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Refactor XmppStream, TLS and connection method logic

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fixes #534
This commit is contained in:
fiaxh 2020-11-16 15:55:33 +01:00
parent 881b9eec9d
commit 07917f1d84
17 changed files with 644 additions and 491 deletions
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197
libdino/src/service/connection_manager.vala
View file

@ -17,10 +17,12 @@ public class ConnectionManager : Object {
DISCONNECTED
}
private HashSet<Account> connection_todo = new HashSet<Account>(Account.hash_func, Account.equals_func);
private HashMap<Account, Connection> connections = new HashMap<Account, Connection>(Account.hash_func, Account.equals_func);
private HashMap<Account, ConnectionError> connection_errors = new HashMap<Account, ConnectionError>(Account.hash_func, Account.equals_func);
private HashMap<Account, bool> connection_ongoing = new HashMap<Account, bool>(Account.hash_func, Account.equals_func);
private HashMap<Account, bool> connection_directly_retry = new HashMap<Account, bool>(Account.hash_func, Account.equals_func);
private NetworkMonitor? network_monitor;
private Login1Manager? login1;
private ModuleManager module_manager;
@ -52,13 +54,45 @@ public class ConnectionManager : Object {
}
private class Connection {
public XmppStream stream { get; set; }
public string uuid { get; set; }
public XmppStream? stream { get; set; }
public ConnectionState connection_state { get; set; default = ConnectionState.DISCONNECTED; }
public DateTime established { get; set; }
public DateTime last_activity { get; set; }
public class Connection(XmppStream stream, DateTime established) {
this.stream = stream;
this.established = established;
public DateTime? established { get; set; }
public DateTime? last_activity { get; set; }
public Connection() {
reset();
}
public void reset() {
if (stream != null) {
stream.detach_modules();
stream.disconnect.begin();
}
stream = null;
established = last_activity = null;
uuid = Xmpp.random_uuid();
}
public void make_offline() {
Xmpp.Presence.Stanza presence = new Xmpp.Presence.Stanza();
presence.type_ = Xmpp.Presence.Stanza.TYPE_UNAVAILABLE;
if (stream != null) {
stream.get_module(Presence.Module.IDENTITY).send_presence(stream, presence);
}
}
public async void disconnect_account() {
make_offline();
if (stream != null) {
try {
yield stream.disconnect();
} catch (Error e) {
debug("Error disconnecting stream: %s", e.message);
}
}
}
}
@ -74,7 +108,7 @@ public class ConnectionManager : Object {
login1.PrepareForSleep.connect(on_prepare_for_sleep);
}
Timeout.add_seconds(60, () => {
foreach (Account account in connection_todo) {
foreach (Account account in connections.keys) {
if (connections[account].last_activity != null &&
connections[account].last_activity.compare(new DateTime.now_utc().add_minutes(-1)) < 0) {
check_reconnect(account);
@ -106,13 +140,16 @@ public class ConnectionManager : Object {
}
public Collection<Account> get_managed_accounts() {
return connection_todo;
return connections.keys;
}
public void connect_account(Account account) {
if (!connection_todo.contains(account)) connection_todo.add(account);
if (!connections.has_key(account)) {
connect_(account);
connections[account] = new Connection();
connection_ongoing[account] = false;
connection_directly_retry[account] = false;
connect_stream.begin(account);
} else {
check_reconnect(account);
}
@ -125,74 +162,98 @@ public class ConnectionManager : Object {
}
private void make_offline(Account account) {
Xmpp.Presence.Stanza presence = new Xmpp.Presence.Stanza();
presence.type_ = Xmpp.Presence.Stanza.TYPE_UNAVAILABLE;
connections[account].make_offline();
change_connection_state(account, ConnectionState.DISCONNECTED);
connections[account].stream.get_module(Presence.Module.IDENTITY).send_presence(connections[account].stream, presence);
}
public async void disconnect_account(Account account) {
if (connections.has_key(account)) {
make_offline(account);
try {
yield connections[account].stream.disconnect();
} catch (Error e) {
debug("Error disconnecting stream: %s", e.message);
}
connection_todo.remove(account);
if (connections.has_key(account)) {
connections[account].disconnect_account();
connections.unset(account);
}
}
}
private void connect_(Account account, string? resource = null) {
if (connections.has_key(account)) connections[account].stream.detach_modules();
private async void connect_stream(Account account, string? resource = null) {
if (!connections.has_key(account)) return;
debug("[%s] (Maybe) Establishing a new connection", account.bare_jid.to_string());
connection_errors.unset(account);
if (resource == null) resource = account.resourcepart;
XmppStream stream = new XmppStream();
foreach (XmppStreamModule module in module_manager.get_modules(account, resource)) {
stream.add_module(module);
XmppStreamResult stream_result;
if (connection_ongoing[account]) {
debug("[%s] Connection attempt already in progress. Directly retry if it fails.", account.bare_jid.to_string());
connection_directly_retry[account] = true;
return;
} else if (connections[account].stream != null) {
debug("[%s] Cancelling connecting because there is already a stream", account.bare_jid.to_string());
return;
} else {
connection_ongoing[account] = true;
connection_directly_retry[account] = false;
change_connection_state(account, ConnectionState.CONNECTING);
stream_result = yield Xmpp.establish_stream(account.bare_jid, module_manager.get_modules(account, resource), log_options);
connections[account].stream = stream_result.stream;
connection_ongoing[account] = false;
}
stream.log = new XmppLog(account.bare_jid.to_string(), log_options);
if (stream_result.stream == null) {
if (stream_result.tls_errors != null) {
set_connection_error(account, new ConnectionError(ConnectionError.Source.TLS, null) { reconnect_recomendation=ConnectionError.Reconnect.NEVER});
return;
}
debug("[%s] Could not connect", account.bare_jid.to_string());
change_connection_state(account, ConnectionState.DISCONNECTED);
check_reconnect(account, connection_directly_retry[account]);
return;
}
XmppStream stream = stream_result.stream;
debug("[%s] New connection with resource %s: %p", account.bare_jid.to_string(), resource, stream);
Connection connection = new Connection(stream, new DateTime.now_utc());
connections[account] = connection;
change_connection_state(account, ConnectionState.CONNECTING);
connections[account].established = new DateTime.now_utc();
stream.attached_modules.connect((stream) => {
change_connection_state(account, ConnectionState.CONNECTED);
});
stream.get_module(Sasl.Module.IDENTITY).received_auth_failure.connect((stream, node) => {
set_connection_error(account, new ConnectionError(ConnectionError.Source.SASL, null));
});
stream.get_module(Tls.Module.IDENTITY).invalid_certificate.connect(() => {
set_connection_error(account, new ConnectionError(ConnectionError.Source.TLS, null) { reconnect_recomendation=ConnectionError.Reconnect.NEVER});
});
stream.received_node.connect(() => {
connection.last_activity = new DateTime.now_utc();
});
connect_async.begin(account, stream);
stream_opened(account, stream);
}
private async void connect_async(Account account, XmppStream stream) {
try {
yield stream.connect(account.domainpart);
} catch (Error e) {
debug("[%s %p] Error: %s", account.bare_jid.to_string(), stream, e.message);
change_connection_state(account, ConnectionState.DISCONNECTED);
if (!connection_todo.contains(account)) {
return;
string connection_uuid = connections[account].uuid;
stream.received_node.connect(() => {
if (connections[account].uuid == connection_uuid) {
connections[account].last_activity = new DateTime.now_utc();
} else {
warning("Got node for outdated connection");
}
});
stream_opened(account, stream);
try {
yield stream.loop();
} catch (Error e) {
debug("[%s %p] Connection error: %s", account.bare_jid.to_string(), stream, e.message);
change_connection_state(account, ConnectionState.DISCONNECTED);
connections[account].reset();
StreamError.Flag? flag = stream.get_flag(StreamError.Flag.IDENTITY);
if (flag != null) {
warning(@"[%s %p] Stream Error: %s", account.bare_jid.to_string(), stream, flag.error_type);
set_connection_error(account, new ConnectionError(ConnectionError.Source.STREAM_ERROR, flag.error_type));
if (flag.resource_rejected) {
connect_(account, account.resourcepart + "-" + random_uuid());
connect_stream.begin(account, account.resourcepart + "-" + random_uuid());
return;
}
}
@ -202,27 +263,36 @@ public class ConnectionManager : Object {
return;
}
debug("[%s] Check reconnect in 5 sec", account.bare_jid.to_string());
Timeout.add_seconds(5, () => {
check_reconnect(account);
return false;
});
}
}
private void check_reconnects() {
foreach (Account account in connection_todo) {
foreach (Account account in connections.keys) {
check_reconnect(account);
}
}
private void check_reconnect(Account account) {
private void check_reconnect(Account account, bool directly_reconnect = false) {
if (!connections.has_key(account)) return;
bool acked = false;
DateTime? last_activity_was = connections[account].last_activity;
if (connections[account].stream == null) {
Timeout.add_seconds(10, () => {
if (!connections.has_key(account)) return false;
if (connections[account].stream != null) return false;
if (connections[account].last_activity != last_activity_was) return false;
connect_stream.begin(account);
return false;
});
return;
}
XmppStream stream = connections[account].stream;
stream.get_module(Xep.Ping.Module.IDENTITY).send_ping.begin(stream, account.bare_jid.domain_jid, () => {
acked = true;
if (connections[account].stream != stream) return;
@ -239,15 +309,8 @@ public class ConnectionManager : Object {
debug("[%s %p] Ping timeouted. Reconnecting", account.bare_jid.to_string(), stream);
change_connection_state(account, ConnectionState.DISCONNECTED);
connections[account].stream.disconnect.begin((_, res) => {
try {
connections[account].stream.disconnect.end(res);
} catch (Error e) {
debug("Error disconnecting stream: %s", e.message);
}
});
connect_(account);
connections[account].reset();
connect_stream.begin(account);
return false;
});
}
@ -268,19 +331,19 @@ public class ConnectionManager : Object {
check_reconnects();
} else {
debug("NetworkMonitor: Network reported offline");
foreach (Account account in connection_todo) {
foreach (Account account in connections.keys) {
change_connection_state(account, ConnectionState.DISCONNECTED);
}
}
}
private async void on_prepare_for_sleep(bool suspend) {
foreach (Account account in connection_todo) {
foreach (Account account in connections.keys) {
change_connection_state(account, ConnectionState.DISCONNECTED);
}
if (suspend) {
debug("Login1: Device suspended");
foreach (Account account in connection_todo) {
foreach (Account account in connections.keys) {
try {
make_offline(account);
yield connections[account].stream.disconnect();

