vcl/ldp: add locked sessions shim layer

Moves LDP logic that allows sharing of sessions between multi-process
app workers into a separate VCL shim layer. Also refactors LDP to use
the new layer.

Change-Id: I8198b51eae7d099a8c486e36b29e3a0cb8cee8e9
Signed-off-by: Florin Coras <fcoras@cisco.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/src/vcl/vcl_locked.h b/src/vcl/vcl_locked.h
new file mode 100644
index 00000000000..4f40f434cc5
--- /dev/null
+++ b/src/vcl/vcl_locked.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this
+ * 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.
+ *
+ * VCL Locked Sessions
+ */
+
+#ifndef SRC_VCL_VCL_LOCKED_H_
+#define SRC_VCL_VCL_LOCKED_H_
+
+#include <vcl/vppcom.h>
+
+#define VLS_INVALID_HANDLE ((int)-1)
+
+typedef int vls_handle_t;
+
+vls_handle_t vls_create (uint8_t proto, uint8_t is_nonblocking);
+int vls_close (vls_handle_t vlsh);
+int vls_bind (vls_handle_t vlsh, vppcom_endpt_t * ep);
+int vls_listen (vls_handle_t vlsh, int q_len);
+int vls_connect (vls_handle_t vlsh, vppcom_endpt_t * server_ep);
+vls_handle_t vls_accept (vls_handle_t vlsh, vppcom_endpt_t * ep, int flags);
+ssize_t vls_read (vls_handle_t vlsh, void *buf, size_t nbytes);
+ssize_t vls_recvfrom (vls_handle_t vlsh, void *buffer, uint32_t buflen,
+		      int flags, vppcom_endpt_t * ep);
+int vls_write (vls_handle_t vlsh, void *buf, size_t nbytes);
+int vls_write_msg (vls_handle_t vlsh, void *buf, size_t nbytes);
+int vls_sendto (vls_handle_t vlsh, void *buf, int buflen, int flags,
+		vppcom_endpt_t * ep);
+int vls_attr (vls_handle_t vlsh, uint32_t op, void *buffer,
+	      uint32_t * buflen);
+vls_handle_t vls_epoll_create (void);
+int vls_epoll_ctl (vls_handle_t ep_vlsh, int op, vls_handle_t vlsh,
+		   struct epoll_event *event);
+int vls_epoll_wait (vls_handle_t ep_vlsh, struct epoll_event *events,
+		    int maxevents, double wait_for_time);
+vcl_session_handle_t vlsh_to_sh (vls_handle_t vlsh);
+vcl_session_handle_t vlsh_to_session_index (vls_handle_t vlsh);
+vls_handle_t vls_session_index_to_vlsh (uint32_t session_index);
+int vls_app_create (char *app_name);
+
+#endif /* SRC_VCL_VCL_LOCKED_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */