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suricata/src/detect-app-layer-event.c

841 lines
26 KiB
C

/* Copyright (C) 2007-2012 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.
*/
/**
* \file
*
* \author Anoop Saldanha <anoopsaldanha@gmail.com>
*/
#include "suricata-common.h"
#include "threads.h"
#include "decode.h"
#include "app-layer.h"
#include "app-layer-protos.h"
#include "app-layer-parser.h"
#include "app-layer-smtp.h"
#include "detect.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-state.h"
#include "detect-app-layer-event.h"
#include "flow.h"
#include "flow-var.h"
#include "flow-util.h"
#include "decode-events.h"
#include "util-byte.h"
#include "util-debug.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
static int DetectAppLayerEventPktMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
Packet *p, Signature *s, SigMatch *m);
static int DetectAppLayerEventAppMatch(ThreadVars *, DetectEngineThreadCtx *, Flow *,
uint8_t, void *, Signature *, SigMatch *);
static int DetectAppLayerEventSetupP1(DetectEngineCtx *, Signature *, char *);
static void DetectAppLayerEventRegisterTests(void);
static void DetectAppLayerEventFree(void *);
/**
* \brief Registers the keyword handlers for the "app-layer-event" keyword.
*/
void DetectAppLayerEventRegister(void)
{
sigmatch_table[DETECT_AL_APP_LAYER_EVENT].name = "app-layer-event";
sigmatch_table[DETECT_AL_APP_LAYER_EVENT].Match =
DetectAppLayerEventPktMatch;
sigmatch_table[DETECT_AL_APP_LAYER_EVENT].AppLayerMatch =
DetectAppLayerEventAppMatch;
sigmatch_table[DETECT_AL_APP_LAYER_EVENT].Setup = DetectAppLayerEventSetupP1;
sigmatch_table[DETECT_AL_APP_LAYER_EVENT].Free = DetectAppLayerEventFree;
sigmatch_table[DETECT_AL_APP_LAYER_EVENT].RegisterTests =
DetectAppLayerEventRegisterTests;
return;
}
static int DetectAppLayerEventPktMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
Packet *p, Signature *s, SigMatch *m)
{
DetectAppLayerEventData *aled = (DetectAppLayerEventData *)m->ctx;
return AppLayerDecoderEventsIsEventSet(p->app_layer_events,
aled->event_id);
}
static int DetectAppLayerEventAppMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
Flow *f, uint8_t flags, void *state, Signature *s,
SigMatch *m)
{
SCEnter();
AppLayerDecoderEvents *decoder_events = NULL;
int r = 0;
DetectAppLayerEventData *aled = (DetectAppLayerEventData *)m->ctx;
FLOWLOCK_RDLOCK(f);
if (r == 0) {
decoder_events = AppLayerParserGetDecoderEvents(f->alparser);
if (decoder_events != NULL &&
AppLayerDecoderEventsIsEventSet(decoder_events, aled->event_id)) {
r = 1;
}
}
FLOWLOCK_UNLOCK(f);
SCReturnInt(r);
}
static DetectAppLayerEventData *DetectAppLayerEventParsePkt(const char *arg,
AppLayerEventType *event_type)
{
DetectAppLayerEventData *aled;
int event_id = 0;
int r = 0;
r = AppLayerGetPktEventInfo(arg, &event_id);
if (r < 0) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "app-layer-event keyword "
"supplied with packet based event - \"%s\" that isn't "
"supported yet.", arg);
return NULL;
}
aled = SCMalloc(sizeof(DetectAppLayerEventData));
