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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: 2 -*- */
/* vim:set ts=4 sw=2 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/SyncRunnable.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 "nsCOMPtr.h"
#include "plstr.h"
#include "prerr.h"
#include "IOActivityMonitor.h"
#include "NSSErrorsService.h"
#include "mozilla/dom/ToJSValue.h"
#include "mozilla/net/NeckoChild.h"
#include "nsThreadUtils.h"
#include "nsSocketProviderService.h"
#include "nsISocketProvider.h"
#include "nsISSLSocketControl.h"
#include "nsIPipe.h"
#include "nsIClassInfoImpl.h"
#include "nsURLHelper.h"
#include "nsIDNSService.h"
#include "nsIDNSRecord.h"
#include "nsIDNSByTypeRecord.h"
#include "nsICancelable.h"
#include "NetworkDataCountLayer.h"
#include "QuicSocketControl.h"
#include <algorithm>
#include "sslexp.h"
#include "mozilla/net/SSLTokensCache.h"
#include "mozilla/StaticPrefs_network.h"
#include "nsPrintfCString.h"
#include "xpcpublic.h"
#if defined(FUZZING)
# include "FuzzyLayer.h"
# include "FuzzySecurityInfo.h"
# include "mozilla/StaticPrefs_fuzzing.h"
#endif
#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(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)
: Runnable("net::nsSocketEvent"),
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) {}
// 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 = std::move(mCallback);
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) {}
// 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 = std::move(mCallback);
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;
{
MutexAutoLock lock(mTransport->mLock);
if (NS_FAILED(mCondition)) return mCondition;
fd = mTransport->GetFD_Locked();
if (!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.
if ((n > 0)) {
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()
: mFD(this),
mSocketTransportService(gSocketTransportService),
mInput(this),
mOutput(this) {
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));
}
nsresult nsSocketTransport::Init(const nsTArray<nsCString>& types,
const nsACString& host, uint16_t port,
const nsACString& hostRoute,
uint16_t portRoute,
nsIProxyInfo* givenProxyInfo,
nsIDNSRecord* dnsRecord) {
nsCOMPtr<nsProxyInfo> proxyInfo;
if (givenProxyInfo) {
proxyInfo = do_QueryInterface(givenProxyInfo);
NS_ENSURE_ARG(proxyInfo);
}
if (dnsRecord) {
mExternalDNSResolution = true;
mDNSRecord = do_QueryInterface(dnsRecord);
}
// init socket type info
mOriginHost = host;
mOriginPort = port;
if (!hostRoute.IsEmpty()) {
mHost = hostRoute;
mPort = portRoute;
} else {
mHost = host;
mPort = port;
}
// A subtle check we don't enter this method more than once for the socket
// transport lifetime. Disable on TSan builds to prevent race checking, we
// don't want an atomic here for perf reasons!
#ifndef MOZ_TSAN
MOZ_ASSERT(!mPortRemappingApplied);
#endif // !MOZ_TSAN
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_LOG1(
("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"
uint32_t typeCount = types.Length() + (proxyType != nullptr);
if (!typeCount) return NS_OK;
// if we have socket types, then the socket provider service had
// better exist!
nsresult rv;
nsCOMPtr<nsISocketProviderService> spserv =
nsSocketProviderService::GetOrCreate();
if (!mTypes.SetCapacity(typeCount, fallible)) {
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 < typeCount; ++i) {
// store socket types
if (i == 0 && proxyType) {
mTypes.AppendElement(proxyType);
} else {
mTypes.AppendElement(types[type++]);
}
nsCOMPtr<nsISocketProvider> provider;
rv = spserv->GetSocketProvider(mTypes[i].get(), 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 (mTypes[i].EqualsLiteral("socks") || mTypes[i].EqualsLiteral("socks4")) {
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;
}
#if defined(XP_UNIX)
nsresult nsSocketTransport::InitWithFilename(const char* filename) {
return InitWithName(filename, strlen(filename));
}
nsresult nsSocketTransport::InitWithName(const char* name, size_t length) {
if (length > sizeof(mNetAddr.local.path) - 1) {
return NS_ERROR_FILE_NAME_TOO_LONG;
}
if (!name[0] && length > 1) {
// name is abstract address name that is supported on Linux only
# if defined(XP_LINUX)
mHost.Assign(name + 1, length - 1);
# else
return NS_ERROR_SOCKET_ADDRESS_NOT_SUPPORTED;
# endif
} else {
// The name isn't abstract socket address. So this is Unix domain
// socket that has file path.
