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Replace "nice" crate with futures-based "libnice" crate

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This commit is contained in:
Jonas Herzig 2019-02-02 20:54:18 +01:00
parent 459b538794
commit 353de4ec2f
7 changed files with 375 additions and 686 deletions
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347
Cargo.lock generated
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@ -1,9 +1,17 @@
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@ -29,9 +47,24 @@ dependencies = [
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@ -75,14 +140,6 @@ dependencies = [
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@ -293,9 +396,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -359,8 +463,8 @@ dependencies = [
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"checksum webrtc-sdp 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9413222171d05c908151166439b4d682987e2f900b924a94fa3d27435679d281"
"checksum websocket 0.21.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c9faed2bff8af2ea6b9f8b917d3d00b467583f6781fe3def174a9e33c879703"
"checksum which 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e84a603e7e0b1ce1aa1ee2b109c7be00155ce52df5081590d1ffb93f4f515cb2"
"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
"checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
"checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
"checksum wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "561ed901ae465d6185fa7864d63fbd5720d0ef718366c9a4dc83cf6170d7e9ba"
"checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"

3
Cargo.toml
View file

@ -19,5 +19,6 @@ native-tls = "0.2"
protobuf = "2.0"
websocket = "0.21.1"
rtp = { git = "https://github.com/johni0702/rtp", rev = "ee8be93", features = ["openssl", "tokio"] }
nice = { git = "https://github.com/johni0702/libnice.rs", rev = "956d190" }
libnice = "0.1"
webrtc-sdp = "0.1"
openssl = "0.10"

6
README.md
View file

@ -45,11 +45,7 @@ For NATs, you additionally need to provide it with its publicly reachable IP add
```
### License
mumble-web-proxy is available under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.
Additionally, it is available under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
The GPLv2 is used because libnice.rs uses the GPLv2 which is not compatible with the AGPLv3.
The AGPLv3 is used to allow dropping of the GPLv2 when/if libnice.rs is ever dropped.
mumble-web-proxy is available under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
[Mumble]: https://wiki.mumble.info/wiki/Main_Page
[mumble-web]: https://github.com/Johni0702/mumble-web/tree/webrtc

339
gpl-2.0.txt
View file

@ -1,339 +0,0 @@
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
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General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
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When we speak of free software, we are referring to freedom, not
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To protect your rights, we need to make restrictions that forbid
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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GNU General Public License for more details.
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

159
src/connection.rs
View file

@ -1,5 +1,6 @@
use futures::stream;
use futures::{Future, Sink, Stream};
use libnice::ice;
use openssl::asn1::Asn1Time;
use openssl::hash::MessageDigest;
use openssl::pkey::{PKey, Private};
@ -15,13 +16,14 @@ use rtp::rfc5761::{MuxPacketReader, MuxPacketWriter, MuxedPacket};
