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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>
/* define message IDs */
#include <vpp/api/vpe_msg_enum.h>
/* define message structures */
#define vl_typedefs
#include <vpp/api/vpe_all_api_h.h>
#undef vl_typedefs
/* define generated endian-swappers */
#define vl_endianfun
#include <vpp/api/vpe_all_api_h.h>
#undef vl_endianfun
/* instantiate all the print functions we know about */
#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
#define vl_printfun
#include <vpp/api/vpe_all_api_h.h>
#undef vl_printfun
typedef enum
{
EVENT_WAKEUP = 1,
} http_process_event_t;
typedef struct
{
u8 *rx_buf;
unix_shared_memory_queue_t **vpp_queue;
u64 byte_index;
uword *handler_by_get_request;
u32 *free_http_cli_process_node_indices;
/* Sever's event queue */
unix_shared_memory_queue_t *vl_input_queue;
/* API client handle */
u32 my_client_index;
u32 app_index;
/* process node index for evnt scheduling */
u32 node_index;
vlib_main_t *vlib_main;
} http_server_main_t;
http_server_main_t http_server_main;
static void
free_http_process (stream_session_t * s)
{
vlib_node_runtime_t *rt;
vlib_main_t *vm = &vlib_global_main;
http_server_main_t *hsm = &http_server_main;
vlib_node_t *n;
u32 node_index;
stream_session_t **save_s;
node_index = (u64) (s->opaque[0]);
ASSERT (node_index != 0);
n = vlib_get_node (vm, node_index);
rt = vlib_node_get_runtime (vm, n->runtime_index);
save_s = (stream_session_t **) vlib_node_get_runtime (vm, n->runtime_index);
/* Reset session saved node index */
s->opaque[0] = 0;
/* Reset process session pointer */
*save_s = 0;
/* Turn off the process node */
vlib_node_set_state (vm, rt->node_index, VLIB_NODE_STATE_DISABLED);
/* add node index to the freelist */
vec_add1 (hsm->free_http_cli_process_node_indices, node_index);
}
static const char
*http_response = "HTTP/1.1 200 OK\r\n"
"Content-Type: text/html\r\n"
"Expires: Mon, 11 Jan 1970 10:10:10 GMT\r\n"
"Connection: close\r\n"
"Pragma: no-cache\r\n" "Content-Length: %d\r\n\r\n%s";
static const char
*http_error_template = "HTTP/1.1 %s\r\n"
"Content-Type: text/html\r\n"
"Expires: Mon, 11 Jan 1970 10:10:10 GMT\r\n"
"Connection: close\r\n" "Pragma: no-cache\r\n" "Content-Length: 0\r\n\r\n";
/* Header, including incantation to suppress favicon.ico requests */
static const char
*html_header_template = "<html><head><title>%v</title>"
"</head><link rel=\"icon\" href=\"data:,\"><body><pre>";
static const char *html_footer = "</pre></body></html>\r\n";
static void
http_cli_output (uword arg, u8 * buffer, uword buffer_bytes)
{
u8 **output_vecp = (u8 **) arg;
u8 *output_vec;
u32 offset;
output_vec = *output_vecp;
offset = vec_len (output_vec);
vec_validate (output_vec, offset + buffer_bytes - 1);
clib_memcpy (output_vec + offset, buffer, buffer_bytes);
*output_vecp = output_vec;
}
void
send_data (stream_session_t * s, u8 * data)
{
session_fifo_event_t evt;
u32 offset, bytes_to_send;
f64 delay = 10e-3;
http_server_main_t *hsm = &http_server_main;
vlib_main_t *vm = hsm->vlib_main;
f64 last_sent_timer = vlib_time_now (vm);
bytes_to_send = vec_len (data);
offset = 0;
while (bytes_to_send > 0)
{
int actual_transfer;
actual_transfer = svm_fifo_enqueue_nowait
(s->server_tx_fifo, bytes_to_send, data + offset);
/* Made any progress? */
if (actual_transfer <= 0)
{
vlib_process_suspend (vm, delay);
/* 10s deadman timer */
