session: cleanup part 1

Rename core data structures. This will break compatibility for out of
tree builtin apps.

- stream_session_t to session_t
- server_rx/tx_fifo to rx/tx_fifo
- stream_session.h to session_types.h
- update copyright

Change-Id: I414097c6e28bcbea866fbf13b8773c7db3f49325
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/session-apps/proxy.c b/src/vnet/session-apps/proxy.c
index 06c0954..063c13c 100644
--- a/src/vnet/session-apps/proxy.c
+++ b/src/vnet/session-apps/proxy.c
@@ -59,13 +59,13 @@
 }
 
 static void
-delete_proxy_session (stream_session_t * s, int is_active_open)
+delete_proxy_session (session_t * s, int is_active_open)
 {
   proxy_main_t *pm = &proxy_main;
   proxy_session_t *ps = 0;
   vnet_disconnect_args_t _a, *a = &_a;
-  stream_session_t *active_open_session = 0;
-  stream_session_t *server_session = 0;
+  session_t *active_open_session = 0;
+  session_t *server_session = 0;
   uword *p;
   u64 handle;
 
@@ -143,7 +143,7 @@
 }
 
 static int
-proxy_accept_callback (stream_session_t * s)
+proxy_accept_callback (session_t * s)
 {
   proxy_main_t *pm = &proxy_main;
 
@@ -155,13 +155,13 @@
 }
 
 static void
-proxy_disconnect_callback (stream_session_t * s)
+proxy_disconnect_callback (session_t * s)
 {
   delete_proxy_session (s, 0 /* is_active_open */ );
 }
 
 static void
-proxy_reset_callback (stream_session_t * s)
+proxy_reset_callback (session_t * s)
 {
   clib_warning ("Reset session %U", format_stream_session, s, 2);
   delete_proxy_session (s, 0 /* is_active_open */ );
@@ -169,7 +169,7 @@
 
 static int
 proxy_connected_callback (u32 app_index, u32 api_context,
-			  stream_session_t * s, u8 is_fail)
+			  session_t * s, u8 is_fail)
 {
   clib_warning ("called...");
   return -1;
@@ -183,7 +183,7 @@
 }
 
 static int
-proxy_rx_callback (stream_session_t * s)
+proxy_rx_callback (session_t * s)
 {
   u32 max_dequeue;
   int actual_transfer __attribute__ ((unused));
@@ -204,7 +204,7 @@
   if (PREDICT_TRUE (p != 0))
     {
       clib_spinlock_unlock_if_init (&pm->sessions_lock);
-      active_open_tx_fifo = s->server_rx_fifo;
+      active_open_tx_fifo = s->rx_fifo;
 
       /*
        * Send event for active open tx fifo
@@ -220,13 +220,13 @@
     }
   else
     {
-      rx_fifo = s->server_rx_fifo;
-      tx_fifo = s->server_tx_fifo;
+      rx_fifo = s->rx_fifo;
+      tx_fifo = s->tx_fifo;
 
       ASSERT (rx_fifo->master_thread_index == thread_index);
       ASSERT (tx_fifo->master_thread_index == thread_index);
 
-      max_dequeue = svm_fifo_max_dequeue (s->server_rx_fifo);
+      max_dequeue = svm_fifo_max_dequeue (s->rx_fifo);
 
       if (PREDICT_FALSE (max_dequeue == 0))
 	return 0;
@@ -272,7 +272,7 @@
 
 static int
 active_open_connected_callback (u32 app_index, u32 opaque,
-				stream_session_t * s, u8 is_fail)
+				session_t * s, u8 is_fail)
 {
   proxy_main_t *pm = &proxy_main;
   proxy_session_t *ps;
@@ -292,23 +292,23 @@
   ps = pool_elt_at_index (pm->sessions, opaque);
   ps->vpp_active_open_handle = session_handle (s);
 
-  s->server_tx_fifo = ps->server_rx_fifo;
-  s->server_rx_fifo = ps->server_tx_fifo;
+  s->tx_fifo = ps->server_rx_fifo;
+  s->rx_fifo = ps->server_tx_fifo;
 
   /*
    * Reset the active-open tx-fifo master indices so the active-open session
    * will receive data, etc.
    */
-  s->server_tx_fifo->master_session_index = s->session_index;
-  s->server_tx_fifo->master_thread_index = s->thread_index;
+  s->tx_fifo->master_session_index = s->session_index;
+  s->tx_fifo->master_thread_index = s->thread_index;
 
   /*
    * Account for the active-open session's use of the fifos
    * so they won't disappear until the last session which uses
    * them disappears
    */
-  s->server_tx_fifo->refcnt++;
-  s->server_rx_fifo->refcnt++;
+  s->tx_fifo->refcnt++;
+  s->rx_fifo->refcnt++;
 
   hash_set (pm->proxy_session_by_active_open_handle,
 	    ps->vpp_active_open_handle, opaque);
@@ -319,36 +319,36 @@
    * Send event for active open tx fifo
    */
   ASSERT (s->thread_index == thread_index);
-  if (svm_fifo_set_event (s->server_tx_fifo))
-    session_send_io_evt_to_thread (s->server_tx_fifo, FIFO_EVENT_APP_TX);
+  if (svm_fifo_set_event (s->tx_fifo))
+    session_send_io_evt_to_thread (s->tx_fifo, FIFO_EVENT_APP_TX);
 
   return 0;
 }
 
 static void
-active_open_reset_callback (stream_session_t * s)
+active_open_reset_callback (session_t * s)
 {
   delete_proxy_session (s, 1 /* is_active_open */ );
 }
 
 static int
-active_open_create_callback (stream_session_t * s)
+active_open_create_callback (session_t * s)
 {
   return 0;
 }
 
 static void
-active_open_disconnect_callback (stream_session_t * s)
+active_open_disconnect_callback (session_t * s)
 {
   delete_proxy_session (s, 1 /* is_active_open */ );
 }
 
 static int
-active_open_rx_callback (stream_session_t * s)
+active_open_rx_callback (session_t * s)
 {
   svm_fifo_t *proxy_tx_fifo;
 
-  proxy_tx_fifo = s->server_rx_fifo;
+  proxy_tx_fifo = s->rx_fifo;
 
   /*
    * Send event for server tx fifo