1 // Copyright 2017 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "net/nqe/network_quality_estimator_util.h"
6
7 #include <memory>
8
9 #include "base/check_op.h"
10 #include "base/functional/bind.h"
11 #include "base/notreached.h"
12 #include "net/base/address_list.h"
13 #include "net/base/ip_address.h"
14 #include "net/base/ip_endpoint.h"
15 #include "net/base/net_errors.h"
16 #include "net/dns/host_resolver.h"
17 #include "net/dns/public/host_resolver_source.h"
18 #include "net/url_request/url_request.h"
19 #include "net/url_request/url_request_context.h"
20 #include "url/scheme_host_port.h"
21
22 namespace net::nqe {
23
24 namespace {
25
IsPrivateHost(HostResolver * host_resolver,url::SchemeHostPort scheme_host_port,const NetworkAnonymizationKey & network_anonymization_key,NetLogWithSource net_log)26 bool IsPrivateHost(HostResolver* host_resolver,
27 url::SchemeHostPort scheme_host_port,
28 const NetworkAnonymizationKey& network_anonymization_key,
29 NetLogWithSource net_log) {
30 // Try resolving |host_port_pair.host()| synchronously.
31 HostResolver::ResolveHostParameters parameters;
32 parameters.source = HostResolverSource::LOCAL_ONLY;
33 std::unique_ptr<HostResolver::ResolveHostRequest> request =
34 host_resolver->CreateRequest(std::move(scheme_host_port),
35 network_anonymization_key, net_log,
36 parameters);
37
38 int rv = request->Start(base::BindOnce([](int error) { NOTREACHED(); }));
39 DCHECK_NE(rv, ERR_IO_PENDING);
40
41 if (rv == OK && request->GetAddressResults() &&
42 !request->GetAddressResults()->empty()) {
43 // Checking only the first address should be sufficient.
44 IPEndPoint ip_endpoint = request->GetAddressResults()->front();
45 IPAddress ip_address = ip_endpoint.address();
46 if (!ip_address.IsPubliclyRoutable())
47 return true;
48 }
49
50 return false;
51 }
52
53 } // namespace
54
55 namespace internal {
56
IsRequestForPrivateHost(const URLRequest & request,NetLogWithSource net_log)57 bool IsRequestForPrivateHost(const URLRequest& request,
58 NetLogWithSource net_log) {
59 // Using the request's NetworkAnonymizationKey isn't necessary for privacy
60 // reasons, but is needed to maximize the chances of a cache hit.
61 return IsPrivateHost(
62 request.context()->host_resolver(), url::SchemeHostPort(request.url()),
63 request.isolation_info().network_anonymization_key(), net_log);
64 }
65
IsPrivateHostForTesting(HostResolver * host_resolver,url::SchemeHostPort scheme_host_port,const NetworkAnonymizationKey & network_anonymization_key)66 bool IsPrivateHostForTesting(
67 HostResolver* host_resolver,
68 url::SchemeHostPort scheme_host_port,
69 const NetworkAnonymizationKey& network_anonymization_key) {
70 return IsPrivateHost(host_resolver, std::move(scheme_host_port),
71 network_anonymization_key, NetLogWithSource());
72 }
73
74 } // namespace internal
75
76 } // namespace net::nqe
77