X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fapplication_interface.c;h=12a5701fdf35375cfbe7671368be5cb32443a0e2;hb=371ca50a74a9c4f1b74c4c1b65c6fdec610fcfc3;hp=4b30bd876a784c1abf2fd8bf8337ee0dabb63f2a;hpb=d79b41e993981df80245b0e6d90eb691bdaae648;p=vpp.git

diff --git a/src/vnet/session/application_interface.c b/src/vnet/session/application_interface.c
index 4b30bd876a7..12a5701fdf3 100644
--- a/src/vnet/session/application_interface.c
+++ b/src/vnet/session/application_interface.c
@@ -17,45 +17,92 @@
 #include <vnet/session/session.h>
 #include <vlibmemory/api.h>
 #include <vnet/dpo/load_balance.h>
-#include <vnet/fib/ip4_fib.h>
 
 /** @file
     VPP's application/session API bind/unbind/connect/disconnect calls
 */
 
+/*
+ * TLS server cert and keys to be used for testing only
+ */
+const char test_srv_crt_rsa[] =
+  "-----BEGIN CERTIFICATE-----\r\n"
+  "MIIDNzCCAh+gAwIBAgIBAjANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER\r\n"
+  "MA8GA1UEChMIUG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EwHhcN\r\n"
+  "MTEwMjEyMTQ0NDA2WhcNMjEwMjEyMTQ0NDA2WjA0MQswCQYDVQQGEwJOTDERMA8G\r\n"
+  "A1UEChMIUG9sYXJTU0wxEjAQBgNVBAMTCWxvY2FsaG9zdDCCASIwDQYJKoZIhvcN\r\n"
+  "AQEBBQADggEPADCCAQoCggEBAMFNo93nzR3RBNdJcriZrA545Do8Ss86ExbQWuTN\r\n"
+  "owCIp+4ea5anUrSQ7y1yej4kmvy2NKwk9XfgJmSMnLAofaHa6ozmyRyWvP7BBFKz\r\n"
+  "NtSj+uGxdtiQwWG0ZlI2oiZTqqt0Xgd9GYLbKtgfoNkNHC1JZvdbJXNG6AuKT2kM\r\n"
+  "tQCQ4dqCEGZ9rlQri2V5kaHiYcPNQEkI7mgM8YuG0ka/0LiqEQMef1aoGh5EGA8P\r\n"
+  "hYvai0Re4hjGYi/HZo36Xdh98yeJKQHFkA4/J/EwyEoO79bex8cna8cFPXrEAjya\r\n"
+  "HT4P6DSYW8tzS1KW2BGiLICIaTla0w+w3lkvEcf36hIBMJcCAwEAAaNNMEswCQYD\r\n"
+  "VR0TBAIwADAdBgNVHQ4EFgQUpQXoZLjc32APUBJNYKhkr02LQ5MwHwYDVR0jBBgw\r\n"
+  "FoAUtFrkpbPe0lL2udWmlQ/rPrzH/f8wDQYJKoZIhvcNAQEFBQADggEBAJxnXClY\r\n"
+  "oHkbp70cqBrsGXLybA74czbO5RdLEgFs7rHVS9r+c293luS/KdliLScZqAzYVylw\r\n"
+  "UfRWvKMoWhHYKp3dEIS4xTXk6/5zXxhv9Rw8SGc8qn6vITHk1S1mPevtekgasY5Y\r\n"
+  "iWQuM3h4YVlRH3HHEMAD1TnAexfXHHDFQGe+Bd1iAbz1/sH9H8l4StwX6egvTK3M\r\n"
+  "wXRwkKkvjKaEDA9ATbZx0mI8LGsxSuCqe9r9dyjmttd47J1p1Rulz3CLzaRcVIuS\r\n"
+  "RRQfaD8neM9c1S/iJ/amTVqJxA1KOdOS5780WhPfSArA+g4qAmSjelc3p4wWpha8\r\n"
+  "zhuYwjVuX6JHG0c=\r\n" "-----END CERTIFICATE-----\r\n";
+const u32 test_srv_crt_rsa_len = sizeof (test_srv_crt_rsa);
+
+const char test_srv_key_rsa[] =
