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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/net/proxy_config_monitor.h"
#include <utility>
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/net/proxy_service_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "components/proxy_config/pref_proxy_config_tracker_impl.h"
#include "content/public/browser/browser_thread.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "services/network/public/mojom/network_context.mojom.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "chrome/browser/ash/profiles/profile_helper.h"
#endif // BUILDFLAG(IS_CHROMEOS)
#if BUILDFLAG(ENABLE_EXTENSIONS)
#include "chrome/browser/extensions/api/proxy/proxy_api.h"
#endif
using content::BrowserThread;
ProxyConfigMonitor::ProxyConfigMonitor(Profile* profile) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(profile);
#if BUILDFLAG(ENABLE_EXTENSIONS)
profile_ = profile;
#endif
// If this is the ChromeOS sign-in or lock screen profile, just create the
// tracker from global state.
#if BUILDFLAG(IS_CHROMEOS)
if (ash::ProfileHelper::IsSigninProfile(profile) ||
ash::ProfileHelper::IsLockScreenProfile(profile)) {
pref_proxy_config_tracker_ =
ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
g_browser_process->local_state());
}
#endif // BUILDFLAG(IS_CHROMEOS)
if (!pref_proxy_config_tracker_) {
pref_proxy_config_tracker_ =
ProxyServiceFactory::CreatePrefProxyConfigTrackerOfProfile(
profile->GetPrefs(), g_browser_process->local_state());
}
proxy_config_service_ = ProxyServiceFactory::CreateProxyConfigService(
pref_proxy_config_tracker_.get(), profile);
proxy_config_service_->AddObserver(this);
}
ProxyConfigMonitor::ProxyConfigMonitor(PrefService* local_state) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
!BrowserThread::IsThreadInitialized(BrowserThread::UI));
pref_proxy_config_tracker_ =
ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
local_state);
proxy_config_service_ = ProxyServiceFactory::CreateProxyConfigService(
pref_proxy_config_tracker_.get(), nullptr);
proxy_config_service_->AddObserver(this);
}
ProxyConfigMonitor::~ProxyConfigMonitor() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
!BrowserThread::IsThreadInitialized(BrowserThread::UI));
proxy_config_service_->RemoveObserver(this);
pref_proxy_config_tracker_->DetachFromPrefService();
}
void ProxyConfigMonitor::AddToNetworkContextParams(
network::mojom::NetworkContextParams* network_context_params) {
mojo::PendingRemote<network::mojom::ProxyConfigClient> proxy_config_client;
network_context_params->proxy_config_client_receiver =
proxy_config_client.InitWithNewPipeAndPassReceiver();
proxy_config_client_set_.Add(std::move(proxy_config_client));
if (proxy_config_service_->UsesPolling()) {
poller_receiver_set_.Add(this,
network_context_params->proxy_config_poller_client
.InitWithNewPipeAndPassReceiver());
}
#if BUILDFLAG(ENABLE_EXTENSIONS)
error_receiver_set_.Add(this, network_context_params->proxy_error_client
.InitWithNewPipeAndPassReceiver());
#endif
net::ProxyConfigWithAnnotation proxy_config;
net::ProxyConfigService::ConfigAvailability availability =
proxy_config_service_->GetLatestProxyConfig(&proxy_config);
if (availability != net::ProxyConfigService::CONFIG_PENDING)
network_context_params->initial_proxy_config = proxy_config;
}
void ProxyConfigMonitor::FlushForTesting() {
proxy_config_client_set_.FlushForTesting();
}
void ProxyConfigMonitor::OnProxyConfigChanged(
const net::ProxyConfigWithAnnotation& config,
net::ProxyConfigService::ConfigAvailability availability) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
!BrowserThread::IsThreadInitialized(BrowserThread::UI));
for (const auto& proxy_config_client : proxy_config_client_set_) {
switch (availability) {
case net::ProxyConfigService::CONFIG_VALID:
proxy_config_client->OnProxyConfigUpdated(config);
break;
case net::ProxyConfigService::CONFIG_UNSET:
proxy_config_client->OnProxyConfigUpdated(
net::ProxyConfigWithAnnotation::CreateDirect());
break;
case net::ProxyConfigService::CONFIG_PENDING:
NOTREACHED();
}
}
}
void ProxyConfigMonitor::OnLazyProxyConfigPoll() {
proxy_config_service_->OnLazyPoll();
}
#if BUILDFLAG(ENABLE_EXTENSIONS)
void ProxyConfigMonitor::OnPACScriptError(int32_t line_number,
const std::string& details) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
extensions::ProxyEventRouter::GetInstance()->OnPACScriptError(
profile_, line_number, base::UTF8ToUTF16(details));
}
void ProxyConfigMonitor::OnRequestMaybeFailedDueToProxySettings(
int32_t net_error) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
!BrowserThread::IsThreadInitialized(BrowserThread::UI));
if (net_error >= 0) {
// If the error is obviously wrong, don't dispatch it to extensions. If the
// PAC executor process is compromised, then |net_error| could be attacker
// controlled.
return;
}
extensions::ProxyEventRouter::GetInstance()->OnProxyError(profile_,
net_error);
}
#endif
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