FS-4183 here is a start, it still needs some work but here are the basic components, initially I am using the algorithim we use to generate artifical silence (static) and using one of those values to sleep a certian number of microseconds plus the cumulative bytes of events but i bet there is still some predictability in there so it needs some more
This commit is contained in:
Anthony Minessale
parent
44fd0de8ff
commit
172e4a3041
|
|
@ -42,6 +42,7 @@ applications/mod_valet_parking
|
|||
#applications/mod_vmd
|
||||
applications/mod_voicemail
|
||||
#applications/mod_voicemail_ivr
|
||||
#applications/mod_random
|
||||
#asr_tts/mod_cepstral
|
||||
#asr_tts/mod_flite
|
||||
#asr_tts/mod_pocketsphinx
|
||||
|
|
|
|||
|
|
@ -63,6 +63,7 @@
|
|||
<load module="mod_valet_parking"/>
|
||||
<!--<load module="mod_fsk"/>-->
|
||||
<!--<load module="mod_spy"/>-->
|
||||
<!--<load module="mod_random"/>-->
|
||||
<load module="mod_httapi"/>
|
||||
|
||||
<!-- SNOM Module -->
|
||||
|
|
|
|||
|
|
@ -0,0 +1,234 @@
|
|||
/*
|
||||
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
|
||||
* Copyright (C) 2005-2012, Anthony Minessale II <anthm@freeswitch.org>
|
||||
*
|
||||
* Version: MPL 1.1
|
||||
*
|
||||
* The contents of this file are subject to the Mozilla Public License Version
|
||||
* 1.1 (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.mozilla.org/MPL/
|
||||
*
|
||||
* Software distributed under the License is distributed on an "AS IS" basis,
|
||||
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
||||
* for the specific language governing rights and limitations under the
|
||||
* License.
|
||||
*
|
||||
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
|
||||
*
|
||||
* The Initial Developer of the Original Code is
|
||||
* Anthony Minessale II <anthm@freeswitch.org>
|
||||
* Portions created by the Initial Developer are Copyright (C)
|
||||
* the Initial Developer. All Rights Reserved.
|
||||
*
|
||||
* Contributor(s):
|
||||
*
|
||||
* Anthony Minessale II <anthm@freeswitch.org>
|
||||
* Neal Horman <neal at wanlink dot com>
|
||||
*
|
||||
*
|
||||
* mod_random.c -- entropy source module
|
||||
*
|
||||
*/
|
||||
#include <switch.h>
|
||||
|
||||
/* Prototypes */
|
||||
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_random_shutdown);
|
||||
SWITCH_MODULE_RUNTIME_FUNCTION(mod_random_runtime);
|
||||
SWITCH_MODULE_LOAD_FUNCTION(mod_random_load);
|
||||
|
||||
SWITCH_MODULE_DEFINITION(mod_random, mod_random_load, mod_random_shutdown, mod_random_runtime);
|
||||
|
||||
static int RUNNING = 0;
|
||||
static const char *random_device_files[] = { "/dev/hwrandom", "/dev/random", NULL };
|
||||
const char *random_device_file = NULL;
|
||||
|
||||
static void event_handler(switch_event_t *event);
|
||||
|
||||
|
||||
SWITCH_MODULE_LOAD_FUNCTION(mod_random_load)
|
||||
{
|
||||
|
||||
#ifdef WIN32
|
||||
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "%s missing window support\n", modname);
|
||||
return SWITCH_STATUS_NOTIMPL;
|
||||
#endif
|
||||
|
||||
int i = 0;
|
||||
|
||||
|
||||
for(i = 0 ;random_device_files[i]; i++) {
|
||||
if (switch_file_exists(random_device_files[i], pool) == SWITCH_STATUS_SUCCESS) {
|
||||
random_device_file = random_device_files[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
if (!random_device_file) {
|
||||
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "%s can't locate a random device file\n", modname);
|
||||
return SWITCH_STATUS_FALSE;
|
||||
}
|
||||
|
||||
|
||||
if ((switch_event_bind(modname, SWITCH_EVENT_ALL, NULL, event_handler, NULL) != SWITCH_STATUS_SUCCESS)) {
|
||||
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Couldn't bind!\n");
|
||||
return SWITCH_STATUS_TERM;
