diff options
Diffstat (limited to 'src/lib/protocols/winmx.c')
| -rw-r--r-- | src/lib/protocols/winmx.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/lib/protocols/winmx.c b/src/lib/protocols/winmx.c new file mode 100644 index 000000000..d032150b7 --- /dev/null +++ b/src/lib/protocols/winmx.c @@ -0,0 +1,104 @@ +/* + * winmx.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_WINMX + + +static void ndpi_int_winmx_add_connection(struct ndpi_detection_module_struct + *ndpi_struct, struct ndpi_flow_struct *flow); + +static void ndpi_int_winmx_add_connection(struct ndpi_detection_module_struct + *ndpi_struct, struct ndpi_flow_struct *flow) +{ + ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_WINMX, NDPI_REAL_PROTOCOL); +} + + +void ndpi_search_winmx_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=ndpi_struct->src; +// struct ndpi_id_struct *dst=ndpi_struct->dst; + + + if (flow->l4.tcp.winmx_stage == 0) { + if (packet->payload_packet_len == 1 || (packet->payload_packet_len > 1 && packet->payload[0] == 0x31)) { + return; + } + /* did not see this pattern in any trace that we have */ + if (((packet->payload_packet_len) == 4) + && (memcmp(packet->payload, "SEND", 4) == 0)) { + + NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "maybe WinMX Send\n"); + flow->l4.tcp.winmx_stage = 1; + return; + } + + if (((packet->payload_packet_len) == 3) + && (memcmp(packet->payload, "GET", 3) == 0)) { + NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "found winmx by GET\n"); + ndpi_int_winmx_add_connection(ndpi_struct, flow); + return; + } + + + if (packet->payload_packet_len == 149 && packet->payload[0] == '8') { + NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "maybe WinMX\n"); + if (get_u_int32_t(packet->payload, 17) == 0 + && get_u_int32_t(packet->payload, 21) == 0 + && get_u_int32_t(packet->payload, 25) == 0 + && get_u_int16_t(packet->payload, 39) == 0 && get_u_int16_t(packet->payload, 135) == htons(0x7edf) + && get_u_int16_t(packet->payload, 147) == htons(0xf792)) { + + NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, + "found winmx by pattern in first packet\n"); + ndpi_int_winmx_add_connection(ndpi_struct, flow); + return; + } + } + /* did not see this pattern in any trace that we have */ + } else if (flow->l4.tcp.winmx_stage == 1) { + if (packet->payload_packet_len > 10 && packet->payload_packet_len < 1000) { + u_int16_t left = packet->payload_packet_len - 1; + while (left > 0) { + if (packet->payload[left] == ' ') { + NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "found winmx in second packet\n"); + ndpi_int_winmx_add_connection(ndpi_struct, flow); + return; + } else if (packet->payload[left] < '0' || packet->payload[left] > '9') { + break; + } + left--; + } + } + } + + NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_WINMX); +} + +#endif |