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
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/tools/quic/quic_client.h"
#include <errno.h>
#include <netinet/in.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/socket.h>
#include "base/logging.h"
#include "net/quic/crypto/quic_random.h"
#include "net/quic/quic_connection.h"
#include "net/quic/quic_data_reader.h"
#include "net/quic/quic_protocol.h"
#include "net/tools/flip_server/balsa_headers.h"
#include "net/tools/quic/quic_epoll_connection_helper.h"
#include "net/tools/quic/quic_reliable_client_stream.h"
#include "net/tools/quic/quic_socket_utils.h"
#ifndef SO_RXQ_OVFL
#define SO_RXQ_OVFL 40
#endif
namespace net {
namespace tools {
const int kEpollFlags = EPOLLIN | EPOLLOUT | EPOLLET;
QuicClient::QuicClient(IPEndPoint server_address,
const string& server_hostname)
: server_address_(server_address),
server_hostname_(server_hostname),
local_port_(0),
fd_(-1),
initialized_(false),
packets_dropped_(0),
overflow_supported_(false) {
epoll_server_.set_timeout_in_us(50 * 1000);
}
QuicClient::~QuicClient() {
if (connected()) {
session()->connection()
->SendConnectionClosePacket(QUIC_PEER_GOING_AWAY, std::string());
}
}
bool QuicClient::Initialize() {
int address_family = server_address_.GetSockAddrFamily();
fd_ = socket(address_family, SOCK_DGRAM | SOCK_NONBLOCK, IPPROTO_UDP);
if (fd_ < 0) {
LOG(ERROR) << "CreateSocket() failed: " << strerror(errno);
return false;
}
int get_overflow = 1;
int rc = setsockopt(fd_, SOL_SOCKET, SO_RXQ_OVFL, &get_overflow,
sizeof(get_overflow));
if (rc < 0) {
DLOG(WARNING) << "Socket overflow detection not supported";
} else {
overflow_supported_ = true;
}
int get_local_ip = 1;
if (address_family == AF_INET) {
rc = setsockopt(fd_, IPPROTO_IP, IP_PKTINFO,
&get_local_ip, sizeof(get_local_ip));
} else {
rc = setsockopt(fd_, IPPROTO_IPV6, IPV6_RECVPKTINFO,
&get_local_ip, sizeof(get_local_ip));
}
if (rc < 0) {
LOG(ERROR) << "IP detection not supported" << strerror(errno);
return false;
}
if (bind_to_address_.size() != 0) {
client_address_ = IPEndPoint(bind_to_address_, local_port_);
} else if (address_family == AF_INET) {
IPAddressNumber any4;
CHECK(net::ParseIPLiteralToNumber("0.0.0.0", &any4));
client_address_ = IPEndPoint(any4, local_port_);
} else {
IPAddressNumber any6;
CHECK(net::ParseIPLiteralToNumber("::", &any6));
client_address_ = IPEndPoint(any6, local_port_);
}
sockaddr_storage raw_addr;
socklen_t raw_addr_len = sizeof(raw_addr);
CHECK(client_address_.ToSockAddr(reinterpret_cast<sockaddr*>(&raw_addr),
&raw_addr_len));
rc = bind(fd_,
reinterpret_cast<const sockaddr*>(&raw_addr),
sizeof(raw_addr));
if (rc < 0) {
LOG(ERROR) << "Bind failed: " << strerror(errno);
return false;
}
SockaddrStorage storage;
if (getsockname(fd_, storage.addr, &storage.addr_len) != 0 ||
!client_address_.FromSockAddr(storage.addr, storage.addr_len)) {
LOG(ERROR) << "Unable to get self address. Error: " << strerror(errno);
}
epoll_server_.RegisterFD(fd_, this, kEpollFlags);
initialized_ = true;
return true;
}
bool QuicClient::Connect() {
if (!StartConnect()) {
return false;
}
while (CryptoHandshakeInProgress()) {
WaitForEvents();
}
return session_->connection()->connected();
}
bool QuicClient::StartConnect() {
DCHECK(!connected() && initialized_);
QuicGuid guid = QuicRandom::GetInstance()->RandUint64();
session_.reset(new QuicClientSession(server_hostname_, new QuicConnection(
guid, server_address_,
new QuicEpollConnectionHelper(fd_, &epoll_server_), false)));
return session_->CryptoConnect();
}
bool QuicClient::CryptoHandshakeInProgress() {
return !session_->IsCryptoHandshakeComplete() &&
session_->connection()->connected();
}
void QuicClient::Disconnect() {
DCHECK(connected());
session()->connection()->SendConnectionClose(QUIC_PEER_GOING_AWAY);
epoll_server_.UnregisterFD(fd_);
close(fd_);
fd_ = -1;
session_.reset();
}
void QuicClient::SendRequestsAndWaitForResponse(int argc, char *argv[]) {
for (int i = 1; i < argc; ++i) {
BalsaHeaders headers;
headers.SetRequestFirstlineFromStringPieces("GET", argv[i], "HTTP/1.1");
CreateReliableClientStream()->SendRequest(headers, "", true);
}
while (WaitForEvents()) { }
}
QuicReliableClientStream* QuicClient::CreateReliableClientStream() {
DCHECK(connected());
return session_->CreateOutgoingReliableStream();
}
void QuicClient::WaitForStreamToClose(QuicStreamId id) {
DCHECK(connected());
while (!session_->IsClosedStream(id)) {
epoll_server_.WaitForEventsAndExecuteCallbacks();
}
}
bool QuicClient::WaitForEvents() {
DCHECK(connected());
epoll_server_.WaitForEventsAndExecuteCallbacks();
return session_->num_active_requests() != 0;
}
void QuicClient::OnEvent(int fd, EpollEvent* event) {
DCHECK_EQ(fd, fd_);
if (event->in_events & EPOLLIN) {
while (ReadAndProcessPacket()) {
}
}
if (event->in_events & EPOLLOUT) {
session_->connection()->OnCanWrite();
}
if (event->in_events & EPOLLERR) {
DLOG(INFO) << "Epollerr";
}
}
QuicPacketCreator::Options* QuicClient::options() {
if (session() == NULL) {
return NULL;
}
return session_->options();
}
bool QuicClient::connected() const {
return session_.get() && session_->connection() &&
session_->connection()->connected();
}
bool QuicClient::ReadAndProcessPacket() {
// Allocate some extra space so we can send an error if the server goes over
// the limit.
char buf[2 * kMaxPacketSize];
IPEndPoint server_address;
IPAddressNumber client_ip;
int bytes_read = QuicSocketUtils::ReadPacket(
fd_, buf, arraysize(buf), overflow_supported_ ? &packets_dropped_ : NULL,
&client_ip, &server_address);
if (bytes_read < 0) {
return false;
}
QuicEncryptedPacket packet(buf, bytes_read, false);
QuicGuid our_guid = session_->connection()->guid();
QuicGuid packet_guid;
if (!QuicFramer::ReadGuidFromPacket(packet, &packet_guid)) {
DLOG(INFO) << "Could not read GUID from packet";
return true;
}
if (packet_guid != our_guid) {
DLOG(INFO) << "Ignoring packet from unexpected GUID: "
<< packet_guid << " instead of " << our_guid;
return true;
}
IPEndPoint client_address(client_ip, client_address_.port());
session_->connection()->ProcessUdpPacket(
client_address, server_address, packet);
return true;
}
} // namespace tools
} // namespace net
|