2
libdino/src/service/module_manager.vala
View file

@ -46,8 +46,6 @@ public class ModuleManager {
lock(module_map) {
module_map[account] = new ArrayList<XmppStreamModule>();
module_map[account].add(new Iq.Module());
module_map[account].add(new Tls.Module());
module_map[account].add(new Xep.SrvRecordsTls.Module());
module_map[account].add(new Sasl.Module(account.bare_jid.to_string(), account.password));
module_map[account].add(new Xep.StreamManagement.Module());
module_map[account].add(new Bind.Module(account.resourcepart));

2
libdino/src/service/muc_manager.vala
View file

@ -97,6 +97,8 @@ public class MucManager : StreamInteractionModule, Object {
}
public void part(Account account, Jid jid) {
if (!mucs_todo.has_key(account) || !mucs_todo[account].contains(jid)) return;
mucs_todo[account].remove(jid);
XmppStream? stream = stream_interactor.get_stream(account);

105
libdino/src/service/registration.vala
View file

@ -23,33 +23,35 @@ public class Register : StreamInteractionModule, Object{
}
public async ConnectionManager.ConnectionError.Source? add_check_account(Account account) {
XmppStream stream = new XmppStream();
stream.log = new XmppLog(account.bare_jid.to_string(), Application.print_xmpp);
stream.add_module(new Tls.Module());
stream.add_module(new Iq.Module());
stream.add_module(new Xep.SrvRecordsTls.Module());
stream.add_module(new Sasl.Module(account.bare_jid.to_string(), account.password));
ConnectionManager.ConnectionError.Source? ret = null;
Gee.List<XmppStreamModule> list = new ArrayList<XmppStreamModule>();
list.add(new Iq.Module());
list.add(new Sasl.Module(account.bare_jid.to_string(), account.password));
XmppStreamResult stream_result = yield Xmpp.establish_stream(account.bare_jid.domain_jid, list, Application.print_xmpp);
if (stream_result.stream == null) {
if (stream_result.tls_errors != null) {
ret = ConnectionManager.ConnectionError.Source.TLS;
}
return ret;
}
XmppStream stream = stream_result.stream;
SourceFunc callback = add_check_account.callback;
stream.stream_negotiated.connect(() => {
if (callback == null) return;
Idle.add((owned)callback);
});
stream.get_module(Tls.Module.IDENTITY).invalid_certificate.connect((peer_cert, errors) => {
if (callback == null) return;
ret = ConnectionManager.ConnectionError.Source.TLS;
Idle.add((owned)callback);
});
stream.get_module(Sasl.Module.IDENTITY).received_auth_failure.connect((stream, node) => {
if (callback == null) return;
ret = ConnectionManager.ConnectionError.Source.SASL;
Idle.add((owned)callback);
});
stream.connect.begin(account.domainpart, (_, res) => {
stream.loop.begin((_, res) => {
try {
stream.connect.end(res);
stream.loop.end(res);
} catch (Error e) {
debug("Error connecting to stream: %s", e.message);
}
@ -62,7 +64,7 @@ public class Register : StreamInteractionModule, Object{
yield;
try {
yield stream.disconnect();
yield stream_result.stream.disconnect();
} catch (Error e) {}
return ret;
}
@ -73,13 +75,24 @@ public class Register : StreamInteractionModule, Object{
}
public static async ServerAvailabilityReturn check_server_availability(Jid jid) {
XmppStream stream = new XmppStream();
stream.log = new XmppLog(jid.to_string(), Application.print_xmpp);
stream.add_module(new Tls.Module());
stream.add_module(new Iq.Module());
stream.add_module(new Xep.SrvRecordsTls.Module());
ServerAvailabilityReturn ret = new ServerAvailabilityReturn() { available=false };
Gee.List<XmppStreamModule> list = new ArrayList<XmppStreamModule>();
list.add(new Iq.Module());
XmppStreamResult stream_result = yield Xmpp.establish_stream(jid.domain_jid, list, Application.print_xmpp);
if (stream_result.stream == null) {
if (stream_result.io_error != null) {
debug("Error connecting to stream: %s", stream_result.io_error.message);
}
if (stream_result.tls_errors != null) {
ret.error_flags = stream_result.tls_errors;
}
return ret;
}
XmppStream stream = stream_result.stream;
SourceFunc callback = check_server_availability.callback;
stream.stream_negotiated.connect(() => {
if (callback != null) {
@ -87,16 +100,10 @@ public class Register : StreamInteractionModule, Object{
Idle.add((owned)callback);
}
});
stream.get_module(Tls.Module.IDENTITY).invalid_certificate.connect((peer_cert, errors) => {
if (callback != null) {
ret.error_flags = errors;
Idle.add((owned)callback);
}
});
stream.connect.begin(jid.domainpart, (_, res) => {
stream.loop.begin((_, res) => {
try {
stream.connect.end(res);
stream.loop.end(res);
} catch (Error e) {
debug("Error connecting to stream: %s", e.message);
}
@ -114,12 +121,16 @@ public class Register : StreamInteractionModule, Object{
}
public static async Xep.InBandRegistration.Form? get_registration_form(Jid jid) {
XmppStream stream = new XmppStream();
stream.log = new XmppLog(jid.to_string(), Application.print_xmpp);
stream.add_module(new Tls.Module());
stream.add_module(new Iq.Module());
stream.add_module(new Xep.SrvRecordsTls.Module());
stream.add_module(new Xep.InBandRegistration.Module());
Gee.List<XmppStreamModule> list = new ArrayList<XmppStreamModule>();
list.add(new Iq.Module());
list.add(new Xep.InBandRegistration.Module());
XmppStreamResult stream_result = yield Xmpp.establish_stream(jid.domain_jid, list, Application.print_xmpp);
if (stream_result.stream == null) {
return null;
}
XmppStream stream = stream_result.stream;
SourceFunc callback = get_registration_form.callback;
@ -129,9 +140,9 @@ public class Register : StreamInteractionModule, Object{
}
});
stream.connect.begin(jid.domainpart, (_, res) => {
stream.loop.begin((_, res) => {
try {
stream.connect.end(res);
stream.loop.end(res);
} catch (Error e) {
debug("Error connecting to stream: %s", e.message);
}
@ -154,12 +165,16 @@ public class Register : StreamInteractionModule, Object{
}
public static async string? submit_form(Jid jid, Xep.InBandRegistration.Form form) {
XmppStream stream = new XmppStream();
stream.log = new XmppLog(jid.to_string(), Application.print_xmpp);
stream.add_module(new Tls.Module());
stream.add_module(new Iq.Module());
stream.add_module(new Xep.SrvRecordsTls.Module());
stream.add_module(new Xep.InBandRegistration.Module());
Gee.List<XmppStreamModule> list = new ArrayList<XmppStreamModule>();
list.add(new Iq.Module());
list.add(new Xep.InBandRegistration.Module());
XmppStreamResult stream_result = yield Xmpp.establish_stream(jid.domain_jid, list, Application.print_xmpp);
if (stream_result.stream == null) {
return null;
}
XmppStream stream = stream_result.stream;
SourceFunc callback = submit_form.callback;
@ -169,9 +184,9 @@ public class Register : StreamInteractionModule, Object{
}
});
stream.connect.begin(jid.domainpart, (_, res) => {
stream.loop.begin((_, res) => {
try {
stream.connect.end(res);
stream.loop.end(res);
} catch (Error e) {
debug("Error connecting to stream: %s", e.message);
}

11
xmpp-vala/CMakeLists.txt
View file

@ -20,13 +20,20 @@ set(ENGINE_EXTRA_OPTIONS ${MAIN_EXTRA_OPTIONS} --vapidir=${CMAKE_CURRENT_SOURCE_
vala_precompile(ENGINE_VALA_C
SOURCES
"src/core/direct_tls_xmpp_stream.vala"
"src/core/io_xmpp_stream.vala"
"src/core/module_flag.vala"
"src/core/starttls_xmpp_stream.vala"
"src/core/stream_connect.vala"
"src/core/tls_xmpp_stream.vala"
"src/core/xmpp_stream.vala"
"src/core/namespace_state.vala"
"src/core/stanza_attribute.vala"
"src/core/stanza_node.vala"
"src/core/stanza_reader.vala"
"src/core/stanza_writer.vala"
"src/core/xmpp_log.vala"
"src/core/xmpp_stream.vala"
"src/module/bind.vala"
"src/module/bookmarks_provider.vala"
@ -48,7 +55,6 @@ SOURCES
"src/module/stanza.vala"
"src/module/stanza_error.vala"
"src/module/stream_error.vala"
"src/module/tls.vala"
"src/module/util.vala"
"src/module/xep/0048_bookmarks.vala"
@ -91,7 +97,6 @@ SOURCES
"src/module/xep/0334_message_processing_hints.vala"
"src/module/xep/0359_unique_stable_stanza_ids.vala"
"src/module/xep/0363_http_file_upload.vala"
"src/module/xep/0368_srv_records_tls.vala"
"src/module/xep/0380_explicit_encryption.vala"
"src/module/xep/0391_jingle_encrypted_transports.vala"
"src/module/xep/0410_muc_self_ping.vala"

