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gecko-dev/netwerk/base/nsSocketTransport2.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsSocketTransport2.h"
#include "mozilla/Attributes.h"
#include "mozilla/Telemetry.h"
#include "nsIOService.h"
#include "nsStreamUtils.h"
#include "nsNetSegmentUtils.h"
#include "nsNetAddr.h"
#include "nsTransportUtils.h"
#include "nsProxyInfo.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "plstr.h"
#include "prerr.h"
#include "NetworkActivityMonitor.h"
#include "NSSErrorsService.h"
#include "mozilla/dom/ToJSValue.h"
#include "mozilla/net/NeckoChild.h"
#include "nsThreadUtils.h"
#include "nsISocketProviderService.h"
#include "nsISocketProvider.h"
#include "nsISSLSocketControl.h"
#include "nsIPipe.h"
#include "nsIClassInfoImpl.h"
#include "nsURLHelper.h"
#include "nsIDNSService.h"
#include "nsIDNSRecord.h"
#include "nsICancelable.h"
#include "TCPFastOpenLayer.h"
#include <algorithm>
#include "nsPrintfCString.h"
#include "xpcpublic.h"
#if defined(XP_WIN)
#include "ShutdownLayer.h"
#endif
/* Following inclusions required for keepalive config not supported by NSPR. */
#include "private/pprio.h"
#if defined(XP_WIN)
#include <winsock2.h>
#include <mstcpip.h>
#elif defined(XP_UNIX)
#include <errno.h>
#include <netinet/tcp.h>
#endif
/* End keepalive config inclusions. */
#define SUCCESSFUL_CONNECTING_TO_IPV4_ADDRESS 0
#define UNSUCCESSFUL_CONNECTING_TO_IPV4_ADDRESS 1
#define SUCCESSFUL_CONNECTING_TO_IPV6_ADDRESS 2
#define UNSUCCESSFUL_CONNECTING_TO_IPV6_ADDRESS 3
//-----------------------------------------------------------------------------
static NS_DEFINE_CID(kSocketProviderServiceCID, NS_SOCKETPROVIDERSERVICE_CID);
static NS_DEFINE_CID(kDNSServiceCID, NS_DNSSERVICE_CID);
//-----------------------------------------------------------------------------
namespace mozilla {
namespace net {
class nsSocketEvent : public Runnable
{
public:
nsSocketEvent(nsSocketTransport *transport, uint32_t type,
nsresult status = NS_OK, nsISupports *param = nullptr)
: mTransport(transport)
, mType(type)
, mStatus(status)
, mParam(param)
{}
NS_IMETHOD Run() override
{
mTransport->OnSocketEvent(mType, mStatus, mParam);
return NS_OK;
}
private:
RefPtr<nsSocketTransport> mTransport;
uint32_t mType;
nsresult mStatus;
nsCOMPtr<nsISupports> mParam;
};
//-----------------------------------------------------------------------------
//#define TEST_CONNECT_ERRORS
#ifdef TEST_CONNECT_ERRORS
#include <stdlib.h>
static PRErrorCode RandomizeConnectError(PRErrorCode code)
{
//
// To test out these errors, load http://www.yahoo.com/. It should load
// correctly despite the random occurrence of these errors.
//
int n = rand();
if (n > RAND_MAX/2) {
struct {
PRErrorCode err_code;
const char *err_name;
}
errors[] = {
//
// These errors should be recoverable provided there is another
// IP address in mDNSRecord.
//
{ PR_CONNECT_REFUSED_ERROR, "PR_CONNECT_REFUSED_ERROR" },
{ PR_CONNECT_TIMEOUT_ERROR, "PR_CONNECT_TIMEOUT_ERROR" },
//
// This error will cause this socket transport to error out;
// however, if the consumer is HTTP, then the HTTP transaction
// should be restarted when this error occurs.
//
{ PR_CONNECT_RESET_ERROR, "PR_CONNECT_RESET_ERROR" },
};
n = n % (sizeof(errors)/sizeof(errors[0]));
code = errors[n].err_code;
SOCKET_LOG(("simulating NSPR error %d [%s]\n", code, errors[n].err_name));
}
return code;
}
#endif
//-----------------------------------------------------------------------------
nsresult
ErrorAccordingToNSPR(PRErrorCode errorCode)
{
nsresult rv = NS_ERROR_FAILURE;
switch (errorCode) {
case PR_WOULD_BLOCK_ERROR:
rv = NS_BASE_STREAM_WOULD_BLOCK;
break;
case PR_CONNECT_ABORTED_ERROR:
case PR_CONNECT_RESET_ERROR:
rv = NS_ERROR_NET_RESET;
break;
case PR_END_OF_FILE_ERROR: // XXX document this correlation
rv = NS_ERROR_NET_INTERRUPT;
break;
case PR_CONNECT_REFUSED_ERROR:
// We lump the following NSPR codes in with PR_CONNECT_REFUSED_ERROR. We
// could get better diagnostics by adding distinct XPCOM error codes for
// each of these, but there are a lot of places in Gecko that check
// specifically for NS_ERROR_CONNECTION_REFUSED, all of which would need to
// be checked.
case PR_NETWORK_UNREACHABLE_ERROR:
case PR_HOST_UNREACHABLE_ERROR:
case PR_ADDRESS_NOT_AVAILABLE_ERROR:
// Treat EACCES as a soft error since (at least on Linux) connect() returns
// EACCES when an IPv6 connection is blocked by a firewall. See bug 270784.
case PR_NO_ACCESS_RIGHTS_ERROR:
rv = NS_ERROR_CONNECTION_REFUSED;
break;
case PR_ADDRESS_NOT_SUPPORTED_ERROR:
rv = NS_ERROR_SOCKET_ADDRESS_NOT_SUPPORTED;
break;
case PR_IO_TIMEOUT_ERROR:
case PR_CONNECT_TIMEOUT_ERROR:
rv = NS_ERROR_NET_TIMEOUT;
break;
case PR_OUT_OF_MEMORY_ERROR:
// These really indicate that the descriptor table filled up, or that the
// kernel ran out of network buffers - but nobody really cares which part of
// the system ran out of memory.
case PR_PROC_DESC_TABLE_FULL_ERROR:
case PR_SYS_DESC_TABLE_FULL_ERROR:
case PR_INSUFFICIENT_RESOURCES_ERROR:
rv = NS_ERROR_OUT_OF_MEMORY;
break;
case PR_ADDRESS_IN_USE_ERROR:
rv = NS_ERROR_SOCKET_ADDRESS_IN_USE;
break;
// These filename-related errors can arise when using Unix-domain sockets.
case PR_FILE_NOT_FOUND_ERROR:
rv = NS_ERROR_FILE_NOT_FOUND;
break;
case PR_IS_DIRECTORY_ERROR:
rv = NS_ERROR_FILE_IS_DIRECTORY;
break;
case PR_LOOP_ERROR:
rv = NS_ERROR_FILE_UNRESOLVABLE_SYMLINK;
break;
case PR_NAME_TOO_LONG_ERROR:
rv = NS_ERROR_FILE_NAME_TOO_LONG;
break;
case PR_NO_DEVICE_SPACE_ERROR:
rv = NS_ERROR_FILE_NO_DEVICE_SPACE;
break;
case PR_NOT_DIRECTORY_ERROR:
rv = NS_ERROR_FILE_NOT_DIRECTORY;
break;
case PR_READ_ONLY_FILESYSTEM_ERROR:
rv = NS_ERROR_FILE_READ_ONLY;
break;
case PR_BAD_ADDRESS_ERROR:
rv = NS_ERROR_UNKNOWN_HOST;
break;
default:
if (psm::IsNSSErrorCode(errorCode)) {
rv = psm::GetXPCOMFromNSSError(errorCode);
}
break;
// NSPR's socket code can return these, but they're not worth breaking out
// into their own error codes, distinct from NS_ERROR_FAILURE:
//
// PR_BAD_DESCRIPTOR_ERROR
// PR_INVALID_ARGUMENT_ERROR
// PR_NOT_SOCKET_ERROR
// PR_NOT_TCP_SOCKET_ERROR
// These would indicate a bug internal to the component.
//
// PR_PROTOCOL_NOT_SUPPORTED_ERROR
// This means that we can't use the given "protocol" (like
// IPPROTO_TCP or IPPROTO_UDP) with a socket of the given type. As
// above, this indicates an internal bug.
//
// PR_IS_CONNECTED_ERROR
// This indicates that we've applied a system call like 'bind' or
// 'connect' to a socket that is already connected. The socket
// components manage each file descriptor's state, and in some cases
// handle this error result internally. We shouldn't be returning
// this to our callers.
//
// PR_IO_ERROR
// This is so vague that NS_ERROR_FAILURE is just as good.
}
SOCKET_LOG(("ErrorAccordingToNSPR [in=%d out=%" PRIx32 "]\n", errorCode,
static_cast<uint32_t>(rv)));
return rv;
}
//-----------------------------------------------------------------------------
// socket input stream impl
//-----------------------------------------------------------------------------
nsSocketInputStream::nsSocketInputStream(nsSocketTransport *trans)
: mTransport(trans)
, mReaderRefCnt(0)
, mCondition(NS_OK)
, mCallbackFlags(0)
, mByteCount(0)
{
}
nsSocketInputStream::~nsSocketInputStream()
{
}
// called on the socket transport thread...
//
// condition : failure code if socket has been closed
//
void
nsSocketInputStream::OnSocketReady(nsresult condition)
{
SOCKET_LOG(("nsSocketInputStream::OnSocketReady [this=%p cond=%" PRIx32 "]\n",
this, static_cast<uint32_t>(condition)));
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
nsCOMPtr<nsIInputStreamCallback> callback;
{
MutexAutoLock lock(mTransport->mLock);
// update condition, but be careful not to erase an already
// existing error condition.
if (NS_SUCCEEDED(mCondition))
mCondition = condition;
// ignore event if only waiting for closure and not closed.
if (NS_FAILED(mCondition) || !(mCallbackFlags & WAIT_CLOSURE_ONLY)) {
callback = mCallback;
mCallback = nullptr;
mCallbackFlags = 0;
}
}
if (callback)
callback->OnInputStreamReady(this);
}
NS_IMPL_QUERY_INTERFACE(nsSocketInputStream,
nsIInputStream,
nsIAsyncInputStream)
NS_IMETHODIMP_(MozExternalRefCountType)
nsSocketInputStream::AddRef()
{
++mReaderRefCnt;
return mTransport->AddRef();
}
NS_IMETHODIMP_(MozExternalRefCountType)
nsSocketInputStream::Release()
{
if (--mReaderRefCnt == 0)
Close();
return mTransport->Release();
}
NS_IMETHODIMP
nsSocketInputStream::Close()
{
return CloseWithStatus(NS_BASE_STREAM_CLOSED);
}
NS_IMETHODIMP
nsSocketInputStream::Available(uint64_t *avail)
{
SOCKET_LOG(("nsSocketInputStream::Available [this=%p]\n", this));
*avail = 0;
PRFileDesc *fd;
{
MutexAutoLock lock(mTransport->mLock);
if (NS_FAILED(mCondition))
return mCondition;
fd = mTransport->GetFD_Locked();
if (!fd)
return NS_OK;
}
// cannot hold lock while calling NSPR. (worried about the fact that PSM
// synchronously proxies notifications over to the UI thread, which could
// mistakenly try to re-enter this code.)
int32_t n = PR_Available(fd);
// PSM does not implement PR_Available() so do a best approximation of it
// with MSG_PEEK
if ((n == -1) && (PR_GetError() == PR_NOT_IMPLEMENTED_ERROR)) {
char c;
n = PR_Recv(fd, &c, 1, PR_MSG_PEEK, 0);
SOCKET_LOG(("nsSocketInputStream::Available [this=%p] "
"using PEEK backup n=%d]\n", this, n));
}
nsresult rv;
{
MutexAutoLock lock(mTransport->mLock);
mTransport->ReleaseFD_Locked(fd);
if (n >= 0)
*avail = n;
else {
PRErrorCode code = PR_GetError();
if (code == PR_WOULD_BLOCK_ERROR)
return NS_OK;
mCondition = ErrorAccordingToNSPR(code);
}
rv = mCondition;
}
if (NS_FAILED(rv))
mTransport->OnInputClosed(rv);
return rv;
}
NS_IMETHODIMP
nsSocketInputStream::Read(char *buf, uint32_t count, uint32_t *countRead)
{
SOCKET_LOG(("nsSocketInputStream::Read [this=%p count=%u]\n", this, count));
*countRead = 0;
PRFileDesc* fd = nullptr;
{
MutexAutoLock lock(mTransport->mLock);
if (NS_FAILED(mCondition))
return (mCondition == NS_BASE_STREAM_CLOSED) ? NS_OK : mCondition;
fd = mTransport->GetFD_Locked();
if (!fd)
return NS_BASE_STREAM_WOULD_BLOCK;
}
SOCKET_LOG((" calling PR_Read [count=%u]\n", count));
// cannot hold lock while calling NSPR. (worried about the fact that PSM
// synchronously proxies notifications over to the UI thread, which could
// mistakenly try to re-enter this code.)
int32_t n = PR_Read(fd, buf, count);
SOCKET_LOG((" PR_Read returned [n=%d]\n", n));
nsresult rv = NS_OK;
{
MutexAutoLock lock(mTransport->mLock);
#ifdef ENABLE_SOCKET_TRACING
if (n > 0)
mTransport->TraceInBuf(buf, n);
#endif
mTransport->ReleaseFD_Locked(fd);
if (n > 0)
mByteCount += (*countRead = n);
else if (n < 0) {
PRErrorCode code = PR_GetError();
if (code == PR_WOULD_BLOCK_ERROR)
return NS_BASE_STREAM_WOULD_BLOCK;
mCondition = ErrorAccordingToNSPR(code);
}
rv = mCondition;
}
if (NS_FAILED(rv))
mTransport->OnInputClosed(rv);
// only send this notification if we have indeed read some data.
