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suricata/src/detect-http-method.c

920 lines
26 KiB
C

/* Copyright (C) 2007-2010 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \ingroup httplayer
*
* @{
*/
/**
* \file
*
* \author Brian Rectanus <brectanu@gmail.com>
*
* Implements the http_method keyword
*/
#include "suricata-common.h"
#include "threads.h"
#include "debug.h"
#include "decode.h"
#include "detect.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-mpm.h"
#include "detect-engine-state.h"
#include "detect-content.h"
#include "detect-pcre.h"
#include "flow.h"
#include "flow-var.h"
#include "flow-util.h"
#include "util-debug.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "util-spm.h"
#include "app-layer.h"
#include "app-layer-parser.h"
#include "app-layer-htp.h"
#include "detect-http-method.h"
#include "detect-engine-hmd.h"
#include "stream-tcp.h"
static int g_http_method_buffer_id = 0;
static int DetectHttpMethodSetup(DetectEngineCtx *, Signature *, char *);
void DetectHttpMethodRegisterTests(void);
void DetectHttpMethodFree(void *);
static void DetectHttpMethodSetupCallback(Signature *s);
static _Bool DetectHttpMethodValidateCallback(const Signature *s);
/**
* \brief Registration function for keyword: http_method
*/
void DetectHttpMethodRegister(void)
{
sigmatch_table[DETECT_AL_HTTP_METHOD].name = "http_method";
sigmatch_table[DETECT_AL_HTTP_METHOD].desc = "content modifier to match only on the HTTP method-buffer";
sigmatch_table[DETECT_AL_HTTP_METHOD].url = DOC_URL DOC_VERSION "/rules/http-keywords.html#http-method";
sigmatch_table[DETECT_AL_HTTP_METHOD].Match = NULL;
sigmatch_table[DETECT_AL_HTTP_METHOD].Setup = DetectHttpMethodSetup;
sigmatch_table[DETECT_AL_HTTP_METHOD].Free = DetectHttpMethodFree;
sigmatch_table[DETECT_AL_HTTP_METHOD].RegisterTests = DetectHttpMethodRegisterTests;
sigmatch_table[DETECT_AL_HTTP_METHOD].flags |= SIGMATCH_NOOPT;
DetectAppLayerMpmRegister("http_method", SIG_FLAG_TOSERVER, 4,
PrefilterTxMethodRegister);
DetectAppLayerInspectEngineRegister("http_method",
ALPROTO_HTTP, SIG_FLAG_TOSERVER,
DetectEngineInspectHttpMethod);
DetectBufferTypeSetDescriptionByName("http_method",
"http request method");
DetectBufferTypeRegisterSetupCallback("http_method",
DetectHttpMethodSetupCallback);
DetectBufferTypeRegisterValidateCallback("http_method",
DetectHttpMethodValidateCallback);
g_http_method_buffer_id = DetectBufferTypeGetByName("http_method");
SCLogDebug("registering http_method rule option");
}
/**
* \brief This function is used to add the parsed "http_method" option
* into the current signature.
*
* \param de_ctx Pointer to the Detection Engine Context.
* \param s Pointer to the Current Signature.
* \param str Pointer to the user provided option string.
*
* \retval 0 on Success.
* \retval -1 on Failure.