31
xmpp-vala/src/core/direct_tls_xmpp_stream.vala Normal file
View file

@ -0,0 +1,31 @@
public class Xmpp.DirectTlsXmppStream : TlsXmppStream {
string host;
uint16 port;
public DirectTlsXmppStream(Jid remote, string host, uint16 port) {
this.remote_name = remote;
this.host = host;
this.port = port;
}
public override async void connect() throws IOStreamError {
SocketClient client = new SocketClient();
try {
debug("Connecting to %s %i (tls)", host, port);
IOStream? io_stream = yield client.connect_to_host_async(host, port);
TlsConnection tls_connection = TlsClientConnection.new(io_stream, new NetworkAddress(remote_name.to_string(), port));
#if ALPN_SUPPORT
tls_connection.set_advertised_protocols(new string[]{"xmpp-client"});
#endif
tls_connection.accept_certificate.connect(on_invalid_certificate);
reset_stream(tls_connection);
yield setup();
attach_negotation_modules();
} catch (Error e) {
throw new IOStreamError.CONNECT("Failed connecting to %s:%i (tls): %s", host, port, e.message);
}
}
}

101
xmpp-vala/src/core/io_xmpp_stream.vala Normal file
View file

@ -0,0 +1,101 @@
using Gee;
public interface Xmpp.WriteNodeFunc : Object {
public abstract async void write_stanza(XmppStream stream, StanzaNode node) throws IOStreamError;
}
public abstract class Xmpp.IoXmppStream : XmppStream {
private IOStream? stream;
internal StanzaReader? reader;
internal StanzaWriter? writer;
internal WriteNodeFunc? write_obj = null;
public override async void disconnect() throws IOStreamError, XmlError, IOError {
disconnected = true;
if (writer == null || reader == null || stream == null) {
throw new IOStreamError.DISCONNECT("trying to disconnect, but no stream open");
}
log.str("OUT", "</stream:stream>", this);
yield writer.write("</stream:stream>");
reader.cancel();
yield stream.close_async();
}
public void reset_stream(IOStream stream) {
this.stream = stream;
reader = new StanzaReader.for_stream(stream.input_stream);
writer = new StanzaWriter.for_stream(stream.output_stream);
writer.cancel.connect(reader.cancel);
require_setup();
}
public override async StanzaNode read() throws IOStreamError {
StanzaReader? reader = this.reader;
if (reader == null) throw new IOStreamError.READ("trying to read, but no stream open");
try {
StanzaNode node = yield ((!)reader).read_node();
log.node("IN", node, this);
return node;
} catch (XmlError e) {
throw new IOStreamError.READ(e.message);
}
}
[Version (deprecated = true, deprecated_since = "0.1", replacement = "write_async")]
public override void write(StanzaNode node) {
write_async.begin(node, (obj, res) => {
try {
write_async.end(res);
} catch (Error e) { }
});
}
public override async void write_async(StanzaNode node) throws IOStreamError {
if (write_obj != null) {
yield write_obj.write_stanza(this, node);
} else {
StanzaWriter? writer = this.writer;
if (writer == null) throw new IOStreamError.WRITE("trying to write, but no stream open");
try {
log.node("OUT", node, this);
yield ((!)writer).write_node(node);
} catch (XmlError e) {
throw new IOStreamError.WRITE(e.message);
}
}
}
internal IOStream? get_stream() {
return stream;
}
public override async void setup() throws IOStreamError {
StanzaNode outs = new StanzaNode.build("stream", "http://etherx.jabber.org/streams")
.put_attribute("to", remote_name.to_string())
.put_attribute("version", "1.0")
.put_attribute("xmlns", "jabber:client")
.put_attribute("stream", "http://etherx.jabber.org/streams", XMLNS_URI);
outs.has_nodes = true;
log.node("OUT ROOT", outs, this);
write(outs);
received_root_node(this, yield read_root());
setup_needed = false;
}
private async StanzaNode read_root() throws IOStreamError {
StanzaReader? reader = this.reader;
if (reader == null) throw new IOStreamError.READ("trying to read, but no stream open");
try {
StanzaNode node = yield ((!)reader).read_root_node();
log.node("IN ROOT", node, this);
return node;
} catch (XmlError.TLS e) {
throw new IOStreamError.TLS(e.message);
} catch (Error e) {
throw new IOStreamError.READ(e.message);
}
}
}

61
xmpp-vala/src/core/module_flag.vala Normal file
View file

@ -0,0 +1,61 @@
namespace Xmpp {
public class FlagIdentity<T> : Object {
public string ns { get; private set; }
public string id { get; private set; }
public FlagIdentity(string ns, string id) {
this.ns = ns;
this.id = id;
}
public T? cast(XmppStreamFlag flag) {
return flag.get_type().is_a(typeof(T)) ? (T?) flag : null;
}
public bool matches(XmppStreamFlag module) {
return module.get_ns() == ns && module.get_id() == id;
}
}
public abstract class XmppStreamFlag : Object {
public abstract string get_ns();
public abstract string get_id();
}
public class ModuleIdentity<T> : Object {
public string ns { get; private set; }
public string id { get; private set; }
public ModuleIdentity(string ns, string id) {
this.ns = ns;
this.id = id;
}
public T? cast(XmppStreamModule module) {
return module.get_type().is_a(typeof(T)) ? (T?) module : null;
}
public bool matches(XmppStreamModule module) {
return module.get_ns() == ns && module.get_id() == id;
}
}
public abstract class XmppStreamModule : Object {
public abstract void attach(XmppStream stream);
public abstract void detach(XmppStream stream);
public abstract string get_ns();
public abstract string get_id();
}
public abstract class XmppStreamNegotiationModule : XmppStreamModule {
public abstract bool mandatory_outstanding(XmppStream stream);
public abstract bool negotiation_active(XmppStream stream);
}
}

54
xmpp-vala/src/core/starttls_xmpp_stream.vala Normal file
View file

@ -0,0 +1,54 @@
public class Xmpp.StartTlsXmppStream : TlsXmppStream {
private const string TLS_NS_URI = "urn:ietf:params:xml:ns:xmpp-tls";
string host;
uint16 port;
public StartTlsXmppStream(Jid remote, string host, uint16 port) {
this.remote_name = remote;
this.host = host;
this.port = port;
}
public override async void connect() throws IOStreamError {
try {
SocketClient client = new SocketClient();
debug("Connecting to %s %i (starttls)", host, port);
IOStream stream = yield client.connect_to_host_async(host, port);
reset_stream(stream);
yield setup();
StanzaNode node = yield read();
var starttls_node = node.get_subnode("starttls", TLS_NS_URI);
if (starttls_node == null) {
warning("%s does not offer starttls", remote_name.to_string());
}
write(new StanzaNode.build("starttls", TLS_NS_URI).add_self_xmlns());
node = yield read();
if (node.ns_uri != TLS_NS_URI || node.name != "proceed") {
warning("Server did not 'proceed' starttls request");
}
try {
var identity = new NetworkService("xmpp-client", "tcp", remote_name.to_string());
var conn = TlsClientConnection.new(get_stream(), identity);
reset_stream(conn);
conn.accept_certificate.connect(on_invalid_certificate);
} catch (Error e) {
stderr.printf("Failed to start TLS: %s\n", e.message);
}
yield setup();
attach_negotation_modules();
} catch (Error e) {
throw new IOStreamError.CONNECT("Failed connecting to %s:%i (starttls): %s", host, port, e.message);
}
}
}

89
xmpp-vala/src/core/stream_connect.vala Normal file
View file

@ -0,0 +1,89 @@
namespace Xmpp {
private class SrvTargetInfo {
public string host { get; set; }
public uint16 port { get; set; }
public string service { get; set; }
public uint16 priority { get; set; }
}
public class XmppStreamResult {
public XmppStream? stream { get; set; }
public TlsCertificateFlags? tls_errors { get; set; }
public IOStreamError? io_error { get; set; }
}
public async XmppStreamResult establish_stream(Jid bare_jid, Gee.List<XmppStreamModule> modules, string? log_options) {
Jid remote = bare_jid.domain_jid;
//Lookup xmpp-client and xmpps-client SRV records
GLib.List<SrvTargetInfo>? targets = new GLib.List<SrvTargetInfo>();
GLibFixes.Resolver resolver = GLibFixes.Resolver.get_default();
try {
GLib.List<SrvTarget> xmpp_services = yield resolver.lookup_service_async("xmpp-client", "tcp", remote.to_string(), null);
foreach (SrvTarget service in xmpp_services) {
targets.append(new SrvTargetInfo() { host=service.get_hostname(), port=service.get_port(), service="xmpp-client", priority=service.get_priority()});
}
} catch (Error e) {
debug("Got no xmpp-client DNS records for %s: %s", remote.to_string(), e.message);
}
try {
GLib.List<SrvTarget> xmpp_services = yield resolver.lookup_service_async("xmpps-client", "tcp", remote.to_string(), null);
foreach (SrvTarget service in xmpp_services) {
targets.append(new SrvTargetInfo() { host=service.get_hostname(), port=service.get_port(), service="xmpps-client", priority=service.get_priority()});
}
} catch (Error e) {
debug("Got no xmpps-client DNS records for %s: %s", remote.to_string(), e.message);
}
targets.sort((a, b) => {
return a.priority - b.priority;
});
// Add fallback connection
bool should_add_fallback = true;
foreach (SrvTargetInfo target in targets) {
if (target.service == "xmpp-client" && target.port == 5222 && target.host == remote.to_string()) {
should_add_fallback = false;
}
}
if (should_add_fallback) {
targets.append(new SrvTargetInfo() { host=remote.to_string(), port=5222, service="xmpp-client", priority=uint16.MAX});
}
// Try all connection options from lowest to highest priority
TlsXmppStream? stream = null;
TlsCertificateFlags? tls_errors = null;
IOStreamError? io_error = null;
foreach (SrvTargetInfo target in targets) {
try {
if (target.service == "xmpp-client") {
stream = new StartTlsXmppStream(remote, target.host, target.port);
} else {
stream = new DirectTlsXmppStream(remote, target.host, target.port);
}
stream.log = new XmppLog(bare_jid.to_string(), log_options);
foreach (XmppStreamModule module in modules) {
stream.add_module(module);
}
yield stream.connect();
return new XmppStreamResult() { stream=stream };
} catch (IOStreamError e) {
warning("Could not establish XMPP session with %s:%i: %s", target.host, target.port, e.message);
if (stream != null) {
if (stream.errors != null) {
tls_errors = stream.errors;
}
io_error = e;
stream.detach_modules();
}
}
}
return new XmppStreamResult() { io_error=io_error, tls_errors=tls_errors };
}
}

19
xmpp-vala/src/core/tls_xmpp_stream.vala Normal file
View file

@ -0,0 +1,19 @@
public abstract class Xmpp.TlsXmppStream : IoXmppStream {
public TlsCertificateFlags? errors;
protected bool on_invalid_certificate(TlsCertificate peer_cert, TlsCertificateFlags errors) {
this.errors = errors;
string error_str = "";
foreach (var f in new TlsCertificateFlags[]{TlsCertificateFlags.UNKNOWN_CA, TlsCertificateFlags.BAD_IDENTITY,
TlsCertificateFlags.NOT_ACTIVATED, TlsCertificateFlags.EXPIRED, TlsCertificateFlags.REVOKED,
TlsCertificateFlags.INSECURE, TlsCertificateFlags.GENERIC_ERROR, TlsCertificateFlags.VALIDATE_ALL}) {
if (f in errors) {
error_str += @"$(f), ";
}
}
warning(@"Tls Certificate Errors: $(error_str)");
return false;
}
}

