-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
mod.rs
706 lines (605 loc) · 26.4 KB
/
mod.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
//! Shadowsocks Local Server
use std::{
io::{self, ErrorKind},
sync::Arc,
time::Duration,
};
use futures::future;
use log::trace;
use shadowsocks::{
config::Mode,
net::{AcceptOpts, ConnectOpts},
};
#[cfg(feature = "local-flow-stat")]
use crate::{config::LocalFlowStatAddress, net::FlowStat};
use crate::{
config::{Config, ConfigType, ProtocolType},
dns::build_dns_resolver,
utils::ServerHandle,
};
use self::{
context::ServiceContext,
loadbalancing::{PingBalancer, PingBalancerBuilder},
};
#[cfg(feature = "local-dns")]
use self::dns::{Dns, DnsBuilder};
#[cfg(feature = "local-fake-dns")]
use self::fake_dns::{FakeDns, FakeDnsBuilder};
#[cfg(feature = "local-http")]
use self::http::{Http, HttpBuilder};
#[cfg(feature = "local-online-config")]
use self::online_config::{OnlineConfigService, OnlineConfigServiceBuilder};
#[cfg(feature = "local-redir")]
use self::redir::{Redir, RedirBuilder};
use self::socks::{Socks, SocksBuilder};
#[cfg(feature = "local-tun")]
use self::tun::{Tun, TunBuilder};
#[cfg(feature = "local-tunnel")]
use self::tunnel::{Tunnel, TunnelBuilder};
pub mod context;
#[cfg(feature = "local-dns")]
pub mod dns;
#[cfg(feature = "local-fake-dns")]
pub mod fake_dns;
#[cfg(feature = "local-http")]
pub mod http;
pub mod loadbalancing;
pub mod net;
#[cfg(feature = "local-online-config")]
pub mod online_config;
#[cfg(feature = "local-redir")]
pub mod redir;
pub mod socks;
#[cfg(feature = "local-tun")]
pub mod tun;
#[cfg(feature = "local-tunnel")]
pub mod tunnel;
pub mod utils;
/// Default TCP Keep Alive timeout
///
/// This is borrowed from Go's `net` library's default setting
pub(crate) const LOCAL_DEFAULT_KEEPALIVE_TIMEOUT: Duration = Duration::from_secs(15);
/// Local Server instance
pub struct Server {
balancer: PingBalancer,
socks_servers: Vec<Socks>,
#[cfg(feature = "local-tunnel")]
tunnel_servers: Vec<Tunnel>,
#[cfg(feature = "local-http")]
http_servers: Vec<Http>,
#[cfg(feature = "local-tun")]
tun_servers: Vec<Tun>,
#[cfg(feature = "local-dns")]
dns_servers: Vec<Dns>,
#[cfg(feature = "local-redir")]
redir_servers: Vec<Redir>,
#[cfg(feature = "local-fake-dns")]
fake_dns_servers: Vec<FakeDns>,
#[cfg(feature = "local-flow-stat")]
local_stat_addr: Option<LocalFlowStatAddress>,
#[cfg(feature = "local-flow-stat")]
flow_stat: Arc<FlowStat>,
#[cfg(feature = "local-online-config")]
online_config: Option<OnlineConfigService>,
}
impl Server {
/// Create a shadowsocks local server
pub async fn new(config: Config) -> io::Result<Server> {
assert!(config.config_type == ConfigType::Local && !config.local.is_empty());
trace!("{:?}", config);
// Warning for Stream Ciphers
// NOTE: This will only check servers in config.
#[cfg(feature = "stream-cipher")]
for inst in config.server.iter() {
let server = &inst.config;
if server.method().is_stream() {
log::warn!("stream cipher {} for server {} have inherent weaknesses (see discussion in https://github.com/shadowsocks/shadowsocks-org/issues/36). \
DO NOT USE. It will be removed in the future.", server.method(), server.addr());
}
}
#[cfg(all(unix, not(target_os = "android")))]
if let Some(nofile) = config.nofile {
use crate::sys::set_nofile;
if let Err(err) = set_nofile(nofile) {
log::warn!("set_nofile {} failed, error: {}", nofile, err);
}
}
// Global ServiceContext template
// Each Local instance will hold a copy of its fields
let mut context = ServiceContext::new();
let mut connect_opts = ConnectOpts {
#[cfg(any(target_os = "linux", target_os = "android"))]
fwmark: config.outbound_fwmark,
#[cfg(target_os = "android")]
vpn_protect_path: config.outbound_vpn_protect_path,
bind_interface: config.outbound_bind_interface,
bind_local_addr: config.outbound_bind_addr,
..Default::default()
};
connect_opts.tcp.send_buffer_size = config.outbound_send_buffer_size;
connect_opts.tcp.recv_buffer_size = config.outbound_recv_buffer_size;
connect_opts.tcp.nodelay = config.no_delay;
connect_opts.tcp.fastopen = config.fast_open;
connect_opts.tcp.keepalive = config.keep_alive.or(Some(LOCAL_DEFAULT_KEEPALIVE_TIMEOUT));
connect_opts.tcp.mptcp = config.mptcp;
connect_opts.udp.mtu = config.udp_mtu;
context.set_connect_opts(connect_opts);
let mut accept_opts = AcceptOpts {
ipv6_only: config.ipv6_only,
..Default::default()
};
accept_opts.tcp.send_buffer_size = config.inbound_send_buffer_size;
accept_opts.tcp.recv_buffer_size = config.inbound_recv_buffer_size;
accept_opts.tcp.nodelay = config.no_delay;
accept_opts.tcp.fastopen = config.fast_open;
accept_opts.tcp.keepalive = config.keep_alive.or(Some(LOCAL_DEFAULT_KEEPALIVE_TIMEOUT));
accept_opts.tcp.mptcp = config.mptcp;
accept_opts.udp.mtu = config.udp_mtu;
context.set_accept_opts(accept_opts);
if let Some(resolver) = build_dns_resolver(
config.dns,
config.ipv6_first,
config.dns_cache_size,
context.connect_opts_ref(),
)
.await
{
context.set_dns_resolver(Arc::new(resolver));
}
if config.ipv6_first {
context.set_ipv6_first(config.ipv6_first);
}
if let Some(acl) = config.acl {
context.set_acl(Arc::new(acl));
}
context.set_security_config(&config.security);
assert!(!config.local.is_empty(), "no valid local server configuration");
// Create a service balancer for choosing between multiple servers
let balancer = {
let mut mode: Option<Mode> = None;
for local in &config.local {
mode = Some(match mode {
None => local.config.mode,
Some(m) => m.merge(local.config.mode),
});
}
let mode = mode.unwrap_or(Mode::TcpOnly);
// Load balancer will hold an individual ServiceContext
let mut balancer_builder = PingBalancerBuilder::new(Arc::new(context.clone()), mode);
// max_server_rtt have to be set before add_server
if let Some(rtt) = config.balancer.max_server_rtt {
balancer_builder.max_server_rtt(rtt);
}
if let Some(intv) = config.balancer.check_interval {
balancer_builder.check_interval(intv);
}
if let Some(intv) = config.balancer.check_best_interval {
balancer_builder.check_best_interval(intv);
}
for server in config.server {
balancer_builder.add_server(server);
}
balancer_builder.build().await?
};
let mut local_server = Server {
balancer: balancer.clone(),
socks_servers: Vec::new(),
#[cfg(feature = "local-tunnel")]
tunnel_servers: Vec::new(),
#[cfg(feature = "local-http")]
http_servers: Vec::new(),
#[cfg(feature = "local-tun")]
tun_servers: Vec::new(),
#[cfg(feature = "local-dns")]
dns_servers: Vec::new(),
#[cfg(feature = "local-redir")]
redir_servers: Vec::new(),
#[cfg(feature = "local-fake-dns")]
fake_dns_servers: Vec::new(),
#[cfg(feature = "local-flow-stat")]
local_stat_addr: config.local_stat_addr,
#[cfg(feature = "local-flow-stat")]
flow_stat: context.flow_stat(),
#[cfg(feature = "local-online-config")]
online_config: match config.online_config {
None => None,
Some(online_config) => {
let mut builder = OnlineConfigServiceBuilder::new(
Arc::new(context.clone()),
online_config.config_url,
balancer.clone(),
);
if let Some(update_interval) = online_config.update_interval {
builder.set_update_interval(update_interval);
}
Some(builder.build().await?)
