Max/basil00_WinDivert
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 21 Wiki Activity

Loopback packets are now considered outbound only

Browse Source 
Workaround for #17
This commit is contained in:
basil00
2017-11-01 20:47:45 +08:00
parent 4c4f586f4d
commit 9ae77eb7a5
1 changed files with 12 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
sys/windivert.c
+12 -4
View File
@@ -419,7 +419,7 @@ static void windivert_classify_forward_network_v6_callout(
OUT FWPS_CLASSIFY_OUT0 *result);
static void windivert_classify_callout(context_t context, IN UINT8 direction,
IN UINT32 if_idx, IN UINT32 sub_if_idx, IN BOOL isipv4,
IN BOOL isloopback, IN UINT advance, IN OUT void *data,
IN BOOL loopback, IN UINT advance, IN OUT void *data,
IN UINT64 flow_context, OUT FWPS_CLASSIFY_OUT0 *result);
static BOOL windivert_queue_packet(context_t context, PNET_BUFFER buffer,
UINT8 direction, UINT32 if_idx, UINT32 sub_if_idx, BOOL is_ipv4, BOOL hop,
@@ -2351,7 +2351,7 @@ static void windivert_classify_forward_network_v6_callout(
* WinDivert classify callout.
*/
static void windivert_classify_callout(context_t context, IN UINT8 direction,
IN UINT32 if_idx, IN UINT32 sub_if_idx, IN BOOL isipv4, IN BOOL isloopback,
IN UINT32 if_idx, IN UINT32 sub_if_idx, IN BOOL isipv4, IN BOOL loopback,
IN UINT advance, IN OUT void *data, IN UINT64 flow_context,
OUT FWPS_CLASSIFY_OUT0 *result)
{
@@ -2430,10 +2430,16 @@ static void windivert_classify_callout(context_t context, IN UINT8 direction,
hop = TRUE;
}
timestamp = KeQueryPerformanceCounter(NULL).QuadPart;
// Loopback packets are considered outbound only.
if (loopback && direction == WINDIVERT_DIRECTION_INBOUND)
{
WdfObjectDereference(object);
result->actionType = FWP_ACTION_CONTINUE;
return;
}
// Determine which checksum fields are present or not.
if (isloopback)
if (loopback)
{
// Loopback packets appear to have bogus checksums, so do not trust.
checksums = 0;
@@ -2456,6 +2462,8 @@ static void windivert_classify_callout(context_t context, IN UINT8 direction,
checksums &= ~WINDIVERT_IP_CHECKSUM;
}
timestamp = KeQueryPerformanceCounter(NULL).QuadPart;
// Retreat the NET_BUFFER to the IP header, if necessary.
// If (advance != 0) then this must be in the inbound path, and the
// NET_BUFFER_LIST must contain exactly one NET_BUFFER.