vcl: add support for app socket api

To enable add "app-socket-api /path/to/socket" to vcl.conf. On vpp side, add
use-app-socket-api to session stanza in startup.conf

VPP allocates a socket per application namespace which it places in the
app_ns_sockets subfolder of the run folder (default /var/run/vpp). The
socket used implicitly selects the app namespace for the vcl app.

Type: feature

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Ifc14b93dcbf6ef9bed1852d46cd069f4855b92ef

1 files changed, 20 insertions, 2 deletions

diff --git a/src/vcl/vcl_private.c b/src/vcl/vcl_private.c
index a07e0b165ec..fd35db0b678 100644
--- a/src/vcl/vcl_private.c
+++ b/src/vcl/vcl_private.c
@@ -101,12 +101,30 @@ vcl_worker_free (vcl_worker_t * wrk)
   pool_put (vcm->workers, wrk);
 }
 
+int
+vcl_api_app_worker_add (void)
+{
+  if (vcm->cfg.vpp_app_socket_api)
+    return vcl_sapi_app_worker_add ();
+
+  return vcl_bapi_app_worker_add ();
+}
+
+void
+vcl_api_app_worker_del (vcl_worker_t * wrk)
+{
+  if (vcm->cfg.vpp_app_socket_api)
+    return vcl_sapi_app_worker_del (wrk);
+
+  vcl_bapi_app_worker_del (wrk);
+}
+
 void
 vcl_worker_cleanup (vcl_worker_t * wrk, u8 notify_vpp)
 {
   clib_spinlock_lock (&vcm->workers_lock);
   if (notify_vpp)
-    vcl_bapi_app_worker_del (wrk);
+    vcl_api_app_worker_del (wrk);
 
   if (wrk->mqs_epfd > 0)
     close (wrk->mqs_epfd);
@@ -184,7 +202,7 @@ vcl_worker_register_with_vpp (void)
 
   clib_spinlock_lock (&vcm->workers_lock);
 
-  if (vcl_bapi_app_worker_add ())
+  if (vcl_api_app_worker_add ())
     {
       VDBG (0, "failed to add worker to vpp");
       clib_spinlock_unlock (&vcm->workers_lock);