1 files changed, 83 insertions, 0 deletions
diff --git a/src/lib/protocols/git.c b/src/lib/protocols/git.c
new file mode 100644
index 000000000..e156b7913
--- /dev/null
+++ b/src/lib/protocols/git.c
@@ -0,0 +1,83 @@
+/*
+ * git.c
+ *
+ * Copyright (C) 2012-16 - ntop.org
+ *
+ * This module 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.
+ *
+ * This module 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.
+ * If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#include <stdlib.h>
+#include "ndpi_api.h"
+
+#ifdef NDPI_PROTOCOL_GIT
+
+#define GIT_PORT 9418
+
+void ndpi_search_git(struct ndpi_detection_module_struct *ndpi_struct,
+		     struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct * packet = &flow->packet;
+
+  if((packet->tcp != NULL) && (packet->payload_packet_len > 4)) {
+    if((ntohs(packet->tcp->source) == GIT_PORT)
+       || (ntohs(packet->tcp->dest) == GIT_PORT)) {
+      const u_int8_t * pp = packet->payload;
+      u_int16_t payload_len = packet->payload_packet_len;  
+      u_int8_t found_git = 1;
+      u_int16_t git_len = 0, offset = 0;
+      
+      while((offset+4) < payload_len) {
+	char len[5];
+	u_int32_t git_pkt_len;
+
+	memcpy(&len, &pp[offset], 4), len[4] = 0;
+	git_pkt_len = atoi(len);
+
+	if((payload_len < git_pkt_len) || (git_pkt_len == 0 /* Bad */)) {
+	  found_git = 0;
+	  break;
+	} else
+	  offset += git_pkt_len, payload_len -= git_pkt_len;      
+      }
+
+      if(found_git) {
+	NDPI_LOG(NDPI_PROTOCOL_GIT, ndpi_struct, NDPI_LOG_DEBUG, "found Git.\n");
+	ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_GIT, NDPI_PROTOCOL_UNKNOWN);
+	return;
+      }
+    }
+  }
+  
+  NDPI_LOG(NDPI_PROTOCOL_GIT, ndpi_struct, NDPI_LOG_DEBUG, "exclude Git.\n");
+  NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_GIT);
+}
+
+
+/* ***************************************************************** */
+
+
+void init_git_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id,
+			NDPI_PROTOCOL_BITMASK *detection_bitmask)
+{
+  ndpi_set_bitmask_protocol_detection("Git", ndpi_struct, detection_bitmask, *id,
+				      NDPI_PROTOCOL_GIT,
+				      ndpi_search_git,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_TCP_WITH_PAYLOAD,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}
+
+#endif /* NDPI_PROTOCOL_GIT */