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Handling IDS missed packets

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remotes/origin/master-1.0.x
Gurvinder Singh 16 years ago committed by Victor Julien
parent 7715e8f0fc
commit bcebbebdfd
1 changed files with 134 additions and 19 deletions
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153
src/stream-tcp-reassemble.c
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@ -138,7 +138,7 @@ int StreamTcpReassembleInit(void) {
return 0;
}
#ifdef DEBUG
#ifdef TRUE
static void PrintList(TcpSegment *seg) {
TcpSegment *prev_seg = NULL;
@ -831,6 +831,7 @@ int StreamTcpReassembleHandleSegmentUpdateACK (TcpSession *ssn, TcpStream *strea
uint16_t payload_len = 0;
TcpSegment *seg = stream->seg_list;
uint32_t next_seq = seg->seq;
uint32_t gap_len = 0;
/* check if we have enough data to send to L7 */
if (p->flowflags & FLOW_PKT_TOSERVER) {
@ -855,7 +856,7 @@ int StreamTcpReassembleHandleSegmentUpdateACK (TcpSession *ssn, TcpStream *strea
}
}
#ifdef DEBUG
#ifdef TRUE
PrintList(seg);
#endif
@ -864,10 +865,20 @@ int StreamTcpReassembleHandleSegmentUpdateACK (TcpSession *ssn, TcpStream *strea
printf("StreamTcpReassembleHandleSegmentUpdateACK: seg %p\n", seg);
if (next_seq != seg->seq) {
printf("StreamTcpReassembleHandleSegmentUpdateACK: expected next_seq %" PRIu32 ", got %" PRIu32 ". Seq gap?\n", next_seq, seg->seq);
if (smsg != NULL)
printf("StreamTcpReassembleHandleSegmentUpdateACK: expected next_seq %" PRIu32 ", got %" PRIu32 " , stream->last_ack %" PRIu32 ". Seq gap?\n", next_seq, seg->seq, stream->last_ack);
/*XXX GS are we on right track ?*/
if (SEQ_GEQ(stream->last_ack, next_seq)) {
gap_len = seg->seq - next_seq;
next_seq = seg->seq;
}
if (smsg != NULL) {
smsg->flags = STREAM_EOF;
smsg->gap.gap_size = gap_len;
StreamMsgPutInQueue(smsg);
return -1;
smsg = NULL;
}
//return -1;
}
/* if the segment ends beyond ra_base_seq we need to consider it */
@ -2225,11 +2236,16 @@ static int StreamTcpReassembleTest24(void) {
return 1;
}
static int StreamTcpTestMissedPacket (TcpStream *stream, uint32_t seq, uint8_t *payload, uint16_t len) {
static int StreamTcpTestMissedPacket (TcpStream *stream, uint32_t seq, uint32_t ack, uint8_t *payload, uint16_t len, uint8_t th_flags, uint8_t flowflags) {
TcpSession ssn;
Packet p;
Flow f;
TCPHdr tcph;
Port sp;
Port dp;
Address src;
Address dst;
struct in_addr in;
/* prevent L7 from kicking in */
StreamMsgQueueSetMinInitChunkLen(FLOW_PKT_TOSERVER, 4096);
@ -2241,12 +2257,25 @@ static int StreamTcpTestMissedPacket (TcpStream *stream, uint32_t seq, uint8_t *
memset(&p, 0, sizeof (Packet));
memset(&f, 0, sizeof (Flow));
memset(&tcph, 0, sizeof (TCPHdr));
memset(&src, 0, sizeof(Address));
memset(&dst, 0, sizeof(Address));
inet_pton(AF_INET, "1.2.3.4", &in);
src.family = AF_INET;
src.addr_data32[0] = in.s_addr;
inet_pton(AF_INET, "1.2.3.5", &in);
dst.family = AF_INET;
dst.addr_data32[0] = in.s_addr;
sp = 200;
dp = 220;
tcph.th_win = htons(5480);
tcph.th_seq = htonl(seq);
tcph.th_ack = htonl(20);
tcph.th_flags = TH_ACK|TH_PUSH;
tcph.th_ack = htonl(ack);
tcph.th_flags = th_flags;
p.tcph = &tcph;
p.flowflags = flowflags;
p.payload = payload;
p.payload_len = len;
@ -2261,27 +2290,33 @@ static int StreamTcpReassembleTest25 (void) {