}
},
};
for local_instance in config.local {
let local_config = local_instance.config;
// Clone from global ServiceContext instance
// It will shares Shadowsocks' global context, and FlowStat, DNS reverse cache
let mut context = context.clone();
// Private ACL
if let Some(acl) = local_instance.acl {
context.set_acl(Arc::new(acl))
}
let context = Arc::new(context);
let balancer = balancer.clone();
match local_config.protocol {
ProtocolType::Socks => {
let client_addr = match local_config.addr {
Some(a) => a,
None => return Err(io::Error::new(ErrorKind::Other, "socks requires local address")),
};
let mut server_builder = SocksBuilder::with_context(context.clone(), client_addr, balancer);
server_builder.set_mode(local_config.mode);
server_builder.set_socks5_auth(local_config.socks5_auth);
if let Some(c) = config.udp_max_associations {
server_builder.set_udp_capacity(c);
}
if let Some(d) = config.udp_timeout {
server_builder.set_udp_expiry_duration(d);
}
if let Some(b) = local_config.udp_addr {
server_builder.set_udp_bind_addr(b.clone());
}
if let Some(b) = local_config.udp_associate_addr {
server_builder.set_udp_associate_addr(b.clone());
}
#[cfg(target_os = "macos")]
if let Some(n) = local_config.launchd_tcp_socket_name {
server_builder.set_launchd_tcp_socket_name(n);
}
#[cfg(target_os = "macos")]
if let Some(n) = local_config.launchd_udp_socket_name {
server_builder.set_launchd_udp_socket_name(n);
}
let server = server_builder.build().await?;
local_server.socks_servers.push(server);
}
#[cfg(feature = "local-tunnel")]
ProtocolType::Tunnel => {
let client_addr = match local_config.addr {
Some(a) => a,
None => return Err(io::Error::new(ErrorKind::Other, "tunnel requires local address")),
};
let forward_addr = local_config.forward_addr.expect("tunnel requires forward address");
let mut server_builder =
TunnelBuilder::with_context(context.clone(), forward_addr.clone(), client_addr, balancer);
if let Some(c) = config.udp_max_associations {
server_builder.set_udp_capacity(c);
}
if let Some(d) = config.udp_timeout {
server_builder.set_udp_expiry_duration(d);
}
server_builder.set_mode(local_config.mode);
if let Some(udp_addr) = local_config.udp_addr {
server_builder.set_udp_bind_addr(udp_addr);
}
#[cfg(target_os = "macos")]
if let Some(n) = local_config.launchd_tcp_socket_name {
server_builder.set_launchd_tcp_socket_name(n);
}
#[cfg(target_os = "macos")]
if let Some(n) = local_config.launchd_udp_socket_name {
server_builder.set_launchd_udp_socket_name(n);
}
let server = server_builder.build().await?;
local_server.tunnel_servers.push(server);
}
#[cfg(feature = "local-http")]
ProtocolType::Http => {
let client_addr = match local_config.addr {
Some(a) => a,
None => return Err(io::Error::new(ErrorKind::Other, "http requires local address")),
};
#[allow(unused_mut)]
let mut builder = HttpBuilder::with_context(context.clone(), client_addr, balancer);
#[cfg(target_os = "macos")]
if let Some(n) = local_config.launchd_tcp_socket_name {
builder.set_launchd_tcp_socket_name(n);
}
let server = builder.build().await?;
local_server.http_servers.push(server);
}
#[cfg(feature = "local-redir")]
ProtocolType::Redir => {
let client_addr = match local_config.addr {
Some(a) => a,
None => return Err(io::Error::new(ErrorKind::Other, "redir requires local address")),
};
let mut server_builder = RedirBuilder::with_context(context.clone(), client_addr, balancer);
if let Some(c) = config.udp_max_associations {
server_builder.set_udp_capacity(c);
}
if let Some(d) = config.udp_timeout {
server_builder.set_udp_expiry_duration(d);
}
server_builder.set_mode(local_config.mode);
server_builder.set_tcp_redir(local_config.tcp_redir);
server_builder.set_udp_redir(local_config.udp_redir);
if let Some(udp_addr) = local_config.udp_addr {
server_builder.set_udp_bind_addr(udp_addr);
}
let server = server_builder.build().await?;
