Upstream changes making ListenSocket an abstract class.

net/base/listen_socket.cc

 // 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 "build/build_config.h"
-
-#if defined(OS_WIN)
-// winsock2.h must be included first in order to ensure it is included before
-// windows.h.
-#include <winsock2.h>
-#elif defined(OS_POSIX)
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include "net/base/net_errors.h"
-#endif
-
-#include "base/eintr_wrapper.h"
-#include "base/sys_byteorder.h"
-#include "base/threading/platform_thread.h"
-#include "net/base/net_util.h"
 #include "net/base/listen_socket.h"
 
-#if defined(OS_WIN)
-typedef int socklen_t;
-#endif  // defined(OS_WIN)
-
 namespace net {
 
-namespace {
+ListenSocket::ListenSocket(ListenSocketDelegate* del) : socket_delegate_(del) {}
 
-const int kReadBufSize = 4096;
-
-}  // namespace
-
-#if defined(OS_WIN)
-const SOCKET ListenSocket::kInvalidSocket = INVALID_SOCKET;
-const int ListenSocket::kSocketError = SOCKET_ERROR;
-#elif defined(OS_POSIX)
-const SOCKET ListenSocket::kInvalidSocket = -1;
-const int ListenSocket::kSocketError = -1;
-#endif
-
-ListenSocket* ListenSocket::Listen(std::string ip, int port,
-                                   ListenSocketDelegate* del) {
-  SOCKET s = Listen(ip, port);
-  if (s == kInvalidSocket) {
-    // TODO(erikkay): error handling
-  } else {
-    ListenSocket* sock = new ListenSocket(s, del);
-    sock->Listen();
-    return sock;
-  }
-  return NULL;
-}
+ListenSocket::~ListenSocket() {}
 
 void ListenSocket::Send(const char* bytes, int len, bool append_linefeed) {
   SendInternal(bytes, len);
-  if (append_linefeed) {
+  if (append_linefeed)
     SendInternal("\r\n", 2);
-  }
 }
 
 void ListenSocket::Send(const std::string& str, bool append_linefeed) {
   Send(str.data(), static_cast<int>(str.length()), append_linefeed);
 }
 
