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/* Copyright (C) 2007-2011 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 Victor Julien <victor@inliniac.net>
*
* Helper functions for the stream engine.
*/
#include "suricata-common.h"
#include "stream-tcp-reassemble.h"
#include "stream-tcp-inline.h"
#include "stream-tcp.h"
#include "stream-tcp-util.h"
#include "util-memcmp.h"
#include "util-print.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#ifdef UNITTESTS
/* unittest helper functions */
extern int stream_inline;
void StreamTcpUTInit(TcpReassemblyThreadCtx **ra_ctx)
{
StreamTcpInitConfig(TRUE);
*ra_ctx = StreamTcpReassembleInitThreadCtx(NULL);
}
void StreamTcpUTDeinit(TcpReassemblyThreadCtx *ra_ctx)
{
StreamTcpReassembleFreeThreadCtx(ra_ctx);
StreamTcpFreeConfig(TRUE);
stream_inline = 0;
}
void StreamTcpUTInitInline(void) {
stream_inline = 1;
}
void StreamTcpUTSetupSession(TcpSession *ssn)
{
memset(ssn, 0x00, sizeof(TcpSession));
}
void StreamTcpUTClearSession(TcpSession *ssn)
{
StreamTcpUTClearStream(&ssn->client);
StreamTcpUTClearStream(&ssn->server);
}
void StreamTcpUTSetupStream(TcpStream *s, uint32_t isn)
{
memset(s, 0x00, sizeof(TcpStream));
s->isn = isn;
STREAMTCP_SET_RA_BASE_SEQ(s, isn);
}
void StreamTcpUTClearStream(TcpStream *s)
{
StreamTcpReturnStreamSegments(s);
}
int StreamTcpUTAddSegmentWithPayload(ThreadVars *tv, TcpReassemblyThreadCtx *ra_ctx, TcpStream *stream, uint32_t seq, uint8_t *payload, uint16_t len)
{
TcpSegment *s = StreamTcpGetSegment(tv, ra_ctx, len);
if (s == NULL) {
return -1;
}
s->seq = seq;
s->payload_len = len;
memcpy(s->payload, payload, len);
Packet *p = UTHBuildPacketReal(s->payload, s->payload_len, IPPROTO_TCP, "1.1.1.1", "2.2.2.2", 1024, 80);
if (p == NULL) {
return -1;
}
p->tcph->th_seq = htonl(seq);
if (StreamTcpReassembleInsertSegment(tv, ra_ctx, stream, s, p) < 0)
return -1;
UTHFreePacket(p);
return 0;
}
int StreamTcpUTAddSegmentWithByte(ThreadVars *tv, TcpReassemblyThreadCtx *ra_ctx, TcpStream *stream, uint32_t seq, uint8_t byte, uint16_t len)
{
TcpSegment *s = StreamTcpGetSegment(tv, ra_ctx, len);
if (s == NULL) {
return -1;
}
s->seq = seq;
s->payload_len = len;
memset(s->payload, byte, len);
Packet *p = UTHBuildPacketReal(s->payload, s->payload_len, IPPROTO_TCP, "1.1.1.1", "2.2.2.2", 1024, 80);
if (p == NULL) {
return -1;
}
p->tcph->th_seq = htonl(seq);
if (StreamTcpReassembleInsertSegment(tv, ra_ctx, stream, s, p) < 0)
return -1;
UTHFreePacket(p);
return 0;
}
/* tests */
int StreamTcpUtilTest01(void)
{
int ret = 0;
TcpReassemblyThreadCtx *ra_ctx = NULL;
StreamTcpUTInit(&ra_ctx);
if (ra_ctx == NULL) {
printf("ra_ctx is NULL: ");
goto end;
}
ret = 1;
end:
StreamTcpUTDeinit(ra_ctx);
return ret;
}
int StreamTcpUtilStreamTest01(void)
{
int ret = 0;
TcpReassemblyThreadCtx *ra_ctx = NULL;
ThreadVars tv;
TcpStream stream;
memset(&tv, 0x00, sizeof(tv));
StreamTcpUTInit(&ra_ctx);
StreamTcpUTSetupStream(&stream, 1);
if (StreamTcpUTAddSegmentWithByte(&tv, ra_ctx, &stream, 2, 'A', 5) == -1) {
printf("failed to add segment 1: ");
goto end;
}
if (StreamTcpUTAddSegmentWithByte(&tv, ra_ctx, &stream, 7, 'B', 5) == -1) {
printf("failed to add segment 2: ");
goto end;
}
if (StreamTcpUTAddSegmentWithByte(&tv, ra_ctx, &stream, 12, 'C', 5) == -1) {
printf("failed to add segment 3: ");
goto end;
}
TcpSegment *seg = stream.seg_list;
if (seg->seq != 2) {
printf("first seg in the list should have seq 2: ");
goto end;
}
seg = seg->next;
if (seg->seq != 7) {
printf("first seg in the list should have seq 7: ");
goto end;
}
seg = seg->next;
if (seg->seq != 12) {
printf("first seg in the list should have seq 12: ");
goto end;
}
ret = 1;
end:
StreamTcpUTClearStream(&stream);
StreamTcpUTDeinit(ra_ctx);
return ret;
}
int StreamTcpUtilStreamTest02(void)
{
int ret = 0;
TcpReassemblyThreadCtx *ra_ctx = NULL;
ThreadVars tv;
TcpStream stream;
memset(&tv, 0x00, sizeof(tv));
StreamTcpUTInit(&ra_ctx);
StreamTcpUTSetupStream(&stream, 1);
if (StreamTcpUTAddSegmentWithByte(&tv, ra_ctx, &stream, 7, 'B', 5) == -1) {
printf("failed to add segment 2: ");
goto end;
}
if (StreamTcpUTAddSegmentWithByte(&tv, ra_ctx, &stream, 12, 'C', 5) == -1) {
printf("failed to add segment 3: ");
goto end;
}
if (StreamTcpUTAddSegmentWithByte(&tv, ra_ctx, &stream, 2, 'A', 5) == -1) {
printf("failed to add segment 1: ");
goto end;
}
TcpSegment *seg = stream.seg_list;
if (seg->seq != 2) {
printf("first seg in the list should have seq 2: ");
goto end;
}
seg = seg->next;
if (seg->seq != 7) {
printf("first seg in the list should have seq 7: ");
goto end;
}
seg = seg->next;
if (seg->seq != 12) {
printf("first seg in the list should have seq 12: ");
goto end;
}
ret = 1;
end:
StreamTcpUTClearStream(&stream);
StreamTcpUTDeinit(ra_ctx);
return ret;
}
#endif
void StreamTcpUtilRegisterTests(void)
{
#ifdef UNITTESTS
UtRegisterTest("StreamTcpUtilTest01", StreamTcpUtilTest01, 1);
UtRegisterTest("StreamTcpUtilStreamTest01", StreamTcpUtilStreamTest01, 1);
UtRegisterTest("StreamTcpUtilStreamTest02", StreamTcpUtilStreamTest02, 1);
#endif /* UNITTESTS */
}
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