3 files changed, 31 insertions, 1 deletions
diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h
index 2e850a98e57..a6641477f12 100644
--- a/src/vnet/session/application_interface.h
+++ b/src/vnet/session/application_interface.h
@@ -502,6 +502,14 @@ typedef struct app_unmap_segment_msg_
   u64 segment_handle;
 } session_app_del_segment_msg_t;
 
+typedef struct session_migrate_msg_
+{
+  uword vpp_evt_q;
+  session_handle_t handle;
+  session_handle_t new_handle;
+  u32 vpp_thread_index;
+} __clib_packed session_migrated_msg_t;
+
 typedef struct app_session_event_
 {
   svm_msg_q_msg_t msg;
diff --git a/src/vnet/session/session_api.c b/src/vnet/session/session_api.c
index 153c528059c..c6eeacfea18 100644
--- a/src/vnet/session/session_api.c
+++ b/src/vnet/session/session_api.c
@@ -470,7 +470,28 @@ mq_send_unlisten_reply (app_worker_t * app_wrk, session_handle_t sh,
 static void
 mq_send_session_migrate_cb (session_t * s, session_handle_t new_sh)
 {
-  clib_warning ("not supported");
+  svm_msg_q_msg_t _msg, *msg = &_msg;
+  session_migrated_msg_t *mp;
+  svm_msg_q_t *vpp_evt_q;
+  app_worker_t *app_wrk;
+  session_event_t *evt;
+  svm_msg_q_t *app_mq;
+
+  app_wrk = app_worker_get (s->app_wrk_index);
+  app_mq = app_wrk->event_queue;
+  if (mq_try_lock_and_alloc_msg (app_mq, msg))
+    return;
+
+  evt = svm_msg_q_msg_data (app_mq, msg);
+  clib_memset (evt, 0, sizeof (*evt));
+  evt->event_type = SESSION_CTRL_EVT_MIGRATED;
+  mp = (session_migrated_msg_t *) evt->data;
+  mp->handle = session_handle (s);
+  mp->new_handle = new_sh;
+  mp->vpp_thread_index = session_thread_from_handle (new_sh);
+  vpp_evt_q = session_main_get_vpp_event_queue (mp->vpp_thread_index);
+  mp->vpp_evt_q = pointer_to_uword (vpp_evt_q);
+  svm_msg_q_add_and_unlock (app_mq, msg);
 }
 
 static int
diff --git a/src/vnet/session/session_types.h b/src/vnet/session/session_types.h
index ce593b0b38c..60d5e4d823c 100644
--- a/src/vnet/session/session_types.h
+++ b/src/vnet/session/session_types.h
@@ -336,6 +336,7 @@ typedef enum
   SESSION_CTRL_EVT_APP_DETACH,
   SESSION_CTRL_EVT_APP_ADD_SEGMENT,
   SESSION_CTRL_EVT_APP_DEL_SEGMENT,
+  SESSION_CTRL_EVT_MIGRATED,
 } session_evt_type_t;
 
 #define foreach_session_ctrl_evt				\