Initial import from SVN

1 files changed, 76 insertions, 0 deletions

diff --git a/src/lib/protocols/radius.c b/src/lib/protocols/radius.c
new file mode 100644
index 000000000..0b7698a94
--- /dev/null
+++ b/src/lib/protocols/radius.c
@@ -0,0 +1,76 @@
+/*
+ * radius.c
+ *
+ * Copyright (C) 2012-15 - ntop.org
+ *
+ * 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_RADIUS
+
+struct radius_header {
+  u_int8_t code;
+  u_int8_t packet_id;
+  u_int16_t len;
+};
+
+static void ndpi_check_radius(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;  
+  // const u_int8_t *packet_payload = packet->payload;
+  u_int32_t payload_len = packet->payload_packet_len;
+
+#if 0
+  printf("[len=%u][%02X %02X %02X %02X]\n", payload_len,
+	 packet->payload[0] & 0xFF,
+	 packet->payload[1] & 0xFF,
+	 packet->payload[2] & 0xFF,
+	 packet->payload[3] & 0xFF);
+#endif
+
+  if(packet->udp != NULL) {
+    struct radius_header *h = (struct radius_header*)packet->payload;
+    u_int len = ntohs(h->len);
+
+    if((payload_len > sizeof(struct radius_header))
+       && (h->code > 0)
+       && (h->code <= 5)
+       && (len == payload_len)) {
+      NDPI_LOG(NDPI_PROTOCOL_RADIUS, ndpi_struct, NDPI_LOG_DEBUG, "Found radius.\n");
+      ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_RADIUS, NDPI_REAL_PROTOCOL);	
+      
+      return;
+    }
+    
+    NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_RADIUS);
+    return;
+  }
+}
+
+void ndpi_search_radius(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;
+
+  NDPI_LOG(NDPI_PROTOCOL_RADIUS, ndpi_struct, NDPI_LOG_DEBUG, "radius detection...\n");
+
+  /* skip marked packets */
+  if(packet->detected_protocol_stack[0] != NDPI_PROTOCOL_RADIUS)
+    ndpi_check_radius(ndpi_struct, flow);
+}
+
+#endif