suricata
detect-http-client-body.c
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1 /* Copyright (C) 2007-2021 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  * \ingroup httplayer
20  *
21  * @{
22  */
23 
24 
25 /**
26  * \file
27  *
28  * \author Anoop Saldanha <anoopsaldanha@gmail.com>
29  *
30  * Implements support for the http_client_body keyword
31  */
32 
33 #include "suricata-common.h"
34 #include "threads.h"
35 #include "decode.h"
36 
37 #include "detect.h"
38 #include "detect-parse.h"
39 #include "detect-engine.h"
40 #include "detect-engine-mpm.h"
41 #include "detect-engine-state.h"
44 #include "detect-content.h"
45 #include "detect-pcre.h"
46 // PrefilterMpmFiledata
47 #include "detect-file-data.h"
48 
49 #include "flow.h"
50 #include "flow-var.h"
51 #include "flow-util.h"
52 
53 #include "util-debug.h"
54 #include "util-unittest.h"
55 #include "util-unittest-helper.h"
56 #include "util-spm.h"
57 
58 #include "app-layer.h"
59 #include "app-layer-parser.h"
60 #include "app-layer-htp.h"
62 #include "stream-tcp.h"
63 #include "util-profiling.h"
64 
65 static int DetectHttpClientBodySetup(DetectEngineCtx *, Signature *, const char *);
66 static int DetectHttpClientBodySetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str);
67 #ifdef UNITTESTS
68 static void DetectHttpClientBodyRegisterTests(void);
69 #endif
70 static void DetectHttpClientBodySetupCallback(const DetectEngineCtx *de_ctx,
71  Signature *s);
72 static int g_http_client_body_buffer_id = 0;
73 
74 static uint8_t DetectEngineInspectBufferHttpBody(DetectEngineCtx *de_ctx,
76  const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id);
77 
78 static int PrefilterMpmHttpRequestBodyRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
79  MpmCtx *mpm_ctx, const DetectBufferMpmRegistry *mpm_reg, int list_id);
80 
81 /**
82  * \brief Registers the keyword handlers for the "http_client_body" keyword.
83  */
85 {
86  /* http_client_body content modifier */
87  sigmatch_table[DETECT_AL_HTTP_CLIENT_BODY].name = "http_client_body";
88  sigmatch_table[DETECT_AL_HTTP_CLIENT_BODY].desc = "content modifier to match only on HTTP request-body";
89  sigmatch_table[DETECT_AL_HTTP_CLIENT_BODY].url = "/rules/http-keywords.html#http-client-body";
90  sigmatch_table[DETECT_AL_HTTP_CLIENT_BODY].Setup = DetectHttpClientBodySetup;
91 #ifdef UNITTESTS
93 #endif
97 
98  /* http.request_body sticky buffer */
99  sigmatch_table[DETECT_HTTP_REQUEST_BODY].name = "http.request_body";
100  sigmatch_table[DETECT_HTTP_REQUEST_BODY].desc = "sticky buffer to match the HTTP request body buffer";
101  sigmatch_table[DETECT_HTTP_REQUEST_BODY].url = "/rules/http-keywords.html#http-client-body";
102  sigmatch_table[DETECT_HTTP_REQUEST_BODY].Setup = DetectHttpClientBodySetupSticky;
105 
107  HTP_REQUEST_BODY, DetectEngineInspectBufferHttpBody, NULL);
108 
109  DetectAppLayerMpmRegister("http_client_body", SIG_FLAG_TOSERVER, 2,
110  PrefilterMpmHttpRequestBodyRegister, NULL, ALPROTO_HTTP1, HTP_REQUEST_BODY);
111 
113  HTTP2StateDataClient, DetectEngineInspectFiledata, NULL);
114  DetectAppLayerMpmRegister("http_client_body", SIG_FLAG_TOSERVER, 2,
115  PrefilterMpmFiledataRegister, NULL, ALPROTO_HTTP2, HTTP2StateDataClient);
116 
117  DetectBufferTypeSetDescriptionByName("http_client_body",
118  "http request body");
119 
120  DetectBufferTypeRegisterSetupCallback("http_client_body",
121  DetectHttpClientBodySetupCallback);
122 
123  g_http_client_body_buffer_id = DetectBufferTypeGetByName("http_client_body");
124 }
125 
126 static void DetectHttpClientBodySetupCallback(const DetectEngineCtx *de_ctx,
127  Signature *s)
128 {
129  SCLogDebug("callback invoked by %u", s->id);
131 
132  /* client body needs to be inspected in sync with stream if possible */
134 }
135 
136 /**
137  * \brief The setup function for the http_client_body keyword for a signature.
