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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/pepper/pepper_network_proxy_host.h"
#include "base/functional/bind.h"
#include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
#include "content/browser/renderer_host/pepper/pepper_proxy_lookup_helper.h"
#include "content/browser/renderer_host/pepper/pepper_socket_utils.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/site_instance.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/common/socket_permission_request.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "net/base/network_isolation_key.h"
#include "net/proxy_resolution/proxy_info.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/host/dispatch_host_message.h"
#include "ppapi/host/ppapi_host.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "services/network/public/mojom/network_context.mojom.h"
#include "services/network/public/mojom/proxy_lookup_client.mojom.h"
namespace content {
namespace {
bool LookUpProxyForURLCallback(
int render_process_host_id,
int render_frame_host_id,
const GURL& url,
mojo::PendingRemote<network::mojom::ProxyLookupClient>
proxy_lookup_client) {
RenderFrameHost* render_frame_host =
RenderFrameHost::FromID(render_process_host_id, render_frame_host_id);
if (!render_frame_host)
return false;
SiteInstance* site_instance = render_frame_host->GetSiteInstance();
StoragePartition* storage_partition =
site_instance->GetBrowserContext()->GetStoragePartition(site_instance);
storage_partition->GetNetworkContext()->LookUpProxyForURL(
url,
render_frame_host->GetIsolationInfoForSubresources()
.network_anonymization_key(),
std::move(proxy_lookup_client));
return true;
}
} // namespace
PepperNetworkProxyHost::PepperNetworkProxyHost(BrowserPpapiHostImpl* host,
PP_Instance instance,
PP_Resource resource)
: ResourceHost(host->GetPpapiHost(), instance, resource),
render_process_id_(0),
render_frame_id_(0),
is_allowed_(false),
waiting_for_ui_thread_data_(true) {
host->GetRenderFrameIDsForInstance(instance, &render_process_id_,
&render_frame_id_);
GetUIThreadTaskRunner({})->PostTaskAndReplyWithResult(
FROM_HERE,
base::BindOnce(&GetUIThreadDataOnUIThread, render_process_id_,
render_frame_id_, host->external_plugin()),
base::BindOnce(&PepperNetworkProxyHost::DidGetUIThreadData,
weak_factory_.GetWeakPtr()));
}
PepperNetworkProxyHost::~PepperNetworkProxyHost() = default;
PepperNetworkProxyHost::UIThreadData::UIThreadData() : is_allowed(false) {}
PepperNetworkProxyHost::UIThreadData::UIThreadData(const UIThreadData& other) =
default;
PepperNetworkProxyHost::UIThreadData::~UIThreadData() {}
// static
PepperNetworkProxyHost::UIThreadData
PepperNetworkProxyHost::GetUIThreadDataOnUIThread(int render_process_id,
int render_frame_id,
bool is_external_plugin) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
PepperNetworkProxyHost::UIThreadData result;
SocketPermissionRequest request(
content::SocketPermissionRequest::RESOLVE_PROXY, std::string(), 0);
result.is_allowed =
pepper_socket_utils::CanUseSocketAPIs(is_external_plugin,
false /* is_private_api */,
&request,
render_process_id,
render_frame_id);
return result;
}
void PepperNetworkProxyHost::DidGetUIThreadData(
const UIThreadData& ui_thread_data) {
is_allowed_ = ui_thread_data.is_allowed;
waiting_for_ui_thread_data_ = false;
TryToSendUnsentRequests();
}
int32_t PepperNetworkProxyHost::OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) {
PPAPI_BEGIN_MESSAGE_MAP(PepperNetworkProxyHost, msg)
PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_NetworkProxy_GetProxyForURL,
OnMsgGetProxyForURL)
PPAPI_END_MESSAGE_MAP()
return PP_ERROR_FAILED;
}
int32_t PepperNetworkProxyHost::OnMsgGetProxyForURL(
ppapi::host::HostMessageContext* context,
const std::string& url) {
GURL gurl(url);
if (gurl.is_valid()) {
UnsentRequest request = {gurl, context->MakeReplyMessageContext()};
unsent_requests_.push(request);
TryToSendUnsentRequests();
} else {
SendFailureReply(PP_ERROR_BADARGUMENT, context->MakeReplyMessageContext());
}
return PP_OK_COMPLETIONPENDING;
}
void PepperNetworkProxyHost::TryToSendUnsentRequests() {
if (waiting_for_ui_thread_data_)
return;
while (!unsent_requests_.empty()) {
const UnsentRequest& request = unsent_requests_.front();
if (!is_allowed_) {
SendFailureReply(PP_ERROR_NOACCESS, request.reply_context);
} else {
// Everything looks valid, so try to resolve the proxy.
auto lookup_helper = std::make_unique<PepperProxyLookupHelper>();
PepperProxyLookupHelper::LookUpProxyForURLCallback
look_up_proxy_for_url_callback = base::BindOnce(
&LookUpProxyForURLCallback, render_process_id_, render_frame_id_);
PepperProxyLookupHelper::LookUpCompleteCallback
look_up_complete_callback =
base::BindOnce(&PepperNetworkProxyHost::OnResolveProxyCompleted,
weak_factory_.GetWeakPtr(), request.reply_context,
lookup_helper.get());
lookup_helper->Start(request.url,
std::move(look_up_proxy_for_url_callback),
std::move(look_up_complete_callback));
pending_requests_.insert(std::move(lookup_helper));
}
unsent_requests_.pop();
}
}
void PepperNetworkProxyHost::OnResolveProxyCompleted(
ppapi::host::ReplyMessageContext context,
PepperProxyLookupHelper* pending_request,
std::optional<net::ProxyInfo> proxy_info) {
auto it = pending_requests_.find(pending_request);
CHECK(it != pending_requests_.end());
pending_requests_.erase(it);
std::string pac_string;
if (!proxy_info) {
// This can happen in cases of network service crash, shutdown, or when
// the request fails with ERR_MANDATORY_PROXY_CONFIGURATION_FAILED. There's
// really no action a plugin can take, so there's no need to distinguish
// which error occurred.
context.params.set_result(PP_ERROR_FAILED);
} else if (proxy_info->ContainsMultiProxyChain()) {
// Multi-proxy chains cannot be represented as a PAC string.
context.params.set_result(PP_ERROR_FAILED);
} else {
pac_string = proxy_info->ToPacString();
}
host()->SendReply(
context, PpapiPluginMsg_NetworkProxy_GetProxyForURLReply(pac_string));
}
void PepperNetworkProxyHost::SendFailureReply(
int32_t error,
ppapi::host::ReplyMessageContext context) {
context.params.set_result(error);
host()->SendReply(
context, PpapiPluginMsg_NetworkProxy_GetProxyForURLReply(std::string()));
}
} // namespace content
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