if (unlikely(aled == NULL))
return NULL;
memset(aled,0x00,sizeof(*aled));
aled->event_id = event_id;
*event_type = APP_LAYER_EVENT_TYPE_PACKET;
return aled;
}
static int DetectAppLayerEventParseAppP2(DetectAppLayerEventData *data,
uint8_t *ipproto_bitarray,
AppLayerEventType *event_type)
{
int event_id = 0;
const char *p_idx;
uint8_t ipproto;
char alproto_name[50];
int r = 0;
p_idx = strchr(data->arg, '.');
strlcpy(alproto_name, data->arg, p_idx - data->arg + 1);
if (ipproto_bitarray[IPPROTO_TCP / 8] & 1 << (IPPROTO_TCP % 8)) {
ipproto = IPPROTO_TCP;
} else if (ipproto_bitarray[IPPROTO_UDP / 8] & 1 << (IPPROTO_UDP % 8)) {
ipproto = IPPROTO_UDP;
} else {
return -1;
}
r = AppLayerParserGetEventInfo(ipproto, data->alproto,
p_idx + 1, &event_id, event_type);
if (r < 0) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "app-layer-event keyword's "
"protocol \"%s\" doesn't have event \"%s\" registered",
alproto_name, p_idx + 1);
return -1;
}
data->event_id = event_id;
return 0;
}
static DetectAppLayerEventData *DetectAppLayerEventParseAppP1(const char *arg)
{
/* period index */
DetectAppLayerEventData *aled;
AppProto alproto;
const char *p_idx;
char alproto_name[50];
p_idx = strchr(arg, '.');
/* + 1 for trailing \0 */
strlcpy(alproto_name, arg, p_idx - arg + 1);
alproto = AppLayerGetProtoByName(alproto_name);
if (alproto == ALPROTO_UNKNOWN) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "app-layer-event keyword "
"supplied with unknown protocol \"%s\"",
alproto_name);
return NULL;
}
aled = SCMalloc(sizeof(*aled));
if (unlikely(aled == NULL))
return NULL;
memset(aled, 0x00, sizeof(*aled));
aled->alproto = alproto;
aled->arg = SCStrdup(arg);
if (aled->arg == NULL) {
SCFree(aled);
return NULL;
}
return aled;
}
static DetectAppLayerEventData *DetectAppLayerEventParse(const char *arg,
AppLayerEventType *event_type)
{
*event_type = 0;
if (arg == NULL) {
SCLogError(SC_ERR_INVALID_SIGNATURE, "app-layer-event keyword supplied "
"with no arguments. This keyword needs an argument.");
return NULL;
}
while (*arg != '\0' && isspace((unsigned char)*arg))
arg++;
if (strchr(arg, '.') == NULL) {
return DetectAppLayerEventParsePkt(arg, event_type);
} else {
return DetectAppLayerEventParseAppP1(arg);
}
}
static int DetectAppLayerEventSetupP2(Signature *s,
SigMatch *sm)
{
AppLayerEventType event_type = 0;
if (DetectAppLayerEventParseAppP2(sm->ctx, s->proto.proto,
&event_type) < 0)
{
SCLogError(SC_ERR_INVALID_SIGNATURE, "App layer event setup "
"phase2 failure.");
return -1;
}
if (event_type == APP_LAYER_EVENT_TYPE_GENERAL)
SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_AMATCH);
else
SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_APP_EVENT);
/* We should have set this flag already in SetupP1 */
s->flags |= SIG_FLAG_APPLAYER;
return 0;
}
static int DetectAppLayerEventSetupP1(DetectEngineCtx *de_ctx, Signature *s, char *arg)
{
DetectAppLayerEventData *data = NULL;
SigMatch *sm = NULL;
AppLayerEventType event_type;
data = DetectAppLayerEventParse(arg, &event_type);
if (data == NULL)
goto error;
sm = SigMatchAlloc();