+  "-----BEGIN RSA PRIVATE KEY-----\r\n"
+  "MIIEpAIBAAKCAQEAwU2j3efNHdEE10lyuJmsDnjkOjxKzzoTFtBa5M2jAIin7h5r\r\n"
+  "lqdStJDvLXJ6PiSa/LY0rCT1d+AmZIycsCh9odrqjObJHJa8/sEEUrM21KP64bF2\r\n"
+  "2JDBYbRmUjaiJlOqq3ReB30Zgtsq2B+g2Q0cLUlm91slc0boC4pPaQy1AJDh2oIQ\r\n"
+  "Zn2uVCuLZXmRoeJhw81ASQjuaAzxi4bSRr/QuKoRAx5/VqgaHkQYDw+Fi9qLRF7i\r\n"
+  "GMZiL8dmjfpd2H3zJ4kpAcWQDj8n8TDISg7v1t7HxydrxwU9esQCPJodPg/oNJhb\r\n"
+  "y3NLUpbYEaIsgIhpOVrTD7DeWS8Rx/fqEgEwlwIDAQABAoIBAQCXR0S8EIHFGORZ\r\n"
+  "++AtOg6eENxD+xVs0f1IeGz57Tjo3QnXX7VBZNdj+p1ECvhCE/G7XnkgU5hLZX+G\r\n"
+  "Z0jkz/tqJOI0vRSdLBbipHnWouyBQ4e/A1yIJdlBtqXxJ1KE/ituHRbNc4j4kL8Z\r\n"
+  "/r6pvwnTI0PSx2Eqs048YdS92LT6qAv4flbNDxMn2uY7s4ycS4Q8w1JXnCeaAnYm\r\n"
+  "WYI5wxO+bvRELR2Mcz5DmVnL8jRyml6l6582bSv5oufReFIbyPZbQWlXgYnpu6He\r\n"
+  "GTc7E1zKYQGG/9+DQUl/1vQuCPqQwny0tQoX2w5tdYpdMdVm+zkLtbajzdTviJJa\r\n"
+  "TWzL6lt5AoGBAN86+SVeJDcmQJcv4Eq6UhtRr4QGMiQMz0Sod6ettYxYzMgxtw28\r\n"
+  "CIrgpozCc+UaZJLo7UxvC6an85r1b2nKPCLQFaggJ0H4Q0J/sZOhBIXaoBzWxveK\r\n"
+  "nupceKdVxGsFi8CDy86DBfiyFivfBj+47BbaQzPBj7C4rK7UlLjab2rDAoGBAN2u\r\n"
+  "AM2gchoFiu4v1HFL8D7lweEpi6ZnMJjnEu/dEgGQJFjwdpLnPbsj4c75odQ4Gz8g\r\n"
+  "sw9lao9VVzbusoRE/JGI4aTdO0pATXyG7eG1Qu+5Yc1YGXcCrliA2xM9xx+d7f+s\r\n"
+  "mPzN+WIEg5GJDYZDjAzHG5BNvi/FfM1C9dOtjv2dAoGAF0t5KmwbjWHBhcVqO4Ic\r\n"
+  "BVvN3BIlc1ue2YRXEDlxY5b0r8N4XceMgKmW18OHApZxfl8uPDauWZLXOgl4uepv\r\n"
+  "whZC3EuWrSyyICNhLY21Ah7hbIEBPF3L3ZsOwC+UErL+dXWLdB56Jgy3gZaBeW7b\r\n"
+  "vDrEnocJbqCm7IukhXHOBK8CgYEAwqdHB0hqyNSzIOGY7v9abzB6pUdA3BZiQvEs\r\n"
+  "3LjHVd4HPJ2x0N8CgrBIWOE0q8+0hSMmeE96WW/7jD3fPWwCR5zlXknxBQsfv0gP\r\n"
+  "3BC5PR0Qdypz+d+9zfMf625kyit4T/hzwhDveZUzHnk1Cf+IG7Q+TOEnLnWAWBED\r\n"
+  "ISOWmrUCgYAFEmRxgwAc/u+D6t0syCwAYh6POtscq9Y0i9GyWk89NzgC4NdwwbBH\r\n"
+  "4AgahOxIxXx2gxJnq3yfkJfIjwf0s2DyP0kY2y6Ua1OeomPeY9mrIS4tCuDQ6LrE\r\n"
+  "TB6l9VGoxJL4fyHnZb8L5gGvnB1bbD8cL6YPaDiOhcRseC9vBiEuVg==\r\n"
+  "-----END RSA PRIVATE KEY-----\r\n";
+const u32 test_srv_key_rsa_len = sizeof (test_srv_key_rsa);
+
 static u8
-ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4)
+session_endpoint_is_local (session_endpoint_t * sep)
 {
-  if (is_ip4)
-    return (ip46_address->ip4.as_u32 == 0);
-  else
-    return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0);
+  return (ip_is_zero (&sep->ip, sep->is_ip4)
+	  || ip_is_local_host (&sep->ip, sep->is_ip4));
 }
 