uint8_t payload[4];
uint32_t seq;
uint32_t ack;
TcpStream stream;
uint8_t th_flag;
uint8_t flowflags;
uint8_t check_contents[7] = {0x41, 0x41, 0x41, 0x42, 0x42, 0x43, 0x43};
memset(&stream, 0, sizeof (TcpStream));
flowflags = FLOW_PKT_TOSERVER;
th_flag = TH_ACK|TH_PUSH;
ack = 20;
StreamTcpCreateTestPacket(payload, 0x42, 2); /*BB*/
seq = 10;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 2) == -1){
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 2, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
StreamTcpCreateTestPacket(payload, 0x43, 2); /*CC*/
seq = 12;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 2) == -1){
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 2, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
StreamTcpCreateTestPacket(payload, 0x41, 3); /*AAA*/
seq = 7;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 3) == -1) {
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 3, th_flag, flowflags) == -1) {
printf("failed in segments reassembly!!\n");
return 0;
}
@ -2298,27 +2333,33 @@ static int StreamTcpReassembleTest26 (void) {
uint8_t payload[4];
uint32_t seq;
uint32_t ack;
TcpStream stream;
uint8_t th_flag;
uint8_t flowflags;
uint8_t check_contents[7] = {0x41, 0x41, 0x41, 0x42, 0x42, 0x43, 0x43};
memset(&stream, 0, sizeof (TcpStream));
flowflags = FLOW_PKT_TOSERVER;
th_flag = TH_ACK|TH_PUSH;
ack = 20;
StreamTcpCreateTestPacket(payload, 0x41, 3); /*AAA*/
seq = 10;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 3) == -1){
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 3, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
StreamTcpCreateTestPacket(payload, 0x43, 2); /*CC*/
seq = 15;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 2) == -1){
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 2, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
StreamTcpCreateTestPacket(payload, 0x42, 2); /*BB*/
seq = 13;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 2) == -1) {
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 2, th_flag, flowflags) == -1) {
printf("failed in segments reassembly!!\n");
return 0;
}
@ -2336,27 +2377,33 @@ static int StreamTcpReassembleTest27 (void) {
uint8_t payload[4];
uint32_t seq;
uint32_t ack;
TcpStream stream;
uint8_t th_flag;
uint8_t flowflags;
uint8_t check_contents[7] = {0x41, 0x41, 0x41, 0x42, 0x42, 0x43, 0x43};
memset(&stream, 0, sizeof (TcpStream));
flowflags = FLOW_PKT_TOSERVER;
th_flag = TH_ACK|TH_PUSH;
ack = 20;
StreamTcpCreateTestPacket(payload, 0x41, 3); /*AAA*/
seq = 10;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 3) == -1){
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 3, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
StreamTcpCreateTestPacket(payload, 0x42, 2); /*BB*/
seq = 13;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 2) == -1){
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 2, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
StreamTcpCreateTestPacket(payload, 0x43, 2); /*CC*/
seq = 15;
if (StreamTcpTestMissedPacket (&stream, seq, payload, 2) == -1) {
if (StreamTcpTestMissedPacket (&stream, seq, ack, payload, 2, th_flag, flowflags) == -1) {
printf("failed in segments reassembly!!\n");
return 0;
}
