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Fix crash on error (free→LocalFree) and print KB3033929 message

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ValdikSS 2018-01-21 01:28:17 +03:00
parent f638e23ab6
commit 5eddb5f18a
1 changed files with 18 additions and 6 deletions
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24
goodbyedpi.c
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@ -15,9 +15,7 @@
#include "dnsredir.h" #include "dnsredir.h"
#include "blackwhitelist.h" #include "blackwhitelist.h"
#define die() do { printf("Something went wrong!\n" \ #define die() do { sleep(20); exit(EXIT_FAILURE); } while (0)
"Make sure you're running this program with administrator privileges\n"); \
sleep(10); exit(EXIT_FAILURE); } while (0)
#define MAX_FILTERS 4 #define MAX_FILTERS 4
#define MAX_PACKET_SIZE 9016 #define MAX_PACKET_SIZE 9016
@ -126,15 +124,27 @@ static char* dumb_memmem(const char* haystack, int hlen, const char* needle, int
static HANDLE init(char *filter, UINT64 flags) { static HANDLE init(char *filter, UINT64 flags) {
LPTSTR errormessage = NULL; LPTSTR errormessage = NULL;
DWORD errorcode = 0;
filter = WinDivertOpen(filter, WINDIVERT_LAYER_NETWORK, 0, flags); filter = WinDivertOpen(filter, WINDIVERT_LAYER_NETWORK, 0, flags);
if (filter != INVALID_HANDLE_VALUE) if (filter != INVALID_HANDLE_VALUE)
return filter; return filter;
errorcode = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS, FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT), NULL, errorcode, MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT),
(LPTSTR)&errormessage, 0, NULL); (LPTSTR)&errormessage, 0, NULL);
puts(errormessage); printf("Error opening filter: %s", errormessage);
free(errormessage); LocalFree(errormessage);
if (errorcode == 577)
printf("Windows Server 2016 systems must have secure boot disabled to be "
"able to load WinDivert driver.\n"
"Windows 7 systems must be up-to-date or at least have KB3033929 installed.\n"
"https://www.microsoft.com/en-us/download/details.aspx?id=46078\n\n"
"WARNING! If you see this error on Windows 7, it means your system is horribly "
"outdated and SHOULD NOT BE USED TO ACCESS THE INTERNET!\n"
"Most probably, you don't have security patches installed and anyone in you LAN or "
"public Wi-Fi network can get full access to your computer (MS17-010 and others).\n"
"You should install updates IMMEDIATELY.\n");
return NULL; return NULL;
} }
@ -474,6 +484,8 @@ int main(int argc, char *argv[]) {
"(tcp.SrcPort == 443 or tcp.SrcPort == 80) and tcp.Rst and " "(tcp.SrcPort == 443 or tcp.SrcPort == 80) and tcp.Rst and "
DIVERT_NO_LOCALNETS_SRC, DIVERT_NO_LOCALNETS_SRC,
WINDIVERT_FLAG_DROP); WINDIVERT_FLAG_DROP);
if (filters[filter_num] == NULL)
die();
filter_num++; filter_num++;
} }