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
|
// 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/flip_server/acceptor_thread.h"
#include <errno.h>
#include <netinet/in.h>
#include <netinet/tcp.h> // For TCP_NODELAY
#include <sys/socket.h>
#include <sys/types.h>
#include <string>
#include "net/tools/flip_server/constants.h"
#include "net/tools/flip_server/flip_config.h"
#include "net/tools/flip_server/sm_connection.h"
#include "net/tools/flip_server/spdy_ssl.h"
#include "openssl/err.h"
#include "openssl/ssl.h"
namespace net {
SMAcceptorThread::SMAcceptorThread(FlipAcceptor* acceptor,
MemoryCache* memory_cache)
: SimpleThread("SMAcceptorThread"),
acceptor_(acceptor),
ssl_state_(NULL),
use_ssl_(false),
idle_socket_timeout_s_(acceptor->idle_socket_timeout_s_),
quitting_(false),
memory_cache_(memory_cache) {
if (!acceptor->ssl_cert_filename_.empty() &&
!acceptor->ssl_key_filename_.empty()) {
ssl_state_ = new SSLState;
bool use_npn = true;
if (acceptor_->flip_handler_type_ == FLIP_HANDLER_HTTP_SERVER) {
use_npn = false;
}
InitSSL(ssl_state_,
acceptor_->ssl_cert_filename_,
acceptor_->ssl_key_filename_,
use_npn,
acceptor_->ssl_session_expiry_,
acceptor_->ssl_disable_compression_);
use_ssl_ = true;
}
}
SMAcceptorThread::~SMAcceptorThread() {
for (std::vector<SMConnection*>::iterator i =
allocated_server_connections_.begin();
i != allocated_server_connections_.end();
++i) {
delete *i;
}
delete ssl_state_;
}
SMConnection* SMAcceptorThread::NewConnection() {
SMConnection* server = SMConnection::NewSMConnection(
&epoll_server_, ssl_state_, memory_cache_, acceptor_, "client_conn: ");
allocated_server_connections_.push_back(server);
VLOG(2) << ACCEPTOR_CLIENT_IDENT << "Acceptor: Making new server.";
return server;
}
SMConnection* SMAcceptorThread::FindOrMakeNewSMConnection() {
if (unused_server_connections_.empty()) {
return NewConnection();
}
SMConnection* server = unused_server_connections_.back();
unused_server_connections_.pop_back();
VLOG(2) << ACCEPTOR_CLIENT_IDENT << "Acceptor: Reusing server.";
return server;
}
void SMAcceptorThread::InitWorker() {
epoll_server_.RegisterFD(acceptor_->listen_fd_, this, EPOLLIN | EPOLLET);
}
void SMAcceptorThread::HandleConnection(int server_fd,
struct sockaddr_in* remote_addr) {
int on = 1;
int rc;
if (acceptor_->disable_nagle_) {
rc = setsockopt(server_fd,
IPPROTO_TCP,
TCP_NODELAY,
reinterpret_cast<char*>(&on),
sizeof(on));
if (rc < 0) {
close(server_fd);
LOG(ERROR) << "setsockopt() failed fd=" << server_fd;
return;
}
}
SMConnection* server_connection = FindOrMakeNewSMConnection();
if (server_connection == NULL) {
VLOG(1) << ACCEPTOR_CLIENT_IDENT << "Acceptor: Closing fd " << server_fd;
close(server_fd);
return;
}
std::string remote_ip = inet_ntoa(remote_addr->sin_addr);
server_connection->InitSMConnection(this,
NULL,
&epoll_server_,
server_fd,
std::string(),
std::string(),
remote_ip,
use_ssl_);
if (server_connection->initialized())
active_server_connections_.push_back(server_connection);
}
void SMAcceptorThread::AcceptFromListenFD() {
if (acceptor_->accepts_per_wake_ > 0) {
for (int i = 0; i < acceptor_->accepts_per_wake_; ++i) {
struct sockaddr address;
socklen_t socklen = sizeof(address);
int fd = accept(acceptor_->listen_fd_, &address, &socklen);
if (fd == -1) {
if (errno != 11) {
VLOG(1) << ACCEPTOR_CLIENT_IDENT << "Acceptor: accept fail("
<< acceptor_->listen_fd_ << "): " << errno << ": "
<< strerror(errno);
}
break;
}
VLOG(1) << ACCEPTOR_CLIENT_IDENT << " Accepted connection";
HandleConnection(fd, (struct sockaddr_in*)&address);
}
} else {
while (true) {
struct sockaddr address;
socklen_t socklen = sizeof(address);
int fd = accept(acceptor_->listen_fd_, &address, &socklen);
if (fd == -1) {
if (errno != 11) {
VLOG(1) << ACCEPTOR_CLIENT_IDENT << "Acceptor: accept fail("
<< acceptor_->listen_fd_ << "): " << errno << ": "
<< strerror(errno);
}
break;
}
VLOG(1) << ACCEPTOR_CLIENT_IDENT << "Accepted connection";
HandleConnection(fd, (struct sockaddr_in*)&address);
}
}
}
void SMAcceptorThread::HandleConnectionIdleTimeout() {
static time_t oldest_time = time(NULL);
int cur_time = time(NULL);
// Only iterate the list if we speculate that a connection is ready to be
// expired
if ((cur_time - oldest_time) < idle_socket_timeout_s_)
return;
// TODO(mbelshe): This code could be optimized, active_server_connections_
// is already in-order.
std::list<SMConnection*>::iterator iter = active_server_connections_.begin();
while (iter != active_server_connections_.end()) {
SMConnection* conn = *iter;
int elapsed_time = (cur_time - conn->last_read_time_);
if (elapsed_time > idle_socket_timeout_s_) {
conn->Cleanup("Connection idle timeout reached.");
iter = active_server_connections_.erase(iter);
continue;
}
if (conn->last_read_time_ < oldest_time)
oldest_time = conn->last_read_time_;
iter++;
}
if ((cur_time - oldest_time) >= idle_socket_timeout_s_)
oldest_time = cur_time;
}
void SMAcceptorThread::Run() {
while (!quitting_.HasBeenNotified()) {
epoll_server_.set_timeout_in_us(10 * 1000); // 10 ms
epoll_server_.WaitForEventsAndExecuteCallbacks();
if (tmp_unused_server_connections_.size()) {
VLOG(2) << "have " << tmp_unused_server_connections_.size()
<< " additional unused connections. Total = "
<< unused_server_connections_.size();
unused_server_connections_.insert(unused_server_connections_.end(),
tmp_unused_server_connections_.begin(),
tmp_unused_server_connections_.end());
tmp_unused_server_connections_.clear();
}
HandleConnectionIdleTimeout();
}
}
void SMAcceptorThread::OnEvent(int fd, EpollEvent* event) {
if (event->in_events | EPOLLIN) {
VLOG(2) << ACCEPTOR_CLIENT_IDENT
<< "Acceptor: Accepting based upon epoll events";
AcceptFromListenFD();
}
}
void SMAcceptorThread::SMConnectionDone(SMConnection* sc) {
VLOG(1) << ACCEPTOR_CLIENT_IDENT << "Done with connection.";
tmp_unused_server_connections_.push_back(sc);
}
} // namespace net
|