mHost.Assign(name, length);
}
mPort = 0;
mNetAddr.local.family = AF_LOCAL;
memcpy(mNetAddr.local.path, name, length);
mNetAddr.local.path[length] = '\0';
mNetAddrIsSet = true;
return NS_OK;
}
#endif
nsresult nsSocketTransport::InitWithConnectedSocket(PRFileDesc* fd,
const NetAddr* addr) {
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
char buf[kNetAddrMaxCStrBufSize];
addr->ToStringBuffer(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);
mState = STATE_TRANSFERRING;
SetSocketName(fd);
mNetAddrIsSet = true;
{
MutexAutoLock lock(mLock);
NS_ASSERTION(!mFD.IsInitialized(), "already initialized");
mFD = fd;
mFDref = 1;
mFDconnected = true;
mPollTimeout = mTimeouts[TIMEOUT_READ_WRITE];
}
// 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_LOG1(("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();
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] "
"mProxyTransparentResolvesHost=%d\n",
this, SocketHost().get(), SocketPort(),
mConnectionFlags & nsSocketTransport::BYPASS_CACHE ? " bypass cache" : "",
mProxyTransparentResolvesHost));
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
nsresult rv;
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.EqualsLiteral("*")) {
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);
}
}
if (mExternalDNSResolution) {
MOZ_ASSERT(mDNSRecord);
mState = STATE_RESOLVING;
return PostEvent(MSG_DNS_LOOKUP_COMPLETE, NS_OK, nullptr);
}
nsCOMPtr<nsIDNSService> dns = nullptr;
auto initTask = [&dns]() { dns = do_GetService(kDNSServiceCID); };
if (!NS_IsMainThread()) {
// Forward to the main thread synchronously.
RefPtr<nsIThread> mainThread = do_GetMainThread();
if (!mainThread) {
return NS_ERROR_FAILURE;
}
SyncRunnable::DispatchToThread(
mainThread,
new SyncRunnable(NS_NewRunnableFunction(
"nsSocketTransport::ResolveHost->GetDNSService", initTask)));
} else {
initTask();
}
if (!dns) {
return NS_ERROR_FAILURE;
}
mResolving = true;
uint32_t dnsFlags = 0;
if (mConnectionFlags & nsSocketTransport::BYPASS_CACHE) {
dnsFlags = nsIDNSService::RESOLVE_BYPASS_CACHE;
}
if (mConnectionFlags & nsSocketTransport::REFRESH_CACHE) {
dnsFlags = nsIDNSService::RESOLVE_REFRESH_CACHE;
}
if (mConnectionFlags & nsSocketTransport::DISABLE_IPV6) {
dnsFlags |= nsIDNSService::RESOLVE_DISABLE_IPV6;
}
if (mConnectionFlags & nsSocketTransport::DISABLE_IPV4) {
dnsFlags |= nsIDNSService::RESOLVE_DISABLE_IPV4;
}
if (mConnectionFlags & nsSocketTransport::DISABLE_TRR) {
dnsFlags |= nsIDNSService::RESOLVE_DISABLE_TRR;
}
if (mConnectionFlags & nsSocketTransport::USE_IP_HINT_ADDRESS) {
dnsFlags |= nsIDNSService::RESOLVE_IP_HINT;
}
dnsFlags |= nsIDNSService::GetFlagsFromTRRMode(
nsISocketTransport::GetTRRModeFromFlags(mConnectionFlags));
// When we get here, we are not resolving using any configured proxy likely
// because of individual proxy setting on the request or because the host is
// excluded from proxying. Hence, force resolution despite global proxy-DNS
// configuration.
