VPP-598: tcp stack initial commit

Change-Id: I49e5ce0aae6e4ff634024387ceaf7dbc432a0351
Signed-off-by: Dave Barach <dave@barachs.net>
Signed-off-by: Florin Coras <fcoras@cisco.com>

1 files changed, 120 insertions, 0 deletions

diff --git a/src/vnet/session/application.h b/src/vnet/session/application.h
new file mode 100644
index 00000000000..027d6967fd7
--- /dev/null
+++ b/src/vnet/session/application.h
@@ -0,0 +1,120 @@
+/*
+ * 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_APPLICATION_H_
+#define SRC_VNET_SESSION_APPLICATION_H_
+
+#include <vnet/vnet.h>
+#include <vnet/session/session.h>
+
+typedef enum
+{
+  APP_SERVER,
+  APP_CLIENT
+} application_type_t;
+
+typedef struct _stream_session_cb_vft
+{
+  /** Notify server of new segment */
+  int (*add_segment_callback) (u32 api_client_index, const u8 * seg_name,
+			       u32 seg_size);
+
+  /** Notify server of newly accepted session */
+  int (*session_accept_callback) (stream_session_t * new_session);
+
+  /* Connection request callback */
+  int (*session_connected_callback) (u32 api_client_index,
+				     stream_session_t * s, u8 code);
+
+  /** Notify app that session is closing */
+  void (*session_disconnect_callback) (stream_session_t * s);
+
+  /** Notify app that session was reset */
+  void (*session_reset_callback) (stream_session_t * s);
+
+  /* Direct RX callback, for built-in servers */
+  int (*builtin_server_rx_callback) (stream_session_t * session);
+
+  /* Redirect connection to local server */
+  int (*redirect_connect_callback) (u32 api_client_index, void *mp);
+} session_cb_vft_t;
+
+typedef struct _application
+{
+  /** Index in server pool */
+  u32 index;
+
+  /** Flags */
+  u32 flags;
+
+  /** Binary API connection index, ~0 if internal */
+  u32 api_client_index;
+
+  /* */
+  u32 api_context;
+
+  /** Application listens for events on this svm queue */
+  unix_shared_memory_queue_t *event_queue;
+
+  /** Stream session type */
+  u8 session_type;
+
+  /* Stream server mode: accept or connect */
+  u8 mode;
+
+  u32 session_manager_index;
+
+  /*
+   * Bind/Listen specific
+   */
+
+  /** Accept cookie, for multiple session flavors ($$$ maybe) */
+  u32 accept_cookie;
+
+  /** Index of the listen session or connect session */
+  u32 session_index;
+
+  /** Session thread index for client connect sessions */
+  u32 thread_index;
+
+  /*
+   * Callbacks: shoulder-taps for the server/client
+   */
+  session_cb_vft_t cb_fns;
+} application_t;
+
+application_t *application_new (application_type_t type, session_type_t sst,
+				u32 api_client_index, u32 flags,
+				session_cb_vft_t * cb_fns);
+void application_del (application_t * app);
+application_t *application_get (u32 index);
+application_t *application_lookup (u32 api_client_index);
+u32 application_get_index (application_t * app);
+
+int
+application_server_init (application_t * server, u32 segment_size,
+			 u32 add_segment_size, u32 rx_fifo_size,
+			 u32 tx_fifo_size, u8 ** segment_name);
+int application_api_queue_is_full (application_t * app);
+
+#endif /* SRC_VNET_SESSION_APPLICATION_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */