentials.create();
+ int err = cert_cred.set_x509_key(credentials.own_cert, credentials.private_key);
+ throw_if_error(err);
+
+ Session? session = Session.create(server_or_client | InitFlags.DATAGRAM);
+ session.enable_heartbeat(1);
+ session.set_srtp_profile_direct("SRTP_AES128_CM_HMAC_SHA1_80");
+ session.set_credentials(GnuTLS.CredentialsType.CERTIFICATE, cert_cred);
+ session.server_set_request(CertificateRequest.REQUEST);
+ session.set_priority_from_string("NORMAL:!VERS-TLS-ALL:+VERS-DTLS-ALL:+CTYPE-CLI-X509");
+
+ session.set_transport_pointer(this);
+ session.set_pull_function(pull_function);
+ session.set_pull_timeout_function(pull_timeout_function);
+ session.set_push_function(push_function);
+ session.set_verify_function(verify_function);
+
+ Thread<int> thread = new Thread<int> (null, () => {
+ DateTime maximum_time = new DateTime.now_utc().add_seconds(20);
+ do {
+ err = session.handshake();
+
+ DateTime current_time = new DateTime.now_utc();
+ if (maximum_time.compare(current_time) < 0) {
+ warning("DTLS handshake timeouted");
+ err = ErrorCode.APPLICATION_ERROR_MIN + 1;
+ break;
+ }
+ if (stop) {
+ debug("DTLS handshake stopped");
+ err = ErrorCode.APPLICATION_ERROR_MIN + 2;
+ break;
+ }
+ } while (err < 0 && !((ErrorCode)err).is_fatal());
+ Idle.add(setup_dtls_connection.callback);
+ return err;
+ });
+ yield;
+ err = thread.join();
+ buffer_mutex.lock();
+ if (stop) {
+ stop = false;
+ running = false;
+ bool restart = restart;
+ buffer_mutex.unlock();
+ if (restart) {
+ debug("Restarting DTLS handshake");
+ return yield setup_dtls_connection();
+ }
+ return null;
+ }
+ buffer_mutex.unlock();
+ if (err != ErrorCode.SUCCESS) {
+ warning("DTLS handshake failed: %s", ((ErrorCode)err).to_string());
+ return null;
+ }
+
+ uint8[] km = new uint8[150];
+ Datum? client_key, client_salt, server_key, server_salt;
+ session.get_srtp_keys(km, km.length, out client_key, out client_salt, out server_key, out server_salt);
+ if (client_key == null || client_salt == null || server_key == null || server_salt == null) {
+ warning("SRTP client/server key/salt null");
+ }
+
+ debug("Finished DTLS connection. We're %s", mode.to_string());
+ if (mode == Mode.SERVER) {
+ srtp_session.set_encryption_key(Crypto.Srtp.AES_CM_128_HMAC_SHA1_80, server_key.extract(), server_salt.extract());
+ srtp_session.set_decryption_key(Crypto.Srtp.AES_CM_128_HMAC_SHA1_80, client_key.extract(), client_salt.extract());
+ } else {
+ srtp_session.set_encryption_key(Crypto.Srtp.AES_CM_128_HMAC_SHA1_80, client_key.extract(), client_salt.extract());
+ srtp_session.set_decryption_key(Crypto.Srtp.AES_CM_128_HMAC_SHA1_80, server_key.extract(), server_salt.extract());
+ }
+ return new Xmpp.Xep.Jingle.ContentEncryption() { encryption_ns=Xmpp.Xep.JingleIceUdp.DTLS_NS_URI, encryption_name = "DTLS-SRTP", our_key=credentials.own_fingerprint, peer_key=peer_fingerprint };
+ }
+
+ private static ssize_t pull_function(void* transport_ptr, uint8[] buffer) {
+ Handler self = transport_ptr as Handler;
+
+ self.buffer_mutex.lock();
+ while (self.buffer_queue.size == 0) {
+ self.buffer_cond.wait(self.buffer_mutex);
+ if (self.stop) {
+ self.buffer_mutex.unlock();
+ debug("DTLS handshake pull_function stopped");
+ return -1;
+ }
+ }
+ Bytes data = self.buffer_queue.remove_at(0);
+ self.buffer_mutex.unlock();
+
+ uint8[] data_uint8 = Bytes.unref_to_data((owned) data);
+ Memory.copy(buffer, data_uint8, data_uint8.length);
+
+ // The callback should return 0 on connection termination, a positive number indicating the number of bytes received, and -1 on error.
