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|
/*
*------------------------------------------------------------------
* api_shared.c - API message handling, common code for both clients
* and the vlib process itself.
*
*
* Copyright (c) 2009 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 <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <vppinfra/format.h>
#include <vppinfra/byte_order.h>
#include <vppinfra/error.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlibapi/api.h>
#include <vppinfra/elog.h>
#include <vppinfra/callback.h>
/* *INDENT-OFF* */
api_main_t api_global_main =
{
.region_name = "/unset",
.api_uid = -1,
.api_gid = -1,
};
/* *INDENT-ON* */
/* Please use vlibapi_get_main() to access my_api_main */
__thread api_main_t *my_api_main = &api_global_main;
void
vl_msg_api_set_global_main (void *am_arg)
{
ASSERT (am_arg);
my_api_main = (api_main_t *) am_arg;
}
void
vl_msg_api_increment_missing_client_counter (void)
{
api_main_t *am = vlibapi_get_main ();
am->missing_clients++;
}
int
vl_msg_api_rx_trace_enabled (api_main_t * am)
{
return (am->rx_trace && am->rx_trace->enabled);
}
int
vl_msg_api_tx_trace_enabled (api_main_t * am)
{
return (am->tx_trace && am->tx_trace->enabled);
}
/*
* vl_msg_api_trace
*/
void
vl_msg_api_trace (api_main_t * am, vl_api_trace_t * tp, void *msg)
{
u8 **this_trace;
u8 **old_trace;
u8 *msg_copy;
u32 length;
trace_cfg_t *cfgp;
u16 msg_id = clib_net_to_host_u16 (*((u16 *) msg));
msgbuf_t *header = (msgbuf_t *) (((u8 *) msg) - offsetof (msgbuf_t, data));
cfgp = am->api_trace_cfg + msg_id;
if (!cfgp || !cfgp->trace_enable)
return;
msg_copy = 0;
if (tp->nitems == 0)
{
clib_warning ("tp->nitems is 0");
return;
}
if (vec_len (tp->traces) < tp->nitems)
{
vec_add1 (tp->traces, 0);
this_trace = tp->traces + vec_len (tp->traces) - 1;
}
else
{
tp->wrapped = 1;
old_trace = tp->traces + tp->curindex++;
if (tp->curindex == tp->nitems)
tp->curindex = 0;
/* Reuse the trace record, may save some memory allocator traffic */
msg_copy = *old_trace;
vec_reset_length (msg_copy);
this_trace = old_trace;
}
length = clib_net_to_host_u32 (header->data_len);
vec_validate (msg_copy, length - 1);
clib_memcpy_fast (msg_copy, msg, length);
*this_trace = msg_copy;
}
int
vl_msg_api_trace_onoff (api_main_t * am, vl_api_trace_which_t which,
int onoff)
{
vl_api_trace_t *tp;
int rv;
switch (which)
{
case VL_API_TRACE_TX:
tp = am->tx_trace;
if (tp == 0)
{
vl_msg_api_trace_configure (am, which, 1024);
tp = am->tx_trace;
}
break;
case VL_API_TRACE_RX:
tp = am->rx_trace;
if (tp == 0)
{
vl_msg_api_trace_configure (am, which, 1024);
tp = am->rx_trace;
}
break;
default:
/* duh? */
return -1;
}
/* Configured? */
if (tp == 0 || tp->nitems == 0)
return -1;
rv = tp->enabled;
tp->enabled = onoff;
return rv;
}
int
vl_msg_api_trace_free (api_main_t * am, vl_api_trace_which_t which)
{
vl_api_trace_t *tp;
int i;
