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/*
* ipp.c
*
* Copyright (C) 2009-11 - ipoque GmbH
* Copyright (C) 2011-22 - 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_IPP
#include "ndpi_api.h"
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_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_IPP, NDPI_PROTOCOL_UNKNOWN);
}
void ndpi_search_ipp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
u_int8_t i;
NDPI_LOG_DBG(ndpi_struct, "search ipp\n");
if (packet->payload_packet_len > 20) {
NDPI_LOG_DBG2(ndpi_struct,
"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_DBG2(ndpi_struct, "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_DBG2(ndpi_struct,
"read symbols while the symbol is a number.\n");
break;
}
}
if (packet->payload[i++] != ' ') {
NDPI_LOG_DBG2(ndpi_struct, "there is no blank following the number\n");
goto search_for_next_pattern;
}
if (packet->payload[i] < '0' || packet->payload[i] > '9') {
NDPI_LOG_DBG2(ndpi_struct, "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_DBG2(ndpi_struct,
"read symbols while the symbol is a number.\n");
break;
}
}
if (memcmp(&packet->payload[i], " ipp://", 7) != 0) {
NDPI_LOG_DBG2(ndpi_struct, "the string ' ipp://' does not follow\n");
goto search_for_next_pattern;
}
NDPI_LOG_INFO(ndpi_struct, "found ipp\n");
ndpi_int_ipp_add_connection(ndpi_struct, flow);
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_INFO(ndpi_struct, "found ipp via POST ... application/ipp\n");
ndpi_int_ipp_add_connection(ndpi_struct, flow);
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_ipp_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("IPP", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_IPP,
ndpi_search_ipp,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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