1 files changed, 67 insertions, 0 deletions
diff --git a/src/lib/protocols/http2.c b/src/lib/protocols/http2.c
new file mode 100644
index 000000000..085d10aae
--- /dev/null
+++ b/src/lib/protocols/http2.c
@@ -0,0 +1,67 @@
+/*
+ * http2.c
+ *
+ * Copyright (C) 2023 - 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_protocol_ids.h"
+
+#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_HTTP2
+
+#include "ndpi_api.h"
+
+static void ndpi_int_http2_add_connection(struct ndpi_detection_module_struct * const ndpi_struct,
+                                          struct ndpi_flow_struct * const flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found HTTP/2\n");
+  ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_HTTP2,
+                             NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+}
+
+void ndpi_search_http2(struct ndpi_detection_module_struct *ndpi_struct,
+                       struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
+  const char magic[] = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n";
+
+  NDPI_LOG_DBG(ndpi_struct, "search http2\n");
+
+  if(packet->payload_packet_len < NDPI_STATICSTRING_LEN(magic)) {
+    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+    return;
+  }
+
+  if(strncmp((char const *)packet->payload, magic, NDPI_STATICSTRING_LEN(magic)) == 0) {
+    ndpi_int_http2_add_connection(ndpi_struct, flow);
+    return;
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+void init_http2_dissector(struct ndpi_detection_module_struct *ndpi_struct,
+                          u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("HTTP/2", ndpi_struct, *id,
+                                      NDPI_PROTOCOL_HTTP2,
+                                      ndpi_search_http2,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK);
+  *id += 1;
+}