зеркало из https://github.com/mozilla/gecko-dev.git
364 строки
10 KiB
C++
364 строки
10 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=8 et tw=80 : */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/ContentChild.h"
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#include "mozilla/net/ChildDNSService.h"
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#include "mozilla/net/DNSRequestChild.h"
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#include "mozilla/net/NeckoChild.h"
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#include "mozilla/SystemGroup.h"
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#include "mozilla/Unused.h"
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#include "nsIDNSRecord.h"
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#include "nsIDNSByTypeRecord.h"
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#include "nsHostResolver.h"
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#include "nsTArray.h"
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#include "nsNetAddr.h"
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#include "nsIThread.h"
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#include "nsThreadUtils.h"
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using namespace mozilla::ipc;
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namespace mozilla {
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namespace net {
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//-----------------------------------------------------------------------------
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// ChildDNSRecord:
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// A simple class to provide nsIDNSRecord on the child
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//-----------------------------------------------------------------------------
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class ChildDNSRecord : public nsIDNSRecord {
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIDNSRECORD
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ChildDNSRecord(const DNSRecord& reply, uint16_t flags);
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private:
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virtual ~ChildDNSRecord() = default;
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nsCString mCanonicalName;
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nsTArray<NetAddr> mAddresses;
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uint32_t mCurrent; // addr iterator
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uint32_t mLength; // number of addrs
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uint16_t mFlags;
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};
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NS_IMPL_ISUPPORTS(ChildDNSRecord, nsIDNSRecord)
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ChildDNSRecord::ChildDNSRecord(const DNSRecord& reply, uint16_t flags)
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: mCurrent(0), mFlags(flags) {
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mCanonicalName = reply.canonicalName();
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// A shame IPDL gives us no way to grab ownership of array: so copy it.
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const nsTArray<NetAddr>& addrs = reply.addrs();
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uint32_t i = 0;
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mLength = addrs.Length();
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for (; i < mLength; i++) {
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mAddresses.AppendElement(addrs[i]);
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}
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}
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//-----------------------------------------------------------------------------
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// ChildDNSRecord::nsIDNSRecord
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//-----------------------------------------------------------------------------
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NS_IMETHODIMP
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ChildDNSRecord::GetCanonicalName(nsACString& result) {
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if (!(mFlags & nsHostResolver::RES_CANON_NAME)) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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result = mCanonicalName;
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return NS_OK;
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}
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NS_IMETHODIMP
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ChildDNSRecord::IsTRR(bool* retval) {
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*retval = false;
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return NS_ERROR_NOT_AVAILABLE;
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}
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NS_IMETHODIMP
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ChildDNSRecord::GetNextAddr(uint16_t port, NetAddr* addr) {
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if (mCurrent >= mLength) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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memcpy(addr, &mAddresses[mCurrent++], sizeof(NetAddr));
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// both Ipv4/6 use same bits for port, so safe to just use ipv4's field
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addr->inet.port = htons(port);
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return NS_OK;
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}
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NS_IMETHODIMP
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ChildDNSRecord::GetAddresses(nsTArray<NetAddr>& aAddressArray) {
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aAddressArray = mAddresses;
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return NS_OK;
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}
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// shamelessly copied from nsDNSRecord
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NS_IMETHODIMP
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ChildDNSRecord::GetScriptableNextAddr(uint16_t port, nsINetAddr** result) {
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NetAddr addr;
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nsresult rv = GetNextAddr(port, &addr);
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if (NS_FAILED(rv)) return rv;
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NS_ADDREF(*result = new nsNetAddr(&addr));
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return NS_OK;
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}
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// also copied from nsDNSRecord
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NS_IMETHODIMP
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ChildDNSRecord::GetNextAddrAsString(nsACString& result) {
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NetAddr addr;
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nsresult rv = GetNextAddr(0, &addr);
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if (NS_FAILED(rv)) {
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return rv;
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}
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char buf[kIPv6CStrBufSize];
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if (NetAddrToString(&addr, buf, sizeof(buf))) {
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result.Assign(buf);
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return NS_OK;
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}
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NS_ERROR("NetAddrToString failed unexpectedly");
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return NS_ERROR_FAILURE; // conversion failed for some reason
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}
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NS_IMETHODIMP
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ChildDNSRecord::HasMore(bool* result) {
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*result = mCurrent < mLength;
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return NS_OK;
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}
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NS_IMETHODIMP
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ChildDNSRecord::Rewind() {
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mCurrent = 0;
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return NS_OK;
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}
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NS_IMETHODIMP
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ChildDNSRecord::ReportUnusable(uint16_t aPort) {
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// "We thank you for your feedback" == >/dev/null
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// TODO: we could send info back to parent.
