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

563 lines
22 KiB
C
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/*
* msn.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_MSN
#define MAX_PACKETS_FOR_MSN 100
static void ndpi_int_msn_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_MSN, protocol_type);
}
static u_int8_t ndpi_int_find_xmsn(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
if (packet->parsed_lines > 3) {
u_int16_t i;
for (i = 2; i < packet->parsed_lines; i++) {
if (packet->line[i].ptr != NULL && packet->line[i].len > NDPI_STATICSTRING_LEN("X-MSN") &&
memcmp(packet->line[i].ptr, "X-MSN", NDPI_STATICSTRING_LEN("X-MSN")) == 0) {
return 1;
}
}
}
return 0;
}
static void ndpi_search_msn_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 = flow->src;
struct ndpi_id_struct *dst = flow->dst;
u_int16_t plen;
u_int16_t status = 0;
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN tcp detection...\n");
#ifdef NDPI_PROTOCOL_SSL
if (packet->detected_protocol_stack[0] == NDPI_PROTOCOL_SSL) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "msn ssl ft test\n");
if (flow->packet_counter < 10) {
}
if (flow->packet_counter == 7 && packet->payload_packet_len > 300) {
if (memcmp(packet->payload + 24, "MSNSLP", 6) == 0
|| (get_u_int32_t(packet->payload, 0) == htonl(0x30000000) && get_u_int32_t(packet->payload, 4) == 0x00000000)) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "detected MSN File Transfer, ifdef ssl.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
}
if (flow->packet_counter >= 5 && flow->packet_counter <= 10 && (get_u_int32_t(packet->payload, 0) == htonl(0x18000000)
&& get_u_int32_t(packet->payload, 4) == 0x00000000)) {
flow->l4.tcp.msn_ssl_ft++;
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"increased msn ft ssl stage to: %u at packet nr: %u\n", flow->l4.tcp.msn_ssl_ft,
flow->packet_counter);
if (flow->l4.tcp.msn_ssl_ft == 2) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"detected MSN File Transfer, ifdef ssl 2.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
}
return;
}
}
#endif
/* we detect the initial connection only ! */
/* match: "VER " ..... "CVR" x 0x0d 0x0a
* len should be small, lets say less than 100 bytes
* x is now "0", but can be increased
*/
/* now we have a look at the first packet only. */
if (flow->packet_counter == 1
#ifdef NDPI_PROTOCOL_SSL
|| ((packet->detected_protocol_stack[0] == NDPI_PROTOCOL_SSL) && flow->packet_counter <= 3)
#endif
) {
/* this part is working asymmetrically */
if (packet->payload_packet_len > 32 && (packet->payload[0] == 0x02 || packet->payload[0] == 0x00)
&& (ntohl(get_u_int32_t(packet->payload, 8)) == 0x2112a442 || ntohl(get_u_int32_t(packet->payload, 4)) == 0x2112a442)
&& ((ntohl(get_u_int32_t(packet->payload, 24)) == 0x000f0004 && ntohl(get_u_int32_t(packet->payload, 28)) == 0x72c64bc6)
|| (ntohl(get_u_int32_t(packet->payload, 20)) == 0x000f0004
&& ntohl(get_u_int32_t(packet->payload, 24)) == 0x72c64bc6))) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN in packets that also contain voice.messenger.live.com.\n");
/* TODO this is an alternative pattern for video detection */
/* if (packet->payload_packet_len > 100 &&
get_u_int16_t(packet->payload, 86) == htons(0x05dc)) { */