dnsFlags |= nsIDNSService::RESOLVE_IGNORE_SOCKS_DNS;
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->AsyncResolveNative(SocketHost(), nsIDNSService::RESOLVE_TYPE_DEFAULT,
dnsFlags, nullptr, this, mSocketTransportService,
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 = NS_OK;
proxyTransparent = false;
usingSSL = false;
if (mTypes.IsEmpty()) {
fd = PR_OpenTCPSocket(mNetAddr.raw.family);
if (!fd) {
SOCKET_LOG((" error creating TCP nspr socket [rv=%" PRIx32 "]\n",
static_cast<uint32_t>(rv)));
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
#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;
uint32_t controlFlags = 0;
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::BE_CONSERVATIVE) {
controlFlags |= nsISocketProvider::BE_CONSERVATIVE;
}
if (mConnectionFlags &
nsISocketTransport::ANONYMOUS_CONNECT_ALLOW_CLIENT_CERT) {
controlFlags |= nsISocketProvider::ANONYMOUS_CONNECT_ALLOW_CLIENT_CERT;
}
// 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<nsISocketProviderService> spserv =
nsSocketProviderService::GetOrCreate();
nsCOMPtr<nsIProxyInfo> proxyInfo = mProxyInfo;
uint32_t i;
for (i = 0; i < mTypes.Length(); ++i) {
nsCOMPtr<nsISocketProvider> provider;
SOCKET_LOG((" pushing io layer [%u:%s]\n", i, mTypes[i].get()));
rv = spserv->GetSocketProvider(mTypes[i].get(), getter_AddRefs(provider));
if (NS_FAILED(rv)) break;
nsCOMPtr<nsISupports> secinfo;
if (i == 0) {
// if this is the first type, we'll want the
// service to allocate a new socket
// Most layers _ESPECIALLY_ PSM want the origin name here as they
// will use it for secure checks, etc.. and any connection management
// differences between the origin name and the routed name can be
// taken care of via DNS. However, SOCKS is a special case as there is
// no DNS. in the case of SOCKS and PSM the PSM is a separate layer
// and receives the origin name.
const char* socketProviderHost = host;
int32_t socketProviderPort = port;
if (mProxyTransparentResolvesHost &&
(mTypes[0].EqualsLiteral("socks") ||
mTypes[0].EqualsLiteral("socks4"))) {
SOCKET_LOG(("SOCKS %d Host/Route override: %s:%d -> %s:%d\n",
mHttpsProxy, socketProviderHost, socketProviderPort,
mHost.get(), mPort));
socketProviderHost = mHost.get();
socketProviderPort = mPort;
}
// 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() : socketProviderHost,
mHttpsProxy ? mProxyPort : socketProviderPort, proxyInfo,
mOriginAttributes, controlFlags, mTlsFlags, &fd,
getter_AddRefs(secinfo));
if (NS_SUCCEEDED(rv) && !fd) {
MOZ_ASSERT_UNREACHABLE(
"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, mTlsFlags, 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 = mTypes[i].EqualsLiteral("ssl");
if (isSSL || mTypes[i].EqualsLiteral("starttls")) {
// 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 (mTypes[i].EqualsLiteral("socks") ||
mTypes[i].EqualsLiteral("socks4")) {
// 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].get(), static_cast<uint32_t>(rv)));
if (fd) {
CloseSocket(
fd, mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
}
}
return rv;
}
nsresult nsSocketTransport::InitiateSocket() {
SOCKET_LOG(("nsSocketTransport::InitiateSocket [this=%p]\n", this));
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
nsresult rv;
bool isLocal;
IsLocal(&isLocal);
if (gIOService->IsNetTearingDown()) {
return NS_ERROR_ABORT;
}
if (gIOService->IsOffline()) {
if (StaticPrefs::network_disable_localhost_when_offline() || !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() &&
!(mNetAddr.IsIPAddrAny() || mNetAddr.IsIPAddrLocal() ||
mNetAddr.IsIPAddrShared())) {
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());
return NS_ERROR_NON_LOCAL_CONNECTION_REFUSED;
}
}
// Hosts/Proxy Hosts that are Local IP Literals should not be speculatively
// connected - Bug 853423.
if (mConnectionFlags & nsISocketTransport::DISABLE_RFC1918 &&
mNetAddr.IsIPAddrLocal()) {
if (SOCKET_LOG_ENABLED()) {
nsAutoCString netAddrCString;
netAddrCString.SetLength(kIPv6CStrBufSize);
if (!mNetAddr.ToStringBuffer(netAddrCString.BeginWriting(),
kIPv6CStrBufSize)) {
netAddrCString = "<IP-to-string failed>"_ns;
}
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.