+ return (ssize_t)data_uint8.length;
+ }
+
+ private static int pull_timeout_function(void* transport_ptr, uint ms) {
+ Handler self = transport_ptr as Handler;
+
+ int64 end_time = get_monotonic_time() + ms * 1000;
+
+ self.buffer_mutex.lock();
+ while (self.buffer_queue.size == 0) {
+ self.buffer_cond.wait_until(self.buffer_mutex, end_time);
+ if (self.stop) {
+ self.buffer_mutex.unlock();
+ debug("DTLS handshake pull_timeout_function stopped");
+ return -1;
+ }
+
+ if (get_monotonic_time() > end_time) {
+ self.buffer_mutex.unlock();
+ return 0;
+ }
+ }
+ self.buffer_mutex.unlock();
+
+ // The callback should return 0 on timeout, a positive number if data can be received, and -1 on error.
+ return 1;
+ }
+
+ private static ssize_t push_function(void* transport_ptr, uint8[] buffer) {
+ Handler self = transport_ptr as Handler;
+ self.send_data(buffer);
+
+ // The callback should return a positive number indicating the bytes sent, and -1 on error.
+ return (ssize_t)buffer.length;
+ }
+
+ private static int verify_function(Session session) {
+ Handler self = session.get_transport_pointer() as Handler;
+ try {
+ bool valid = self.verify_peer_cert(session);
+ if (!valid) {
+ warning("DTLS certificate invalid. Aborting handshake.");
+ return 1;
+ }
+ } catch (Error e) {
+ warning("Error during DTLS certificate validation: %s. Aborting handshake.", e.message);
+ return 1;
+ }
+
+ // The callback function should return 0 for the handshake to continue or non-zero to terminate.
+ return 0;
+ }
+
+ private bool verify_peer_cert(Session session) throws GLib.Error {
+ unowned Datum[] cert_datums = session.get_peer_certificates();
+ if (cert_datums.length == 0) {
+ warning("No peer certs");
+ return false;
+ }
+ if (cert_datums.length > 1) warning("More than one peer cert");
+
+ X509.Certificate peer_cert = X509.Certificate.create();
+ peer_cert.import(ref cert_datums[0], CertificateFormat.DER);
+
+ DigestAlgorithm algo;
+ switch (peer_fp_algo) {
+ case "sha-256":
+ algo = DigestAlgorithm.SHA256;
+ break;
+ default:
+ warning("Unkown peer fingerprint algorithm: %s", peer_fp_algo);
+ return false;
+ }
+
+ uint8[] real_peer_fp = get_fingerprint(peer_cert, algo);
+
+ if (real_peer_fp.length != this.peer_fingerprint.length) {
+ warning("Fingerprint lengths not equal %i vs %i", real_peer_fp.length, peer_fingerprint.length);
+ return false;
+ }
+
+ for (int i = 0; i < real_peer_fp.length; i++) {
+ if (real_peer_fp[i] != this.peer_fingerprint[i]) {
+ warning("First cert in peer cert list doesn't equal advertised one: %s vs %s", format_fingerprint(real_peer_fp), format_fingerprint(peer_fingerprint));
+ return false;
+ }
+ }
+
+ return true;
+ }
+}
+
+private uint8[] get_fingerprint(X509.Certificate certificate, DigestAlgorithm digest_algo) {
+ uint8[] buf = new uint8[512];
+ size_t buf_out_size = 512;
+ certificate.get_fingerprint(digest_algo, buf, ref buf_out_size);
+
+ uint8[] ret = new uint8[buf_out_size];
+ for (int i = 0; i < buf_out_size; i++) {
+ ret[i] = buf[i];
+ }
+ return ret;
+}
+
+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;
+}
+
+
+public enum Mode {
+ CLIENT, SERVER
+}
+
+}
diff --git a/plugins/ice/src/module.vala b/plugins/ice/src/module.vala
new file mode 100644
index 00000000..2645d7dc
--- /dev/null
+++ b/plugins/ice/src/module.vala
@@ -0,0 +1,55 @@
+using Gee;
+using Xmpp;
+using Xmpp.Xep;
+
+public class Dino.Plugins.Ice.Module : JingleIceUdp.Module {
+
+ public string? stun_ip = null;
+ public uint stun_port = 0;
+ public string? turn_ip = null;
+ public Xep.ExternalServiceDiscovery.Service? turn_service = null;
+
+ private weak Nice.Agent? agent;
+ private HashMap<string, DtlsSrtp.CredentialsCapsule> cerds = new HashMap<string, DtlsSrtp.CredentialsCapsule>();
+
+ private Nice.Agent get_agent() {
+ Nice.Agent? agent = this.agent;
+ if (agent == null) {
+ agent = new Nice.Agent(MainContext.@default(), Nice.Compatibility.RFC5245);
+ if (stun_ip != null) {
+ agent.stun_server = stun_ip;
+ agent.stun_server_port = stun_port;
+ }
+ agent.ice_tcp = false;
+ agent.set_software("Dino");
+ agent.weak_ref(agent_unweak);
+ this.agent = agent;
+ debug("STUN server for libnice %s %u", agent.stun_server, agent.stun_server_port);
+ }
+ return agent;
+ }
+
+ public override Jingle.TransportParameters create_transport_parameters(XmppStream stream, uint8 components, Jid local_full_jid, Jid peer_full_jid) {
+ DtlsSrtp.CredentialsCapsule? cred = get_create_credentials(local_full_jid, peer_full_jid);
+ return new TransportParameters(get_agent(), cred, turn_service, turn_ip, components, local_full_jid, peer_full_jid);
+ }
+
+ public override Jingle.TransportParameters parse_transport_parameters(XmppStream stream, uint8 components, Jid local_full_jid, Jid peer_full_jid, StanzaNode transport) throws Jingle.IqError {
+ DtlsSrtp.CredentialsCapsule? cred = get_create_credentials(local_full_jid, peer_full_jid);
+ return new TransportParameters(get_agent(), cred, turn_service, turn_ip, components, local_full_jid, peer_full_jid, transport);
+ }
+
+ private DtlsSrtp.CredentialsCapsule? get_create_credentials(Jid local_full_jid, Jid peer_full_jid) {
+ string from_to_id = local_full_jid.to_string() + peer_full_jid.to_string();
+ try {
+ if (!cerds.has_key(from_to_id)) cerds[from_to_id] = DtlsSrtp.Handler.generate_credentials();
+ } catch (Error e) {
+ warning("Error creating dtls credentials: %s", e.message);
+ }
+ return cerds[from_to_id];
+ }
+
+ private void agent_unweak() {
+ this.agent = null;
+ }
+} \ No newline at end of file
diff --git a/plugins/ice/src/plugin.vala b/plugins/ice/src/plugin.vala
new file mode 100644
index 00000000..3ee8a72a
--- /dev/null
+++ b/plugins/ice/src/plugin.vala
@@ -0,0 +1,71 @@
+using Gee;
+using Dino.Entities;
+using Xmpp;
+using Xmpp.Xep;
+
+private extern const size_t NICE_ADDRESS_STRING_LEN;
+
+public class Dino.Plugins.Ice.Plugin : RootInterface, Object {
+ public Dino.Application app;
+
+ public void registered(Dino.Application app) {
+ Nice.debug_enable(true);
+ this.app = app;
+ app.stream_interactor.module_manager.initialize_account_modules.connect((account, list) => {
+ list.add(new Module());
+ });
+ app.stream_interactor.stream_attached_modules.connect((account, stream) => {
+ stream.get_module(Socks5Bytestreams.Module.IDENTITY).set_local_ip_address_handler(get_local_ip_addresses);
+ });
+ app.stream_interactor.stream_negotiated.connect(on_stream_negotiated);
+ }
+
+ private async void on_stream_negotiated(Account account, XmppStream stream) {
+ Module? ice_udp_module = stream.get_module(JingleIceUdp.Module.IDENTITY) as Module;
+ if (ice_udp_module == null) return;
+ Gee.List<Xep.ExternalServiceDiscovery.Service> services = yield ExternalServiceDiscovery.request_services(stream);
+ foreach (Xep.ExternalServiceDiscovery.Service service in services) {
