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-rw-r--r--xmpp-vala/src/module/xep/0065_socks5_bytestreams.vala83
-rw-r--r--xmpp-vala/src/module/xep/0166_jingle.vala246
-rw-r--r--xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala2
-rw-r--r--xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala505
-rw-r--r--xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala35
5 files changed, 786 insertions, 85 deletions
diff --git a/xmpp-vala/src/module/xep/0065_socks5_bytestreams.vala b/xmpp-vala/src/module/xep/0065_socks5_bytestreams.vala
new file mode 100644
index 00000000..1890aac3
--- /dev/null
+++ b/xmpp-vala/src/module/xep/0065_socks5_bytestreams.vala
@@ -0,0 +1,83 @@
+using Gee;
+using Xmpp;
+using Xmpp.Xep;
+
+namespace Xmpp.Xep.Socks5Bytestreams {
+
+internal const string NS_URI = "http://jabber.org/protocol/bytestreams";
+
+public class Proxy : Object {
+ public string host { get; private set; }
+ public Jid jid { get; private set; }
+ public int port { get; private set; }
+
+ public Proxy(string host, Jid jid, int port) {
+ this.host = host;
+ this.jid = jid;
+ this.port = port;
+ }
+}
+
+public class Module : XmppStreamModule, Iq.Handler {
+ public static Xmpp.ModuleIdentity<Module> IDENTITY = new Xmpp.ModuleIdentity<Module>(NS_URI, "0065_socks5_bytestreams");
+
+ public override void attach(XmppStream stream) {
+ stream.add_flag(new Flag());
+ query_availability(stream);
+ }
+ public override void detach(XmppStream stream) { }
+
+ public void on_iq_set(XmppStream stream, Iq.Stanza iq) { }
+
+ public Gee.List<Proxy> get_proxies(XmppStream stream) {
+ return stream.get_flag(Flag.IDENTITY).proxies;
+ }
+
+ private void query_availability(XmppStream stream) {
+ stream.get_module(ServiceDiscovery.Module.IDENTITY).request_items(stream, stream.remote_name, (stream, items_result) => {
+ foreach (Xep.ServiceDiscovery.Item item in items_result.items) {
+ stream.get_module(ServiceDiscovery.Module.IDENTITY).request_info(stream, item.jid, (stream, info_result) => {
+ foreach (string feature in info_result.features) {
+ if (feature == NS_URI) {
+ StanzaNode query_ = new StanzaNode.build("query", NS_URI).add_self_xmlns();
+ Iq.Stanza iq = new Iq.Stanza.get(query_) { to=item.jid };
+ stream.get_module(Iq.Module.IDENTITY).send_iq(stream, iq, (stream, iq) => {
+ if (iq.is_error()) {
+ return;
+ }
+ StanzaNode? query = iq.stanza.get_subnode("query", NS_URI);
+ StanzaNode? stream_host = query != null ? query.get_subnode("streamhost", NS_URI) : null;
+ if (query == null || stream_host == null) {
+ return;
+ }
+ string? host = stream_host.get_attribute("host");
+ string? jid_str = stream_host.get_attribute("jid");
+ Jid? jid = jid_str != null ? Jid.parse(jid_str) : null;
+ int port = stream_host.get_attribute_int("port");
+ if (host == null || jid == null || port <= 0 || port > 65535) {
+ return;
+ }
+ stream.get_flag(Flag.IDENTITY).proxies.add(new Proxy(host, jid, port));
+ });
+ }
+ }
+ });
+ }
+ });
+ }
+
+ public override string get_ns() { return NS_URI; }
+ public override string get_id() { return IDENTITY.id; }
+}
+
+public class Flag : XmppStreamFlag {
+ public static FlagIdentity<Flag> IDENTITY = new FlagIdentity<Flag>(NS_URI, "socks5_bytestreams");
+
+ public Gee.List<Proxy> proxies = new ArrayList<Proxy>();
+
+ public override string get_ns() { return NS_URI; }
+ public override string get_id() { return IDENTITY.id; }
+}
+
+
+}
diff --git a/xmpp-vala/src/module/xep/0166_jingle.vala b/xmpp-vala/src/module/xep/0166_jingle.vala
index ac1dd10b..a251293d 100644
--- a/xmpp-vala/src/module/xep/0166_jingle.vala
+++ b/xmpp-vala/src/module/xep/0166_jingle.vala
@@ -11,7 +11,9 @@ public errordomain IqError {
BAD_REQUEST,
NOT_ACCEPTABLE,
NOT_IMPLEMENTED,
+ UNSUPPORTED_INFO,
OUT_OF_ORDER,
+ RESOURCE_CONSTRAINT,
}
void send_iq_error(IqError iq_error, XmppStream stream, Iq.Stanza iq) {
@@ -22,9 +24,14 @@ void send_iq_error(IqError iq_error, XmppStream stream, Iq.Stanza iq) {
error = new ErrorStanza.not_acceptable(iq_error.message);
} else if (iq_error is IqError.NOT_IMPLEMENTED) {
error = new ErrorStanza.feature_not_implemented(iq_error.message);
+ } else if (iq_error is IqError.UNSUPPORTED_INFO) {
+ StanzaNode unsupported_info = new StanzaNode.build("unsupported-info", ERROR_NS_URI).add_self_xmlns();
+ error = new ErrorStanza.build(ErrorStanza.TYPE_CANCEL, ErrorStanza.CONDITION_FEATURE_NOT_IMPLEMENTED, iq_error.message, unsupported_info);
} else if (iq_error is IqError.OUT_OF_ORDER) {
StanzaNode out_of_order = new StanzaNode.build("out-of-order", ERROR_NS_URI).add_self_xmlns();
error = new ErrorStanza.build(ErrorStanza.TYPE_MODIFY, ErrorStanza.CONDITION_UNEXPECTED_REQUEST, iq_error.message, out_of_order);
+ } else if (iq_error is IqError.RESOURCE_CONSTRAINT) {
+ error = new ErrorStanza.resource_constraint(iq_error.message);
} else {
assert_not_reached();
}
@@ -40,7 +47,7 @@ public errordomain Error {
TRANSPORT_ERROR,
}
-StanzaNode get_single_node_anyns(StanzaNode parent, string node_name) throws IqError {
+StanzaNode? get_single_node_anyns(StanzaNode parent, string node_name) throws IqError {
StanzaNode? result = null;
foreach (StanzaNode child in parent.get_all_subnodes()) {
if (child.name == node_name) {
@@ -50,12 +57,51 @@ StanzaNode get_single_node_anyns(StanzaNode parent, string node_name) throws IqE
result = child;
}
}
- if (result == null) {
- throw new IqError.BAD_REQUEST(@"missing $(node_name) node");
- }
return result;
}
+class ContentNode {
+ public Role creator;
+ public string name;
+ public StanzaNode? description;
+ public StanzaNode? transport;
+}
+
+ContentNode get_single_content_node(StanzaNode jingle) throws IqError {
+ Gee.List<StanzaNode> contents = jingle.get_subnodes("content");
+ if (contents.size == 0) {
+ throw new IqError.BAD_REQUEST("missing content node");
+ }
+ if (contents.size > 1) {
+ throw new IqError.NOT_IMPLEMENTED("can't process multiple content nodes");
+ }
+ StanzaNode content = contents[0];
+ string? creator_str = content.get_attribute("creator");
+ // Vala can't typecheck the ternary operator here.
