Paul Stewart | f65320c | 2011-10-13 14:34:52 -0700 | [diff] [blame^] | 1 | // Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "shill/async_connection.h" |
| 6 | |
| 7 | #include <errno.h> |
| 8 | #include <netinet/in.h> |
| 9 | |
| 10 | #include <string> |
| 11 | |
| 12 | #include "shill/event_dispatcher.h" |
| 13 | #include "shill/ip_address.h" |
| 14 | #include "shill/sockets.h" |
| 15 | |
| 16 | using std::string; |
| 17 | |
| 18 | namespace shill { |
| 19 | |
| 20 | AsyncConnection::AsyncConnection(const string &interface_name, |
| 21 | EventDispatcher *dispatcher, |
| 22 | Sockets *sockets, |
| 23 | Callback2<bool, int>::Type *callback) |
| 24 | : interface_name_(interface_name), |
| 25 | dispatcher_(dispatcher), |
| 26 | sockets_(sockets), |
| 27 | callback_(callback), |
| 28 | fd_(-1), |
| 29 | connect_completion_callback_( |
| 30 | NewCallback(this, &AsyncConnection::OnConnectCompletion)) { } |
| 31 | |
| 32 | AsyncConnection::~AsyncConnection() { |
| 33 | Stop(); |
| 34 | } |
| 35 | |
| 36 | bool AsyncConnection::Start(const IPAddress &address, int port) { |
| 37 | DCHECK(fd_ < 0); |
| 38 | |
| 39 | fd_ = sockets_->Socket(PF_INET, SOCK_STREAM, 0); |
| 40 | if (fd_ < 0 || |
| 41 | sockets_->SetNonBlocking(fd_) < 0) { |
| 42 | error_ = sockets_->ErrorString(); |
| 43 | PLOG(ERROR) << "Async socket setup failed"; |
| 44 | Stop(); |
| 45 | return false; |
| 46 | } |
| 47 | |
| 48 | if (!interface_name_.empty() && |
| 49 | sockets_->BindToDevice(fd_, interface_name_) < 0) { |
| 50 | error_ = sockets_->ErrorString(); |
| 51 | PLOG(ERROR) << "Async socket failed to bind to device"; |
| 52 | Stop(); |
| 53 | return false; |
| 54 | } |
| 55 | |
| 56 | struct sockaddr_in iaddr; |
| 57 | CHECK_EQ(sizeof(iaddr.sin_addr.s_addr), address.GetLength()); |
| 58 | |
| 59 | memset(&iaddr, 0, sizeof(iaddr)); |
| 60 | iaddr.sin_family = AF_INET; |
| 61 | memcpy(&iaddr.sin_addr.s_addr, address.address().GetConstData(), |
| 62 | sizeof(iaddr.sin_addr.s_addr)); |
| 63 | iaddr.sin_port = htons(port); |
| 64 | |
| 65 | socklen_t addrlen = sizeof(iaddr); |
| 66 | int ret = sockets_->Connect(fd_, |
| 67 | reinterpret_cast<struct sockaddr *>(&iaddr), |
| 68 | addrlen); |
| 69 | if (ret == 0) { |
| 70 | callback_->Run(true, fd_); // Passes ownership |
| 71 | fd_ = -1; |
| 72 | return true; |
| 73 | } |
| 74 | |
| 75 | if (sockets_->Error() != EINPROGRESS) { |
| 76 | error_ = sockets_->ErrorString(); |
| 77 | PLOG(ERROR) << "Async socket connection failed"; |
| 78 | Stop(); |
| 79 | return false; |
| 80 | } |
| 81 | |
| 82 | connect_completion_handler_.reset( |
| 83 | dispatcher_->CreateReadyHandler(fd_, |
| 84 | IOHandler::kModeOutput, |
| 85 | connect_completion_callback_.get())); |
| 86 | error_ = string(); |
| 87 | |
| 88 | return true; |
| 89 | } |
| 90 | |
| 91 | void AsyncConnection::Stop() { |
| 92 | connect_completion_handler_.reset(); |
| 93 | if (fd_ >= 0) { |
| 94 | sockets_->Close(fd_); |
| 95 | fd_ = -1; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | void AsyncConnection::OnConnectCompletion(int fd) { |
| 100 | CHECK_EQ(fd_, fd); |
| 101 | |
| 102 | if (sockets_->GetSocketError(fd_) != 0) { |
| 103 | error_ = sockets_->ErrorString(); |
| 104 | PLOG(ERROR) << "Async GetSocketError returns failure"; |
| 105 | callback_->Run(false, -1); |
| 106 | } else { |
| 107 | callback_->Run(true, fd_); // Passes ownership |
| 108 | fd_ = -1; |
| 109 | } |
| 110 | Stop(); |
| 111 | } |
| 112 | |
| 113 | } // namespace shill |