//
{
MutexAutoLock lock(mLock);
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;
}
// create proxy via IOActivityMonitor
IOActivityMonitor::MonitorSocket(fd);
#ifdef FUZZING
if (StaticPrefs::fuzzing_necko_enabled()) {
rv = AttachFuzzyIOLayer(fd);
if (NS_FAILED(rv)) {
SOCKET_LOG(("Failed to attach fuzzing IOLayer [rv=%" PRIx32 "].\n",
static_cast<uint32_t>(rv)));
return rv;
}
SOCKET_LOG(("Successfully attached fuzzing IOLayer.\n"));
if (usingSSL) {
mSecInfo = static_cast<nsISupports*>(
static_cast<nsISSLSocketControl*>(new FuzzySecurityInfo()));
}
}
#endif
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
// up to here, mFD will only be accessed by us
// assign mFD so that we can properly handle OnSocketDetached before we've
// established a connection.
{
MutexAutoLock lock(mLock);
// 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;
mFD = fd;
mFDref = 1;
mFDconnected = false;
mPollTimeout = mTimeouts[TIMEOUT_CONNECT];
}
SOCKET_LOG((" advancing to STATE_CONNECTING\n"));
mState = STATE_CONNECTING;
SendStatus(NS_NET_STATUS_CONNECTING_TO);
if (SOCKET_LOG_ENABLED()) {
char buf[kNetAddrMaxCStrBufSize];
mNetAddr.ToStringBuffer(buf, sizeof(buf));
SOCKET_LOG((" trying address: %s\n", buf));
}
//
// Initiate the connect() to the host...
//
PRNetAddr prAddr;
memset(&prAddr, 0, sizeof(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
nsCOMPtr<nsISSLSocketControl> secCtrl = do_QueryInterface(mSecInfo);
if (secCtrl) {
if (!mEchConfig.IsEmpty() &&
!(mConnectionFlags & (DONT_TRY_ECH | BE_CONSERVATIVE))) {
SOCKET_LOG(("nsSocketTransport::InitiateSocket set echconfig."));
rv = secCtrl->SetEchConfig(mEchConfig);
if (NS_FAILED(rv)) {
return rv;
}
mEchConfigUsed = true;
}
}
// 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();
}
if (Telemetry::CanRecordPrereleaseData() ||
Telemetry::CanRecordReleaseData()) {
if (NS_FAILED(AttachNetworkDataCountLayer(fd))) {
SOCKET_LOG(
("nsSocketTransport::InitiateSocket "
"AttachNetworkDataCountLayer failed [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) {
PR_SetFDInheritable(fd, false);
}
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 && connectCalled) {
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
if ((mConnectionFlags & nsSocketTransport::USE_IP_HINT_ADDRESS) &&
mCondition == NS_ERROR_UNKNOWN_HOST &&
(mState == MSG_DNS_LOOKUP_COMPLETE || mState == MSG_ENSURE_CONNECT)) {
SOCKET_LOG((" try again without USE_IP_HINT_ADDRESS"));
mConnectionFlags &= ~nsSocketTransport::USE_IP_HINT_ADDRESS;
mState = STATE_CLOSED;
return NS_SUCCEEDED(PostEvent(MSG_ENSURE_CONNECT, NS_OK));
}
// can only recover from errors in these states
if (mState != STATE_RESOLVING && mState != STATE_CONNECTING) {
SOCKET_LOG((" not in a recoverable state"));
return false;
}
nsresult rv;
#ifdef DEBUG
{
MutexAutoLock lock(mLock);
NS_ASSERTION(!mFDconnected, "socket should not be connected");
}
#endif
// all connection failures need to be reported to DNS so that the next
// time we will use a different address if available.
// NS_BASE_STREAM_CLOSED is not an actual connection failure, so don't report
// to DNS.
if (mState == STATE_CONNECTING && mDNSRecord &&
mCondition != NS_BASE_STREAM_CLOSED) {
mDNSRecord->ReportUnusable(SocketPort());
}
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) {
SOCKET_LOG((" not a recoverable error %" PRIx32,
static_cast<uint32_t>(mCondition)));
return false;
}
bool tryAgain = false;
if ((mState == STATE_CONNECTING) && mDNSRecord) {
if (mNetAddr.raw.family == AF_INET) {
if (mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
Telemetry::Accumulate(Telemetry::IPV4_AND_IPV6_ADDRESS_CONNECTIVITY,
UNSUCCESSFUL_CONNECTING_TO_IPV4_ADDRESS);
}
} else if (mNetAddr.raw.family == AF_INET6) {
if (mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
Telemetry::Accumulate(Telemetry::IPV4_AND_IPV6_ADDRESS_CONNECTIVITY,
UNSUCCESSFUL_CONNECTING_TO_IPV6_ADDRESS);
}
}
}
if (mConnectionFlags & RETRY_WITH_DIFFERENT_IP_FAMILY &&
mCondition == NS_ERROR_UNKNOWN_HOST && mState == STATE_RESOLVING &&
!mProxyTransparentResolvesHost) {
SOCKET_LOG((" trying lookup again with opposite ip family\n"));
mConnectionFlags ^= (DISABLE_IPV6 | DISABLE_IPV4);
mConnectionFlags &= ~RETRY_WITH_DIFFERENT_IP_FAMILY;
// This will tell the consuming half-open to reset preference on the
// connection entry
mResetFamilyPreference = true;
tryAgain = true;
}
// try next ip address only if past the resolver stage...
if (mState == STATE_CONNECTING && mDNSRecord) {
nsresult rv = mDNSRecord->GetNextAddr(SocketPort(), &mNetAddr);
mDNSRecord->IsTRR(&mResolvedByTRR);
if (NS_SUCCEEDED(rv)) {
SOCKET_LOG((" trying again with next ip address\n"));
tryAgain = true;
} else if (mExternalDNSResolution) {
mRetryDnsIfPossible = true;
bool trrEnabled;
mDNSRecord->IsTRR(&trrEnabled);
// Bug 1648147 - If the server responded with `0.0.0.0` or `::` then we
// should intentionally not fallback to regular DNS.
if (trrEnabled && !StaticPrefs::network_trr_fallback_on_zero_response() &&
((mNetAddr.raw.family == AF_INET && mNetAddr.inet.ip == 0) ||
(mNetAddr.raw.family == AF_INET6 && mNetAddr.inet6.ip.u64[0] == 0 &&
mNetAddr.inet6.ip.u64[1] == 0))) {
SOCKET_LOG((" TRR returned 0.0.0.0 and there are no other IPs"));
mRetryDnsIfPossible = false;
}
} else if (mConnectionFlags & RETRY_WITH_DIFFERENT_IP_FAMILY) {
SOCKET_LOG((" failed to connect, trying with opposite ip family\n"));
// Drop state to closed. This will trigger new round of DNS
// resolving bellow.
mState = STATE_CLOSED;
mConnectionFlags ^= (DISABLE_IPV6 | DISABLE_IPV4);
mConnectionFlags &= ~RETRY_WITH_DIFFERENT_IP_FAMILY;
// This will tell the consuming half-open to reset preference on the
// connection entry
mResetFamilyPreference = true;
tryAgain = true;
} else if (!(mConnectionFlags & DISABLE_TRR)) {
bool trrEnabled;
mDNSRecord->IsTRR(&trrEnabled);
// Bug 1648147 - If the server responded with `0.0.0.0` or `::` then we
// should intentionally not fallback to regular DNS.
if (!StaticPrefs::network_trr_fallback_on_zero_response() &&
((mNetAddr.raw.family == AF_INET && mNetAddr.inet.ip == 0) ||
(mNetAddr.raw.family == AF_INET6 && mNetAddr.inet6.ip.u64[0] == 0 &&
mNetAddr.inet6.ip.u64[1] == 0))) {
SOCKET_LOG((" TRR returned 0.0.0.0 and there are no other IPs"));
} else if (trrEnabled) {
uint32_t trrMode = 0;
mDNSRecord->GetEffectiveTRRMode(&trrMode);
// If current trr mode is trr only, we should not retry.
if (trrMode != 3) {
// Drop state to closed. This will trigger a new round of
// DNS resolving. Bypass the cache this time since the
// cached data came from TRR and failed already!
