--- /dev/null
+/*
+* Copyright (c) 2015-2017 Cisco and/or its affiliates.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* 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.
+*/
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+#include <vnet/session/application.h>
+#include <vnet/session/application_interface.h>
+#include <vnet/session-apps/proxy.h>
+
+proxy_main_t proxy_main;
+
+static void
+delete_proxy_session (stream_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;
+ uword *p;
+ u64 handle;
+
+ handle = session_handle (s);
+
+ clib_spinlock_lock_if_init (&pm->sessions_lock);
+ if (is_active_open)
+ {
+ active_open_session = s;
+
+ p = hash_get (pm->proxy_session_by_active_open_handle, handle);
+ if (p == 0)
+ {
+ clib_warning ("proxy session for %s handle %lld (%llx) AWOL",
+ is_active_open ? "active open" : "server",
+ handle, handle);
+ }
+ else
+ {
+ ps = pool_elt_at_index (pm->sessions, p[0]);
+ if (ps->vpp_server_handle != ~0)
+ server_session = session_get_from_handle (ps->vpp_server_handle);
+ else
+ server_session = 0;
+ }
+ }
+ else
+ {
+ server_session = s;
+
+ p = hash_get (pm->proxy_session_by_server_handle, handle);
+ if (p == 0)
+ {
+ clib_warning ("proxy session for %s handle %lld (%llx) AWOL",
+ is_active_open ? "active open" : "server",
+ handle, handle);
+ }
+ else
+ {
+ ps = pool_elt_at_index (pm->sessions, p[0]);
+ if (ps->vpp_server_handle != ~0)
+ active_open_session = session_get_from_handle
+ (ps->vpp_server_handle);
+ else
+ active_open_session = 0;
+ }
+ }
+
+ if (ps)
+ {
+ if (CLIB_DEBUG > 0)
+ memset (ps, 0xFE, sizeof (*ps));
+ pool_put (pm->sessions, ps);
+ }
+
+ clib_spinlock_unlock_if_init (&pm->sessions_lock);
+
+ if (active_open_session)
+ {
+ a->handle = session_handle (active_open_session);
+ a->app_index = pm->active_open_app_index;
+ hash_unset (pm->proxy_session_by_active_open_handle,
+ session_handle (active_open_session));
+ vnet_disconnect_session (a);
+ }
+
+ if (server_session)
+ {
+ a->handle = session_handle (server_session);
+ a->app_index = pm->server_app_index;
+ hash_unset (pm->proxy_session_by_server_handle,
+ session_handle (server_session));
+ vnet_disconnect_session (a);
+ }
+}
+
+static int
+proxy_accept_callback (stream_session_t * s)
+{
+ proxy_main_t *pm = &proxy_main;
+
+ s->session_state = SESSION_STATE_READY;
+
+ clib_spinlock_lock_if_init (&pm->sessions_lock);
+
+ return 0;
+}
+
+static void
+proxy_disconnect_callback (stream_session_t * s)
+{
+ delete_proxy_session (s, 0 /* is_active_open */ );
+}
+
+static void
+proxy_reset_callback (stream_session_t * s)
+{
+ clib_warning ("Reset session %U", format_stream_session, s, 2);
+ delete_proxy_session (s, 0 /* is_active_open */ );
+}
+
+static int
+proxy_connected_callback (u32 app_index, u32 api_context,
+ stream_session_t * s, u8 is_fail)
+{
+ clib_warning ("called...");
+ return -1;
+}
+
+static int
+proxy_add_segment_callback (u32 client_index, const ssvm_private_t * sp)
+{
+ clib_warning ("called...");
+ return -1;
+}
+
+static int
+proxy_redirect_connect_callback (u32 client_index, void *mp)
+{
+ clib_warning ("called...");
+ return -1;
+}
+
+static int
+proxy_rx_callback (stream_session_t * s)
+{
+ u32 max_dequeue;
+ int actual_transfer __attribute__ ((unused));
+ svm_fifo_t *tx_fifo, *rx_fifo;
+ proxy_main_t *pm = &proxy_main;
+ u32 thread_index = vlib_get_thread_index ();
+ vnet_connect_args_t _a, *a = &_a;
+ proxy_session_t *ps;
+ int proxy_index;
+ uword *p;
+ svm_fifo_t *active_open_tx_fifo;
+ session_fifo_event_t evt;
+
+ ASSERT (s->thread_index == thread_index);
+
+ clib_spinlock_lock_if_init (&pm->sessions_lock);
+ p = hash_get (pm->proxy_session_by_server_handle, session_handle (s));
+
+ if (PREDICT_TRUE (p != 0))
+ {
+ clib_spinlock_unlock_if_init (&pm->sessions_lock);
+ active_open_tx_fifo = s->server_rx_fifo;
+
+ /*
+ * Send event for active open tx fifo
+ */
+ if (svm_fifo_set_event (active_open_tx_fifo))
+ {
+ evt.fifo = active_open_tx_fifo;
+ evt.event_type = FIFO_EVENT_APP_TX;
+ if (svm_queue_add
+ (pm->active_open_event_queue[thread_index], (u8 *) & evt,
+ 0 /* do wait for mutex */ ))
+ clib_warning ("failed to enqueue tx evt");
+ }
+ }
+ else
+ {
+ rx_fifo = s->server_rx_fifo;
+ tx_fifo = s->server_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);
+
+ if (PREDICT_FALSE (max_dequeue == 0))
+ return 0;
+
+ actual_transfer = svm_fifo_peek (rx_fifo, 0 /* relative_offset */ ,
+ max_dequeue, pm->rx_buf[thread_index]);
+
+ /* $$$ your message in this space: parse url, etc. */
+
+ memset (a, 0, sizeof (*a));
+
+ clib_spinlock_lock_if_init (&pm->sessions_lock);
+ pool_get (pm->sessions, ps);
+ memset (ps, 0, sizeof (*ps));
+ ps->server_rx_fifo = rx_fifo;
+ ps->server_tx_fifo = tx_fifo;
+ ps->vpp_server_handle = session_handle (s);
+
+ proxy_index = ps - pm->sessions;
+
+ hash_set (pm->proxy_session_by_server_handle, ps->vpp_server_handle,
+ proxy_index);
+
+ clib_spinlock_unlock_if_init (&pm->sessions_lock);
+
+ a->uri = (char *) pm->client_uri;
+ a->api_context = proxy_index;
+ a->app_index = pm->active_open_app_index;
+ a->mp = 0;
+ vnet_connect_uri (a);
+ }
+
+ return 0;
+}
+
+static session_cb_vft_t proxy_session_cb_vft = {
+ .session_accept_callback = proxy_accept_callback,
+ .session_disconnect_callback = proxy_disconnect_callback,
+ .session_connected_callback = proxy_connected_callback,
+ .add_segment_callback = proxy_add_segment_callback,
+ .redirect_connect_callback = proxy_redirect_connect_callback,
+ .builtin_server_rx_callback = proxy_rx_callback,
+ .session_reset_callback = proxy_reset_callback
+};
+
+static int
+active_open_connected_callback (u32 app_index, u32 opaque,
+ stream_session_t * s, u8 is_fail)
+{
+ proxy_main_t *pm = &proxy_main;
+ proxy_session_t *ps;
+ u8 thread_index = vlib_get_thread_index ();
+ session_fifo_event_t evt;
+
+ if (is_fail)
+ {
+ clib_warning ("connection %d failed!", opaque);
+ return 0;
+ }
+
+ /*
+ * Setup proxy session handle.
+ */
+ clib_spinlock_lock_if_init (&pm->sessions_lock);
+
+ 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;
+
+ /*
+ * 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;
+
+ /*
+ * 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++;
+
+ hash_set (pm->proxy_session_by_active_open_handle,
+ ps->vpp_active_open_handle, opaque);
+
+ clib_spinlock_unlock_if_init (&pm->sessions_lock);
+
+ /*
+ * Send event for active open tx fifo
+ */
+ if (svm_fifo_set_event (s->server_tx_fifo))
+ {
+ evt.fifo = s->server_tx_fifo;
+ evt.event_type = FIFO_EVENT_APP_TX;
+ if (svm_queue_add
+ (pm->active_open_event_queue[thread_index], (u8 *) & evt,
+ 0 /* do wait for mutex */ ))
+ clib_warning ("failed to enqueue tx evt");
+ }
+
+ return 0;
+}
+
+static void
+active_open_reset_callback (stream_session_t * s)
+{
+ delete_proxy_session (s, 1 /* is_active_open */ );
+}
+
+static int
+active_open_create_callback (stream_session_t * s)
+{
+ return 0;
+}
+
+static void
+active_open_disconnect_callback (stream_session_t * s)
+{
+ delete_proxy_session (s, 1 /* is_active_open */ );
+}
+
+static int
+active_open_rx_callback (stream_session_t * s)
+{
+ proxy_main_t *pm = &proxy_main;
+ session_fifo_event_t evt;
+ svm_fifo_t *server_rx_fifo;
+ u32 thread_index = vlib_get_thread_index ();
+
+ server_rx_fifo = s->server_rx_fifo;
+
+ /*
