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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.
*/
#include "nsExceptionHandler.h"
#include "nsISupportsImpl.h"
#include "nsThreadUtils.h"
#include <rpc.h>
#include <ws2spi.h>
namespace mozilla {
namespace crashreporter {
class LSPAnnotationGatherer : public Runnable {
~LSPAnnotationGatherer() {}
public:
LSPAnnotationGatherer() : Runnable("crashreporter::LSPAnnotationGatherer") {}
NS_DECL_NSIRUNNABLE
void Annotate();
nsCString mString;
};
void LSPAnnotationGatherer::Annotate() {
(void)CrashReporter::RecordAnnotationNSCString(
CrashReporter::Annotation::Winsock_LSP, mString);
}
NS_IMETHODIMP
LSPAnnotationGatherer::Run() {
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?
MOZ_ASSERT_UNREACHABLE(
"WSCEnumProtocols succeeded 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%lx", providers[i].dwServiceFlags1);
str.AppendLiteral(" : ");
str.AppendPrintf("0x%lx", 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(" : ");
// Call WSCGetProviderInfo to obtain the category flags for this provider.
// When present, these flags inform Windows as to which order to chain the
// providers.
DWORD categoryInfo;
size_t categoryInfoSize = sizeof(categoryInfo);
if (!WSCGetProviderInfo(&providers[i].ProviderId, ProviderInfoLspCategories,
(PBYTE)&categoryInfo, &categoryInfoSize, 0, &err)) {
str.AppendPrintf("0x%lx", 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("crashreporter::LSPAnnotationGatherer::Annotate", this,
&LSPAnnotationGatherer::Annotate));
return NS_OK;
}
void LSPAnnotate() {
MOZ_ASSERT(XRE_IsParentProcess());
nsCOMPtr<nsIRunnable> runnable(new LSPAnnotationGatherer());
NS_DispatchBackgroundTask(runnable.forget());
}
} // namespace crashreporter
} // namespace mozilla
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