-void ListenSocket::PauseReads() {
-  DCHECK(!reads_paused_);
-  reads_paused_ = true;
-}
-
-void ListenSocket::ResumeReads() {
-  DCHECK(reads_paused_);
-  reads_paused_ = false;
-  if (has_pending_reads_) {
-    has_pending_reads_ = false;
-    Read();
-  }
-}
-
-ListenSocket::ListenSocket(SOCKET s, ListenSocketDelegate *del)
-    : socket_(s),
-      socket_delegate_(del),
-      reads_paused_(false),
-      has_pending_reads_(false) {
-#if defined(OS_WIN)
-  socket_event_ = WSACreateEvent();
-  // TODO(ibrar): error handling in case of socket_event_ == WSA_INVALID_EVENT
-  WatchSocket(NOT_WAITING);
-#elif defined(OS_POSIX)
-  wait_state_ = NOT_WAITING;
-#endif
-}
-
-ListenSocket::~ListenSocket() {
-#if defined(OS_WIN)
-  if (socket_event_) {
-    WSACloseEvent(socket_event_);
-    socket_event_ = WSA_INVALID_EVENT;
-  }
-#endif
-  CloseSocket(socket_);
-}
-
-SOCKET ListenSocket::Listen(std::string ip, int port) {
-  SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
-  if (s != kInvalidSocket) {
-#if defined(OS_POSIX)
-    // Allow rapid reuse.
-    static const int kOn = 1;
-    setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &kOn, sizeof(kOn));
-#endif
-    sockaddr_in addr;
-    memset(&addr, 0, sizeof(addr));
-    addr.sin_family = AF_INET;
-    addr.sin_addr.s_addr = inet_addr(ip.c_str());
-    addr.sin_port = base::HostToNet16(port);
-    if (bind(s, reinterpret_cast<sockaddr*>(&addr), sizeof(addr))) {
-#if defined(OS_WIN)
-      closesocket(s);
-#elif defined(OS_POSIX)
-      close(s);
-#endif
-      s = kInvalidSocket;
-    }
-  }
-  return s;
-}
-
-SOCKET ListenSocket::Accept(SOCKET s) {
-  sockaddr_in from;
-  socklen_t from_len = sizeof(from);
-  SOCKET conn =
-      HANDLE_EINTR(accept(s, reinterpret_cast<sockaddr*>(&from), &from_len));
-  if (conn != kInvalidSocket) {
-    SetNonBlocking(conn);
-  }
-  return conn;
-}
-
-void ListenSocket::SendInternal(const char* bytes, int len) {
-  char* send_buf = const_cast<char *>(bytes);
-  int len_left = len;
-  while (true) {
-    int sent = HANDLE_EINTR(send(socket_, send_buf, len_left, 0));
-    if (sent == len_left) {  // A shortcut to avoid extraneous checks.
-      break;
-    }
-    if (sent == kSocketError) {
-#if defined(OS_WIN)
-      if (WSAGetLastError() != WSAEWOULDBLOCK) {
-        LOG(ERROR) << "send failed: WSAGetLastError()==" << WSAGetLastError();
-#elif defined(OS_POSIX)
-      if (errno != EWOULDBLOCK && errno != EAGAIN) {
-        LOG(ERROR) << "send failed: errno==" << errno;
-#endif
-        break;
-      }
-      // Otherwise we would block, and now we have to wait for a retry.
-      // Fall through to PlatformThread::YieldCurrentThread()
-    } else {
-      // sent != len_left according to the shortcut above.
-      // Shift the buffer start and send the remainder after a short while.
-      send_buf += sent;
-      len_left -= sent;
-    }
-    base::PlatformThread::YieldCurrentThread();
-  }
-}
-
-void ListenSocket::Listen() {
-  int backlog = 10;  // TODO(erikkay): maybe don't allow any backlog?
-  listen(socket_, backlog);
-  // TODO(erikkay): error handling
-#if defined(OS_POSIX)
-  WatchSocket(WAITING_ACCEPT);
-#endif
-}
-
-void ListenSocket::Accept() {
-  SOCKET conn = Accept(socket_);
-  if (conn != kInvalidSocket) {
-    scoped_refptr<ListenSocket> sock(
-        new ListenSocket(conn, socket_delegate_));
-    // it's up to the delegate to AddRef if it wants to keep it around
-#if defined(OS_POSIX)
-    sock->WatchSocket(WAITING_READ);
-#endif
-    socket_delegate_->DidAccept(this, sock);
-  } else {
-    // TODO(ibrar): some error handling required here
-  }
-}
-
-void ListenSocket::Read() {
-  char buf[kReadBufSize + 1];  // +1 for null termination
-  int len;
-  do {
-    len = HANDLE_EINTR(recv(socket_, buf, kReadBufSize, 0));
-    if (len == kSocketError) {
-#if defined(OS_WIN)
-      int err = WSAGetLastError();
-      if (err == WSAEWOULDBLOCK) {
-#elif defined(OS_POSIX)
-      if (errno == EWOULDBLOCK || errno == EAGAIN) {
-#endif
-        break;
-      } else {
-        // TODO(ibrar): some error handling required here
-        break;
-      }
-    } else if (len == 0) {
-      // In Windows, Close() is called by OnObjectSignaled.  In POSIX, we need
-      // to call it here.
-#if defined(OS_POSIX)
-      Close();
-#endif
-    } else {
-      // TODO(ibrar): maybe change DidRead to take a length instead
-      DCHECK_GT(len, 0);
-      DCHECK_LE(len, kReadBufSize);
-      buf[len] = 0;  // already create a buffer with +1 length
-      socket_delegate_->DidRead(this, buf, len);
-    }
-  } while (len == kReadBufSize);
-}
-
-void ListenSocket::Close() {
-#if defined(OS_POSIX)
-  if (wait_state_ == NOT_WAITING)
-    return;
-  wait_state_ = NOT_WAITING;
-#endif
-  UnwatchSocket();
-  socket_delegate_->DidClose(this);
-}
-
-void ListenSocket::CloseSocket(SOCKET s) {
-  if (s && s != kInvalidSocket) {
-    UnwatchSocket();
-#if defined(OS_WIN)
-    closesocket(s);
-#elif defined(OS_POSIX)
-    close(s);
-#endif
-  }
-}
-
-void ListenSocket::WatchSocket(WaitState state) {
-#if defined(OS_WIN)
-  WSAEventSelect(socket_, socket_event_, FD_ACCEPT | FD_CLOSE | FD_READ);
-  watcher_.StartWatching(socket_event_, this);
-#elif defined(OS_POSIX)
-  // Implicitly calls StartWatchingFileDescriptor().
-  MessageLoopForIO::current()->WatchFileDescriptor(
-      socket_, true, MessageLoopForIO::WATCH_READ, &watcher_, this);
-  wait_state_ = state;
-#endif
-}
-
-void ListenSocket::UnwatchSocket() {
-#if defined(OS_WIN)
-  watcher_.StopWatching();
-#elif defined(OS_POSIX)
-  watcher_.StopWatchingFileDescriptor();
-#endif
-}
-
-// TODO(ibrar): We can add these functions into OS dependent files
-#if defined(OS_WIN)
-// MessageLoop watcher callback
-void ListenSocket::OnObjectSignaled(HANDLE object) {
-  WSANETWORKEVENTS ev;
-  if (kSocketError == WSAEnumNetworkEvents(socket_, socket_event_, &ev)) {
-    // TODO
-    return;
-  }
-
-  // The object was reset by WSAEnumNetworkEvents.  Watch for the next signal.
-  watcher_.StartWatching(object, this);
-
-  if (ev.lNetworkEvents == 0) {
-    // Occasionally the event is set even though there is no new data.
-    // The net seems to think that this is ignorable.
-    return;
-  }
-  if (ev.lNetworkEvents & FD_ACCEPT) {
-    Accept();
-  }
-  if (ev.lNetworkEvents & FD_READ) {
-    if (reads_paused_) {
-      has_pending_reads_ = true;
-    } else {
-      Read();
-    }
-  }
-  if (ev.lNetworkEvents & FD_CLOSE) {
-    Close();
-  }
-}
-#elif defined(OS_POSIX)
-void ListenSocket::OnFileCanReadWithoutBlocking(int fd) {
-  switch (wait_state_) {
-    case WAITING_ACCEPT:
-      Accept();
-      break;
-    case WAITING_READ:
-      if (reads_paused_) {
-        has_pending_reads_ = true;
-      } else {
-        Read();
-      }
-      break;
-    default:
-      // Close() is called by Read() in the Linux case.
-      NOTREACHED();
-      break;
-  }
-}
-
-void ListenSocket::OnFileCanWriteWithoutBlocking(int fd) {
-  // MessagePumpLibevent callback, we don't listen for write events
-  // so we shouldn't ever reach here.
-  NOTREACHED();
-}
-
-#endif
-
 }  // namespace net