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"

Include dependency graph for res_timing_dahdi.c:

Go to the source code of this file.

Data Structures
struct	dahdi_timer

Macros
#define	SEE_TIMING   "For more information on Asterisk timing modules, including ways to potentially fix this problem, please see https://docs.asterisk.org/Configuration/Core-Configuration/Timing-Interfaces/\n"

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static int	dahdi_test_timer (void)
static int	dahdi_timer_ack (void *data, unsigned int quantity)
static void	dahdi_timer_close (void *data)
static int	dahdi_timer_disable_continuous (void *data)
static int	dahdi_timer_enable_continuous (void *data)
static int	dahdi_timer_fd (void *data)
static enum ast_timer_event	dahdi_timer_get_event (void *data)
static unsigned int	dahdi_timer_get_max_rate (void *data)
static void *	dahdi_timer_open (void)
static int	dahdi_timer_set_rate (void *data, 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 = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_TIMING, }
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_timing_interface	dahdi_timing
static void *	timing_funcs_handle

Detailed Description

DAHDI timing interface.

Author

Russell Bryant russe.nosp@m.ll@d.nosp@m.igium.nosp@m..com

Definition in file res_timing_dahdi.c.

Macro Definition Documentation

SEE_TIMING

#define SEE_TIMING   "For more information on Asterisk timing modules, including ways to potentially fix this problem, please see https://docs.asterisk.org/Configuration/Core-Configuration/Timing-Interfaces/\n"

Definition at line 173 of file res_timing_dahdi.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 240 of file res_timing_dahdi.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 240 of file res_timing_dahdi.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 240 of file res_timing_dahdi.c.

dahdi_test_timer()

static int dahdi_test_timer ( void  )

static

Definition at line 175 of file res_timing_dahdi.c.

{
    int fd;
    int x = 160;
 
    fd = open("/dev/dahdi/timer", O_RDWR);
 
    if (fd < 0) {
        return -1;
    }
 
    if (ioctl(fd, DAHDI_TIMERCONFIG, &x)) {
        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);
        close(fd);
        return -1;
    }
 
    if ((x = ast_wait_for_input(fd, 300)) < 0) {
        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);
        close(fd);
        return -1;
    }
 
    if (!x) {
        const char dahdi_timer_error[] = {
            "Asterisk has detected a problem with your DAHDI configuration and will shutdown for your protection.  You have options:"
            "\n\t1. You only have to compile DAHDI support into Asterisk if you need it.  One option is to recompile without DAHDI support."
            "\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."
            "\n\t3. If you need DAHDI services, you must correctly configure DAHDI."
        };
        ast_log(LOG_ERROR, "%s\n" SEE_TIMING, dahdi_timer_error);
        usleep(100);
        close(fd);
        return -1;
    }
 
    close(fd);
 
    return 0;
}

References ast_log, ast_wait_for_input(), dahdi_timer::fd, LOG_ERROR, and SEE_TIMING.

Referenced by load_module().

dahdi_timer_ack()

static int dahdi_timer_ack ( void *  data, unsigned int  quantity  )

static

Definition at line 117 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer = data;
 
    return ioctl(timer->fd, DAHDI_TIMERACK, &quantity) ? -1 : 0;
}

References timer.

dahdi_timer_close()

static void dahdi_timer_close ( void *  data )

static

Definition at line 91 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer = data;
 
    close(timer->fd);
    ast_free(timer);
}

References ast_free, and timer.

dahdi_timer_disable_continuous()

static int dahdi_timer_disable_continuous ( void *  data )

static

Definition at line 132 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer = data;
    int flags = -1;
 
    return ioctl(timer->fd, DAHDI_TIMERPONG, &flags) ? -1 : 0;
}

References timer.

dahdi_timer_enable_continuous()

static int dahdi_timer_enable_continuous ( void *  data )

static

Definition at line 124 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer = data;
    int flags = 1;
 
    return ioctl(timer->fd, DAHDI_TIMERPING, &flags) ? -1 : 0;
}

References timer.

dahdi_timer_fd()

static int dahdi_timer_fd ( void *  data )

static

Definition at line 166 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer = data;
 
    return timer->fd;
}

References timer.