+ if (service.transport == "udp" && (service.ty == "stun" || service.ty == "turn")) {
+ InetAddress ip = yield lookup_ipv4_addess(service.host);
+ if (ip == null) continue;
+
+ if (service.ty == "stun") {
+ debug("Server offers STUN server: %s:%u, resolved to %s", service.host, service.port, ip.to_string());
+ ice_udp_module.stun_ip = ip.to_string();
+ ice_udp_module.stun_port = service.port;
+ } else if (service.ty == "turn") {
+ debug("Server offers TURN server: %s:%u, resolved to %s", service.host, service.port, ip.to_string());
+ ice_udp_module.turn_ip = ip.to_string();
+ ice_udp_module.turn_service = service;
+ }
+ }
+ }
+ if (ice_udp_module.stun_ip == null) {
+ InetAddress ip = yield lookup_ipv4_addess("stun.l.google.com");
+ if (ip == null) return;
+
+ debug("Using fallback STUN server: stun.l.google.com:19302, resolved to %s", ip.to_string());
+
+ ice_udp_module.stun_ip = ip.to_string();
+ ice_udp_module.stun_port = 19302;
+ }
+ }
+
+ public void shutdown() {
+ // Nothing to do
+ }
+
+ private async InetAddress? lookup_ipv4_addess(string host) {
+ try {
+ Resolver resolver = Resolver.get_default();
+ GLib.List<GLib.InetAddress>? ips = yield resolver.lookup_by_name_async(host);
+ foreach (GLib.InetAddress ina in ips) {
+ if (ina.get_family() != SocketFamily.IPV4) continue;
+ return ina;
+ }
+ } catch (Error e) {
+ warning("Failed looking up IP address of %s", host);
+ }
+ return null;
+ }
+} \ No newline at end of file
diff --git a/plugins/ice/src/register_plugin.vala b/plugins/ice/src/register_plugin.vala
new file mode 100644
index 00000000..b2ed56c1
--- /dev/null
+++ b/plugins/ice/src/register_plugin.vala
@@ -0,0 +1,3 @@
+public Type register_plugin(Module module) {
+ return typeof (Dino.Plugins.Ice.Plugin);
+}
diff --git a/plugins/ice/src/transport_parameters.vala b/plugins/ice/src/transport_parameters.vala
new file mode 100644
index 00000000..62c04906
--- /dev/null
+++ b/plugins/ice/src/transport_parameters.vala
@@ -0,0 +1,345 @@
+using Gee;
+using Xmpp;
+using Xmpp.Xep;
+
+
+public class Dino.Plugins.Ice.TransportParameters : JingleIceUdp.IceUdpTransportParameters {
+ private Nice.Agent agent;
+ private uint stream_id;
+ private bool we_want_connection;
+ private bool remote_credentials_set;
+ private Map<uint8, DatagramConnection> connections = new HashMap<uint8, DatagramConnection>();
+ private DtlsSrtp.Handler? dtls_srtp_handler;
+
+ private class DatagramConnection : Jingle.DatagramConnection {
+ private Nice.Agent agent;
+ private DtlsSrtp.Handler? dtls_srtp_handler;
+ private uint stream_id;
+ private string? error;
+ private ulong sent;
+ private ulong sent_reported;
+ private ulong recv;
+ private ulong recv_reported;
+ private ulong datagram_received_id;
+
+ public DatagramConnection(Nice.Agent agent, DtlsSrtp.Handler? dtls_srtp_handler, uint stream_id, uint8 component_id) {
+ this.agent = agent;
+ this.dtls_srtp_handler = dtls_srtp_handler;
+ this.stream_id = stream_id;
+ this.component_id = component_id;
+ this.datagram_received_id = this.datagram_received.connect((datagram) => {
+ recv += datagram.length;
+ if (recv > recv_reported + 100000) {
+ debug("Received %lu bytes via stream %u component %u", recv, stream_id, component_id);
+ recv_reported = recv;
+ }
+ });
+ }
+
+ public override async void terminate(bool we_terminated, string? reason_string = null, string? reason_text = null) {