SOCKET_LOG((" failed to connect with TRR enabled, try w/o\n"));
mState = STATE_CLOSED;
mConnectionFlags |= DISABLE_TRR | BYPASS_CACHE | REFRESH_CACHE;
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);
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;
// 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;
mPollTimeout = mTimeouts[TIMEOUT_READ_WRITE];
}
// 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;
}
class ThunkPRClose : public Runnable {
public:
explicit ThunkPRClose(PRFileDesc* fd)
: Runnable("net::ThunkPRClose"), mFD(fd) {}
NS_IMETHOD Run() override {
nsSocketTransport::CloseSocket(
mFD, gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
return NS_OK;
}
private:
PRFileDesc* mFD;
};
void STS_PRCloseOnSocketTransport(PRFileDesc* fd, bool lingerPolarity,
int16_t lingerTimeout) {
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");
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 (mLingerPolarity || mLingerTimeout) {
PRSocketOptionData socket_linger;
socket_linger.option = PR_SockOpt_Linger;
socket_linger.value.linger.polarity = mLingerPolarity;
socket_linger.value.linger.linger = mLingerTimeout;
PR_SetSocketOption(mFD, &socket_linger);
}
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, mLingerPolarity, mLingerTimeout);
}
}
mFD = nullptr;
}
}
//-----------------------------------------------------------------------------
// socket event handler impl
void nsSocketTransport::OnSocketEvent(uint32_t type, nsresult status,
nsISupports* param) {
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
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"));
// Apply port remapping here so that we do it on the socket thread and
// before we process the resolved DNS name or create the socket the first
// time.
if (!mPortRemappingApplied) {
mPortRemappingApplied = true;
mSocketTransportService->ApplyPortRemap(&mPort);
mSocketTransportService->ApplyPortRemap(&mOriginPort);
}
//
// 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 {
#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 (mDNSRecord) {
mDNSRecord->GetNextAddr(SocketPort(), &mNetAddr);
mDNSRecord->IsTRR(&mResolvedByTRR);
}
// 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"));
{
MutexAutoLock lock(mLock);
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) {
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
SOCKET_LOG1(("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) {
// 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
{
MutexAutoLock lock(mLock);
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 (mNetAddr.raw.family == AF_INET) {
if (mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
Telemetry::Accumulate(Telemetry::IPV4_AND_IPV6_ADDRESS_CONNECTIVITY,
SUCCESSFUL_CONNECTING_TO_IPV4_ADDRESS);
}
} else if (mNetAddr.raw.family == AF_INET6) {
if (mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
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
{
MutexAutoLock lock(mLock);
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");
mAttached = false;
// 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;
}
}
// If we are not shutting down try again.
if (!gIOService->IsNetTearingDown() && RecoverFromError()) {
mCondition = NS_OK;
} else {
mState = STATE_CLOSED;
// 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);
}
// 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;
}
// 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 = mNetAddr.IsLoopbackAddr();
}
}
//-----------------------------------------------------------------------------
// 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** aResult) {
SOCKET_LOG(
("nsSocketTransport::OpenInputStream [this=%p flags=%x]\n", this, flags));
NS_ENSURE_TRUE(!mInput.IsReferenced(), NS_ERROR_UNEXPECTED);
nsresult rv;
nsCOMPtr<nsIAsyncInputStream> pipeIn;
nsCOMPtr<nsIInputStream> result;
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;
}
result.forget(aResult);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::OpenOutputStream(uint32_t flags, uint32_t segsize,
uint32_t segcount,
nsIOutputStream** aResult) {
SOCKET_LOG(("nsSocketTransport::OpenOutputStream [this=%p flags=%x]\n", this,
flags));
NS_ENSURE_TRUE(!mOutput.IsReferenced(), NS_ERROR_UNEXPECTED);
nsresult rv;
nsCOMPtr<nsIAsyncOutputStream> pipeOut;
nsCOMPtr<nsIOutputStream> result;
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;
result.forget(aResult);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::Close(nsresult reason) {
SOCKET_LOG(("nsSocketTransport::Close %p reason=%" PRIx32, this,
static_cast<uint32_t>(reason)));
if (NS_SUCCEEDED(reason)) reason = NS_BASE_STREAM_CLOSED;
mDoNotRetryToConnect = true;
mInput.CloseWithStatus(reason);
mOutput.CloseWithStatus(reason);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetSecurityInfo(nsISupports** secinfo) {
MutexAutoLock lock(mLock);
*secinfo = do_AddRef(mSecInfo).take();
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetSecurityCallbacks(nsIInterfaceRequestor** callbacks) {
MutexAutoLock lock(mLock);
*callbacks = do_AddRef(mCallbacks).take();
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetSecurityCallbacks(nsIInterfaceRequestor* callbacks) {
nsCOMPtr<nsIInterfaceRequestor> threadsafeCallbacks;
NS_NewNotificationCallbacksAggregation(callbacks, nullptr,
GetCurrentEventTarget(),
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;
nsresult conditionWhileLocked = NS_OK;
PRFileDescAutoLock fd(this, &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::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);
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
if (mAttached) {
return NS_ERROR_FAILURE;
}
mBindAddr = MakeUnique<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;
RefPtr<nsNetAddr> netaddr = new nsNetAddr(&rawAddr);
netaddr.forget(addr);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetScriptableSelfAddr(nsINetAddr** addr) {
NetAddr rawAddr;
nsresult rv;
rv = GetSelfAddr(&rawAddr);
if (NS_FAILED(rv)) return rv;
RefPtr<nsNetAddr> netaddr = new nsNetAddr(&rawAddr);
netaddr.forget(addr);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetTimeout(uint32_t type, uint32_t* value) {
NS_ENSURE_ARG_MAX(type, nsISocketTransport::TIMEOUT_READ_WRITE);
MutexAutoLock lock(mLock);
*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);
SOCKET_LOG(("nsSocketTransport::SetTimeout %p type=%u, value=%u", this, type,
value));
// truncate overly large timeout values.