switch (which)
{
case VL_API_TRACE_TX:
tp = am->tx_trace;
break;
case VL_API_TRACE_RX:
tp = am->rx_trace;
break;
default:
/* duh? */
return -1;
}
/* Configured? */
if (!tp || tp->nitems == 0)
return -1;
tp->curindex = 0;
tp->wrapped = 0;
for (i = 0; i < vec_len (tp->traces); i++)
{
vec_free (tp->traces[i]);
}
vec_free (tp->traces);
return 0;
}
u8 *
vl_api_serialize_message_table (api_main_t * am, u8 * vector)
{
serialize_main_t _sm, *sm = &_sm;
hash_pair_t *hp;
u32 nmsg = hash_elts (am->msg_index_by_name_and_crc);
serialize_open_vector (sm, vector);
/* serialize the count */
serialize_integer (sm, nmsg, sizeof (u32));
/* *INDENT-OFF* */
hash_foreach_pair (hp, am->msg_index_by_name_and_crc,
({
serialize_likely_small_unsigned_integer (sm, hp->value[0]);
serialize_cstring (sm, (char *) hp->key);
}));
/* *INDENT-ON* */
return serialize_close_vector (sm);
}
int
vl_msg_api_trace_save (api_main_t * am, vl_api_trace_which_t which, FILE * fp)
{
vl_api_trace_t *tp;
vl_api_trace_file_header_t fh;
int i;
u8 *msg;
switch (which)
{
case VL_API_TRACE_TX:
tp = am->tx_trace;
break;
case VL_API_TRACE_RX:
tp = am->rx_trace;
break;
default:
/* duh? */
return -1;
}
/* Configured, data present? */
if (tp == 0 || tp->nitems == 0 || vec_len (tp->traces) == 0)
return -1;
/* "Dare to be stupid" check */
if (fp == 0)
{
return -2;
}
/* Write the file header */
fh.wrapped = tp->wrapped;
fh.nitems = clib_host_to_net_u32 (vec_len (tp->traces));
u8 *m = vl_api_serialize_message_table (am, 0);
fh.msgtbl_size = clib_host_to_net_u32 (vec_len (m));
if (fwrite (&fh, sizeof (fh), 1, fp) != 1)
{
return (-10);
}
/* Write the message table */
if (fwrite (m, vec_len (m), 1, fp) != 1)
{
return (-14);
}
vec_free (m);
/* No-wrap case */
if (tp->wrapped == 0)
{
/*
* Note: vec_len return 0 when fed a NULL pointer.
* Unfortunately, the static analysis tool doesn't
* figure it out, hence the suppressed warnings.
* What a great use of my time.
*/
for (i = 0; i < vec_len (tp->traces); i++)
{
u32 msg_length;
/*sa_ignore NO_NULL_CHK */
msg = tp->traces[i];
/*
* This retarded check required to pass
* [sic] SA-checking.
*/
if (!msg)
continue;
msg_length = clib_host_to_net_u32 (vec_len (msg));
if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
!= sizeof (msg_length))
{
return (-14);
}
if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
{
return (-11);
}
}
}
else
{
/* Wrap case: write oldest -> end of buffer */
for (i = tp->curindex; i < vec_len (tp->traces); i++)
{
u32 msg_length;
msg = tp->traces[i];
/*
* This retarded check required to pass
* [sic] SA-checking
*/
if (!msg)
continue;
msg_length = clib_host_to_net_u32 (vec_len (msg));
if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
!= sizeof (msg_length))
{
return (-14);
}
if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
{
return (-12);
}
}
/* write beginning of buffer -> oldest-1 */
for (i = 0; i < tp->curindex; i++)
{
u32 msg_length;
/*sa_ignore NO_NULL_CHK */
msg = tp->traces[i];
/*
* This retarded check required to pass
* [sic] SA-checking
*/
if (!msg)
continue;
msg_length = clib_host_to_net_u32 (vec_len (msg));
if (fwrite (&msg_length, 1, sizeof (msg_length), fp)
!= sizeof (msg_length))
{
return (-14);
}
if (fwrite (msg, 1, vec_len (msg), fp) != vec_len (msg))
{
return (-13);
}
}
}
return 0;
}
int
vl_msg_api_trace_configure (api_main_t * am, vl_api_trace_which_t which,
u32 nitems)
{
vl_api_trace_t *tp;
int was_on = 0;
switch (which)
{
case VL_API_TRACE_TX:
tp = am->tx_trace;
if (tp == 0)
{
vec_validate (am->tx_trace, 0);
tp = am->tx_trace;
}
break;
case VL_API_TRACE_RX:
tp = am->rx_trace;
if (tp == 0)
{
vec_validate (am->rx_trace, 0);
tp = am->rx_trace;
}
break;
default:
return -1;
}
if (tp->enabled)
{
was_on = vl_msg_api_trace_onoff (am, which, 0);
}
if (tp->traces)
{
vl_msg_api_trace_free (am, which);
}
clib_memset (tp, 0, sizeof (*tp));
if (clib_arch_is_big_endian)
{
tp->endian = VL_API_BIG_ENDIAN;
}
else
{
tp->endian = VL_API_LITTLE_ENDIAN;
}
tp->nitems = nitems;
if (was_on)
{
(void) vl_msg_api_trace_onoff (am, which, was_on);
}
return 0;
}
void
vl_msg_api_barrier_sync (void)
{
}
void
vl_msg_api_barrier_release (void)
{
}
always_inline void
msg_handler_internal (api_main_t * am,
void *the_msg, int trace_it, int do_it, int free_it)
{
u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
u8 *(*print_fp) (void *, void *);
if (PREDICT_FALSE (am->elog_trace_api_messages))
{
/* *INDENT-OFF* */
ELOG_TYPE_DECLARE (e) =
{
.format = "api-msg: %s",
.format_args = "T4",
};
/* *INDENT-ON* */
struct
{
u32 c;
} *ed;
ed = ELOG_DATA (am->elog_main, e);
if (id < vec_len (am->msg_names))
ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
else
ed->c = elog_string (am->elog_main, "BOGUS");
}
if (id < vec_len (am->msg_handlers) && am->msg_handlers[id])
{
if (trace_it)
vl_msg_api_trace (am, am->rx_trace, the_msg);
if (am->msg_print_flag)
{
fformat (stdout, "[%d]: %s\n", id, am->msg_names[id]);
print_fp = (void *) am->msg_print_handlers[id];
if (print_fp == 0)
{
fformat (stdout, " [no registered print fn]\n");
}
else
{
(*print_fp) (the_msg, stdout);
}
}
if (do_it)
{
if (!am->is_mp_safe[id])
{
vl_msg_api_barrier_trace_context (am->msg_names[id]);
vl_msg_api_barrier_sync ();
}
if (am->is_autoendian[id])
{
void (*endian_fp) (void *);
endian_fp = am->msg_endian_handlers[id];
(*endian_fp) (the_msg);
}
if (PREDICT_FALSE (vec_len (am->perf_counter_cbs) != 0))
clib_call_callbacks (am->perf_counter_cbs, am, id,
0 /* before */ );
(*am->msg_handlers[id]) (the_msg);
if (PREDICT_FALSE (vec_len (am->perf_counter_cbs) != 0))
clib_call_callbacks (am->perf_counter_cbs, am, id,
1 /* after */ );
if (!am->is_mp_safe[id])
vl_msg_api_barrier_release ();
}
}
else
{
clib_warning ("no handler for msg id %d", id);
}
if (free_it)
vl_msg_api_free (the_msg);