+ yield base.terminate(we_terminated, reason_string, reason_text);
+ this.disconnect(datagram_received_id);
+ agent = null;
+ dtls_srtp_handler = null;
+ }
+
+ public override void send_datagram(Bytes datagram) {
+ if (this.agent != null && is_component_ready(agent, stream_id, component_id)) {
+ uint8[] encrypted_data = null;
+ if (dtls_srtp_handler != null) {
+ encrypted_data = dtls_srtp_handler.process_outgoing_data(component_id, datagram.get_data());
+ if (encrypted_data == null) return;
+ }
+ agent.send(stream_id, component_id, encrypted_data ?? datagram.get_data());
+ sent += datagram.length;
+ if (sent > sent_reported + 100000) {
+ debug("Sent %lu bytes via stream %u component %u", sent, stream_id, component_id);
+ sent_reported = sent;
+ }
+ }
+ }
+ }
+
+ public TransportParameters(Nice.Agent agent, DtlsSrtp.CredentialsCapsule? credentials, Xep.ExternalServiceDiscovery.Service? turn_service, string? turn_ip, uint8 components, Jid local_full_jid, Jid peer_full_jid, StanzaNode? node = null) {
+ base(components, local_full_jid, peer_full_jid, node);
+ this.we_want_connection = (node == null);
+ this.agent = agent;
+
+ if (this.peer_fingerprint != null || !incoming) {
+ dtls_srtp_handler = setup_dtls(this, credentials);
+ own_fingerprint = dtls_srtp_handler.own_fingerprint;
+ if (incoming) {
+ own_setup = "active";
+ dtls_srtp_handler.mode = DtlsSrtp.Mode.CLIENT;
+ dtls_srtp_handler.peer_fingerprint = peer_fingerprint;
+ dtls_srtp_handler.peer_fp_algo = peer_fp_algo;
+ } else {
+ own_setup = "actpass";
+ dtls_srtp_handler.mode = DtlsSrtp.Mode.SERVER;
+ dtls_srtp_handler.setup_dtls_connection.begin((_, res) => {
+ var content_encryption = dtls_srtp_handler.setup_dtls_connection.end(res);
+ if (content_encryption != null) {
+ this.content.encryptions[content_encryption.encryption_ns] = content_encryption;
+ }
+ });
+ }
+ }
+
+ agent.candidate_gathering_done.connect(on_candidate_gathering_done);
+ agent.initial_binding_request_received.connect(on_initial_binding_request_received);
+ agent.component_state_changed.connect(on_component_state_changed);
+ agent.new_selected_pair_full.connect(on_new_selected_pair_full);
+ agent.new_candidate_full.connect(on_new_candidate);
+
+ agent.controlling_mode = !incoming;
+ stream_id = agent.add_stream(components);
+
+ if (turn_ip != null) {
+ for (uint8 component_id = 1; component_id <= components; component_id++) {
+ agent.set_relay_info(stream_id, component_id, turn_ip, turn_service.port, turn_service.username, turn_service.password, Nice.RelayType.UDP);
+ debug("TURN info (component %i) %s:%u", component_id, turn_ip, turn_service.port);
+ }
+ }
+ string ufrag;
+ string pwd;
+ agent.get_local_credentials(stream_id, out ufrag, out pwd);
+ init(ufrag, pwd);
+
+ for (uint8 component_id = 1; component_id <= components; component_id++) {
+ // We don't properly get local candidates before this call
+ agent.attach_recv(stream_id, component_id, MainContext.@default(), on_recv);
+ }
+
+ agent.gather_candidates(stream_id);
+ }
+
+ private static DtlsSrtp.Handler setup_dtls(TransportParameters tp, DtlsSrtp.CredentialsCapsule credentials) {
+ var weak_self = WeakRef(tp);
+ DtlsSrtp.Handler dtls_srtp = new DtlsSrtp.Handler.with_cert(credentials);
+ dtls_srtp.send_data.connect((data) => {
+ TransportParameters self = (TransportParameters) weak_self.get();