 static u8
-ip_is_local (ip46_address_t * ip46_address, u8 is_ip4)
+session_endpoint_is_zero (session_endpoint_t * sep)
 {
-  fib_node_index_t fei;
-  fib_entry_flag_t flags;
-  fib_prefix_t prefix;
+  return ip_is_zero (&sep->ip, sep->is_ip4);
+}
 
-  /* Check if requester is local */
-  if (is_ip4)
-    {
-      prefix.fp_len = 32;
-      prefix.fp_proto = FIB_PROTOCOL_IP4;
-    }
-  else
+u8
+session_endpoint_in_ns (session_endpoint_t * sep)
+{
+  u8 is_zero = ip_is_zero (&sep->ip, sep->is_ip4);
+  if (!is_zero && sep->sw_if_index != ENDPOINT_INVALID_INDEX
+      && !ip_interface_has_address (sep->sw_if_index, &sep->ip, sep->is_ip4))
     {
-      prefix.fp_len = 128;
-      prefix.fp_proto = FIB_PROTOCOL_IP6;
+      clib_warning ("sw_if_index %u not configured with ip %U",
+		    sep->sw_if_index, format_ip46_address, &sep->ip,
+		    sep->is_ip4);
+      return 0;
     }
-
-  clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t));
-  fei = fib_table_lookup (0, &prefix);
-  flags = fib_entry_get_flags (fei);
-
-  return (flags & FIB_ENTRY_FLAG_LOCAL);
+  return (is_zero || ip_is_local (sep->fib_index, &sep->ip, sep->is_ip4));
 }
 
 int
@@ -78,123 +125,198 @@ api_parse_session_handle (u64 handle, u32 * session_index, u32 * thread_index)
   return 0;
 }
 
-int
-vnet_bind_i (u32 api_client_index, ip46_address_t * ip46, u16 port_host_order,
-	     session_type_t sst, u64 * options, session_cb_vft_t * cb_fns,
-	     application_t ** app, u32 * len_seg_name, char *seg_name)
+static void
+session_endpoint_update_for_app (session_endpoint_t * sep,
+				 application_t * app)
 {
-  u8 *segment_name = 0;
-  application_t *server = 0;
-  stream_session_t *listener;
-  u8 is_ip4;
-
-  listener =
-    stream_session_lookup_listener (ip46,
-				    clib_host_to_net_u16 (port_host_order),
-				    sst);
+  app_namespace_t *app_ns;
+  app_ns = app_namespace_get (app->ns_index);
+  if (app_ns)
+    {
+      /* Ask transport and network to bind to/connect using local interface
+       * that "supports" app's namespace. This will fix our local connection
+       * endpoint.
+       */
+      sep->sw_if_index = app_ns->sw_if_index;
+      sep->fib_index =
+	sep->is_ip4 ? app_ns->ip4_fib_index : app_ns->ip6_fib_index;
+    }
+}
 
-  if (listener)
-    return VNET_API_ERROR_ADDRESS_IN_USE;
+static int
+vnet_bind_i (u32 app_index, session_endpoint_t * sep, u64 * handle)
+{
+  u64 lh, ll_handle = SESSION_INVALID_HANDLE;
+  application_t *app;
+  u32 table_index;
+  int rv;
 
-  if (application_lookup (api_client_index))
+  app = application_get_if_valid (app_index);
+  if (!app)
     {
-      clib_warning ("Only one connection supported for now");
-      return VNET_API_ERROR_ADDRESS_IN_USE;
+      SESSION_DBG ("app not attached");
+      return VNET_API_ERROR_APPLICATION_NOT_ATTACHED;
     }
 
-  is_ip4 = SESSION_TYPE_IP4_UDP == sst || SESSION_TYPE_IP4_TCP == sst;
-  if (!ip_is_zero (ip46, is_ip4) && !ip_is_local (ip46, is_ip4))
-    return VNET_API_ERROR_INVALID_VALUE;
+  session_endpoint_update_for_app (sep, app);
+  if (!session_endpoint_in_ns (sep))
+    return VNET_API_ERROR_INVALID_VALUE_2;
 