if (PREDICT_FALSE (am->elog_trace_api_messages))
{
/* *INDENT-OFF* */
ELOG_TYPE_DECLARE (e) =
{
.format = "api-msg-done(%s): %s",
.format_args = "t4T4",
.n_enum_strings = 2,
.enum_strings =
{
"barrier",
"mp-safe",
}
};
/* *INDENT-ON* */
struct
{
u32 barrier;
u32 c;
} *ed;
ed = ELOG_DATA (am->elog_main, e);
if (id < vec_len (am->msg_names))
{
ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
ed->barrier = !am->is_mp_safe[id];
}
else
{
ed->c = elog_string (am->elog_main, "BOGUS");
ed->barrier = 0;
}
}
}
void (*vl_msg_api_fuzz_hook) (u16, void *);
/* This is only to be called from a vlib/vnet app */
void
vl_msg_api_handler_with_vm_node (api_main_t * am, svm_region_t * vlib_rp,
void *the_msg, vlib_main_t * vm,
vlib_node_runtime_t * node, u8 is_private)
{
u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
u8 *(*handler) (void *, void *, void *);
u8 *(*print_fp) (void *, void *);
svm_region_t *old_vlib_rp;
void *save_shmem_hdr;
int is_mp_safe = 1;
if (PREDICT_FALSE (am->elog_trace_api_messages))
{
/* *INDENT-OFF* */
ELOG_TYPE_DECLARE (e) =
{
.format = "api-msg: %s",
.format_args = "T4",
};
/* *INDENT-ON* */
struct
{
u32 c;
} *ed;
ed = ELOG_DATA (am->elog_main, e);
if (id < vec_len (am->msg_names))
ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
else
ed->c = elog_string (am->elog_main, "BOGUS");
}
if (id < vec_len (am->msg_handlers) && am->msg_handlers[id])
{
handler = (void *) am->msg_handlers[id];
if (PREDICT_FALSE (am->rx_trace && am->rx_trace->enabled))
vl_msg_api_trace (am, am->rx_trace, the_msg);
if (PREDICT_FALSE (am->msg_print_flag))
{
fformat (stdout, "[%d]: %s\n", id, am->msg_names[id]);
print_fp = (void *) am->msg_print_handlers[id];
if (print_fp == 0)
{
fformat (stdout, " [no registered print fn for msg %d]\n", id);
}
else
{
(*print_fp) (the_msg, vm);
}
}
is_mp_safe = am->is_mp_safe[id];
if (!is_mp_safe)
{
vl_msg_api_barrier_trace_context (am->msg_names[id]);
vl_msg_api_barrier_sync ();
}
if (is_private)
{
old_vlib_rp = am->vlib_rp;
save_shmem_hdr = am->shmem_hdr;
am->vlib_rp = vlib_rp;
am->shmem_hdr = (void *) vlib_rp->user_ctx;
}
if (PREDICT_FALSE (vl_msg_api_fuzz_hook != 0))
(*vl_msg_api_fuzz_hook) (id, the_msg);
if (am->is_autoendian[id])
{
void (*endian_fp) (void *);
endian_fp = am->msg_endian_handlers[id];
(*endian_fp) (the_msg);
}
if (PREDICT_FALSE (vec_len (am->perf_counter_cbs) != 0))
clib_call_callbacks (am->perf_counter_cbs, am, id, 0 /* before */ );
(*handler) (the_msg, vm, node);
if (PREDICT_FALSE (vec_len (am->perf_counter_cbs) != 0))
clib_call_callbacks (am->perf_counter_cbs, am, id, 1 /* after */ );
if (is_private)
{
am->vlib_rp = old_vlib_rp;
am->shmem_hdr = save_shmem_hdr;
}
if (!is_mp_safe)
vl_msg_api_barrier_release ();
}
else
{
clib_warning ("no handler for msg id %d", id);
}
/*
* Special-case, so we can e.g. bounce messages off the vnet
* main thread without copying them...