+ if (self != null) self.agent.send(self.stream_id, 1, data);
+ });
+ return dtls_srtp;
+ }
+
+ private void on_candidate_gathering_done(uint stream_id) {
+ if (stream_id != this.stream_id) return;
+ debug("on_candidate_gathering_done in %u", stream_id);
+
+ for (uint8 i = 1; i <= components; i++) {
+ foreach (unowned Nice.Candidate nc in agent.get_local_candidates(stream_id, i)) {
+ if (nc.transport == Nice.CandidateTransport.UDP) {
+ JingleIceUdp.Candidate? candidate = candidate_to_jingle(nc);
+ if (candidate == null) continue;
+ debug("Local candidate summary: %s", agent.generate_local_candidate_sdp(nc));
+ }
+ }
+ }
+ }
+
+ private void on_new_candidate(Nice.Candidate nc) {
+ if (nc.stream_id != stream_id) return;
+ JingleIceUdp.Candidate? candidate = candidate_to_jingle(nc);
+ if (candidate == null) return;
+
+ if (nc.transport == Nice.CandidateTransport.UDP) {
+ // Execution was in the agent thread before
+ add_local_candidate_threadsafe(candidate);
+ }
+ }
+
+ public override void handle_transport_accept(StanzaNode transport) throws Jingle.IqError {
+ debug("on_transport_accept from %s", peer_full_jid.to_string());
+ base.handle_transport_accept(transport);
+
+ if (dtls_srtp_handler != null && peer_fingerprint != null) {
+ dtls_srtp_handler.peer_fingerprint = peer_fingerprint;
+ dtls_srtp_handler.peer_fp_algo = peer_fp_algo;
+ if (peer_setup == "passive") {
+ dtls_srtp_handler.mode = DtlsSrtp.Mode.CLIENT;
+ dtls_srtp_handler.stop_dtls_connection();
+ dtls_srtp_handler.setup_dtls_connection.begin((_, res) => {
+ var content_encryption = dtls_srtp_handler.setup_dtls_connection.end(res);
+ if (content_encryption != null) {
+ this.content.encryptions[content_encryption.encryption_ns] = content_encryption;
+ }
+ });
+ }
+ } else {
+ dtls_srtp_handler = null;
+ }
+ }
+
+ public override void handle_transport_info(StanzaNode transport) throws Jingle.IqError {
+ debug("on_transport_info from %s", peer_full_jid.to_string());
+ base.handle_transport_info(transport);
+
+ if (!we_want_connection) return;
+
+ if (remote_ufrag != null && remote_pwd != null && !remote_credentials_set) {
+ agent.set_remote_credentials(stream_id, remote_ufrag, remote_pwd);
+ remote_credentials_set = true;
+ }
+ for (uint8 i = 1; i <= components; i++) {
+ SList<Nice.Candidate> candidates = new SList<Nice.Candidate>();
+ foreach (JingleIceUdp.Candidate candidate in remote_candidates) {
+ if (candidate.component == i) {
+ candidates.append(candidate_to_nice(candidate));
+ }
+ }
+ int new_candidates = agent.set_remote_candidates(stream_id, i, candidates);
+ debug("Updated to %i remote candidates for candidate %u via transport info", new_candidates, i);
+ }
+ }
+
+ public override void create_transport_connection(XmppStream stream, Jingle.Content content) {
+ debug("create_transport_connection: %s", content.session.sid);
+ debug("local_credentials: %s %s", local_ufrag, local_pwd);
+ debug("remote_credentials: %s %s", remote_ufrag, remote_pwd);
+ debug("expected incoming credentials: %s %s", local_ufrag + ":" + remote_ufrag, local_pwd);
+ debug("expected outgoing credentials: %s %s", remote_ufrag + ":" + local_ufrag, remote_pwd);
+
+ we_want_connection = true;
+
+ if (remote_ufrag != null && remote_pwd != null && !remote_credentials_set) {
+ agent.set_remote_credentials(stream_id, remote_ufrag, remote_pwd);
+ remote_credentials_set = true;
+ }
+ for (uint8 i = 1; i <= components; i++) {