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return NS_OK;
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}
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class ChildDNSByTypeRecord : public nsIDNSByTypeRecord {
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIDNSBYTYPERECORD
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explicit ChildDNSByTypeRecord(const nsTArray<nsCString>& reply);
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private:
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virtual ~ChildDNSByTypeRecord() = default;
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nsTArray<nsCString> mRecords;
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};
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NS_IMPL_ISUPPORTS(ChildDNSByTypeRecord, nsIDNSByTypeRecord)
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ChildDNSByTypeRecord::ChildDNSByTypeRecord(const nsTArray<nsCString>& reply) {
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mRecords = reply;
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}
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NS_IMETHODIMP
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ChildDNSByTypeRecord::GetRecords(nsTArray<nsCString>& aRecords) {
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aRecords = mRecords;
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return NS_OK;
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}
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NS_IMETHODIMP
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ChildDNSByTypeRecord::GetRecordsAsOneString(nsACString& aRecords) {
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// deep copy
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for (uint32_t i = 0; i < mRecords.Length(); i++) {
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aRecords.Append(mRecords[i]);
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}
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return NS_OK;
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}
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//-----------------------------------------------------------------------------
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// CancelDNSRequestEvent
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//-----------------------------------------------------------------------------
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class CancelDNSRequestEvent : public Runnable {
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public:
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CancelDNSRequestEvent(DNSRequestChild* aDnsReq, nsresult aReason)
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: Runnable("net::CancelDNSRequestEvent"),
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mDnsRequest(aDnsReq),
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mReasonForCancel(aReason) {}
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NS_IMETHOD Run() override {
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if (mDnsRequest->mIPCOpen) {
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// Send request to Parent process.
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mDnsRequest->SendCancelDNSRequest(mDnsRequest->mHost, mDnsRequest->mType,
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mDnsRequest->mOriginAttributes,
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mDnsRequest->mFlags, mReasonForCancel);
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}
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return NS_OK;
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}
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private:
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RefPtr<DNSRequestChild> mDnsRequest;
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nsresult mReasonForCancel;
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};
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//-----------------------------------------------------------------------------
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// DNSRequestChild
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//-----------------------------------------------------------------------------
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DNSRequestChild::DNSRequestChild(const nsACString& aHost, const uint16_t& aType,
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const OriginAttributes& aOriginAttributes,
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const uint32_t& aFlags,
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nsIDNSListener* aListener,
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nsIEventTarget* target)
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: mListener(aListener),
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mTarget(target),
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mResultStatus(NS_OK),
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mHost(aHost),
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mType(aType),
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mOriginAttributes(aOriginAttributes),
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mFlags(aFlags),
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mIPCOpen(false) {}
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void DNSRequestChild::StartRequest() {
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// we can only do IPDL on the main thread
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if (!NS_IsMainThread()) {
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SystemGroup::Dispatch(
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TaskCategory::Other,
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NewRunnableMethod("net::DNSRequestChild::StartRequest", this,
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&DNSRequestChild::StartRequest));
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return;
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}
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nsCOMPtr<nsIEventTarget> systemGroupEventTarget =
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SystemGroup::EventTargetFor(TaskCategory::Other);
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gNeckoChild->SetEventTargetForActor(this, systemGroupEventTarget);
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mozilla::dom::ContentChild* cc =
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static_cast<mozilla::dom::ContentChild*>(gNeckoChild->Manager());
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if (cc->IsShuttingDown()) {
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return;
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}
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// Send request to Parent process.