*/
if (id >= vec_len (am->message_bounce) || !(am->message_bounce[id]))
vl_msg_api_free (the_msg);
if (PREDICT_FALSE (am->elog_trace_api_messages))
{
/* *INDENT-OFF* */
ELOG_TYPE_DECLARE (e) =
{
.format = "api-msg-done(%s): %s",
.format_args = "t4T4",
.n_enum_strings = 2,
.enum_strings =
{
"barrier",
"mp-safe",
}
};
/* *INDENT-ON* */
struct
{
u32 barrier;
u32 c;
} *ed;
ed = ELOG_DATA (am->elog_main, e);
if (id < vec_len (am->msg_names))
ed->c = elog_string (am->elog_main, (char *) am->msg_names[id]);
else
ed->c = elog_string (am->elog_main, "BOGUS");
ed->barrier = is_mp_safe;
}
}
void
vl_msg_api_handler (void *the_msg)
{
api_main_t *am = vlibapi_get_main ();
msg_handler_internal (am, the_msg,
(am->rx_trace
&& am->rx_trace->enabled) /* trace_it */ ,
1 /* do_it */ , 1 /* free_it */ );
}
void
vl_msg_api_handler_no_free (void *the_msg)
{
api_main_t *am = vlibapi_get_main ();
msg_handler_internal (am, the_msg,
(am->rx_trace
&& am->rx_trace->enabled) /* trace_it */ ,
1 /* do_it */ , 0 /* free_it */ );
}
void
vl_msg_api_handler_no_trace_no_free (void *the_msg)
{
api_main_t *am = vlibapi_get_main ();
msg_handler_internal (am, the_msg, 0 /* trace_it */ , 1 /* do_it */ ,
0 /* free_it */ );
}
/*
* Add a trace record to the API message trace buffer, if
* API message tracing is enabled. Handy for adding sufficient
* data to the trace to reproduce autonomous state, as opposed to
* state downloaded via control-plane API messages. Example: the NAT
* application creates database entries based on packet traffic, not
* control-plane messages.
*
*/
void
vl_msg_api_trace_only (void *the_msg)
{
api_main_t *am = vlibapi_get_main ();
msg_handler_internal (am, the_msg,
(am->rx_trace
&& am->rx_trace->enabled) /* trace_it */ ,
0 /* do_it */ , 0 /* free_it */ );
}
void
vl_msg_api_cleanup_handler (void *the_msg)
{
api_main_t *am = vlibapi_get_main ();
u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
if (PREDICT_FALSE (id >= vec_len (am->msg_cleanup_handlers)))
{
clib_warning ("_vl_msg_id too large: %d\n", id);
return;
}
if (am->msg_cleanup_handlers[id])
(*am->msg_cleanup_handlers[id]) (the_msg);
vl_msg_api_free (the_msg);
}
/*
* vl_msg_api_replay_handler
*/
void
vl_msg_api_replay_handler (void *the_msg)
{
api_main_t *am = vlibapi_get_main ();
u16 id = clib_net_to_host_u16 (*((u16 *) the_msg));
if (PREDICT_FALSE (id >= vec_len (am->msg_handlers)))
{
clib_warning ("_vl_msg_id too large: %d\n", id);
return;
}
/* do NOT trace the message... */
if (am->msg_handlers[id])
(*am->msg_handlers[id]) (the_msg);
/* do NOT free the message buffer... */
}
u32
vl_msg_api_get_msg_length (void *msg_arg)
{
return vl_msg_api_get_msg_length_inline (msg_arg);
}
/*
* vl_msg_api_socket_handler
*/
void
vl_msg_api_socket_handler (void *the_msg)
{
api_main_t *am = vlibapi_get_main ();
msg_handler_internal (am, the_msg,
(am->rx_trace
&& am->rx_trace->enabled) /* trace_it */ ,
1 /* do_it */ , 0 /* free_it */ );
}
#define foreach_msg_api_vector \
_(msg_names) \
_(msg_handlers) \
_(msg_cleanup_handlers) \
_(msg_endian_handlers) \
_(msg_print_handlers) \
_(api_trace_cfg) \
_(message_bounce) \
_(is_mp_safe) \
_(is_autoendian)
void
vl_msg_api_config (vl_msg_api_msg_config_t * c)
{
api_main_t *am = vlibapi_get_main ();
/*
* This happens during the java core tests if the message
* dictionary is missing newly added xxx_reply_t messages.