// see bug 196827 for an example of why this is important.
if (n > 0)
mTransport->SendStatus(NS_NET_STATUS_RECEIVING_FROM);
return rv;
}
NS_IMETHODIMP
nsSocketInputStream::ReadSegments(nsWriteSegmentFun writer, void *closure,
uint32_t count, uint32_t *countRead)
{
// socket stream is unbuffered
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsSocketInputStream::IsNonBlocking(bool *nonblocking)
{
*nonblocking = true;
return NS_OK;
}
NS_IMETHODIMP
nsSocketInputStream::CloseWithStatus(nsresult reason)
{
SOCKET_LOG(("nsSocketInputStream::CloseWithStatus [this=%p reason=%" PRIx32 "]\n", this,
static_cast<uint32_t>(reason)));
// may be called from any thread
nsresult rv;
{
MutexAutoLock lock(mTransport->mLock);
if (NS_SUCCEEDED(mCondition))
rv = mCondition = reason;
else
rv = NS_OK;
}
if (NS_FAILED(rv))
mTransport->OnInputClosed(rv);
return NS_OK;
}
NS_IMETHODIMP
nsSocketInputStream::AsyncWait(nsIInputStreamCallback *callback,
uint32_t flags,
uint32_t amount,
nsIEventTarget *target)
{
SOCKET_LOG(("nsSocketInputStream::AsyncWait [this=%p]\n", this));
bool hasError = false;
{
MutexAutoLock lock(mTransport->mLock);
if (callback && target) {
//
// build event proxy
//
mCallback = NS_NewInputStreamReadyEvent("nsSocketInputStream::AsyncWait",
callback, target);
}
else
mCallback = callback;
mCallbackFlags = flags;
hasError = NS_FAILED(mCondition);
} // unlock mTransport->mLock
if (hasError) {
// OnSocketEvent will call OnInputStreamReady with an error code after
// going through the event loop. We do this because most socket callers
// do not expect AsyncWait() to synchronously execute the OnInputStreamReady
// callback.
mTransport->PostEvent(nsSocketTransport::MSG_INPUT_PENDING);
} else {
mTransport->OnInputPending();
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// socket output stream impl
//-----------------------------------------------------------------------------
nsSocketOutputStream::nsSocketOutputStream(nsSocketTransport *trans)
: mTransport(trans)
, mWriterRefCnt(0)
, mCondition(NS_OK)
, mCallbackFlags(0)
, mByteCount(0)
{
}
nsSocketOutputStream::~nsSocketOutputStream()
{
}
// called on the socket transport thread...
//
// condition : failure code if socket has been closed
//
void
nsSocketOutputStream::OnSocketReady(nsresult condition)
{
SOCKET_LOG(("nsSocketOutputStream::OnSocketReady [this=%p cond=%" PRIx32 "]\n",
this, static_cast<uint32_t>(condition)));
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
nsCOMPtr<nsIOutputStreamCallback> callback;
{
MutexAutoLock lock(mTransport->mLock);
// update condition, but be careful not to erase an already
// existing error condition.
if (NS_SUCCEEDED(mCondition))
mCondition = condition;
// ignore event if only waiting for closure and not closed.
if (NS_FAILED(mCondition) || !(mCallbackFlags & WAIT_CLOSURE_ONLY)) {
callback = mCallback;
mCallback = nullptr;
mCallbackFlags = 0;
}
}
if (callback)
callback->OnOutputStreamReady(this);
}
NS_IMPL_QUERY_INTERFACE(nsSocketOutputStream,
nsIOutputStream,
nsIAsyncOutputStream)
NS_IMETHODIMP_(MozExternalRefCountType)
nsSocketOutputStream::AddRef()
{
++mWriterRefCnt;
return mTransport->AddRef();
}
NS_IMETHODIMP_(MozExternalRefCountType)
nsSocketOutputStream::Release()
{
if (--mWriterRefCnt == 0)
Close();
return mTransport->Release();
}
NS_IMETHODIMP
nsSocketOutputStream::Close()
{
return CloseWithStatus(NS_BASE_STREAM_CLOSED);
}
NS_IMETHODIMP
nsSocketOutputStream::Flush()
{
return NS_OK;
}
NS_IMETHODIMP
nsSocketOutputStream::Write(const char *buf, uint32_t count, uint32_t *countWritten)
{
SOCKET_LOG(("nsSocketOutputStream::Write [this=%p count=%u]\n", this, count));
*countWritten = 0;
// A write of 0 bytes can be used to force the initial SSL handshake, so do
// not reject that.
PRFileDesc* fd = nullptr;
bool fastOpenInProgress;
{
MutexAutoLock lock(mTransport->mLock);
if (NS_FAILED(mCondition))
return mCondition;
fd = mTransport->GetFD_LockedAlsoDuringFastOpen();
if (!fd)
return NS_BASE_STREAM_WOULD_BLOCK;
fastOpenInProgress = mTransport->FastOpenInProgress();
}
if (fastOpenInProgress) {
// If we are in the fast open phase, we should not write more data
// than TCPFastOpenLayer can accept. If we write more data, this data
// will be buffered in tls and we want to avoid that.
uint32_t availableSpace = TCPFastOpenGetBufferSizeLeft(fd);
count = (count > availableSpace) ? availableSpace : count;
if (!count) {
{
MutexAutoLock lock(mTransport->mLock);
mTransport->ReleaseFD_Locked(fd);
}
return NS_BASE_STREAM_WOULD_BLOCK;
}
}
SOCKET_LOG((" calling PR_Write [count=%u]\n", count));
// cannot hold lock while calling NSPR. (worried about the fact that PSM
// synchronously proxies notifications over to the UI thread, which could
// mistakenly try to re-enter this code.)
int32_t n = PR_Write(fd, buf, count);
SOCKET_LOG((" PR_Write returned [n=%d]\n", n));
nsresult rv = NS_OK;
{
MutexAutoLock lock(mTransport->mLock);
#ifdef ENABLE_SOCKET_TRACING
if (n > 0)
mTransport->TraceOutBuf(buf, n);
#endif
mTransport->ReleaseFD_Locked(fd);
if (n > 0)
mByteCount += (*countWritten = n);
else if (n < 0) {
PRErrorCode code = PR_GetError();
if (code == PR_WOULD_BLOCK_ERROR)
return NS_BASE_STREAM_WOULD_BLOCK;
mCondition = ErrorAccordingToNSPR(code);
}
rv = mCondition;
}
if (NS_FAILED(rv))
mTransport->OnOutputClosed(rv);
// only send this notification if we have indeed written some data.
// see bug 196827 for an example of why this is important.
// During a fast open we are actually not sending data, the data will be
// only buffered in the TCPFastOpenLayer. Therefore we will call
// SendStatus(NS_NET_STATUS_SENDING_TO) when we really send data (i.e. when
// TCPFastOpenFinish is called.
if ((n > 0) && !fastOpenInProgress) {
mTransport->SendStatus(NS_NET_STATUS_SENDING_TO);
}
return rv;
}
NS_IMETHODIMP
nsSocketOutputStream::WriteSegments(nsReadSegmentFun reader, void *closure,
uint32_t count, uint32_t *countRead)
{
// socket stream is unbuffered
return NS_ERROR_NOT_IMPLEMENTED;
}
nsresult
nsSocketOutputStream::WriteFromSegments(nsIInputStream *input,
void *closure,
const char *fromSegment,
uint32_t offset,
uint32_t count,
uint32_t *countRead)
{
nsSocketOutputStream *self = (nsSocketOutputStream *) closure;
return self->Write(fromSegment, count, countRead);
}
NS_IMETHODIMP
nsSocketOutputStream::WriteFrom(nsIInputStream *stream, uint32_t count, uint32_t *countRead)
{
return stream->ReadSegments(WriteFromSegments, this, count, countRead);
}
NS_IMETHODIMP
nsSocketOutputStream::IsNonBlocking(bool *nonblocking)
{
*nonblocking = true;
return NS_OK;
}
NS_IMETHODIMP
nsSocketOutputStream::CloseWithStatus(nsresult reason)
{
SOCKET_LOG(("nsSocketOutputStream::CloseWithStatus [this=%p reason=%" PRIx32 "]\n", this,
static_cast<uint32_t>(reason)));
// may be called from any thread
nsresult rv;
{
MutexAutoLock lock(mTransport->mLock);
if (NS_SUCCEEDED(mCondition))
rv = mCondition = reason;
else
rv = NS_OK;
}
if (NS_FAILED(rv))
mTransport->OnOutputClosed(rv);
return NS_OK;
}
NS_IMETHODIMP
nsSocketOutputStream::AsyncWait(nsIOutputStreamCallback *callback,
uint32_t flags,
uint32_t amount,
nsIEventTarget *target)
{
SOCKET_LOG(("nsSocketOutputStream::AsyncWait [this=%p]\n", this));
{
MutexAutoLock lock(mTransport->mLock);
if (callback && target) {
//
// build event proxy
//
mCallback = NS_NewOutputStreamReadyEvent(callback, target);
}
else
mCallback = callback;
mCallbackFlags = flags;
}
mTransport->OnOutputPending();
return NS_OK;
}
//-----------------------------------------------------------------------------
// socket transport impl
//-----------------------------------------------------------------------------
nsSocketTransport::nsSocketTransport()
: mTypes(nullptr)
, mTypeCount(0)
, mPort(0)
, mProxyPort(0)
, mOriginPort(0)
, mProxyTransparent(false)
, mProxyTransparentResolvesHost(false)
, mHttpsProxy(false)
, mConnectionFlags(0)
, mReuseAddrPort(false)
, mState(STATE_CLOSED)
, mAttached(false)
, mInputClosed(true)
, mOutputClosed(true)
, mResolving(false)
, mNetAddrIsSet(false)
, mSelfAddrIsSet(false)
, mNetAddrPreResolved(false)
, mLock("nsSocketTransport.mLock")
, mFD(this)
, mFDref(0)
, mFDconnected(false)
, mFDFastOpenInProgress(false)
, mSocketTransportService(gSocketTransportService)
, mInput(this)
, mOutput(this)
, mQoSBits(0x00)
, mKeepaliveEnabled(false)
, mKeepaliveIdleTimeS(-1)
, mKeepaliveRetryIntervalS(-1)
, mKeepaliveProbeCount(-1)
, mFastOpenCallback(nullptr)
, mFastOpenLayerHasBufferedData(false)
, mDoNotRetryToConnect(false)
{
SOCKET_LOG(("creating nsSocketTransport @%p\n", this));
mTimeouts[TIMEOUT_CONNECT] = UINT16_MAX; // no timeout
mTimeouts[TIMEOUT_READ_WRITE] = UINT16_MAX; // no timeout
}
nsSocketTransport::~nsSocketTransport()
{
SOCKET_LOG(("destroying nsSocketTransport @%p\n", this));
CleanupTypes();
}
void
nsSocketTransport::CleanupTypes()
{
// cleanup socket type info
if (mTypes) {
for (uint32_t i = 0; i < mTypeCount; ++i) {
PL_strfree(mTypes[i]);
}
free(mTypes);
mTypes = nullptr;
}
mTypeCount = 0;
}
nsresult
nsSocketTransport::Init(const char **types, uint32_t typeCount,
const nsACString &host, uint16_t port,
const nsACString &hostRoute, uint16_t portRoute,
nsIProxyInfo *givenProxyInfo)
{
nsCOMPtr<nsProxyInfo> proxyInfo;
if (givenProxyInfo) {
proxyInfo = do_QueryInterface(givenProxyInfo);
NS_ENSURE_ARG(proxyInfo);
}
// init socket type info
mOriginHost = host;
mOriginPort = port;
if (!hostRoute.IsEmpty()) {
mHost = hostRoute;
mPort = portRoute;
} else {
mHost = host;
mPort = port;
}
if (proxyInfo) {
mHttpsProxy = proxyInfo->IsHTTPS();
}
const char *proxyType = nullptr;
mProxyInfo = proxyInfo;
if (proxyInfo) {
mProxyPort = proxyInfo->Port();
mProxyHost = proxyInfo->Host();
// grab proxy type (looking for "socks" for example)
proxyType = proxyInfo->Type();
if (proxyType && (proxyInfo->IsHTTP() ||
proxyInfo->IsHTTPS() ||
proxyInfo->IsDirect() ||
!strcmp(proxyType, "unknown"))) {
proxyType = nullptr;
}
}
SOCKET_LOG(("nsSocketTransport::Init [this=%p host=%s:%hu origin=%s:%d proxy=%s:%hu]\n",
this, mHost.get(), mPort, mOriginHost.get(), mOriginPort,
mProxyHost.get(), mProxyPort));
// include proxy type as a socket type if proxy type is not "http"
mTypeCount = typeCount + (proxyType != nullptr);
if (!mTypeCount)
return NS_OK;
// if we have socket types, then the socket provider service had
// better exist!
nsresult rv;
nsCOMPtr<nsISocketProviderService> spserv =
do_GetService(kSocketProviderServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
mTypes = (char **) malloc(mTypeCount * sizeof(char *));
if (!mTypes)
return NS_ERROR_OUT_OF_MEMORY;
// now verify that each socket type has a registered socket provider.
for (uint32_t i = 0, type = 0; i < mTypeCount; ++i) {
// store socket types
if (i == 0 && proxyType)
mTypes[i] = PL_strdup(proxyType);
else
mTypes[i] = PL_strdup(types[type++]);
if (!mTypes[i]) {
mTypeCount = i;
return NS_ERROR_OUT_OF_MEMORY;
}
nsCOMPtr<nsISocketProvider> provider;
rv = spserv->GetSocketProvider(mTypes[i], getter_AddRefs(provider));
if (NS_FAILED(rv)) {
NS_WARNING("no registered socket provider");
return rv;
}
// note if socket type corresponds to a transparent proxy
// XXX don't hardcode SOCKS here (use proxy info's flags instead).
if ((strcmp(mTypes[i], "socks") == 0) ||
(strcmp(mTypes[i], "socks4") == 0)) {
mProxyTransparent = true;
if (proxyInfo->Flags() & nsIProxyInfo::TRANSPARENT_PROXY_RESOLVES_HOST) {
// we want the SOCKS layer to send the hostname
// and port to the proxy and let it do the DNS.
