suricata
source-windivert.h
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1 /* Copyright (C) 2018 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  *
20  * \file
21  *
22  * \author Jacob Masen-Smith <jacob@evengx.com>
23  *
24  */
25 
26 #ifndef __SOURCE_WINDIVERT_H__
27 #define __SOURCE_WINDIVERT_H__
28 
29 #ifdef WINDIVERT
30 
31 #include "windivert.h"
32 
33 #define WINDIVERT_FILTER_MAXLEN 128 /* from windivert_device.h */
34 
35 typedef void *WinDivertHandle;
36 
37 /**
38  * \brief WinDivertQueueVars is the queue configuration and other miscellaneous
39  * information about the specific queue/filter.
40  *
41  * see https://reqrypt.org/windivert-doc.html#divert_open for more info
42  */
43 typedef struct WinDivertQueueVars_
44 {
45  int queue_num;
46 
47  /* see https://reqrypt.org/windivert-doc.html#filter_language */
48  char filter_str[WINDIVERT_FILTER_MAXLEN + 1];
49  WINDIVERT_LAYER layer;
50  int16_t priority;
51  uint64_t flags;
52 
53  WinDivertHandle filter_handle;
54  /* only needed for setup/teardown; Recv/Send are internally synchronized */
55  SCMutex filter_init_mutex;
56 
57  /* counters */
58  uint32_t pkts;
59  uint64_t bytes;
60  uint32_t errs;
61  uint32_t accepted;
62  uint32_t dropped;
63  uint32_t replaced;
64  SCMutex counters_mutex;
65 } WinDivertQueueVars;
66 
67 typedef struct WinDivertPacketVars_
68 {
69  int thread_num;
70 
71  WINDIVERT_ADDRESS addr;
72  bool verdicted;
73 } WinDivertPacketVars;
74 
75 int WinDivertRegisterQueue(bool forward, char *filter_str);
76 void *WinDivertGetThread(int thread);
77 void *WinDivertGetQueue(int queue);
78 
79 void SourceWinDivertRegisterTests(void);
80 
81 #endif /* WINDIVERT */
82 #endif /* __SOURCE_WINDIVERT_H__ */
uint16_t flags
#define SCMutex