* Should never happen, but since I shot myself in the foot once
* this way, I thought I'd make it easy to debug if I ever do
* it again... (;-)...
*/
if (c->id == 0)
{
if (c->name)
clib_warning ("Trying to register %s with a NULL msg id!", c->name);
else
clib_warning ("Trying to register a NULL msg with a NULL msg id!");
clib_warning ("Did you forget to call setup_message_id_table?");
return;
}
#define _(a) vec_validate (am->a, c->id);
foreach_msg_api_vector;
#undef _
if (am->msg_handlers[c->id] && am->msg_handlers[c->id] != c->handler)
clib_warning
("BUG: re-registering 'vl_api_%s_t_handler'."
"Handler was %llx, replaced by %llx",
c->name, am->msg_handlers[c->id], c->handler);
am->msg_names[c->id] = c->name;
am->msg_handlers[c->id] = c->handler;
am->msg_cleanup_handlers[c->id] = c->cleanup;
am->msg_endian_handlers[c->id] = c->endian;
am->msg_print_handlers[c->id] = c->print;
am->message_bounce[c->id] = c->message_bounce;
am->is_mp_safe[c->id] = c->is_mp_safe;
am->is_autoendian[c->id] = c->is_autoendian;
am->api_trace_cfg[c->id].size = c->size;
am->api_trace_cfg[c->id].trace_enable = c->traced;
am->api_trace_cfg[c->id].replay_enable = c->replay;
}
/*
* vl_msg_api_set_handlers
* preserve the old API for a while
*/
void
vl_msg_api_set_handlers (int id, char *name, void *handler, void *cleanup,
void *endian, void *print, int size, int traced)
{
vl_msg_api_msg_config_t cfg;
vl_msg_api_msg_config_t *c = &cfg;
clib_memset (c, 0, sizeof (*c));
c->id = id;
c->name = name;
c->handler = handler;
c->cleanup = cleanup;
c->endian = endian;
c->print = print;
c->traced = traced;
c->replay = 1;
c->message_bounce = 0;
c->is_mp_safe = 0;
c->is_autoendian = 0;
vl_msg_api_config (c);
}
void
vl_msg_api_clean_handlers (int msg_id)
{
vl_msg_api_msg_config_t cfg;
vl_msg_api_msg_config_t *c = &cfg;
clib_memset (c, 0, sizeof (*c));
c->id = msg_id;
vl_msg_api_config (c);
}
void
vl_msg_api_set_cleanup_handler (int msg_id, void *fp)
{
api_main_t *am = vlibapi_get_main ();
ASSERT (msg_id > 0);
vec_validate (am->msg_cleanup_handlers, msg_id);
am->msg_cleanup_handlers[msg_id] = fp;
}
void
vl_msg_api_queue_handler (svm_queue_t * q)
{
uword msg;
while (!svm_queue_sub (q, (u8 *) & msg, SVM_Q_WAIT, 0))
vl_msg_api_handler ((void *) msg);
}
u32
vl_msg_api_max_length (void *mp)
{
msgbuf_t *mb;
u32 data_len = ~0;
/* Work out the maximum sane message length, and return it */
if (PREDICT_TRUE (mp != 0))
{
mb = (msgbuf_t *) (((u8 *) mp) - offsetof (msgbuf_t, data));
data_len = clib_net_to_host_u32 (mb->data_len);
}
return data_len;
}
vl_api_trace_t *
vl_msg_api_trace_get (api_main_t * am, vl_api_trace_which_t which)
{
switch (which)
{
case VL_API_TRACE_RX:
return am->rx_trace;
case VL_API_TRACE_TX:
return am->tx_trace;
default:
return 0;
}
}
void
vl_noop_handler (void *mp)
{
}
static u8 post_mortem_dump_enabled;
void
vl_msg_api_post_mortem_dump_enable_disable (int enable)
{
post_mortem_dump_enabled = enable;
}
void
vl_msg_api_post_mortem_dump (void)
