1 // excerpts from http://code.google.com/p/muduo/
2 //
3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the License file.
5 //
6 // Author: Shuo Chen (chenshuo at chenshuo dot com)
7 
8 #include "TcpConnection.h"
9 
10 #include "logging/Logging.h"
11 #include "Channel.h"
12 #include "EventLoop.h"
13 #include "Socket.h"
14+#include "SocketsOps.h"
15 
16 #include <boost/bind.hpp>
17 
18 #include <errno.h>
19 #include <stdio.h>
20 
21 using namespace muduo;
22 
23 TcpConnection::TcpConnection(EventLoop* loop,
24                              const std::string& nameArg,
25                              int sockfd,
26                              const InetAddress& localAddr,
27                              const InetAddress& peerAddr)
28   : loop_(CHECK_NOTNULL(loop)),
29     name_(nameArg),
30     state_(kConnecting),
31     socket_(new Socket(sockfd)),
32     channel_(new Channel(loop, sockfd)),
33     localAddr_(localAddr),
34     peerAddr_(peerAddr)
35 {
36   LOG_DEBUG << "TcpConnection::ctor[" <<  name_ << "] at " << this
37             << " fd=" << sockfd;
38   channel_->setReadCallback(
39       boost::bind(&TcpConnection::handleRead, this));
40+  channel_->setWriteCallback(
41+      boost::bind(&TcpConnection::handleWrite, this));
42+  channel_->setCloseCallback(
43+      boost::bind(&TcpConnection::handleClose, this));
44+  channel_->setErrorCallback(
45+      boost::bind(&TcpConnection::handleError, this));
46 }
47 
48 TcpConnection::~TcpConnection()
49 {
50   LOG_DEBUG << "TcpConnection::dtor[" <<  name_ << "] at " << this
51             << " fd=" << channel_->fd();
52 }
53 
54 void TcpConnection::connectEstablished()
55 {
56   loop_->assertInLoopThread();
57   assert(state_ == kConnecting);
58   setState(kConnected);
59   channel_->enableReading();
60   connectionCallback_(shared_from_this());
61 }
62 
63+void TcpConnection::connectDestroyed()
64+{
65+  loop_->assertInLoopThread();
66+  assert(state_ == kConnected);
67+  setState(kDisconnected);
68+  channel_->disableAll();
69+  connectionCallback_(shared_from_this());
70+
71+  loop_->removeChannel(get_pointer(channel_));
72+}
73 
74 void TcpConnection::handleRead()
75 {
76   char buf[65536];
77   ssize_t n = ::read(channel_->fd(), buf, sizeof buf);
78+  if (n > 0) {
79     messageCallback_(shared_from_this(), buf, n);
80+  } else if (n == 0) {
81+    handleClose();
82+  } else {
83+    handleError();
84+  }
85 }
86
87+void TcpConnection::handleWrite()
88+{
89+}
90+
91+void TcpConnection::handleClose()
92+{
93+  loop_->assertInLoopThread();
94+  LOG_TRACE << "TcpConnection::handleClose state = " << state_;
95+  assert(state_ == kConnected);
96+  // we don't close fd, leave it to dtor, so we can find leaks easily.
97+  channel_->disableAll();
98+  // must be the last line
99+  closeCallback_(shared_from_this());
100+}
101+
102+void TcpConnection::handleError()
103+{
104+  int err = sockets::getSocketError(channel_->fd());
105+  LOG_ERROR << "TcpConnection::handleError [" << name_
106+            << "] - SO_ERROR = " << err << " " << strerror_tl(err);
107+}
108