if (packet->payload_packet_len > 101 && packet->payload[101] == 0x02) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
} else {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
}
return;
}
/* this case works asymmetrically */
if (packet->payload_packet_len > 10 && packet->payload_packet_len < 100) {
if (get_u_int8_t(packet->payload, packet->payload_packet_len - 2) == 0x0d
&& get_u_int8_t(packet->payload, packet->payload_packet_len - 1) == 0x0a) {
/* The MSNP string is used in XBOX clients. */
if (memcmp(packet->payload, "VER ", 4) == 0) {
if (memcmp(&packet->payload[packet->payload_packet_len - 6], "CVR",
3) == 0 || memcmp(&packet->payload[packet->payload_packet_len - 8], "MSNP", 4) == 0) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN by pattern VER...CVR/MSNP ODOA.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
if (memcmp(&packet->payload[4], "MSNFT", 5) == 0) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN FT by pattern VER MSNFT...0d0a.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
}
}
}
if (
#ifdef NDPI_PROTOCOL_HTTP
packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP ||
#endif
memcmp(packet->payload, "GET ", NDPI_STATICSTRING_LEN("GET ")) == 0 ||
memcmp(packet->payload, "POST ", NDPI_STATICSTRING_LEN("POST ")) == 0) {
ndpi_parse_packet_line_info(ndpi_struct, flow);
if (packet->user_agent_line.ptr != NULL &&
packet->user_agent_line.len > NDPI_STATICSTRING_LEN("Messenger/") &&
memcmp(packet->user_agent_line.ptr, "Messenger/", NDPI_STATICSTRING_LEN("Messenger/")) == 0) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
#ifdef NDPI_PROTOCOL_HTTP
/* we have to examine two http packets */
if (packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP) {
}
#endif
/* not seen this pattern in any trace */
/* now test for http login, at least 100 a bytes packet */
if (packet->payload_packet_len > 100) {
if (
#ifdef NDPI_PROTOCOL_HTTP
packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP ||
#endif
memcmp(packet->payload, "POST http://", 12) == 0) {
/* scan packet if not already done... */
ndpi_parse_packet_line_info(ndpi_struct, flow);
if (packet->content_line.ptr != NULL &&
((packet->content_line.len == NDPI_STATICSTRING_LEN("application/x-msn-messenger") &&
memcmp(packet->content_line.ptr, "application/x-msn-messenger",
NDPI_STATICSTRING_LEN("application/x-msn-messenger")) == 0) ||
(packet->content_line.len >= NDPI_STATICSTRING_LEN("text/x-msnmsgr") &&
memcmp(packet->content_line.ptr, "text/x-msnmsgr",
NDPI_STATICSTRING_LEN("text/x-msnmsgr")) == 0))) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN by pattern POST http:// .... application/x-msn-messenger.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
}
/* now test for http login that uses a gateway, at least 400 a bytes packet */
/* for this case the asymmetric detection is asym (1) */
if (packet->payload_packet_len > 400) {
if ((
#ifdef NDPI_PROTOCOL_HTTP
packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP ||
#endif
(memcmp(packet->payload, "POST ", 5) == 0))) {
u_int16_t c;
if (memcmp(&packet->payload[5], "http://", 7) == 0) {
/*
* We are searching for a paten "POST http://gateway.messenger.hotmail.com/gateway/gateway.dll" or
* "POST http://<some ip addres here like 172.0.0.0>/gateway/gateway.dll"
* POST http:// is 12 byte so we are searching for 13 to 70 byte for this paten.
*/
for (c = 13; c < 50; c++) {
if (memcmp(&packet->payload[c], "/", 1) == 0) {
if (memcmp(&packet->payload[c], "/gateway/gateway.dll", 20) == 0) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found pattern http://.../gateway/gateway.ddl.\n");
status = 1;
break;
}
}
}
} else if ((memcmp(&packet->payload[5], "/gateway/gateway.dll", 20) == 0)) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found pattern http://.../gateway/gateway.ddl.\n");
status = 1;
}
}
if (status) {
u_int16_t a;
ndpi_parse_packet_line_info(ndpi_struct, flow);
if (packet->content_line.ptr != NULL
&&
((packet->content_line.len == 23
&& memcmp(packet->content_line.ptr, "text/xml; charset=utf-8", 23) == 0)
||
(packet->content_line.len == 24
&& memcmp(packet->content_line.ptr, "text/html; charset=utf-8", 24) == 0)
||
(packet->content_line.len == 33
&& memcmp(packet->content_line.ptr, "application/x-www-form-urlencoded", 33) == 0)
)) {
if ((src != NULL
&& NDPI_COMPARE_PROTOCOL_TO_BITMASK(src->detected_protocol_bitmask, NDPI_PROTOCOL_MSN)
!= 0) || (dst != NULL
&& NDPI_COMPARE_PROTOCOL_TO_BITMASK(dst->detected_protocol_bitmask,
NDPI_PROTOCOL_MSN)
!= 0)) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN with pattern text/xml; charset=utf-8.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
for (a = 0; a < packet->parsed_lines; a++) {
if (packet->line[a].len >= 4 &&
(memcmp(packet->line[a].ptr, "CVR ", 4) == 0
|| memcmp(packet->line[a].ptr, "VER ",
4) == 0 || memcmp(packet->line[a].ptr, "ANS ", 4) == 0)) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN with pattern text/sml; charset0utf-8.\n");
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct,
NDPI_LOG_TRACE, "MSN xml CVS / VER / ANS found\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
}
}
}
/* asym (1) ; possibly occurs in symmetric cases also. */
if (flow->packet_counter <= 10 &&
(flow->packet_direction_counter[0] <= 2 || flow->packet_direction_counter[1] <= 2)
&& packet->payload_packet_len > 100) {
/* not necessary to check the length, because this has been done : >400. */
if (
#ifdef NDPI_PROTOCOL_HTTP
packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP ||
#endif
(memcmp(packet->payload, "HTTP/1.0 200 OK", 15) == 0) ||
(memcmp(packet->payload, "HTTP/1.1 200 OK", 15) == 0)
) {
ndpi_parse_packet_line_info(ndpi_struct, flow);
if (packet->content_line.ptr != NULL &&
((packet->content_line.len == NDPI_STATICSTRING_LEN("application/x-msn-messenger") &&
memcmp(packet->content_line.ptr, "application/x-msn-messenger",
NDPI_STATICSTRING_LEN("application/x-msn-messenger")) == 0) ||
(packet->content_line.len >= NDPI_STATICSTRING_LEN("text/x-msnmsgr") &&
memcmp(packet->content_line.ptr, "text/x-msnmsgr",
NDPI_STATICSTRING_LEN("text/x-msnmsgr")) == 0))) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"HTTP/1.0 200 OK .... application/x-msn-messenger.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
if (ndpi_int_find_xmsn(ndpi_struct, flow) == 1) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "HTTP/1.0 200 OK .... X-MSN.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
}
/* did not find any trace with this pattern !!!!! */
/* now block proxy connection */
if (packet->payload_packet_len >= 42) {
if (memcmp(packet->payload, "CONNECT messenger.hotmail.com:1863 HTTP/1.", 42) == 0) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN with pattern CONNECT messenger.hotmail.com:1863 HTTP/1..\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
if (packet->payload_packet_len >= 18) {
if (memcmp(packet->payload, "USR ", 4) == 0 || memcmp(packet->payload, "ANS ", 4) == 0) {
/* now we must see a number */
const u_int16_t endlen = packet->payload_packet_len - 12;
plen = 4;
while (1) {
if (packet->payload[plen] == ' ') {
break;
}
if (packet->payload[plen] < '0' || packet->payload[plen] > '9') {
goto ndpi_msn_exclude;
}
plen++;
if (plen >= endlen) {
goto ndpi_msn_exclude;
}
}
while (plen < endlen) {
