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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/api/dns/dns_api.h"
#include "base/functional/bind.h"
#include "base/values.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/storage_partition.h"
#include "extensions/common/api/dns.h"
#include "net/base/host_port_pair.h"
#include "net/base/net_errors.h"
#include "net/base/network_isolation_key.h"
#include "net/dns/public/resolve_error_info.h"
#include "url/origin.h"
using content::BrowserThread;
using extensions::api::dns::ResolveCallbackResolveInfo;
namespace Resolve = extensions::api::dns::Resolve;
namespace extensions {
DnsResolveFunction::DnsResolveFunction() = default;
DnsResolveFunction::~DnsResolveFunction() = default;
ExtensionFunction::ResponseAction DnsResolveFunction::Run() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::optional<Resolve::Params> params = Resolve::Params::Create(args());
EXTENSION_FUNCTION_VALIDATE(params);
// Intentionally pass host only (no scheme or non-zero port) to only get a
// basic resolution for the hostname itself.
net::HostPortPair host_port_pair(params->hostname, 0);
net::SchemefulSite site = net::SchemefulSite(extension_->origin());
browser_context()
->GetDefaultStoragePartition()
->GetNetworkContext()
->ResolveHost(network::mojom::HostResolverHost::NewHostPortPair(
std::move(host_port_pair)),
net::NetworkAnonymizationKey::CreateSameSite(site), nullptr,
receiver_.BindNewPipeAndPassRemote());
receiver_.set_disconnect_handler(base::BindOnce(
&DnsResolveFunction::OnComplete, base::Unretained(this),
net::ERR_NAME_NOT_RESOLVED, net::ResolveErrorInfo(net::ERR_FAILED),
/*resolved_addresses=*/std::nullopt,
/*endpoint_results_with_metadata=*/std::nullopt));
// Balanced in OnComplete().
AddRef();
return RespondLater();
}
void DnsResolveFunction::OnComplete(
int result,
const net::ResolveErrorInfo& resolve_error_info,
const std::optional<net::AddressList>& resolved_addresses,
const std::optional<net::HostResolverEndpointResults>&
endpoint_results_with_metadata) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
receiver_.reset();
ResolveCallbackResolveInfo resolve_info;
resolve_info.result_code = resolve_error_info.error;
if (result == net::OK) {
DCHECK(resolved_addresses.has_value() && !resolved_addresses->empty());
resolve_info.address = resolved_addresses->front().ToStringWithoutPort();
}
Respond(ArgumentList(Resolve::Results::Create(resolve_info)));
Release(); // Added in Run().
}
} // namespace extensions
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