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nDPI/src/lib/protocols/imesh.c
Luca Deri 2e5ceac844 Initial import from SVN
2015-04-19 07:25:59 +02:00

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/*
* imesh.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_api.h"
#ifdef NDPI_PROTOCOL_IMESH
static void ndpi_int_imesh_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_IMESH, protocol_type);
}
void ndpi_search_imesh_tcp_udp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
if (packet->udp != NULL) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "UDP FOUND\n");
// this is the login packet
if (packet->payload_packet_len == 28 && (get_u_int32_t(packet->payload, 0)) == htonl(0x02000000) &&
get_u_int32_t(packet->payload, 24) == 0 &&
(packet->udp->dest == htons(1864) || packet->udp->source == htons(1864))) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh Login detected\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
if (packet->payload_packet_len == 36) {
if (get_u_int32_t(packet->payload, 0) == htonl(0x02000000) && packet->payload[4] != 0 &&
packet->payload[5] == 0 && get_u_int16_t(packet->payload, 6) == htons(0x0083) &&
get_u_int32_t(packet->payload, 24) == htonl(0x40000000) &&
(packet->payload[packet->payload_packet_len - 1] == packet->payload[packet->payload_packet_len - 5] ||
packet->payload[packet->payload_packet_len - 1] - 1 == packet->payload[packet->payload_packet_len - 5]
|| packet->payload[packet->payload_packet_len - 1] ==
packet->payload[packet->payload_packet_len - 5] - 1)) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh detected\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
if (get_u_int16_t(packet->payload, 0) == htons(0x0200) && get_u_int16_t(packet->payload, 2) != 0 &&
get_u_int32_t(packet->payload, 4) == htonl(0x02000083) && get_u_int32_t(packet->payload, 24) == htonl(0x40000000) &&
(packet->payload[packet->payload_packet_len - 1] == packet->payload[packet->payload_packet_len - 5] ||
packet->payload[packet->payload_packet_len - 1] - 1 == packet->payload[packet->payload_packet_len - 5]
|| packet->payload[packet->payload_packet_len - 1] ==
packet->payload[packet->payload_packet_len - 5] - 1)) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh detected\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
}
if (packet->payload_packet_len == 24 && get_u_int16_t(packet->payload, 0) == htons(0x0200)
&& get_u_int16_t(packet->payload, 2) != 0 && get_u_int32_t(packet->payload, 4) == htonl(0x03000084) &&
(packet->payload[packet->payload_packet_len - 1] == packet->payload[packet->payload_packet_len - 5] ||
packet->payload[packet->payload_packet_len - 1] - 1 == packet->payload[packet->payload_packet_len - 5] ||
packet->payload[packet->payload_packet_len - 1] == packet->payload[packet->payload_packet_len - 5] - 1)) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh detected\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
if (packet->payload_packet_len == 32 && get_u_int32_t(packet->payload, 0) == htonl(0x02000000) &&
get_u_int16_t(packet->payload, 21) == 0 && get_u_int16_t(packet->payload, 26) == htons(0x0100)) {
if (get_u_int32_t(packet->payload, 4) == htonl(0x00000081) && packet->payload[11] == packet->payload[15] &&
get_l16(packet->payload, 24) == htons(packet->udp->source)) {
/* packet->payload[28] = source address */
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh detected\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
if (get_u_int32_t(packet->payload, 4) == htonl(0x01000082)) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh detected\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
}
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh UDP packetlen: %d\n",
packet->payload_packet_len);
}
if (packet->tcp != NULL) {
if (packet->payload_packet_len == 64 && get_u_int32_t(packet->payload, 0) == htonl(0x40000000) &&
get_u_int32_t(packet->payload, 4) == 0 && get_u_int32_t(packet->payload, 8) == htonl(0x0000fcff) &&
