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/*
* 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>
typedef struct
{
/*
* Server app parameters
*/
svm_queue_t **vpp_queue;
svm_queue_t *vl_input_queue; /**< Sever's event queue */
u32 app_index; /**< Server app index */
u32 my_client_index; /**< API client handle */
u32 node_index; /**< process node index for evnt scheduling */
/*
* Config params
*/
u8 no_echo; /**< Don't echo traffic */
u32 fifo_size; /**< Fifo size */
u32 rcv_buffer_size; /**< Rcv buffer size */
u32 prealloc_fifos; /**< Preallocate fifos */
u32 private_segment_count; /**< Number of private segments */
u32 private_segment_size; /**< Size of private segments */
char *server_uri; /**< Server URI */
/*
* Test state
*/
u8 **rx_buf; /**< Per-thread RX buffer */
u64 byte_index;
u32 **rx_retries;
vlib_main_t *vlib_main;
} echo_server_main_t;
echo_server_main_t echo_server_main;
int
echo_server_session_accept_callback (stream_session_t * s)
{
echo_server_main_t *esm = &echo_server_main;
esm->vpp_queue[s->thread_index] =
session_manager_get_vpp_event_queue (s->thread_index);
s->session_state = SESSION_STATE_READY;
esm->byte_index = 0;
vec_validate (esm->rx_retries[s->thread_index], s->session_index);
esm->rx_retries[s->thread_index][s->session_index] = 0;
return 0;
}
void
echo_server_session_disconnect_callback (stream_session_t * s)
{
echo_server_main_t *esm = &echo_server_main;
vnet_disconnect_args_t _a, *a = &_a;
a->handle = session_handle (s);
a->app_index = esm->app_index;
vnet_disconnect_session (a);
}
void
echo_server_session_reset_callback (stream_session_t * s)
{
clib_warning ("Reset session %U", format_stream_session, s, 2);
stream_session_cleanup (s);
}
int
echo_server_session_connected_callback (u32 app_index, u32 api_context,
stream_session_t * s, u8 is_fail)
{
clib_warning ("called...");
return -1;
}
int
echo_server_add_segment_callback (u32 client_index, const ssvm_private_t * sp)
{
clib_warning ("called...");
return -1;
}
int
echo_server_redirect_connect_callback (u32 client_index, void *mp)
{
clib_warning ("called...");
return -1;
}
void
test_bytes (echo_server_main_t * esm, int actual_transfer)
{
int i;
u32 my_thread_id = vlib_get_thread_index ();
for (i = 0; i < actual_transfer; i++)
{
if (esm->rx_buf[my_thread_id][i] != ((esm->byte_index + i) & 0xff))
{
clib_warning ("at %lld expected %d got %d", esm->byte_index + i,
(esm->byte_index + i) & 0xff,
esm->rx_buf[my_thread_id][i]);
}
}
esm->byte_index += actual_transfer;
}
/*
* If no-echo, just read the data and be done with it
*/
int
echo_server_builtin_server_rx_callback_no_echo (stream_session_t * s)
{
echo_server_main_t *esm = &echo_server_main;
u32 my_thread_id = vlib_get_thread_index ();
int actual_transfer;
svm_fifo_t *rx_fifo;
rx_fifo = s->server_rx_fifo;
do
{
actual_transfer =
svm_fifo_dequeue_nowait (rx_fifo, esm->rcv_buffer_size,
esm->rx_buf[my_thread_id]);
}
while (actual_transfer > 0);
return 0;
}
int
echo_server_rx_callback (stream_session_t * s)
{
u32 n_written, max_dequeue, max_enqueue, max_transfer;
int actual_transfer;
svm_fifo_t *tx_fifo, *rx_fifo;
echo_server_main_t *esm = &echo_server_main;
session_fifo_event_t evt;
u32 thread_index = vlib_get_thread_index ();
ASSERT (s->thread_index == thread_index);
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);
max_enqueue = svm_fifo_max_enqueue (s->server_tx_fifo);
if (PREDICT_FALSE (max_dequeue == 0))
return 0;
/* Number of bytes we're going to copy */
max_transfer = (max_dequeue < max_enqueue) ? max_dequeue : max_enqueue;
/* No space in tx fifo */
if (PREDICT_FALSE (max_transfer == 0))
{
/* XXX timeout for session that are stuck */
rx_event:
/* Program self-tap to retry */
if (svm_fifo_set_event (rx_fifo))
{
svm_queue_t *q;
evt.fifo = rx_fifo;
evt.event_type = FIFO_EVENT_BUILTIN_RX;
q = esm->vpp_queue[thread_index];
if (PREDICT_FALSE (q->cursize == q->maxsize))
clib_warning ("out of event queue space");
else if (svm_queue_add (q, (u8 *) & evt, 0))
clib_warning ("failed to enqueue self-tap");
if (esm->rx_retries[thread_index][s->session_index] == 500000)
{
clib_warning ("session stuck: %U", format_stream_session, s, 2);
}
if (esm->rx_retries[thread_index][s->session_index] < 500001)
esm->rx_retries[thread_index][s->session_index]++;
}
return 0;
}
_vec_len (esm->rx_buf[thread_index]) = max_transfer;
actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, max_transfer,
esm->rx_buf[thread_index]);
ASSERT (actual_transfer == max_transfer);
// test_bytes (esm, actual_transfer);
/*
* Echo back
*/
n_written = svm_fifo_enqueue_nowait (tx_fifo, actual_transfer,
esm->rx_buf[thread_index]);
if (n_written != max_transfer)
clib_warning ("short trout!");
if (svm_fifo_set_event (tx_fifo))
{
/* Fabricate TX event, send to vpp */
evt.fifo = tx_fifo;
evt.event_type = FIFO_EVENT_APP_TX;
if (svm_queue_add (esm->vpp_queue[s->thread_index],
(u8 *) & evt, 0 /* do wait for mutex */ ))
clib_warning ("failed to enqueue tx evt");
}
if (PREDICT_FALSE (n_written < max_dequeue))
goto rx_event;
return 0;
}
static session_cb_vft_t echo_server_session_cb_vft = {
.session_accept_callback = echo_server_session_accept_callback,
.session_disconnect_callback = echo_server_session_disconnect_callback,
.session_connected_callback = echo_server_session_connected_callback,
.add_segment_callback = echo_server_add_segment_callback,
.redirect_connect_callback = echo_server_redirect_connect_callback,
.builtin_server_rx_callback = echo_server_rx_callback,
.session_reset_callback = echo_server_session_reset_callback
};
/* Abuse VPP's input queue */
static int
create_api_loopback (vlib_main_t * vm)
{
echo_server_main_t *esm = &echo_server_main;
api_main_t *am = &api_main;
vl_shmem_hdr_t *shmem_hdr;
shmem_hdr = am->shmem_hdr;
esm->vl_input_queue = shmem_hdr->vl_input_queue;
esm->my_client_index = vl_api_memclnt_create_internal ("echo_server",
esm->vl_input_queue);
return 0;
}
static int
echo_server_attach (u8 * appns_id, u64 appns_flags, u64 appns_secret)
{
echo_server_main_t *esm = &echo_server_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 (esm->no_echo)
echo_server_session_cb_vft.builtin_server_rx_callback =
echo_server_builtin_server_rx_callback_no_echo;
else
echo_server_session_cb_vft.builtin_server_rx_callback =
echo_server_rx_callback;
if (esm->private_segment_size)
segment_size = esm->private_segment_size;
a->api_client_index = esm->my_client_index;
a->session_cb_vft = &echo_server_session_cb_vft;
a->options = options;
a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size;
a->options[APP_OPTIONS_RX_FIFO_SIZE] = esm->fifo_size;
a->options[APP_OPTIONS_TX_FIFO_SIZE] = esm->fifo_size;
a->options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = esm->private_segment_count;
a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] =
esm->prealloc_fifos ? esm->prealloc_fifos : 1;
a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
if (appns_id)
{
a->namespace_id = appns_id;
a->options[APP_OPTIONS_FLAGS] |= appns_flags;
a->options[APP_OPTIONS_NAMESPACE_SECRET] = appns_secret;
}
if (vnet_application_attach (a))
{
clib_warning ("failed to attach server");
return -1;
}
esm->app_index = a->app_index;
return 0;
}
static int
echo_server_detach (void)
{
echo_server_main_t *esm = &echo_server_main;
vnet_app_detach_args_t _da, *da = &_da;
int rv;
da->app_index = esm->app_index;
rv = vnet_application_detach (da);
esm->app_index = ~0;
return rv;
}
static int
echo_server_listen ()
{
echo_server_main_t *esm = &echo_server_main;
