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/*
* maplestory.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_MAPLESTORY
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_maplestory_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_MAPLESTORY, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
static void ndpi_search_maplestory(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "search maplestory\n");
if (packet->payload_packet_len == 16
&& (ntohl(get_u_int32_t(packet->payload, 0)) == 0x0e003a00 || ntohl(get_u_int32_t(packet->payload, 0)) == 0x0e003b00
|| ntohl(get_u_int32_t(packet->payload, 0)) == 0x0e004200)
&& ntohs(get_u_int16_t(packet->payload, 4)) == 0x0100 && (packet->payload[6] == 0x32 || packet->payload[6] == 0x33)) {
NDPI_LOG_INFO(ndpi_struct, "found maplestory\n");
ndpi_int_maplestory_add_connection(ndpi_struct, flow);
return;
}
if (packet->payload_packet_len > NDPI_STATICSTRING_LEN("GET /maple")
&& memcmp(packet->payload, "GET /maple", NDPI_STATICSTRING_LEN("GET /maple")) == 0) {
ndpi_parse_packet_line_info(ndpi_struct, flow);
/* Maplestory update */
if (packet->payload_packet_len > NDPI_STATICSTRING_LEN("GET /maple/patch")
&& packet->payload[NDPI_STATICSTRING_LEN("GET /maple")] == '/') {
if (packet->user_agent_line.ptr != NULL && packet->host_line.ptr != NULL
&& packet->user_agent_line.len == NDPI_STATICSTRING_LEN("Patcher")
&& packet->host_line.len > NDPI_STATICSTRING_LEN("patch.")
&& memcmp(&packet->payload[NDPI_STATICSTRING_LEN("GET /maple/")], "patch",
NDPI_STATICSTRING_LEN("patch")) == 0
&& memcmp(packet->user_agent_line.ptr, "Patcher", NDPI_STATICSTRING_LEN("Patcher")) == 0
&& memcmp(packet->host_line.ptr, "patch.", NDPI_STATICSTRING_LEN("patch.")) == 0) {
NDPI_LOG_INFO(ndpi_struct, "found maplestory update\n");
ndpi_int_maplestory_add_connection(ndpi_struct, flow);
return;
}
} else if (packet->user_agent_line.ptr != NULL && packet->user_agent_line.len == NDPI_STATICSTRING_LEN("AspINet")
&& memcmp(&packet->payload[NDPI_STATICSTRING_LEN("GET /maple")], "story/",
NDPI_STATICSTRING_LEN("story/")) == 0
&& memcmp(packet->user_agent_line.ptr, "AspINet", NDPI_STATICSTRING_LEN("AspINet")) == 0) {
NDPI_LOG_INFO(ndpi_struct, "found maplestory update\n");
ndpi_int_maplestory_add_connection(ndpi_struct, flow);
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_maplestory_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("MapleStory", ndpi_struct, *id,
NDPI_PROTOCOL_MAPLESTORY,
ndpi_search_maplestory,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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