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gNeckoChild->SendPDNSRequestConstructor(this, mHost, mOriginAttributes,
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mFlags);
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mIPCOpen = true;
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// IPDL holds a reference until IPDL channel gets destroyed
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AddIPDLReference();
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}
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void DNSRequestChild::CallOnLookupComplete() {
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MOZ_ASSERT(mListener);
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mListener->OnLookupComplete(this, mResultRecord, mResultStatus);
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}
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void DNSRequestChild::CallOnLookupByTypeComplete() {
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MOZ_ASSERT(mListener);
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MOZ_ASSERT(mType != nsIDNSService::RESOLVE_TYPE_DEFAULT);
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mListener->OnLookupByTypeComplete(this, mResultByTypeRecords, mResultStatus);
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}
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mozilla::ipc::IPCResult DNSRequestChild::RecvLookupCompleted(
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const DNSRequestResponse& reply) {
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mIPCOpen = false;
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MOZ_ASSERT(mListener);
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switch (reply.type()) {
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case DNSRequestResponse::TDNSRecord: {
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mResultRecord = new ChildDNSRecord(reply.get_DNSRecord(), mFlags);
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break;
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}
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case DNSRequestResponse::Tnsresult: {
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mResultStatus = reply.get_nsresult();
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break;
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}
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case DNSRequestResponse::TArrayOfnsCString: {
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MOZ_ASSERT(mType != nsIDNSService::RESOLVE_TYPE_DEFAULT);
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mResultByTypeRecords =
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new ChildDNSByTypeRecord(reply.get_ArrayOfnsCString());
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break;
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}
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default:
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MOZ_ASSERT_UNREACHABLE("unknown type");
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return IPC_FAIL_NO_REASON(this);
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}
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MOZ_ASSERT(NS_IsMainThread());
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bool targetIsMain = false;
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if (!mTarget) {
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targetIsMain = true;
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} else {
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mTarget->IsOnCurrentThread(&targetIsMain);
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}
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if (targetIsMain) {
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if (mType == nsIDNSService::RESOLVE_TYPE_DEFAULT) {
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CallOnLookupComplete();
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} else {
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CallOnLookupByTypeComplete();
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}
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} else {
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if (mType == nsIDNSService::RESOLVE_TYPE_DEFAULT) {
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nsCOMPtr<nsIRunnable> event =
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NewRunnableMethod("net::DNSRequestChild::CallOnLookupComplete", this,
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&DNSRequestChild::CallOnLookupComplete);
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mTarget->Dispatch(event, NS_DISPATCH_NORMAL);
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} else {
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nsCOMPtr<nsIRunnable> event =
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NewRunnableMethod("net::DNSRequestChild::CallOnLookupByTypeComplete",
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this, &DNSRequestChild::CallOnLookupByTypeComplete);
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mTarget->Dispatch(event, NS_DISPATCH_NORMAL);
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}
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}
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Unused << Send__delete__(this);
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return IPC_OK();
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}
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void DNSRequestChild::ReleaseIPDLReference() {
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// Request is done or destroyed. Remove it from the hash table.
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RefPtr<ChildDNSService> dnsServiceChild =
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dont_AddRef(ChildDNSService::GetSingleton());
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dnsServiceChild->NotifyRequestDone(this);
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Release();
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}
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void DNSRequestChild::ActorDestroy(ActorDestroyReason why) { mIPCOpen = false; }
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//-----------------------------------------------------------------------------
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// DNSRequestChild::nsISupports
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//-----------------------------------------------------------------------------
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NS_IMPL_ISUPPORTS(DNSRequestChild, nsICancelable)
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//-----------------------------------------------------------------------------
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// DNSRequestChild::nsICancelable
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//-----------------------------------------------------------------------------
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NS_IMETHODIMP
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DNSRequestChild::Cancel(nsresult reason) {
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if (mIPCOpen) {
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// We can only do IPDL on the main thread
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nsCOMPtr<nsIRunnable> runnable = new CancelDNSRequestEvent(this, reason);
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SystemGroup::Dispatch(TaskCategory::Other, runnable.forget());
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}
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return NS_OK;
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}
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//------------------------------------------------------------------------------
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} // namespace net
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} // namespace mozilla
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