1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* ssh.c
*
* Copyright (C) 2009-2011 by ipoque GmbH
* Copyright (C) 2011-15 - ntop.org
*
* This file is part of nDPI, an open source deep packet inspection
* library based on the OpenDPI and PACE technology by ipoque GmbH
*
* nDPI is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* nDPI 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_protocols.h"
#ifdef NDPI_PROTOCOL_SSH
static void ndpi_int_ssh_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SSH);
}
void ndpi_search_ssh_tcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
// struct ndpi_id_struct *src=ndpi_struct->src;
// struct ndpi_id_struct *dst=ndpi_struct->dst;
if (flow->l4.tcp.ssh_stage == 0) {
if (packet->payload_packet_len > 7 && packet->payload_packet_len < 100
&& memcmp(packet->payload, "SSH-", 4) == 0) {
NDPI_LOG(NDPI_PROTOCOL_SSH, ndpi_struct, NDPI_LOG_DEBUG, "ssh stage 0 passed\n");
flow->l4.tcp.ssh_stage = 1 + packet->packet_direction;
return;
}
} else if (flow->l4.tcp.ssh_stage == (2 - packet->packet_direction)) {
if (packet->payload_packet_len > 7 && packet->payload_packet_len < 100
&& memcmp(packet->payload, "SSH-", 4) == 0) {
NDPI_LOG(NDPI_PROTOCOL_SSH, ndpi_struct, NDPI_LOG_DEBUG, "found ssh\n");
ndpi_int_ssh_add_connection(ndpi_struct, flow);
return;
}
}
NDPI_LOG(NDPI_PROTOCOL_SSH, ndpi_struct, NDPI_LOG_DEBUG, "excluding ssh at stage %d\n", flow->l4.tcp.ssh_stage);
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_SSH);
}
#endif
|