|
||||
}
|
||||
|
||||
/* connect my internal structure to the blank pointer passed to me */
|
||||
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
|
||||
|
||||
RUNNING = 1;
|
||||
|
||||
/* indicate that the module should continue to be loaded */
|
||||
return SWITCH_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_random_shutdown)
|
||||
{
|
||||
|
||||
switch_event_unbind_callback(event_handler);
|
||||
|
||||
RUNNING = 0;
|
||||
|
||||
return SWITCH_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
#if WIN32
|
||||
SWITCH_MODULE_RUNTIME_FUNCTION(mod_random_runtime)
|
||||
{
|
||||
RUNNING = 0;
|
||||
return SWITCH_STATUS_TERM;
|
||||
}
|
||||
#else
|
||||
|
||||
#include <unistd.h>
|
||||
#include <stdint.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <errno.h>
|
||||
#include <syslog.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/poll.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/time.h>
|
||||
#include <time.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/random.h>
|
||||
#include <string.h>
|
||||
|
||||
|
||||
|
||||
typedef struct {
|
||||
int count;
|
||||
int size;
|
||||
unsigned char *data;
|
||||
} entropy_t;
|
||||
|
||||
|
||||
static int random_add_entropy(int fd, void *buf, size_t size)
|
||||
{
|
||||
entropy_t e = { 0 };
|
||||
int r = 0;
|
||||
|
||||
e.count = size * 8;
|
||||
e.size = size;
|
||||
e.data = (unsigned char *) buf;
|
||||
|
||||
if (ioctl(fd, RNDADDENTROPY, &e) != 0) {
|
||||
r = 1;
|
||||
}
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static int rng_read(int fd, void *buf, size_t size)
|
||||
{
|
||||
size_t off = 0;
|
||||
ssize_t r;
|
||||
unsigned char *bp = (unsigned char *) buf;
|
||||
|
||||
while (size > 0) {
|
||||
do {
|
||||
r = read(fd, bp + off, size);
|
||||
} while ((r == -1) && (errno == EINTR));
|
||||
|
||||
if (r <= 0) {
|
||||
break;
|
||||
}
|
||||
|
||||
off += r;
|
||||
size -= r;
|
||||
}
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
static int rfd = 0;
|
||||
|
||||
static void event_handler(switch_event_t *event)
|
||||
{
|
||||
char *buf;
|
||||
|
||||
if (switch_event_serialize(event, &buf, SWITCH_TRUE) == SWITCH_STATUS_SUCCESS) {
|
||||
random_add_entropy(rfd, buf, strlen(buf));
|
||||
free(buf);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
SWITCH_MODULE_RUNTIME_FUNCTION(mod_random_runtime)
|
||||
{
|
||||
|
||||
unsigned char data[1024] = {0};
|
||||
|
||||
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "%s Thread starting using random_device_file %s\n", modname, random_device_file);
|
||||
|
||||
if ((rfd = open(random_device_file, O_RDWR)) < 0) {
|
||||
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "%s Error opening random_device_file %s\n", modname, random_device_file);
|
||||
RUNNING = 0;
|
||||
}
|
||||
|
||||
rng_read(rfd, data, 4);
|
||||
|
||||
while(RUNNING) {
|
||||
int16_t data[64];
|
||||
int i = 0;
|
||||
int len = sizeof(data) / 2;
|
||||
|
||||
switch_generate_sln_silence(data, len, 1);
|
||||
random_add_entropy(rfd, data, len);
|
||||
|
||||
while(i < len && !data[i]) i++;
|
||||
|
||||
if (i < len) {
|
||||
switch_yield(abs(data[i]) * 1000);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
if (rfd > -1) {
|
||||
close(rfd);
|
||||
}
|
||||
|
||||
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "%s Thread ending\n", modname);
|
||||
|
||||
return SWITCH_STATUS_TERM;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
/* For Emacs:
|
||||
* Local Variables:
|
||||
* mode:c
|
||||
* indent-tabs-mode:t
|
||||
* tab-width:4
|
||||
* c-basic-offset:4
|
||||
* End:
|
||||
* For VIM:
|
||||
* vim:set softtabstop=4 shiftwidth=4 tabstop=4
|
||||
*/
|
||||
Loading…
Reference in New Issue