if (sm == NULL)
goto error;
sm->type = DETECT_AL_APP_LAYER_EVENT;
sm->ctx = (void *)data;
if (s->alproto != ALPROTO_UNKNOWN) {
if (s->alproto != data->alproto) {
SCLogError(SC_ERR_CONFLICTING_RULE_KEYWORDS, "rule contains "
"conflicting keywords needing different alprotos");
goto error;
}
} else {
s->alproto = data->alproto;
}
if (event_type == APP_LAYER_EVENT_TYPE_PACKET) {
SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH);
} else {
/* We push it to this list temporarily. We deal with
* these in DetectAppLayerEventPrepare(). */
SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_APP_EVENT);
s->flags |= SIG_FLAG_APPLAYER;
}
return 0;
error:
if (data)
SCFree(data);
if (sm) {
sm->ctx = NULL;
SigMatchFree(sm);
}
return -1;
}
static void DetectAppLayerEventFree(void *ptr)
{
DetectAppLayerEventData *data = (DetectAppLayerEventData *)ptr;
if (data->arg != NULL)
SCFree(data->arg);
SCFree(ptr);
return;
}
int DetectAppLayerEventPrepare(Signature *s)
{
SigMatch *sm = s->sm_lists[DETECT_SM_LIST_APP_EVENT];
s->sm_lists[DETECT_SM_LIST_APP_EVENT] = NULL;
s->sm_lists_tail[DETECT_SM_LIST_APP_EVENT] = NULL;
while (sm != NULL) {
sm->next = sm->prev = NULL;
if (DetectAppLayerEventSetupP2(s, sm) < 0)
return -1;
sm = sm->next;
}
return 0;
}
/**********************************Unittests***********************************/
#ifdef UNITTESTS /* UNITTESTS */
#include "stream-tcp-private.h"
#include "stream-tcp-reassemble.h"
#include "stream-tcp.h"
#include "app-layer.h"
#define APP_LAYER_EVENT_TEST_MAP_EVENT1 0
#define APP_LAYER_EVENT_TEST_MAP_EVENT2 1
#define APP_LAYER_EVENT_TEST_MAP_EVENT3 2
#define APP_LAYER_EVENT_TEST_MAP_EVENT4 3
#define APP_LAYER_EVENT_TEST_MAP_EVENT5 4
#define APP_LAYER_EVENT_TEST_MAP_EVENT6 5
SCEnumCharMap app_layer_event_test_map[ ] = {
{ "event1", APP_LAYER_EVENT_TEST_MAP_EVENT1 },
{ "event2", APP_LAYER_EVENT_TEST_MAP_EVENT2 },
{ "event3", APP_LAYER_EVENT_TEST_MAP_EVENT3 },
{ "event4", APP_LAYER_EVENT_TEST_MAP_EVENT4 },
{ "event5", APP_LAYER_EVENT_TEST_MAP_EVENT5 },
{ "event6", APP_LAYER_EVENT_TEST_MAP_EVENT6 },
};
static int DetectAppLayerEventTestGetEventInfo(const char *event_name,
int *event_id,
AppLayerEventType *event_type)
{
*event_id = SCMapEnumNameToValue(event_name, app_layer_event_test_map);
if (*event_id == -1) {
SCLogError(SC_ERR_INVALID_ENUM_MAP, "event \"%s\" not present in "
"app-layer-event's test enum map table.", event_name);
/* this should be treated as fatal */
return -1;
}
*event_type = APP_LAYER_EVENT_TYPE_GENERAL;
return 0;
}
int DetectAppLayerEventTest01(void)
{
AppLayerParserBackupParserTable();
AppLayerParserRegisterGetEventInfo(IPPROTO_TCP, ALPROTO_SMTP,
DetectAppLayerEventTestGetEventInfo);
AppLayerEventType event_type;
int result = 0;
uint8_t ipproto_bitarray[256 / 8];
memset(ipproto_bitarray, 0, sizeof(ipproto_bitarray));
ipproto_bitarray[IPPROTO_TCP / 8] |= 1 << (IPPROTO_TCP % 8);
DetectAppLayerEventData *aled = DetectAppLayerEventParse("smtp.event1",
&event_type);
if (aled == NULL)
goto end;
if (DetectAppLayerEventParseAppP2(aled, ipproto_bitarray, &event_type) < 0) {