vnet_bind_args_t _a, *a = &_a;
memset (a, 0, sizeof (*a));
a->app_index = esm->app_index;
a->uri = esm->server_uri;
return vnet_bind_uri (a);
}
static int
echo_server_create (vlib_main_t * vm, u8 * appns_id, u64 appns_flags,
u64 appns_secret)
{
echo_server_main_t *esm = &echo_server_main;
vlib_thread_main_t *vtm = vlib_get_thread_main ();
u32 num_threads;
int i;
if (esm->my_client_index == (u32) ~ 0)
{
if (create_api_loopback (vm))
{
clib_warning ("failed to create api loopback");
return -1;
}
}
num_threads = 1 /* main thread */ + vtm->n_threads;
vec_validate (echo_server_main.vpp_queue, num_threads - 1);
vec_validate (esm->rx_buf, num_threads - 1);
vec_validate (esm->rx_retries, num_threads - 1);
for (i = 0; i < num_threads; i++)
vec_validate (esm->rx_buf[i], esm->rcv_buffer_size);
if (echo_server_attach (appns_id, appns_flags, appns_secret))
{
clib_warning ("failed to attach server");
return -1;
}
if (echo_server_listen ())
{
clib_warning ("failed to start listening");
if (echo_server_detach ())
clib_warning ("failed to detach");
return -1;
}
return 0;
}
static clib_error_t *
echo_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
vlib_cli_command_t * cmd)
{
echo_server_main_t *esm = &echo_server_main;
u8 server_uri_set = 0, *appns_id = 0;
u64 tmp, appns_flags = 0, appns_secret = 0;
char *default_uri = "tcp://0.0.0.0/1234";
int rv;
esm->no_echo = 0;
esm->fifo_size = 64 << 10;
esm->rcv_buffer_size = 128 << 10;
esm->prealloc_fifos = 0;
esm->private_segment_count = 0;
esm->private_segment_size = 0;
vec_free (esm->server_uri);
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "uri %s", &esm->server_uri))
server_uri_set = 1;
else if (unformat (input, "no-echo"))
esm->no_echo = 1;
else if (unformat (input, "fifo-size %d", &esm->fifo_size))
esm->fifo_size <<= 10;
else if (unformat (input, "rcv-buf-size %d", &esm->rcv_buffer_size))
;
else if (unformat (input, "prealloc-fifos %d", &esm->prealloc_fifos))
;
else if (unformat (input, "private-segment-count %d",
&esm->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);
esm->private_segment_size = tmp;
}
else if (unformat (input, "appns %_%v%_", &appns_id))
;
else if (unformat (input, "all-scope"))
appns_flags |= (APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE
| APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE);
else if (unformat (input, "local-scope"))
appns_flags |= APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE;
else if (unformat (input, "global-scope"))
appns_flags |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
else if (unformat (input, "secret %lu", &appns_secret))
;
else
return clib_error_return (0, "failed: unknown input `%U'",
format_unformat_error, input);
}
vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ );
if (!server_uri_set)
{
clib_warning ("No uri provided! Using default: %s", default_uri);
esm->server_uri = (char *) format (0, "%s%c", default_uri, 0);
}
rv = echo_server_create (vm, appns_id, appns_flags, appns_secret);
vec_free (appns_id);
if (rv)
{
vec_free (esm->server_uri);
return clib_error_return (0, "failed: server_create returned %d", rv);
}
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (echo_server_create_command, static) =
{
.path = "test echo server",
.short_help = "test echo server proto <proto> [no echo][fifo-size <mbytes>]"
"[rcv-buf-size <bytes>][prealloc-fifos <count>]"
"[private-segment-count <count>][private-segment-size <bytes[m|g]>]"
"[uri <tcp://ip/port>]",
.function = echo_server_create_command_fn,
};
/* *INDENT-ON* */
clib_error_t *
echo_server_main_init (vlib_main_t * vm)
{
echo_server_main_t *esm = &echo_server_main;
esm->my_client_index = ~0;
return 0;
}
VLIB_INIT_FUNCTION (echo_server_main_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/