if (vlib_time_now (vm) > last_sent_timer + 10.0)
{
/* $$$$ FC: reset transport session here? */
break;
}
/* Exponential backoff, within reason */
if (delay < 1.0)
delay = delay * 2.0;
}
else
{
last_sent_timer = vlib_time_now (vm);
offset += actual_transfer;
bytes_to_send -= actual_transfer;
if (svm_fifo_set_event (s->server_tx_fifo))
{
/* Fabricate TX event, send to vpp */
evt.fifo = s->server_tx_fifo;
evt.event_type = FIFO_EVENT_APP_TX;
evt.event_id = 0;
unix_shared_memory_queue_add (hsm->vpp_queue[s->thread_index],
(u8 *) & evt,
0 /* do wait for mutex */ );
}
delay = 10e-3;
}
}
}
static void
send_error (stream_session_t * s, char *str)
{
u8 *data;
data = format (0, http_error_template, str);
send_data (s, data);
vec_free (data);
}
static uword
http_cli_process (vlib_main_t * vm,
vlib_node_runtime_t * rt, vlib_frame_t * f)
{
http_server_main_t *hsm = &http_server_main;
u8 *request = 0, *reply = 0;
stream_session_t **save_s;
stream_session_t *s;
unformat_input_t input;
int i;
u8 *http = 0, *html = 0;
save_s = vlib_node_get_runtime_data (hsm->vlib_main, rt->node_index);
s = *save_s;
request = (u8 *) (void *) (s->opaque[1]);
s->opaque[1] = 0;
if (vec_len (request) < 7)
{
send_error (s, "400 Bad Request");
goto out;
}
for (i = 0; i < vec_len (request) - 4; i++)
{
if (request[i] == 'G' &&
request[i + 1] == 'E' &&
request[i + 2] == 'T' && request[i + 3] == ' ')
goto found;
}
bad_request:
send_error (s, "400 Bad Request");
goto out;
found:
/* Lose "GET " */
vec_delete (request, i + 5, 0);
/* Replace slashes with spaces, stop at the end of the path */
i = 0;
while (1)
{
if (request[i] == '/')
request[i] = ' ';
else if (request[i] == ' ')
{
/* vlib_cli_input is vector-based, no need for a NULL */
_vec_len (request) = i;
break;
}
i++;
/* Should never happen */
if (i == vec_len (request))
goto bad_request;
}
/* Generate the html header */
html = format (0, html_header_template, request /* title */ );
/* Run the command */
unformat_init_vector (&input, request);
vlib_cli_input (vm, &input, http_cli_output, (uword) & reply);
unformat_free (&input);
request = 0;
/* Generate the html page */
html = format (html, "%v", reply);
html = format (html, html_footer);
/* And the http reply */
http = format (0, http_response, vec_len (html), html);
/* Send it */
send_data (s, http);
out:
/* Cleanup */
vec_free (request);
vec_free (reply);
vec_free (html);
vec_free (http);
free_http_process (s);
return (0);
}
static void
alloc_http_process (stream_session_t * s)
{
char *name;
vlib_node_t *n;
http_server_main_t *hsm = &http_server_main;
vlib_main_t *vm = hsm->vlib_main;
uword l = vec_len (hsm->free_http_cli_process_node_indices);
stream_session_t **save_s;
if (vec_len (hsm->free_http_cli_process_node_indices) > 0)
{
n = vlib_get_node (vm, hsm->free_http_cli_process_node_indices[l - 1]);
vlib_node_set_state (vm, n->index, VLIB_NODE_STATE_POLLING);
_vec_len (hsm->free_http_cli_process_node_indices) = l - 1;
}
else
{
static vlib_node_registration_t r = {
.function = http_cli_process,
.type = VLIB_NODE_TYPE_PROCESS,
.process_log2_n_stack_bytes = 16,
.runtime_data_bytes = sizeof (void *),
};
name = (char *) format (0, "http-cli-%d", l);
r.name = name;
vlib_register_node (vm, &r);
vec_free (name);
n = vlib_get_node (vm, r.index);
}
/* Save the node index in the stream_session_t. It won't be zero. */
s->opaque[0] = (u64) n->index;