*/
static int DetectHttpMethodSetup(DetectEngineCtx *de_ctx, Signature *s, char *str)
{
return DetectEngineContentModifierBufferSetup(de_ctx, s, str,
DETECT_AL_HTTP_METHOD,
g_http_method_buffer_id,
ALPROTO_HTTP);
}
/**
* \brief this function will free memory associated with DetectContentData
*
* \param id_d pointer to DetectContentData
*/
void DetectHttpMethodFree(void *ptr)
{
DetectContentData *data = (DetectContentData *)ptr;
if (data->content != NULL)
SCFree(data->content);
SCFree(data);
}
static void DetectHttpMethodSetupCallback(Signature *s)
{
SCLogDebug("callback invoked by %u", s->id);
s->mask |= SIG_MASK_REQUIRE_HTTP_STATE;
}
/**
* \retval 1 valid
* \retval 0 invalid
*/
static _Bool DetectHttpMethodValidateCallback(const Signature *s)
{
const SigMatch *sm = s->init_data->smlists[g_http_method_buffer_id];
for ( ; sm != NULL; sm = sm->next) {
if (sm->type != DETECT_CONTENT)
continue;
const DetectContentData *cd = (const DetectContentData *)sm->ctx;
if (cd->content && cd->content_len) {
if (cd->content[cd->content_len-1] == 0x20) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "http_method pattern with trailing space");
return FALSE;
} else if (cd->content[0] == 0x20) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "http_method pattern with leading space");
return FALSE;
} else if (cd->content[cd->content_len-1] == 0x09) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "http_method pattern with trailing tab");
return FALSE;
} else if (cd->content[0] == 0x09) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "http_method pattern with leading tab");
return FALSE;
}
}
}
return TRUE;
}
#ifdef UNITTESTS /* UNITTESTS */
#include "detect-isdataat.h"
#include "stream-tcp-reassemble.h"
/** \test Check a signature with content */
int DetectHttpMethodTest01(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"GET\"; "
"http_method; sid:1;)");
if (de_ctx->sig_list != NULL) {
result = 1;
} else {
printf("sig parse failed: ");
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature without content (fail) */
int DetectHttpMethodTest02(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"http_method; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 1;
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature with parameter (fail) */
int DetectHttpMethodTest03(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"foobar\"; "
"http_method:\"GET\"; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 1;
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature with fast_pattern (should work) */
int DetectHttpMethodTest04(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"GET\"; "
"fast_pattern; "
"http_method; sid:1;)");
if (de_ctx->sig_list != NULL) {
result = 1;
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature with rawbytes (fail) */
int DetectHttpMethodTest05(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"GET\"; "
"rawbytes; "
"http_method; sid:1;)");
if (de_ctx->sig_list == NULL) {
result = 1;
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test setting the nocase flag */
static int DetectHttpMethodTest12(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
if (DetectEngineAppendSig(de_ctx, "alert http any any -> any any "
"(content:\"one\"; http_method; nocase; sid:1;)") == NULL) {
printf("DetectEngineAppend == NULL: ");
goto end;
}
if (DetectEngineAppendSig(de_ctx, "alert http any any -> any any "
"(content:\"one\"; nocase; http_method; sid:2;)") == NULL) {
printf("DetectEngineAppend == NULL: ");
goto end;
}
if (de_ctx->sig_list->sm_lists[g_http_method_buffer_id] == NULL) {
printf("de_ctx->sig_list->sm_lists[g_http_method_buffer_id] == NULL: ");
goto end;
}
DetectContentData *hmd1 = (DetectContentData *)de_ctx->sig_list->sm_lists_tail[g_http_method_buffer_id]->ctx;
