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detect-engine-hrhd.c
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detect-engine-hrhd.c
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/* 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 Anoop Saldanha <anoopsaldanha@gmail.com>
*
* \brief Handle HTTP raw header match.
*
*/
#include "suricata-common.h"
#include "suricata.h"
#include "decode.h"
#include "detect.h"
#include "detect-engine.h"
#include "detect-engine-hrhd.h"
#include "detect-engine-mpm.h"
#include "detect-parse.h"
#include "detect-engine-state.h"
#include "detect-engine-content-inspection.h"
#include "flow-util.h"
#include "util-debug.h"
#include "util-print.h"
#include "flow.h"
#include "app-layer-parser.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "app-layer.h"
#include "app-layer-htp.h"
#include "app-layer-protos.h"
int DetectEngineRunHttpRawHeaderMpm(DetectEngineThreadCtx *det_ctx, Flow *f,
HtpState *htp_state, uint8_t flags)
{
SCEnter();
htp_tx_t *tx = NULL;
uint32_t cnt = 0;
int idx;
/* we need to lock because the buffers are not actually true buffers
* but are ones that point to a buffer given by libhtp */
FLOWLOCK_RDLOCK(f);
if (htp_state == NULL) {
SCLogDebug("no HTTP state");
goto end;
}
if (htp_state->connp == NULL || htp_state->connp->conn == NULL) {
SCLogDebug("HTP state has no conn(p)");
goto end;
}
idx = AppLayerTransactionGetInspectId(f);
if (idx == -1) {
goto end;
}
int size = (int)list_size(htp_state->connp->conn->transactions);
for (; idx < size; idx++) {
tx = list_get(htp_state->connp->conn->transactions, idx);
if (tx == NULL)
continue;
bstr *raw_headers = htp_tx_get_request_headers_raw(tx);
if (raw_headers != NULL) {
cnt += HttpRawHeaderPatternSearch(det_ctx,
(uint8_t *)bstr_ptr(raw_headers),
bstr_len(raw_headers), flags);
} else {
SCLogDebug("no raw headers");
}
#ifdef HAVE_HTP_TX_GET_RESPONSE_HEADERS_RAW
raw_headers = htp_tx_get_response_headers_raw(tx);
if (raw_headers != NULL) {
cnt += HttpRawHeaderPatternSearch(det_ctx,
(uint8_t *)bstr_ptr(raw_headers),
bstr_len(raw_headers), flags);
} else {
SCLogDebug("no raw headers");
}
#endif /* HAVE_HTP_TX_GET_RESPONSE_HEADERS_RAW */
}
end:
FLOWLOCK_UNLOCK(f);
SCReturnInt(cnt);
}
/**
* \brief Do the http_raw_header content inspection for a signature.
*
* \param de_ctx Detection engine context.
* \param det_ctx Detection engine thread context.
* \param s Signature to inspect.
* \param f Flow.
* \param flags App layer flags.
* \param state App layer state.
*
* \retval 0 No match.
* \retval 1 Match.
*/
int DetectEngineInspectHttpRawHeader(ThreadVars *tv,
DetectEngineCtx *de_ctx,
DetectEngineThreadCtx *det_ctx,
Signature *s, Flow *f, uint8_t flags,
void *alstate, int tx_id)
{
HtpState *htp_state = (HtpState *)alstate;
htp_tx_t *tx = list_get(htp_state->connp->conn->transactions, tx_id);
if (tx == NULL)
return 0;
bstr *raw_headers = NULL;
if (flags & STREAM_TOSERVER) {
raw_headers = htp_tx_get_request_headers_raw(tx);
}
#ifdef HAVE_HTP_TX_GET_RESPONSE_HEADERS_RAW
else {
raw_headers = htp_tx_get_response_headers_raw(tx);
}
#endif /* HAVE_HTP_TX_GET_RESPONSE_HEADERS_RAW */
if (raw_headers == NULL)
return 0;
det_ctx->buffer_offset = 0;
det_ctx->discontinue_matching = 0;
det_ctx->inspection_recursion_counter = 0;
int r = DetectEngineContentInspection(de_ctx, det_ctx, s, s->sm_lists[DETECT_SM_LIST_HRHDMATCH],
f,
(uint8_t *)bstr_ptr(raw_headers),
bstr_len(raw_headers),
DETECT_ENGINE_CONTENT_INSPECTION_MODE_HRHD, NULL);
if (r == 1)
return 1;
return 0;
}
/***********************************Unittests**********************************/
#ifdef UNITTESTS
/**
*\test Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest01(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:\"one\"; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
printf("sid 1 didn't match but should have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest02(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:\"one\"; depth:15; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
printf("sid 1 didn't match but should have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest03(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:!\"one\"; depth:5; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
printf("sid 1 didn't match but should have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest04(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:\"one\"; depth:5; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest05(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:!\"one\"; depth:15; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest06(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:\"one\"; offset:10; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
printf("sid 1 didn't match but should have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest07(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:!\"one\"; offset:15; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!(PacketAlertCheck(p, 1))) {
printf("sid 1 didn't match but should have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest08(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:\"one\"; offset:15; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest09(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.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);
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx,"alert http any any -> any any "
"(msg:\"http header test\"; flow:to_server; "
"content:!\"one\"; offset:10; http_raw_header; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
int r = AppLayerParse(NULL, &f, ALPROTO_HTTP, STREAM_TOSERVER, http_buf, http_len);
if (r != 0) {
printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
result = 0;
goto end;
}
http_state = f.alstate;
if (http_state == NULL) {
printf("no http state: ");
result = 0;
goto end;
}
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have: ");
goto end;
}
result = 1;
end:
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 Test that the http_header content matches against a http request
* which holds the content.
*/
static int DetectEngineHttpRawHeaderTest10(void)
{
TcpSession ssn;
Packet *p = NULL;
ThreadVars th_v;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
HtpState *http_state = NULL;
Flow f;
uint8_t http_buf[] =
"GET /index.html HTTP/1.0\r\n"
"Host: www.onetwothreefourfivesixseven.org\r\n\r\n";
uint32_t http_len = sizeof(http_buf) - 1;
int result = 0;
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.flags |= FLOW_IPV4;
p->flow = &f;