+ Role? creator = null;
+ if (creator_str != null) {
+ creator = Role.parse(creator_str);
+ } else {
+ // TODO(hrxi): now, is the creator attribute optional or not (XEP-0166
+ // Jingle)?
+ creator = Role.INITIATOR;
+ }
+
+ string? name = content.get_attribute("name");
+ StanzaNode? description = get_single_node_anyns(content, "description");
+ StanzaNode? transport = get_single_node_anyns(content, "transport");
+ if (name == null || creator == null) {
+ throw new IqError.BAD_REQUEST("missing name or creator");
+ }
+
+ return new ContentNode() {
+ creator=creator,
+ name=name,
+ description=description,
+ transport=transport
+ };
+}
+
public class Module : XmppStreamModule, Iq.Handler {
public static Xmpp.ModuleIdentity<Module> IDENTITY = new Xmpp.ModuleIdentity<Module>(NS_URI, "0166_jingle");
@@ -88,16 +134,21 @@ public class Module : XmppStreamModule, Iq.Handler {
return transports[ns_uri];
}
public Transport? select_transport(XmppStream stream, TransportType type, Jid receiver_full_jid) {
+ Transport? result = null;
foreach (Transport transport in transports.values) {
if (transport.transport_type() != type) {
continue;
}
- // TODO(hrxi): prioritization
if (transport.is_transport_available(stream, receiver_full_jid)) {
- return transport;
+ if (result != null) {
+ if (result.transport_priority() >= transport.transport_priority()) {
+ continue;
+ }
+ }
+ result = transport;
}
}
- return null;
+ return result;
}
private bool is_jingle_available(XmppStream stream, Jid full_jid) {
@@ -121,8 +172,8 @@ public class Module : XmppStreamModule, Iq.Handler {
if (my_jid == null) {
throw new Error.GENERAL("Couldn't determine own JID");
}
- TransportParameters transport_params = transport.create_transport_parameters();
- Session session = new Session.initiate_sent(random_uuid(), type, transport_params, receiver_full_jid, content_name, stream);
+ TransportParameters transport_params = transport.create_transport_parameters(stream, my_jid, receiver_full_jid);
+ Session session = new Session.initiate_sent(random_uuid(), type, transport_params, my_jid, receiver_full_jid, content_name, stream);
StanzaNode content = new StanzaNode.build("content", NS_URI)
.put_attribute("creator", "initiator")
.put_attribute("name", content_name)
@@ -146,38 +197,31 @@ public class Module : XmppStreamModule, Iq.Handler {
}
public void handle_session_initiate(XmppStream stream, string sid, StanzaNode jingle, Iq.Stanza iq) throws IqError {
- Gee.List<StanzaNode> contents = jingle.get_subnodes("content");
- if (contents.size == 0) {
- throw new IqError.BAD_REQUEST("missing content node");
- }
- if (contents.size > 1) {
- throw new IqError.NOT_IMPLEMENTED("can't process multiple content nodes");
+ ContentNode content = get_single_content_node(jingle);
+ if (content.description == null || content.transport == null) {
+ throw new IqError.BAD_REQUEST("missing description or transport node");
}
- StanzaNode content = contents[0];
- string? name = content.get_attribute("name");
- StanzaNode description = get_single_node_anyns(content, "description");
- StanzaNode transport_node = get_single_node_anyns(content, "transport");
- if (name == null) {
- throw new IqError.BAD_REQUEST("missing name");
+ Jid? my_jid = stream.get_flag(Bind.Flag.IDENTITY).my_jid;
+ if (my_jid == null) {
+ throw new IqError.RESOURCE_CONSTRAINT("Couldn't determine own JID");
}
-
- Transport? transport = get_transport(transport_node.ns_uri);
+ Transport? transport = get_transport(content.transport.ns_uri);
TransportParameters? transport_params = null;
if (transport != null) {
- transport_params = transport.parse_transport_parameters(transport_node);
+ transport_params = transport.parse_transport_parameters(stream, my_jid, iq.from, content.transport);
} else {
// terminate the session below
}
- ContentType? content_type = get_content_type(description.ns_uri);
+ ContentType? content_type = get_content_type(content.description.ns_uri);
if (content_type == null) {
// TODO(hrxi): how do we signal an unknown content type?
throw new IqError.NOT_IMPLEMENTED("unknown content type");
}
- ContentParameters content_params = content_type.parse_content_parameters(description);
+ ContentParameters content_params = content_type.parse_content_parameters(content.description);
TransportType type = content_type.content_type_transport_type();
- Session session = new Session.initiate_received(sid, type, transport_params, iq.from, name, stream);
+ Session session = new Session.initiate_received(sid, type, transport_params, my_jid, iq.from, content.name, stream);
stream.get_flag(Flag.IDENTITY).add_session(session);
stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.result(iq));
@@ -254,15 +298,20 @@ public interface Transport : Object {
public abstract string transport_ns_uri();
public abstract bool is_transport_available(XmppStream stream, Jid full_jid);
public abstract TransportType transport_type();
- public abstract TransportParameters create_transport_parameters();
- public abstract TransportParameters parse_transport_parameters(StanzaNode transport) throws IqError;
+ public abstract int transport_priority();
+ public abstract TransportParameters create_transport_parameters(XmppStream stream, Jid local_full_jid, Jid peer_full_jid);
+ public abstract TransportParameters parse_transport_parameters(XmppStream stream, Jid local_full_jid, Jid peer_full_jid, StanzaNode transport) throws IqError;
}
+
+// Gets a null `stream` if connection setup was unsuccessful and another
+// transport method should be tried.
public interface TransportParameters : Object {
public abstract string transport_ns_uri();
public abstract StanzaNode to_transport_stanza_node();
- public abstract void update_transport(StanzaNode transport) throws IqError;
- public abstract IOStream create_transport_connection(XmppStream stream, Jid peer_full_jid, Role role);
+ public abstract void on_transport_accept(StanzaNode transport) throws IqError;
+ public abstract void on_transport_info(StanzaNode transport) throws IqError;
+ public abstract void create_transport_connection(XmppStream stream, Session session);
}
public enum Role {
@@ -276,6 +325,14 @@ public enum Role {
}
assert_not_reached();
}
+
+ public static Role parse(string role) throws IqError {
+ switch (role) {
+ case "initiator": return INITIATOR;
+ case "responder": return RESPONDER;
+ }
+ throw new IqError.BAD_REQUEST(@"invalid role $(role)");
+ }
}
public interface ContentType : Object {
@@ -290,11 +347,12 @@ public interface ContentParameters : Object {
public class Session {
- // INITIATE_SENT -> ACTIVE -> ENDED
- // INITIATE_RECEIVED -> ACTIVE -> ENDED
+ // INITIATE_SENT -> CONNECTING -> ACTIVE -> ENDED
+ // INITIATE_RECEIVED -> CONNECTING -> ACTIVE -> ENDED
public enum State {
INITIATE_SENT,
INITIATE_RECEIVED,
+ CONNECTING,
ACTIVE,
ENDED,
}
@@ -303,38 +361,39 @@ public class Session {
public string sid { get; private set; }
public Type type_ { get; private set; }
+ public Jid local_full_jid { get; private set; }
public Jid peer_full_jid { get; private set; }
+ public Role content_creator { get; private set; }
public string content_name { get; private set; }
- // INITIATE_SENT | INITIATE_RECEIVED
- TransportParameters? transport = null;
+ private Connection connection;
+ public IOStream conn { get { return connection; } }
- // ACTIVE
- private Connection? connection;
- public IOStream? conn { get { return connection; } }
-
- // Only interesting in INITIATE_SENT.
- // Signals that the session has been accepted by the peer.
- public signal void accepted(XmppStream stream);
+ // INITIATE_SENT | INITIATE_RECEIVED | CONNECTING
+ TransportParameters? transport = null;
XmppStream hack;
- public Session.initiate_sent(string sid, Type type, TransportParameters transport, Jid peer_full_jid, string content_name, XmppStream hack) {
+ public Session.initiate_sent(string sid, Type type, TransportParameters transport, Jid local_full_jid, Jid peer_full_jid, string content_name, XmppStream hack) {
this.state = State.INITIATE_SENT;
this.sid = sid;
this.type_ = type;
+ this.local_full_jid = local_full_jid;
this.peer_full_jid = peer_full_jid;
+ this.content_creator = Role.INITIATOR;
this.content_name = content_name;
this.transport = transport;
this.connection = new Connection(this);
this.hack = hack;
}
- public Session.initiate_received(string sid, Type type, TransportParameters? transport, Jid peer_full_jid, string content_name, XmppStream hack) {
+ public Session.initiate_received(string sid, Type type, TransportParameters? transport, Jid local_full_jid, Jid peer_full_jid, string content_name, XmppStream hack) {
this.state = State.INITIATE_RECEIVED;
this.sid = sid;
this.type_ = type;
+ this.local_full_jid = local_full_jid;
this.peer_full_jid = peer_full_jid;
+ this.content_creator = Role.INITIATOR;
this.content_name = content_name;
this.transport = transport;
this.connection = new Connection(this);
@@ -352,6 +411,9 @@ public class Session {
case "session-terminate":
handle_session_terminate(stream, jingle, iq);
break;
+ case "transport-info":
+ handle_transport_info(stream, jingle, iq);
+ return;
case "content-accept":
case "content-add":
case "content-modify":
@@ -359,7 +421,6 @@ public class Session {
case "content-remove":
case "security-info":
case "transport-accept":
- case "transport-info":
case "transport-reject":
case "transport-replace":
throw new IqError.NOT_IMPLEMENTED(@"$(action) is not implemented");
@@ -379,36 +440,83 @@ public class Session {
if (!responder.is_full()) {
throw new IqError.BAD_REQUEST("invalid responder JID");
}
- Gee.List<StanzaNode> contents = jingle.get_subnodes("content");
- if (contents.size == 0) {
- // TODO(hrxi): here and below, should we terminate the session?
- throw new IqError.BAD_REQUEST("missing content node");
- }
- if (contents.size > 1) {
- throw new IqError.NOT_IMPLEMENTED("can't process multiple content nodes");
+ ContentNode content = get_single_content_node(jingle);
+ verify_content(content);
+ if (content.description == null || content.transport == null) {
+ throw new IqError.BAD_REQUEST("missing description or transport node");
}
- StanzaNode content = contents[0];
- StanzaNode description = get_single_node_anyns(content, "description");
- StanzaNode transport_node = get_single_node_anyns(content, "transport");
- if (transport_node.ns_uri != transport.transport_ns_uri()) {
+ if (content.transport.ns_uri != transport.transport_ns_uri()) {
throw new IqError.BAD_REQUEST("session-accept with unnegotiated transport method");
}
- transport.update_transport(transport_node);
- connection.set_inner(transport.create_transport_connection(stream, peer_full_jid, Role.INITIATOR));
- transport = null;
+ transport.on_transport_accept(content.transport);
+ StanzaNode description = content.description; // TODO(hrxi): handle this :P
+ state = State.CONNECTING;
stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.result(iq));
- state = State.ACTIVE;
- accepted(stream);
+ transport.create_transport_connection(stream, this);
+ }
+ void connection_created(XmppStream stream, IOStream? conn) {
+ if (state != State.CONNECTING) {
+ return;
+ }
+ if (conn != null) {
+ state = State.ACTIVE;
+ transport = null;
+ connection.set_inner(conn);
+ } else {
+ // TODO(hrxi): try negotiating other transports…
+ StanzaNode reason = new StanzaNode.build("reason", NS_URI)
+ .put_node(new StanzaNode.build("failed-transport", NS_URI));
+ terminate(stream, reason, "failed transport");
+ }
}
void handle_session_terminate(XmppStream stream, StanzaNode jingle, Iq.Stanza iq) throws IqError {
connection.on_terminated_by_jingle("remote terminated jingle session");
- state = ENDED;
+ state = State.ENDED;
stream.get_flag(Flag.IDENTITY).remove_session(sid);
stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.result(iq));
// TODO(hrxi): also handle presence type=unavailable
}
-
+ void handle_transport_info(XmppStream stream, StanzaNode jingle, Iq.Stanza iq) throws IqError {
+ if (state != State.INITIATE_RECEIVED && state != State.INITIATE_SENT && state != State.CONNECTING) {
+ stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.result(iq));
+ throw new IqError.UNSUPPORTED_INFO("transport-info unsupported after connection setup");
+ }
+ ContentNode content = get_single_content_node(jingle);
+ verify_content(content);
+ if (content.description != null || content.transport == null) {
+ throw new IqError.BAD_REQUEST("unexpected description node or missing transport node");
+ }
+ transport.on_transport_info(content.transport);
+ stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.result(iq));
+ }
+ void verify_content(ContentNode content) throws IqError {
+ if (content.name != content_name || content.creator != content_creator) {
+ throw new IqError.BAD_REQUEST("unknown content");
+ }
+ }
+ public void set_transport_connection(XmppStream stream, IOStream? conn) {
+ if (state != State.CONNECTING) {
+ return;
+ }
+ connection_created(stream, conn);
+ }
+ public void send_transport_info(XmppStream stream, StanzaNode transport) {
+ if (state != State.CONNECTING) {
+ return;
+ }
+ StanzaNode jingle = new StanzaNode.build("jingle", NS_URI)
+ .add_self_xmlns()
+ .put_attribute("action", "transport-info")
+ .put_attribute("sid", sid)
+ .put_node(new StanzaNode.build("content", NS_URI)
+ .put_attribute("creator", "initiator")
+ .put_attribute("name", content_name)
+ .put_node(transport)
+ );
+ Iq.Stanza iq = new Iq.Stanza.set(jingle) { to=peer_full_jid };
+ stream.get_module(Iq.Module.IDENTITY).send_iq(stream, iq);
+ }
public void accept(XmppStream stream, StanzaNode description) {
if (state != State.INITIATE_RECEIVED) {
return; // TODO(hrxi): what to do?
@@ -426,10 +534,8 @@ public class Session {
Iq.Stanza iq = new Iq.Stanza.set(jingle) { to=peer_full_jid };
stream.get_module(Iq.Module.IDENTITY).send_iq(stream, iq);
- connection.set_inner(transport.create_transport_connection(stream, peer_full_jid, Role.RESPONDER));
- transport = null;
-
- state = State.ACTIVE;
+ state = State.CONNECTING;
+ transport.create_transport_connection(stream, this);
}
public void reject(XmppStream stream) {
@@ -607,7 +713,6 @@ public class Connection : IOStream {
try {
return yield inner.input_stream.read_async(buffer, io_priority, cancellable);
} catch (IOError e) {
- print("read_async error\n");
handle_connection_error(e);
throw e;
}
@@ -617,7 +722,6 @@ public class Connection : IOStream {
try {
return yield inner.output_stream.write_async(buffer, io_priority, cancellable);
} catch (IOError e) {
- print("write_async error\n");
handle_connection_error(e);
throw e;
}
@@ -641,7 +745,6 @@ public class Connection : IOStream {
try {
result = yield inner.input_stream.close_async(io_priority, cancellable);
} catch (IOError e) {
- print("input_stream.close_async error\n");
if (error == null) {
error = e;
}
@@ -649,7 +752,6 @@ public class Connection : IOStream {
try {
result = (yield close_if_both_closed(io_priority, cancellable)) && result;
} catch (IOError e) {
- print("close_if_both_closed error\n");
if (error == null) {
error = e;
}
@@ -679,7 +781,6 @@ public class Connection : IOStream {
try {
result = yield inner.output_stream.close_async(io_priority, cancellable);
} catch (IOError e) {
- print("output_stream.close_async error\n");
if (error == null) {
error = e;
}
@@ -687,7 +788,6 @@ public class Connection : IOStream {
try {
result = (yield close_if_both_closed(io_priority, cancellable)) && result;
} catch (IOError e) {
- print("close_if_both_closed error\n");
if (error == null) {
error = e;
}