316
xmpp-vala/src/core/xmpp_stream.vala
View file

@ -1,8 +1,6 @@
using Gee;
namespace Xmpp {
public errordomain IOStreamError {
public errordomain Xmpp.IOStreamError {
READ,
WRITE,
CONNECT,
@ -10,26 +8,7 @@ public errordomain IOStreamError {
TLS
}
public class XmppStream {
public const string NS_URI = "http://etherx.jabber.org/streams";
public Jid remote_name;
public XmppLog log = new XmppLog();
public StanzaNode? features { get; private set; default = new StanzaNode.build("features", NS_URI); }
private IOStream? stream;
internal StanzaReader? reader;
internal StanzaWriter? writer;
public Gee.List<XmppStreamFlag> flags { get; private set; default=new ArrayList<XmppStreamFlag>(); }
public Gee.List<XmppStreamModule> modules { get; private set; default=new ArrayList<XmppStreamModule>(); }
private Gee.List<ConnectionProvider> connection_providers = new ArrayList<ConnectionProvider>();
internal WriteNodeFunc? write_obj = null;
public bool negotiation_complete { get; set; default=false; }
private bool setup_needed = false;
private bool non_negotiation_modules_attached = false;
private bool disconnected = false;
public abstract class Xmpp.XmppStream {
public signal void received_node(XmppStream stream, StanzaNode node);
public signal void received_root_node(XmppStream stream, StanzaNode node);
@ -41,66 +20,32 @@ public class XmppStream {
public signal void stream_negotiated(XmppStream stream);
public signal void attached_modules(XmppStream stream);
public XmppStream() {
register_connection_provider(new StartTlsConnectionProvider());
}
public const string NS_URI = "http://etherx.jabber.org/streams";
public async void connect(string? remote_name = null) throws IOStreamError {
try {
if (remote_name != null) this.remote_name = new Jid(remote_name);
} catch (InvalidJidError e) {
throw new IOStreamError.CONNECT(@"Invalid remote name \"$remote_name\": $(e.message)");
}
attach_negotation_modules();
try {
int min_priority = -1;
ConnectionProvider? best_provider = null;
foreach (ConnectionProvider connection_provider in connection_providers) {
int? priority = yield connection_provider.get_priority(this.remote_name);
if (priority != null && (priority < min_priority || min_priority == -1)) {
min_priority = priority;
best_provider = connection_provider;
}
}
IOStream? stream = null;
if (best_provider != null) {
stream = yield best_provider.connect(this);
}
if (stream == null) {
debug("Connecting to %s, xmpp-client, tcp (fallback)", this.remote_name.to_string());
stream = yield (new SocketClient()).connect_to_host_async(this.remote_name.to_string(), 5222);
}
if (stream == null) {
throw new IOStreamError.CONNECT("client.connect() returned null");
}
reset_stream((!)stream);
} catch (Error e) {
debug("[%p] Could not connect to server: %s", this, e.message);
throw new IOStreamError.CONNECT(e.message);
}
debug("Connected to %s", remote_name);
yield loop();
}
public Gee.List<XmppStreamFlag> flags { get; private set; default=new ArrayList<XmppStreamFlag>(); }
public Gee.List<XmppStreamModule> modules { get; private set; default=new ArrayList<XmppStreamModule>(); }
public async void disconnect() throws IOStreamError, XmlError, IOError {
disconnected = true;
if (writer == null || reader == null || stream == null) {
throw new IOStreamError.DISCONNECT("trying to disconnect, but no stream open");
}
log.str("OUT", "</stream:stream>", this);
yield writer.write("</stream:stream>");
reader.cancel();
yield stream.close_async();
}
public StanzaNode? features { get; private set; default = new StanzaNode.build("features", NS_URI); }
public Jid remote_name;
public void reset_stream(IOStream stream) {
this.stream = stream;
reader = new StanzaReader.for_stream(stream.input_stream);
writer = new StanzaWriter.for_stream(stream.output_stream);
public XmppLog log = new XmppLog();
public bool negotiation_complete { get; set; default=false; }
protected bool non_negotiation_modules_attached = false;
protected bool setup_needed = false;
protected bool disconnected = false;
writer.cancel.connect(reader.cancel);
require_setup();
}
public abstract async void connect() throws IOStreamError;
public abstract async void disconnect() throws IOStreamError, XmlError, IOError;
public abstract async StanzaNode read() throws IOStreamError;
[Version (deprecated = true, deprecated_since = "0.1", replacement = "write_async")]
public abstract void write(StanzaNode node);
public abstract async void write_async(StanzaNode node) throws IOStreamError;
public abstract async void setup() throws IOStreamError;
public void require_setup() {
setup_needed = true;
@ -110,46 +55,6 @@ public class XmppStream {
return setup_needed;
}
public async StanzaNode read() throws IOStreamError {
StanzaReader? reader = this.reader;
if (reader == null) throw new IOStreamError.READ("trying to read, but no stream open");
try {
StanzaNode node = yield ((!)reader).read_node();
log.node("IN", node, this);
return node;
} catch (XmlError e) {
throw new IOStreamError.READ(e.message);
}
}
[Version (deprecated = true, deprecated_since = "0.1", replacement = "write_async")]
public void write(StanzaNode node) {
write_async.begin(node, (obj, res) => {
try {
write_async.end(res);
} catch (Error e) { }
});
}
public async void write_async(StanzaNode node) throws IOStreamError {
if (write_obj != null) {
yield write_obj.write_stanza(this, node);
} else {
StanzaWriter? writer = this.writer;
if (writer == null) throw new IOStreamError.WRITE("trying to write, but no stream open");
try {
log.node("OUT", node, this);
yield ((!)writer).write_node(node);
} catch (XmlError e) {
throw new IOStreamError.WRITE(e.message);
}
}
}
internal IOStream? get_stream() {
return stream;
}
public void add_flag(XmppStreamFlag flag) {
flags.add(flag);
}
@ -184,7 +89,6 @@ public class XmppStream {
public void detach_modules() {
foreach (XmppStreamModule module in modules) {
if (!(module is XmppStreamNegotiationModule) && !negotiation_complete) continue;
module.detach(this);
}
}
@ -197,37 +101,10 @@ public class XmppStream {
return null;
}
public void register_connection_provider(ConnectionProvider connection_provider) {
connection_providers.add(connection_provider);
}
public bool is_negotiation_active() {
foreach (XmppStreamModule module in modules) {
if (module is XmppStreamNegotiationModule) {
XmppStreamNegotiationModule negotiation_module = (XmppStreamNegotiationModule) module;
if (negotiation_module.negotiation_active(this)) return true;
}
}
return false;
}
private async void setup() throws IOStreamError {
StanzaNode outs = new StanzaNode.build("stream", "http://etherx.jabber.org/streams")
.put_attribute("to", remote_name.to_string())
.put_attribute("version", "1.0")
.put_attribute("xmlns", "jabber:client")
.put_attribute("stream", "http://etherx.jabber.org/streams", XMLNS_URI);
outs.has_nodes = true;
log.node("OUT ROOT", outs, this);
write(outs);
received_root_node(this, yield read_root());
}
private async void loop() throws IOStreamError {
public async void loop() throws IOStreamError {
while (true) {
if (setup_needed) {
yield setup();
setup_needed = false;
}
StanzaNode node = yield read();
@ -237,6 +114,20 @@ public class XmppStream {
if (disconnected) break;
yield handle_stanza(node);
if (!non_negotiation_modules_attached && negotiation_modules_done()) {
attach_non_negotation_modules();
non_negotiation_modules_attached = true;
if (!negotiation_complete) {
stream_negotiated(this);
negotiation_complete = true;
}
}
}
}
private async void handle_stanza(StanzaNode node) {
received_node(this, node);
if (node.ns_uri == NS_URI && node.name == "features") {
@ -261,16 +152,16 @@ public class XmppStream {
} else {
received_nonza(this, node);
}
}
if (!non_negotiation_modules_attached && negotiation_modules_done()) {
attach_non_negotation_modules();
non_negotiation_modules_attached = true;
if (!negotiation_complete) {
stream_negotiated(this);
negotiation_complete = true;
}
public bool is_negotiation_active() {
foreach (XmppStreamModule module in modules) {
if (module is XmppStreamNegotiationModule) {
XmppStreamNegotiationModule negotiation_module = (XmppStreamNegotiationModule) module;
if (negotiation_module.negotiation_active(this)) return true;
}
}
return false;
}
private bool negotiation_modules_done() throws IOStreamError {
@ -297,124 +188,11 @@ public class XmppStream {
attached_modules(this);
}
private void attach_negotation_modules() {
public void attach_negotation_modules() {
foreach (XmppStreamModule module in modules) {
if (module as XmppStreamNegotiationModule != null) {
module.attach(this);
}
}
}
private async StanzaNode read_root() throws IOStreamError {
StanzaReader? reader = this.reader;
if (reader == null) throw new IOStreamError.READ("trying to read, but no stream open");
try {
StanzaNode node = yield ((!)reader).read_root_node();
log.node("IN ROOT", node, this);
return node;
} catch (XmlError.TLS e) {
throw new IOStreamError.TLS(e.message);
} catch (Error e) {
throw new IOStreamError.READ(e.message);
}
}
}
public class FlagIdentity<T> : Object {
public string ns { get; private set; }
public string id { get; private set; }
public FlagIdentity(string ns, string id) {
this.ns = ns;
this.id = id;
}
public T? cast(XmppStreamFlag flag) {
return flag.get_type().is_a(typeof(T)) ? (T?) flag : null;
}
public bool matches(XmppStreamFlag module) {
return module.get_ns() == ns && module.get_id() == id;
}
}
public abstract class XmppStreamFlag : Object {
public abstract string get_ns();
public abstract string get_id();
}
public class ModuleIdentity<T> : Object {
public string ns { get; private set; }
public string id { get; private set; }
public ModuleIdentity(string ns, string id) {
this.ns = ns;
this.id = id;
}
public T? cast(XmppStreamModule module) {
return module.get_type().is_a(typeof(T)) ? (T?) module : null;
}
public bool matches(XmppStreamModule module) {
return module.get_ns() == ns && module.get_id() == id;
}
}
public abstract class XmppStreamModule : Object {
public abstract void attach(XmppStream stream);
public abstract void detach(XmppStream stream);
public abstract string get_ns();
public abstract string get_id();
}
public abstract class XmppStreamNegotiationModule : XmppStreamModule {
public abstract bool mandatory_outstanding(XmppStream stream);
public abstract bool negotiation_active(XmppStream stream);
}
public abstract class ConnectionProvider {
public async abstract int? get_priority(Jid remote_name);
public async abstract IOStream? connect(XmppStream stream);
public abstract string get_id();
}
public class StartTlsConnectionProvider : ConnectionProvider {
private SrvTarget? srv_target;
public async override int? get_priority(Jid remote_name) {
GLib.List<SrvTarget>? xmpp_target = null;
try {
GLibFixes.Resolver resolver = GLibFixes.Resolver.get_default();
xmpp_target = yield resolver.lookup_service_async("xmpp-client", "tcp", remote_name.to_string(), null);
} catch (Error e) {
return null;
}
xmpp_target.sort((a, b) => { return a.get_priority() - b.get_priority(); });
srv_target = xmpp_target.nth(0).data;
return xmpp_target.nth(0).data.get_priority();
}
public async override IOStream? connect(XmppStream stream) {
try {
SocketClient client = new SocketClient();
debug("Connecting to %s %i (starttls)", srv_target.get_hostname(), srv_target.get_port());
return yield client.connect_to_host_async(srv_target.get_hostname(), srv_target.get_port());
} catch (Error e) {
return null;
}
}
public override string get_id() { return "start_tls"; }
}
public interface WriteNodeFunc : Object {
public abstract async void write_stanza(XmppStream stream, StanzaNode node) throws IOStreamError;
}
}

1
xmpp-vala/src/module/sasl.vala
View file

@ -154,7 +154,6 @@ namespace Xmpp.Sasl {
public void received_features_node(XmppStream stream) {
if (stream.has_flag(Flag.IDENTITY)) return;
if (stream.is_setup_needed()) return;
if (!stream.has_flag(Tls.Flag.IDENTITY) || !stream.get_flag(Tls.Flag.IDENTITY).finished) return;
var mechanisms = stream.features.get_subnode("mechanisms", NS_URI);
string[] supported_mechanisms = {};

5
xmpp-vala/src/module/tls.vala
View file

@ -23,10 +23,11 @@ namespace Xmpp.Tls {
private void received_nonza(XmppStream stream, StanzaNode node) {
if (node.ns_uri == NS_URI && node.name == "proceed") {
try {
var io_stream = stream.get_stream();
StartTlsXmppStream? tls_xmpp_stream = stream as StartTlsXmppStream;
var io_stream = tls_xmpp_stream.get_stream();
if (io_stream == null) return;
var conn = TlsClientConnection.new(io_stream, identity);
stream.reset_stream(conn);
tls_xmpp_stream.reset_stream(conn);
conn.accept_certificate.connect(on_invalid_certificate);
var flag = stream.get_flag(Flag.IDENTITY);