-  /* Allocate and initialize stream server */
-  server = application_new (APP_SERVER, sst, api_client_index,
-			    options[SESSION_OPTIONS_FLAGS], cb_fns);
+  table_index = application_session_table (app,
+					   session_endpoint_fib_proto (sep));
+  lh = session_lookup_endpoint_listener (table_index, sep, 1);
+  if (lh != SESSION_INVALID_HANDLE)
+    return VNET_API_ERROR_ADDRESS_IN_USE;
 
-  application_server_init (server, options[SESSION_OPTIONS_SEGMENT_SIZE],
-			   options[SESSION_OPTIONS_ADD_SEGMENT_SIZE],
-			   options[SESSION_OPTIONS_RX_FIFO_SIZE],
-			   options[SESSION_OPTIONS_TX_FIFO_SIZE],
-			   &segment_name);
+  /*
+   * Add session endpoint to local session table. Only binds to "inaddr_any"
+   * (i.e., zero address) are added to local scope table.
+   */
+  if (application_has_local_scope (app) && session_endpoint_is_zero (sep))
+    {
+      if ((rv = application_start_local_listen (app, sep, handle)))
+	return rv;
+      ll_handle = *handle;
+    }
 
-  /* Setup listen path down to transport */
-  stream_session_start_listen (server->index, ip46, port_host_order);
+  if (!application_has_global_scope (app))
+    return (ll_handle == SESSION_INVALID_HANDLE ? -1 : 0);
 
   /*
-   * Return values
+   * Add session endpoint to global session table
    */
 
-  ASSERT (vec_len (segment_name) <= 128);
-  *len_seg_name = vec_len (segment_name);
-  memcpy (seg_name, segment_name, *len_seg_name);
-  *app = server;
+  /* Setup listen path down to transport */
+  rv = application_start_listen (app, sep, handle);
+  if (rv && ll_handle != SESSION_INVALID_HANDLE)
+    session_lookup_del_session_endpoint (table_index, sep);
 
-  return 0;
+  /*
+   * Store in local table listener the index of the transport layer
+   * listener. We'll need local listeners are hit and we need to
+   * return global handle
+   */
+  if (ll_handle != SESSION_INVALID_HANDLE)
+    {
+      local_session_t *ll;
+      stream_session_t *tl;
+      ll = application_get_local_listener_w_handle (ll_handle);
+      tl = listen_session_get_from_handle (*handle);
+      ll->transport_listener_index = tl->session_index;
+    }
+  return rv;
 }
 
 int
-vnet_unbind_i (u32 api_client_index)
+vnet_unbind_i (u32 app_index, session_handle_t handle)
 {
-  application_t *server;
+  application_t *app;
+  int rv;
 
-  /*
-   * Find the stream_server_t corresponding to the api client
-   */
-  server = application_lookup (api_client_index);
-  if (!server)
-    return VNET_API_ERROR_INVALID_VALUE_2;
+  if (!(app = application_get_if_valid (app_index)))
+    {
+      SESSION_DBG ("app (%d) not attached", app_index);
+      return VNET_API_ERROR_APPLICATION_NOT_ATTACHED;
+    }
 
-  /* Clear the listener */
-  stream_session_stop_listen (server->index);
-  application_del (server);
+  if (application_has_local_scope (app))
+    {
+      if ((rv = application_stop_local_listen (app, handle)))
+	return rv;
+    }
 
+  /*
+   * Clear the global scope table of the listener
+   */
+  if (application_has_global_scope (app))
+    return application_stop_listen (app, handle);
   return 0;
 }
 
 int
-vnet_connect_i (u32 api_client_index, u32 api_context, session_type_t sst,
-		ip46_address_t * ip46, u16 port, u64 * options, void *mp,
-		session_cb_vft_t * cb_fns)
+application_connect (u32 client_index, u32 api_context,
+		     session_endpoint_t * sep)
 {
+  application_t *server, *client;
+  u32 table_index, server_index, li;
   stream_session_t *listener;
-  application_t *server, *app;
+  local_session_t *ll;
+  u64 lh;
+
+  if (session_endpoint_is_zero (sep))
+    return VNET_API_ERROR_INVALID_VALUE;
+
+  client = application_get (client_index);
+  session_endpoint_update_for_app (sep, client);
 
   /*
-   * Figure out if connecting to a local server
+   * First check the local scope for locally attached destinations.
+   * If we have local scope, we pass *all* connects through it since we may
+   * have special policy rules even for non-local destinations, think proxy.
    */
-  listener = stream_session_lookup_listener (ip46,
-					     clib_host_to_net_u16 (port),
-					     sst);
-  if (listener)
+  if (application_has_local_scope (client))
     {
-      server = application_get (listener->app_index);
+      table_index = application_local_session_table (client);
+      lh = session_lookup_local_endpoint (table_index, sep);
+      if (lh == SESSION_DROP_HANDLE)
+	return VNET_API_ERROR_APP_CONNECT_FILTERED;
+
+      if (lh == SESSION_INVALID_HANDLE)
+	goto global_scope;
+
+      local_session_parse_handle (lh, &server_index, &li);
 
       /*
-       * Server is willing to have a direct fifo connection created
-       * instead of going through the state machine, etc.
+       * Break loop if rule in local table points to connecting app. This
+       * can happen if client is a generic proxy. Route connect through
+       * global table instead.
        */
-      if (server->flags & SESSION_OPTIONS_FLAGS_USE_FIFO)
-	return server->cb_fns.
-	  redirect_connect_callback (server->api_client_index, mp);
+      if (server_index != client_index)
+	{
+	  server = application_get (server_index);
+	  ll = application_get_local_listen_session (server, li);
+	  return application_local_session_connect (table_index, client,
+						    server, ll, api_context);
+	}
     }
 
-  /* Create client app */
-  app = application_new (APP_CLIENT, sst, api_client_index,
-			 options[SESSION_OPTIONS_FLAGS], cb_fns);
+  /*
+   * If nothing found, check the global scope for locally attached
+   * destinations. Make sure first that we're allowed to.
+   */
+
+global_scope:
+  if (session_endpoint_is_local (sep))
+    return VNET_API_ERROR_SESSION_CONNECT;
 
-  app->api_context = api_context;
+  if (!application_has_global_scope (client))
+    return VNET_API_ERROR_APP_CONNECT_SCOPE;
+
+  table_index = application_session_table (client,
+					   session_endpoint_fib_proto (sep));
+  listener = session_lookup_listener (table_index, sep);
+  if (listener)
+    {
+      server = application_get (listener->app_index);
+      if (server)
+	return application_local_session_connect (table_index, client, server,
+						  (local_session_t *)
+						  listener, api_context);
+    }
 
   /*
-   * Not connecting to a local server. Create regular session
+   * Not connecting to a local server, propagate to transport
    */
-  return stream_session_open (sst, ip46, port, app->index);
+  if (application_open_session (client, sep, api_context))
+    return VNET_API_ERROR_SESSION_CONNECT;
+  return 0;
 }
 
 /**
  * unformat a vnet URI
  *
- * fifo://name
- * tcp://ip46-addr:port
- * udp://ip46-addr:port
+ * transport-proto://ip46-addr:port
+ * eg. tcp://ip46-addr:port
  *
  * u8 ip46_address[16];
  * u16  port_in_host_byte_order;
@@ -209,241 +331,259 @@ vnet_connect_i (u32 api_client_index, u32 api_context, session_type_t sst,
 uword
 unformat_vnet_uri (unformat_input_t * input, va_list * args)
 {
-  ip46_address_t *address = va_arg (*args, ip46_address_t *);
-  session_type_t *sst = va_arg (*args, session_type_t *);
-  u16 *port = va_arg (*args, u16 *);
+  session_endpoint_t *sep = va_arg (*args, session_endpoint_t *);
+  u32 transport_proto = 0, port;
 