{
api_main_t *am = vlibapi_get_main ();
FILE *fp;
char filename[64];
int rv;
if (post_mortem_dump_enabled == 0)
return;
snprintf (filename, sizeof (filename), "/tmp/api_post_mortem.%d",
getpid ());
fp = fopen (filename, "w");
if (fp == NULL)
{
rv = write (2, "Couldn't create ", 16);
rv = write (2, filename, strlen (filename));
rv = write (2, "\n", 1);
return;
}
rv = vl_msg_api_trace_save (am, VL_API_TRACE_RX, fp);
fclose (fp);
if (rv < 0)
{
rv = write (2, "Failed to save post-mortem API trace to ", 40);
rv = write (2, filename, strlen (filename));
rv = write (2, "\n", 1);
}
}
/* Layered message handling support */
void
vl_msg_api_register_pd_handler (void *fp, u16 msg_id_host_byte_order)
{
api_main_t *am = vlibapi_get_main ();
/* Mild idiot proofing */
if (msg_id_host_byte_order > 10000)
clib_warning ("msg_id_host_byte_order endian issue? %d arg vs %d",
msg_id_host_byte_order,
clib_net_to_host_u16 (msg_id_host_byte_order));
vec_validate (am->pd_msg_handlers, msg_id_host_byte_order);
am->pd_msg_handlers[msg_id_host_byte_order] = fp;
}
int
vl_msg_api_pd_handler (void *mp, int rv)
{
api_main_t *am = vlibapi_get_main ();
int (*fp) (void *, int);
u16 msg_id;
if (clib_arch_is_little_endian)
msg_id = clib_net_to_host_u16 (*((u16 *) mp));
else
msg_id = *((u16 *) mp);
if (msg_id >= vec_len (am->pd_msg_handlers)
|| am->pd_msg_handlers[msg_id] == 0)
return rv;
fp = am->pd_msg_handlers[msg_id];
rv = (*fp) (mp, rv);
return rv;
}
void
vl_msg_api_set_first_available_msg_id (u16 first_avail)
{
api_main_t *am = vlibapi_get_main ();
am->first_available_msg_id = first_avail;
}
u16
vl_msg_api_get_msg_ids (const char *name, int n)
{
api_main_t *am = vlibapi_get_main ();
u8 *name_copy;
vl_api_msg_range_t *rp;
uword *p;
u16 rv;
if (am->msg_range_by_name == 0)
am->msg_range_by_name = hash_create_string (0, sizeof (uword));
name_copy = format (0, "%s%c", name, 0);
p = hash_get_mem (am->msg_range_by_name, name_copy);
if (p)
{
clib_warning ("WARNING: duplicate message range registration for '%s'",
name_copy);
vec_free (name_copy);
return ((u16) ~ 0);
}
if (n < 0 || n > 1024)
{
clib_warning
("WARNING: bad number of message-IDs (%d) requested by '%s'",
n, name_copy);
vec_free (name_copy);
return ((u16) ~ 0);
}
vec_add2 (am->msg_ranges, rp, 1);
rv = rp->first_msg_id = am->first_available_msg_id;
am->first_available_msg_id += n;
rp->last_msg_id = am->first_available_msg_id - 1;
rp->name = name_copy;
hash_set_mem (am->msg_range_by_name, name_copy, rp - am->msg_ranges);
return rv;
}
void
vl_msg_api_add_msg_name_crc (api_main_t * am, const char *string, u32 id)
{
uword *p;
if (am->msg_index_by_name_and_crc == 0)
am->msg_index_by_name_and_crc = hash_create_string (0, sizeof (uword));
p = hash_get_mem (am->msg_index_by_name_and_crc, string);
if (p)
{
clib_warning ("attempt to redefine '%s' ignored...", string);
return;
}
hash_set_mem (am->msg_index_by_name_and_crc, string, id);
}
void
vl_msg_api_add_version (api_main_t * am, const char *string,
