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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /ipc/chromium/src/chrome/common/ipc_channel.cc
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'ipc/chromium/src/chrome/common/ipc_channel.cc')
-rw-r--r--ipc/chromium/src/chrome/common/ipc_channel.cc41
1 files changed, 41 insertions, 0 deletions
diff --git a/ipc/chromium/src/chrome/common/ipc_channel.cc b/ipc/chromium/src/chrome/common/ipc_channel.cc
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+++ b/ipc/chromium/src/chrome/common/ipc_channel.cc
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// 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 "chrome/common/ipc_channel.h"
+
+#include <limits>
+
+#include "base/atomic_sequence_num.h"
+#include "base/process_util.h"
+#include "base/rand_util.h"
+#include "base/string_util.h"
+
+namespace {
+
+// Global atomic used to guarantee channel IDs are unique.
+base::StaticAtomicSequenceNumber g_last_id;
+
+} // namespace
+
+namespace IPC {
+
+// static
+std::wstring Channel::GenerateUniqueRandomChannelID() {
+ // Note: the string must start with the current process id, this is how
+ // some child processes determine the pid of the parent.
+ //
+ // This is composed of a unique incremental identifier, the process ID of
+ // the creator, an identifier for the child instance, and a strong random
+ // component. The strong random component prevents other processes from
+ // hijacking or squatting on predictable channel names.
+
+ return StringPrintf(L"%d.%u.%d",
+ base::GetCurrentProcId(),
+ g_last_id.GetNext(),
+ base::RandInt(0, std::numeric_limits<int32_t>::max()));
+}
+
+} // namespace IPC \ No newline at end of file