1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// Copyright 2015 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 "net/dns/mojo_host_resolver_impl.h"
#include <utility>
#include "base/stl_util.h"
#include "net/base/address_list.h"
#include "net/base/net_errors.h"
#include "net/base/network_interfaces.h"
#include "net/dns/host_resolver.h"
#include "net/dns/mojo_host_type_converters.h"
namespace net {
// Handles host resolution for a single request and sends a response when done.
// Also detects connection errors for HostResolverRequestClient and cancels the
// outstanding resolve request. Owned by MojoHostResolverImpl.
class MojoHostResolverImpl::Job {
public:
Job(MojoHostResolverImpl* resolver_service,
net::HostResolver* resolver,
const net::HostResolver::RequestInfo& request_info,
const NetLogWithSource& net_log,
interfaces::HostResolverRequestClientPtr client);
~Job();
void Start();
private:
// Completion callback for the HostResolver::Resolve request.
void OnResolveDone(int result);
// Mojo error handler.
void OnConnectionError();
MojoHostResolverImpl* resolver_service_;
net::HostResolver* resolver_;
net::HostResolver::RequestInfo request_info_;
const NetLogWithSource net_log_;
interfaces::HostResolverRequestClientPtr client_;
std::unique_ptr<net::HostResolver::Request> request_;
AddressList result_;
base::ThreadChecker thread_checker_;
};
MojoHostResolverImpl::MojoHostResolverImpl(net::HostResolver* resolver,
const NetLogWithSource& net_log)
: resolver_(resolver), net_log_(net_log) {}
MojoHostResolverImpl::~MojoHostResolverImpl() {
DCHECK(thread_checker_.CalledOnValidThread());
base::STLDeleteElements(&pending_jobs_);
}
void MojoHostResolverImpl::Resolve(
interfaces::HostResolverRequestInfoPtr request_info,
interfaces::HostResolverRequestClientPtr client) {
DCHECK(thread_checker_.CalledOnValidThread());
HostResolver::RequestInfo host_request_info =
request_info->To<net::HostResolver::RequestInfo>();
if (host_request_info.is_my_ip_address()) {
// The proxy resolver running inside a sandbox may not be able to get the
// correct host name. Instead, fill it ourself if the request is for our own
// IP address.
host_request_info.set_host_port_pair(HostPortPair(GetHostName(), 80));
}
Job* job = new Job(this, resolver_, host_request_info, net_log_,
std::move(client));
pending_jobs_.insert(job);
job->Start();
}
void MojoHostResolverImpl::DeleteJob(Job* job) {
DCHECK(thread_checker_.CalledOnValidThread());
size_t num_erased = pending_jobs_.erase(job);
DCHECK(num_erased);
delete job;
}
MojoHostResolverImpl::Job::Job(
MojoHostResolverImpl* resolver_service,
net::HostResolver* resolver,
const net::HostResolver::RequestInfo& request_info,
const NetLogWithSource& net_log,
interfaces::HostResolverRequestClientPtr client)
: resolver_service_(resolver_service),
resolver_(resolver),
request_info_(request_info),
net_log_(net_log),
client_(std::move(client)) {
client_.set_connection_error_handler(base::Bind(
&MojoHostResolverImpl::Job::OnConnectionError, base::Unretained(this)));
}
void MojoHostResolverImpl::Job::Start() {
DVLOG(1) << "Resolve " << request_info_.host_port_pair().ToString();
int result =
resolver_->Resolve(request_info_, DEFAULT_PRIORITY, &result_,
base::Bind(&MojoHostResolverImpl::Job::OnResolveDone,
base::Unretained(this)),
&request_, net_log_);
if (result != ERR_IO_PENDING)
OnResolveDone(result);
}
MojoHostResolverImpl::Job::~Job() {
}
void MojoHostResolverImpl::Job::OnResolveDone(int result) {
DCHECK(thread_checker_.CalledOnValidThread());
request_.reset();
DVLOG(1) << "Resolved " << request_info_.host_port_pair().ToString()
<< " with error " << result << " and " << result_.size()
<< " results!";
for (const auto& address : result_) {
DVLOG(1) << address.ToString();
}
if (result == OK)
client_->ReportResult(result, interfaces::AddressList::From(result_));
else
client_->ReportResult(result, nullptr);
resolver_service_->DeleteJob(this);
}
void MojoHostResolverImpl::Job::OnConnectionError() {
DCHECK(thread_checker_.CalledOnValidThread());
// |resolver_service_| should always outlive us.
DCHECK(resolver_service_);
DVLOG(1) << "Connection error on request for "
<< request_info_.host_port_pair().ToString();
resolver_service_->DeleteJob(this);
}
} // namespace net
|