diff --git a/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala b/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala
index dc9851d4..867a26e3 100644
--- a/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala
+++ b/xmpp-vala/src/module/xep/0234_jingle_file_transfer.vala
@@ -162,7 +162,7 @@ public class FileTransfer : Object {
this.stream = new FileTransferInputStream(session.conn.input_stream, parameters.size);
}
- public void accept(XmppStream stream) {
+ public void accept(XmppStream stream) throws IOError {
session.accept(stream, parameters.original_description);
session.conn.output_stream.close();
}
diff --git a/xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala b/xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala
new file mode 100644
index 00000000..abe5e0a9
--- /dev/null
+++ b/xmpp-vala/src/module/xep/0260_jingle_socks5_bytestreams.vala
@@ -0,0 +1,505 @@
+using Gee;
+using Xmpp;
+using Xmpp.Xep;
+
+namespace Xmpp.Xep.JingleSocks5Bytestreams {
+
+private const string NS_URI = "urn:xmpp:jingle:transports:s5b:1";
+
+public class Module : Jingle.Transport, XmppStreamModule {
+ public static Xmpp.ModuleIdentity<Module> IDENTITY = new Xmpp.ModuleIdentity<Module>(NS_URI, "0260_jingle_socks5_bytestreams");
+
+ public override void attach(XmppStream stream) {
+ stream.get_module(Jingle.Module.IDENTITY).register_transport(this);
+ stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI);
+ }
+ public override void detach(XmppStream stream) { }
+
+ public override string get_ns() { return NS_URI; }
+ public override string get_id() { return IDENTITY.id; }
+
+ public bool is_transport_available(XmppStream stream, Jid full_jid) {
+ bool? result = stream.get_flag(ServiceDiscovery.Flag.IDENTITY).has_entity_feature(full_jid, NS_URI);
+ return result != null && result;
+ }
+
+ public string transport_ns_uri() {
+ return NS_URI;
+ }
+ public Jingle.TransportType transport_type() {
+ return Jingle.TransportType.STREAMING;
+ }
+ public int transport_priority() {
+ return 1;
+ }
+ private Gee.List<Candidate> get_local_candidates(XmppStream stream) {
+ Gee.List<Candidate> result = new ArrayList<Candidate>();
+ int i = 1 << 15;
+ foreach (Socks5Bytestreams.Proxy proxy in stream.get_module(Socks5Bytestreams.Module.IDENTITY).get_proxies(stream)) {
+ result.add(new Candidate.proxy(random_uuid(), proxy, i));
+ i -= 1;
+ }
+ return result;
+ }
+ public Jingle.TransportParameters create_transport_parameters(XmppStream stream, Jid local_full_jid, Jid peer_full_jid) {
+ Parameters result = new Parameters.create(local_full_jid, peer_full_jid, random_uuid());
+ result.local_candidates.add_all(get_local_candidates(stream));
+ return result;
+ }
+ public Jingle.TransportParameters parse_transport_parameters(XmppStream stream, Jid local_full_jid, Jid peer_full_jid, StanzaNode transport) throws Jingle.IqError {
+ Parameters result = Parameters.parse(local_full_jid, peer_full_jid, transport);
+ result.local_candidates.add_all(get_local_candidates(stream));
+ return result;
+ }
+}
+
+public enum CandidateType {
+ ASSISTED,
+ DIRECT,
+ PROXY,
+ TUNNEL;
+
+ public static CandidateType parse(string type) throws Jingle.IqError {
+ switch (type) {
+ case "assisted": return CandidateType.ASSISTED;
+ case "direct": return CandidateType.DIRECT;
+ case "proxy": return CandidateType.PROXY;
+ case "tunnel": return CandidateType.TUNNEL;
+ }
+ throw new Jingle.IqError.BAD_REQUEST(@"unknown candidate type $(type)");
+ }
+
+ public string to_string() {
+ switch (this) {
+ case ASSISTED: return "assisted";
+ case DIRECT: return "direct";
+ case PROXY: return "proxy";
+ case TUNNEL: return "tunnel";
+ }
+ assert_not_reached();
+ }
+
+ private int type_preference_impl() {
+ switch (this) {
+ case ASSISTED: return 120;
+ case DIRECT: return 126;
+ case PROXY: return 10;
+ case TUNNEL: return 110;
+ }
+ assert_not_reached();
+ }
+ public int type_preference() {
+ return type_preference_impl() << 16;
+ }
+}
+
+public class Candidate : Socks5Bytestreams.Proxy {
+ public string cid { get; private set; }
+ public int priority { get; private set; }
+ public CandidateType type_ { get; private set; }
+
+ private Candidate(string cid, string host, Jid jid, int port, int priority, CandidateType type) {
+ base(host, jid, port);
+ this.cid = cid;
+ this.priority = priority;
+ this.type_ = type;
+ }
+
+ public Candidate.build(string cid, string host, Jid jid, int port, int local_priority, CandidateType type) {
+ this(cid, host, jid, port, type.type_preference() + local_priority, type);
+ }
+ public Candidate.proxy(string cid, Socks5Bytestreams.Proxy proxy, int local_priority) {
+ this.build(cid, proxy.host, proxy.jid, proxy.port, local_priority, CandidateType.PROXY);
+ }
+
+ public static Candidate parse(StanzaNode candidate) throws Jingle.IqError {
+ string? cid = candidate.get_attribute("cid");
+ string? host = candidate.get_attribute("host");
+ string? jid_str = candidate.get_attribute("jid");
+ Jid? jid = jid_str != null ? Jid.parse(jid_str) : null;
+ int port = candidate.get_attribute("port") != null ? candidate.get_attribute_int("port") : 1080;
+ int priority = candidate.get_attribute_int("priority");
+ string? type_str = candidate.get_attribute("type");
+ CandidateType type = type_str != null ? CandidateType.parse(type_str) : CandidateType.DIRECT;
+
+ if (cid == null || host == null || jid == null || port <= 0 || priority <= 0) {
+ throw new Jingle.IqError.BAD_REQUEST("missing or invalid cid, host, jid or port");
+ }
+
+ return new Candidate(cid, host, jid, port, priority, type);
+ }
+ public StanzaNode to_xml() {
+ return new StanzaNode.build("candidate", NS_URI)
+ .put_attribute("cid", cid)
+ .put_attribute("host", host)
+ .put_attribute("jid", jid.to_string())
+ .put_attribute("port", port.to_string())
+ .put_attribute("priority", priority.to_string())
+ .put_attribute("type", type_.to_string());
+ }
+}
+