mProxyTransparentResolvesHost = true;
}
}
}
return NS_OK;
}
nsresult
nsSocketTransport::InitPreResolved(const char **socketTypes, uint32_t typeCount,
const nsACString &host, uint16_t port,
const nsACString &hostRoute, uint16_t portRoute,
nsIProxyInfo *proxyInfo,
const mozilla::net::NetAddr* addr)
{
nsresult rv = Init(socketTypes, typeCount, host, port, hostRoute, portRoute, proxyInfo);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mNetAddr = *addr;
mNetAddrPreResolved = true;
return NS_OK;
}
nsresult
nsSocketTransport::InitWithFilename(const char *filename)
{
#if defined(XP_UNIX)
size_t filenameLength = strlen(filename);
if (filenameLength > sizeof(mNetAddr.local.path) - 1)
return NS_ERROR_FILE_NAME_TOO_LONG;
mHost.Assign(filename);
mPort = 0;
mTypeCount = 0;
mNetAddr.local.family = AF_LOCAL;
memcpy(mNetAddr.local.path, filename, filenameLength);
mNetAddr.local.path[filenameLength] = '\0';
mNetAddrIsSet = true;
return NS_OK;
#else
return NS_ERROR_SOCKET_ADDRESS_NOT_SUPPORTED;
#endif
}
nsresult
nsSocketTransport::InitWithConnectedSocket(PRFileDesc *fd, const NetAddr *addr)
{
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
NS_ASSERTION(!mFD.IsInitialized(), "already initialized");
char buf[kNetAddrMaxCStrBufSize];
NetAddrToString(addr, buf, sizeof(buf));
mHost.Assign(buf);
uint16_t port;
if (addr->raw.family == AF_INET)
port = addr->inet.port;
else if (addr->raw.family == AF_INET6)
port = addr->inet6.port;
else
port = 0;
mPort = ntohs(port);
memcpy(&mNetAddr, addr, sizeof(NetAddr));
mPollFlags = (PR_POLL_READ | PR_POLL_WRITE | PR_POLL_EXCEPT);
mPollTimeout = mTimeouts[TIMEOUT_READ_WRITE];
mState = STATE_TRANSFERRING;
SetSocketName(fd);
mNetAddrIsSet = true;
{
MutexAutoLock lock(mLock);
mFD = fd;
mFDref = 1;
mFDconnected = 1;
}
// make sure new socket is non-blocking
PRSocketOptionData opt;
opt.option = PR_SockOpt_Nonblocking;
opt.value.non_blocking = true;
PR_SetSocketOption(fd, &opt);
SOCKET_LOG(("nsSocketTransport::InitWithConnectedSocket [this=%p addr=%s:%hu]\n",
this, mHost.get(), mPort));
// jump to InitiateSocket to get ourselves attached to the STS poll list.
return PostEvent(MSG_RETRY_INIT_SOCKET);
}
nsresult
nsSocketTransport::InitWithConnectedSocket(PRFileDesc* aFD,
const NetAddr* aAddr,
nsISupports* aSecInfo)
{
mSecInfo = aSecInfo;
return InitWithConnectedSocket(aFD, aAddr);
}
nsresult
nsSocketTransport::PostEvent(uint32_t type, nsresult status, nsISupports *param)
{
SOCKET_LOG(("nsSocketTransport::PostEvent [this=%p type=%u status=%" PRIx32 " param=%p]\n",
this, type, static_cast<uint32_t>(status), param));
nsCOMPtr<nsIRunnable> event = new nsSocketEvent(this, type, status, param);
if (!event)
return NS_ERROR_OUT_OF_MEMORY;
return mSocketTransportService->Dispatch(event, NS_DISPATCH_NORMAL);
}
void
nsSocketTransport::SendStatus(nsresult status)
{
SOCKET_LOG(("nsSocketTransport::SendStatus [this=%p status=%" PRIx32 "]\n", this,
static_cast<uint32_t>(status)));
nsCOMPtr<nsITransportEventSink> sink;
uint64_t progress;
{
MutexAutoLock lock(mLock);
sink = mEventSink;
switch (status) {
case NS_NET_STATUS_SENDING_TO:
progress = mOutput.ByteCount();
// If Fast Open is used, we buffer some data in TCPFastOpenLayer,
// This data can be only tls data or application data as well.
// socketTransport should send status only if it really has sent
// application data. socketTransport cannot query transaction for
// that info but it can know if transaction has send data if
// mOutput.ByteCount() is > 0.
if (progress == 0) {
return;
}
break;
case NS_NET_STATUS_RECEIVING_FROM:
progress = mInput.ByteCount();
break;
default:
progress = 0;
break;
}
}
if (sink) {
sink->OnTransportStatus(this, status, progress, -1);
}
}
nsresult
nsSocketTransport::ResolveHost()
{
SOCKET_LOG(("nsSocketTransport::ResolveHost [this=%p %s:%d%s]\n",
this, SocketHost().get(), SocketPort(),
mConnectionFlags & nsSocketTransport::BYPASS_CACHE ?
" bypass cache" : ""));
nsresult rv;
if (mNetAddrPreResolved) {
mState = STATE_RESOLVING;
return PostEvent(MSG_DNS_LOOKUP_COMPLETE, NS_OK, nullptr);
}
if (!mProxyHost.IsEmpty()) {
if (!mProxyTransparent || mProxyTransparentResolvesHost) {
#if defined(XP_UNIX)
MOZ_ASSERT(!mNetAddrIsSet || mNetAddr.raw.family != AF_LOCAL,
"Unix domain sockets can't be used with proxies");
#endif
// When not resolving mHost locally, we still want to ensure that
// it only contains valid characters. See bug 304904 for details.
// Sometimes the end host is not yet known and mHost is *
if (!net_IsValidHostName(mHost) &&
!mHost.Equals(NS_LITERAL_CSTRING("*"))) {
SOCKET_LOG((" invalid hostname %s\n", mHost.get()));
return NS_ERROR_UNKNOWN_HOST;
}
}
if (mProxyTransparentResolvesHost) {
// Name resolution is done on the server side. Just pretend
// client resolution is complete, this will get picked up later.
// since we don't need to do DNS now, we bypass the resolving
// step by initializing mNetAddr to an empty address, but we
// must keep the port. The SOCKS IO layer will use the hostname
// we send it when it's created, rather than the empty address
// we send with the connect call.
mState = STATE_RESOLVING;
mNetAddr.raw.family = AF_INET;
mNetAddr.inet.port = htons(SocketPort());
mNetAddr.inet.ip = htonl(INADDR_ANY);
return PostEvent(MSG_DNS_LOOKUP_COMPLETE, NS_OK, nullptr);
}
}
nsCOMPtr<nsIDNSService> dns = do_GetService(kDNSServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
mResolving = true;
uint32_t dnsFlags = 0;
if (mConnectionFlags & nsSocketTransport::BYPASS_CACHE)
dnsFlags = nsIDNSService::RESOLVE_BYPASS_CACHE;
if (mConnectionFlags & nsSocketTransport::DISABLE_IPV6)
dnsFlags |= nsIDNSService::RESOLVE_DISABLE_IPV6;
if (mConnectionFlags & nsSocketTransport::DISABLE_IPV4)
dnsFlags |= nsIDNSService::RESOLVE_DISABLE_IPV4;
NS_ASSERTION(!(dnsFlags & nsIDNSService::RESOLVE_DISABLE_IPV6) ||
!(dnsFlags & nsIDNSService::RESOLVE_DISABLE_IPV4),
"Setting both RESOLVE_DISABLE_IPV6 and RESOLVE_DISABLE_IPV4");
SendStatus(NS_NET_STATUS_RESOLVING_HOST);
if (!SocketHost().Equals(mOriginHost)) {
SOCKET_LOG(("nsSocketTransport %p origin %s doing dns for %s\n",
this, mOriginHost.get(), SocketHost().get()));
}
rv = dns->AsyncResolveExtendedNative(SocketHost(), dnsFlags, mNetworkInterfaceId,
this, nullptr, mOriginAttributes,
getter_AddRefs(mDNSRequest));
if (NS_SUCCEEDED(rv)) {
SOCKET_LOG((" advancing to STATE_RESOLVING\n"));
mState = STATE_RESOLVING;
}
return rv;
}
nsresult
nsSocketTransport::BuildSocket(PRFileDesc *&fd, bool &proxyTransparent, bool &usingSSL)
{
SOCKET_LOG(("nsSocketTransport::BuildSocket [this=%p]\n", this));
nsresult rv;
proxyTransparent = false;
usingSSL = false;
if (mTypeCount == 0) {
fd = PR_OpenTCPSocket(mNetAddr.raw.family);
rv = fd ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
else {
#if defined(XP_UNIX)
MOZ_ASSERT(!mNetAddrIsSet || mNetAddr.raw.family != AF_LOCAL,
"Unix domain sockets can't be used with socket types");
#endif
fd = nullptr;
nsCOMPtr<nsISocketProviderService> spserv =
do_GetService(kSocketProviderServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
// by setting host to mOriginHost, instead of mHost we send the
// SocketProvider (e.g. PSM) the origin hostname but can still do DNS
// on an explicit alternate service host name
const char *host = mOriginHost.get();
int32_t port = (int32_t) mOriginPort;
nsCOMPtr<nsIProxyInfo> proxyInfo = mProxyInfo;
uint32_t controlFlags = 0;
uint32_t i;
for (i=0; i<mTypeCount; ++i) {
nsCOMPtr<nsISocketProvider> provider;
SOCKET_LOG((" pushing io layer [%u:%s]\n", i, mTypes[i]));
rv = spserv->GetSocketProvider(mTypes[i], getter_AddRefs(provider));
if (NS_FAILED(rv))
break;
if (mProxyTransparentResolvesHost)
controlFlags |= nsISocketProvider::PROXY_RESOLVES_HOST;
if (mConnectionFlags & nsISocketTransport::ANONYMOUS_CONNECT)
controlFlags |= nsISocketProvider::ANONYMOUS_CONNECT;
if (mConnectionFlags & nsISocketTransport::NO_PERMANENT_STORAGE)
controlFlags |= nsISocketProvider::NO_PERMANENT_STORAGE;
if (mConnectionFlags & nsISocketTransport::MITM_OK)
controlFlags |= nsISocketProvider::MITM_OK;
if (mConnectionFlags & nsISocketTransport::BE_CONSERVATIVE)
controlFlags |= nsISocketProvider::BE_CONSERVATIVE;
nsCOMPtr<nsISupports> secinfo;
if (i == 0) {
// if this is the first type, we'll want the
// service to allocate a new socket
// when https proxying we want to just connect to the proxy as if
// it were the end host (i.e. expect the proxy's cert)
rv = provider->NewSocket(mNetAddr.raw.family,
mHttpsProxy ? mProxyHost.get() : host,
mHttpsProxy ? mProxyPort : port,
proxyInfo, mOriginAttributes,
controlFlags, &fd,
getter_AddRefs(secinfo));
if (NS_SUCCEEDED(rv) && !fd) {
NS_NOTREACHED("NewSocket succeeded but failed to create a PRFileDesc");
rv = NS_ERROR_UNEXPECTED;
}
}
else {
// the socket has already been allocated,
// so we just want the service to add itself
// to the stack (such as pushing an io layer)
rv = provider->AddToSocket(mNetAddr.raw.family,
host, port, proxyInfo,
mOriginAttributes, controlFlags, fd,
getter_AddRefs(secinfo));
}
// controlFlags = 0; not used below this point...
if (NS_FAILED(rv))
break;
// if the service was ssl or starttls, we want to hold onto the socket info
bool isSSL = (strcmp(mTypes[i], "ssl") == 0);
if (isSSL || (strcmp(mTypes[i], "starttls") == 0)) {
// remember security info and give notification callbacks to PSM...
nsCOMPtr<nsIInterfaceRequestor> callbacks;
{
MutexAutoLock lock(mLock);
mSecInfo = secinfo;
callbacks = mCallbacks;
SOCKET_LOG((" [secinfo=%p callbacks=%p]\n", mSecInfo.get(), mCallbacks.get()));
}
// don't call into PSM while holding mLock!!
nsCOMPtr<nsISSLSocketControl> secCtrl(do_QueryInterface(secinfo));
if (secCtrl)
secCtrl->SetNotificationCallbacks(callbacks);
// remember if socket type is SSL so we can ProxyStartSSL if need be.
usingSSL = isSSL;
}
else if ((strcmp(mTypes[i], "socks") == 0) ||
(strcmp(mTypes[i], "socks4") == 0)) {
// since socks is transparent, any layers above
// it do not have to worry about proxy stuff
proxyInfo = nullptr;
proxyTransparent = true;
}
}
if (NS_FAILED(rv)) {
SOCKET_LOG((" error pushing io layer [%u:%s rv=%" PRIx32 "]\n", i, mTypes[i],
static_cast<uint32_t>(rv)));
if (fd) {
CloseSocket(fd,
mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
}
}
}
return rv;
}
nsresult
nsSocketTransport::InitiateSocket()
{
SOCKET_LOG(("nsSocketTransport::InitiateSocket [this=%p]\n", this));
nsresult rv;
bool isLocal;
IsLocal(&isLocal);
if (gIOService->IsNetTearingDown()) {
return NS_ERROR_ABORT;
}
if (gIOService->IsOffline()) {
if (!isLocal)
return NS_ERROR_OFFLINE;
} else if (!isLocal) {
#ifdef DEBUG
// all IP networking has to be done from the parent
if (NS_SUCCEEDED(mCondition) &&
((mNetAddr.raw.family == AF_INET) || (mNetAddr.raw.family == AF_INET6))) {
MOZ_ASSERT(!IsNeckoChild());
}
#endif
if (NS_SUCCEEDED(mCondition) &&
xpc::AreNonLocalConnectionsDisabled() &&
!(IsIPAddrAny(&mNetAddr) || IsIPAddrLocal(&mNetAddr))) {
nsAutoCString ipaddr;
RefPtr<nsNetAddr> netaddr = new nsNetAddr(&mNetAddr);
netaddr->GetAddress(ipaddr);
fprintf_stderr(stderr,
"FATAL ERROR: Non-local network connections are disabled and a connection "
"attempt to %s (%s) was made.\nYou should only access hostnames "
"available via the test networking proxy (if running mochitests) "
"or from a test-specific httpd.js server (if running xpcshell tests). "
"Browser services should be disabled or redirected to a local server.\n",
mHost.get(), ipaddr.get());
MOZ_CRASH("Attempting to connect to non-local address!");
}
}
// Hosts/Proxy Hosts that are Local IP Literals should not be speculatively
// connected - Bug 853423.
if (mConnectionFlags & nsISocketTransport::DISABLE_RFC1918 &&
IsIPAddrLocal(&mNetAddr)) {
if (SOCKET_LOG_ENABLED()) {
nsAutoCString netAddrCString;
netAddrCString.SetCapacity(kIPv6CStrBufSize);
if (!NetAddrToString(&mNetAddr,
netAddrCString.BeginWriting(),
kIPv6CStrBufSize))
netAddrCString = NS_LITERAL_CSTRING("<IP-to-string failed>");
SOCKET_LOG(("nsSocketTransport::InitiateSocket skipping "
"speculative connection for host [%s:%d] proxy "
"[%s:%d] with Local IP address [%s]",
mHost.get(), mPort, mProxyHost.get(), mProxyPort,
netAddrCString.get()));
}
mCondition = NS_ERROR_CONNECTION_REFUSED;
OnSocketDetached(nullptr);
return mCondition;
}
//
// find out if it is going to be ok to attach another socket to the STS.
// if not then we have to wait for the STS to tell us that it is ok.
// the notification is asynchronous, which means that when we could be
// in a race to call AttachSocket once notified. for this reason, when
// we get notified, we just re-enter this function. as a result, we are
// sure to ask again before calling AttachSocket. in this way we deal
// with the race condition. though it isn't the most elegant solution,
// it is far simpler than trying to build a system that would guarantee
// FIFO ordering (which wouldn't even be that valuable IMO). see bug
// 194402 for more info.
//
if (!mSocketTransportService->CanAttachSocket()) {
nsCOMPtr<nsIRunnable> event =
new nsSocketEvent(this, MSG_RETRY_INIT_SOCKET);
if (!event)
return NS_ERROR_OUT_OF_MEMORY;
return mSocketTransportService->NotifyWhenCanAttachSocket(event);
}
//
// if we already have a connected socket, then just attach and return.
//
if (mFD.IsInitialized()) {
rv = mSocketTransportService->AttachSocket(mFD, this);
if (NS_SUCCEEDED(rv))
mAttached = true;
return rv;
}
//
// create new socket fd, push io layers, etc.
//
PRFileDesc *fd;
bool proxyTransparent;
bool usingSSL;
rv = BuildSocket(fd, proxyTransparent, usingSSL);
if (NS_FAILED(rv)) {
SOCKET_LOG((" BuildSocket failed [rv=%" PRIx32 "]\n", static_cast<uint32_t>(rv)));
return rv;
}
// Attach network activity monitor
NetworkActivityMonitor::AttachIOLayer(fd);
PRStatus status;
// Make the socket non-blocking...
PRSocketOptionData opt;
opt.option = PR_SockOpt_Nonblocking;
opt.value.non_blocking = true;
status = PR_SetSocketOption(fd, &opt);
NS_ASSERTION(status == PR_SUCCESS, "unable to make socket non-blocking");
if (mReuseAddrPort) {
SOCKET_LOG((" Setting port/addr reuse socket options\n"));
// Set ReuseAddr for TCP sockets to enable having several
// sockets bound to same local IP and port
PRSocketOptionData opt_reuseaddr;
opt_reuseaddr.option = PR_SockOpt_Reuseaddr;
opt_reuseaddr.value.reuse_addr = PR_TRUE;
status = PR_SetSocketOption(fd, &opt_reuseaddr);
if (status != PR_SUCCESS) {
SOCKET_LOG((" Couldn't set reuse addr socket option: %d\n",
status));
}
// And also set ReusePort for platforms supporting this socket option
PRSocketOptionData opt_reuseport;
opt_reuseport.option = PR_SockOpt_Reuseport;
opt_reuseport.value.reuse_port = PR_TRUE;
status = PR_SetSocketOption(fd, &opt_reuseport);
if (status != PR_SUCCESS
&& PR_GetError() != PR_OPERATION_NOT_SUPPORTED_ERROR) {
SOCKET_LOG((" Couldn't set reuse port socket option: %d\n",
status));
}
}
// disable the nagle algorithm - if we rely on it to coalesce writes into
// full packets the final packet of a multi segment POST/PUT or pipeline
// sequence is delayed a full rtt
opt.option = PR_SockOpt_NoDelay;
opt.value.no_delay = true;
PR_SetSocketOption(fd, &opt);
// if the network.tcp.sendbuffer preference is set, use it to size SO_SNDBUF
// The Windows default of 8KB is too small and as of vista sp1, autotuning
// only applies to receive window
int32_t sndBufferSize;
mSocketTransportService->GetSendBufferSize(&sndBufferSize);
if (sndBufferSize > 0) {
opt.option = PR_SockOpt_SendBufferSize;
opt.value.send_buffer_size = sndBufferSize;
PR_SetSocketOption(fd, &opt);
}
if (mQoSBits) {
opt.option = PR_SockOpt_IpTypeOfService;
opt.value.tos = mQoSBits;
PR_SetSocketOption(fd, &opt);
}
#if defined(XP_WIN)
// The linger is turned off by default. This is not a hard close, but
// closesocket should return immediately and operating system tries to send
// remaining data for certain, implementation specific, amount of time.
// https://msdn.microsoft.com/en-us/library/ms739165.aspx
//
// Turn the linger option on an set the interval to 0. This will cause hard
// close of the socket.
opt.option = PR_SockOpt_Linger;
opt.value.linger.polarity = 1;
opt.value.linger.linger = 0;
PR_SetSocketOption(fd, &opt);
#endif
// inform socket transport about this newly created socket...
rv = mSocketTransportService->AttachSocket(fd, this);
if (NS_FAILED(rv)) {
CloseSocket(fd,
mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
return rv;
}
mAttached = true;
// assign mFD so that we can properly handle OnSocketDetached before we've
// established a connection.
{
MutexAutoLock lock(mLock);
mFD = fd;
mFDref = 1;
mFDconnected = false;
}
SOCKET_LOG((" advancing to STATE_CONNECTING\n"));
mState = STATE_CONNECTING;
mPollTimeout = mTimeouts[TIMEOUT_CONNECT];
SendStatus(NS_NET_STATUS_CONNECTING_TO);
if (SOCKET_LOG_ENABLED()) {
char buf[kNetAddrMaxCStrBufSize];
NetAddrToString(&mNetAddr, buf, sizeof(buf));
SOCKET_LOG((" trying address: %s\n", buf));
}
//
// Initiate the connect() to the host...
//
PRNetAddr prAddr;
{
if (mBindAddr) {
MutexAutoLock lock(mLock);
NetAddrToPRNetAddr(mBindAddr.get(), &prAddr);
status = PR_Bind(fd, &prAddr);
if (status != PR_SUCCESS) {
return NS_ERROR_FAILURE;
}
mBindAddr = nullptr;
}
}
NetAddrToPRNetAddr(&mNetAddr, &prAddr);
#ifdef XP_WIN
// Find the real tcp socket and set non-blocking once again!
// Bug 1158189.
PRFileDesc *bottom = PR_GetIdentitiesLayer(fd, PR_NSPR_IO_LAYER);
if (bottom) {
PROsfd osfd = PR_FileDesc2NativeHandle(bottom);
u_long nonblocking = 1;
if (ioctlsocket(osfd, FIONBIO, &nonblocking) != 0) {
NS_WARNING("Socket could not be set non-blocking!");
return NS_ERROR_FAILURE;
}
}
#endif
// We use PRIntervalTime here because we need
// nsIOService::LastOfflineStateChange time and
// nsIOService::LastConectivityChange time to be atomic.
PRIntervalTime connectStarted = 0;
if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
connectStarted = PR_IntervalNow();
}
bool tfo = false;
if (mFastOpenCallback &&
mFastOpenCallback->FastOpenEnabled()) {
if (NS_SUCCEEDED(AttachTCPFastOpenIOLayer(fd))) {
tfo = true;
SOCKET_LOG(("nsSocketTransport::InitiateSocket TCP Fast Open "
"started [this=%p]\n", this));
}
}
bool connectCalled = true; // This is only needed for telemetry.
status = PR_Connect(fd, &prAddr, NS_SOCKET_CONNECT_TIMEOUT);
PRErrorCode code = PR_GetError();
if ((status == PR_SUCCESS) && tfo) {
{
MutexAutoLock lock(mLock);
mFDFastOpenInProgress = true;
}
SOCKET_LOG(("Using TCP Fast Open."));
rv = mFastOpenCallback->StartFastOpen();
if (NS_FAILED(rv)) {
if (NS_SUCCEEDED(mCondition)) {
mCondition = rv;
}
mFastOpenCallback = nullptr;
MutexAutoLock lock(mLock);
mFDFastOpenInProgress = false;
return rv;
}
status = PR_FAILURE;
connectCalled = false;
bool fastOpenNotSupported = false;
uint8_t tfoStatus = TFO_NOT_TRIED;
TCPFastOpenFinish(fd, code, fastOpenNotSupported, tfoStatus);
// If we have sent data, trigger a socket status event.
if (tfoStatus == TFO_DATA_SENT) {
SendStatus(NS_NET_STATUS_SENDING_TO);
}
// If we have still some data buffered this data must be flush before
// mOutput.OnSocketReady(NS_OK) is called in
// nsSocketTransport::OnSocketReady, partially to keep socket status
// event in order.
mFastOpenLayerHasBufferedData = TCPFastOpenGetCurrentBufferSize(fd);
mFastOpenCallback->SetFastOpenStatus(tfoStatus);
SOCKET_LOG(("called StartFastOpen - code=%d; fastOpen is %s "
"supported.\n", code,
fastOpenNotSupported ? "not" : ""));
SOCKET_LOG(("TFO status %d\n", tfoStatus));
if (fastOpenNotSupported) {
// When TCP_FastOpen is turned off on the local host
// SendTo will return PR_NOT_TCP_SOCKET_ERROR. This is only
// on Linux.
// If a windows version does not support Fast Open, the return value
// will be PR_NOT_IMPLEMENTED_ERROR. This is only for windows 10
// versions older than version 1607, because we do not have subverion
// to check, we need to call PR_SendTo to check if it is supported.
mFastOpenCallback->FastOpenNotSupported();
// FastOpenNotSupported will set Fast Open as not supported globally.
// For this connection we will pretend that we still use fast open,
// because of the fallback mechanism in case we need to restart the
// attached transaction.
connectCalled = true;
}
} else {
mFastOpenCallback = nullptr;
}
if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase() &&
connectStarted && connectCalled) {
SendPRBlockingTelemetry(connectStarted,
Telemetry::PRCONNECT_BLOCKING_TIME_NORMAL,
Telemetry::PRCONNECT_BLOCKING_TIME_SHUTDOWN,
Telemetry::PRCONNECT_BLOCKING_TIME_CONNECTIVITY_CHANGE,
Telemetry::PRCONNECT_BLOCKING_TIME_LINK_CHANGE,
Telemetry::PRCONNECT_BLOCKING_TIME_OFFLINE);
}
if (status == PR_SUCCESS) {
//
// we are connected!
//
OnSocketConnected();
}
else {
#if defined(TEST_CONNECT_ERRORS)
code = RandomizeConnectError(code);
#endif
//
// If the PR_Connect(...) would block, then poll for a connection.
//
if ((PR_WOULD_BLOCK_ERROR == code) || (PR_IN_PROGRESS_ERROR == code))
mPollFlags = (PR_POLL_EXCEPT | PR_POLL_WRITE);
//
// If the socket is already connected, then return success...
//
else if (PR_IS_CONNECTED_ERROR == code) {
//
// we are connected!
//
OnSocketConnected();
if (mSecInfo && !mProxyHost.IsEmpty() && proxyTransparent && usingSSL) {
// if the connection phase is finished, and the ssl layer has
// been pushed, and we were proxying (transparently; ie. nothing
// has to happen in the protocol layer above us), it's time for
// the ssl to start doing it's thing.
nsCOMPtr<nsISSLSocketControl> secCtrl =
do_QueryInterface(mSecInfo);
if (secCtrl) {
SOCKET_LOG((" calling ProxyStartSSL()\n"));
secCtrl->ProxyStartSSL();
}
// XXX what if we were forced to poll on the socket for a successful
// connection... wouldn't we need to call ProxyStartSSL after a call
// to PR_ConnectContinue indicates that we are connected?
//
// XXX this appears to be what the old socket transport did. why
// isn't this broken?
}
}
//
// A SOCKS request was rejected; get the actual error code from
// the OS error
//
else if (PR_UNKNOWN_ERROR == code &&
mProxyTransparent &&
!mProxyHost.IsEmpty()) {
code = PR_GetOSError();
rv = ErrorAccordingToNSPR(code);
}
//
// The connection was refused...
//
else {
if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase() &&
connectStarted && connectStarted) {
SendPRBlockingTelemetry(connectStarted,
Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_NORMAL,
Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_SHUTDOWN,
Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_CONNECTIVITY_CHANGE,
Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_LINK_CHANGE,
Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_OFFLINE);
}
rv = ErrorAccordingToNSPR(code);
if ((rv == NS_ERROR_CONNECTION_REFUSED) && !mProxyHost.IsEmpty())
rv = NS_ERROR_PROXY_CONNECTION_REFUSED;
}
}
return rv;
}
bool
nsSocketTransport::RecoverFromError()
{
NS_ASSERTION(NS_FAILED(mCondition), "there should be something wrong");
SOCKET_LOG(("nsSocketTransport::RecoverFromError [this=%p state=%x cond=%" PRIx32 "]\n",
this, mState, static_cast<uint32_t>(mCondition)));
if (mDoNotRetryToConnect) {
SOCKET_LOG(("nsSocketTransport::RecoverFromError do not retry because "
"mDoNotRetryToConnect is set [this=%p]\n",
this));
return false;
}
#if defined(XP_UNIX)
// Unix domain connections don't have multiple addresses to try,
// so the recovery techniques here don't apply.
if (mNetAddrIsSet && mNetAddr.raw.family == AF_LOCAL)
return false;
#endif
// can only recover from errors in these states
if (mState != STATE_RESOLVING && mState != STATE_CONNECTING)
return false;
nsresult rv;
// OK to check this outside mLock
NS_ASSERTION(!mFDconnected, "socket should not be connected");
// all connection failures need to be reported to DNS so that the next
// time we will use a different address if available.
// Skip conditions that can be cause by TCP Fast Open.
if ((!mFDFastOpenInProgress ||
((mCondition != NS_ERROR_CONNECTION_REFUSED) &&
(mCondition != NS_ERROR_NET_TIMEOUT) &&
(mCondition != NS_ERROR_PROXY_CONNECTION_REFUSED))) &&
mState == STATE_CONNECTING && mDNSRecord) {
mDNSRecord->ReportUnusable(SocketPort());
}
// can only recover from these errors
if (mCondition != NS_ERROR_CONNECTION_REFUSED &&
mCondition != NS_ERROR_PROXY_CONNECTION_REFUSED &&
mCondition != NS_ERROR_NET_TIMEOUT &&
mCondition != NS_ERROR_UNKNOWN_HOST &&
mCondition != NS_ERROR_UNKNOWN_PROXY_HOST)
return false;
bool tryAgain = false;
if (mFDFastOpenInProgress &&
((mCondition == NS_ERROR_CONNECTION_REFUSED) ||
(mCondition == NS_ERROR_NET_TIMEOUT) ||
(mCondition == NS_ERROR_PROXY_CONNECTION_REFUSED))) {
// TCP Fast Open can be blocked by middle boxes so we will retry
// without it.
tryAgain = true;
// If we cancel the connection because backup socket was successfully
// connected, mFDFastOpenInProgress will be true but mFastOpenCallback
// will be nullptr.
if (mFastOpenCallback) {
mFastOpenCallback->SetFastOpenConnected(mCondition, true);
}
mFastOpenCallback = nullptr;
} else {
if ((mState == STATE_CONNECTING) && mDNSRecord &&
mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
if (mNetAddr.raw.family == AF_INET) {
Telemetry::Accumulate(Telemetry::IPV4_AND_IPV6_ADDRESS_CONNECTIVITY,
UNSUCCESSFUL_CONNECTING_TO_IPV4_ADDRESS);
} else if (mNetAddr.raw.family == AF_INET6) {
Telemetry::Accumulate(Telemetry::IPV4_AND_IPV6_ADDRESS_CONNECTIVITY,
UNSUCCESSFUL_CONNECTING_TO_IPV6_ADDRESS);
}
}
if (mConnectionFlags & (DISABLE_IPV6 | DISABLE_IPV4) &&
mCondition == NS_ERROR_UNKNOWN_HOST &&
mState == STATE_RESOLVING &&
!mProxyTransparentResolvesHost) {
SOCKET_LOG((" trying lookup again with both ipv4/ipv6 enabled\n"));
mConnectionFlags &= ~(DISABLE_IPV6 | DISABLE_IPV4);
tryAgain = true;
}
// try next ip address only if past the resolver stage...
if (mState == STATE_CONNECTING && mDNSRecord) {
nsresult rv = mDNSRecord->GetNextAddr(SocketPort(), &mNetAddr);
if (NS_SUCCEEDED(rv)) {
SOCKET_LOG((" trying again with next ip address\n"));
tryAgain = true;
}
else if (mConnectionFlags & (DISABLE_IPV6 | DISABLE_IPV4)) {
// Drop state to closed. This will trigger new round of DNS
// resolving bellow.
// XXX Could be optimized to only switch the flags to save
// duplicate connection attempts.
SOCKET_LOG((" failed to connect all ipv4-only or ipv6-only "
"hosts, trying lookup/connect again with both "
"ipv4/ipv6\n"));
mState = STATE_CLOSED;
mConnectionFlags &= ~(DISABLE_IPV6 | DISABLE_IPV4);
tryAgain = true;
}
}
}
// prepare to try again.
if (tryAgain) {
uint32_t msg;
if (mState == STATE_CONNECTING) {
mState = STATE_RESOLVING;
msg = MSG_DNS_LOOKUP_COMPLETE;
}
else {
mState = STATE_CLOSED;
msg = MSG_ENSURE_CONNECT;
}
rv = PostEvent(msg, NS_OK);
if (NS_FAILED(rv))
tryAgain = false;
}
return tryAgain;
}
// called on the socket thread only
void
nsSocketTransport::OnMsgInputClosed(nsresult reason)
{
SOCKET_LOG(("nsSocketTransport::OnMsgInputClosed [this=%p reason=%" PRIx32 "]\n",
this, static_cast<uint32_t>(reason)));
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
mInputClosed = true;
// check if event should affect entire transport
if (NS_FAILED(reason) && (reason != NS_BASE_STREAM_CLOSED))
mCondition = reason; // XXX except if NS_FAILED(mCondition), right??
else if (mOutputClosed)
mCondition = NS_BASE_STREAM_CLOSED; // XXX except if NS_FAILED(mCondition), right??
else {
if (mState == STATE_TRANSFERRING)
mPollFlags &= ~PR_POLL_READ;
mInput.OnSocketReady(reason);
}
}
// called on the socket thread only
void
nsSocketTransport::OnMsgOutputClosed(nsresult reason)
{
SOCKET_LOG(("nsSocketTransport::OnMsgOutputClosed [this=%p reason=%" PRIx32 "]\n",
this, static_cast<uint32_t>(reason)));
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
mOutputClosed = true;
// check if event should affect entire transport
if (NS_FAILED(reason) && (reason != NS_BASE_STREAM_CLOSED))
mCondition = reason; // XXX except if NS_FAILED(mCondition), right??
else if (mInputClosed)
mCondition = NS_BASE_STREAM_CLOSED; // XXX except if NS_FAILED(mCondition), right??
else {
if (mState == STATE_TRANSFERRING)
mPollFlags &= ~PR_POLL_WRITE;
mOutput.OnSocketReady(reason);
}
}
void
nsSocketTransport::OnSocketConnected()
{
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
SOCKET_LOG((" advancing to STATE_TRANSFERRING\n"));
mPollFlags = (PR_POLL_READ | PR_POLL_WRITE | PR_POLL_EXCEPT);
mPollTimeout = mTimeouts[TIMEOUT_READ_WRITE];
mState = STATE_TRANSFERRING;
// Set the m*AddrIsSet flags only when state has reached TRANSFERRING
// because we need to make sure its value does not change due to failover
mNetAddrIsSet = true;
if (mFDFastOpenInProgress && mFastOpenCallback) {
// mFastOpenCallback can be null when for example h2 is negotiated on
// another connection to the same host and all connections are
// abandoned.
mFastOpenCallback->SetFastOpenConnected(NS_OK, false);
}
mFastOpenCallback = nullptr;
// assign mFD (must do this within the transport lock), but take care not
// to trample over mFDref if mFD is already set.
{
MutexAutoLock lock(mLock);
NS_ASSERTION(mFD.IsInitialized(), "no socket");
NS_ASSERTION(mFDref == 1, "wrong socket ref count");
SetSocketName(mFD);
mFDconnected = true;
mFDFastOpenInProgress = false;
}
// Ensure keepalive is configured correctly if previously enabled.
if (mKeepaliveEnabled) {
nsresult rv = SetKeepaliveEnabledInternal(true);
if (NS_WARN_IF(NS_FAILED(rv))) {
SOCKET_LOG((" SetKeepaliveEnabledInternal failed rv[0x%" PRIx32 "]",
static_cast<uint32_t>(rv)));
}
}
SendStatus(NS_NET_STATUS_CONNECTED_TO);
}
void
nsSocketTransport::SetSocketName(PRFileDesc *fd)
{
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
if (mSelfAddrIsSet) {
return;
}
PRNetAddr prAddr;
memset(&prAddr, 0, sizeof(prAddr));
if (PR_GetSockName(fd, &prAddr) == PR_SUCCESS) {
PRNetAddrToNetAddr(&prAddr, &mSelfAddr);
mSelfAddrIsSet = true;
}
}
PRFileDesc *
nsSocketTransport::GetFD_Locked()
{
mLock.AssertCurrentThreadOwns();
// mFD is not available to the streams while disconnected.
if (!mFDconnected)
return nullptr;
if (mFD.IsInitialized())
mFDref++;
return mFD;
}
PRFileDesc *
nsSocketTransport::GetFD_LockedAlsoDuringFastOpen()
{
mLock.AssertCurrentThreadOwns();
// mFD is not available to the streams while disconnected.
if (!mFDconnected && !mFDFastOpenInProgress) {
return nullptr;
}
if (mFD.IsInitialized()) {
mFDref++;
}
return mFD;
}
bool
nsSocketTransport::FastOpenInProgress()
{
mLock.AssertCurrentThreadOwns();
return mFDFastOpenInProgress;
}
class ThunkPRClose : public Runnable
{
public:
explicit ThunkPRClose(PRFileDesc *fd) : mFD(fd) {}
NS_IMETHOD Run() override
{
nsSocketTransport::CloseSocket(mFD,
gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
return NS_OK;
}
private:
PRFileDesc *mFD;
};
void
STS_PRCloseOnSocketTransport(PRFileDesc *fd)
{
if (gSocketTransportService) {
// Can't PR_Close() a socket off STS thread. Thunk it to STS to die
gSocketTransportService->Dispatch(new ThunkPRClose(fd), NS_DISPATCH_NORMAL);
} else {
// something horrible has happened
NS_ASSERTION(gSocketTransportService, "No STS service");
}
}
void
nsSocketTransport::ReleaseFD_Locked(PRFileDesc *fd)
{
mLock.AssertCurrentThreadOwns();
NS_ASSERTION(mFD == fd, "wrong fd");
SOCKET_LOG(("JIMB: ReleaseFD_Locked: mFDref = %" PRIuPTR "\n", mFDref));
if (--mFDref == 0) {
if (gIOService->IsNetTearingDown() &&
((PR_IntervalNow() - gIOService->NetTearingDownStarted()) >
gSocketTransportService->MaxTimeForPrClosePref())) {
// If shutdown last to long, let the socket leak and do not close it.
SOCKET_LOG(("Intentional leak"));
} else if (OnSocketThread()) {
SOCKET_LOG(("nsSocketTransport: calling PR_Close [this=%p]\n", this));
CloseSocket(mFD,
mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
} else {
// Can't PR_Close() a socket off STS thread. Thunk it to STS to die
STS_PRCloseOnSocketTransport(mFD);
}
mFD = nullptr;
}
}
//-----------------------------------------------------------------------------
// socket event handler impl
void
nsSocketTransport::OnSocketEvent(uint32_t type, nsresult status, nsISupports *param)
{
SOCKET_LOG(("nsSocketTransport::OnSocketEvent [this=%p type=%u status=%" PRIx32 " param=%p]\n",
this, type, static_cast<uint32_t>(status), param));
if (NS_FAILED(mCondition)) {
// block event since we're apparently already dead.
SOCKET_LOG((" blocking event [condition=%" PRIx32 "]\n",
static_cast<uint32_t>(mCondition)));
//
// notify input/output streams in case either has a pending notify.
//
mInput.OnSocketReady(mCondition);
mOutput.OnSocketReady(mCondition);
return;
}
switch (type) {
case MSG_ENSURE_CONNECT:
SOCKET_LOG((" MSG_ENSURE_CONNECT\n"));
//
// ensure that we have created a socket, attached it, and have a
// connection.
//
if (mState == STATE_CLOSED) {
// Unix domain sockets are ready to connect; mNetAddr is all we
// need. Internet address families require a DNS lookup (or possibly
// several) before we can connect.
#if defined(XP_UNIX)
if (mNetAddrIsSet && mNetAddr.raw.family == AF_LOCAL)
mCondition = InitiateSocket();
else
#endif
mCondition = ResolveHost();
} else {
SOCKET_LOG((" ignoring redundant event\n"));
}
break;
case MSG_DNS_LOOKUP_COMPLETE:
if (mDNSRequest) // only send this if we actually resolved anything
SendStatus(NS_NET_STATUS_RESOLVED_HOST);
SOCKET_LOG((" MSG_DNS_LOOKUP_COMPLETE\n"));
mDNSRequest = nullptr;
if (param) {
mDNSRecord = static_cast<nsIDNSRecord *>(param);
mDNSRecord->GetNextAddr(SocketPort(), &mNetAddr);
}
// status contains DNS lookup status
if (NS_FAILED(status)) {
// When using a HTTP proxy, NS_ERROR_UNKNOWN_HOST means the HTTP
// proxy host is not found, so we fixup the error code.
// For SOCKS proxies (mProxyTransparent == true), the socket
// transport resolves the real host here, so there's no fixup
// (see bug 226943).
if ((status == NS_ERROR_UNKNOWN_HOST) && !mProxyTransparent &&
!mProxyHost.IsEmpty())
mCondition = NS_ERROR_UNKNOWN_PROXY_HOST;
else
mCondition = status;
}
else if (mState == STATE_RESOLVING) {
mCondition = InitiateSocket();
}
break;
case MSG_RETRY_INIT_SOCKET:
mCondition = InitiateSocket();
break;
case MSG_INPUT_CLOSED:
SOCKET_LOG((" MSG_INPUT_CLOSED\n"));
OnMsgInputClosed(status);
break;
case MSG_INPUT_PENDING:
SOCKET_LOG((" MSG_INPUT_PENDING\n"));
OnMsgInputPending();
break;
case MSG_OUTPUT_CLOSED:
SOCKET_LOG((" MSG_OUTPUT_CLOSED\n"));
OnMsgOutputClosed(status);
break;
case MSG_OUTPUT_PENDING:
SOCKET_LOG((" MSG_OUTPUT_PENDING\n"));
OnMsgOutputPending();
break;
case MSG_TIMEOUT_CHANGED:
SOCKET_LOG((" MSG_TIMEOUT_CHANGED\n"));
mPollTimeout = mTimeouts[(mState == STATE_TRANSFERRING)
? TIMEOUT_READ_WRITE : TIMEOUT_CONNECT];
break;
default:
SOCKET_LOG((" unhandled event!\n"));
}
if (NS_FAILED(mCondition)) {
SOCKET_LOG((" after event [this=%p cond=%" PRIx32 "]\n", this,
static_cast<uint32_t>(mCondition)));
if (!mAttached) // need to process this error ourselves...
