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winws: fix error messages and error code in windivert init

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This commit is contained in:
bol-van 2024-05-01 19:02:28 +03:00
parent da1226ceee
commit a145fe73fe
5 changed files with 12 additions and 7 deletions
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binaries/win64/winws.exe
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binaries/win64/zapret-winws/winws.exe
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15
nfq/darkmagic.c
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@ -959,6 +959,7 @@ void tcp_rewrite_winsize(struct tcphdr *tcp, uint16_t winsize, uint8_t scale_fac
static HANDLE w_filter = NULL;
static OVERLAPPED ovl = { .hEvent = NULL };
DWORD w_win32_error=0;
static HANDLE windivert_init_filter(const char *filter, UINT64 flags)
{
@ -971,24 +972,25 @@ static HANDLE windivert_init_filter(const char *filter, UINT64 flags)
hMutex = CreateMutexA(NULL,TRUE,mutex_name);
if (hMutex && GetLastError()==ERROR_ALREADY_EXISTS)
WaitForSingleObject(hMutex,INFINITE);
h = WinDivertOpen(filter, WINDIVERT_LAYER_NETWORK, 0, flags);
w_win32_error = GetLastError();
if (hMutex)
{
ReleaseMutex(hMutex);
CloseHandle(hMutex);
SetLastError(w_win32_error);
}
if (h != INVALID_HANDLE_VALUE) return h;
errorcode = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, errorcode, MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT), (LPTSTR)&errormessage, 0, NULL);
NULL, w_win32_error, MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT), (LPTSTR)&errormessage, 0, NULL);
fprintf(stderr, "windivert: error opening filter: %s", errormessage);
LocalFree(errormessage);
if (errorcode == 577)
if (w_win32_error == ERROR_INVALID_IMAGE_HASH)
fprintf(stderr,"windivert: try to disable secure boot and install OS patches\n");
return NULL;
}
void rawsend_cleanup(void)
@ -1014,6 +1016,7 @@ bool windivert_init(const char *filter)
ovl.hEvent = CreateEventW(NULL,FALSE,FALSE,NULL);
if (!ovl.hEvent)
{
w_win32_error = GetLastError();
rawsend_cleanup();
return false;
}
@ -1041,8 +1044,8 @@ static bool windivert_recv_filter(HANDLE hFilter, uint8_t *packet, size_t *len,
}
for(;;)
{
err = GetLastError();
switch(err)
w_win32_error = GetLastError();
switch(w_win32_error)
{
case ERROR_IO_PENDING:
// make signals working

2
nfq/darkmagic.h
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@ -149,6 +149,8 @@ uint8_t tcp_find_scale_factor(const struct tcphdr *tcp);
bool tcp_has_fastopen(const struct tcphdr *tcp);
#ifdef __CYGWIN__
extern DWORD w_win32_error;
bool windivert_init(const char *filter);
bool windivert_recv(uint8_t *packet, size_t *len, WINDIVERT_ADDRESS *wa);
bool windivert_send(const uint8_t *packet, size_t len, const WINDIVERT_ADDRESS *wa);

2
nfq/nfqws.c
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@ -411,7 +411,7 @@ static int win_main(const char *windivert_filter)
char ifout[22];
if (!windivert_init(windivert_filter))
return 1;
return w_win32_error;
printf("windivert initialized. capture is started.\n");