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/* Copyright (C) 2007-2021 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 decode
*
* @{
*/
/**
* \file
*
* \author William Metcalf <william.metcalf@gmail.com>
*
* Decode RAW
*/
#include "suricata-common.h"
#include "decode-raw.h"
#include "decode.h"
#include "decode-events.h"
#include "util-validate.h"
#include "util-unittest.h"
#include "util-debug.h"
int DecodeRaw(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p,
const uint8_t *pkt, uint32_t len)
{
DEBUG_VALIDATE_BUG_ON(pkt == NULL);
StatsIncr(tv, dtv->counter_raw);
/* If it is ipv4 or ipv6 it should at least be the size of ipv4 */
if (unlikely(len < IPV4_HEADER_LEN)) {
ENGINE_SET_INVALID_EVENT(p, IPV4_PKT_TOO_SMALL);
return TM_ECODE_FAILED;
}
if (IP_GET_RAW_VER(pkt) == 4) {
if (unlikely(GET_PKT_LEN(p) > USHRT_MAX)) {
return TM_ECODE_FAILED;
}
SCLogDebug("IPV4 Packet");
DecodeIPV4(tv, dtv, p, GET_PKT_DATA(p), (uint16_t)(GET_PKT_LEN(p)));
} else if (IP_GET_RAW_VER(pkt) == 6) {
if (unlikely(GET_PKT_LEN(p) > USHRT_MAX)) {
return TM_ECODE_FAILED;
}
SCLogDebug("IPV6 Packet");
DecodeIPV6(tv, dtv, p, GET_PKT_DATA(p), (uint16_t)(GET_PKT_LEN(p)));
} else {
SCLogDebug("Unknown ip version %d", IP_GET_RAW_VER(pkt));
ENGINE_SET_EVENT(p,IPRAW_INVALID_IPV);
}
return TM_ECODE_OK;
}
#ifdef UNITTESTS
#include "util-unittest-helper.h"
#include "packet.h"
/** DecodeRawtest01
* \brief Valid Raw packet
* \retval 0 Expected test value
*/
static int DecodeRawTest01 (void)
{
/* IPV6/TCP/no eth header */
uint8_t raw_ip[] = {
0x60, 0x00, 0x00, 0x00, 0x00, 0x28, 0x06, 0x40,
0x20, 0x01, 0x06, 0x18, 0x04, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x51, 0x99, 0xcc, 0x70,
0x20, 0x01, 0x06, 0x18, 0x00, 0x01, 0x80, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05,
0x8c, 0x9b, 0x00, 0x50, 0x6a, 0xe7, 0x07, 0x36,
0x00, 0x00, 0x00, 0x00, 0xa0, 0x02, 0x16, 0x30,
0x29, 0x9c, 0x00, 0x00, 0x02, 0x04, 0x05, 0x8c,
0x04, 0x02, 0x08, 0x0a, 0x00, 0xdd, 0x1a, 0x39,
0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x02 };
Packet *p = PacketGetFromAlloc();
if (unlikely(p == NULL))
return 0;
ThreadVars tv;
DecodeThreadVars dtv;
memset(&dtv, 0, sizeof(DecodeThreadVars));
memset(&tv, 0, sizeof(ThreadVars));
if (PacketCopyData(p, raw_ip, sizeof(raw_ip)) == -1) {
SCFree(p);
return 0;
}
FlowInitConfig(FLOW_QUIET);
DecodeRaw(&tv, &dtv, p, raw_ip, GET_PKT_LEN(p));
if (p->ip6h == NULL) {
printf("expected a valid ipv6 header but it was NULL: ");
FlowShutdown();
SCFree(p);
return 0;