/* Save the stream_session_t (pointer) in the node runtime */
save_s = vlib_node_get_runtime_data (vm, n->index);
*save_s = s;
vlib_start_process (vm, n->runtime_index);
}
static int
builtin_session_accept_callback (stream_session_t * s)
{
http_server_main_t *bsm = &http_server_main;
bsm->vpp_queue[s->thread_index] =
session_manager_get_vpp_event_queue (s->thread_index);
s->session_state = SESSION_STATE_READY;
bsm->byte_index = 0;
return 0;
}
static void
builtin_session_disconnect_callback (stream_session_t * s)
{
http_server_main_t *bsm = &http_server_main;
vnet_disconnect_args_t _a, *a = &_a;
a->handle = stream_session_handle (s);
a->app_index = bsm->app_index;
vnet_disconnect_session (a);
}
static void
builtin_session_reset_callback (stream_session_t * s)
{
clib_warning ("called.. ");
stream_session_cleanup (s);
}
static int
builtin_session_connected_callback (u32 app_index, u32 api_context,
stream_session_t * s, u8 is_fail)
{
clib_warning ("called...");
return -1;
}
static int
builtin_add_segment_callback (u32 client_index,
const u8 * seg_name, u32 seg_size)
{
clib_warning ("called...");
return -1;
}
static int
builtin_redirect_connect_callback (u32 client_index, void *mp)
{
clib_warning ("called...");
return -1;
}
static void
alloc_http_process_callback (void *s_arg)
{
stream_session_t *s = (stream_session_t *) s_arg;
alloc_http_process (s);
}
static int
http_server_rx_callback (stream_session_t * s)
{
u32 max_dequeue;
int actual_transfer;
http_server_main_t *hsm = &http_server_main;
svm_fifo_t *rx_fifo;
rx_fifo = s->server_rx_fifo;
max_dequeue = svm_fifo_max_dequeue (rx_fifo);
svm_fifo_unset_event (rx_fifo);
if (PREDICT_FALSE (max_dequeue == 0))
return 0;
vec_validate (hsm->rx_buf, max_dequeue - 1);
_vec_len (hsm->rx_buf) = max_dequeue;
actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, max_dequeue,
hsm->rx_buf);
ASSERT (actual_transfer > 0);
_vec_len (hsm->rx_buf) = actual_transfer;
/* send the command to a new/recycled vlib process */
s->opaque[1] = (u64) vec_dup (hsm->rx_buf);
/* Send an RPC request via the thread-0 input node */
if (vlib_get_thread_index () != 0)
{
session_fifo_event_t evt;
evt.rpc_args.fp = alloc_http_process_callback;
evt.rpc_args.arg = s;
evt.event_type = FIFO_EVENT_RPC;
unix_shared_memory_queue_add
(session_manager_get_vpp_event_queue (0 /* main thread */ ),
(u8 *) & evt, 0 /* do wait for mutex */ );
}
else
alloc_http_process (s);
return 0;
}
static session_cb_vft_t builtin_session_cb_vft = {
.session_accept_callback = builtin_session_accept_callback,
.session_disconnect_callback = builtin_session_disconnect_callback,
.session_connected_callback = builtin_session_connected_callback,
.add_segment_callback = builtin_add_segment_callback,
.redirect_connect_callback = builtin_redirect_connect_callback,
.builtin_server_rx_callback = http_server_rx_callback,
.session_reset_callback = builtin_session_reset_callback
};
/* Abuse VPP's input queue */
static int
create_api_loopback (vlib_main_t * vm)
{
http_server_main_t *hsm = &http_server_main;
vl_api_memclnt_create_t _m, *mp = &_m;
extern void vl_api_memclnt_create_t_handler (vl_api_memclnt_create_t *);
api_main_t *am = &api_main;
vl_shmem_hdr_t *shmem_hdr;
uword *event_data = 0, event_type;
int resolved = 0;
/*
* Create a "loopback" API client connection
* Don't do things like this unless you know what you're doing...