printf("failure 1\n");
goto end;
}
if (aled->alproto != ALPROTO_SMTP ||
aled->event_id != APP_LAYER_EVENT_TEST_MAP_EVENT1) {
printf("test failure. Holding wrong state\n");
goto end;
}
result = 1;
end:
AppLayerParserRestoreParserTable();
if (aled != NULL)
DetectAppLayerEventFree(aled);
return result;
}
int DetectAppLayerEventTest02(void)
{
AppLayerParserBackupParserTable();
AppLayerParserRegisterGetEventInfo(IPPROTO_TCP, ALPROTO_SMTP,
DetectAppLayerEventTestGetEventInfo);
AppLayerParserRegisterGetEventInfo(IPPROTO_TCP, ALPROTO_HTTP,
DetectAppLayerEventTestGetEventInfo);
AppLayerParserRegisterGetEventInfo(IPPROTO_TCP, ALPROTO_SMB,
DetectAppLayerEventTestGetEventInfo);
AppLayerParserRegisterGetEventInfo(IPPROTO_TCP, ALPROTO_FTP,
DetectAppLayerEventTestGetEventInfo);
AppLayerEventType event_type;
int result = 0;
uint8_t ipproto_bitarray[256 / 8];
memset(ipproto_bitarray, 0, sizeof(ipproto_bitarray));
ipproto_bitarray[IPPROTO_TCP / 8] |= 1 << (IPPROTO_TCP % 8);
DetectAppLayerEventData *aled = DetectAppLayerEventParse("smtp.event1",
&event_type);
if (aled == NULL)
goto end;
if (DetectAppLayerEventParseAppP2(aled, ipproto_bitarray, &event_type) < 0) {
printf("failure 1\n");
goto end;
}
if (aled->alproto != ALPROTO_SMTP ||
aled->event_id != APP_LAYER_EVENT_TEST_MAP_EVENT1) {
printf("test failure. Holding wrong state\n");
goto end;
}
aled = DetectAppLayerEventParse("smtp.event4",
&event_type);
if (aled == NULL)
goto end;
if (DetectAppLayerEventParseAppP2(aled, ipproto_bitarray, &event_type) < 0) {
printf("failure 1\n");
goto end;
}
if (aled->alproto != ALPROTO_SMTP ||
aled->event_id != APP_LAYER_EVENT_TEST_MAP_EVENT4) {
printf("test failure. Holding wrong state\n");
goto end;
}
aled = DetectAppLayerEventParse("http.event2",
&event_type);
if (aled == NULL)
goto end;
if (DetectAppLayerEventParseAppP2(aled, ipproto_bitarray, &event_type) < 0) {
printf("failure 1\n");
goto end;
}
if (aled->alproto != ALPROTO_HTTP ||
aled->event_id != APP_LAYER_EVENT_TEST_MAP_EVENT2) {
printf("test failure. Holding wrong state\n");
goto end;
}
aled = DetectAppLayerEventParse("smb.event3",
&event_type);
if (aled == NULL)
goto end;
if (DetectAppLayerEventParseAppP2(aled, ipproto_bitarray, &event_type) < 0) {
printf("failure 1\n");
goto end;
}
if (aled->alproto != ALPROTO_SMB ||
aled->event_id != APP_LAYER_EVENT_TEST_MAP_EVENT3) {
printf("test failure. Holding wrong state\n");
goto end;
}
aled = DetectAppLayerEventParse("ftp.event5",
&event_type);
if (aled == NULL)
goto end;
if (DetectAppLayerEventParseAppP2(aled, ipproto_bitarray, &event_type) < 0) {
printf("failure 1\n");
goto end;
}
if (aled->alproto != ALPROTO_FTP ||
aled->event_id != APP_LAYER_EVENT_TEST_MAP_EVENT5) {
printf("test failure. Holding wrong state\n");
goto end;
}
result = 1;
end:
AppLayerParserRestoreParserTable();
if (aled != NULL)
DetectAppLayerEventFree(aled);
return result;
}
int DetectAppLayerEventTest03(void)
{
int result = 0;
ThreadVars tv;
TcpReassemblyThreadCtx *ra_ctx = NULL;
Packet *p = NULL;
Flow *f = NULL;
TcpSession ssn;
TcpStream stream_ts, stream_tc;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
uint8_t buf_ts[] = "GET /index.html HTTP/1.1\r\n"
"Host: 127.0.0.1\r\n"
"User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.3) Gecko/20100402 Firefox/3.6.3\r\n"
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
"Accept-Language: en-us,en;q=0.5\r\n"
"Accept-Encoding: gzip,deflate\r\n"
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n"
"Keep-Alive: 115\r\n"
"Connection: keep-alive\r\n"
"\r\n";
uint8_t buf_tc[] = "HTTP/1.1 200 OK\r\n"
"Date: Fri, 22 Oct 2010 12:31:08 GMT\r\n"
"Server: Apache/2.2.15 (Unix) DAV/2\r\n"
"Last-Modified: Sat, 20 Nov 2004 20:16:24 GMT\r\n"
"ETag: \"ab8486-2c-3e9564c23b600\"\r\n"
"Accept-Ranges: bytes\r\n"
"Content-Length: 44\r\n"
"Keep-Alive: timeout=5, max=100\r\n"
"Connection: Keep-Alive\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>It works!</h1></body></html>";
memset(&tv, 0, sizeof (ThreadVars));
memset(&ssn, 0, sizeof(TcpSession));
memset(&stream_ts, 0, sizeof(TcpStream));
memset(&stream_tc, 0, sizeof(TcpStream));
ssn.data_first_seen_dir = STREAM_TOSERVER;
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(app-layer-event: applayer_mismatch_protocol_both_directions; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&tv, (void *)de_ctx, (void *)&det_ctx);
f = UTHBuildFlow(AF_INET, "1.2.3.4", "1.2.3.5", 200, 220);
if (f == NULL)
goto end;
FLOW_INITIALIZE(f);
f->protoctx = &ssn;
f->proto = IPPROTO_TCP;
f->flags |= FLOW_IPV4;
p = PacketGetFromAlloc();
if (unlikely(p == NULL))
goto end;
p->flow = f;
p->src.family = AF_INET;
p->dst.family = AF_INET;
p->proto = IPPROTO_TCP;
ra_ctx = StreamTcpReassembleInitThreadCtx(&tv);
if (ra_ctx == NULL)
goto end;
StreamTcpInitConfig(TRUE);
p->flowflags = FLOW_PKT_TOSERVER;
if (AppLayerHandleTCPData(&tv, ra_ctx, p, f, &ssn, &stream_ts, buf_ts,
sizeof(buf_ts), STREAM_TOSERVER | STREAM_START) < 0) {
printf("AppLayerHandleTCPData failure\n");
goto end;
}
SigMatchSignatures(&tv, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have\n");
goto end;
}
p->flowflags = FLOW_PKT_TOCLIENT;
if (AppLayerHandleTCPData(&tv, ra_ctx, p, f, &ssn, &stream_tc, buf_tc,
sizeof(buf_tc), STREAM_TOCLIENT | STREAM_START) < 0) {
printf("AppLayerHandleTCPData failure\n");
goto end;
}
SigMatchSignatures(&tv, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have\n");
goto end;
}
result = 1;
end:
return result;
}
int DetectAppLayerEventTest04(void)
{
int result = 0;
ThreadVars tv;
TcpReassemblyThreadCtx *ra_ctx = NULL;
Packet *p = NULL;
Flow *f = NULL;
TcpSession ssn;
TcpStream stream_ts, stream_tc;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
uint8_t buf_ts[] = "GET /index.html HTTP/1.1\r\n"
"Host: 127.0.0.1\r\n"
"User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.3) Gecko/20100402 Firefox/3.6.3\r\n"
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
"Accept-Language: en-us,en;q=0.5\r\n"
"Accept-Encoding: gzip,deflate\r\n"
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n"
"Keep-Alive: 115\r\n"
"Connection: keep-alive\r\n"
"\r\n";
uint8_t buf_tc[] = "XTTP/1.1 200 OK\r\n"
