diff options
Diffstat (limited to 'src/lib/protocols/thunder.c')
| -rw-r--r-- | src/lib/protocols/thunder.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/lib/protocols/thunder.c b/src/lib/protocols/thunder.c new file mode 100644 index 000000000..3784bb781 --- /dev/null +++ b/src/lib/protocols/thunder.c @@ -0,0 +1,211 @@ +/* + * thunder.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_THUNDER + +static void ndpi_int_thunder_add_connection(struct ndpi_detection_module_struct *ndpi_struct, + struct ndpi_flow_struct *flow, ndpi_protocol_type_t protocol_type) +{ + 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_THUNDER, protocol_type); + + if (src != NULL) { + src->thunder_ts = packet->tick_timestamp; + } + if (dst != NULL) { + dst->thunder_ts = packet->tick_timestamp; + } +} + + + +#if !defined(WIN32) + static inline +#else +__forceinline static +#endif + void ndpi_int_search_thunder_udp(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 (packet->payload_packet_len > 8 && packet->payload[0] >= 0x30 + && packet->payload[0] < 0x40 && packet->payload[1] == 0 && packet->payload[2] == 0 && packet->payload[3] == 0) { + if (flow->thunder_stage == 3) { + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, "THUNDER udp detected\n"); + ndpi_int_thunder_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL); + return; + } + + flow->thunder_stage++; + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "maybe thunder udp packet detected, stage increased to %u\n", flow->thunder_stage); + return; + } + + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "excluding thunder udp at stage %u\n", flow->thunder_stage); + + NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_THUNDER); +} + + +#if !defined(WIN32) + static inline +#else +__forceinline static +#endif + void ndpi_int_search_thunder_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 (packet->payload_packet_len > 8 && packet->payload[0] >= 0x30 + && packet->payload[0] < 0x40 && packet->payload[1] == 0 && packet->payload[2] == 0 && packet->payload[3] == 0) { + if (flow->thunder_stage == 3) { + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, "THUNDER tcp detected\n"); + ndpi_int_thunder_add_connection(ndpi_struct, flow, NDPI_REAL_PROTOCOL); + return; + } + + flow->thunder_stage++; + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "maybe thunder tcp packet detected, stage increased to %u\n", flow->thunder_stage); + return; + } + + if (flow->thunder_stage == 0 && packet->payload_packet_len > 17 + && memcmp(packet->payload, "POST / HTTP/1.1\r\n", 17) == 0) { + ndpi_parse_packet_line_info(ndpi_struct, flow); + + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "maybe thunder http POST packet detected, parsed packet lines: %u, empty line set %u (at: %u)\n", + packet->parsed_lines, packet->empty_line_position_set, packet->empty_line_position); + + if (packet->empty_line_position_set != 0 && + packet->content_line.ptr != NULL && + packet->content_line.len == 24 && + memcmp(packet->content_line.ptr, "application/octet-stream", + 24) == 0 && packet->empty_line_position_set < (packet->payload_packet_len - 8) + && packet->payload[packet->empty_line_position + 2] >= 0x30 + && packet->payload[packet->empty_line_position + 2] < 0x40 + && packet->payload[packet->empty_line_position + 3] == 0x00 + && packet->payload[packet->empty_line_position + 4] == 0x00 + && packet->payload[packet->empty_line_position + 5] == 0x00) { + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "maybe thunder http POST packet application does match\n"); + ndpi_int_thunder_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL); + return; + } + } + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "excluding thunder tcp at stage %u\n", flow->thunder_stage); + + NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_THUNDER); +} + + +#if !defined(WIN32) + static inline +#else +__forceinline static +#endif + void ndpi_int_search_thunder_http(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_THUNDER) { + if (src != NULL && ((u_int32_t) + (packet->tick_timestamp - src->thunder_ts) < ndpi_struct->thunder_timeout)) { + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "thunder : save src connection packet detected\n"); + src->thunder_ts = packet->tick_timestamp; + } else if (dst != NULL && ((u_int32_t) + (packet->tick_timestamp - dst->thunder_ts) < ndpi_struct->thunder_timeout)) { + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "thunder : save dst connection packet detected\n"); + dst->thunder_ts = packet->tick_timestamp; + } + return; + } + + if (packet->payload_packet_len > 5 + && memcmp(packet->payload, "GET /", 5) == 0 && NDPI_SRC_OR_DST_HAS_PROTOCOL(src, dst, NDPI_PROTOCOL_THUNDER)) { + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, "HTTP packet detected.\n"); + ndpi_parse_packet_line_info(ndpi_struct, flow); + + if (packet->parsed_lines > 7 + && packet->parsed_lines < 11 + && packet->line[1].len > 10 + && memcmp(packet->line[1].ptr, "Accept: */*", 11) == 0 + && packet->line[2].len > 22 + && memcmp(packet->line[2].ptr, "Cache-Control: no-cache", + 23) == 0 && packet->line[3].len > 16 + && memcmp(packet->line[3].ptr, "Connection: close", 17) == 0 + && packet->line[4].len > 6 + && memcmp(packet->line[4].ptr, "Host: ", 6) == 0 + && packet->line[5].len > 15 + && memcmp(packet->line[5].ptr, "Pragma: no-cache", 16) == 0 + && packet->user_agent_line.ptr != NULL + && packet->user_agent_line.len > 49 + && memcmp(packet->user_agent_line.ptr, + "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)", 50) == 0) { + NDPI_LOG(NDPI_PROTOCOL_THUNDER, ndpi_struct, NDPI_LOG_DEBUG, + "Thunder HTTP download detected, adding flow.\n"); + ndpi_int_thunder_add_connection(ndpi_struct, flow, NDPI_CORRELATED_PROTOCOL); + } + } +} + +void ndpi_search_thunder(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->tcp != NULL) { + ndpi_int_search_thunder_http(ndpi_struct, flow); + ndpi_int_search_thunder_tcp(ndpi_struct, flow); + } else if (packet->udp != NULL) { + ndpi_int_search_thunder_udp(ndpi_struct, flow); + } +} + +#endif |