use rtp::rfc5764::{DtlsSrtp, DtlsSrtpHandshakeResult};
use rtp::traits::{ReadPacket, WritePacket};
use std::collections::BTreeMap;
use std::ffi::CString;
use std::time::{Duration, Instant};
use tokio::io;
use tokio::prelude::*;
use tokio::timer::Delay;
use webrtc_sdp::attribute_type::SdpAttribute;
use error::Error;
use ice::{IceAgent, IceStream};
use mumble;
use mumble::MumbleFrame;
use protos::Mumble;
@ -93,11 +95,10 @@ pub struct Connection {
next_rtp_frame: Option<Vec<u8>>,
stream_to_be_sent: Option<Box<Stream<Item = Frame, Error = Error>>>,
ice_future: Option<Box<Future<Item = (IceAgent, IceStream), Error = Error>>>,
ice: Option<IceAgent>,
ice: Option<(ice::Agent, ice::Stream)>,
dtls_srtp_future: Option<DtlsSrtpHandshakeResult<IceStream, SslAcceptorBuilder>>,
dtls_srtp: Option<DtlsSrtp<IceStream, SslAcceptorBuilder>>,
dtls_srtp_future: Option<DtlsSrtpHandshakeResult<ice::StreamComponent, SslAcceptorBuilder>>,
dtls_srtp: Option<DtlsSrtp<ice::StreamComponent, SslAcceptorBuilder>>,
dtls_key: PKey<Private>,
dtls_cert: X509,
@ -146,7 +147,6 @@ impl Connection {
next_serverbound_frame: None,
next_rtp_frame: None,
stream_to_be_sent: None,
ice_future: None,
ice: None,
dtls_srtp_future: None,
dtls_srtp: None,
@ -190,11 +190,20 @@ impl Connection {
}
}
fn setup_ice(
&mut self,
agent: IceAgent,
stream: IceStream,
) -> impl Stream<Item = Frame, Error = Error> {
fn setup_ice(&mut self) -> impl Stream<Item = Frame, Error = Error> {
// Setup ICE agent
let mut agent = ice::Agent::new_rfc5245();
agent.set_software("mumble-web-proxy");
// Setup ICE stream
let mut stream = match agent.stream_builder(1).build() {
Ok(stream) => stream,
Err(err) => {
return stream::once(Err(io::Error::new(io::ErrorKind::Other, err).into()));
}
};
let component = stream.take_components().pop().expect("one component");
// Send WebRTC details to the client
let mut msg = Mumble::WebRTC::new();
msg.set_dtls_fingerprint(
@ -206,40 +215,24 @@ impl Connection {
.collect::<Vec<_>>()
.join(":"),
);
msg.set_ice_pwd(agent.pwd().to_owned());
msg.set_ice_ufrag(agent.ufrag().to_owned());
let webrtc_msg = Frame::Client(MumbleFrame {
msg.set_ice_pwd(stream.get_local_pwd().to_owned());
msg.set_ice_ufrag(stream.get_local_ufrag().to_owned());
let webrtc_msg = MumbleFrame {
id: mumble::MSG_WEBRTC,
bytes: msg.write_to_bytes().unwrap().into(),
});
};
// Parse ICE candidates and send them to the client
let candidate_msgs = agent
.sdp()
.lines()
.filter(|line| line.starts_with("a=candidate"))
.map(|line| line[2..].to_owned())
.map(move |candidate| {
let mut msg = Mumble::IceCandidate::new();
msg.set_content(candidate);
Frame::Client(MumbleFrame {
id: mumble::MSG_ICE_CANDIDATE,
bytes: msg.write_to_bytes().unwrap().into(),
})
})
.collect::<Vec<Frame>>();
// Store ice agent for later use
self.ice = Some(agent);
// Store ice agent and stream for later use
self.ice = Some((agent, stream));
// Prepare to accept the DTLS connection
let mut acceptor = SslAcceptor::mozilla_modern(SslMethod::dtls()).unwrap();
acceptor.set_certificate(&self.dtls_cert).unwrap();
acceptor.set_private_key(&self.dtls_key).unwrap();
// FIXME: verify remote fingerprint
self.dtls_srtp_future = Some(DtlsSrtp::handshake(stream, acceptor));
self.dtls_srtp_future = Some(DtlsSrtp::handshake(component, acceptor));
stream::iter_ok(Some(webrtc_msg).into_iter().chain(candidate_msgs))
stream::once(Ok(Frame::Client(webrtc_msg)))
}
fn handle_voice_packet(&mut self, buf: &[u8]) -> impl Stream<Item = Frame, Error = Error> {
@ -384,7 +377,7 @@ impl Connection {
fn process_packet_from_client(
&mut self,
mut frame: MumbleFrame,