"Date: Fri, 22 Oct 2010 12:31:08 GMT\r\n"
"Server: Apache/2.2.15 (Unix) DAV/2\r\n"
"Last-Modified: Sat, 20 Nov 2004 20:16:24 GMT\r\n"
"ETag: \"ab8486-2c-3e9564c23b600\"\r\n"
"Accept-Ranges: bytes\r\n"
"Content-Length: 44\r\n"
"Keep-Alive: timeout=5, max=100\r\n"
"Connection: Keep-Alive\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>It works!</h1></body></html>";
memset(&tv, 0, sizeof (ThreadVars));
memset(&ssn, 0, sizeof(TcpSession));
memset(&stream_ts, 0, sizeof(TcpStream));
memset(&stream_tc, 0, sizeof(TcpStream));
ssn.data_first_seen_dir = STREAM_TOSERVER;
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(app-layer-event: applayer_detect_protocol_only_one_direction; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&tv, (void *)de_ctx, (void *)&det_ctx);
f = UTHBuildFlow(AF_INET, "1.2.3.4", "1.2.3.5", 200, 220);
if (f == NULL)
goto end;
FLOW_INITIALIZE(f);
f->protoctx = &ssn;
f->proto = IPPROTO_TCP;
f->flags |= FLOW_IPV4;
p = PacketGetFromAlloc();
if (unlikely(p == NULL))
goto end;
p->flow = f;
p->src.family = AF_INET;
p->dst.family = AF_INET;
p->proto = IPPROTO_TCP;
ra_ctx = StreamTcpReassembleInitThreadCtx(&tv);
if (ra_ctx == NULL)
goto end;
StreamTcpInitConfig(TRUE);
p->flowflags = FLOW_PKT_TOSERVER;
if (AppLayerHandleTCPData(&tv, ra_ctx, p, f, &ssn, &stream_ts, buf_ts,
sizeof(buf_ts), STREAM_TOSERVER | STREAM_START) < 0) {
printf("AppLayerHandleTCPData failure\n");
goto end;
}
SigMatchSignatures(&tv, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have\n");
goto end;
}
p->flowflags = FLOW_PKT_TOCLIENT;
if (AppLayerHandleTCPData(&tv, ra_ctx, p, f, &ssn, &stream_tc, buf_tc,
sizeof(buf_tc), STREAM_TOCLIENT | STREAM_START) < 0) {
printf("AppLayerHandleTCPData failure\n");
goto end;
}
SigMatchSignatures(&tv, de_ctx, det_ctx, p);
if (!PacketAlertCheck(p, 1)) {
printf("sid 1 didn't match but should have\n");
goto end;
}
result = 1;
end:
return result;
}
int DetectAppLayerEventTest05(void)
{
int result = 0;
ThreadVars tv;
TcpReassemblyThreadCtx *ra_ctx = NULL;
Packet *p = NULL;
Flow *f = NULL;
TcpSession ssn;
TcpStream stream_ts, stream_tc;
DetectEngineCtx *de_ctx = NULL;
DetectEngineThreadCtx *det_ctx = NULL;
uint8_t buf_ts[] = "GET /index.html HTTP/1.1\r\n"
"Host: 127.0.0.1\r\n"
"User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.3) Gecko/20100402 Firefox/3.6.3\r\n"
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n"
"Accept-Language: en-us,en;q=0.5\r\n"
"Accept-Encoding: gzip,deflate\r\n"
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n"
"Keep-Alive: 115\r\n"
"Connection: keep-alive\r\n"
"\r\n";
/* tls */
uint8_t buf_tc[] = {
0x16, 0x03, 0x01, 0x00, 0x86, 0x10, 0x00, 0x00,
0x82, 0x00, 0x80, 0xd3, 0x6f, 0x1f, 0x63, 0x82,
0x8d, 0x75, 0x77, 0x8c, 0x91, 0xbc, 0xa1, 0x3d,
0xbb, 0xe1, 0xb5, 0xd3, 0x31, 0x92, 0x59, 0x2b,
0x2c, 0x43, 0x96, 0xa3, 0xaa, 0x23, 0x92, 0xd0,
0x91, 0x2a, 0x5e, 0x10, 0x5b, 0xc8, 0xc1, 0xe2,
0xd3, 0x5c, 0x8b, 0x8c, 0x91, 0x9e, 0xc2, 0xf2,
0x9c, 0x3c, 0x4f, 0x37, 0x1e, 0x20, 0x5e, 0x33,
0xd5, 0xf0, 0xd6, 0xaf, 0x89, 0xf5, 0xcc, 0xb2,