DetectContentData *hmd2 = (DetectContentData *)de_ctx->sig_list->next->sm_lists_tail[g_http_method_buffer_id]->ctx;
if (!(hmd1->flags & DETECT_CONTENT_NOCASE)) {
printf("nocase flag not set on sig 1: ");
goto end;
}
if (!(hmd2->flags & DETECT_CONTENT_NOCASE)) {
printf("nocase flag not set on sig 2: ");
goto end;
}
result = 1;
end:
SigCleanSignatures(de_ctx);
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature with method + within and pcre with /M (should work) */
int DetectHttpMethodTest13(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"pcre:\"/HE/M\"; "
"content:\"AD\"; "
"within:2; http_method; sid:1;)");
if (de_ctx->sig_list != NULL) {
result = 1;
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature with method + within and pcre without /M (should fail) */
int DetectHttpMethodTest14(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"pcre:\"/HE/\"; "
"content:\"AD\"; "
"http_method; within:2; sid:1;)");
if (de_ctx->sig_list != NULL) {
result = 1;
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature with method + within and pcre with /M (should work) */
int DetectHttpMethodTest15(void)
{
DetectEngineCtx *de_ctx = NULL;
int result = 0;
if ( (de_ctx = DetectEngineCtxInit()) == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"pcre:\"/HE/M\"; "
"content:\"AD\"; "
"http_method; within:2; sid:1;)");
if (de_ctx->sig_list != NULL) {
result = 1;
}
end:
if (de_ctx != NULL)
SigCleanSignatures(de_ctx);
if (de_ctx != NULL)
DetectEngineCtxFree(de_ctx);
return result;
}
/** \test Check a signature with an known request method */
static int DetectHttpMethodSigTest01(void)
{
int result = 0;
Flow f;
uint8_t httpbuf1[] = "GET / HTTP/1.0\r\n"
"Host: foo.bar.tld\r\n"
"\r\n";
uint32_t httplen1 = sizeof(httpbuf1) - 1; /* minus the \0 */
TcpSession ssn;
Packet *p = NULL;
Signature *s = NULL;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
HtpState *http_state = NULL;
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
memset(&th_v, 0, sizeof(th_v));
memset(&f, 0, sizeof(f));
memset(&ssn, 0, sizeof(ssn));
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
FLOW_INITIALIZE(&f);
f.protoctx = (void *)&ssn;
f.proto = IPPROTO_TCP;
f.flags |= FLOW_IPV4;
p->flow = &f;
p->flowflags |= FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_ESTABLISHED;
p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;
f.alproto = ALPROTO_HTTP;
StreamTcpInitConfig(TRUE);
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL) {
goto end;
}
de_ctx->flags |= DE_QUIET;
s = de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"GET\"; "
"http_method; sid:1;)");
if (s == NULL) {
goto end;
}
s = s->next = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"POST\"; "
"http_method; sid:2;)");
if (s == NULL) {
goto end;
}
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
FLOWLOCK_WRLOCK(&f);
int r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_HTTP,
STREAM_TOSERVER, httpbuf1, httplen1);
if (r != 0) {
SCLogDebug("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
http_state = f.alstate;
if (http_state == NULL) {
SCLogDebug("no http state: ");
goto end;
}
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
goto end;
}
if (PacketAlertCheck(p, 2)) {
goto end;
}
result = 1;
end:
if (alp_tctx != NULL)
AppLayerParserThreadCtxFree(alp_tctx);
if (de_ctx != NULL) SigGroupCleanup(de_ctx);
if (de_ctx != NULL) SigCleanSignatures(de_ctx);
if (de_ctx != NULL) DetectEngineCtxFree(de_ctx);
StreamTcpFreeConfig(TRUE);
FLOW_DESTROY(&f);
UTHFreePackets(&p, 1);
return result;
}
/** \test Check a signature with an unknown request method */
static int DetectHttpMethodSigTest02(void)
{
int result = 0;
Flow f;
uint8_t httpbuf1[] = "FOO / HTTP/1.0\r\n"
"Host: foo.bar.tld\r\n"
"\r\n";
uint32_t httplen1 = sizeof(httpbuf1) - 1; /* minus the \0 */
TcpSession ssn;
Packet *p = NULL;
Signature *s = NULL;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