) -> impl Stream<Item = Frame, Error = Error> {
) -> Box<Stream<Item = Frame, Error = Error>> {
match frame.id {
mumble::MSG_AUTHENTICATE => {
let mut message: Mumble::Authenticate =
@ -396,52 +389,50 @@ impl Connection {
// and make sure opus is marked as supported
message.set_opus(true);
self.ice_future = Some(Box::new(IceAgent::bind()));
}
let stream = self.setup_ice();
frame.bytes = message.write_to_bytes().unwrap().as_slice().into();
EitherS::A(EitherS::A(stream::once(Ok(Frame::Server(frame)))))
frame.bytes = message.write_to_bytes().unwrap().as_slice().into();
Box::new(stream::once(Ok(Frame::Server(frame))).chain(stream))
} else {
Box::new(stream::once(Ok(Frame::Server(frame))))
}
}
mumble::MSG_WEBRTC => {
let mut message: Mumble::WebRTC = protobuf::parse_from_bytes(&frame.bytes).unwrap();
println!("Got WebRTC: {:?}", message);
if let Some(ref mut agent) = self.ice {
let f1 = agent.set_remote_pwd(message.take_ice_pwd());
let f2 = agent.set_remote_ufrag(message.take_ice_ufrag());
if let Some((_, stream)) = &mut self.ice {
if let (Ok(ufrag), Ok(pwd)) = (
CString::new(message.take_ice_ufrag()),
CString::new(message.take_ice_pwd()),
) {
stream.set_remote_credentials(ufrag, pwd);
}
// FIXME trigger ICE-restart if required
// FIXME store and use remote dtls fingerprint
EitherS::B(EitherS::A(
f1.join(f2)
.map(|_| stream::empty())
.map_err(|_| {
io::Error::new(io::ErrorKind::Other, "failed to set ice creds")
})
.from_err()
.flatten_stream(),
))
} else {
EitherS::A(EitherS::B(stream::empty()))
}
Box::new(stream::empty())
}
mumble::MSG_ICE_CANDIDATE => {
let mut message: Mumble::IceCandidate =
protobuf::parse_from_bytes(&frame.bytes).unwrap();
let candidate = message.take_content();
println!("Got ice candidate: {:?}", candidate);
if let Some(ref mut agent) = self.ice {
EitherS::B(EitherS::B(
agent
.add_remote_ice_candidate(candidate)
.map(|_| stream::empty())
.map_err(|_| {
io::Error::new(io::ErrorKind::Other, "failed to add ice candidate")
})
.from_err()
.flatten_stream(),
))
} else {
EitherS::A(EitherS::B(stream::empty()))
if let Some((_, stream)) = &mut self.ice {
match format!("candidate:{}", candidate).parse() {
Ok(SdpAttribute::Candidate(candidate)) => {
stream.add_remote_candidate(candidate)
}
Ok(_) => unreachable!(),
Err(err) => {
return Box::new(stream::once(Err(io::Error::new(
io::ErrorKind::Other,
format!("Error parsing ICE candidate: {}", err),
)
.into())));
}
}
}
Box::new(stream::empty())
}
mumble::MSG_TALKING_STATE => {
let mut message: Mumble::TalkingState =
@ -451,9 +442,9 @@ impl Connection {
} else {
None
};
EitherS::A(EitherS::B(stream::empty()))
Box::new(stream::empty())
}
_ => EitherS::A(EitherS::A(stream::once(Ok(Frame::Server(frame))))),
_ => Box::new(stream::once(Ok(Frame::Server(frame)))),
}
}
@ -492,6 +483,10 @@ impl Future for Connection {
fn poll(&mut self) -> Poll<(), Error> {
'poll: loop {
if let Some((agent, _)) = &mut self.ice {
agent.poll()?;
}
// If there's a frame pending to be sent, sent it before everything else
if let Some(frame) = self.next_serverbound_frame.take() {
match self.outbound_server.start_send(frame)? {
@ -570,20 +565,20 @@ impl Future for Connection {
}
}
// Poll ice future if required
if self.ice_future.is_some() {
if let Async::Ready((agent, stream)) = self.ice_future.as_mut().unwrap().poll()? {
self.ice_future = None;
println!("ICE ready.");
let stream = self.setup_ice(agent, stream);
self.stream_to_be_sent = Some(Box::new(stream));
// Poll ice stream for new candidates
if let Some((_, stream)) = &mut self.ice {
if let Async::Ready(Some(candidate)) = stream.poll()? {
let candidate = format!("candidate:{}", candidate.to_string());
println!("Local ice candidate: {}", candidate);
// Got a new candidate, send it to the client
let mut msg = Mumble::IceCandidate::new();
msg.set_content(candidate.to_string());
let frame = Frame::Client(MumbleFrame {
id: mumble::MSG_ICE_CANDIDATE,
bytes: msg.write_to_bytes().unwrap().into(),
});
self.stream_to_be_sent = Some(Box::new(stream::once(Ok(frame))));
continue 'poll;
} else {
// wait for ice before processing futher packets to ensure
// that the WebRTC init message isn't sent too late
return Ok(Async::NotReady);
}
}

202
src/ice.rs
View file

@ -1,202 +0,0 @@
// FIXME replace with proper libnice bindings or pure-rust ICE/STUN lib
use error::Error;
use future::Either;
use futures::sync::{mpsc, oneshot};
use futures::{Future, Sink, Stream};
use nice::api_agent::Agent;
use nice::api_gobject::GMainLoop;
use nice::bindings_agent as ice_ffi;
use std::clone::Clone;
use std::sync::{Arc, Mutex};
use std::thread;
use tokio::io;
use tokio::prelude::*;
pub struct IceAgent {
ufrag: String,
pwd: String,
sdp: String,
remote_sdp_sender: mpsc::Sender<String>,
remote_ice_candidates: Vec<String>,
remote_ufrag: Option<String>,
remote_pwd: Option<String>,
}
pub struct IceStream {
receiver: mpsc::Receiver<Vec<u8>>,
sender: mpsc::Sender<Vec<u8>>,
}
impl IceAgent {
pub fn bind() -> impl Future<Item = (Self, IceStream), Error = Error> {
let (tokio_sender, thread_receiver) = mpsc::channel(10);
let (thread_sender, tokio_receiver) = mpsc::channel(10);
let (cred_sender, cred_receiver) = oneshot::channel();
let (remote_sdp_sender, remote_sdp_receiver) = mpsc::channel(10);
thread::spawn(move || {
let thread_sender = Mutex::new(thread_sender);
let mut recv_callback = Box::new(move |buf: &[u8]| {
let result = thread_sender.lock().unwrap().try_send(buf.to_vec());
if let Err(err) = result {
eprintln!("Failed to queue packet: {:?} {:?}", buf, err);
}
});
let main_loop = GMainLoop::new();
let context = main_loop.get_context();
thread::spawn(move || {
// FIXME stop at some point
main_loop.run();
});
let agent = Arc::new(Agent::new(&context, ice_ffi::NICE_COMPATIBILITY_RFC5245));
agent.set_software("mumble-web-proxy");
let stream_id = agent.add_stream(1).unwrap();
let (ufrag, pwd) = agent.get_local_credentials(stream_id).unwrap();
agent.set_stream_name(stream_id, "audio");
agent.gather_candidates(stream_id);
agent.attach_recv(stream_id, 1, &context, &mut recv_callback);
// ok, here's the thing: libnice.rs is a giant train wreck.
// It doesn't require any of the closures which it takes to be Send
// even though, considering they're called from the GMainLoop,
// they really should be. That's going to explode sooner or later.
// I have no clue how many other things are broken but one of them
// is on_candidate_gathering_done which just segfaults.
// Since I can neither be bothered to debug that mess nor to write
// new bindings or a pure-rust ice lib (yet), we'll work around the
// issue by periodically polling. FIXME
// It turns out attach_recv is also broken, so I had to go in and fix
// that but now I've already written this workaround so it's here to
// stay (at least until there's a better libnice binding).
// This will probably only give non-turn candidates which should
// be enough for our use-case.
loop {
let maybe_sdp = agent.generate_local_stream_sdp(stream_id, false);
if let Some(sdp) = maybe_sdp {
cred_sender.send((sdp, ufrag, pwd)).unwrap(); // FIXME handle shutdown
break;
}
::std::thread::sleep(::std::time::Duration::from_millis(100));
}
let remote_sdp_handler = remote_sdp_receiver.for_each(|remote_sdp: String| {
// FIXME do we need to handle invalid sdp?
