Socket subsystem implementation

libraries/nacl-mounts/net/TcpServerSocket.cc

+// Copyright (c) 2012 The Chromium OS 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/TcpServerSocket.h"
+
+#include <assert.h>
+#include <string.h>
+
+#include "ppapi/cpp/private/net_address_private.h"
+#include "../net/SocketSubSystem.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/module.h"
+#include "../util/DebugPrint.h"
+#include "../util/PthreadHelpers.h"
+
+TCPServerSocket::TCPServerSocket(SocketSubSystem* sys, int oflag,
+                                 const sockaddr* saddr, socklen_t addrlen)
+  : ref_(1), oflag_(oflag), factory_(this), socket_(NULL),
+    resource_(0), sys_(sys) {
+  assert(sizeof(sin6_) >= addrlen);
+  memcpy(&sin6_, saddr, std::min(sizeof(sin6_), addrlen));
+}
+
+TCPServerSocket::~TCPServerSocket() {
+  assert(!socket_);
+  assert(!ref_);
+}
+
+void TCPServerSocket::addref() {
+  ++ref_;
+}
+
+void TCPServerSocket::release() {
+  if (!--ref_)
+    delete this;
+}
+
+int TCPServerSocket::read(char* buf, size_t count, size_t* nread) {
+  return -1;
+}
+
+int TCPServerSocket::write(const char* buf, size_t count, size_t* nwrote) {
+  return -1;
+}
+
+void TCPServerSocket::close() {
+  SimpleAutoLock lock(sys_->mutex());
+  if (socket_) {
+    int32_t result = PP_OK_COMPLETIONPENDING;
+    pp::Module::Get()->core()->CallOnMainThread(0,
+        factory_.NewCallback(&TCPServerSocket::Close, &result));
+    while (result == PP_OK_COMPLETIONPENDING)
+      sys_->cond().wait(sys_->mutex());
+  }
+}
+
+int TCPServerSocket::fcntl(int cmd,  va_list ap) {
+  if (cmd == F_GETFL) {
+    return oflag_;
+  } else if (cmd == F_SETFL) {
+    oflag_ = va_arg(ap, long);
+    return 0;
+  } else {
+    return -1;
+  }
+}
+
+bool TCPServerSocket::is_read_ready() {
+  return !is_open() || resource_;
+}
+
+bool TCPServerSocket::is_write_ready() {
+  return !is_open();
+}
+
+bool TCPServerSocket::is_exception() {
+  return !is_open();
+}
+
+bool TCPServerSocket::listen(int backlog) {
+  SimpleAutoLock lock(sys_->mutex());
+  int32_t result = PP_OK_COMPLETIONPENDING;
+  pp::Module::Get()->core()->CallOnMainThread(0,
+      factory_.NewCallback(&TCPServerSocket::Listen, backlog, &result));
+  while (result == PP_OK_COMPLETIONPENDING)
+    sys_->cond().wait(sys_->mutex());
+  return result == PP_OK;
+}
+
+PP_Resource TCPServerSocket::accept() {
+  if (!resource_)
+    return 0;
+
+  PP_Resource ret = resource_;
+  resource_ = 0;
+  pp::Module::Get()->core()->CallOnMainThread(0,
+      factory_.NewCallback(&TCPServerSocket::Accept,
+                           static_cast<int32_t*>(NULL)));
+
+  return ret;
+}
+
+bool TCPServerSocket::CreateNetAddress(const sockaddr* saddr,
+                                       PP_NetAddress_Private* addr) {
+  if (saddr->sa_family == AF_INET) {
+    const sockaddr_in* sin4 = reinterpret_cast<const sockaddr_in*>(saddr);
+    if (!pp::NetAddressPrivate::CreateFromIPv4Address(
+            reinterpret_cast<const uint8_t*>(&sin4->sin_addr),
+            ntohs(sin4->sin_port), addr)) {
+      return false;
+    }
+  } else {
+    const sockaddr_in6* sin6 = reinterpret_cast<const sockaddr_in6*>(saddr);
+    if (!pp::NetAddressPrivate::CreateFromIPv6Address(
+            reinterpret_cast<const uint8_t*>(&sin6->sin6_addr), 0,
+            ntohs(sin6->sin6_port), addr)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+void TCPServerSocket::Listen(int32_t result, int backlog, int32_t* pres) {
+  SimpleAutoLock lock(sys_->mutex());
+  assert(!socket_);
+  socket_ = new pp::TCPServerSocketPrivate(sys_->instance());
+
+  PP_NetAddress_Private addr = {};
+  if (CreateNetAddress(reinterpret_cast<const sockaddr*>(&sin6_), &addr)) {
+    dbgprintf("TCPServerSocket::Listen: %s\n",
+        pp::NetAddressPrivate::Describe(addr, true).c_str());
+    *pres = socket_->Listen(&addr, backlog,
+        factory_.NewCallback(&TCPServerSocket::Accept, pres));
+  } else {
+    dbgprintf("Listen failed: %s\n",
+        pp::NetAddressPrivate::Describe(addr, true).c_str());
+    *pres = PP_ERROR_FAILED;
+  }
+  if (*pres != PP_OK_COMPLETIONPENDING) {
+    sys_->cond().broadcast();
+  }
+}
+
+void TCPServerSocket::Accept(int32_t result, int32_t* pres) {
+  SimpleAutoLock lock(sys_->mutex());
+  assert(socket_);
+  if (result == PP_OK) {
+    result = socket_->Accept(&resource_,
+        factory_.NewCallback(&TCPServerSocket::OnAccept));
+    if (result == PP_OK_COMPLETIONPENDING)
+      result = PP_OK;
+  }
+  if (pres)
+    *pres = result;
+  sys_->cond().broadcast();
+}
+
+void TCPServerSocket::OnAccept(int32_t result) {
+  SimpleAutoLock lock(sys_->mutex());
+  assert(socket_);
+  sys_->cond().broadcast();
+}
+
+void TCPServerSocket::Close(int32_t result, int32_t* pres) {
+  SimpleAutoLock lock(sys_->mutex());
+  delete socket_;
+  socket_ = NULL;
+  *pres = PP_OK;
+  sys_->cond().broadcast();
+}
+