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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
* ipp.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_IPP
static void ndpi_int_ipp_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow, ndpi_protocol_type_t protocol_type)
{
ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_IPP, protocol_type);
}
void ndpi_search_ipp(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;
u_int8_t i;
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "search ipp\n");
if (packet->payload_packet_len > 20) {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG,
"searching for a payload with a pattern like 'number(1to8)blanknumber(1to3)ipp://.\n");
/* this pattern means that there is a printer saying that his state is idle,
* means that he is not printing anything at the moment */
i = 0;
if (packet->payload[i] < '0' || packet->payload[i] > '9') {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "payload does not begin with a number.\n");
goto search_for_next_pattern;
}
for (;;) {
i++;
if (!((packet->payload[i] >= '0' && packet->payload[i] <= '9') ||
(packet->payload[i] >= 'a' && packet->payload[i] <= 'f') ||
(packet->payload[i] >= 'A' && packet->payload[i] <= 'F')) || i > 8) {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG,
"read symbols while the symbol is a number.\n");
break;
}
}
if (packet->payload[i++] != ' ') {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "there is no blank following the number.\n");
goto search_for_next_pattern;
}
if (packet->payload[i] < '0' || packet->payload[i] > '9') {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "no number following the blank.\n");
goto search_for_next_pattern;
}
for (;;) {
i++;
if (packet->payload[i] < '0' || packet->payload[i] > '9' || i > 12) {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG,
"read symbols while the symbol is a number.\n");
break;
}
}
if (memcmp(&packet->payload[i], " ipp://", 7) != 0) {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "the string ' ipp://' does not follow.\n");
goto search_for_next_pattern;
}
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "found ipp\n");
ndpi_int_ipp_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
search_for_next_pattern:
if (packet->payload_packet_len > 3 && memcmp(packet->payload, "POST", 4) == 0) {
ndpi_parse_packet_line_info(ndpi_struct, flow);
if (packet->content_line.ptr != NULL && packet->content_line.len > 14
&& memcmp(packet->content_line.ptr, "application/ipp", 15) == 0) {
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "found ipp via POST ... application/ipp.\n");
ndpi_int_ipp_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
NDPI_LOG(NDPI_PROTOCOL_IPP, ndpi_struct, NDPI_LOG_DEBUG, "no ipp detected.\n");
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_IPP);
}
#endif
|