-  if (unformat (input, "tcp://%U/%d", unformat_ip4_address, &address->ip4,
-		port))
-    {
-      *sst = SESSION_TYPE_IP4_TCP;
-      return 1;
-    }
-  if (unformat (input, "udp://%U/%d", unformat_ip4_address, &address->ip4,
-		port))
+  if (unformat
+      (input, "%U://%U/%d", unformat_transport_proto, &transport_proto,
+       unformat_ip4_address, &sep->ip.ip4, &port))
     {
-      *sst = SESSION_TYPE_IP4_UDP;
+      sep->transport_proto = transport_proto;
+      sep->port = clib_host_to_net_u16 (port);
+      sep->is_ip4 = 1;
       return 1;
     }
-  if (unformat (input, "udp://%U/%d", unformat_ip6_address, &address->ip6,
-		port))
+  else if (unformat (input, "%U://%U/%d", unformat_transport_proto,
+		     &transport_proto, unformat_ip6_address, &sep->ip.ip6,
+		     &port))
     {
-      *sst = SESSION_TYPE_IP6_UDP;
+      sep->transport_proto = transport_proto;
+      sep->port = clib_host_to_net_u16 (port);
+      sep->is_ip4 = 0;
       return 1;
     }
-  if (unformat (input, "tcp://%U/%d", unformat_ip6_address, &address->ip6,
-		port))
-    {
-      *sst = SESSION_TYPE_IP6_TCP;
-      return 1;
-    }
-
   return 0;
 }
 
+static u8 *cache_uri;
+static session_endpoint_t *cache_sep;
+
 int
-parse_uri (char *uri, session_type_t * sst, ip46_address_t * addr,
-	   u16 * port_number_host_byte_order)
+parse_uri (char *uri, session_endpoint_t * sep)
 {
   unformat_input_t _input, *input = &_input;
 
+  if (cache_uri && !strncmp (uri, (char *) cache_uri, vec_len (cache_uri)))
+    {
+      *sep = *cache_sep;
+      return 0;
+    }
+
   /* Make sure */
   uri = (char *) format (0, "%s%c", uri, 0);
 
   /* Parse uri */
   unformat_init_string (input, uri, strlen (uri));
-  if (!unformat (input, "%U", unformat_vnet_uri, addr, sst,
-		 port_number_host_byte_order))
+  if (!unformat (input, "%U", unformat_vnet_uri, sep))
     {
       unformat_free (input);
       return VNET_API_ERROR_INVALID_VALUE;
     }
   unformat_free (input);
 
+  vec_free (cache_uri);
+  cache_uri = (u8 *) uri;
+  if (cache_sep)
+    clib_mem_free (cache_sep);
+  cache_sep = clib_mem_alloc (sizeof (*sep));
+  *cache_sep = *sep;
+
   return 0;
 }
 
-int
-vnet_bind_uri (vnet_bind_args_t * a)
+static int
+session_validate_namespace (u8 * namespace_id, u64 secret, u32 * app_ns_index)
+{
+  app_namespace_t *app_ns;
+  if (vec_len (namespace_id) == 0)
+    {
+      /* Use default namespace */
+      *app_ns_index = 0;
+      return 0;
+    }
+
+  *app_ns_index = app_namespace_index_from_id (namespace_id);
+  if (*app_ns_index == APP_NAMESPACE_INVALID_INDEX)
+    return VNET_API_ERROR_APP_INVALID_NS;
+  app_ns = app_namespace_get (*app_ns_index);
+  if (!app_ns)
+    return VNET_API_ERROR_APP_INVALID_NS;
+  if (app_ns->ns_secret != secret)
+    return VNET_API_ERROR_APP_WRONG_NS_SECRET;
+  return 0;
+}
+
+/**
+ * Attach application to vpp
+ *
+ * Allocates a vpp app, i.e., a structure that keeps back pointers
+ * to external app and a segment manager for shared memory fifo based
+ * communication with the external app.
+ */
+clib_error_t *
+vnet_application_attach (vnet_app_attach_args_t * a)
 {
-  application_t *server = 0;
-  u16 port_host_order;
-  session_type_t sst = SESSION_N_TYPES;
-  ip46_address_t ip46;
+  svm_fifo_segment_private_t *fs;
+  application_t *app = 0;
+  segment_manager_t *sm;
+  u32 app_ns_index = 0;
+  u64 secret;
   int rv;
 
-  memset (&ip46, 0, sizeof (ip46));
-  rv = parse_uri (a->uri, &sst, &ip46, &port_host_order);
-  if (rv)
-    return rv;
+  app = application_lookup (a->api_client_index);
+  if (app)
+    return clib_error_return_code (0, VNET_API_ERROR_APP_ALREADY_ATTACHED,
+				   0, "app already attached");
 
-  if ((rv = vnet_bind_i (a->api_client_index, &ip46, port_host_order, sst,
-			 a->options, a->session_cb_vft, &server,
-			 &a->segment_name_length, a->segment_name)))
-    return rv;
+  secret = a->options[APP_OPTIONS_NAMESPACE_SECRET];
+  if ((rv = session_validate_namespace (a->namespace_id, secret,
+					&app_ns_index)))
+    return clib_error_return_code (0, rv, 0, "namespace validation: %d", rv);
+  a->options[APP_OPTIONS_NAMESPACE] = app_ns_index;
+  app = application_new ();
+  if ((rv = application_init (app, a->api_client_index, a->options,
+			      a->session_cb_vft)))
+    return clib_error_return_code (0, rv, 0, "app init: %d", rv);
+
+  a->app_event_queue_address = pointer_to_uword (app->event_queue);
+  sm = segment_manager_get (app->first_segment_manager);
+  fs = segment_manager_get_segment_w_lock (sm, 0);
+
+  if (application_is_proxy (app))
+    application_setup_proxy (app);
+
+  ASSERT (vec_len (fs->ssvm.name) <= 128);
+  a->segment = &fs->ssvm;
+  a->app_index = app->index;
+
+  segment_manager_segment_reader_unlock (sm);
 
-  a->server_event_queue_address = (u64) server->event_queue;
   return 0;
 }
 
-session_type_t
-session_type_from_proto_and_ip (session_api_proto_t proto, u8 is_ip4)
+/**
+ * Detach application from vpp
+ */
+int
+vnet_application_detach (vnet_app_detach_args_t * a)
 {
-  if (proto == SESSION_PROTO_TCP)
-    {
-      if (is_ip4)
-	return SESSION_TYPE_IP4_TCP;
-      else
-	return SESSION_TYPE_IP6_TCP;
-    }
-  else
+  application_t *app;
+  app = application_get_if_valid (a->app_index);
+
+  if (!app)
     {
-      if (is_ip4)
-	return SESSION_TYPE_IP4_UDP;
-      else
-	return SESSION_TYPE_IP6_UDP;
+      clib_warning ("app not attached");
+      return VNET_API_ERROR_APPLICATION_NOT_ATTACHED;
     }
 
-  return SESSION_N_TYPES;
+  application_del (app);
+  return 0;
 }
 
 int
-vnet_unbind_uri (char *uri, u32 api_client_index)
+vnet_bind_uri (vnet_bind_args_t * a)
 {
-  u16 port_number_host_byte_order;
-  session_type_t sst = SESSION_N_TYPES;
-  ip46_address_t ip46_address;
-  stream_session_t *listener;
+  session_endpoint_t sep = SESSION_ENDPOINT_NULL;
   int rv;
 
-  rv = parse_uri (uri, &sst, &ip46_address, &port_number_host_byte_order);
+  rv = parse_uri (a->uri, &sep);
   if (rv)
     return rv;
 
-  listener =
-    stream_session_lookup_listener (&ip46_address,
-				    clib_host_to_net_u16
-				    (port_number_host_byte_order), sst);
+  return vnet_bind_i (a->app_index, &sep, &a->handle);
+}
+
+int
+vnet_unbind_uri (vnet_unbind_args_t * a)
+{
+  session_endpoint_t sep = SESSION_ENDPOINT_NULL;
+  stream_session_t *listener;
+  int rv;
+
+  rv = parse_uri (a->uri, &sep);
+  if (rv)
+    return rv;
 
+  /* NOTE: only default table supported for uri */
+  listener = session_lookup_listener (0, &sep);
   if (!listener)
     return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
 
-  /* External client? */
-  if (api_client_index != ~0)
-    {
-      ASSERT (vl_api_client_index_to_registration (api_client_index));
-    }
-
-  return vnet_unbind_i (api_client_index);
+  return vnet_unbind_i (a->app_index, listen_session_get_handle (listener));
 }
 
-int
+clib_error_t *
 vnet_connect_uri (vnet_connect_args_t * a)
 {
-  ip46_address_t ip46_address;
-  u16 port;
-  session_type_t sst;
-  application_t *app;
+  session_endpoint_t sep = SESSION_ENDPOINT_NULL;
   int rv;
 
-  app = application_lookup (a->api_client_index);
-  if (app)
-    {
-      clib_warning ("Already have a connect from this app");
-      return VNET_API_ERROR_INVALID_VALUE_2;
-    }
-
   /* Parse uri */
-  rv = parse_uri (a->uri, &sst, &ip46_address, &port);
+  rv = parse_uri (a->uri, &sep);
   if (rv)
-    return rv;
+    return clib_error_return_code (0, rv, 0, "app init: %d", rv);
 
-  return vnet_connect_i (a->api_client_index, a->api_context, sst,
-			 &ip46_address, port, a->options, a->mp,
-			 a->session_cb_vft);
+  if ((rv = application_connect (a->app_index, a->api_context, &sep)))
+    return clib_error_return_code (0, rv, 0, "connect failed");
+  return 0;
 }
 
 int
-vnet_disconnect_session (u32 session_index, u32 thread_index)
+vnet_disconnect_session (vnet_disconnect_args_t * a)
 {
-  stream_session_t *session;
+  if (session_handle_is_local (a->handle))
+    {
+      local_session_t *ls;
+      ls = application_get_local_session_from_handle (a->handle);
+      if (ls->app_index != a->app_index && ls->client_index != a->app_index)
+	{
+	  clib_warning ("app %u is neither client nor server for session %u",
+			a->app_index, a->app_index);
+	  return VNET_API_ERROR_INVALID_VALUE;
+	}
+      return application_local_session_disconnect (a->app_index, ls);
+    }
+  else
+    {
+      stream_session_t *s;
+      s = session_get_from_handle_if_valid (a->handle);
+      if (!s || s->app_index != a->app_index)
+	return VNET_API_ERROR_INVALID_VALUE;
 
-  session = stream_session_get (session_index, thread_index);
-  stream_session_disconnect (session);
+      /* We're peeking into another's thread pool. Make sure */
+      ASSERT (s->session_index == session_index_from_handle (a->handle));
 
+      stream_session_disconnect (s);
+    }
   return 0;
 }
 
-
-int
+clib_error_t *
 vnet_bind (vnet_bind_args_t * a)
 {
-  application_t *server = 0;
-  session_type_t sst = SESSION_N_TYPES;
   int rv;
-
-  sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4);
-  if ((rv = vnet_bind_i (a->api_client_index, &a->tep.ip, a->tep.port, sst,
-			 a->options, a->session_cb_vft, &server,
-			 &a->segment_name_length, a->segment_name)))
-    return rv;
-
-  a->server_event_queue_address = (u64) server->event_queue;
-  a->handle = (u64) a->tep.vrf << 32 | (u64) server->session_index;
+  if ((rv = vnet_bind_i (a->app_index, &a->sep, &a->handle)))
+    return clib_error_return_code (0, rv, 0, "bind failed");
   return 0;
 }
 
-int
+clib_error_t *
 vnet_unbind (vnet_unbind_args_t * a)
 {
-  application_t *server;
-
-  if (a->api_client_index != ~0)
-    {
-      ASSERT (vl_api_client_index_to_registration (a->api_client_index));
-    }
-
-  /* Make sure this is the right one */
-  server = application_lookup (a->api_client_index);
-  ASSERT (server->session_index == (0xFFFFFFFF & a->handle));
-
-  /* TODO use handle to disambiguate namespaces/vrfs */
-  return vnet_unbind_i (a->api_client_index);
+  int rv;
+  if ((rv = vnet_unbind_i (a->app_index, a->handle)))
+    return clib_error_return_code (0, rv, 0, "unbind failed");
+  return 0;
 }
 
-int
+clib_error_t *
 vnet_connect (vnet_connect_args_t * a)
 {
-  session_type_t sst;
-  application_t *app;
-
-  app = application_lookup (a->api_client_index);
-  if (app)
-    {
-      clib_warning ("Already have a connect from this app");
-      return VNET_API_ERROR_INVALID_VALUE_2;
-    }
-
-  sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4);
-  return vnet_connect_i (a->api_client_index, a->api_context, sst, &a->tep.ip,
-			 a->tep.port, a->options, a->mp, a->session_cb_vft);
-}
-
-int
-vnet_disconnect (vnet_disconnect_args_t * a)
-{
-  stream_session_t *session;
-  u32 session_index, thread_index;
-
-  if (api_parse_session_handle (a->handle, &session_index, &thread_index))
-    {
-      clib_warning ("Invalid handle");
-      return -1;
-    }
-
-  session = stream_session_get (session_index, thread_index);
-  stream_session_disconnect (session);
+  session_endpoint_t *sep = &a->sep;
+  int rv;
 
+  if ((rv = application_connect (a->app_index, a->api_context, sep)))
+    return clib_error_return_code (0, rv, 0, "connect failed");
   return 0;
 }