if (ndpi_check_for_email_address(ndpi_struct, flow, plen) != 0) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "found mail address\n");
break;
}
if (packet->payload_packet_len > plen + 1
&& (packet->payload[plen] < 20 || packet->payload[plen] > 128)) {
goto ndpi_msn_exclude;
}
plen++;
if (plen >= endlen) {
goto ndpi_msn_exclude;
}
}
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"found MSN with pattern USR/ANS ...mail_address.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
}
}
/* finished examining the first packet only. */
/* asym (1) ; possibly occurs in symmetric cases also. */
if (flow->packet_counter <= 10 &&
(flow->packet_direction_counter[0] <= 2 || flow->packet_direction_counter[1] <= 2) &&
packet->payload_packet_len > 100) {
/* not necessary to check the length, because this has been done : >400. */
if (
#ifdef NDPI_PROTOCOL_HTTP
packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP ||
#endif
(memcmp(packet->payload, "HTTP/1.0 200 OK", 15) == 0) ||
(memcmp(packet->payload, "HTTP/1.1 200 OK", 15) == 0)
) {
ndpi_parse_packet_line_info(ndpi_struct, flow);
if (packet->content_line.ptr != NULL &&
((packet->content_line.len == NDPI_STATICSTRING_LEN("application/x-msn-messenger") &&
memcmp(packet->content_line.ptr, "application/x-msn-messenger",
NDPI_STATICSTRING_LEN("application/x-msn-messenger")) == 0) ||
(packet->content_line.len >= NDPI_STATICSTRING_LEN("text/x-msnmsgr") &&
memcmp(packet->content_line.ptr, "text/x-msnmsgr", NDPI_STATICSTRING_LEN("text/x-msnmsgr")) == 0))) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE,
"HTTP/1.0 200 OK .... application/x-msn-messenger.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
if (ndpi_int_find_xmsn(ndpi_struct, flow) == 1) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "HTTP/1.0 200 OK .... X-MSN.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL);
return;
}
}
}
/* finished examining the secone packet only */
/* direct user connection (file transfer,...) */
if ((src != NULL && NDPI_COMPARE_PROTOCOL_TO_BITMASK(src->detected_protocol_bitmask, NDPI_PROTOCOL_MSN) != 0)
|| (dst != NULL
&& NDPI_COMPARE_PROTOCOL_TO_BITMASK(dst->detected_protocol_bitmask, NDPI_PROTOCOL_MSN) != 0)) {
if (flow->packet_counter == 1 &&
packet->payload_packet_len > 12 && memcmp(packet->payload, "recipientid=", 12) == 0) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_DEBUG, "detected file transfer.\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
return;
}
}
/* MSN File Transfer of MSN 8.1 and 8.5
* first packet with length 4 and pattern 0x04000000
* second packet (in the same direction), with length 56 and pattern 0x00000000 from payload[16]
* third packet (in the opposite direction to 1 & 2), with length 4 and pattern 0x30000000
*/
if (flow->l4.tcp.msn_stage == 0) {
/* asymmetric detection to this pattern is asym (2) */
if ((packet->payload_packet_len == 4 || packet->payload_packet_len == 8)
&& get_u_int32_t(packet->payload, 0) == htonl(0x04000000)) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_DEBUG, "maybe first TCP MSN detected\n");
if (packet->payload_packet_len == 8 && get_u_int32_t(packet->payload, 4) == htonl(0x666f6f00)) {
flow->l4.tcp.msn_stage = 5 + packet->packet_direction;
return;
}
flow->l4.tcp.msn_stage = 1 + packet->packet_direction;
return;
}
/* asymmetric detection to this pattern is asym (2) */
} else if (flow->l4.tcp.msn_stage == 1 + packet->packet_direction) {
if (packet->payload_packet_len > 10 && get_u_int32_t(packet->payload, 0) == htonl(0x666f6f00)) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN File Transfer detected 1\n");
return;
}
/* did not see this pattern in any trace */
if (packet->payload_packet_len == 56 && get_u_int32_t(packet->payload, 16) == 0) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_DEBUG, "maybe Second TCP MSN detected\n");
flow->l4.tcp.msn_stage = 3 + packet->packet_direction;
return;
}