138  *
139  * \param de_ctx Pointer to the detection engine context.
140  * \param s Pointer to signature for the current Signature being parsed
141  * from the rules.
142  * \param m Pointer to the head of the SigMatchs for the current rule
143  * being parsed.
144  * \param arg Pointer to the string holding the keyword value.
145  *
146  * \retval 0 On success
147  * \retval -1 On failure
148  */
149 int DetectHttpClientBodySetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
150 {
152  g_http_client_body_buffer_id, ALPROTO_HTTP1);
153 }
154 
155 /**
156  * \brief this function setup the http.request_body keyword used in the rule
157  *
158  * \param de_ctx Pointer to the Detection Engine Context
159  * \param s Pointer to the Signature to which the current keyword belongs
160  * \param str Should hold an empty string always
161  *
162  * \retval 0 On success
163  */
164 static int DetectHttpClientBodySetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str)
165 {
166  if (DetectBufferSetActiveList(de_ctx, s, g_http_client_body_buffer_id) < 0)
167  return -1;
169  return -1;
170  return 0;
171 }
172 
173 static inline HtpBody *GetRequestBody(htp_tx_t *tx)
174 {
175  HtpTxUserData *htud = (HtpTxUserData *)htp_tx_get_user_data(tx);
176  if (htud == NULL) {
177  SCLogDebug("no htud");
178  return NULL;
179  }
180 
181  return &htud->request_body;
182 }
183 
185  int list_id;
187  const MpmCtx *mpm_ctx;
190 
191 static void PrefilterMpmHttpRequestBodyFree(void *ptr)
192 {
193  SCFree(ptr);
194 }
195 
196 static inline InspectionBuffer *HttpRequestBodyXformsGetDataCallback(DetectEngineThreadCtx *det_ctx,
197  const DetectEngineTransforms *transforms, const int list_id, InspectionBuffer *base_buffer)
198 {
199  InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
200  if (buffer->inspect != NULL)
201  return buffer;
202 
203  InspectionBufferSetup(det_ctx, list_id, buffer, base_buffer->inspect, base_buffer->inspect_len);
204  buffer->inspect_offset = base_buffer->inspect_offset;
205  InspectionBufferApplyTransforms(buffer, transforms);
206  SCLogDebug("xformed buffer %p size %u", buffer, buffer->inspect_len);
207  SCReturnPtr(buffer, "InspectionBuffer");
208 }
209 
210 static InspectionBuffer *HttpRequestBodyGetDataCallback(DetectEngineThreadCtx *det_ctx,
211  const DetectEngineTransforms *transforms, Flow *f, const uint8_t flow_flags, void *txv,
212  const int list_id, const int base_id)
213 {
214  SCEnter();
215 
216  InspectionBuffer *buffer = InspectionBufferGet(det_ctx, base_id);
217  if (base_id != list_id && buffer->inspect != NULL)
218  return HttpRequestBodyXformsGetDataCallback(det_ctx, transforms, list_id, buffer);
219  else if (buffer->inspect != NULL)
220  return buffer;
221 
222  htp_tx_t *tx = txv;
223  HtpState *htp_state = f->alstate;
224  const uint8_t flags = flow_flags;
225 
226  HtpBody *body = GetRequestBody(tx);
227  if (body == NULL) {
228  return NULL;
229  }
230 
231  /* no new data */
232  if (body->body_inspected == body->content_len_so_far) {
233  SCLogDebug("no new data");
234  return NULL;
235  }
236 
237  HtpBodyChunk *cur = body->first;
238  if (cur == NULL) {
239  SCLogDebug("No http chunks to inspect for this transaction");
240  return NULL;
241  }
242 
243  SCLogDebug("request.body_limit %u request_body.content_len_so_far %" PRIu64
244  ", request.inspect_min_size %" PRIu32 ", EOF %s, progress > body? %s",
245  htp_state->cfg->request.body_limit, body->content_len_so_far,
246  htp_state->cfg->request.inspect_min_size, flags & STREAM_EOF ? "true" : "false",
248  HTP_REQUEST_BODY)
249  ? "true"
250  : "false");
251 
252  if (!htp_state->cfg->http_body_inline) {
253  /* inspect the body if the transfer is complete or we have hit
254  * our body size limit */
255  if ((htp_state->cfg->request.body_limit == 0 ||
256  body->content_len_so_far < htp_state->cfg->request.body_limit) &&
257  body->content_len_so_far < htp_state->cfg->request.inspect_min_size &&
258  !(AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, tx, flags) >
259  HTP_REQUEST_BODY) &&
260  !(flags & STREAM_EOF)) {
261  SCLogDebug("we still haven't seen the entire request body. "
262  "Let's defer body inspection till we see the "
263  "entire body.");
264  return NULL;
265  }
266  }
267 
268  /* get the inspect buffer
269  *
270  * make sure that we have at least the configured inspect_win size.
271  * If we have more, take at least 1/4 of the inspect win size before
272  * the new data.
273  */
274  uint64_t offset = 0;
275  if (body->body_inspected > htp_state->cfg->request.inspect_min_size) {
277  uint64_t inspect_win = body->content_len_so_far - body->body_inspected;
278  SCLogDebug("inspect_win %"PRIu64, inspect_win);
279  if (inspect_win < htp_state->cfg->request.inspect_window) {
280  uint64_t inspect_short = htp_state->cfg->request.inspect_window - inspect_win;
281  if (body->body_inspected < inspect_short)
282  offset = 0;
283  else
284  offset = body->body_inspected - inspect_short;
285  } else {
286  offset = body->body_inspected - (htp_state->cfg->request.inspect_window / 4);
287  }
288  }
289 
290  const uint8_t *data;
291  uint32_t data_len;
292 
294  &data, &data_len, offset);
295  InspectionBufferSetup(det_ctx, base_id, buffer, data, data_len);
296  buffer->inspect_offset = offset;
297  body->body_inspected = body->content_len_so_far;
298  SCLogDebug("body->body_inspected now: %" PRIu64, body->body_inspected);
299 
300  if (base_id != list_id) {
301  buffer = HttpRequestBodyXformsGetDataCallback(det_ctx, transforms, list_id, buffer);
302  }
303  SCReturnPtr(buffer, "InspectionBuffer");
304 }
305 
306 static uint8_t DetectEngineInspectBufferHttpBody(DetectEngineCtx *de_ctx,
308  const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id)
309 {
310  bool eof =
311  (AppLayerParserGetStateProgress(f->proto, f->alproto, txv, flags) > engine->progress);
312  const InspectionBuffer *buffer = HttpRequestBodyGetDataCallback(
313  det_ctx, engine->v2.transforms, f, flags, txv, engine->sm_list, engine->sm_list_base);
314  if (buffer == NULL || buffer->inspect == NULL) {
316  }
317 
318  const uint32_t data_len = buffer->inspect_len;
319  const uint8_t *data = buffer->inspect;
320  const uint64_t offset = buffer->inspect_offset;
321 
322  uint8_t ci_flags = eof ? DETECT_CI_FLAGS_END : 0;
323  ci_flags |= (offset == 0 ? DETECT_CI_FLAGS_START : 0);
324  ci_flags |= buffer->flags;
325 
326  /* Inspect all the uricontents fetched on each
327  * transaction at the app layer */
328  const bool match = DetectEngineContentInspection(de_ctx, det_ctx, s, engine->smd, NULL, f, data,
330  if (match) {
332  }
333 
334  if (flags & STREAM_TOSERVER) {
335  if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, txv, flags) >
336  HTP_REQUEST_BODY)
338  } else {
339  if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, txv, flags) >
340  HTP_RESPONSE_BODY)
342  }
344 }
345 
346 /** \brief HTTP Request body callback
347  *
348  * \param det_ctx detection engine thread ctx
349  * \param pectx inspection context
350  * \param p packet to inspect
351  * \param f flow to inspect
352  * \param txv tx to inspect
