Wed Aug 7 17:16:12 2019

Asterisk developer's documentation


res_timing_dahdi.c File Reference

DAHDI timing interface. More...

#include "asterisk.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <math.h>
#include <dahdi/user.h>
#include "asterisk/module.h"
#include "asterisk/timing.h"
#include "asterisk/utils.h"

Go to the source code of this file.

Defines

#define SEE_TIMING   "For more information on Asterisk timing modules, including ways to potentially fix this problem, please see https://wiki.asterisk.org/wiki/display/AST/Timing+Interfaces\n"

Functions

static void __reg_module (void)
static void __unreg_module (void)
 ASTERISK_FILE_VERSION (__FILE__,"$Revision: 413586 $")
static int dahdi_test_timer (void)
static int dahdi_timer_ack (int handle, unsigned int quantity)
static void dahdi_timer_close (int handle)
static int dahdi_timer_disable_continuous (int handle)
static int dahdi_timer_enable_continuous (int handle)
static enum ast_timer_event dahdi_timer_get_event (int handle)
static unsigned int dahdi_timer_get_max_rate (int handle)
static int dahdi_timer_open (void)
static int dahdi_timer_set_rate (int handle, unsigned int rate)
static int load_module (void)
static int unload_module (void)

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "DAHDI Timing Interface" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_TIMING, }
static struct ast_module_infoast_module_info = &__mod_info
static struct ast_timing_interface dahdi_timing
static void * timing_funcs_handle

Detailed Description

DAHDI timing interface.

Author:
Russell Bryant <russell@digium.com>

Definition in file res_timing_dahdi.c.


Define Documentation

#define SEE_TIMING   "For more information on Asterisk timing modules, including ways to potentially fix this problem, please see https://wiki.asterisk.org/wiki/display/AST/Timing+Interfaces\n"

Definition at line 139 of file res_timing_dahdi.c.

Referenced by dahdi_test_timer().


Function Documentation

static void __reg_module ( void   )  [static]

Definition at line 205 of file res_timing_dahdi.c.

static void __unreg_module ( void   )  [static]

Definition at line 205 of file res_timing_dahdi.c.

ASTERISK_FILE_VERSION ( __FILE__  ,
"$Revision: 413586 $"   
)
static int dahdi_test_timer ( void   )  [static]

Definition at line 141 of file res_timing_dahdi.c.

References ast_log(), ast_wait_for_input(), LOG_ERROR, and SEE_TIMING.

Referenced by load_module().

00142 {
00143    int fd;
00144    int x = 160;
00145    
00146    fd = open("/dev/dahdi/timer", O_RDWR);
00147 
00148    if (fd < 0) {
00149       return -1;
00150    }
00151 
00152    if (ioctl(fd, DAHDI_TIMERCONFIG, &x)) {
00153       ast_log(LOG_ERROR, "You have DAHDI built and drivers loaded, but the DAHDI timer test failed to set DAHDI_TIMERCONFIG to %d.\n" SEE_TIMING, x);
00154       close(fd);
00155       return -1;
00156    }
00157 
00158    if ((x = ast_wait_for_input(fd, 300)) < 0) {
00159       ast_log(LOG_ERROR, "You have DAHDI built and drivers loaded, but the DAHDI timer could not be polled during the DAHDI timer test.\n" SEE_TIMING);
00160       close(fd);
00161       return -1;
00162    }
00163 
00164    if (!x) {
00165       const char dahdi_timer_error[] = {
00166          "Asterisk has detected a problem with your DAHDI configuration and will shutdown for your protection.  You have options:"
00167          "\n\t1. You only have to compile DAHDI support into Asterisk if you need it.  One option is to recompile without DAHDI support."
00168          "\n\t2. You only have to load DAHDI drivers if you want to take advantage of DAHDI services.  One option is to unload DAHDI modules if you don't need them."
00169          "\n\t3. If you need DAHDI services, you must correctly configure DAHDI."
00170       };
00171       ast_log(LOG_ERROR, "%s\n" SEE_TIMING, dahdi_timer_error);
00172       usleep(100);
00173       close(fd);
00174       return -1;
00175    }
00176 
00177    close(fd);
00178 
00179    return 0;
00180 }

static int dahdi_timer_ack ( int  handle,
unsigned int  quantity 
) [static]

Definition at line 95 of file res_timing_dahdi.c.