} else if (flow->l4.tcp.msn_stage == 2 - packet->packet_direction
&& packet->payload_packet_len == 4 && get_u_int32_t(packet->payload, 0) == htonl(0x30000000)) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN File Transfer detected 2\n");
return;
} else if ((flow->l4.tcp.msn_stage == 3 + packet->packet_direction)
|| (flow->l4.tcp.msn_stage == 4 - packet->packet_direction)) {
if (packet->payload_packet_len == 4 && get_u_int32_t(packet->payload, 0) == htonl(0x30000000)) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN File Transfer detected 2\n");
return;
}
} else if (flow->l4.tcp.msn_stage == 6 - packet->packet_direction) {
if ((packet->payload_packet_len == 4) &&
(get_u_int32_t(packet->payload, 0) == htonl(0x10000000) || get_u_int32_t(packet->payload, 0) == htonl(0x30000000))) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN File Transfer detected 3\n");
return;
}
} else if (flow->l4.tcp.msn_stage == 5 + packet->packet_direction) {
if ((packet->payload_packet_len == 20) && get_u_int32_t(packet->payload, 0) == htonl(0x10000000)) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN File Transfer detected 3\n");
return;
}
}
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_DEBUG, "msn 7.\n");
if (flow->packet_counter <= MAX_PACKETS_FOR_MSN) {
if (packet->tcp->source == htons(443)
|| packet->tcp->dest == htons(443)) {
if (packet->payload_packet_len > 300) {
if (memcmp(&packet->payload[40], "INVITE MSNMSGR", 14) == 0
|| memcmp(&packet->payload[56], "INVITE MSNMSGR", 14) == 0
|| memcmp(&packet->payload[172], "INVITE MSNMSGR", 14) == 0) {
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN File Transfer detected 3\n");
return;
}
}
return;
}
/* For no
n port 443 flows exclude flow bitmask after first packet itself */
}
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "MSN tcp excluded.\n");
ndpi_msn_exclude:
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_MSN);
}
static void ndpi_search_udp_msn_misc(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
struct ndpi_id_struct *src = flow->src;
struct ndpi_id_struct *dst = flow->dst;
/* do we have an msn login ? */
if ((src == NULL || NDPI_COMPARE_PROTOCOL_TO_BITMASK(src->detected_protocol_bitmask, NDPI_PROTOCOL_MSN) == 0)
&& (dst == NULL
|| NDPI_COMPARE_PROTOCOL_TO_BITMASK(dst->detected_protocol_bitmask, NDPI_PROTOCOL_MSN) == 0)) {
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_MSN);
return;
}
/* asymmetric ft detection works */
if (packet->payload_packet_len == 20
&& get_u_int32_t(packet->payload, 4) == 0 && packet->payload[9] == 0
&& get_u_int16_t(packet->payload, 10) == htons(0x0100)) {
NDPI_LOG(NDPI_PROTOCOL_MSN, ndpi_struct, NDPI_LOG_TRACE, "msn udp misc data connection detected\n");
ndpi_int_msn_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL);
}
/* asymmetric detection working. */
return;
//}
}
void ndpi_search_msn(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
/* this if request should always be true */
if (NDPI_COMPARE_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_MSN) == 0) {
/* we deal with tcp now */
if (packet->tcp != NULL) {
/* msn can use http or ssl for connection. That's why every http, ssl and ukn packet must enter in the msn detection */
/* the detection can swich out the http or the ssl detection. In this case we need not check those protocols */
// need to do the ceck when protocol == http too (POST /gateway ...)
if (packet->detected_protocol_stack[0] == NDPI_PROTOCOL_UNKNOWN
#if defined(NDPI_PROTOCOL_HTTP)
|| packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP
#endif
#if defined(NDPI_PROTOCOL_SSL)
|| packet->detected_protocol_stack[0] == NDPI_PROTOCOL_SSL
#endif
#if defined(NDPI_PROTOCOL_STUN)
|| packet->detected_protocol_stack[0] == NDPI_PROTOCOL_STUN
#endif
) {
ndpi_search_msn_tcp(ndpi_struct, flow);
}
} else if (packet->udp != NULL) {
ndpi_search_udp_msn_misc(ndpi_struct, flow);
}
}
}
#endif
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