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
#![deny(missing_docs)]
extern crate eui48;
extern crate futures;
#[macro_use]
extern crate slog;
#[macro_use]
extern crate serde_derive;
extern crate serde_json;
#[cfg(test)]
extern crate tempdir;
extern crate tokio_io;
extern crate tokio_core;
#[macro_use]
extern crate tokio_jsonrpc;
extern crate tokio_retry;
extern crate tokio_uds;
extern crate void;
extern crate dsrc;
extern crate libdata;
extern crate libflow;
extern crate libutils;
#[cfg(test)]
extern crate test_help;
mod server;
mod snapshot;
use std::io::Error as IoError;
use std::net::IpAddr;
use std::time::Duration;
use std::path::PathBuf;
use eui48::MacAddress;
use futures::Future;
use futures::future::{self, Loop};
use slog::Logger;
use tokio_core::reactor::Handle;
use tokio_retry::{Error as RetryError, Retry};
use tokio_retry::strategy::{self, FibonacciBackoff};
use tokio_uds::UnixStream;
use void::Void;
use dsrc::{Dsrc, Factory};
use libdata::column;
use libdata::flow::{Direction, IpProto, IpProtoRaw, Names, Port};
use libflow::update::{Cork, UpdateSender};
use libutils::LocalBoxFuture;
struct GutsDsrc;
impl Dsrc for GutsDsrc {
fn tick(&mut self, _cork: Cork) {
}
}
fn upstream_connect(logger: Logger,
handle: Handle,
socket: PathBuf,
snapshot_sender: UpdateSender)
-> LocalBoxFuture<(), IoError>
{
let retry = FibonacciBackoff::from_millis(25)
.max_delay(Duration::from_secs(5))
.map(strategy::jitter);
let convert_handle = handle.clone();
let convert_logger = logger.clone();
let connection_done = Retry::spawn(handle.clone(), retry, move || {
debug!(logger, "Connecting to upstream");
let result = UnixStream::connect(&socket, &handle);
if result.is_err() {
warn!(logger, "Connection to upstream failed: {}", result.as_ref().unwrap_err());
}
result
}).map_err(|retry_err| match retry_err {
RetryError::OperationError(e) |
RetryError::TimerError(e) => e,
}).and_then(move |connection| {
server::convert(&convert_logger, &convert_handle, connection, snapshot_sender)
});
Box::new(connection_done)
}
fn upstream_forever(logger: Logger,
handle: Handle,
socket: PathBuf,
snapshot_sender: UpdateSender)
-> LocalBoxFuture<Void, IoError>
{
let forever = future::loop_fn((), move |()| {
let logger_clone = logger.clone();
upstream_connect(logger.clone(), handle.clone(), socket.clone(), snapshot_sender.clone())
.then(move |res| {
match res {
Ok(()) => warn!(logger_clone, "Upstream connection lost"),
Err(e) => warn!(logger_clone, "Upstream connection lost: {}", e),
}
Ok(Loop::Continue(()))
})
});
Box::new(forever)
}
pub struct Guts {
path: PathBuf,
}
impl Guts {
pub fn new(path: PathBuf) -> Self {
Self {
path
}
}
}
impl Factory for Guts {
fn create(self, logger: &Logger, handle: Handle, channel: UpdateSender)
-> (Box<Dsrc>, LocalBoxFuture<(), ()>)
{
info!(logger, "Creating new guts data source");
column::register::<IpProto>();
column::register::<IpProtoRaw>();
column::register::<Direction>();
column::register_endpoint::<MacAddress>();
column::register_endpoint::<IpAddr>();
column::register_endpoint::<Names>();
column::register_endpoint::<Port>();
let child_logger = logger.new(o!("context" => "guts"));
let err_logger = child_logger.clone();
let future = upstream_forever(child_logger, handle, self.path, channel)
.map(|_| ())
.map_err(move |e| error!(err_logger, "{}", e));
(Box::new(GutsDsrc), Box::new(future))
}
}
#[cfg(test)]
mod tests {
use futures::Stream;
use futures::unsync::mpsc;
use tempdir::TempDir;
use tokio_core::reactor::{Core, Timeout};
use tokio_io::io;
use tokio_uds::UnixListener;
use super::*;
use test_help::ONE_SNAPSHOT;
#[test]
fn upstream_reconnect() {
let mut core = Core::new().unwrap();
let handle = core.handle();
let dir = TempDir::new("upstream_test").unwrap();
let path = dir.path().join("socket");
let logger = libutils::test_logger();
let (channel_snd, channel_rcv) = mpsc::channel(5);
let path_clone = path.clone();
let one_snapshot = ONE_SNAPSHOT.as_bytes();
let timer = Timeout::new(Duration::from_millis(500), &handle)
.unwrap()
.and_then(move |_| {
let listener = UnixListener::bind(path_clone, &handle).unwrap();
listener.incoming()
.into_future()
.map(|(conn, _)| conn.unwrap().0)
.map_err(|(e, _)| e)
})
.and_then(move |conn| {
io::write_all(conn, one_snapshot)
})
.and_then(|(conn, _)| io::flush(conn))
.and_then(|conn| {
drop(conn);
Ok(())
});
let connection_finished = upstream_connect(logger, core.handle(), path, channel_snd);
let snapshot = channel_rcv.into_future()
.map(|(rep, _)| rep.unwrap())
.map_err(|_| panic!());
let all = connection_finished.join3(snapshot, timer);
core.run(all).unwrap();
}
#[test]
fn upstream_forever_retry() {
let mut core = Core::new().unwrap();
let handle = core.handle();
let dir = TempDir::new("upstream_forever").unwrap();
let path = dir.path().join("socket");
let logger = libutils::test_logger();
let (channel_snd, channel_rcv) = mpsc::channel(5);
let listener = UnixListener::bind(&path, &handle).unwrap();
let accepts = listener.incoming()
.for_each(|(conn, _)| {
let one_snapshot = ONE_SNAPSHOT.as_bytes();
io::write_all(conn, one_snapshot)
.and_then(|(conn, _)| {
let garbage = &ONE_SNAPSHOT.as_bytes()[..5];
io::write_all(conn, garbage)
})
.and_then(|(conn, _)| io::flush(conn))
.and_then(|conn| {
drop(conn);
Ok(())
})
})
.map_err(|e| panic!("error: {}", e));
handle.spawn(accepts);
let upstream = upstream_forever(logger, handle.clone(), path, channel_snd)
.map(|_| ())
.map_err(|e| panic!("error: {}", e));
handle.spawn(upstream);
let snapshots = channel_rcv.take(3).collect();
let snapshots_received = core.run(snapshots).unwrap();
assert_eq!(3, snapshots_received.len());
}
}