00096 {
00097    return ioctl(handle, DAHDI_TIMERACK, &quantity) ? -1 : 0;
00098 }

static void dahdi_timer_close ( int  handle  )  [static]

Definition at line 75 of file res_timing_dahdi.c.

00076 {
00077    close(handle);
00078 }

static int dahdi_timer_disable_continuous ( int  handle  )  [static]

Definition at line 107 of file res_timing_dahdi.c.

00108 {
00109    int flags = -1;
00110 
00111    return ioctl(handle, DAHDI_TIMERPONG, &flags) ? -1 : 0;
00112 }

static int dahdi_timer_enable_continuous ( int  handle  )  [static]

Definition at line 100 of file res_timing_dahdi.c.

00101 {
00102    int flags = 1;
00103 
00104    return ioctl(handle, DAHDI_TIMERPING, &flags) ? -1 : 0;
00105 }

static enum ast_timer_event dahdi_timer_get_event ( int  handle  )  [static]

Definition at line 114 of file res_timing_dahdi.c.

References AST_TIMING_EVENT_CONTINUOUS, and AST_TIMING_EVENT_EXPIRED.

00115 {
00116    int res;
00117    int event;
00118 
00119    res = ioctl(handle, DAHDI_GETEVENT, &event);
00120 
00121    if (res) {
00122       event = DAHDI_EVENT_TIMER_EXPIRED;
00123    }
00124 
00125    switch (event) {
00126    case DAHDI_EVENT_TIMER_PING:
00127       return AST_TIMING_EVENT_CONTINUOUS;
00128    case DAHDI_EVENT_TIMER_EXPIRED:
00129    default:
00130       return AST_TIMING_EVENT_EXPIRED; 
00131    }
00132 }

static unsigned int dahdi_timer_get_max_rate ( int  handle  )  [static]

Definition at line 134 of file res_timing_dahdi.c.

00135 {
00136    return 1000;
00137 }

static int dahdi_timer_open ( void   )  [static]

Definition at line 70 of file res_timing_dahdi.c.

00071 {
00072    return open("/dev/dahdi/timer", O_RDWR);
00073 }

static int dahdi_timer_set_rate ( int  handle,
unsigned int  rate 
) [static]

Definition at line 80 of file res_timing_dahdi.c.

References ast_log(), and LOG_ERROR.

00081 {
00082    /* DAHDI timers are configured using a number of samples,
00083     * based on an 8 kHz sample rate. */
00084    unsigned int samples = roundf((8000.0 / ((float) rate)));
00085 
00086    if (ioctl(handle, DAHDI_TIMERCONFIG, &samples)) {
00087       ast_log(LOG_ERROR, "Failed to configure DAHDI timing fd for %u sample timer ticks\n",
00088          samples);
00089       return -1;
00090    }
00091 
00092    return 0;
00093 }

static int load_module ( void   )  [static]
static int unload_module ( void   )  [static]

Definition at line 192 of file res_timing_dahdi.c.

References ast_unregister_timing_interface(), and timing_funcs_handle.

00193 {
00194    if (timing_funcs_handle) {
00195       return ast_unregister_timing_interface(timing_funcs_handle);
00196    }
00197 
00198    return 0;
00199 }


Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "DAHDI Timing Interface" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_TIMING, } [static]

Definition at line 205 of file res_timing_dahdi.c.

Definition at line 205 of file res_timing_dahdi.c.

Definition at line 57 of file res_timing_dahdi.c.

void* timing_funcs_handle [static]

Definition at line 46 of file res_timing_dahdi.c.

Referenced by load_module(), and unload_module().


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