local_server.redir_servers.push(server);
}
#[cfg(feature = "local-dns")]
ProtocolType::Dns => {
let client_addr = match local_config.addr {
Some(a) => a,
None => return Err(io::Error::new(ErrorKind::Other, "dns requires local address")),
};
let mut server_builder = {
let local_addr = local_config.local_dns_addr.expect("missing local_dns_addr");
let remote_addr = local_config.remote_dns_addr.expect("missing remote_dns_addr");
let client_cache_size = local_config.client_cache_size.unwrap_or(5);
DnsBuilder::with_context(
context.clone(),
client_addr,
local_addr.clone(),
remote_addr.clone(),
balancer,
client_cache_size,
)
};
server_builder.set_mode(local_config.mode);
#[cfg(target_os = "macos")]
if let Some(n) = local_config.launchd_tcp_socket_name {
server_builder.set_launchd_tcp_socket_name(n);
}
#[cfg(target_os = "macos")]
if let Some(n) = local_config.launchd_udp_socket_name {
server_builder.set_launchd_udp_socket_name(n);
}
let server = server_builder.build().await?;
local_server.dns_servers.push(server);
}
#[cfg(feature = "local-tun")]
ProtocolType::Tun => {
let mut builder = TunBuilder::new(context.clone(), balancer);
if let Some(address) = local_config.tun_interface_address {
builder.address(address);
}
if let Some(address) = local_config.tun_interface_destination {
builder.destination(address);
}
if let Some(name) = local_config.tun_interface_name {
builder.name(&name);
}
if let Some(c) = config.udp_max_associations {
builder.udp_capacity(c);
}
if let Some(d) = config.udp_timeout {
builder.udp_expiry_duration(d);
}
builder.mode(local_config.mode);
#[cfg(unix)]
if let Some(fd) = local_config.tun_device_fd {
builder.file_descriptor(fd);
} else if let Some(ref fd_path) = local_config.tun_device_fd_from_path {
use std::fs;
use log::info;
use shadowsocks::net::UnixListener;
let _ = fs::remove_file(fd_path);
let listener = match UnixListener::bind(fd_path) {
Ok(l) => l,
Err(err) => {
log::error!("failed to bind uds path \"{}\", error: {}", fd_path.display(), err);
return Err(err);
}
};
info!("waiting tun's file descriptor from {}", fd_path.display());
loop {
let (mut stream, peer_addr) = listener.accept().await?;
trace!("accepted {:?} for receiving tun file descriptor", peer_addr);
let mut buffer = [0u8; 1024];
let mut fd_buffer = [0];
match stream.recv_with_fd(&mut buffer, &mut fd_buffer).await {
Ok((n, fd_size)) => {
if fd_size == 0 {
log::error!(
"client {:?} didn't send file descriptors with buffer.size {} bytes",
peer_addr,
n
);
continue;
}
info!("got file descriptor {} for tun from {:?}", fd_buffer[0], peer_addr);
builder.file_descriptor(fd_buffer[0]);
break;
}
Err(err) => {
log::error!(
"failed to receive file descriptors from {:?}, error: {}",
peer_addr,
err
);
}
}
}
}
let server = builder.build().await?;
local_server.tun_servers.push(server);
}
#[cfg(feature = "local-fake-dns")]
ProtocolType::FakeDns => {
let client_addr = match local_config.addr {
Some(a) => a,
None => return Err(io::Error::new(ErrorKind::Other, "dns requires local address")),
};
let mut builder = FakeDnsBuilder::new(client_addr);
if let Some(n) = local_config.fake_dns_ipv4_network {
builder.set_ipv4_network(n);
}
if let Some(n) = local_config.fake_dns_ipv6_network {
builder.set_ipv6_network(n);
}
if let Some(exp) = local_config.fake_dns_record_expire_duration {
builder.set_expire_duration(exp);
}
if let Some(p) = local_config.fake_dns_database_path {
builder.set_database_path(p);
}
let server = builder.build().await?;
#[cfg(feature = "local-fake-dns")]
context.add_fake_dns_manager(server.clone_manager()).await;
local_server.fake_dns_servers.push(server);
}
}
}
Ok(local_server)
}
/// Run local server
pub async fn run(self) -> io::Result<()> {
let mut vfut = Vec::new();
for svr in self.socks_servers {
vfut.push(ServerHandle(tokio::spawn(svr.run())));
}
#[cfg(feature = "local-tunnel")]
for svr in self.tunnel_servers {