353  * \param idx transaction id
354  * \param flags STREAM_* flags including direction
355  */
356 static void PrefilterTxHttpRequestBody(DetectEngineThreadCtx *det_ctx, const void *pectx, Packet *p,
357  Flow *f, void *txv, const uint64_t idx, const AppLayerTxData *_txd, const uint8_t flags)
358 {
359  SCEnter();
360 
361  const PrefilterMpmHttpRequestBody *ctx = (const PrefilterMpmHttpRequestBody *)pectx;
362  const MpmCtx *mpm_ctx = ctx->mpm_ctx;
363  const int list_id = ctx->list_id;
364 
365  InspectionBuffer *buffer = HttpRequestBodyGetDataCallback(
366  det_ctx, ctx->transforms, f, flags, txv, list_id, ctx->base_list_id);
367  if (buffer == NULL)
368  return;
369 
370  if (buffer->inspect_len >= mpm_ctx->minlen) {
371  (void)mpm_table[mpm_ctx->mpm_type].Search(
372  mpm_ctx, &det_ctx->mtc, &det_ctx->pmq, buffer->inspect, buffer->inspect_len);
373  PREFILTER_PROFILING_ADD_BYTES(det_ctx, buffer->inspect_len);
374  }
375 }
376 
377 static int PrefilterMpmHttpRequestBodyRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
378  MpmCtx *mpm_ctx, const DetectBufferMpmRegistry *mpm_reg, int list_id)
379 {
380  PrefilterMpmHttpRequestBody *pectx = SCCalloc(1, sizeof(*pectx));
381  if (pectx == NULL)
382  return -1;
383  pectx->list_id = list_id;
384  pectx->base_list_id = mpm_reg->sm_list_base;
385  SCLogDebug("list_id %d base_list_id %d", list_id, pectx->base_list_id);
386  pectx->mpm_ctx = mpm_ctx;
387  pectx->transforms = &mpm_reg->transforms;
388 
389  return PrefilterAppendTxEngine(de_ctx, sgh, PrefilterTxHttpRequestBody, mpm_reg->app_v2.alproto,
390  mpm_reg->app_v2.tx_min_progress, pectx, PrefilterMpmHttpRequestBodyFree,
391  mpm_reg->pname);
392 }
393 
394 #ifdef UNITTESTS
395 #include "detect-engine-alert.h"
397 #endif /* UNITTESTS */
398 
399 /**
400  * @}
401  */
HtpState_::cfg
const struct HTPCfgRec_ * cfg
Definition: app-layer-htp.h:258
DetectEngineAppInspectionEngine_
Definition: detect.h:424
SigTableElmt_::url
const char * url
Definition: detect.h:1296
DetectSignatureSetAppProto
int DetectSignatureSetAppProto(Signature *s, AppProto alproto)
Definition: detect-parse.c:1753
detect-content.h
MpmCtx_::mpm_type
uint8_t mpm_type
Definition: util-mpm.h:90
detect-engine.h
SIGMATCH_INFO_STICKY_BUFFER
#define SIGMATCH_INFO_STICKY_BUFFER
Definition: detect.h:1497
SigTableElmt_::desc
const char * desc
Definition: detect.h:1295
offset
uint64_t offset
Definition: util-streaming-buffer.h:0
DETECT_CI_FLAGS_START
#define DETECT_CI_FLAGS_START
Definition: detect-engine-content-inspection.h:40
flow-util.h
SIGMATCH_INFO_CONTENT_MODIFIER
#define SIGMATCH_INFO_CONTENT_MODIFIER
Definition: detect.h:1495
SigTableElmt_::name
const char * name
Definition: detect.h:1293
stream-tcp.h
SigGroupHead_
Container for matching data for a signature group.
Definition: detect.h:1445
DetectHttpClientBodyRegisterTests
void DetectHttpClientBodyRegisterTests(void)
Definition: detect-http-client-body.c:2904
HtpBody_::sb
StreamingBuffer * sb
Definition: app-layer-htp.h:190
DetectEngineTransforms
Definition: detect.h:406
DetectBufferMpmRegistry_::sm_list_base
int16_t sm_list_base
Definition: detect.h:682
SIG_FLAG_INIT_NEED_FLUSH
#define SIG_FLAG_INIT_NEED_FLUSH
Definition: detect.h:289
PrefilterMpmHttpRequestBody::list_id
int list_id
Definition: detect-http-client-body.c:185
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:269
HTPCfgDir_::body_limit
uint32_t body_limit
Definition: app-layer-htp.h:151
Flow_::proto
uint8_t proto
Definition: flow.h:373
DetectBufferSetActiveList
int DetectBufferSetActiveList(DetectEngineCtx *de_ctx, Signature *s, const int list)
Definition: detect-engine.c:1335
DETECT_AL_HTTP_CLIENT_BODY
@ DETECT_AL_HTTP_CLIENT_BODY
Definition: detect-engine-register.h:138
AppLayerParserGetStateProgress
int AppLayerParserGetStateProgress(uint8_t ipproto, AppProto alproto, void *alstate, uint8_t flags)
get the progress value for a tx/protocol
Definition: app-layer-parser.c:1092
InspectionBuffer
Definition: detect.h:371
threads.h
Flow_
Flow data structure.
Definition: flow.h:351
DetectBufferTypeRegisterSetupCallback
void DetectBufferTypeRegisterSetupCallback(const char *name, void(*SetupCallback)(const DetectEngineCtx *, Signature *))
Definition: detect-engine.c:1266
DetectEngineThreadCtx_::pmq
PrefilterRuleStore pmq
Definition: detect.h:1201
SigTableElmt_::flags
uint16_t flags
Definition: detect.h:1287
DetectEngineCtx_
main detection engine ctx
Definition: detect.h:836
PrefilterMpmFiledataRegister
int PrefilterMpmFiledataRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh, MpmCtx *mpm_ctx, const DetectBufferMpmRegistry *mpm_reg, int list_id)
Definition: detect-file-data.c:478
HtpTxUserData_::request_body
HtpBody request_body
Definition: app-layer-htp.h:222
detect-http-client-body.h
DetectBufferMpmRegistry_
one time registration of keywords at start up
Definition: detect.h:677
detect-file-data.h
DetectEngineAppInspectionEngine_::sm_list_base
uint16_t sm_list_base
Definition: detect.h:431
InspectionBuffer::flags
uint8_t flags
Definition: detect.h:376
SignatureInitData_::init_flags
uint32_t init_flags
Definition: detect.h:545
DetectBufferMpmRegistry_::app_v2
struct DetectBufferMpmRegistry_::@88::@90 app_v2
StreamingBufferGetDataAtOffset
int StreamingBufferGetDataAtOffset(const StreamingBuffer *sb, const uint8_t **data, uint32_t *data_len, uint64_t offset)
Definition: util-streaming-buffer.c:1771
SigTableElmt_::Setup
int(* Setup)(DetectEngineCtx *, Signature *, const char *)
Definition: detect.h:1278
detect-pcre.h
DetectBufferMpmRegistry_::transforms
DetectEngineTransforms transforms
Definition: detect.h:690
detect-engine-prefilter.h
PrefilterMpmHttpRequestBody
struct PrefilterMpmHttpRequestBody PrefilterMpmHttpRequestBody
HTPCfgDir_::inspect_window
uint32_t inspect_window
Definition: app-layer-htp.h:153
util-unittest.h
InspectionBufferGet
InspectionBuffer * InspectionBufferGet(DetectEngineThreadCtx *det_ctx, const int list_id)
Definition: detect-engine.c:1479
HtpBody_::first
HtpBodyChunk * first
Definition: app-layer-htp.h:187
DETECT_HTTP_REQUEST_BODY
@ DETECT_HTTP_REQUEST_BODY
Definition: detect-engine-register.h:139
HtpState_
Definition: app-layer-htp.h:244
util-unittest-helper.h
PrefilterMpmHttpRequestBody
Definition: detect-http-client-body.c:184
DetectBufferTypeGetByName
int DetectBufferTypeGetByName(const char *name)
Definition: detect-engine.c:1072
HtpBody_::content_len_so_far
uint64_t content_len_so_far
Definition: app-layer-htp.h:193
DetectEngineAppInspectionEngine_::sm_list
uint16_t sm_list
Definition: detect.h:430
SIG_FLAG_TOSERVER
#define SIG_FLAG_TOSERVER
Definition: detect.h:263
app-layer-htp.h
decode.h
util-debug.h
HTPCfgRec_::http_body_inline
int http_body_inline
Definition: app-layer-htp.h:164
de_ctx
DetectEngineCtx * de_ctx
Definition: fuzz_siginit.c:17
PrefilterMpmHttpRequestBody::transforms
const DetectEngineTransforms * transforms
Definition: detect-http-client-body.c:188
DetectEngineThreadCtx_
Definition: detect.h:1092
HTPCfgDir_::inspect_min_size
uint32_t inspect_min_size
Definition: app-layer-htp.h:152
AppLayerHtpEnableRequestBodyCallback
void AppLayerHtpEnableRequestBodyCallback(void)
Sets a flag that informs the HTP app layer that some module in the engine needs the http request body...
