diff options
Diffstat (limited to 'src/lib/protocols/battlefield.c')
| -rw-r--r-- | src/lib/protocols/battlefield.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/lib/protocols/battlefield.c b/src/lib/protocols/battlefield.c new file mode 100644 index 000000000..374dcb61b --- /dev/null +++ b/src/lib/protocols/battlefield.c @@ -0,0 +1,118 @@ +/* + * battlefield.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_protocols.h" +#ifdef NDPI_PROTOCOL_BATTLEFIELD + + +static void ndpi_int_battlefield_add_connection(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; + + ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_BATTLEFIELD, NDPI_REAL_PROTOCOL); + + if (src != NULL) { + src->battlefield_ts = packet->tick_timestamp; + } + if (dst != NULL) { + dst->battlefield_ts = packet->tick_timestamp; + } +} + +void ndpi_search_battlefield(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; + + if (packet->detected_protocol_stack[0] == NDPI_PROTOCOL_BATTLEFIELD) { + if (src != NULL && ((u_int32_t) + (packet->tick_timestamp - src->battlefield_ts) < ndpi_struct->battlefield_timeout)) { + NDPI_LOG(NDPI_PROTOCOL_BATTLEFIELD, ndpi_struct, NDPI_LOG_DEBUG, + "battlefield : save src connection packet detected\n"); + src->battlefield_ts = packet->tick_timestamp; + } else if (dst != NULL && ((u_int32_t) + (packet->tick_timestamp - dst->battlefield_ts) < ndpi_struct->battlefield_timeout)) { + NDPI_LOG(NDPI_PROTOCOL_BATTLEFIELD, ndpi_struct, NDPI_LOG_DEBUG, + "battlefield : save dst connection packet detected\n"); + dst->battlefield_ts = packet->tick_timestamp; + } + return; + } + + if (NDPI_SRC_OR_DST_HAS_PROTOCOL(src, dst, NDPI_PROTOCOL_BATTLEFIELD)) { + if (flow->l4.udp.battlefield_stage == 0 || flow->l4.udp.battlefield_stage == 1 + packet->packet_direction) { + if (packet->payload_packet_len > 8 && get_u_int16_t(packet->payload, 0) == htons(0xfefd)) { + flow->l4.udp.battlefield_msg_id = get_u_int32_t(packet->payload, 2); + flow->l4.udp.battlefield_stage = 1 + packet->packet_direction; + return; + } + } else if (flow->l4.udp.battlefield_stage == 2 - packet->packet_direction) { + if (packet->payload_packet_len > 8 && get_u_int32_t(packet->payload, 0) == flow->l4.udp.battlefield_msg_id) { + NDPI_LOG(NDPI_PROTOCOL_BATTLEFIELD, ndpi_struct, + NDPI_LOG_DEBUG, "Battlefield message and reply detected.\n"); + ndpi_int_battlefield_add_connection(ndpi_struct, flow); + return; + } + } + } + + if (flow->l4.udp.battlefield_stage == 0) { + if (packet->payload_packet_len == 46 && packet->payload[2] == 0 && packet->payload[4] == 0 + && get_u_int32_t(packet->payload, 7) == htonl(0x98001100)) { + flow->l4.udp.battlefield_stage = 3 + packet->packet_direction; + return; + } + } else if (flow->l4.udp.battlefield_stage == 4 - packet->packet_direction) { + if (packet->payload_packet_len == 7 + && (packet->payload[0] == 0x02 || packet->payload[packet->payload_packet_len - 1] == 0xe0)) { + NDPI_LOG(NDPI_PROTOCOL_BATTLEFIELD, ndpi_struct, NDPI_LOG_DEBUG, + "Battlefield message and reply detected.\n"); + ndpi_int_battlefield_add_connection(ndpi_struct, flow); + return; + } + } + + if (packet->payload_packet_len == 18 && memcmp(&packet->payload[5], "battlefield2\x00", 13) == 0) { + NDPI_LOG(NDPI_PROTOCOL_BATTLEFIELD, ndpi_struct, NDPI_LOG_DEBUG, "Battlefield 2 hello packet detected.\n"); + ndpi_int_battlefield_add_connection(ndpi_struct, flow); + return; + } else if (packet->payload_packet_len > 10 && + (memcmp(packet->payload, "\x11\x20\x00\x01\x00\x00\x50\xb9\x10\x11", 10) == 0 + || memcmp(packet->payload, "\x11\x20\x00\x01\x00\x00\x30\xb9\x10\x11", 10) == 0 + || memcmp(packet->payload, "\x11\x20\x00\x01\x00\x00\xa0\x98\x00\x11", 10) == 0)) { + NDPI_LOG(NDPI_PROTOCOL_BATTLEFIELD, ndpi_struct, NDPI_LOG_DEBUG, "Battlefield safe pattern detected.\n"); + ndpi_int_battlefield_add_connection(ndpi_struct, flow); + return; + } + + NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_BATTLEFIELD); + return; +} + +#endif |