OnSocketDetached(nullptr);
}
else if (mPollFlags == PR_POLL_EXCEPT)
mPollFlags = 0; // make idle
}
//-----------------------------------------------------------------------------
// socket handler impl
void
nsSocketTransport::OnSocketReady(PRFileDesc *fd, int16_t outFlags)
{
SOCKET_LOG(("nsSocketTransport::OnSocketReady [this=%p outFlags=%hd]\n",
this, outFlags));
if (outFlags == -1) {
SOCKET_LOG(("socket timeout expired\n"));
mCondition = NS_ERROR_NET_TIMEOUT;
return;
}
if ((mState == STATE_TRANSFERRING) && mFastOpenLayerHasBufferedData) {
// We have some data buffered in TCPFastOpenLayer. We will flush them
// first. We need to do this first before calling OnSocketReady below
// so that the socket status events are kept in the correct order.
mFastOpenLayerHasBufferedData = TCPFastOpenFlushBuffer(fd);
if (mFastOpenLayerHasBufferedData) {
return;
} else {
SendStatus(NS_NET_STATUS_SENDING_TO);
}
// If we are done sending the buffered data continue with the normal
// path.
// In case of an error, TCPFastOpenFlushBuffer will return false and
// the normal code path will pick up the error.
mFastOpenLayerHasBufferedData = false;
}
if (mState == STATE_TRANSFERRING) {
// if waiting to write and socket is writable or hit an exception.
if ((mPollFlags & PR_POLL_WRITE) && (outFlags & ~PR_POLL_READ)) {
// assume that we won't need to poll any longer (the stream will
// request that we poll again if it is still pending).
mPollFlags &= ~PR_POLL_WRITE;
mOutput.OnSocketReady(NS_OK);
}
// if waiting to read and socket is readable or hit an exception.
if ((mPollFlags & PR_POLL_READ) && (outFlags & ~PR_POLL_WRITE)) {
// assume that we won't need to poll any longer (the stream will
// request that we poll again if it is still pending).
mPollFlags &= ~PR_POLL_READ;
mInput.OnSocketReady(NS_OK);
}
// Update poll timeout in case it was changed
mPollTimeout = mTimeouts[TIMEOUT_READ_WRITE];
}
else if ((mState == STATE_CONNECTING) && !gIOService->IsNetTearingDown()) {
// We do not need to do PR_ConnectContinue when we are already
// shutting down.
// We use PRIntervalTime here because we need
// nsIOService::LastOfflineStateChange time and
// nsIOService::LastConectivityChange time to be atomic.
PRIntervalTime connectStarted = 0;
if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
connectStarted = PR_IntervalNow();
}
PRStatus status = PR_ConnectContinue(fd, outFlags);
if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase() &&
connectStarted) {
SendPRBlockingTelemetry(connectStarted,
Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_NORMAL,
Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_SHUTDOWN,
Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_CONNECTIVITY_CHANGE,
Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_LINK_CHANGE,
Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_OFFLINE);
}
if (status == PR_SUCCESS) {
//
// we are connected!
//
OnSocketConnected();
if (mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
if (mNetAddr.raw.family == AF_INET) {
Telemetry::Accumulate(
Telemetry::IPV4_AND_IPV6_ADDRESS_CONNECTIVITY,
SUCCESSFUL_CONNECTING_TO_IPV4_ADDRESS);
} else if (mNetAddr.raw.family == AF_INET6) {
Telemetry::Accumulate(
Telemetry::IPV4_AND_IPV6_ADDRESS_CONNECTIVITY,
SUCCESSFUL_CONNECTING_TO_IPV6_ADDRESS);
}
}
}
else {
PRErrorCode code = PR_GetError();
#if defined(TEST_CONNECT_ERRORS)
code = RandomizeConnectError(code);
#endif
//
// If the connect is still not ready, then continue polling...
//
if ((PR_WOULD_BLOCK_ERROR == code) || (PR_IN_PROGRESS_ERROR == code)) {
// Set up the select flags for connect...
mPollFlags = (PR_POLL_EXCEPT | PR_POLL_WRITE);
// Update poll timeout in case it was changed
mPollTimeout = mTimeouts[TIMEOUT_CONNECT];
}
//
// The SOCKS proxy rejected our request. Find out why.
//
else if (PR_UNKNOWN_ERROR == code &&
mProxyTransparent &&
!mProxyHost.IsEmpty()) {
code = PR_GetOSError();
mCondition = ErrorAccordingToNSPR(code);
}
else {
//
// else, the connection failed...
//
mCondition = ErrorAccordingToNSPR(code);
if ((mCondition == NS_ERROR_CONNECTION_REFUSED) && !mProxyHost.IsEmpty())
mCondition = NS_ERROR_PROXY_CONNECTION_REFUSED;
SOCKET_LOG((" connection failed! [reason=%" PRIx32 "]\n",
static_cast<uint32_t>(mCondition)));
}
}
}
else if ((mState == STATE_CONNECTING) && gIOService->IsNetTearingDown()) {
// We do not need to do PR_ConnectContinue when we are already
// shutting down.
SOCKET_LOG(("We are in shutdown so skip PR_ConnectContinue and set "
"and error.\n"));
mCondition = NS_ERROR_ABORT;
}
else {
NS_ERROR("unexpected socket state");
mCondition = NS_ERROR_UNEXPECTED;
}
if (mPollFlags == PR_POLL_EXCEPT)
mPollFlags = 0; // make idle
}
// called on the socket thread only
void
nsSocketTransport::OnSocketDetached(PRFileDesc *fd)
{
SOCKET_LOG(("nsSocketTransport::OnSocketDetached [this=%p cond=%" PRIx32 "]\n",
this, static_cast<uint32_t>(mCondition)));
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
// if we didn't initiate this detach, then be sure to pass an error
// condition up to our consumers. (e.g., STS is shutting down.)
if (NS_SUCCEEDED(mCondition)) {
if (gIOService->IsOffline()) {
mCondition = NS_ERROR_OFFLINE;
}
else {
mCondition = NS_ERROR_ABORT;
}
}
mFastOpenLayerHasBufferedData = false;
// If we are not shutting down try again.
if (!gIOService->IsNetTearingDown() && RecoverFromError())
mCondition = NS_OK;
else {
mState = STATE_CLOSED;
// The error can happened before we start fast open. In that case do not
// call mFastOpenCallback->SetFastOpenConnected; If error happends during
// fast open, inform the halfOpenSocket.
// If we cancel the connection because backup socket was successfully
// connected, mFDFastOpenInProgress will be true but mFastOpenCallback
// will be nullptr.
if (mFDFastOpenInProgress && mFastOpenCallback) {
mFastOpenCallback->SetFastOpenConnected(mCondition, false);
}
mFastOpenCallback = nullptr;
// make sure there isn't any pending DNS request
if (mDNSRequest) {
mDNSRequest->Cancel(NS_ERROR_ABORT);
mDNSRequest = nullptr;
}
//
// notify input/output streams
//
mInput.OnSocketReady(mCondition);
mOutput.OnSocketReady(mCondition);
}
// If FastOpen has been used (mFDFastOpenInProgress==true),
// mFastOpenCallback must be nullptr now. We decided to recover from
// error like NET_TIMEOUT, CONNECTION_REFUSED or we have called
// SetFastOpenConnected(mCondition) in this function a couple of lines
// above.
// If FastOpen has not been used (mFDFastOpenInProgress==false) it can be
// that mFastOpenCallback is no null, this is the case when we recover from
// errors like UKNOWN_HOST in which case socket was not been connected yet
// and mFastOpenCallback-StartFastOpen was not be called yet (but we can
// still call it in the next try).
MOZ_ASSERT(!(mFDFastOpenInProgress && mFastOpenCallback));
// break any potential reference cycle between the security info object
// and ourselves by resetting its notification callbacks object. see
// bug 285991 for details.
nsCOMPtr<nsISSLSocketControl> secCtrl = do_QueryInterface(mSecInfo);
if (secCtrl)
secCtrl->SetNotificationCallbacks(nullptr);
// finally, release our reference to the socket (must do this within
// the transport lock) possibly closing the socket. Also release our
// listeners to break potential refcount cycles.
// We should be careful not to release mEventSink and mCallbacks while
// we're locked, because releasing it might require acquiring the lock
// again, so we just null out mEventSink and mCallbacks while we're
// holding the lock, and let the stack based objects' destuctors take
// care of destroying it if needed.
nsCOMPtr<nsIInterfaceRequestor> ourCallbacks;
nsCOMPtr<nsITransportEventSink> ourEventSink;
{
MutexAutoLock lock(mLock);
if (mFD.IsInitialized()) {
ReleaseFD_Locked(mFD);
// flag mFD as unusable; this prevents other consumers from
// acquiring a reference to mFD.
mFDconnected = false;
mFDFastOpenInProgress = false;
}
// We must release mCallbacks and mEventSink to avoid memory leak
// but only when RecoverFromError() above failed. Otherwise we lose
// link with UI and security callbacks on next connection attempt
// round. That would lead e.g. to a broken certificate exception page.
if (NS_FAILED(mCondition)) {
mCallbacks.swap(ourCallbacks);
mEventSink.swap(ourEventSink);
}
}
}
void
nsSocketTransport::IsLocal(bool *aIsLocal)
{
{
MutexAutoLock lock(mLock);
#if defined(XP_UNIX)
// Unix-domain sockets are always local.
if (mNetAddr.raw.family == PR_AF_LOCAL)
{
*aIsLocal = true;
return;
}
#endif
*aIsLocal = IsLoopBackAddress(&mNetAddr);
}
}
//-----------------------------------------------------------------------------
// xpcom api
NS_IMPL_ISUPPORTS(nsSocketTransport,
nsISocketTransport,
nsITransport,
nsIDNSListener,
nsIClassInfo,
nsIInterfaceRequestor)
NS_IMPL_CI_INTERFACE_GETTER(nsSocketTransport,
nsISocketTransport,
nsITransport,
nsIDNSListener,
nsIInterfaceRequestor)
NS_IMETHODIMP
nsSocketTransport::OpenInputStream(uint32_t flags,
uint32_t segsize,
uint32_t segcount,
nsIInputStream **result)
{
SOCKET_LOG(("nsSocketTransport::OpenInputStream [this=%p flags=%x]\n",
this, flags));
NS_ENSURE_TRUE(!mInput.IsReferenced(), NS_ERROR_UNEXPECTED);
nsresult rv;
nsCOMPtr<nsIAsyncInputStream> pipeIn;
if (!(flags & OPEN_UNBUFFERED) || (flags & OPEN_BLOCKING)) {
// XXX if the caller wants blocking, then the caller also gets buffered!
//bool openBuffered = !(flags & OPEN_UNBUFFERED);
bool openBlocking = (flags & OPEN_BLOCKING);
net_ResolveSegmentParams(segsize, segcount);
// create a pipe
nsCOMPtr<nsIAsyncOutputStream> pipeOut;
rv = NS_NewPipe2(getter_AddRefs(pipeIn), getter_AddRefs(pipeOut),
!openBlocking, true, segsize, segcount);
if (NS_FAILED(rv)) return rv;
// async copy from socket to pipe
rv = NS_AsyncCopy(&mInput, pipeOut, mSocketTransportService,
NS_ASYNCCOPY_VIA_WRITESEGMENTS, segsize);
if (NS_FAILED(rv)) return rv;
*result = pipeIn;
}
else
*result = &mInput;
// flag input stream as open
mInputClosed = false;
rv = PostEvent(MSG_ENSURE_CONNECT);
if (NS_FAILED(rv)) return rv;
NS_ADDREF(*result);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::OpenOutputStream(uint32_t flags,
uint32_t segsize,
uint32_t segcount,
nsIOutputStream **result)
{
SOCKET_LOG(("nsSocketTransport::OpenOutputStream [this=%p flags=%x]\n",
this, flags));
NS_ENSURE_TRUE(!mOutput.IsReferenced(), NS_ERROR_UNEXPECTED);
nsresult rv;
nsCOMPtr<nsIAsyncOutputStream> pipeOut;
if (!(flags & OPEN_UNBUFFERED) || (flags & OPEN_BLOCKING)) {
// XXX if the caller wants blocking, then the caller also gets buffered!
//bool openBuffered = !(flags & OPEN_UNBUFFERED);
bool openBlocking = (flags & OPEN_BLOCKING);
net_ResolveSegmentParams(segsize, segcount);
// create a pipe
nsCOMPtr<nsIAsyncInputStream> pipeIn;
rv = NS_NewPipe2(getter_AddRefs(pipeIn), getter_AddRefs(pipeOut),
true, !openBlocking, segsize, segcount);
if (NS_FAILED(rv)) return rv;
// async copy from socket to pipe
rv = NS_AsyncCopy(pipeIn, &mOutput, mSocketTransportService,
NS_ASYNCCOPY_VIA_READSEGMENTS, segsize);
if (NS_FAILED(rv)) return rv;
*result = pipeOut;
}
else
*result = &mOutput;
// flag output stream as open
mOutputClosed = false;
rv = PostEvent(MSG_ENSURE_CONNECT);
if (NS_FAILED(rv)) return rv;
NS_ADDREF(*result);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::Close(nsresult reason)
{
if (NS_SUCCEEDED(reason))
reason = NS_BASE_STREAM_CLOSED;
mDoNotRetryToConnect = true;
if (mFDFastOpenInProgress && mFastOpenCallback) {
mFastOpenCallback->SetFastOpenConnected(reason, false);
}
mFastOpenCallback = nullptr;
mInput.CloseWithStatus(reason);
mOutput.CloseWithStatus(reason);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetSecurityInfo(nsISupports **secinfo)
{
MutexAutoLock lock(mLock);
NS_IF_ADDREF(*secinfo = mSecInfo);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetSecurityCallbacks(nsIInterfaceRequestor **callbacks)
{
MutexAutoLock lock(mLock);
NS_IF_ADDREF(*callbacks = mCallbacks);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetSecurityCallbacks(nsIInterfaceRequestor *callbacks)
{
nsCOMPtr<nsIInterfaceRequestor> threadsafeCallbacks;
NS_NewNotificationCallbacksAggregation(callbacks, nullptr,
GetCurrentThreadEventTarget(),
getter_AddRefs(threadsafeCallbacks));
nsCOMPtr<nsISupports> secinfo;
{
MutexAutoLock lock(mLock);
mCallbacks = threadsafeCallbacks;
SOCKET_LOG(("Reset callbacks for secinfo=%p callbacks=%p\n",
mSecInfo.get(), mCallbacks.get()));
secinfo = mSecInfo;
}
// don't call into PSM while holding mLock!!
nsCOMPtr<nsISSLSocketControl> secCtrl(do_QueryInterface(secinfo));
if (secCtrl)
secCtrl->SetNotificationCallbacks(threadsafeCallbacks);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetEventSink(nsITransportEventSink *sink,
nsIEventTarget *target)
{
nsCOMPtr<nsITransportEventSink> temp;
if (target) {
nsresult rv = net_NewTransportEventSinkProxy(getter_AddRefs(temp),
sink, target);
if (NS_FAILED(rv))
return rv;
sink = temp.get();
}
MutexAutoLock lock(mLock);
mEventSink = sink;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::IsAlive(bool *result)
{
*result = false;
// During Fast Open we need to return true here.
if (mFDFastOpenInProgress) {
*result = true;
return NS_OK;
}
nsresult conditionWhileLocked = NS_OK;
PRFileDescAutoLock fd(this, false, &conditionWhileLocked);
if (NS_FAILED(conditionWhileLocked) || !fd.IsInitialized()) {
return NS_OK;
}
// XXX do some idle-time based checks??
char c;
int32_t rval = PR_Recv(fd, &c, 1, PR_MSG_PEEK, 0);
if ((rval > 0) || (rval < 0 && PR_GetError() == PR_WOULD_BLOCK_ERROR))
*result = true;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetHost(nsACString &host)
{
host = SocketHost();
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetPort(int32_t *port)
{
*port = (int32_t) SocketPort();
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetNetworkInterfaceId(nsACString &aNetworkInterfaceId)
{
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
aNetworkInterfaceId = mNetworkInterfaceId;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetNetworkInterfaceId(const nsACString &aNetworkInterfaceId)
{
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
mNetworkInterfaceId = aNetworkInterfaceId;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetScriptableOriginAttributes(JSContext* aCx,
JS::MutableHandle<JS::Value> aOriginAttributes)
{
if (NS_WARN_IF(!ToJSValue(aCx, mOriginAttributes, aOriginAttributes))) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetScriptableOriginAttributes(JSContext* aCx,
JS::Handle<JS::Value> aOriginAttributes)
{
MutexAutoLock lock(mLock);
NS_ENSURE_FALSE(mFD.IsInitialized(), NS_ERROR_FAILURE);
OriginAttributes attrs;
if (!aOriginAttributes.isObject() || !attrs.Init(aCx, aOriginAttributes)) {
return NS_ERROR_INVALID_ARG;
}
mOriginAttributes = attrs;
return NS_OK;
}
nsresult
nsSocketTransport::GetOriginAttributes(OriginAttributes* aOriginAttributes)
{
NS_ENSURE_ARG(aOriginAttributes);
*aOriginAttributes = mOriginAttributes;
return NS_OK;
}
nsresult
nsSocketTransport::SetOriginAttributes(const OriginAttributes& aOriginAttributes)
{
MutexAutoLock lock(mLock);
NS_ENSURE_FALSE(mFD.IsInitialized(), NS_ERROR_FAILURE);
mOriginAttributes = aOriginAttributes;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetPeerAddr(NetAddr *addr)
{
// once we are in the connected state, mNetAddr will not change.
// so if we can verify that we are in the connected state, then
// we can freely access mNetAddr from any thread without being
// inside a critical section.
if (!mNetAddrIsSet) {
SOCKET_LOG(("nsSocketTransport::GetPeerAddr [this=%p state=%d] "
"NOT_AVAILABLE because not yet connected.", this, mState));
return NS_ERROR_NOT_AVAILABLE;
}
memcpy(addr, &mNetAddr, sizeof(NetAddr));
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetSelfAddr(NetAddr *addr)
{
// once we are in the connected state, mSelfAddr will not change.
// so if we can verify that we are in the connected state, then
// we can freely access mSelfAddr from any thread without being
// inside a critical section.
if (!mSelfAddrIsSet) {
SOCKET_LOG(("nsSocketTransport::GetSelfAddr [this=%p state=%d] "
"NOT_AVAILABLE because not yet connected.", this, mState));
return NS_ERROR_NOT_AVAILABLE;
}
memcpy(addr, &mSelfAddr, sizeof(NetAddr));
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::Bind(NetAddr *aLocalAddr)
{
NS_ENSURE_ARG(aLocalAddr);
MutexAutoLock lock(mLock);
if (mAttached) {
return NS_ERROR_FAILURE;
}
mBindAddr = new NetAddr();
memcpy(mBindAddr.get(), aLocalAddr, sizeof(NetAddr));
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetScriptablePeerAddr(nsINetAddr * *addr)
{
NetAddr rawAddr;
nsresult rv;
rv = GetPeerAddr(&rawAddr);
if (NS_FAILED(rv))
return rv;
NS_ADDREF(*addr = new nsNetAddr(&rawAddr));
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetScriptableSelfAddr(nsINetAddr * *addr)
{
NetAddr rawAddr;
nsresult rv;
rv = GetSelfAddr(&rawAddr);
if (NS_FAILED(rv))
return rv;
NS_ADDREF(*addr = new nsNetAddr(&rawAddr));
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetTimeout(uint32_t type, uint32_t *value)
{
NS_ENSURE_ARG_MAX(type, nsISocketTransport::TIMEOUT_READ_WRITE);
*value = (uint32_t) mTimeouts[type];
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetTimeout(uint32_t type, uint32_t value)
{
NS_ENSURE_ARG_MAX(type, nsISocketTransport::TIMEOUT_READ_WRITE);
// truncate overly large timeout values.
mTimeouts[type] = (uint16_t) std::min<uint32_t>(value, UINT16_MAX);
PostEvent(MSG_TIMEOUT_CHANGED);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetReuseAddrPort(bool reuseAddrPort)
{
mReuseAddrPort = reuseAddrPort;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetQoSBits(uint8_t aQoSBits)
{
// Don't do any checking here of bits. Why? Because as of RFC-4594
// several different Class Selector and Assured Forwarding values
// have been defined, but that isn't to say more won't be added later.
// In that case, any checking would be an impediment to interoperating
// with newer QoS definitions.
mQoSBits = aQoSBits;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetQoSBits(uint8_t *aQoSBits)
{
*aQoSBits = mQoSBits;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetRecvBufferSize(uint32_t *aSize)
{
PRFileDescAutoLock fd(this, false);
if (!fd.IsInitialized())
return NS_ERROR_NOT_CONNECTED;
nsresult rv = NS_OK;
PRSocketOptionData opt;
opt.option = PR_SockOpt_RecvBufferSize;
if (PR_GetSocketOption(fd, &opt) == PR_SUCCESS)
*aSize = opt.value.recv_buffer_size;
else
rv = NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP
nsSocketTransport::GetSendBufferSize(uint32_t *aSize)
{
PRFileDescAutoLock fd(this, false);
if (!fd.IsInitialized())
return NS_ERROR_NOT_CONNECTED;
nsresult rv = NS_OK;
PRSocketOptionData opt;
opt.option = PR_SockOpt_SendBufferSize;
if (PR_GetSocketOption(fd, &opt) == PR_SUCCESS)
*aSize = opt.value.send_buffer_size;
else
rv = NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP
nsSocketTransport::SetRecvBufferSize(uint32_t aSize)
{
PRFileDescAutoLock fd(this, false);
if (!fd.IsInitialized())
return NS_ERROR_NOT_CONNECTED;
nsresult rv = NS_OK;
PRSocketOptionData opt;
opt.option = PR_SockOpt_RecvBufferSize;
opt.value.recv_buffer_size = aSize;
if (PR_SetSocketOption(fd, &opt) != PR_SUCCESS)
rv = NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP
nsSocketTransport::SetSendBufferSize(uint32_t aSize)
{
PRFileDescAutoLock fd(this, false);
if (!fd.IsInitialized())
return NS_ERROR_NOT_CONNECTED;
nsresult rv = NS_OK;
PRSocketOptionData opt;
opt.option = PR_SockOpt_SendBufferSize;
opt.value.send_buffer_size = aSize;
if (PR_SetSocketOption(fd, &opt) != PR_SUCCESS)
rv = NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP
nsSocketTransport::OnLookupComplete(nsICancelable *request,
nsIDNSRecord *rec,
nsresult status)
{
// flag host lookup complete for the benefit of the ResolveHost method.
mResolving = false;
nsresult rv = PostEvent(MSG_DNS_LOOKUP_COMPLETE, status, rec);
// if posting a message fails, then we should assume that the socket
// transport has been shutdown. this should never happen! if it does
// it means that the socket transport service was shutdown before the
// DNS service.
if (NS_FAILED(rv))
NS_WARNING("unable to post DNS lookup complete message");
return NS_OK;
}
// nsIInterfaceRequestor
NS_IMETHODIMP
nsSocketTransport::GetInterface(const nsIID &iid, void **result)
{
if (iid.Equals(NS_GET_IID(nsIDNSRecord))) {
return mDNSRecord ?
mDNSRecord->QueryInterface(iid, result) : NS_ERROR_NO_INTERFACE;
}
return this->QueryInterface(iid, result);
}
NS_IMETHODIMP
nsSocketTransport::GetInterfaces(uint32_t *count, nsIID * **array)
{
return NS_CI_INTERFACE_GETTER_NAME(nsSocketTransport)(count, array);
}
NS_IMETHODIMP
nsSocketTransport::GetScriptableHelper(nsIXPCScriptable **_retval)
{
*_retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetContractID(char * *aContractID)
{
*aContractID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetClassDescription(char * *aClassDescription)
{
*aClassDescription = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetClassID(nsCID * *aClassID)
{
*aClassID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetFlags(uint32_t *aFlags)
{
*aFlags = nsIClassInfo::THREADSAFE;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
{
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsSocketTransport::GetConnectionFlags(uint32_t *value)
{
*value = mConnectionFlags;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetConnectionFlags(uint32_t value)
{
mConnectionFlags = value;
mIsPrivate = value & nsISocketTransport::NO_PERMANENT_STORAGE;
return NS_OK;
}
void
nsSocketTransport::OnKeepaliveEnabledPrefChange(bool aEnabled)
{
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
// The global pref toggles keepalive as a system feature; it only affects
// an individual socket if keepalive has been specifically enabled for it.
// So, ensure keepalive is configured correctly if previously enabled.
if (mKeepaliveEnabled) {
nsresult rv = SetKeepaliveEnabledInternal(aEnabled);
if (NS_WARN_IF(NS_FAILED(rv))) {
SOCKET_LOG((" SetKeepaliveEnabledInternal [%s] failed rv[0x%" PRIx32 "]",
aEnabled ? "enable" : "disable", static_cast<uint32_t>(rv)));
}
}
}
nsresult
nsSocketTransport::SetKeepaliveEnabledInternal(bool aEnable)
{
MOZ_ASSERT(mKeepaliveIdleTimeS > 0 &&
mKeepaliveIdleTimeS <= kMaxTCPKeepIdle);
MOZ_ASSERT(mKeepaliveRetryIntervalS > 0 &&
mKeepaliveRetryIntervalS <= kMaxTCPKeepIntvl);
MOZ_ASSERT(mKeepaliveProbeCount > 0 &&
mKeepaliveProbeCount <= kMaxTCPKeepCount);
PRFileDescAutoLock fd(this, true);
if (NS_WARN_IF(!fd.IsInitialized())) {
return NS_ERROR_NOT_INITIALIZED;
}
// Only enable if keepalives are globally enabled, but ensure other
// options are set correctly on the fd.
bool enable = aEnable && mSocketTransportService->IsKeepaliveEnabled();
nsresult rv = fd.SetKeepaliveVals(enable,
mKeepaliveIdleTimeS,
mKeepaliveRetryIntervalS,
mKeepaliveProbeCount);
if (NS_WARN_IF(NS_FAILED(rv))) {
SOCKET_LOG((" SetKeepaliveVals failed rv[0x%" PRIx32 "]", static_cast<uint32_t>(rv)));
return rv;
}
rv = fd.SetKeepaliveEnabled(enable);
if (NS_WARN_IF(NS_FAILED(rv))) {
SOCKET_LOG((" SetKeepaliveEnabled failed rv[0x%" PRIx32 "]", static_cast<uint32_t>(rv)));
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetKeepaliveEnabled(bool *aResult)
{
MOZ_ASSERT(aResult);
*aResult = mKeepaliveEnabled;
return NS_OK;
}
nsresult
nsSocketTransport::EnsureKeepaliveValsAreInitialized()
{
nsresult rv = NS_OK;
int32_t val = -1;
if (mKeepaliveIdleTimeS == -1) {
rv = mSocketTransportService->GetKeepaliveIdleTime(&val);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mKeepaliveIdleTimeS = val;
}
if (mKeepaliveRetryIntervalS == -1) {
rv = mSocketTransportService->GetKeepaliveRetryInterval(&val);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mKeepaliveRetryIntervalS = val;
}
if (mKeepaliveProbeCount == -1) {
rv = mSocketTransportService->GetKeepaliveProbeCount(&val);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mKeepaliveProbeCount = val;
}
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetKeepaliveEnabled(bool aEnable)
{
#if defined(XP_WIN) || defined(XP_UNIX) || defined(XP_MACOSX)
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
if (aEnable == mKeepaliveEnabled) {
SOCKET_LOG(("nsSocketTransport::SetKeepaliveEnabled [%p] already %s.",
this, aEnable ? "enabled" : "disabled"));
return NS_OK;
}
nsresult rv = NS_OK;
if (aEnable) {
rv = EnsureKeepaliveValsAreInitialized();
if (NS_WARN_IF(NS_FAILED(rv))) {
SOCKET_LOG((" SetKeepaliveEnabled [%p] "
"error [0x%" PRIx32 "] initializing keepalive vals",
this, static_cast<uint32_t>(rv)));
return rv;
}
}
SOCKET_LOG(("nsSocketTransport::SetKeepaliveEnabled [%p] "
"%s, idle time[%ds] retry interval[%ds] packet count[%d]: "
"globally %s.",
this, aEnable ? "enabled" : "disabled",
mKeepaliveIdleTimeS, mKeepaliveRetryIntervalS,
mKeepaliveProbeCount,
mSocketTransportService->IsKeepaliveEnabled() ?