get_u_int32_t(packet->payload, 12) == htonl(0x04800100) && get_u_int32_t(packet->payload, 45) == htonl(0xff020000) &&
get_u_int16_t(packet->payload, 49) == htons(0x001a)) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "found imesh.\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
if (packet->payload_packet_len == 95 && get_u_int32_t(packet->payload, 0) == htonl(0x5f000000) &&
get_u_int16_t(packet->payload, 4) == 0 && get_u_int16_t(packet->payload, 7) == htons(0x0004) &&
get_u_int32_t(packet->payload, 20) == 0 && get_u_int32_t(packet->payload, 28) == htonl(0xc8000400) &&
packet->payload[9] == 0x80 && get_u_int32_t(packet->payload, 10) == get_u_int32_t(packet->payload, 24)) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "found imesh.\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
if (packet->payload_packet_len == 28 && get_u_int32_t(packet->payload, 0) == htonl(0x1c000000) &&
get_u_int16_t(packet->payload, 10) == htons(0xfcff) && get_u_int32_t(packet->payload, 12) == htonl(0x07801800) &&
(get_u_int16_t(packet->payload, packet->payload_packet_len - 2) == htons(0x1900) ||
get_u_int16_t(packet->payload, packet->payload_packet_len - 2) == htons(0x1a00))) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "found imesh.\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "TCP FOUND :: Payload %u\n",
packet->payload_packet_len);
if (packet->actual_payload_len == 0) {
return;
}
if ((packet->actual_payload_len == 8 || packet->payload_packet_len == 10) /* PATTERN:: 04 00 00 00 00 00 00 00 [00 00] */
&&get_u_int32_t(packet->payload, 0) == htonl(0x04000000)
&& get_u_int32_t(packet->payload, 4) == 0) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 10 /* PATTERN:: ?? ?? 04|00 00 64|00 00 */
&& (packet->payload[2] == 0x04 || packet->payload[2] == 0x00)
&& packet->payload[3] == 0x00 && (packet->payload[4] == 0x00 || packet->payload[4] == 0x64)
&& packet->payload[5] == 0x00
&& (packet->payload[2] != packet->payload[4]) /* We do not want that the packet is ?? ?? 00 00 00 00 */
) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 2 && packet->payload[0] == 0x06 && packet->payload[1] == 0x00) {
flow->l4.tcp.imesh_stage++;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 10 /* PATTERN:: 06 00 04|00 00 01|00 00 01|00 00 ?? 00 */
&& packet->payload[0] == 0x06
&& packet->payload[1] == 0x00 && (packet->payload[2] == 0x04 || packet->payload[2] == 0x00)
&& packet->payload[3] == 0x00 && (packet->payload[4] == 0x00 || packet->payload[4] == 0x01)
&& packet->payload[5] == 0x00 && (packet->payload[6] == 0x01 || packet->payload[6] == 0x00)
&& packet->payload[7] == 0x00 && packet->payload[9] == 0x00
&& (packet->payload[2] || packet->payload[4] || packet->payload[6]) /* We do not want that the packet is all 06 00 00 ... */
) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 24 && packet->payload[0] == 0x06 // PATTERN :: 06 00 12 00 00 00 34 00 00
&& packet->payload[1] == 0x00
&& packet->payload[2] == 0x12
&& packet->payload[3] == 0x00
&& packet->payload[4] == 0x00
&& packet->payload[5] == 0x00
&& packet->payload[6] == 0x34 && packet->payload[7] == 0x00 && packet->payload[8] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 8 /* PATTERN:: 06|00 00 02 00 00 00 33 00 */
&& (packet->payload[0] == 0x06 || packet->payload[0] == 0x00)
&& packet->payload[1] == 0x00
&& packet->payload[2] == 0x02
&& packet->payload[3] == 0x00
&& packet->payload[4] == 0x00
&& packet->payload[5] == 0x00 && packet->payload[6] == 0x33 && packet->payload[7] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->payload_packet_len == 6 /* PATTERN:: 02 00 00 00 33 00 */
&& packet->payload[0] == 0x02
&& packet->payload[1] == 0x00
&& packet->payload[2] == 0x00
&& packet->payload[3] == 0x00 && packet->payload[4] == 0x33 && packet->payload[5] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 12 && packet->payload[0] == 0x06 // PATTERN : 06 00 06 00 00 00 64 00