Definition: app-layer-htp.c:474
SCEnter
#define SCEnter(...)
Definition: util-debug.h:271
detect-engine-mpm.h
detect-http-client-body.c
Handle HTTP request body match corresponding to http_client_body keyword.
detect.h
DETECT_ENGINE_INSPECT_SIG_MATCH
#define DETECT_ENGINE_INSPECT_SIG_MATCH
Definition: detect-engine-state.h:38
InspectionBuffer::inspect_offset
uint64_t inspect_offset
Definition: detect.h:373
DETECT_ENGINE_CONTENT_INSPECTION_MODE_STATE
@ DETECT_ENGINE_CONTENT_INSPECTION_MODE_STATE
Definition: detect-engine-content-inspection.h:36
SigTableElmt_::alternative
uint16_t alternative
Definition: detect.h:1291
DetectAppLayerMpmRegister
void DetectAppLayerMpmRegister(const char *name, int direction, int priority, PrefilterRegisterFunc PrefilterRegister, InspectionBufferGetDataPtr GetData, AppProto alproto, int tx_min_progress)
register a MPM engine
Definition: detect-engine-mpm.c:89
app-layer-parser.h
MpmCtx_::minlen
uint16_t minlen
Definition: util-mpm.h:99
BUG_ON
#define BUG_ON(x)
Definition: suricata-common.h:300
util-profiling.h
DetectEngineContentModifierBufferSetup
int DetectEngineContentModifierBufferSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg, int sm_type, int sm_list, AppProto alproto)
Definition: detect-parse.c:205
Packet_
Definition: decode.h:437
DETECT_CI_FLAGS_END
#define DETECT_CI_FLAGS_END
Definition: detect-engine-content-inspection.h:42
detect-engine-alert.h
Signature_::init_data
SignatureInitData * init_data
Definition: detect.h:662
SCReturnPtr
#define SCReturnPtr(x, type)
Definition: util-debug.h:287
detect-engine-state.h
Data structures and function prototypes for keeping state for the detection engine.
ALPROTO_HTTP2
@ ALPROTO_HTTP2
Definition: app-layer-protos.h:62
MpmTableElmt_::Search
uint32_t(* Search)(const struct MpmCtx_ *, struct MpmThreadCtx_ *, PrefilterRuleStore *, const uint8_t *, uint32_t)
Definition: util-mpm.h:168
DetectEngineAppInspectionEngine_::v2
struct DetectEngineAppInspectionEngine_::@85 v2
DETECT_ENGINE_INSPECT_SIG_CANT_MATCH
#define DETECT_ENGINE_INSPECT_SIG_CANT_MATCH
Definition: detect-engine-state.h:39
DetectEngineThreadCtx_::mtc
MpmThreadCtx mtc
Definition: detect.h:1200
detect-engine-content-inspection.h
DetectEngineAppInspectionEngine_::smd
SigMatchData * smd
Definition: detect.h:441
PrefilterMpmHttpRequestBody::base_list_id
int base_list_id
Definition: detect-http-client-body.c:186
AppLayerTxData
struct AppLayerTxData AppLayerTxData
Definition: detect.h:1355
PREFILTER_PROFILING_ADD_BYTES
#define PREFILTER_PROFILING_ADD_BYTES(det_ctx, bytes)
Definition: util-profiling.h:287
HtpBody_
Definition: app-layer-htp.h:186
flags
uint8_t flags
Definition: decode-gre.h:0
suricata-common.h
PrefilterMpmHttpRequestBody::mpm_ctx
const MpmCtx * mpm_ctx
Definition: detect-http-client-body.c:187
HTPCfgRec_::request
HTPCfgDir request
Definition: app-layer-htp.h:171
InspectionBufferApplyTransforms
void InspectionBufferApplyTransforms(InspectionBuffer *buffer, const DetectEngineTransforms *transforms)
Definition: detect-engine.c:1678
HtpBodyChunk_
Definition: app-layer-htp.h:178
ALPROTO_HTTP1
@ ALPROTO_HTTP1
Definition: app-layer-protos.h:30
sigmatch_table
SigTableElmt sigmatch_table[DETECT_TBLSIZE]
Definition: detect-parse.c:127
DetectHttpClientBodyRegister
void DetectHttpClientBodyRegister(void)
Registers the keyword handlers for the "http_client_body" keyword.