+ SList<Nice.Candidate> candidates = new SList<Nice.Candidate>();
+ foreach (JingleIceUdp.Candidate candidate in remote_candidates) {
+ if (candidate.ip.has_prefix("fe80::")) continue;
+ if (candidate.component == i) {
+ candidates.append(candidate_to_nice(candidate));
+ debug("remote candidate: %s", agent.generate_local_candidate_sdp(candidate_to_nice(candidate)));
+ }
+ }
+ int new_candidates = agent.set_remote_candidates(stream_id, i, candidates);
+ debug("Initiated component %u with %i remote candidates", i, new_candidates);
+
+ connections[i] = new DatagramConnection(agent, dtls_srtp_handler, stream_id, i);
+ content.set_transport_connection(connections[i], i);
+ }
+
+ base.create_transport_connection(stream, content);
+ }
+
+ private void on_component_state_changed(uint stream_id, uint component_id, uint state) {
+ if (stream_id != this.stream_id) return;
+ debug("stream %u component %u state changed to %s", stream_id, component_id, agent.get_component_state(stream_id, component_id).to_string());
+ may_consider_ready(stream_id, component_id);
+ if (incoming && dtls_srtp_handler != null && !dtls_srtp_handler.ready && is_component_ready(agent, stream_id, component_id) && dtls_srtp_handler.mode == DtlsSrtp.Mode.CLIENT) {
+ dtls_srtp_handler.setup_dtls_connection.begin((_, res) => {
+ Jingle.ContentEncryption? encryption = dtls_srtp_handler.setup_dtls_connection.end(res);
+ if (encryption != null) {
+ this.content.encryptions[encryption.encryption_ns] = encryption;
+ }
+ });
+ }
+ }
+
+ private void may_consider_ready(uint stream_id, uint component_id) {
+ if (stream_id != this.stream_id) return;
+ if (connections.has_key((uint8) component_id) && !connections[(uint8)component_id].ready && is_component_ready(agent, stream_id, component_id) && (dtls_srtp_handler == null || dtls_srtp_handler.ready)) {
+ connections[(uint8)component_id].ready = true;
+ }
+ }
+
+ private void on_initial_binding_request_received(uint stream_id) {
+ if (stream_id != this.stream_id) return;
+ debug("initial_binding_request_received");
+ }
+
+ private void on_new_selected_pair_full(uint stream_id, uint component_id, Nice.Candidate p1, Nice.Candidate p2) {
+ if (stream_id != this.stream_id) return;
+ debug("new_selected_pair_full %u [%s, %s]", component_id, agent.generate_local_candidate_sdp(p1), agent.generate_local_candidate_sdp(p2));
+ }
+
+ private void on_recv(Nice.Agent agent, uint stream_id, uint component_id, uint8[] data) {
+ if (stream_id != this.stream_id) return;
+ uint8[] decrypt_data = null;
+ if (dtls_srtp_handler != null) {
+ decrypt_data = dtls_srtp_handler.process_incoming_data(component_id, data);
+ if (decrypt_data == null) return;
+ }
+ may_consider_ready(stream_id, component_id);
+ if (connections.has_key((uint8) component_id)) {
+ if (!connections[(uint8) component_id].ready) {
+ debug("on_recv stream %u component %u when state %s", stream_id, component_id, agent.get_component_state(stream_id, component_id).to_string());
+ }
+ connections[(uint8) component_id].datagram_received(new Bytes(decrypt_data ?? data));
+ } else {
+ debug("on_recv stream %u component %u length %u", stream_id, component_id, data.length);
+ }
+ }
+
+ private static Nice.Candidate candidate_to_nice(JingleIceUdp.Candidate c) {
+ Nice.CandidateType type;
+ switch (c.type_) {
+ case JingleIceUdp.Candidate.Type.HOST: type = Nice.CandidateType.HOST; break;
