Cleanup/refactor session layer code

Change-Id: Ica99e8cb919fca6b069c37c969d60e8ccc2c6bf9
Signed-off-by: Florin Coras <fcoras@cisco.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/src/vnet/session/transport_interface.h b/src/vnet/session/transport_interface.h
new file mode 100644
index 00000000000..b7e86ee7960
--- /dev/null
+++ b/src/vnet/session/transport_interface.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SRC_VNET_SESSION_TRANSPORT_INTERFACE_H_
+#define SRC_VNET_SESSION_TRANSPORT_INTERFACE_H_
+
+#include <vnet/vnet.h>
+#include <vnet/session/transport.h>
+
+/*
+ * Transport protocol virtual function table
+ */
+typedef struct _transport_proto_vft
+{
+  /*
+   * Setup
+   */
+  u32 (*bind) (u32 session_index, transport_endpoint_t * lcl);
+  u32 (*unbind) (u32);
+  int (*open) (transport_endpoint_t * rmt);
+  void (*close) (u32 conn_index, u32 thread_index);
+  void (*cleanup) (u32 conn_index, u32 thread_index);
+
+  /*
+   * Transmission
+   */
+    u32 (*push_header) (transport_connection_t * tconn, vlib_buffer_t * b);
+    u16 (*send_mss) (transport_connection_t * tc);
+    u32 (*send_space) (transport_connection_t * tc);
+    u32 (*tx_fifo_offset) (transport_connection_t * tc);
+
+  /*
+   * Connection retrieval
+   */
+  transport_connection_t *(*get_connection) (u32 conn_idx, u32 thread_idx);
+  transport_connection_t *(*get_listener) (u32 conn_index);
+  transport_connection_t *(*get_half_open) (u32 conn_index);
+
+  /*
+   * Format
+   */
+  u8 *(*format_connection) (u8 * s, va_list * args);
+  u8 *(*format_listener) (u8 * s, va_list * args);
+  u8 *(*format_half_open) (u8 * s, va_list * args);
+} transport_proto_vft_t;
+
+typedef clib_bihash_24_8_t transport_endpoint_table_t;
+
+#define TRANSPORT_ENDPOINT_INVALID_INDEX ((u32)~0)
+
+u32 transport_endpoint_lookup (transport_endpoint_table_t * ht,
+			       ip46_address_t * ip, u16 port);
+void transport_endpoint_table_add (transport_endpoint_table_t * ht,
+				   transport_endpoint_t * te, u32 value);
+void transport_endpoint_table_del (transport_endpoint_table_t * ht,
+				   transport_endpoint_t * te);
+
+void session_register_transport (u8 session_type,
+				 const transport_proto_vft_t * vft);
+transport_proto_vft_t *session_get_transport_vft (u8 session_type);
+
+#endif /* SRC_VNET_SESSION_TRANSPORT_INTERFACE_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */