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// Copyright 2012 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_socket_utils.h"
#include <string>
#include <vector>
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "build/build_config.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/site_instance.h"
#include "content/public/common/content_client.h"
#include "net/base/ip_address.h"
#include "net/base/ip_endpoint.h"
#include "ppapi/c/private/ppb_net_address_private.h"
#include "ppapi/shared_impl/private/net_address_private_impl.h"
namespace content::pepper_socket_utils {
SocketPermissionRequest CreateSocketPermissionRequest(
SocketPermissionRequest::OperationType type,
const PP_NetAddress_Private& net_addr) {
std::string host =
ppapi::NetAddressPrivateImpl::DescribeNetAddress(net_addr, false);
uint16_t port = 0;
net::IPAddressBytes address;
ppapi::NetAddressPrivateImpl::NetAddressToIPEndPoint(net_addr, &address,
&port);
return SocketPermissionRequest(type, host, port);
}
bool CanUseSocketAPIs(bool external_plugin,
bool private_api,
const SocketPermissionRequest* params,
int render_process_id,
int render_frame_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!external_plugin) {
// Always allow socket APIs for out-process plugins (other than external
// plugins instantiated by the embedder through
// BrowserPpapiHost::CreateExternalPluginProcess).
return true;
}
RenderFrameHost* render_frame_host =
RenderFrameHost::FromID(render_process_id, render_frame_id);
if (!render_frame_host) {
return false;
}
SiteInstance* site_instance = render_frame_host->GetSiteInstance();
if (!site_instance) {
return false;
}
if (!GetContentClient()->browser()->AllowPepperSocketAPI(
site_instance->GetBrowserContext(), site_instance->GetSiteURL(),
private_api, params)) {
LOG(ERROR) << "Host " << site_instance->GetSiteURL().host()
<< " cannot use socket API or destination is not allowed";
return false;
}
return true;
}
#if BUILDFLAG(IS_CHROMEOS)
namespace {
// The entire IPv4 subnet 127.0.0.0/8 is for loopback. See RFC3330.
const uint8_t kIPv4LocalhostPrefix[] = {127};
bool IsLoopbackAddress(const net::IPAddress& address) {
if (address.IsIPv4()) {
return net::IPAddressStartsWith(address, kIPv4LocalhostPrefix);
} else if (address.IsIPv6()) {
// ::1 is the only loopback address in ipv6.
return address == net::IPAddress::IPv6Localhost();
}
return false;
}
} // namespace
void OpenTCPFirewallHole(const net::IPEndPoint& address,
chromeos::FirewallHole::OpenCallback callback) {
if (IsLoopbackAddress(address.address())) {
std::move(callback).Run(nullptr);
return;
}
chromeos::FirewallHole::Open(chromeos::FirewallHole::PortType::kTcp,
address.port(), "" /*all interfaces*/,
std::move(callback));
}
void OpenUDPFirewallHole(const net::IPEndPoint& address,
chromeos::FirewallHole::OpenCallback callback) {
if (IsLoopbackAddress(address.address())) {
std::move(callback).Run(nullptr);
return;
}
chromeos::FirewallHole::Open(chromeos::FirewallHole::PortType::kUdp,
address.port(), "" /*all interfaces*/,
std::move(callback));
}
#endif // BUILDFLAG(IS_CHROMEOS)
net::MutableNetworkTrafficAnnotationTag PepperTCPNetworkAnnotationTag() {
return net::MutableNetworkTrafficAnnotationTag(
net::DefineNetworkTrafficAnnotation("pepper_tcp_socket",
R"(
semantics {
sender: "Pepper TCP Socket"
description:
"Pepper plugins use this API to send and receive data over the "
"network using TCP connections. This inteface is used by Flash and "
"PDF viewer, and Chrome Apps which use plugins to send/receive TCP "
"traffic (require Chrome Apps TCP socket permission). This "
"interface allows creation of client and server sockets."
trigger:
"A request from a Pepper plugin."
data: "Any data that the plugin sends."
destination: OTHER
destination_other:
"Data can be sent to any destination."
}
policy {
cookies_allowed: NO
setting:
"These requests cannot be disabled, but will not happen if user "
"does not use Flash, internal PDF Viewer, or Chrome Apps that use "
"Pepper interface."
chrome_policy {
DefaultPluginsSetting {
DefaultPluginsSetting: 2
}
}
chrome_policy {
AlwaysOpenPdfExternally {
AlwaysOpenPdfExternally: true
}
}
chrome_policy {
ExtensionInstallBlocklist {
ExtensionInstallBlocklist: {
entries: '*'
}
}
}
})"));
}
net::MutableNetworkTrafficAnnotationTag PepperUDPNetworkAnnotationTag() {
return net::MutableNetworkTrafficAnnotationTag(
net::DefineNetworkTrafficAnnotation("pepper_udp_socket",
R"(
semantics {
sender: "Pepper UDP Socket"
description:
"Pepper plugins use this API to send and receive data over the "
"network using UDP connections. This inteface is used by Flash and "
"PDF viewer, and Chrome Apps which use plugins to send/receive UDP "
"traffic (require Chrome Apps UDP socket permission)."
trigger:
"A request from a Pepper plugin."
data: "Any data that the plugin sends."
destination: OTHER
destination_other:
"Data can be sent to any destination."
}
policy {
cookies_allowed: NO
setting:
"These requests cannot be disabled, but will not happen if user "
"does not use Flash, internal PDF Viewer, or Chrome Apps that use "
"Pepper interface."
chrome_policy {
DefaultPluginsSetting {
DefaultPluginsSetting: 2
}
}
chrome_policy {
AlwaysOpenPdfExternally {
AlwaysOpenPdfExternally: true
}
}
chrome_policy {
ExtensionInstallBlocklist {
ExtensionInstallBlocklist: {
entries: '*'
}
}
}
})"));
}
} // namespace content::pepper_socket_utils
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