+ * Send event for server tx fifo
+ */
+ if (svm_fifo_set_event (server_rx_fifo))
+ {
+ evt.fifo = server_rx_fifo;
+ evt.event_type = FIFO_EVENT_APP_TX;
+ if (svm_queue_add
+ (pm->server_event_queue[thread_index], (u8 *) & evt,
+ 0 /* do wait for mutex */ ))
+ clib_warning ("failed to enqueue server rx evt");
+ }
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+static session_cb_vft_t active_open_clients = {
+ .session_reset_callback = active_open_reset_callback,
+ .session_connected_callback = active_open_connected_callback,
+ .session_accept_callback = active_open_create_callback,
+ .session_disconnect_callback = active_open_disconnect_callback,
+ .builtin_server_rx_callback = active_open_rx_callback
+};
+/* *INDENT-ON* */
+
+
+static void
+create_api_loopbacks (vlib_main_t * vm)
+{
+ proxy_main_t *pm = &proxy_main;
+ api_main_t *am = &api_main;
+ vl_shmem_hdr_t *shmem_hdr;
+
+ shmem_hdr = am->shmem_hdr;
+ pm->vl_input_queue = shmem_hdr->vl_input_queue;
+ pm->server_client_index =
+ vl_api_memclnt_create_internal ("proxy_server", pm->vl_input_queue);
+ pm->active_open_client_index =
+ vl_api_memclnt_create_internal ("proxy_active_open", pm->vl_input_queue);
+}
+
+static int
+proxy_server_attach ()
+{
+ proxy_main_t *pm = &proxy_main;
+ u64 options[APP_OPTIONS_N_OPTIONS];
+ vnet_app_attach_args_t _a, *a = &_a;
+ u32 segment_size = 512 << 20;
+
+ memset (a, 0, sizeof (*a));
+ memset (options, 0, sizeof (options));
+
+ if (pm->private_segment_size)
+ segment_size = pm->private_segment_size;
+ a->api_client_index = pm->server_client_index;
+ a->session_cb_vft = &proxy_session_cb_vft;
+ a->options = options;
+ a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size;
+ a->options[APP_OPTIONS_RX_FIFO_SIZE] = pm->fifo_size;
+ a->options[APP_OPTIONS_TX_FIFO_SIZE] = pm->fifo_size;
+ a->options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = pm->private_segment_count;
+ a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] =
+ pm->prealloc_fifos ? pm->prealloc_fifos : 1;
+
+ a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
+
+ if (vnet_application_attach (a))
+ {
+ clib_warning ("failed to attach server");
+ return -1;
+ }
+ pm->server_app_index = a->app_index;
+
+ return 0;
+}
+
+static int
+active_open_attach (void)
+{
+ proxy_main_t *pm = &proxy_main;
+ vnet_app_attach_args_t _a, *a = &_a;
+ u64 options[16];
+
+ memset (a, 0, sizeof (*a));
+ memset (options, 0, sizeof (options));
+
+ a->api_client_index = pm->active_open_client_index;
+ a->session_cb_vft = &active_open_clients;
+
+ options[APP_OPTIONS_ACCEPT_COOKIE] = 0x12345678;
+ options[APP_OPTIONS_SEGMENT_SIZE] = 512 << 20;
+ options[APP_OPTIONS_RX_FIFO_SIZE] = pm->fifo_size;
+ options[APP_OPTIONS_TX_FIFO_SIZE] = pm->fifo_size;
+ options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = pm->private_segment_count;
+ options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] =
+ pm->prealloc_fifos ? pm->prealloc_fifos : 1;
+
+ options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN
+ | APP_OPTIONS_FLAGS_IS_PROXY;
+
+ a->options = options;
+
+ if (vnet_application_attach (a))
+ return -1;
+
+ pm->active_open_app_index = a->app_index;
+
+ return 0;
+}
+
+static int
+proxy_server_listen ()
+{
+ proxy_main_t *pm = &proxy_main;
+ vnet_bind_args_t _a, *a = &_a;
+ memset (a, 0, sizeof (*a));
+ a->app_index = pm->server_app_index;
+ a->uri = (char *) pm->server_uri;
+ return vnet_bind_uri (a);
+}
+
+static int
+proxy_server_create (vlib_main_t * vm)
+{
+ proxy_main_t *pm = &proxy_main;
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ u32 num_threads;
+ int i;
+
+ if (pm->server_client_index == (u32) ~ 0)