memset(&th_v, 0, sizeof(th_v));
memset(&f, 0, sizeof(f));
memset(&ssn, 0, sizeof(ssn));
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
FLOW_INITIALIZE(&f);
f.protoctx = (void *)&ssn;
f.proto = IPPROTO_TCP;
f.flags |= FLOW_IPV4;
p->flow = &f;
p->flowflags |= FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_ESTABLISHED;
p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;
f.alproto = ALPROTO_HTTP;
StreamTcpInitConfig(TRUE);
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL) {
goto end;
}
de_ctx->flags |= DE_QUIET;
s = de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"FOO\"; "
"http_method; sid:1;)");
if (s == NULL) {
goto end;
}
s = s->next = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"BAR\"; "
"http_method; sid:2;)");
if (s == NULL) {
goto end;
}
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
FLOWLOCK_WRLOCK(&f);
int r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_HTTP,
STREAM_TOSERVER, httpbuf1, httplen1);
if (r != 0) {
SCLogDebug("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
http_state = f.alstate;
if (http_state == NULL) {
SCLogDebug("no http state: ");
goto end;
}
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
goto end;
}
if (PacketAlertCheck(p, 2)) {
goto end;
}
result = 1;
end:
if (alp_tctx != NULL)
AppLayerParserThreadCtxFree(alp_tctx);
if (de_ctx != NULL) SigGroupCleanup(de_ctx);
if (de_ctx != NULL) SigCleanSignatures(de_ctx);
if (det_ctx != NULL) DetectEngineThreadCtxDeinit(&th_v, (void *) det_ctx);
if (de_ctx != NULL) DetectEngineCtxFree(de_ctx);
StreamTcpFreeConfig(TRUE);
FLOW_DESTROY(&f);
UTHFreePackets(&p, 1);
return result;
}
/** \test Check a signature against an unparsable request */
static int DetectHttpMethodSigTest03(void)
{
int result = 0;
Flow f;
uint8_t httpbuf1[] = " ";
uint32_t httplen1 = sizeof(httpbuf1) - 1; /* minus the \0 */
TcpSession ssn;
Packet *p = NULL;
Signature *s = NULL;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx;
HtpState *http_state = NULL;
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
memset(&th_v, 0, sizeof(th_v));
memset(&f, 0, sizeof(f));
memset(&ssn, 0, sizeof(ssn));
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
FLOW_INITIALIZE(&f);
f.protoctx = (void *)&ssn;
f.proto = IPPROTO_TCP;
f.flags |= FLOW_IPV4;
p->flow = &f;
p->flowflags |= FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_ESTABLISHED;
p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;
f.alproto = ALPROTO_HTTP;
StreamTcpInitConfig(TRUE);
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL) {
goto end;
}
de_ctx->flags |= DE_QUIET;
s = de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"Testing http_method\"; "
"content:\"GET\"; "
"http_method; sid:1;)");
if (s == NULL) {
SCLogDebug("Bad signature");
goto end;
}
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
FLOWLOCK_WRLOCK(&f);
int r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_HTTP,
STREAM_TOSERVER, httpbuf1, httplen1);
if (r != 0) {
SCLogDebug("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
http_state = f.alstate;
if (http_state == NULL) {
SCLogDebug("no http state: ");
goto end;
}
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
goto end;
}
result = 1;
end:
if (alp_tctx != NULL)
AppLayerParserThreadCtxFree(alp_tctx);
if (de_ctx != NULL) SigGroupCleanup(de_ctx);
if (de_ctx != NULL) SigCleanSignatures(de_ctx);
if (de_ctx != NULL) DetectEngineCtxFree(de_ctx);
StreamTcpFreeConfig(TRUE);
FLOW_DESTROY(&f);
UTHFreePackets(&p, 1);
return result;
}
/** \test Check a signature with an request method and negation of the same */
static int DetectHttpMethodSigTest04(void)
{
int result = 0;
Flow f;
uint8_t httpbuf1[] = "GET / HTTP/1.0\r\n"
"Host: foo.bar.tld\r\n"
"\r\n";
uint32_t httplen1 = sizeof(httpbuf1) - 1; /* minus the \0 */
TcpSession ssn;
Packet *p = NULL;
Signature *s = NULL;
ThreadVars th_v;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();
memset(&th_v, 0, sizeof(th_v));
memset(&f, 0, sizeof(f));
memset(&ssn, 0, sizeof(ssn));
p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
FLOW_INITIALIZE(&f);
f.protoctx = (void *)&ssn;
f.proto = IPPROTO_TCP;
f.flags |= FLOW_IPV4;
p->flow = &f;
p->flowflags |= FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_ESTABLISHED;
p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;
f.alproto = ALPROTO_HTTP;
StreamTcpInitConfig(TRUE);
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL) {
goto end;
}
de_ctx->flags |= DE_QUIET;
s = de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any (msg:\"Testing http_method\"; "
"content:\"GET\"; http_method; sid:1;)");
if (s == NULL) {
goto end;
}
s = s->next = SigInit(de_ctx,
"alert tcp any any -> any any (msg:\"Testing http_method\"; "
"content:!\"GET\"; http_method; sid:2;)");
if (s == NULL) {
goto end;
}
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
FLOWLOCK_WRLOCK(&f);
int r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_HTTP,
STREAM_TOSERVER, httpbuf1, httplen1);
if (r != 0) {
SCLogDebug("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
http_state = f.alstate;
if (http_state == NULL) {
SCLogDebug("no http state: ");
goto end;
}
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
printf("sid 1 didn't match but should have: ");
goto end;
}
if (PacketAlertCheck(p, 2)) {
printf("sid 2 matched but shouldn't have: ");
goto end;
}
result = 1;
end:
if (alp_tctx != NULL)
AppLayerParserThreadCtxFree(alp_tctx);
if (de_ctx != NULL) {
SigGroupCleanup(de_ctx);
SigCleanSignatures(de_ctx);
}
if (det_ctx != NULL) {
DetectEngineThreadCtxDeinit(&th_v, (void *) det_ctx);
}
if (de_ctx != NULL) {
DetectEngineCtxFree(de_ctx);
}
StreamTcpFreeConfig(TRUE);
FLOW_DESTROY(&f);
UTHFreePackets(&p, 1);
return result;
}
static int DetectHttpMethodIsdataatParseTest(void)
{
DetectEngineCtx *de_ctx = DetectEngineCtxInit();
FAIL_IF_NULL(de_ctx);
de_ctx->flags |= DE_QUIET;
Signature *s = DetectEngineAppendSig(de_ctx,
"alert tcp any any -> any any ("
"content:\"one\"; http_method; "
"isdataat:!4,relative; sid:1;)");
FAIL_IF_NULL(s);
SigMatch *sm = s->init_data->smlists_tail[g_http_method_buffer_id];
FAIL_IF_NULL(sm);
FAIL_IF_NOT(sm->type == DETECT_ISDATAAT);
DetectIsdataatData *data = (DetectIsdataatData *)sm->ctx;
FAIL_IF_NOT(data->flags & ISDATAAT_RELATIVE);
FAIL_IF_NOT(data->flags & ISDATAAT_NEGATED);
FAIL_IF(data->flags & ISDATAAT_RAWBYTES);
DetectEngineCtxFree(de_ctx);
PASS;
}
#endif /* UNITTESTS */
/**
* \brief this function registers unit tests for DetectHttpMethod
*/
void DetectHttpMethodRegisterTests(void)
{
#ifdef UNITTESTS /* UNITTESTS */
SCLogDebug("Registering tests for DetectHttpMethod...");
UtRegisterTest("DetectHttpMethodTest01", DetectHttpMethodTest01);
UtRegisterTest("DetectHttpMethodTest02", DetectHttpMethodTest02);
UtRegisterTest("DetectHttpMethodTest03", DetectHttpMethodTest03);
UtRegisterTest("DetectHttpMethodTest04", DetectHttpMethodTest04);
UtRegisterTest("DetectHttpMethodTest05", DetectHttpMethodTest05);
UtRegisterTest("DetectHttpMethodTest12 -- nocase flag",
DetectHttpMethodTest12);
UtRegisterTest("DetectHttpMethodTest13", DetectHttpMethodTest13);
UtRegisterTest("DetectHttpMethodTest14", DetectHttpMethodTest14);
UtRegisterTest("DetectHttpMethodTest15", DetectHttpMethodTest15);
UtRegisterTest("DetectHttpMethodSigTest01", DetectHttpMethodSigTest01);
UtRegisterTest("DetectHttpMethodSigTest02", DetectHttpMethodSigTest02);
UtRegisterTest("DetectHttpMethodSigTest03", DetectHttpMethodSigTest03);
UtRegisterTest("DetectHttpMethodSigTest04", DetectHttpMethodSigTest04);
UtRegisterTest("DetectHttpMethodIsdataatParseTest",
DetectHttpMethodIsdataatParseTest);
#endif /* UNITTESTS */
}
/**
* @}
*/