diff options
Diffstat (limited to 'src/lib/protocols/shoutcast.c')
| -rw-r--r-- | src/lib/protocols/shoutcast.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/lib/protocols/shoutcast.c b/src/lib/protocols/shoutcast.c new file mode 100644 index 000000000..f700db330 --- /dev/null +++ b/src/lib/protocols/shoutcast.c @@ -0,0 +1,107 @@ +/* + * shoutcast.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_SHOUTCAST + +static void ndpi_int_shoutcast_add_connection(struct ndpi_detection_module_struct + *ndpi_struct, struct ndpi_flow_struct *flow) +{ + ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_SHOUTCAST, NDPI_CORRELATED_PROTOCOL); +} + +void ndpi_search_shoutcast_tcp(struct ndpi_detection_module_struct + *ndpi_struct, struct ndpi_flow_struct *flow) +{ + struct ndpi_packet_struct *packet = &flow->packet; + + + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "search shoutcast.\n"); + + if (flow->packet_counter == 1) { +/* this case in paul_upload_oddcast_002.pcap */ + if (packet->payload_packet_len >= 6 + && packet->payload_packet_len < 80 && memcmp(packet->payload, "123456", 6) == 0) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "Shoutcast stage 1, \"123456\".\n"); + return; + } + if (flow->packet_counter < 3 +#ifdef NDPI_PROTOCOL_HTTP + && packet->detected_protocol_stack[0] == NDPI_PROTOCOL_HTTP +#endif + ) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, + "http detected, need next packet for shoutcast detection.\n"); + if (packet->payload_packet_len > 4 + && get_u_int32_t(packet->payload, packet->payload_packet_len - 4) != htonl(0x0d0a0d0a)) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "segmented packet found.\n"); + flow->l4.tcp.shoutcast_stage = 1 + packet->packet_direction; + } + return; + } + + + /* else + goto exclude_shoutcast; */ + + } + /* evtl. für asym detection noch User-Agent:Winamp dazunehmen. */ + if (packet->payload_packet_len > 11 && memcmp(packet->payload, "ICY 200 OK\x0d\x0a", 12) == 0) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "found shoutcast by ICY 200 OK.\n"); + ndpi_int_shoutcast_add_connection(ndpi_struct, flow); + return; + } + if (flow->l4.tcp.shoutcast_stage == 1 + packet->packet_direction + && flow->packet_direction_counter[packet->packet_direction] < 5) { + return; + } + + if (flow->packet_counter == 2) { + if (packet->payload_packet_len == 2 && memcmp(packet->payload, "\x0d\x0a", 2) == 0) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "Shoutcast stage 1 continuation.\n"); + return; + } else if (packet->payload_packet_len > 3 && memcmp(&packet->payload[0], "OK2", 3) == 0) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "Shoutcast stage 2, OK2 found.\n"); + return; + } else + goto exclude_shoutcast; + } else if (flow->packet_counter == 3 || flow->packet_counter == 4) { + if (packet->payload_packet_len > 3 && memcmp(&packet->payload[0], "OK2", 3) == 0) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "Shoutcast stage 2, OK2 found.\n"); + return; + } else if (packet->payload_packet_len > 4 && memcmp(&packet->payload[0], "icy-", 4) == 0) { + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "Shoutcast detected.\n"); + ndpi_int_shoutcast_add_connection(ndpi_struct, flow); + return; + } else + goto exclude_shoutcast; + } + + exclude_shoutcast: + NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_SHOUTCAST); + NDPI_LOG(NDPI_PROTOCOL_SHOUTCAST, ndpi_struct, NDPI_LOG_DEBUG, "Shoutcast excluded.\n"); +} +#endif |