}
PacketRecycle(p);
FlowShutdown();
SCFree(p);
return 1;
}
/** DecodeRawtest02
* \brief Valid Raw packet
* \retval 0 Expected test value
*/
static int DecodeRawTest02 (void)
{
/* IPV4/TCP/no eth header */
uint8_t raw_ip[] = {
0x45, 0x00, 0x00, 0x30, 0x00, 0xad, 0x40, 0x00,
0x7f, 0x06, 0xac, 0xc5, 0xc0, 0xa8, 0x67, 0x02,
0xc0, 0xa8, 0x66, 0x02, 0x0b, 0xc7, 0x00, 0x50,
0x1d, 0xb3, 0x12, 0x37, 0x00, 0x00, 0x00, 0x00,
0x70, 0x02, 0x40, 0x00, 0xb8, 0xc8, 0x00, 0x00,
0x02, 0x04, 0x05, 0xb4, 0x01, 0x01, 0x04, 0x02 };
Packet *p = PacketGetFromAlloc();
if (unlikely(p == NULL))
return 0;
ThreadVars tv;
DecodeThreadVars dtv;
memset(&dtv, 0, sizeof(DecodeThreadVars));
memset(&tv, 0, sizeof(ThreadVars));
if (PacketCopyData(p, raw_ip, sizeof(raw_ip)) == -1) {
SCFree(p);
return 0;
}
FlowInitConfig(FLOW_QUIET);
DecodeRaw(&tv, &dtv, p, raw_ip, GET_PKT_LEN(p));
if (p->ip4h == NULL) {
printf("expected a valid ipv4 header but it was NULL: ");
PacketRecycle(p);
FlowShutdown();
SCFree(p);
return 0;
}
PacketRecycle(p);
FlowShutdown();
SCFree(p);
return 1;
}
/** DecodeRawtest03
* \brief Valid Raw packet
* \retval 0 Expected test value
*/
static int DecodeRawTest03 (void)
{
/* IPV13 */
uint8_t raw_ip[] = {
0xdf, 0x00, 0x00, 0x3d, 0x49, 0x42, 0x40, 0x00,
0x40, 0x06, 0xcf, 0x8a, 0x0a, 0x1f, 0x03, 0xaf,
0x0a, 0x1f, 0x0a, 0x02, 0xa5, 0xe7, 0xde, 0xad,
0x00, 0x0c, 0xe2, 0x0e, 0x8b, 0xfe, 0x0c, 0xe7,
0x80, 0x18, 0x00, 0xb7, 0xaf, 0xeb, 0x00, 0x00,
0x01, 0x01, 0x08, 0x0a, 0x00, 0x08, 0xab, 0x4f,
0x34, 0x40, 0x67, 0x31, 0x3b, 0x63, 0x61, 0x74,
0x20, 0x6b, 0x65, 0x79, 0x3b };
Packet *p = PacketGetFromAlloc();
if (unlikely(p == NULL))
return 0;
ThreadVars tv;
DecodeThreadVars dtv;
memset(&dtv, 0, sizeof(DecodeThreadVars));
memset(&tv, 0, sizeof(ThreadVars));
if (PacketCopyData(p, raw_ip, sizeof(raw_ip)) == -1) {
SCFree(p);
return 0;
}
FlowInitConfig(FLOW_QUIET);
DecodeRaw(&tv, &dtv, p, raw_ip, GET_PKT_LEN(p));
if (!ENGINE_ISSET_EVENT(p,IPRAW_INVALID_IPV)) {
printf("expected IPRAW_INVALID_IPV to be set but it wasn't: ");
FlowShutdown();
SCFree(p);
return 0;
}
PacketRecycle(p);
FlowShutdown();
SCFree(p);
return 1;
}
#endif /* UNITTESTS */
/**
* \brief Registers Raw unit tests
* \todo More Raw tests
*/
void DecodeRawRegisterTests(void)
{
#ifdef UNITTESTS
UtRegisterTest("DecodeRawTest01", DecodeRawTest01);
UtRegisterTest("DecodeRawTest02", DecodeRawTest02);
UtRegisterTest("DecodeRawTest03", DecodeRawTest03);
#endif /* UNITTESTS */
}
/**
* @}
*/
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