dahdi_timer_get_event()

static enum ast_timer_event dahdi_timer_get_event ( void *  data )

static

Definition at line 140 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer = data;
    int res;
    int event;
 
    res = ioctl(timer->fd, DAHDI_GETEVENT, &event);
 
    if (res) {
        event = DAHDI_EVENT_TIMER_EXPIRED;
    }
 
    switch (event) {
    case DAHDI_EVENT_TIMER_PING:
        return AST_TIMING_EVENT_CONTINUOUS;
    case DAHDI_EVENT_TIMER_EXPIRED:
    default:
        return AST_TIMING_EVENT_EXPIRED;
    }
}

References AST_TIMING_EVENT_CONTINUOUS, AST_TIMING_EVENT_EXPIRED, and timer.

dahdi_timer_get_max_rate()

static unsigned int dahdi_timer_get_max_rate ( void *  data )

static

Definition at line 161 of file res_timing_dahdi.c.

{
    return 1000;
}

dahdi_timer_open()

static void * dahdi_timer_open ( void  )

static

Definition at line 74 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer;
 
    if (!(timer = ast_calloc(1, sizeof(*timer)))) {
        return NULL;
    }
 
    if ((timer->fd = open("/dev/dahdi/timer", O_RDWR)) < 0) {
        ast_log(LOG_ERROR, "Failed to create dahdi timer: %s\n", strerror(errno));
        ast_free(timer);
        return NULL;
    }
 
    return timer;
}

References ast_calloc, ast_free, ast_log, errno, LOG_ERROR, NULL, and timer.

dahdi_timer_set_rate()

static int dahdi_timer_set_rate ( void *  data, unsigned int  rate  )

static

Definition at line 99 of file res_timing_dahdi.c.

{
    struct dahdi_timer *timer = data;
    int samples;
 
    /* DAHDI timers are configured using a number of samples,
     * based on an 8 kHz sample rate. */
    samples = (unsigned int) roundf((8000.0 / ((float) rate)));
 
    if (ioctl(timer->fd, DAHDI_TIMERCONFIG, &samples)) {
        ast_log(LOG_ERROR, "Failed to configure DAHDI timing fd for %d sample timer ticks\n",
            samples);
        return -1;
    }
 
    return 0;
}

References ast_log, LOG_ERROR, roundf(), and timer.

load_module()

static int load_module ( void  )

static

Definition at line 216 of file res_timing_dahdi.c.

{
    if (dahdi_test_timer()) {
        return AST_MODULE_LOAD_DECLINE;
    }
 
    return (timing_funcs_handle = ast_register_timing_interface(&dahdi_timing)) ?
        AST_MODULE_LOAD_SUCCESS : AST_MODULE_LOAD_DECLINE;
}

References AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_register_timing_interface, dahdi_test_timer(), dahdi_timing, and timing_funcs_handle.

unload_module()

static int unload_module ( void  )

static

Definition at line 226 of file res_timing_dahdi.c.

{
    if (timing_funcs_handle) {
        return ast_unregister_timing_interface(timing_funcs_handle);
    }
 
    return 0;
}

References ast_unregister_timing_interface(), and timing_funcs_handle.

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "DAHDI Timing Interface" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_TIMING, }

static

Definition at line 240 of file res_timing_dahdi.c.

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 240 of file res_timing_dahdi.c.

dahdi_timing

struct ast_timing_interface dahdi_timing

static

Definition at line 56 of file res_timing_dahdi.c.

                                                  {
    .name = "DAHDI",
    .priority = 100,
    .timer_open = dahdi_timer_open,
    .timer_close = dahdi_timer_close,
    .timer_set_rate = dahdi_timer_set_rate,
    .timer_ack = dahdi_timer_ack,
    .timer_enable_continuous = dahdi_timer_enable_continuous,
    .timer_disable_continuous = dahdi_timer_disable_continuous,
    .timer_get_event = dahdi_timer_get_event,
    .timer_get_max_rate = dahdi_timer_get_max_rate,
    .timer_fd = dahdi_timer_fd,
};

Referenced by load_module().

timing_funcs_handle

void* timing_funcs_handle

static

Definition at line 44 of file res_timing_dahdi.c.

Referenced by load_module(), and unload_module().