1 // Copyright (C) 2018-2019, Cloudflare, Inc.
2 // All rights reserved.
3 //
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are
6 // met:
7 //
8 // * Redistributions of source code must retain the above copyright notice,
9 // this list of conditions and the following disclaimer.
10 //
11 // * Redistributions in binary form must reproduce the above copyright
12 // notice, this list of conditions and the following disclaimer in the
13 // documentation and/or other materials provided with the distribution.
14 //
15 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
16 // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
19 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
23 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27 #[macro_use]
28 extern crate log;
29
30 use std::net::ToSocketAddrs;
31
32 use ring::rand::*;
33
34 const MAX_DATAGRAM_SIZE: usize = 1350;
35
36 const HTTP_REQ_STREAM_ID: u64 = 4;
37
main()38 fn main() {
39 let mut buf = [0; 65535];
40 let mut out = [0; MAX_DATAGRAM_SIZE];
41
42 let mut args = std::env::args();
43
44 let cmd = &args.next().unwrap();
45
46 if args.len() != 1 {
47 println!("Usage: {} URL", cmd);
48 println!("\nSee tools/apps/ for more complete implementations.");
49 return;
50 }
51
52 let url = url::Url::parse(&args.next().unwrap()).unwrap();
53
54 // Setup the event loop.
55 let poll = mio::Poll::new().unwrap();
56 let mut events = mio::Events::with_capacity(1024);
57
58 // Resolve server address.
59 let peer_addr = url.to_socket_addrs().unwrap().next().unwrap();
60
61 // Bind to INADDR_ANY or IN6ADDR_ANY depending on the IP family of the
62 // server address. This is needed on macOS and BSD variants that don't
63 // support binding to IN6ADDR_ANY for both v4 and v6.
64 let bind_addr = match peer_addr {
65 std::net::SocketAddr::V4(_) => "0.0.0.0:0",
66 std::net::SocketAddr::V6(_) => "[::]:0",
67 };
68
69 // Create the UDP socket backing the QUIC connection, and register it with
70 // the event loop.
71 let socket = std::net::UdpSocket::bind(bind_addr).unwrap();
72 socket.connect(peer_addr).unwrap();
73
74 let socket = mio::net::UdpSocket::from_socket(socket).unwrap();
75 poll.register(
76 &socket,
77 mio::Token(0),
78 mio::Ready::readable(),
79 mio::PollOpt::edge(),
80 )
81 .unwrap();
82
83 // Create the configuration for the QUIC connection.
84 let mut config = quiche::Config::new(quiche::PROTOCOL_VERSION).unwrap();
85
86 // *CAUTION*: this should not be set to `false` in production!!!
87 config.verify_peer(false);
88
89 config
90 .set_application_protos(b"\x05hq-29\x05hq-28\x05hq-27\x08http/0.9")
91 .unwrap();
92
93 config.set_max_idle_timeout(5000);
94 config.set_max_udp_payload_size(MAX_DATAGRAM_SIZE as u64);
95 config.set_initial_max_data(10_000_000);
96 config.set_initial_max_stream_data_bidi_local(1_000_000);
97 config.set_initial_max_stream_data_bidi_remote(1_000_000);
98 config.set_initial_max_streams_bidi(100);
99 config.set_initial_max_streams_uni(100);
100 config.set_disable_active_migration(true);
101
102 // Generate a random source connection ID for the connection.
103 let mut scid = [0; quiche::MAX_CONN_ID_LEN];
104 SystemRandom::new().fill(&mut scid[..]).unwrap();
105
106 // Create a QUIC connection and initiate handshake.
107 let mut conn = quiche::connect(url.domain(), &scid, &mut config).unwrap();
108
109 info!(
110 "connecting to {:} from {:} with scid {}",
111 peer_addr,
112 socket.local_addr().unwrap(),
113 hex_dump(&scid)
114 );
115
116 let write = conn.send(&mut out).expect("initial send failed");
117
118 while let Err(e) = socket.send(&out[..write]) {
119 if e.kind() == std::io::ErrorKind::WouldBlock {
120 debug!("send() would block");
121 continue;
122 }
123
124 panic!("send() failed: {:?}", e);
125 }
126
127 debug!("written {}", write);
128
129 let req_start = std::time::Instant::now();
130
131 let mut req_sent = false;
132
133 loop {
134 poll.poll(&mut events, conn.timeout()).unwrap();
135
136 // Read incoming UDP packets from the socket and feed them to quiche,
137 // until there are no more packets to read.
138 'read: loop {
139 // If the event loop reported no events, it means that the timeout
140 // has expired, so handle it without attempting to read packets. We
141 // will then proceed with the send loop.
142 if events.is_empty() {
143 debug!("timed out");
144
145 conn.on_timeout();
146 break 'read;
147 }
148
149 let len = match socket.recv(&mut buf) {
150 Ok(v) => v,
151
152 Err(e) => {
153 // There are no more UDP packets to read, so end the read
154 // loop.
155 if e.kind() == std::io::ErrorKind::WouldBlock {
156 debug!("recv() would block");
157 break 'read;
158 }
159
160 panic!("recv() failed: {:?}", e);
161 },
162 };
163
164 debug!("got {} bytes", len);
165
166 // Process potentially coalesced packets.
167 let read = match conn.recv(&mut buf[..len]) {
168 Ok(v) => v,
169
170 Err(e) => {
171 error!("recv failed: {:?}", e);
172 continue 'read;
173 },
174 };
175
176 debug!("processed {} bytes", read);
177 }
178
179 debug!("done reading");
180
181 if conn.is_closed() {
182 info!("connection closed, {:?}", conn.stats());
183 break;
184 }
185
186 // Send an HTTP request as soon as the connection is established.
187 if conn.is_established() && !req_sent {
188 info!("sending HTTP request for {}", url.path());
189
190 let req = format!("GET {}\r\n", url.path());
191 conn.stream_send(HTTP_REQ_STREAM_ID, req.as_bytes(), true)
192 .unwrap();
193
194 req_sent = true;
195 }
196
197 // Process all readable streams.
198 for s in conn.readable() {
199 while let Ok((read, fin)) = conn.stream_recv(s, &mut buf) {
200 debug!("received {} bytes", read);
201
202 let stream_buf = &buf[..read];
203
204 debug!(
205 "stream {} has {} bytes (fin? {})",
206 s,
207 stream_buf.len(),
208 fin
209 );
210
211 print!("{}", unsafe {
212 std::str::from_utf8_unchecked(&stream_buf)
213 });
214
215 // The server reported that it has no more data to send, which
216 // we got the full response. Close the connection.
217 if s == HTTP_REQ_STREAM_ID && fin {
218 info!(
219 "response received in {:?}, closing...",
220 req_start.elapsed()
221 );
222
223 conn.close(true, 0x00, b"kthxbye").unwrap();
224 }
225 }
226 }
227
228 // Generate outgoing QUIC packets and send them on the UDP socket, until
229 // quiche reports that there are no more packets to be sent.
230 loop {
231 let write = match conn.send(&mut out) {
232 Ok(v) => v,
233
234 Err(quiche::Error::Done) => {
235 debug!("done writing");
236 break;
237 },
238
239 Err(e) => {
240 error!("send failed: {:?}", e);
241
242 conn.close(false, 0x1, b"fail").ok();
243 break;
244 },
245 };
246
247 if let Err(e) = socket.send(&out[..write]) {
248 if e.kind() == std::io::ErrorKind::WouldBlock {
249 debug!("send() would block");
250 break;
251 }
252
253 panic!("send() failed: {:?}", e);
254 }
255
256 debug!("written {}", write);
257 }
258
259 if conn.is_closed() {
260 info!("connection closed, {:?}", conn.stats());
261 break;
262 }
263 }
264 }
265
hex_dump(buf: &[u8]) -> String266 fn hex_dump(buf: &[u8]) -> String {
267 let vec: Vec<String> = buf.iter().map(|b| format!("{:02x}", b)).collect();
268
269 vec.join("")
270 }
271