u32 major, u32 minor, u32 patch)
{
api_version_t version = {.major = major,.minor = minor,.patch = patch };
ASSERT (strlen (string) < 64);
strncpy (version.name, string, 64 - 1);
vec_add1 (am->api_version_list, version);
}
u32
vl_msg_api_get_msg_index (u8 * name_and_crc)
{
api_main_t *am = vlibapi_get_main ();
uword *p;
if (am->msg_index_by_name_and_crc)
{
p = hash_get_mem (am->msg_index_by_name_and_crc, name_and_crc);
if (p)
return p[0];
}
return ~0;
}
void *
vl_msg_push_heap_w_region (svm_region_t * vlib_rp)
{
pthread_mutex_lock (&vlib_rp->mutex);
return svm_push_data_heap (vlib_rp);
}
void *
vl_msg_push_heap (void)
{
api_main_t *am = vlibapi_get_main ();
return vl_msg_push_heap_w_region (am->vlib_rp);
}
void
vl_msg_pop_heap_w_region (svm_region_t * vlib_rp, void *oldheap)
{
svm_pop_heap (oldheap);
pthread_mutex_unlock (&vlib_rp->mutex);
}
void
vl_msg_pop_heap (void *oldheap)
{
api_main_t *am = vlibapi_get_main ();
vl_msg_pop_heap_w_region (am->vlib_rp, oldheap);
}
/* Must be nul terminated */
int
vl_api_c_string_to_api_string (const char *buf, vl_api_string_t * str)
{
/* copy without nul terminator */
u32 len = strlen (buf);
if (len > 0)
clib_memcpy_fast (str->buf, buf, len);
str->length = htonl (len);
return len + sizeof (u32);
}
/* Must NOT be nul terminated */
int
vl_api_vec_to_api_string (const u8 * vec, vl_api_string_t * str)
{
u32 len = vec_len (vec);
clib_memcpy (str->buf, vec, len);
str->length = htonl (len);
return len + sizeof (u32);
}
u32
vl_api_string_len (vl_api_string_t * astr)
{
return clib_net_to_host_u32 (astr->length);
}
u8 *
vl_api_format_string (u8 * s, va_list * args)
{
vl_api_string_t *a = va_arg (*args, vl_api_string_t *);
vec_add (s, a->buf, clib_net_to_host_u32 (a->length));
return s;
}
/*
* Returns a new vector. Remember to free it after use.
* NOT nul terminated.
*/
u8 *
vl_api_from_api_to_new_vec (void *mp, vl_api_string_t * astr)
{
u8 *v = 0;
if (vl_msg_api_max_length (mp) < clib_net_to_host_u32 (astr->length))
return format (0, "insane astr->length %u%c",
clib_net_to_host_u32 (astr->length), 0);
vec_add (v, astr->buf, clib_net_to_host_u32 (astr->length));
return v;
}
/*
* Returns a new vector. Remember to free it after use.
* Nul terminated.
*/
char *
vl_api_from_api_to_new_c_string (vl_api_string_t * astr)
{
char *v = 0;
if (clib_net_to_host_u32 (astr->length) > 0)
{
vec_add (v, astr->buf, clib_net_to_host_u32 (astr->length));
vec_add1 (v, 0);
}
return v;
}
void
vl_api_set_elog_main (elog_main_t * m)
{
api_main_t *am = vlibapi_get_main ();
am->elog_main = m;
}
int
vl_api_set_elog_trace_api_messages (int enable)
{
int rv;
api_main_t *am = vlibapi_get_main ();
rv = am->elog_trace_api_messages;
am->elog_trace_api_messages = enable;
return rv;
}
int
vl_api_get_elog_trace_api_messages (void)
{
api_main_t *am = vlibapi_get_main ();
return am->elog_trace_api_messages;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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