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/* 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/. */
/**
* LSPs are evil little bits of code that are allowed to inject into our
* networking stack by Windows. Once they have wormed into our process
* they gnaw at our innards until we crash. Here we force the buggers
* into the light by recording them in our crash information.
* We do the enumeration on a thread because I'm concerned about startup perf
* on machines with several LSPs.
*/
#if _WIN32_WINNT < 0x0600
// Redefining _WIN32_WINNT for some Vista APIs that we call
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0600
#endif
#include "nsICrashReporter.h"
#include "nsISupportsImpl.h"
#include "nsServiceManagerUtils.h"
#include "nsThreadUtils.h"
#include "nsQueryObject.h"
#include "nsWindowsHelpers.h"
#include <windows.h>
#include <rpc.h>
#include <ws2spi.h>
namespace mozilla {
namespace crashreporter {
class LSPAnnotationGatherer : public Runnable
{
~LSPAnnotationGatherer() {}
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIRUNNABLE
void Annotate();
nsCString mString;
nsCOMPtr<nsIThread> mThread;
};
NS_IMPL_ISUPPORTS(LSPAnnotationGatherer, nsIRunnable)
void
LSPAnnotationGatherer::Annotate()
{
nsCOMPtr<nsICrashReporter> cr =
do_GetService("@mozilla.org/toolkit/crash-reporter;1");
bool enabled;
if (cr && NS_SUCCEEDED(cr->GetEnabled(&enabled)) && enabled) {
cr->AnnotateCrashReport(NS_LITERAL_CSTRING("Winsock_LSP"), mString);
}
mThread->AsyncShutdown();
}
NS_IMETHODIMP
LSPAnnotationGatherer::Run()
{
PR_SetCurrentThreadName("LSP Annotator");
mThread = NS_GetCurrentThread();
DWORD size = 0;
int err;
// Get the size of the buffer we need
if (SOCKET_ERROR != WSCEnumProtocols(nullptr, nullptr, &size, &err) ||
err != WSAENOBUFS) {
// Er, what?
NS_NOTREACHED("WSCEnumProtocols suceeded when it should have failed ...");
return NS_ERROR_FAILURE;
}
auto byteArray = MakeUnique<char[]>(size);
WSAPROTOCOL_INFOW* providers =
reinterpret_cast<WSAPROTOCOL_INFOW*>(byteArray.get());
int n = WSCEnumProtocols(nullptr, providers, &size, &err);
if (n == SOCKET_ERROR) {
// Lame. We provided the right size buffer; we'll just give up now.
NS_WARNING("Could not get LSP list");
return NS_ERROR_FAILURE;
}
nsCString str;
for (int i = 0; i < n; i++) {
AppendUTF16toUTF8(nsDependentString(providers[i].szProtocol), str);
str.AppendLiteral(" : ");
str.AppendInt(providers[i].iVersion);
str.AppendLiteral(" : ");
str.AppendInt(providers[i].iAddressFamily);
str.AppendLiteral(" : ");
str.AppendInt(providers[i].iSocketType);
str.AppendLiteral(" : ");
str.AppendInt(providers[i].iProtocol);
str.AppendLiteral(" : ");
str.AppendPrintf("0x%x", providers[i].dwServiceFlags1);
str.AppendLiteral(" : ");
str.AppendPrintf("0x%x", providers[i].dwProviderFlags);
str.AppendLiteral(" : ");
wchar_t path[MAX_PATH];
int pathLen = MAX_PATH;
if (!WSCGetProviderPath(&providers[i].ProviderId, path, &pathLen, &err)) {
AppendUTF16toUTF8(nsDependentString(path), str);
}
str.AppendLiteral(" : ");
// If WSCGetProviderInfo is available, we should call it to obtain the
// category flags for this provider. When present, these flags inform
// Windows as to which order to chain the providers.
nsModuleHandle ws2_32(LoadLibraryW(L"ws2_32.dll"));
if (ws2_32) {
decltype(WSCGetProviderInfo)* pWSCGetProviderInfo =
reinterpret_cast<decltype(WSCGetProviderInfo)*>(
GetProcAddress(ws2_32, "WSCGetProviderInfo"));
if (pWSCGetProviderInfo) {
DWORD categoryInfo;
size_t categoryInfoSize = sizeof(categoryInfo);
if (!pWSCGetProviderInfo(&providers[i].ProviderId,
ProviderInfoLspCategories,
(PBYTE)&categoryInfo, &categoryInfoSize, 0,
&err)) {
str.AppendPrintf("0x%x", categoryInfo);
}
}
}
str.AppendLiteral(" : ");
if (providers[i].ProtocolChain.ChainLen <= BASE_PROTOCOL) {
// If we're dealing with a catalog entry that identifies an individual
// base or layer provider, log its provider GUID.
RPC_CSTR provIdStr = nullptr;
if (UuidToStringA(&providers[i].ProviderId, &provIdStr) == RPC_S_OK) {
str.Append(reinterpret_cast<char*>(provIdStr));
RpcStringFreeA(&provIdStr);
}
}
if (i + 1 != n) {
str.AppendLiteral(" \n ");
}
}
mString = str;
NS_DispatchToMainThread(NewRunnableMethod(this, &LSPAnnotationGatherer::Annotate));
return NS_OK;
}
void LSPAnnotate()
{
nsCOMPtr<nsIThread> thread;
nsCOMPtr<nsIRunnable> runnable =
do_QueryObject(new LSPAnnotationGatherer());
NS_NewThread(getter_AddRefs(thread), runnable);
}
} // namespace crashreporter
} // namespace mozilla
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