+bool bytes_equal(uint8[] a, uint8[] b) {
+ if (a.length != b.length) {
+ return false;
+ }
+ for (int i = 0; i < a.length; i++) {
+ if (a[i] != b[i]) {
+ return false;
+ }
+ }
+ return true;
+}
+
+class Parameters : Jingle.TransportParameters, Object {
+ public Jingle.Role role { get; private set; }
+ public string sid { get; private set; }
+ public string remote_dstaddr { get; private set; }
+ public string local_dstaddr { get; private set; }
+ public Gee.List<Candidate> local_candidates = new ArrayList<Candidate>();
+ public Gee.List<Candidate> remote_candidates = new ArrayList<Candidate>();
+
+ Jid peer_full_jid;
+
+ bool remote_sent_selected_candidate = false;
+ Candidate? remote_selected_candidate = null;
+ bool local_determined_selected_candidate = false;
+ Candidate? local_selected_candidate = null;
+ SocketConnection? local_selected_candidate_conn = null;
+ weak Jingle.Session? session = null;
+ XmppStream? hack = null;
+
+ string? waiting_for_activation_cid = null;
+ SourceFunc waiting_for_activation_callback;
+
+ private static string calculate_dstaddr(string sid, Jid first_jid, Jid second_jid) {
+ string hashed = sid + first_jid.to_string() + second_jid.to_string();
+ return Checksum.compute_for_string(ChecksumType.SHA1, hashed);
+ }
+ private Parameters(Jingle.Role role, string sid, Jid local_full_jid, Jid peer_full_jid, string? remote_dstaddr) {
+ this.role = role;
+ this.sid = sid;
+ this.local_dstaddr = calculate_dstaddr(sid, local_full_jid, peer_full_jid);
+ this.remote_dstaddr = remote_dstaddr ?? calculate_dstaddr(sid, peer_full_jid, local_full_jid);
+
+ this.peer_full_jid = peer_full_jid;
+ }
+ public Parameters.create(Jid local_full_jid, Jid peer_full_jid, string sid) {
+ this(Jingle.Role.INITIATOR, sid, local_full_jid, peer_full_jid, null);
+ }
+ public static Parameters parse(Jid local_full_jid, Jid peer_full_jid, StanzaNode transport) throws Jingle.IqError {
+ string? dstaddr = transport.get_attribute("dstaddr");
+ string? mode = transport.get_attribute("mode");
+ string? sid = transport.get_attribute("sid");
+ if (mode != null && mode != "tcp") {
+ throw new Jingle.IqError.BAD_REQUEST(@"unknown transport method $(mode)");
+ }
+ if (dstaddr != null && dstaddr.length > 255) {
+ throw new Jingle.IqError.BAD_REQUEST("too long dstaddr");
+ }
+ Parameters result = new Parameters(Jingle.Role.RESPONDER, sid, local_full_jid, peer_full_jid, dstaddr);
+ //result.remote_candidates.add(new Candidate("b", "0.0.0.0", new Jid("a@b/c"), 1234, 2000000000, CandidateType.PROXY));
+ foreach (StanzaNode candidate in transport.get_subnodes("candidate", NS_URI)) {
+ result.remote_candidates.add(Candidate.parse(candidate));
+ }
+ return result;
+ }
+ public string transport_ns_uri() {
+ return NS_URI;
+ }
+ public StanzaNode to_transport_stanza_node() {
+ StanzaNode transport = new StanzaNode.build("transport", NS_URI)
+ .add_self_xmlns()
+ .put_attribute("dstaddr", local_dstaddr);
+
+ if (role == Jingle.Role.INITIATOR) {
+ // Must not be included by the responder according to XEP-0260.
+ transport.put_attribute("mode", "tcp");
+ }
+
+ transport.put_attribute("sid", sid);
+ foreach (Candidate candidate in local_candidates) {
+ transport.put_node(candidate.to_xml());
+ }
+ return transport;
+ }
+ public void on_transport_accept(StanzaNode transport) throws Jingle.IqError {
+ throw new Jingle.IqError.BAD_REQUEST("blurb");
+ }
+ public void on_transport_info(StanzaNode transport) throws Jingle.IqError {
+ StanzaNode? candidate_error = transport.get_subnode("candidate-error", NS_URI);
+ StanzaNode? candidate_used = transport.get_subnode("candidate-used", NS_URI);
+ StanzaNode? activated = transport.get_subnode("activated", NS_URI);
+ int num_children = 0;
+ if (candidate_error != null) { num_children += 1; }
+ if (candidate_used != null) { num_children += 1; }
+ if (activated != null) { num_children += 1; }
+ if (num_children == 0) {
+ throw new Jingle.IqError.UNSUPPORTED_INFO("unknown transport-info");
+ } else if (num_children > 1) {
+ throw new Jingle.IqError.BAD_REQUEST("transport-info with more than one child");
+ }
+ if (candidate_error != null) {
+ handle_remote_candidate(null);
+ }
+ if (candidate_used != null) {
+ string? cid = candidate_used.get_attribute("cid");
+ if (cid == null) {
+ throw new Jingle.IqError.BAD_REQUEST("missing cid");
+ }
+ handle_remote_candidate(cid);
+ }
+ if (activated != null) {
+ string? cid = activated.get_attribute("cid");
+ if (cid == null) {
+ throw new Jingle.IqError.BAD_REQUEST("missing cid");
+ }
+ handle_activated(cid);
+ }
+ }
+ private void handle_remote_candidate(string? cid) throws Jingle.IqError {
+ if (remote_sent_selected_candidate) {
+ throw new Jingle.IqError.BAD_REQUEST("remote candidate already specified");
+ }
+ Candidate? candidate = null;
+ if (cid != null) {
+ foreach (Candidate c in local_candidates) {
+ if (c.cid == cid) {
+ candidate = c;
+ break;
+ }
+ }
+ if (candidate == null) {
+ throw new Jingle.IqError.BAD_REQUEST("unknown cid");
+ }
+ }
+ remote_sent_selected_candidate = true;
+ remote_selected_candidate = candidate;
+ try_completing_negotiation();
+ }
+ private void handle_activated(string cid) throws Jingle.IqError {
+ if (waiting_for_activation_cid == null || cid != waiting_for_activation_cid) {
+ throw new Jingle.IqError.BAD_REQUEST("unexpected proxy activation message");
+ }
+ Idle.add((owned)waiting_for_activation_callback);
+ waiting_for_activation_cid = null;
+ }
+ private void try_completing_negotiation() {
+ if (!remote_sent_selected_candidate || !local_determined_selected_candidate) {
+ return;
+ }
+
+ Candidate? remote = remote_selected_candidate;
+ Candidate? local = local_selected_candidate;
+
+ int num_candidates = 0;
+ if (remote != null) { num_candidates += 1; }
+ if (local != null) { num_candidates += 1; }
+
+ if (num_candidates == 0) {
+ // Notify Jingle of the failed transport.