+ case JingleIceUdp.Candidate.Type.PRFLX: type = Nice.CandidateType.PEER_REFLEXIVE; break;
+ case JingleIceUdp.Candidate.Type.RELAY: type = Nice.CandidateType.RELAYED; break;
+ case JingleIceUdp.Candidate.Type.SRFLX: type = Nice.CandidateType.SERVER_REFLEXIVE; break;
+ default: assert_not_reached();
+ }
+
+ Nice.Candidate candidate = new Nice.Candidate(type);
+ candidate.component_id = c.component;
+ char[] foundation = new char[Nice.CANDIDATE_MAX_FOUNDATION];
+ Memory.copy(foundation, c.foundation.data, size_t.min(c.foundation.length, Nice.CANDIDATE_MAX_FOUNDATION - 1));
+ candidate.foundation = foundation;
+ candidate.addr = Nice.Address();
+ candidate.addr.init();
+ candidate.addr.set_from_string(c.ip);
+ candidate.addr.set_port(c.port);
+ candidate.priority = c.priority;
+ if (c.rel_addr != null) {
+ candidate.base_addr = Nice.Address();
+ candidate.base_addr.init();
+ candidate.base_addr.set_from_string(c.rel_addr);
+ candidate.base_addr.set_port(c.rel_port);
+ }
+ candidate.transport = Nice.CandidateTransport.UDP;
+ return candidate;
+ }
+
+ private static JingleIceUdp.Candidate? candidate_to_jingle(Nice.Candidate nc) {
+ JingleIceUdp.Candidate candidate = new JingleIceUdp.Candidate();
+ switch (nc.type) {
+ case Nice.CandidateType.HOST: candidate.type_ = JingleIceUdp.Candidate.Type.HOST; break;
+ case Nice.CandidateType.PEER_REFLEXIVE: candidate.type_ = JingleIceUdp.Candidate.Type.PRFLX; break;
+ case Nice.CandidateType.RELAYED: candidate.type_ = JingleIceUdp.Candidate.Type.RELAY; break;
+ case Nice.CandidateType.SERVER_REFLEXIVE: candidate.type_ = JingleIceUdp.Candidate.Type.SRFLX; break;
+ default: assert_not_reached();
+ }
+ candidate.component = (uint8) nc.component_id;
+ candidate.foundation = ((string)nc.foundation).dup();
+ candidate.generation = 0;
+ candidate.id = Random.next_int().to_string("%08x"); // TODO
+
+ char[] res = new char[NICE_ADDRESS_STRING_LEN];
+ nc.addr.to_string(res);
+ candidate.ip = (string) res;
+ candidate.network = 0; // TODO
+ candidate.port = (uint16) nc.addr.get_port();
+ candidate.priority = nc.priority;
+ candidate.protocol = "udp";
+ if (nc.base_addr.is_valid() && !nc.base_addr.equal(nc.addr)) {
+ res = new char[NICE_ADDRESS_STRING_LEN];
+ nc.base_addr.to_string(res);
+ candidate.rel_addr = (string) res;
+ candidate.rel_port = (uint16) nc.base_addr.get_port();
+ }
+ if (candidate.ip.has_prefix("fe80::")) return null;
+
+ return candidate;
+ }
+
+ public override void dispose() {
+ base.dispose();
+ agent = null;
+ dtls_srtp_handler = null;
+ connections.clear();
+ }
+}
diff --git a/plugins/ice/src/util.vala b/plugins/ice/src/util.vala
new file mode 100644
index 00000000..dd89d2f4
--- /dev/null
+++ b/plugins/ice/src/util.vala
@@ -0,0 +1,18 @@
+using Gee;
+
+namespace Dino.Plugins.Ice {
+
+internal static bool is_component_ready(Nice.Agent agent, uint stream_id, uint component_id) {
+ var state = agent.get_component_state(stream_id, component_id);
+ return state == Nice.ComponentState.CONNECTED || state == Nice.ComponentState.READY;
+}
+
+internal Gee.List<string> get_local_ip_addresses() {
+ Gee.List<string> result = new ArrayList<string>();
+ foreach (string ip_address in Nice.interfaces_get_local_ips(false)) {
+ result.add(ip_address);
+ }
+ return result;
+}
+
+} \ No newline at end of file
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-03 14:37:37 +0000