Initial import from SVN

1 files changed, 91 insertions, 0 deletions

diff --git a/src/lib/protocols/icecast.c b/src/lib/protocols/icecast.c
new file mode 100644
index 000000000..49c6f5fc5
--- /dev/null
+++ b/src/lib/protocols/icecast.c
@@ -0,0 +1,91 @@
+/*
+ * icecast.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_ICECAST
+
+static void ndpi_int_icecast_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_ICECAST, NDPI_CORRELATED_PROTOCOL);
+}
+
+void ndpi_search_icecast_tcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;
+  u_int8_t i;
+
+  NDPI_LOG(NDPI_PROTOCOL_ICECAST, ndpi_struct, NDPI_LOG_DEBUG, "search icecast.\n");
+
+  if ((packet->payload_packet_len < 500 &&
+       packet->payload_packet_len >= 7 && memcmp(packet->payload, "SOURCE ", 7) == 0)
+      || flow->l4.tcp.icecast_stage) {
+    ndpi_parse_packet_line_info_any(ndpi_struct, flow);
+    NDPI_LOG(NDPI_PROTOCOL_ICECAST, ndpi_struct, NDPI_LOG_DEBUG, "Icecast lines=%d\n", packet->parsed_lines);
+    for (i = 0; i < packet->parsed_lines; i++) {
+      if (packet->line[i].ptr != NULL && packet->line[i].len > 4
+	  && memcmp(packet->line[i].ptr, "ice-", 4) == 0) {
+	NDPI_LOG(NDPI_PROTOCOL_ICECAST, ndpi_struct, NDPI_LOG_DEBUG, "Icecast detected.\n");
+	ndpi_int_icecast_add_connection(ndpi_struct, flow);
+	return;
+      }
+    }
+
+    if (packet->parsed_lines < 1 && !flow->l4.tcp.icecast_stage) {
+      flow->l4.tcp.icecast_stage = 1;
+      return;
+    }
+  }
+#ifdef NDPI_PROTOCOL_HTTP
+  if (NDPI_FLOW_PROTOCOL_EXCLUDED(ndpi_struct, flow, NDPI_PROTOCOL_HTTP)) {
+    goto icecast_exclude;
+  }
+#endif
+
+  if (packet->packet_direction == flow->setup_packet_direction && flow->packet_counter < 10) {
+    return;
+  }
+
+  if (packet->packet_direction != flow->setup_packet_direction) {
+    /* server answer, now test Server for Icecast */
+
+    ndpi_parse_packet_line_info(ndpi_struct, flow);
+
+    if (packet->server_line.ptr != NULL && packet->server_line.len > NDPI_STATICSTRING_LEN("Icecast") &&
+	memcmp(packet->server_line.ptr, "Icecast", NDPI_STATICSTRING_LEN("Icecast")) == 0) {
+      NDPI_LOG(NDPI_PROTOCOL_ICECAST, ndpi_struct, NDPI_LOG_DEBUG, "Icecast detected.\n");
+      /* TODO maybe store the previous protocol type as subtype?
+       *      e.g. ogg or mpeg
+       */
+      ndpi_int_icecast_add_connection(ndpi_struct, flow);
+      return;
+    }
+  }
+
+ icecast_exclude:
+  NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_ICECAST);
+  NDPI_LOG(NDPI_PROTOCOL_ICECAST, ndpi_struct, NDPI_LOG_DEBUG, "Icecast excluded.\n");
+}
+#endif