Initial import from SVN

1 files changed, 78 insertions, 0 deletions

diff --git a/src/lib/protocols/tcp_udp.c b/src/lib/protocols/tcp_udp.c
new file mode 100644
index 000000000..da33e6e0e
--- /dev/null
+++ b/src/lib/protocols/tcp_udp.c
@@ -0,0 +1,78 @@
+/*
+ * tcp_or_udp.c
+ *
+ * Copyright (C) 2011-15 - 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"
+
+/* ndpi_main.c */
+extern u_int8_t  ndpi_is_tor_flow(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow);
+
+u_int ndpi_search_tcp_or_udp_raw(struct ndpi_detection_module_struct *ndpi_struct, 
+				 u_int8_t protocol,
+				 u_int32_t saddr, u_int32_t daddr, /* host endianess */
+				 u_int16_t sport, u_int16_t dport) /* host endianess */
+{
+  u_int16_t rc;
+
+  if(protocol == IPPROTO_UDP) {
+    if((sport == dport) && (sport == 17500)) {
+      return(NDPI_PROTOCOL_DROPBOX);
+    }
+  }
+
+  if((rc = ndpi_host_ptree_match(ndpi_struct, saddr)) != NDPI_PROTOCOL_UNKNOWN) return(rc);
+  
+  return(ndpi_host_ptree_match(ndpi_struct, daddr));
+}
+
+void ndpi_search_tcp_or_udp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  u_int16_t sport, dport;
+  u_int proto;
+  struct ndpi_packet_struct *packet = &flow->packet;
+
+  if(ndpi_is_tor_flow(ndpi_struct, flow)) {
+    ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_TOR, NDPI_REAL_PROTOCOL);
+    return;
+  }
+
+  if(packet->udp) sport = ntohs(packet->udp->source), dport = ntohs(packet->udp->dest);
+  else if(packet->tcp) sport = ntohs(packet->tcp->source), dport = ntohs(packet->tcp->dest);
+  else sport = dport = 0;
+  
+  if(packet->iph /* IPv4 Only: we need to support packet->iphv6 at some point */) {
+    proto = ndpi_search_tcp_or_udp_raw(ndpi_struct,
+				       flow->packet.iph ? flow->packet.iph->protocol :
+#ifdef NDPI_DETECTION_SUPPORT_IPV6
+				       flow->packet.iphv6->nexthdr,
+#else
+				       0,
+#endif
+				       ntohl(packet->iph->saddr), 
+				       ntohl(packet->iph->daddr),
+				       sport, dport);
+
+    if(proto != NDPI_PROTOCOL_UNKNOWN)
+      ndpi_int_add_connection(ndpi_struct, flow, proto, NDPI_REAL_PROTOCOL);
+  }
+}
+
+
+