18
xmpp-vala/src/module/xep/0030_service_discovery/module.vala
View file

@ -23,7 +23,10 @@ public class Module : XmppStreamModule, Iq.Handler {
}
public void remove_feature(XmppStream stream, string feature) {
stream.get_flag(Flag.IDENTITY).remove_own_feature(feature);
Flag? flag = stream.get_flag(Flag.IDENTITY);
if (flag != null) {
flag.remove_own_feature(feature);
}
}
public void add_feature_notify(XmppStream stream, string feature) {
@ -34,14 +37,6 @@ public class Module : XmppStreamModule, Iq.Handler {
remove_feature(stream, feature + "+notify");
}
public void add_identity(XmppStream stream, Identity identity) {
stream.get_flag(Flag.IDENTITY).add_own_identity(identity);
}
public void remove_identity(XmppStream stream, Identity identity) {
stream.get_flag(Flag.IDENTITY).remove_own_identity(identity);
}
public async bool has_entity_feature(XmppStream stream, Jid jid, string feature) {
return yield this.cache.has_entity_feature(jid, feature);
}
@ -93,7 +88,7 @@ public class Module : XmppStreamModule, Iq.Handler {
public override void attach(XmppStream stream) {
stream.add_flag(new Flag());
add_identity(stream, own_identity);
stream.get_flag(Flag.IDENTITY).add_own_identity(own_identity);
stream.get_module(Iq.Module.IDENTITY).register_for_namespace(NS_URI_INFO, this);
add_feature(stream, NS_URI_INFO);
@ -102,7 +97,8 @@ public class Module : XmppStreamModule, Iq.Handler {
public override void detach(XmppStream stream) {
active_info_requests.clear();
remove_identity(stream, own_identity);
Flag? flag = stream.get_flag(Flag.IDENTITY);
if (flag != null) flag.remove_own_identity(own_identity);
stream.get_module(Iq.Module.IDENTITY).unregister_from_namespace(NS_URI_INFO, this);
remove_feature(stream, NS_URI_INFO);

9
xmpp-vala/src/module/xep/0198_stream_management.vala
View file

@ -39,7 +39,7 @@ public class Module : XmppStreamNegotiationModule, WriteNodeFunc {
}
internal async void write_node(XmppStream stream, StanzaNode node) {
StanzaWriter? writer = stream.writer;
StanzaWriter? writer = ((IoXmppStream)stream).writer;
if (writer == null) return;
try {
stream.log.node("OUT", node, stream);
@ -104,8 +104,6 @@ public class Module : XmppStreamNegotiationModule, WriteNodeFunc {
private void check_resume(XmppStream stream) {
if (stream_has_sm_feature(stream) && session_id != null) {
Tls.Flag? tls_flag = stream.get_flag(Tls.Flag.IDENTITY);
if (tls_flag != null && tls_flag.finished) {
StanzaNode node = new StanzaNode.build("resume", NS_URI).add_self_xmlns()
.put_attribute("h", h_inbound.to_string())
.put_attribute("previd", session_id);
@ -113,7 +111,6 @@ public class Module : XmppStreamNegotiationModule, WriteNodeFunc {
stream.add_flag(new Flag());
}
}
}
private void check_enable(XmppStream stream) {
if (stream_has_sm_feature(stream) && session_id == null) {
@ -137,7 +134,7 @@ public class Module : XmppStreamNegotiationModule, WriteNodeFunc {
h_inbound = 0;
session_id = node.get_attribute("id", NS_URI);
flags = stream.flags;
stream.write_obj = this;
((IoXmppStream)stream).write_obj = this;
} else if (node.name == "resumed") {
stream.get_flag(Flag.IDENTITY).resumed = true;
@ -152,7 +149,7 @@ public class Module : XmppStreamNegotiationModule, WriteNodeFunc {
}
in_flight_stanzas.clear();
check_queue(stream);
stream.write_obj = this;
((IoXmppStream)stream).write_obj = this;
} else if (node.name == "failed") {
stream.received_features_node(stream);
session_id = null;

56
xmpp-vala/src/module/xep/0368_srv_records_tls.vala
View file

@ -1,56 +0,0 @@
using Gee;
namespace Xmpp.Xep.SrvRecordsTls {
public class Module : XmppStreamNegotiationModule {
public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>("", "0363_srv_records_for_xmpp_over_tls");
public override void attach(XmppStream stream) {
stream.register_connection_provider(new TlsConnectionProvider());
}
public override void detach(XmppStream stream) { }
public override bool mandatory_outstanding(XmppStream stream) { return false; }
public override bool negotiation_active(XmppStream stream) { return false; }
public override string get_ns() { return IDENTITY.ns; }
public override string get_id() { return IDENTITY.id; }
}
public class TlsConnectionProvider : ConnectionProvider {
private SrvTarget? srv_target;
public async override int? get_priority(Jid remote_name) {
GLib.List<SrvTarget>? xmpp_target = null;
try {
GLibFixes.Resolver resolver = GLibFixes.Resolver.get_default();
xmpp_target = yield resolver.lookup_service_async("xmpps-client", "tcp", remote_name.to_string(), null);
} catch (Error e) {
return null;
}
xmpp_target.sort((a, b) => { return a.get_priority() - b.get_priority(); });
srv_target = xmpp_target.nth(0).data;
return xmpp_target.nth(0).data.get_priority();
}
public async override IOStream? connect(XmppStream stream) {
SocketClient client = new SocketClient();
try {
debug("Connecting to %s %i (tls)", srv_target.get_hostname(), srv_target.get_port());
IOStream? io_stream = yield client.connect_to_host_async(srv_target.get_hostname(), srv_target.get_port());
TlsConnection tls_connection = TlsClientConnection.new(io_stream, new NetworkAddress(stream.remote_name.to_string(), srv_target.get_port()));
#if ALPN_SUPPORT
tls_connection.set_advertised_protocols(new string[]{"xmpp-client"});
#endif
tls_connection.accept_certificate.connect(stream.get_module(Tls.Module.IDENTITY).on_invalid_certificate);
stream.add_flag(new Tls.Flag() { finished=true });
return tls_connection;
} catch (Error e) {
return null;
}
}
public override string get_id() { return "srv_records"; }
}
}