&& packet->payload[1] == 0x00
&& packet->payload[2] == 0x06
&& packet->payload[3] == 0x00
&& packet->payload[4] == 0x00
&& packet->payload[5] == 0x00 && packet->payload[6] == 0x64 && packet->payload[7] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 10 /* PATTERN:: 06 00 04|01 00 00 00 01|00 00 ?? 00 */
&& packet->payload[0] == 0x06
&& packet->payload[1] == 0x00 && (packet->payload[2] == 0x04 || packet->payload[2] == 0x01)
&& packet->payload[3] == 0x00
&& packet->payload[4] == 0x00
&& packet->payload[5] == 0x00 && (packet->payload[6] == 0x01 || packet->payload[6] == 0x00)
&& packet->payload[7] == 0x00
/* && packet->payload[8]==0x00 */
&& packet->payload[9] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if ((packet->actual_payload_len == 64 || packet->actual_payload_len == 52 /* PATTERN:: [len] 00 00 00 00 */
|| packet->actual_payload_len == 95)
&& get_u_int16_t(packet->payload, 0) == (packet->actual_payload_len)
&& packet->payload[1] == 0x00 && packet->payload[2] == 0x00
&& packet->payload[3] == 0x00 && packet->payload[4] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 6 && packet->payload[0] == 0x06 // PATTERN : 06 00 04|6c 00|01 00 00
&& packet->payload[1] == 0x00 && (packet->payload[2] == 0x04 || packet->payload[2] == 0x6c)
&& (packet->payload[3] == 0x00 || packet->payload[3] == 0x01)
&& packet->payload[4] == 0x00 && packet->payload[5] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 6 /* PATTERN:: [len] ?? ee 00 00 00 */
&& get_u_int16_t(packet->payload, 0) == (packet->actual_payload_len)
&& packet->payload[2] == 0xee
&& packet->payload[3] == 0x00 && packet->payload[4] == 0x00 && packet->payload[5] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
} else if (packet->actual_payload_len == 10 /* PATTERN:: 06 00 00 00 00 00 00 00 */
&& packet->payload[0] == 0x06
&& packet->payload[1] == 0x00
&& packet->payload[2] == 0x00
&& packet->payload[3] == 0x00
&& packet->payload[4] == 0x00
&& packet->payload[5] == 0x00 && packet->payload[6] == 0x00 && packet->payload[7] == 0x00) {
flow->l4.tcp.imesh_stage += 2;
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG,
"IMESH FOUND :: Payload %u\n", packet->actual_payload_len);
}
/* http login */
if (packet->payload_packet_len > NDPI_STATICSTRING_LEN("POST /registration") &&
memcmp(packet->payload, "POST /registration", NDPI_STATICSTRING_LEN("POST /registration")) == 0) {
ndpi_parse_packet_line_info(ndpi_struct, flow);
if (packet->parsed_lines > 6 &&
packet->host_line.ptr != NULL &&
packet->host_line.len == NDPI_STATICSTRING_LEN("login.bearshare.com") &&
packet->line[1].ptr != NULL &&
packet->line[1].len == NDPI_STATICSTRING_LEN("Authorization: Basic Og==") &&
packet->line[4].ptr != NULL &&
packet->line[4].len == NDPI_STATICSTRING_LEN("Accept-Encoding: identity") &&
memcmp(packet->line[1].ptr, "Authorization: Basic Og==",
NDPI_STATICSTRING_LEN("Authorization: Basic Og==")) == 0 &&
memcmp(packet->host_line.ptr, "login.bearshare.com",
NDPI_STATICSTRING_LEN("login.bearshare.com")) == 0 &&
memcmp(packet->line[4].ptr, "Accept-Encoding: identity",
NDPI_STATICSTRING_LEN("Accept-Encoding: identity")) == 0) {
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh Login detected\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
/*give one packet tolerance for detection */
if((flow->l4.tcp.imesh_stage >= 4)
&& (flow->l4.tcp.seen_syn && flow->l4.tcp.seen_syn_ack && flow->l4.tcp.seen_ack) /* We have seen the 3-way handshake */)
{
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "found imesh.\n");
ndpi_int_imesh_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
}
if ((flow->packet_counter < 5) || packet->actual_payload_len == 0) {
return;
}
//imesh_not_found_end:
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_IMESH);
NDPI_LOG(NDPI_PROTOCOL_IMESH, ndpi_struct, NDPI_LOG_DEBUG, "iMesh excluded at stage %d\n",
packet->tcp != NULL ? flow->l4.tcp.imesh_stage : 0);
}
#endif
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