{
MutexAutoLock lock(mLock);
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::SetLinger(bool aPolarity, int16_t aTimeout) {
MutexAutoLock lock(mLock);
mLingerPolarity = aPolarity;
mLingerTimeout = aTimeout;
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);
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);
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);
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);
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) {
SOCKET_LOG(("nsSocketTransport::OnLookupComplete: this=%p status %" PRIx32
".",
this, static_cast<uint32_t>(status)));
if (NS_SUCCEEDED(status)) {
mDNSRecord = do_QueryInterface(rec);
MOZ_ASSERT(mDNSRecord);
}
// flag host lookup complete for the benefit of the ResolveHost method.
mResolving = false;
nsresult rv = PostEvent(MSG_DNS_LOOKUP_COMPLETE, status, nullptr);
// 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)) ||
iid.Equals(NS_GET_IID(nsIDNSAddrRecord))) {
return mDNSRecord ? mDNSRecord->QueryInterface(iid, result)
: NS_ERROR_NO_INTERFACE;
}
return this->QueryInterface(iid, result);
}
NS_IMETHODIMP
nsSocketTransport::GetInterfaces(nsTArray<nsIID>& array) {
return NS_CI_INTERFACE_GETTER_NAME(nsSocketTransport)(array);
}
NS_IMETHODIMP
nsSocketTransport::GetScriptableHelper(nsIXPCScriptable** _retval) {
*_retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetContractID(nsACString& aContractID) {
aContractID.SetIsVoid(true);
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetClassDescription(nsACString& aClassDescription) {
aClassDescription.SetIsVoid(true);
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) {
SOCKET_LOG(
("nsSocketTransport::SetConnectionFlags %p flags=%u", this, value));
mConnectionFlags = value;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetIsPrivate(bool aIsPrivate) {
mIsPrivate = aIsPrivate;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetTlsFlags(uint32_t* value) {
*value = mTlsFlags;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetTlsFlags(uint32_t value) {
mTlsFlags = value;
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);
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);
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();
char* errMessage;
FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, errCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR)&errMessage, 0, NULL);
NS_WARNING(nsPrintfCString("%s [%p] OS error[0x%lx] %s",
aPrefix ? aPrefix : "nsSocketTransport", aObjPtr,
errCode,
errMessage ? errMessage : "<no error text>")
.get());
LocalFree(errMessage);
# else
int errCode = errno;
char* errMessage = strerror(errno);
NS_WARNING(nsPrintfCString("%s [%p] OS error[0x%x] %s",
aPrefix ? aPrefix : "nsSocketTransport", aObjPtr,
errCode,
errMessage ? errMessage : "<no error text>")
.get());
# 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::GetResetIPFamilyPreference(bool* aReset) {
*aReset = mResetFamilyPreference;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetEchConfigUsed(bool* aEchConfigUsed) {
*aEchConfigUsed = mEchConfigUsed;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::SetEchConfig(const nsACString& aEchConfig) {
mEchConfig = aEchConfig;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::ResolvedByTRR(bool* aResolvedByTRR) {
*aResolvedByTRR = mResolvedByTRR;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetRetryDnsIfPossible(bool* aRetryDns) {
*aRetryDns = mRetryDnsIfPossible;
return NS_OK;
}
NS_IMETHODIMP
nsSocketTransport::GetStatus(nsresult* aStatus) {
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
*aStatus = mCondition;
return NS_OK;
}
} // namespace net
} // namespace mozilla
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