*/
shmem_hdr = am->shmem_hdr;
hsm->vl_input_queue = shmem_hdr->vl_input_queue;
memset (mp, 0, sizeof (*mp));
mp->_vl_msg_id = VL_API_MEMCLNT_CREATE;
mp->context = 0xFEEDFACE;
mp->input_queue = (u64) hsm->vl_input_queue;
strncpy ((char *) mp->name, "tcp_http_server", sizeof (mp->name) - 1);
vl_api_memclnt_create_t_handler (mp);
/* Wait for reply */
hsm->node_index = vlib_get_current_process (vm)->node_runtime.node_index;
vlib_process_wait_for_event_or_clock (vm, 1.0);
event_type = vlib_process_get_events (vm, &event_data);
switch (event_type)
{
case 1:
resolved = 1;
break;
case ~0:
/* timed out */
break;
default:
clib_warning ("unknown event_type %d", event_type);
}
if (!resolved)
return -1;
return 0;
}
static int
server_attach ()
{
http_server_main_t *hsm = &http_server_main;
u8 segment_name[128];
u64 options[SESSION_OPTIONS_N_OPTIONS];
vnet_app_attach_args_t _a, *a = &_a;
memset (a, 0, sizeof (*a));
memset (options, 0, sizeof (options));
a->api_client_index = hsm->my_client_index;
a->session_cb_vft = &builtin_session_cb_vft;
a->options = options;
a->options[SESSION_OPTIONS_SEGMENT_SIZE] = 128 << 20;
a->options[SESSION_OPTIONS_RX_FIFO_SIZE] = 8 << 10;
a->options[SESSION_OPTIONS_TX_FIFO_SIZE] = 32 << 10;
a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP;
a->segment_name = segment_name;
a->segment_name_length = ARRAY_LEN (segment_name);
if (vnet_application_attach (a))
{
clib_warning ("failed to attach server");
return -1;
}
hsm->app_index = a->app_index;
return 0;
}
static int
server_listen ()
{
http_server_main_t *hsm = &http_server_main;
vnet_bind_args_t _a, *a = &_a;
memset (a, 0, sizeof (*a));
a->app_index = hsm->app_index;
a->uri = "tcp://0.0.0.0/80";
return vnet_bind_uri (a);
}
static int
server_create (vlib_main_t * vm)
{
http_server_main_t *hsm = &http_server_main;
u32 num_threads;
vlib_thread_main_t *vtm = vlib_get_thread_main ();
if (hsm->my_client_index == (u32) ~ 0)
{
if (create_api_loopback (vm))
return -1;
}
num_threads = 1 /* main thread */ + vtm->n_threads;
vec_validate (http_server_main.vpp_queue, num_threads - 1);
if (server_attach ())
{
clib_warning ("failed to attach server");
return -1;
}
if (server_listen ())
{
clib_warning ("failed to start listening");
return -1;
}
return 0;
}
/* Get our api client index */
static void
vl_api_memclnt_create_reply_t_handler (vl_api_memclnt_create_reply_t * mp)
{
vlib_main_t *vm = vlib_get_main ();
http_server_main_t *hsm = &http_server_main;
hsm->my_client_index = mp->index;
vlib_process_signal_event (vm, hsm->node_index, 1 /* evt */ ,
0 /* data */ );
}
#define foreach_tcp_http_server_api_msg \
_(MEMCLNT_CREATE_REPLY, memclnt_create_reply) \
static clib_error_t *
tcp_http_server_api_hookup (vlib_main_t * vm)
{
vl_msg_api_msg_config_t _c, *c = &_c;
/* Hook up client-side static APIs to our handlers */
#define _(N,n) do { \
c->id = VL_API_##N; \
c->name = #n; \
c->handler = vl_api_##n##_t_handler; \
c->cleanup = vl_noop_handler; \
c->endian = vl_api_##n##_t_endian; \
c->print = vl_api_##n##_t_print; \
c->size = sizeof(vl_api_##n##_t); \
c->traced = 1; /* trace, so these msgs print */ \
c->replay = 0; /* don't replay client create/delete msgs */ \
c->message_bounce = 0; /* don't bounce this message */ \
vl_msg_api_config(c);} while (0);
foreach_tcp_http_server_api_msg;
#undef _
return 0;
}
static clib_error_t *
server_create_command_fn (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
int rv;
tcp_http_server_api_hookup (vm);
vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ );
rv = 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 (server_create_command, static) =
{
.path = "test http server",
.short_help = "test http server",
.function = server_create_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
builtin_http_server_main_init (vlib_main_t * vm)
{
http_server_main_t *hsm = &http_server_main;
hsm->my_client_index = ~0;
hsm->vlib_main = vm;
return 0;
}
VLIB_INIT_FUNCTION (builtin_http_server_main_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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