+ session.set_transport_connection(hack, null);
+ return;
+ }
+
+ bool remote_wins;
+ if (num_candidates == 1) {
+ remote_wins = remote != null;
+ } else {
+ if (local.priority < remote.priority) {
+ remote_wins = true;
+ } else if (local.priority > remote.priority) {
+ remote_wins = false;
+ } else {
+ // equal priority -> XEP-0260 says that the initiator wins
+ remote_wins = role != Jingle.Role.INITIATOR;
+ }
+ }
+
+ if (!remote_wins) {
+ if (local_selected_candidate.type_ != CandidateType.PROXY) {
+ Jingle.Session? strong = session;
+ if (strong == null) {
+ return;
+ }
+ strong.set_transport_connection(hack, local_selected_candidate_conn);
+ } else {
+ wait_for_remote_activation.begin(local_selected_candidate, local_selected_candidate_conn);
+ }
+ } else {
+ connect_to_local_candidate.begin(remote_selected_candidate);
+ }
+ }
+ public async void wait_for_remote_activation(Candidate candidate, SocketConnection conn) {
+ waiting_for_activation_cid = candidate.cid;
+ waiting_for_activation_callback = wait_for_remote_activation.callback;
+ yield;
+
+ Jingle.Session? strong = session;
+ if (strong == null) {
+ return;
+ }
+ strong.set_transport_connection(hack, conn);
+ }
+ public async void connect_to_local_candidate(Candidate candidate) {
+ try {
+ SocketConnection conn = yield connect_to_socks5(candidate, local_dstaddr);
+
+ bool activation_error = false;
+ SourceFunc callback = connect_to_local_candidate.callback;
+ StanzaNode query = new StanzaNode.build("query", Socks5Bytestreams.NS_URI)
+ .add_self_xmlns()
+ .put_attribute("sid", sid)
+ .put_node(new StanzaNode.build("activate", Socks5Bytestreams.NS_URI)
+ .put_node(new StanzaNode.text(peer_full_jid.to_string()))
+ );
+ Iq.Stanza iq = new Iq.Stanza.set(query) { to=candidate.jid };
+ hack.get_module(Iq.Module.IDENTITY).send_iq(hack, iq, (stream, iq) => {
+ activation_error = iq.is_error();
+ Idle.add((owned)callback);
+ });
+ yield;
+
+ if (activation_error) {
+ throw new IOError.PROXY_FAILED("activation iq error");
+ }
+
+ Jingle.Session? strong = session;
+ if (strong == null) {
+ return;
+ }
+ strong.send_transport_info(hack, new StanzaNode.build("transport", NS_URI)
+ .add_self_xmlns()
+ .put_attribute("sid", sid)
+ .put_node(new StanzaNode.build("activated", NS_URI)
+ .put_attribute("cid", candidate.cid)
+ )
+ );
+
+ strong.set_transport_connection(hack, conn);
+ } catch (Error e) {
+ Jingle.Session? strong = session;
+ if (strong == null) {
+ return;
+ }
+ strong.send_transport_info(hack, new StanzaNode.build("transport", NS_URI)
+ .add_self_xmlns()
+ .put_attribute("sid", sid)
+ .put_node(new StanzaNode.build("proxy-error", NS_URI))
+ );
+ strong.set_transport_connection(hack, null);
+ }
+ }
+ public async SocketConnection connect_to_socks5(Candidate candidate, string dstaddr) throws Error {
+ SocketClient socket_client = new SocketClient() { timeout=3 };
+
+ string address = @"[$(candidate.host)]:$(candidate.port)";
+
+ size_t written;
+ size_t read;
+ uint8[] read_buffer = new uint8[1024];
+ ByteArray write_buffer = new ByteArray();
+
+ SocketConnection conn = yield socket_client.connect_to_host_async(address, 0);
+
+ // 05 SOCKS version 5
+ // 01 number of authentication methods: 1
+ // 00 nop authentication
+ yield conn.output_stream.write_all_async({0x05, 0x01, 0x00}, GLib.Priority.DEFAULT, null, out written);
+
+ yield conn.input_stream.read_all_async(read_buffer[0:2], GLib.Priority.DEFAULT, null, out read);
+ // 05 SOCKS version 5
+ // 01 success
+ if (read_buffer[0] != 0x05 || read_buffer[1] != 0x00) {
+ throw new IOError.PROXY_FAILED("wanted 05 00, got %02x %02x".printf(read_buffer[0], read_buffer[1]));
+ }
+
+ // 05 SOCKS version 5
+ // 01 connect
+ // 00 reserved
+ // 03 address type: domain name
+ // ?? length of the domain
+ // .. domain
+ // 00 port 0 (upper half)
+ // 00 port 0 (lower half)
+ write_buffer.append({0x05, 0x01, 0x00, 0x03});
+ write_buffer.append({(uint8)dstaddr.length});
+ write_buffer.append(dstaddr.data);
+ write_buffer.append({0x00, 0x00});
+ yield conn.output_stream.write_all_async(write_buffer.data, GLib.Priority.DEFAULT, null, out written);
+
+ yield conn.input_stream.read_all_async(read_buffer[0:write_buffer.len], GLib.Priority.DEFAULT, null, out read);
+ // 05 SOCKS version 5
+ // 00 success
+ // 00 reserved
+ // 03 address type: domain name
+ // ?? length of the domain
+ // .. domain
+ // 00 port 0 (upper half)
+ // 00 port 0 (lower half)
+ if (read_buffer[0] != 0x05 || read_buffer[1] != 0x00 || read_buffer[3] != 0x03) {
+ throw new IOError.PROXY_FAILED("wanted 05 00 ?? 03, got %02x %02x %02x %02x".printf(read_buffer[0], read_buffer[1], read_buffer[2], read_buffer[3]));
+ }
+ if (read_buffer[4] != (uint8)dstaddr.length) {
+ throw new IOError.PROXY_FAILED("wanted %02x for length, got %02x".printf(dstaddr.length, read_buffer[4]));
+ }
+ if (!bytes_equal(read_buffer[5:5+dstaddr.length], dstaddr.data)) {
+ string repr = ((string)read_buffer[5:5+dstaddr.length]).make_valid().escape();
+ throw new IOError.PROXY_FAILED(@"wanted dstaddr $(dstaddr), got $(repr)");
+ }
+ if (read_buffer[5+dstaddr.length] != 0x00 || read_buffer[5+dstaddr.length+1] != 0x00) {
+ throw new IOError.PROXY_FAILED("wanted port 00 00, got %02x %02x".printf(read_buffer[5+dstaddr.length], read_buffer[5+dstaddr.length+1]));
+ }
+
+ return conn;
+ }
+ public async void try_connecting_to_candidates(XmppStream stream, Jingle.Session session) throws Error {
+ remote_candidates.sort((c1, c2) => {
+ // sort from priorities from high to low
+ if (c1.priority < c2.priority) { return 1; }
+ if (c1.priority > c2.priority) { return -1; }
+ return 0;
+ });
+ foreach (Candidate candidate in remote_candidates) {
+ if (remote_selected_candidate != null && remote_selected_candidate.priority > candidate.priority) {
+ // Don't try candidates with lower priority than the one the
+ // peer already selected.