+ create_api_loopbacks (vm);
+
+ num_threads = 1 /* main thread */ + vtm->n_threads;
+ vec_validate (proxy_main.server_event_queue, num_threads - 1);
+ vec_validate (proxy_main.active_open_event_queue, num_threads - 1);
+ vec_validate (pm->rx_buf, num_threads - 1);
+
+ for (i = 0; i < num_threads; i++)
+ vec_validate (pm->rx_buf[i], pm->rcv_buffer_size);
+
+ if (proxy_server_attach ())
+ {
+ clib_warning ("failed to attach server app");
+ return -1;
+ }
+ if (proxy_server_listen ())
+ {
+ clib_warning ("failed to start listening");
+ return -1;
+ }
+ if (active_open_attach ())
+ {
+ clib_warning ("failed to attach active open app");
+ return -1;
+ }
+
+ for (i = 0; i < num_threads; i++)
+ {
+ pm->active_open_event_queue[i] =
+ session_manager_get_vpp_event_queue (i);
+
+ ASSERT (pm->active_open_event_queue[i]);
+
+ pm->server_event_queue[i] = session_manager_get_vpp_event_queue (i);
+ }
+
+ return 0;
+}
+
+static clib_error_t *
+proxy_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ proxy_main_t *pm = &proxy_main;
+ char *default_server_uri = "tcp://0.0.0.0/23";
+ char *default_client_uri = "tcp://6.0.2.2/23";
+ int rv;
+ u64 tmp;
+
+ pm->fifo_size = 64 << 10;
+ pm->rcv_buffer_size = 1024;
+ pm->prealloc_fifos = 0;
+ pm->private_segment_count = 0;
+ pm->private_segment_size = 0;
+ pm->server_uri = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "fifo-size %d", &pm->fifo_size))
+ pm->fifo_size <<= 10;
+ else if (unformat (input, "rcv-buf-size %d", &pm->rcv_buffer_size))
+ ;
+ else if (unformat (input, "prealloc-fifos %d", &pm->prealloc_fifos))
+ ;
+ else if (unformat (input, "private-segment-count %d",
+ &pm->private_segment_count))
+ ;
+ else if (unformat (input, "private-segment-size %U",
+ unformat_memory_size, &tmp))
+ {
+ if (tmp >= 0x100000000ULL)
+ return clib_error_return
+ (0, "private segment size %lld (%llu) too large", tmp, tmp);
+ pm->private_segment_size = tmp;
+ }
+ else if (unformat (input, "server-uri %s", &pm->server_uri))
+ ;
+ else if (unformat (input, "client-uri %s", &pm->client_uri))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ if (!pm->server_uri)
+ {
+ clib_warning ("No server-uri provided, Using default: %s",
+ default_server_uri);
+ pm->server_uri = format (0, "%s%c", default_server_uri, 0);
+ }
+ if (!pm->client_uri)
+ {
+ clib_warning ("No client-uri provided, Using default: %s",
+ default_client_uri);
+ pm->client_uri = format (0, "%s%c", default_client_uri, 0);
+ }
+
+ vnet_session_enable_disable (vm, 1 /* turn on session and transport */ );
+
+ rv = proxy_server_create (vm);
+ switch (rv)
+ {
+ case 0:
+ break;
+ default:
+ return clib_error_return (0, "server_create returned %d", rv);
+ }
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (proxy_create_command, static) =
+{
+ .path = "test proxy server",
+ .short_help = "test proxy server [server-uri <tcp://ip/port>]"
+ "[client-uri <tcp://ip/port>][fifo-size <nn>][rcv-buf-size <nn>]"
+ "[prealloc-fifos <nn>][private-segment-size <mem>]"
+ "[private-segment-count <nn>]",
+ .function = proxy_server_create_command_fn,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+proxy_main_init (vlib_main_t * vm)
+{
+ proxy_main_t *pm = &proxy_main;
+ pm->server_client_index = ~0;
+ pm->active_open_client_index = ~0;
+ pm->proxy_session_by_active_open_handle = hash_create (0, sizeof (uword));
+ pm->proxy_session_by_server_handle = hash_create (0, sizeof (uword));
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (proxy_main_init);
+
+/*
+* fd.io coding-style-patch-verification: ON
+*
+* Local Variables:
+* eval: (c-set-style "gnu")
+* End:
+*/
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