0xcf, 0xc1, 0x60, 0x3a, 0x46, 0xd5, 0x4e, 0x2a,
0xb6, 0x6a, 0xb9, 0xfc, 0x32, 0x8b, 0xe0, 0x6e,
0xa0, 0xed, 0x25, 0xa0, 0xa4, 0x82, 0x81, 0x73,
0x90, 0xbf, 0xb5, 0xde, 0xeb, 0x51, 0x8d, 0xde,
0x5b, 0x6f, 0x94, 0xee, 0xba, 0xe5, 0x69, 0xfa,
0x1a, 0x80, 0x30, 0x54, 0xeb, 0x12, 0x01, 0xb9,
0xfe, 0xbf, 0x82, 0x95, 0x01, 0x7b, 0xb0, 0x97,
0x14, 0xc2, 0x06, 0x3c, 0x69, 0xfb, 0x1c, 0x66,
0x47, 0x17, 0xd9, 0x14, 0x03, 0x01, 0x00, 0x01,
0x01, 0x16, 0x03, 0x01, 0x00, 0x30, 0xf6, 0xbc,
0x0d, 0x6f, 0xe8, 0xbb, 0xaa, 0xbf, 0x14, 0xeb,
0x7b, 0xcc, 0x6c, 0x28, 0xb0, 0xfc, 0xa6, 0x01,
0x2a, 0x97, 0x96, 0x17, 0x5e, 0xe8, 0xb4, 0x4e,
0x78, 0xc9, 0x04, 0x65, 0x53, 0xb6, 0x93, 0x3d,
0xeb, 0x44, 0xee, 0x86, 0xf9, 0x80, 0x49, 0x45,
0x21, 0x34, 0xd1, 0xee, 0xc8, 0x9c,
};
memset(&tv, 0, sizeof (ThreadVars));
memset(&ssn, 0, sizeof(TcpSession));
memset(&stream_ts, 0, sizeof(TcpStream));
memset(&stream_tc, 0, sizeof(TcpStream));
ssn.data_first_seen_dir = STREAM_TOSERVER;
de_ctx = DetectEngineCtxInit();
if (de_ctx == NULL)
goto end;
de_ctx->flags |= DE_QUIET;
de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
"(app-layer-event: applayer_mismatch_protocol_both_directions; "
"sid:1;)");
if (de_ctx->sig_list == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&tv, (void *)de_ctx, (void *)&det_ctx);
f = UTHBuildFlow(AF_INET, "1.2.3.4", "1.2.3.5", 200, 220);
if (f == NULL)
goto end;
FLOW_INITIALIZE(f);
f->protoctx = &ssn;
f->proto = IPPROTO_TCP;
f->flags |= FLOW_IPV4;
p = PacketGetFromAlloc();
if (unlikely(p == NULL))
goto end;
p->flow = f;
p->src.family = AF_INET;
p->dst.family = AF_INET;
p->proto = IPPROTO_TCP;
ra_ctx = StreamTcpReassembleInitThreadCtx(&tv);
if (ra_ctx == NULL)
goto end;
StreamTcpInitConfig(TRUE);
p->flowflags = FLOW_PKT_TOSERVER;
if (AppLayerHandleTCPData(&tv, ra_ctx, p, f, &ssn, &stream_ts, buf_ts,
sizeof(buf_ts), STREAM_TOSERVER | STREAM_START) < 0) {
printf("AppLayerHandleTCPData failure\n");
goto end;
}
SigMatchSignatures(&tv, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1)) {
printf("sid 1 matched but shouldn't have\n");
goto end;
}
p->flowflags = FLOW_PKT_TOCLIENT;
if (AppLayerHandleTCPData(&tv, ra_ctx, p, f, &ssn, &stream_tc, buf_tc,
sizeof(buf_tc), STREAM_TOCLIENT | STREAM_START) < 0) {
printf("AppLayerHandleTCPData failure\n");
goto end;
}
SigMatchSignatures(&tv, de_ctx, det_ctx, p);
if (!PacketAlertCheck(p, 1)) {
printf("sid 1 didn't match but should have\n");
goto end;
}
result = 1;
end:
return result;
}
#endif /* UNITTESTS */
/**
* \brief This function registers unit tests for "app-layer-event" keyword.
*/
void DetectAppLayerEventRegisterTests(void)
{
#ifdef UNITTESTS /* UNITTESTS */
UtRegisterTest("DetectAppLayerEventTest01", DetectAppLayerEventTest01, 1);
UtRegisterTest("DetectAppLayerEventTest02", DetectAppLayerEventTest02, 1);
UtRegisterTest("DetectAppLayerEventTest03", DetectAppLayerEventTest03, 1);
UtRegisterTest("DetectAppLayerEventTest04", DetectAppLayerEventTest04, 1);
UtRegisterTest("DetectAppLayerEventTest05", DetectAppLayerEventTest05, 1);
#endif /* UNITTESTS */
return;
}