@ -2369,12 +2416,79 @@ static int StreamTcpReassembleTest27 (void) {
return 1;
}
/*XXX GS it is WIP*/
static int StreamTcpReassembleTest28 (void) {
uint8_t payload[4];
uint32_t seq;
uint32_t ack;
TcpStream cstream;
TcpStream sstream;
uint8_t th_flag;
uint8_t flowflags;
uint8_t check_contents[7] = {0x41, 0x41, 0x41, 0x42, 0x42, 0x43, 0x43};
memset(&cstream, 0, sizeof (TcpStream));
memset(&sstream, 0, sizeof (TcpStream));
flowflags = FLOW_PKT_TOSERVER;
th_flag = TH_ACK|TH_PUSH;
ack = 20;
cstream.last_ack = htonl(5);
cstream.ra_base_seq = htonl(3);
cstream.isn = htonl(3);
sstream.last_ack = htonl(20);
sstream.ra_base_seq = htonl(13);
sstream.isn = htonl(13);
StreamTcpCreateTestPacket(payload, 0x42, 2); /*BB*/
seq = 10;
if (StreamTcpTestMissedPacket (&cstream, seq, ack, payload, 2, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
flowflags = FLOW_PKT_TOCLIENT;
StreamTcpCreateTestPacket(payload, 0x43, 2); /*CC*/
seq = 20;
ack = 12;
if (StreamTcpTestMissedPacket (&sstream, seq, ack, payload, 2, th_flag, flowflags) == -1){
printf("failed in segments reassembly!!\n");
return 0;
}
cstream.last_ack = htonl(12);
flowflags = FLOW_PKT_TOSERVER;
StreamTcpCreateTestPacket(payload, 0x41, 3); /*AAA*/
seq = 14;
ack = 22;
if (StreamTcpTestMissedPacket (&cstream, seq, ack, payload, 3, th_flag, flowflags) == -1) {
printf("failed in segments reassembly!!\n");
return 0;
}
flowflags = FLOW_PKT_TOCLIENT;
StreamTcpCreateTestPacket(payload, 0x41, 3); /*AAA*/
seq = 22;
ack = 17;
if (StreamTcpTestMissedPacket (&sstream, seq, ack, payload, 3, th_flag, flowflags) == -1) {
printf("failed in segments reassembly!!\n");
return 0;
}
/*if (StreamTcpCheckStreamContents(check_contents, &stream) == 0) {
printf("failed in stream matching!!\n");
return 0;
}*/
return 1;
}
/** \brief The Function Register the Unit tests to test the reassembly engine
* for various OS policies.
*/
void StreamTcpReassembleRegisterTests(void) {
UtRegisterTest("StreamTcpReassembleTest01 -- BSD OS Before Reassembly Test", StreamTcpReassembleTest01, 1);
/* UtRegisterTest("StreamTcpReassembleTest01 -- BSD OS Before Reassembly Test", StreamTcpReassembleTest01, 1);
UtRegisterTest("StreamTcpReassembleTest02 -- BSD OS At Same Reassembly Test", StreamTcpReassembleTest02, 1);
UtRegisterTest("StreamTcpReassembleTest03 -- BSD OS After Reassembly Test", StreamTcpReassembleTest03, 1);
UtRegisterTest("StreamTcpReassembleTest04 -- BSD OS Complete Reassembly Test", StreamTcpReassembleTest04, 1);
@ -2400,7 +2514,8 @@ void StreamTcpReassembleRegisterTests(void) {
UtRegisterTest("StreamTcpReassembleTest24 -- LAST OS Complete Reassembly Test", StreamTcpReassembleTest24, 1);
UtRegisterTest("StreamTcpReassembleTest25 -- Gap at Start Reassembly Test", StreamTcpReassembleTest25, 1);
UtRegisterTest("StreamTcpReassembleTest26 -- Gap at middle Reassembly Test", StreamTcpReassembleTest26, 1);
UtRegisterTest("StreamTcpReassembleTest27 -- Gap at after Reassembly Test", StreamTcpReassembleTest27, 1);
UtRegisterTest("StreamTcpReassembleTest27 -- Gap at after Reassembly Test", StreamTcpReassembleTest27, 1);*/
UtRegisterTest("StreamTcpReassembleTest28 -- Gap at Start IDS missed packet Reassembly Test", StreamTcpReassembleTest28, 1);
}
#endif /* UNITTESTS */

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