agent.parse_remote_sdp(&remote_sdp).unwrap();
Ok(())
});
let packet_send_handler = thread_receiver.for_each(|packet: Vec<u8>| {
agent.send(stream_id, 1, &packet[..]);
Ok(())
});
remote_sdp_handler.join(packet_send_handler).wait().unwrap();
});
cred_receiver
.map(|(sdp, ufrag, pwd): (String, String, String)| {
(
Self {
ufrag,
pwd,
sdp,
remote_sdp_sender,
remote_ice_candidates: Vec::new(),
remote_ufrag: None,
remote_pwd: None,
},
IceStream {
receiver: tokio_receiver,
sender: tokio_sender,
},
)
})
.map_err(|err| io::Error::new(io::ErrorKind::Other, err))
.from_err()
}
pub fn pwd(&self) -> &str {
&self.pwd
}
pub fn ufrag(&self) -> &str {
&self.ufrag
}
pub fn sdp(&self) -> &str {
&self.sdp
}
pub fn set_remote_pwd(&mut self, pwd: String) -> impl Future<Item = (), Error = ()> {
self.remote_pwd = Some(pwd);
self.update_remote_sdp()
}
pub fn set_remote_ufrag(&mut self, ufrag: String) -> impl Future<Item = (), Error = ()> {
self.remote_ufrag = Some(ufrag);
self.update_remote_sdp()
}
pub fn add_remote_ice_candidate(
&mut self,
candidate: String,
) -> impl Future<Item = (), Error = ()> {
self.remote_ice_candidates.push(candidate);
self.update_remote_sdp()
}
pub fn update_remote_sdp(&self) -> impl Future<Item = (), Error = ()> {
if let (Some(pwd), Some(ufrag)) = (&self.remote_pwd, &self.remote_ufrag) {
let mut sdp = Vec::new();
sdp.push("a=ice-options:trickle".to_owned());
sdp.push("m=audio".to_owned());
for candidate in &self.remote_ice_candidates {
sdp.push("a=".to_owned() + candidate);
}
sdp.push("a=ice-pwd:".to_owned() + pwd);
sdp.push("a=ice-ufrag:".to_owned() + ufrag);
let f = self.remote_sdp_sender.clone().send(sdp.join("\n"));
Either::A(f.map(|_| ()).map_err(|_| ()))
} else {
Either::B(future::ok(()))
}
}
}
impl Read for IceStream {
fn read(&mut self, dst: &mut [u8]) -> io::Result<usize> {
match self.receiver.poll() {
Ok(Async::Ready(Some(buf))) => (&buf[..]).read(dst),
Ok(Async::Ready(None)) => Ok(0),
Ok(Async::NotReady) => Err(io::Error::new(io::ErrorKind::WouldBlock, "")),
Err(err) => panic!(err), // FIXME should we really panic here? when can this happen?
}
}
}
impl AsyncRead for IceStream {}
impl Write for IceStream {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
match self.sender.start_send(buf.to_vec()) {
Ok(AsyncSink::Ready) => Ok(buf.len()),
Ok(AsyncSink::NotReady(_)) => Err(io::Error::new(io::ErrorKind::WouldBlock, "")),
Err(err) => Err(io::Error::new(io::ErrorKind::Other, err)),
}
}
fn flush(&mut self) -> io::Result<()> {
match self.sender.poll_complete() {
Ok(Async::Ready(())) => Ok(()),
Ok(Async::NotReady) => Err(io::Error::new(io::ErrorKind::WouldBlock, "")),
Err(err) => Err(io::Error::new(io::ErrorKind::Other, err)),
}
}
}
impl AsyncWrite for IceStream {
fn shutdown(&mut self) -> io::Result<Async<()>> {
Ok(Async::Ready(())) // FIXME actually shutdown ice
}
}

5
src/main.rs
View file

@ -4,8 +4,8 @@ extern crate argparse;
extern crate byteorder;
extern crate bytes;
extern crate futures;
extern crate libnice;
extern crate native_tls;
extern crate nice;
extern crate openssl;
extern crate protobuf;
extern crate rtp;
@ -13,6 +13,7 @@ extern crate tokio;
extern crate tokio_codec;
extern crate tokio_core;
extern crate tokio_tls;
extern crate webrtc_sdp;
extern crate websocket;
use argparse::{ArgumentParser, Store};
@ -22,7 +23,6 @@ use futures::{Future, Sink, Stream};
use std::convert::Into;
use std::net::ToSocketAddrs;
use tokio::net::TcpStream;
use tokio::prelude::*;
use tokio_codec::Decoder;
use tokio_core::reactor::Core;
use tokio_tls::TlsConnector;
@ -32,7 +32,6 @@ use websocket::server::InvalidConnection;
mod connection;
mod error;
mod ice;
mod mumble;
mod utils;
mod protos {