Definition: detect-http-client-body.c:84
util-spm.h
PrefilterAppendTxEngine
int PrefilterAppendTxEngine(DetectEngineCtx *de_ctx, SigGroupHead *sgh, PrefilterTxFn PrefilterTxFunc, AppProto alproto, int tx_min_progress, void *pectx, void(*FreeFunc)(void *pectx), const char *name)
Definition: detect-engine-prefilter.c:270
HtpTxUserData_
Definition: app-layer-htp.h:207
DETECT_ENGINE_INSPECT_SIG_NO_MATCH
#define DETECT_ENGINE_INSPECT_SIG_NO_MATCH
Definition: detect-engine-state.h:37
DetectEngineAppInspectionEngine_::progress
int16_t progress
Definition: detect.h:432
InspectionBuffer::inspect_len
uint32_t inspect_len
Definition: detect.h:374
InspectionBuffer::inspect
const uint8_t * inspect
Definition: detect.h:372
str
#define str(s)
Definition: suricata-common.h:291
InspectionBufferSetup
void InspectionBufferSetup(DetectEngineThreadCtx *det_ctx, const int list_id, InspectionBuffer *buffer, const uint8_t *data, const uint32_t data_len)
setup the buffer with our initial data
Definition: detect-engine.c:1574
SCFree
#define SCFree(p)
Definition: util-mem.h:61
Flow_::alstate
void * alstate
Definition: flow.h:476
Signature_::id
uint32_t id
Definition: detect.h:628
detect-parse.h
Signature_
Signature container.
Definition: detect.h:593
DetectEngineAppInspectionEngine_::transforms
const DetectEngineTransforms * transforms
Definition: detect.h:438
ALPROTO_HTTP
@ ALPROTO_HTTP
Definition: app-layer-protos.h:67
mpm_table
MpmTableElmt mpm_table[MPM_TABLE_SIZE]
Definition: util-mpm.c:47
SIGMATCH_NOOPT
#define SIGMATCH_NOOPT
Definition: detect.h:1473
DetectAppLayerInspectEngineRegister
void DetectAppLayerInspectEngineRegister(const char *name, AppProto alproto, uint32_t dir, int progress, InspectEngineFuncPtr Callback, InspectionBufferGetDataPtr GetData)
register inspect engine at start up time
Definition: detect-engine.c:169
DetectBufferTypeSetDescriptionByName
void DetectBufferTypeSetDescriptionByName(const char *name, const char *desc)
Definition: detect-engine.c:1169
MpmCtx_
Definition: util-mpm.h:88
flow.h
DetectEngineContentInspection
bool DetectEngineContentInspection(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const Signature *s, const SigMatchData *smd, Packet *p, Flow *f, const uint8_t *buffer, const uint32_t buffer_len, const uint32_t stream_start_offset, const uint8_t flags, const enum DetectContentInspectionType inspection_mode)
wrapper around DetectEngineContentInspectionInternal to return true/false only
Definition: detect-engine-content-inspection.c:723
Flow_::alproto
AppProto alproto
application level protocol
Definition: flow.h:450
SCCalloc
#define SCCalloc(nm, sz)
Definition: util-mem.h:53
flow-var.h
DetectEngineInspectFiledata
uint8_t DetectEngineInspectFiledata(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const DetectEngineAppInspectionEngine *engine, const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id)
Definition: detect-file-data.c:389
SigTableElmt_::RegisterTests
void(* RegisterTests)(void)
Definition: detect.h:1285
HtpBody_::body_inspected
uint64_t body_inspected
Definition: app-layer-htp.h:197
app-layer.h
DetectBufferMpmRegistry_::pname
char pname[32]
Definition: detect.h:679