vfut.push(ServerHandle(tokio::spawn(svr.run())));
}
#[cfg(feature = "local-http")]
for svr in self.http_servers {
vfut.push(ServerHandle(tokio::spawn(svr.run())));
}
#[cfg(feature = "local-tun")]
for svr in self.tun_servers {
vfut.push(ServerHandle(tokio::spawn(svr.run())));
}
#[cfg(feature = "local-dns")]
for svr in self.dns_servers {
vfut.push(ServerHandle(tokio::spawn(svr.run())));
}
#[cfg(feature = "local-redir")]
for svr in self.redir_servers {
vfut.push(ServerHandle(tokio::spawn(svr.run())));
}
#[cfg(feature = "local-fake-dns")]
for svr in self.fake_dns_servers {
vfut.push(ServerHandle(tokio::spawn(svr.run())));
}
#[cfg(feature = "local-flow-stat")]
if let Some(stat_addr) = self.local_stat_addr {
// For Android's flow statistic
let report_fut = flow_report_task(stat_addr, self.flow_stat);
vfut.push(ServerHandle(tokio::spawn(report_fut)));
}
#[cfg(feature = "local-online-config")]
if let Some(online_config) = self.online_config {
vfut.push(ServerHandle(tokio::spawn(online_config.run())));
}
let (res, ..) = future::select_all(vfut).await;
res
}
/// Get the internal server balancer
pub fn server_balancer(&self) -> &PingBalancer {
&self.balancer
}
/// Get SOCKS server instances
pub fn socks_servers(&self) -> &[Socks] {
&self.socks_servers
}
/// Get Tunnel server instances
#[cfg(feature = "local-tunnel")]
pub fn tunnel_servers(&self) -> &[Tunnel] {
&self.tunnel_servers
}
/// Get HTTP server instances
#[cfg(feature = "local-http")]
pub fn http_servers(&self) -> &[Http] {
&self.http_servers
}
/// Get Tun server instances
#[cfg(feature = "local-tun")]
pub fn tun_servers(&self) -> &[Tun] {
&self.tun_servers
}
/// Get DNS server instances
#[cfg(feature = "local-dns")]
pub fn dns_servers(&self) -> &[Dns] {
&self.dns_servers
}
/// Get Redir server instances
#[cfg(feature = "local-redir")]
pub fn redir_servers(&self) -> &[Redir] {
&self.redir_servers
}
/// Get Fake DNS instances
#[cfg(feature = "local-fake-dns")]
pub fn fake_dns_servers(&self) -> &[FakeDns] {
&self.fake_dns_servers
}
}
#[cfg(feature = "local-flow-stat")]
async fn flow_report_task(stat_addr: LocalFlowStatAddress, flow_stat: Arc<FlowStat>) -> io::Result<()> {
use std::slice;
use log::debug;
use tokio::{io::AsyncWriteExt, time};
// Local flow statistic report RPC
let timeout = Duration::from_secs(1);
loop {
// keep it as libev's default, 0.5 seconds
time::sleep(Duration::from_millis(500)).await;
let tx = flow_stat.tx();
let rx = flow_stat.rx();
let buf: [u64; 2] = [tx, rx];
let buf = unsafe { slice::from_raw_parts(buf.as_ptr() as *const _, 16) };
match stat_addr {
#[cfg(unix)]
LocalFlowStatAddress::UnixStreamPath(ref stat_path) => {
use tokio::net::UnixStream;
let mut stream = match time::timeout(timeout, UnixStream::connect(stat_path)).await {
Ok(Ok(s)) => s,
Ok(Err(err)) => {
debug!("send client flow statistic error: {}", err);
continue;
}
Err(..) => {
debug!("send client flow statistic error: timeout");
continue;
}
};
match time::timeout(timeout, stream.write_all(buf)).await {
Ok(Ok(..)) => {}
Ok(Err(err)) => {
debug!("send client flow statistic error: {}", err);
}
Err(..) => {
debug!("send client flow statistic error: timeout");
}
}
}
LocalFlowStatAddress::TcpStreamAddr(stat_addr) => {
use tokio::net::TcpStream;
let mut stream = match time::timeout(timeout, TcpStream::connect(stat_addr)).await {
Ok(Ok(s)) => s,
Ok(Err(err)) => {
debug!("send client flow statistic error: {}", err);
continue;
}
Err(..) => {
debug!("send client flow statistic error: timeout");
continue;
}
};
match time::timeout(timeout, stream.write_all(buf)).await {
Ok(Ok(..)) => {}
Ok(Err(err)) => {
debug!("send client flow statistic error: {}", err);
}
Err(..) => {
debug!("send client flow statistic error: timeout");
}
}
}
}
}
}
/// Create then run a Local Server
pub async fn run(config: Config) -> io::Result<()> {
Server::new(config).await?.run().await
}