diff options
Diffstat (limited to 'src/lib/protocols/dofus.c')
| -rw-r--r-- | src/lib/protocols/dofus.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/lib/protocols/dofus.c b/src/lib/protocols/dofus.c new file mode 100644 index 000000000..43d9c9f73 --- /dev/null +++ b/src/lib/protocols/dofus.c @@ -0,0 +1,149 @@ +/* + * dofus.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_DOFUS + +static void ndpi_dofus_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) +{ + ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_DOFUS, NDPI_REAL_PROTOCOL); +} + +void ndpi_search_dofus(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; + + + /* Dofus v 1.x.x */ + if (packet->payload_packet_len == 13 && get_u_int16_t(packet->payload, 1) == ntohs(0x0508) + && get_u_int16_t(packet->payload, 5) == ntohs(0x04a0) + && get_u_int16_t(packet->payload, packet->payload_packet_len - 2) == ntohs(0x0194)) { + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "found dofus.\n"); + ndpi_dofus_add_connection(ndpi_struct, flow); + return; + } + if (flow->l4.tcp.dofus_stage == 0 && packet->payload_packet_len == 3 && memcmp(packet->payload, "HG", 2) == 0 + && packet->payload[packet->payload_packet_len - 1] == 0) { + flow->l4.tcp.dofus_stage = 1; + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "maybe dofus.\n"); + return; + } + if (flow->l4.tcp.dofus_stage == 0 && packet->payload_packet_len == 35 && memcmp(packet->payload, "HC", 2) == 0 + && packet->payload[packet->payload_packet_len - 1] == 0) { + flow->l4.tcp.dofus_stage = 1; + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "maybe dofus.\n"); + return; + } + if (flow->l4.tcp.dofus_stage == 0 && packet->payload_packet_len > 2 && packet->payload[0] == 'A' + && (packet->payload[1] == 'x' || packet->payload[1] == 'X') + && packet->payload[packet->payload_packet_len - 1] == 0) { + flow->l4.tcp.dofus_stage = 1; + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "maybe dofus.\n"); + return; + } + if (flow->l4.tcp.dofus_stage == 0 && packet->payload_packet_len == 12 && memcmp(packet->payload, "Af", 2) == 0 + && packet->payload[packet->payload_packet_len - 1] == 0) { + flow->l4.tcp.dofus_stage = 1; + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "maybe dofus.\n"); + return; + } + if (flow->l4.tcp.dofus_stage == 0 && packet->payload_packet_len > 2 && memcmp(packet->payload, "Ad", 2) + && packet->payload[packet->payload_packet_len - 1] == 0) { + flow->l4.tcp.dofus_stage = 1; + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "maybe dofus.\n"); + return; + } + if (packet->payload_packet_len == 11 && memcmp(packet->payload, "AT", 2) == 0 && packet->payload[10] == 0x00) { + if (flow->l4.tcp.dofus_stage == 1) { + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "found dofus.\n"); + ndpi_dofus_add_connection(ndpi_struct, flow); + return; + } + } + if (flow->l4.tcp.dofus_stage == 1 && packet->payload_packet_len == 5 + && packet->payload[0] == 'A' && packet->payload[4] == 0x00 && (packet->payload[1] == 'T' + || packet->payload[1] == 'k')) { + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "found dofus asym.\n"); + ndpi_dofus_add_connection(ndpi_struct, flow); + return; + } + /* end Dofus 1.x.x */ + + + /* Dofus 2.0 */ + if ((packet->payload_packet_len == 11 || packet->payload_packet_len == 13 || packet->payload_packet_len == 49) + && get_u_int32_t(packet->payload, 0) == ntohl(0x00050800) + && get_u_int16_t(packet->payload, 4) == ntohs(0x0005) + && get_u_int16_t(packet->payload, 8) == ntohs(0x0005) + && packet->payload[10] == 0x18) { + if (packet->payload_packet_len == 13 + && get_u_int16_t(packet->payload, packet->payload_packet_len - 2) != ntohs(0x0194)) { + goto exclude; + } + if (packet->payload_packet_len == 49 && ntohs(get_u_int16_t(packet->payload, 15)) + 17 != packet->payload_packet_len) { + goto exclude; + } + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "found dofus.\n"); + ndpi_dofus_add_connection(ndpi_struct, flow); + return; + } + if (packet->payload_packet_len >= 41 && get_u_int16_t(packet->payload, 0) == ntohs(0x01b9) && packet->payload[2] == 0x26) { + u_int16_t len, len2; + len = ntohs(get_u_int16_t(packet->payload, 3)); + if ((len + 5 + 2) > packet->payload_packet_len) + goto exclude; + len2 = ntohs(get_u_int16_t(packet->payload, 5 + len)); + if (5 + len + 2 + len2 == packet->payload_packet_len) { + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "found dofus.\n"); + ndpi_dofus_add_connection(ndpi_struct, flow); + return; + } + } + if (packet->payload_packet_len == 56 + && memcmp(packet->payload, "\x00\x11\x35\x02\x03\x00\x93\x96\x01\x00", 10) == 0) { + u_int16_t len, len2; + len = ntohs(get_u_int16_t(packet->payload, 10)); + if ((len + 12 + 2) > packet->payload_packet_len) + goto exclude; + len2 = ntohs(get_u_int16_t(packet->payload, 12 + len)); + if ((12 + len + 2 + len2 + 1) > packet->payload_packet_len) + goto exclude; + if (12 + len + 2 + len2 + 1 == packet->payload_packet_len && packet->payload[12 + len + 2 + len2] == 0x01) { + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "found dofus.\n"); + ndpi_dofus_add_connection(ndpi_struct, flow); + return; + } + } + exclude: + NDPI_LOG(NDPI_PROTOCOL_DOFUS, ndpi_struct, NDPI_LOG_DEBUG, "exclude dofus.\n"); + NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_DOFUS); +} + +#endif |