"enabled" : "disabled"));
// Set mKeepaliveEnabled here so that state is maintained; it is possible
// that we're in between fds, e.g. the 1st IP address failed, so we're about
// to retry on a 2nd from the DNS record.
mKeepaliveEnabled = aEnable;
rv = SetKeepaliveEnabledInternal(aEnable);
if (NS_WARN_IF(NS_FAILED(rv))) {
SOCKET_LOG((" SetKeepaliveEnabledInternal failed rv[0x%" PRIx32 "]",
static_cast<uint32_t>(rv)));
return rv;
}
return NS_OK;
#else /* !(defined(XP_WIN) || defined(XP_UNIX) || defined(XP_MACOSX)) */
SOCKET_LOG(("nsSocketTransport::SetKeepaliveEnabled unsupported platform"));
return NS_ERROR_NOT_IMPLEMENTED;
#endif
}
NS_IMETHODIMP
nsSocketTransport::SetKeepaliveVals(int32_t aIdleTime,
int32_t aRetryInterval)
{
#if defined(XP_WIN) || defined(XP_UNIX) || defined(XP_MACOSX)
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
if (NS_WARN_IF(aIdleTime <= 0 || kMaxTCPKeepIdle < aIdleTime)) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(aRetryInterval <= 0 ||
kMaxTCPKeepIntvl < aRetryInterval)) {
return NS_ERROR_INVALID_ARG;
}
if (aIdleTime == mKeepaliveIdleTimeS &&
aRetryInterval == mKeepaliveRetryIntervalS) {
SOCKET_LOG(("nsSocketTransport::SetKeepaliveVals [%p] idle time "
"already %ds and retry interval already %ds.",
this, mKeepaliveIdleTimeS,
mKeepaliveRetryIntervalS));
return NS_OK;
}
mKeepaliveIdleTimeS = aIdleTime;
mKeepaliveRetryIntervalS = aRetryInterval;
nsresult rv = NS_OK;
if (mKeepaliveProbeCount == -1) {
int32_t val = -1;
nsresult rv = mSocketTransportService->GetKeepaliveProbeCount(&val);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mKeepaliveProbeCount = val;
}
SOCKET_LOG(("nsSocketTransport::SetKeepaliveVals [%p] "
"keepalive %s, idle time[%ds] retry interval[%ds] "
"packet count[%d]",
this, mKeepaliveEnabled ? "enabled" : "disabled",
mKeepaliveIdleTimeS, mKeepaliveRetryIntervalS,
mKeepaliveProbeCount));
PRFileDescAutoLock fd(this, true);
if (NS_WARN_IF(!fd.IsInitialized())) {
return NS_ERROR_NULL_POINTER;
}
rv = fd.SetKeepaliveVals(mKeepaliveEnabled,
mKeepaliveIdleTimeS,
mKeepaliveRetryIntervalS,
mKeepaliveProbeCount);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
#else
SOCKET_LOG(("nsSocketTransport::SetKeepaliveVals unsupported platform"));
return NS_ERROR_NOT_IMPLEMENTED;
#endif
}
#ifdef ENABLE_SOCKET_TRACING
#include <stdio.h>
#include <ctype.h>
#include "prenv.h"
static void
DumpBytesToFile(const char *path, const char *header, const char *buf, int32_t n)
{
FILE *fp = fopen(path, "a");
fprintf(fp, "\n%s [%d bytes]\n", header, n);
const unsigned char *p;
while (n) {
p = (const unsigned char *) buf;
int32_t i, row_max = std::min(16, n);
for (i = 0; i < row_max; ++i)
fprintf(fp, "%02x ", *p++);
for (i = row_max; i < 16; ++i)
fprintf(fp, " ");
p = (const unsigned char *) buf;
for (i = 0; i < row_max; ++i, ++p) {
if (isprint(*p))
fprintf(fp, "%c", *p);
else
fprintf(fp, ".");
}
fprintf(fp, "\n");
buf += row_max;
n -= row_max;
}
fprintf(fp, "\n");
fclose(fp);
}
void
nsSocketTransport::TraceInBuf(const char *buf, int32_t n)
{
char *val = PR_GetEnv("NECKO_SOCKET_TRACE_LOG");
if (!val || !*val)
return;
nsAutoCString header;
header.AssignLiteral("Reading from: ");
header.Append(mHost);
header.Append(':');
header.AppendInt(mPort);
DumpBytesToFile(val, header.get(), buf, n);
}
void
nsSocketTransport::TraceOutBuf(const char *buf, int32_t n)
{
char *val = PR_GetEnv("NECKO_SOCKET_TRACE_LOG");
if (!val || !*val)
return;
nsAutoCString header;
header.AssignLiteral("Writing to: ");
header.Append(mHost);
header.Append(':');
header.AppendInt(mPort);
DumpBytesToFile(val, header.get(), buf, n);
}
#endif
static void LogNSPRError(const char* aPrefix, const void *aObjPtr)
{
#if defined(DEBUG)
PRErrorCode errCode = PR_GetError();
int errLen = PR_GetErrorTextLength();
nsAutoCString errStr;
if (errLen > 0) {
errStr.SetLength(errLen);
PR_GetErrorText(errStr.BeginWriting());
}
NS_WARNING(nsPrintfCString(
"%s [%p] NSPR error[0x%x] %s.",
aPrefix ? aPrefix : "nsSocketTransport", aObjPtr, errCode,
errLen > 0 ? errStr.BeginReading() : "<no error text>").get());
#endif
}
nsresult
nsSocketTransport::PRFileDescAutoLock::SetKeepaliveEnabled(bool aEnable)
{
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
MOZ_ASSERT(!(aEnable && !gSocketTransportService->IsKeepaliveEnabled()),
"Cannot enable keepalive if global pref is disabled!");
if (aEnable && !gSocketTransportService->IsKeepaliveEnabled()) {
return NS_ERROR_ILLEGAL_VALUE;
}
PRSocketOptionData opt;
opt.option = PR_SockOpt_Keepalive;
opt.value.keep_alive = aEnable;
PRStatus status = PR_SetSocketOption(mFd, &opt);
if (NS_WARN_IF(status != PR_SUCCESS)) {
LogNSPRError("nsSocketTransport::PRFileDescAutoLock::SetKeepaliveEnabled",
mSocketTransport);
return ErrorAccordingToNSPR(PR_GetError());
}
return NS_OK;
}
static void LogOSError(const char *aPrefix, const void *aObjPtr)
{
#if defined(DEBUG)
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
#ifdef XP_WIN
DWORD errCode = WSAGetLastError();
LPVOID errMessage;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
errCode,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &errMessage,
0, NULL);
#else
int errCode = errno;
char *errMessage = strerror(errno);
#endif
NS_WARNING(nsPrintfCString(
"%s [%p] OS error[0x%x] %s",
aPrefix ? aPrefix : "nsSocketTransport", aObjPtr, errCode,
errMessage ? errMessage : "<no error text>").get());
#ifdef XP_WIN
LocalFree(errMessage);
#endif
#endif
}
/* XXX PR_SetSockOpt does not support setting keepalive values, so native
* handles and platform specific apis (setsockopt, WSAIOCtl) are used in this
* file. Requires inclusion of NSPR private/pprio.h, and platform headers.
*/
nsresult
nsSocketTransport::PRFileDescAutoLock::SetKeepaliveVals(bool aEnabled,
int aIdleTime,
int aRetryInterval,
int aProbeCount)
{
#if defined(XP_WIN) || defined(XP_UNIX) || defined(XP_MACOSX)
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
if (NS_WARN_IF(aIdleTime <= 0 || kMaxTCPKeepIdle < aIdleTime)) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(aRetryInterval <= 0 ||
kMaxTCPKeepIntvl < aRetryInterval)) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(aProbeCount <= 0 || kMaxTCPKeepCount < aProbeCount)) {
return NS_ERROR_INVALID_ARG;
}
PROsfd sock = PR_FileDesc2NativeHandle(mFd);
if (NS_WARN_IF(sock == -1)) {
LogNSPRError("nsSocketTransport::PRFileDescAutoLock::SetKeepaliveVals",
mSocketTransport);
return ErrorAccordingToNSPR(PR_GetError());
}
#endif
#if defined(XP_WIN)
// Windows allows idle time and retry interval to be set; NOT ping count.
struct tcp_keepalive keepalive_vals = {
(u_long)aEnabled,
// Windows uses msec.
(u_long)(aIdleTime * 1000UL),
(u_long)(aRetryInterval * 1000UL)
};
DWORD bytes_returned;
int err = WSAIoctl(sock, SIO_KEEPALIVE_VALS, &keepalive_vals,
sizeof(keepalive_vals), NULL, 0, &bytes_returned, NULL,
NULL);
if (NS_WARN_IF(err)) {
LogOSError("nsSocketTransport WSAIoctl failed", mSocketTransport);
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
#elif defined(XP_DARWIN)
// Darwin uses sec; only supports idle time being set.
int err = setsockopt(sock, IPPROTO_TCP, TCP_KEEPALIVE,
&aIdleTime, sizeof(aIdleTime));
if (NS_WARN_IF(err)) {
LogOSError("nsSocketTransport Failed setting TCP_KEEPALIVE",
mSocketTransport);
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
#elif defined(XP_UNIX)
// Not all *nix OSes support the following setsockopt() options
// ... but we assume they are supported in the Android kernel;
// build errors will tell us if they are not.
#if defined(ANDROID) || defined(TCP_KEEPIDLE)
// Idle time until first keepalive probe; interval between ack'd probes; seconds.
int err = setsockopt(sock, IPPROTO_TCP, TCP_KEEPIDLE,
&aIdleTime, sizeof(aIdleTime));
if (NS_WARN_IF(err)) {
LogOSError("nsSocketTransport Failed setting TCP_KEEPIDLE",
mSocketTransport);
return NS_ERROR_UNEXPECTED;
}
#endif
#if defined(ANDROID) || defined(TCP_KEEPINTVL)
// Interval between unack'd keepalive probes; seconds.
err = setsockopt(sock, IPPROTO_TCP, TCP_KEEPINTVL,
&aRetryInterval, sizeof(aRetryInterval));
if (NS_WARN_IF(err)) {
LogOSError("nsSocketTransport Failed setting TCP_KEEPINTVL",
mSocketTransport);
return NS_ERROR_UNEXPECTED;
}
#endif
#if defined(ANDROID) || defined(TCP_KEEPCNT)
// Number of unack'd keepalive probes before connection times out.
err = setsockopt(sock, IPPROTO_TCP, TCP_KEEPCNT,
&aProbeCount, sizeof(aProbeCount));
if (NS_WARN_IF(err)) {
LogOSError("nsSocketTransport Failed setting TCP_KEEPCNT",
mSocketTransport);
return NS_ERROR_UNEXPECTED;
}
#endif
return NS_OK;
#else
MOZ_ASSERT(false, "nsSocketTransport::PRFileDescAutoLock::SetKeepaliveVals "
"called on unsupported platform!");
return NS_ERROR_UNEXPECTED;
#endif
}
void
nsSocketTransport::CloseSocket(PRFileDesc *aFd, bool aTelemetryEnabled)
{
#if defined(XP_WIN)
AttachShutdownLayer(aFd);
#endif
// We use PRIntervalTime here because we need
// nsIOService::LastOfflineStateChange time and
// nsIOService::LastConectivityChange time to be atomic.
PRIntervalTime closeStarted;
if (aTelemetryEnabled) {
closeStarted = PR_IntervalNow();
}
PR_Close(aFd);
if (aTelemetryEnabled) {
SendPRBlockingTelemetry(closeStarted,
Telemetry::PRCLOSE_TCP_BLOCKING_TIME_NORMAL,
Telemetry::PRCLOSE_TCP_BLOCKING_TIME_SHUTDOWN,
Telemetry::PRCLOSE_TCP_BLOCKING_TIME_CONNECTIVITY_CHANGE,
Telemetry::PRCLOSE_TCP_BLOCKING_TIME_LINK_CHANGE,
Telemetry::PRCLOSE_TCP_BLOCKING_TIME_OFFLINE);
}
}
void
nsSocketTransport::SendPRBlockingTelemetry(PRIntervalTime aStart,
Telemetry::HistogramID aIDNormal,
Telemetry::HistogramID aIDShutdown,
Telemetry::HistogramID aIDConnectivityChange,
Telemetry::HistogramID aIDLinkChange,
Telemetry::HistogramID aIDOffline)
{
PRIntervalTime now = PR_IntervalNow();
if (gIOService->IsNetTearingDown()) {
Telemetry::Accumulate(aIDShutdown,
PR_IntervalToMilliseconds(now - aStart));
} else if (PR_IntervalToSeconds(now - gIOService->LastConnectivityChange())
< 60) {
Telemetry::Accumulate(aIDConnectivityChange,
PR_IntervalToMilliseconds(now - aStart));
} else if (PR_IntervalToSeconds(now - gIOService->LastNetworkLinkChange())
< 60) {
Telemetry::Accumulate(aIDLinkChange,
PR_IntervalToMilliseconds(now - aStart));
} else if (PR_IntervalToSeconds(now - gIOService->LastOfflineStateChange())
< 60) {
Telemetry::Accumulate(aIDOffline,
PR_IntervalToMilliseconds(now - aStart));
} else {
Telemetry::Accumulate(aIDNormal,
PR_IntervalToMilliseconds(now - aStart));
}
}
NS_IMETHODIMP
nsSocketTransport::SetFastOpenCallback(TCPFastOpen *aFastOpen)
{
mFastOpenCallback = aFastOpen;
return NS_OK;
}
} // namespace net
} // namespace mozilla
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