blob: f80b9ce59c51fad8e3c7ff0a2afa9ec6a281bfc5 [file] [log] [blame]
// 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 "net/base/address_list.h"
#include "net/base/net_errors.h"
#include "net/base/network_interfaces.h"
#include "net/dns/host_resolver.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 set_iter(std::list<Job>::iterator iter) { iter_ = iter; }
void Start();
private:
// Completion callback for the HostResolver::Resolve request.
void OnResolveDone(int result);
// Mojo error handler.
void OnConnectionError();
MojoHostResolverImpl* resolver_service_;
// This Job's iterator in |resolver_service_|, so the Job may be removed on
// completion.
std::list<Job>::iterator iter_;
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_CALLED_ON_VALID_THREAD(thread_checker_);
}
void MojoHostResolverImpl::Resolve(
std::unique_ptr<HostResolver::RequestInfo> request_info,
interfaces::HostResolverRequestClientPtr client) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
if (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.
request_info->set_host_port_pair(HostPortPair(GetHostName(), 80));
}
pending_jobs_.emplace_front(this, resolver_, *request_info, net_log_,
std::move(client));
auto job = pending_jobs_.begin();
job->set_iter(job);
job->Start();
}
void MojoHostResolverImpl::DeleteJob(std::list<Job>::iterator job) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
pending_jobs_.erase(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() {
// The caller is responsible for setting up |iter_|.
DCHECK_EQ(this, &*iter_);
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() = default;
void MojoHostResolverImpl::Job::OnResolveDone(int result) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
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();
}
client_->ReportResult(result, result_);
resolver_service_->DeleteJob(iter_);
}
void MojoHostResolverImpl::Job::OnConnectionError() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
// |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(iter_);
}
} // namespace net