+ break;
+ }
+ try {
+ SocketConnection conn = yield connect_to_socks5(candidate, remote_dstaddr);
+
+ local_determined_selected_candidate = true;
+ local_selected_candidate = candidate;
+ local_selected_candidate_conn = conn;
+ session.send_transport_info(stream, new StanzaNode.build("transport", NS_URI)
+ .add_self_xmlns()
+ .put_attribute("sid", sid)
+ .put_node(new StanzaNode.build("candidate-used", NS_URI)
+ .put_attribute("cid", candidate.cid)
+ )
+ );
+ try_completing_negotiation();
+ return;
+ } catch (Error e) {
+ // An error in the connection establishment isn't fatal, just
+ // try the next candidate or respond that none of the
+ // candidates work.
+ }
+ }
+ local_determined_selected_candidate = true;
+ local_selected_candidate = null;
+ session.send_transport_info(stream, new StanzaNode.build("transport", NS_URI)
+ .add_self_xmlns()
+ .put_attribute("sid", sid)
+ .put_node(new StanzaNode.build("candidate-error", NS_URI))
+ );
+ }
+ public void create_transport_connection(XmppStream stream, Jingle.Session session) {
+ this.session = session;
+ this.hack = stream;
+ try_connecting_to_candidates.begin(stream, session);
+ }
+}
+
+}
diff --git a/xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala b/xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala
index dc2e8d7c..1a810ee8 100644
--- a/xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala
+++ b/xmpp-vala/src/module/xep/0261_jingle_in_band_bytestreams.vala
@@ -30,28 +30,38 @@ public class Module : Jingle.Transport, XmppStreamModule {
public Jingle.TransportType transport_type() {
return Jingle.TransportType.STREAMING;
}
- public Jingle.TransportParameters create_transport_parameters() {
- return new Parameters(random_uuid(), DEFAULT_BLOCKSIZE);
+ public int transport_priority() {
+ return 0;
}
- public Jingle.TransportParameters parse_transport_parameters(StanzaNode transport) throws Jingle.IqError {
- return Parameters.parse(transport);
+ public Jingle.TransportParameters create_transport_parameters(XmppStream stream, Jid local_full_jid, Jid peer_full_jid) {
+ return new Parameters.create(peer_full_jid, random_uuid());
+ }
+ public Jingle.TransportParameters parse_transport_parameters(XmppStream stream, Jid local_full_jid, Jid peer_full_jid, StanzaNode transport) throws Jingle.IqError {
+ return Parameters.parse(peer_full_jid, transport);
}
}
class Parameters : Jingle.TransportParameters, Object {
+ public Jingle.Role role { get; private set; }
+ public Jid peer_full_jid { get; private set; }
public string sid { get; private set; }
public int block_size { get; private set; }
- public Parameters(string sid, int block_size) {
+ private Parameters(Jingle.Role role, Jid peer_full_jid, string sid, int block_size) {
+ this.role = role;
+ this.peer_full_jid = peer_full_jid;
this.sid = sid;
this.block_size = block_size;
}
- public static Parameters parse(StanzaNode transport) throws Jingle.IqError {
+ public Parameters.create(Jid peer_full_jid, string sid) {
+ this(Jingle.Role.INITIATOR, peer_full_jid, sid, DEFAULT_BLOCKSIZE);
+ }
+ public static Parameters parse(Jid peer_full_jid, StanzaNode transport) throws Jingle.IqError {
string? sid = transport.get_attribute("sid");
int block_size = transport.get_attribute_int("block-size");
if (sid == null || block_size <= 0 || block_size > MAX_BLOCKSIZE) {
throw new Jingle.IqError.BAD_REQUEST("missing or invalid sid or blocksize");
}
- return new Parameters(sid, block_size);
+ return new Parameters(Jingle.Role.RESPONDER, peer_full_jid, sid, block_size);
}
public string transport_ns_uri() {
return NS_URI;
@@ -62,15 +72,18 @@ class Parameters : Jingle.TransportParameters, Object {
.put_attribute("block-size", block_size.to_string())
.put_attribute("sid", sid);
}
- public void update_transport(StanzaNode transport) throws Jingle.IqError {
- Parameters other = Parameters.parse(transport);
+ public void on_transport_accept(StanzaNode transport) throws Jingle.IqError {
+ Parameters other = Parameters.parse(peer_full_jid, transport);
if (other.sid != sid || other.block_size > block_size) {
throw new Jingle.IqError.NOT_ACCEPTABLE("invalid IBB sid or block_size");
}
block_size = other.block_size;
}
- public IOStream create_transport_connection(XmppStream stream, Jid peer_full_jid, Jingle.Role role) {
- return InBandBytestreams.Connection.create(stream, peer_full_jid, sid, block_size, role == Jingle.Role.INITIATOR);
+ public void on_transport_info(StanzaNode transport) throws Jingle.IqError {
+ throw new Jingle.IqError.UNSUPPORTED_INFO("transport-info not supported for IBBs");
+ }
+ public void create_transport_connection(XmppStream stream, Jingle.Session session) {
+ session.set_transport_connection(stream, InBandBytestreams.Connection.create(stream, peer_full_jid, sid, block_size, role == Jingle.Role.INITIATOR));
}
}