func_evalexten.c File Reference

Dialplan extension evaluation function. More...

#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"

Include dependency graph for func_evalexten.c:

Go to the source code of this file.

Functions
	AST_MODULE_INFO_STANDARD_EXTENDED (ASTERISK_GPL_KEY, "Extension evaluation function")
static int	eval_exten_read (struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
static int	eval_sub_read (struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
static int	load_module (void)
static int	unload_module (void)

Variables
static struct ast_custom_function	eval_exten_function
static struct ast_custom_function	eval_sub_function

Detailed Description

Dialplan extension evaluation function.

Author

Naveen Albert aster.nosp@m.isk@.nosp@m.phrea.nosp@m.knet.nosp@m..org

Definition in file func_evalexten.c.

Function Documentation

AST_MODULE_INFO_STANDARD_EXTENDED()

AST_MODULE_INFO_STANDARD_EXTENDED	(	ASTERISK_GPL_KEY	,
		"Extension evaluation function"
	)

eval_exten_read()

static int eval_exten_read ( struct ast_channel *  chan, const char *  cmd, char *  data, char *  buf, size_t  len  )

static

Definition at line 146 of file func_evalexten.c.

{
    char *exten, *pri, *context, *parse;
    int ipri;
    char tmpbuf[len];
 
    if (ast_strlen_zero(data)) {
        ast_log(LOG_WARNING, "The EVAL_EXTEN function requires an extension\n");
        return -1;
    }
 
    parse = ast_strdupa(data);
    /* Split context,exten,pri */
    context = strsep(&parse, ",");
    exten = strsep(&parse, ",");
    pri = strsep(&parse, ",");
 
    if (pbx_parse_location(chan, &context, &exten, &pri, &ipri, NULL, NULL)) {
        return -1;
    }
 
    if (ast_strlen_zero(exten) || ast_strlen_zero(context)) { /* only lock if we really need to */
        ast_channel_lock(chan);
        if (ast_strlen_zero(exten)) {
            exten = ast_strdupa(ast_channel_exten(chan));
        }
        if (ast_strlen_zero(context)) {
            context = ast_strdupa(ast_channel_context(chan));
        }
        ast_channel_unlock(chan);
    }
 
    if (ast_get_extension_data(tmpbuf, len, chan, context, exten, ipri)) {
        return -1; /* EVAL_EXTEN failed */
    }
 
    pbx_substitute_variables_helper_full_location(chan, (chan) ? ast_channel_varshead(chan) : NULL, tmpbuf, buf, len, NULL, context, exten, ipri);
 
    return 0;
}

References ast_channel_context(), ast_channel_exten(), ast_channel_lock, ast_channel_unlock, ast_channel_varshead(), ast_get_extension_data(), ast_log, ast_strdupa, ast_strlen_zero(), buf, voicemailpwcheck::context, len(), LOG_WARNING, NULL, pbx_parse_location(), pbx_substitute_variables_helper_full_location(), and strsep().

eval_sub_read()

static int eval_sub_read ( struct ast_channel *  chan, const char *  cmd, char *  data, char *  buf, size_t  len  )

static

Definition at line 187 of file func_evalexten.c.

{
    int gosub_res;
    const char *retval;
 
    if (ast_strlen_zero(data)) {
        ast_log(LOG_WARNING, "The EVAL_SUB function requires an extension\n");
        *buf = '\0';
        return -1;
    }
 
    /* Ignore hangups since we want to retrieve a value, and this function could be called at hangup time */
    gosub_res = ast_app_exec_sub(NULL, chan, data, 1);
    if (gosub_res) {
        ast_log(LOG_WARNING, "Failed to execute Gosub(%s)\n", data);
        *buf = '\0';
        return -1;
    }
 
    ast_channel_lock(chan);
    retval = pbx_builtin_getvar_helper(chan, "GOSUB_RETVAL");
    ast_copy_string(buf, S_OR(retval, ""), len); /* Overwrite, even if empty, to ensure a stale GOSUB_RETVAL isn't returned as our value */
    ast_channel_unlock(chan);
 
    return 0;
}

References ast_app_exec_sub(), ast_channel_lock, ast_channel_unlock, ast_copy_string(), ast_log, ast_strlen_zero(), buf, len(), LOG_WARNING, NULL, pbx_builtin_getvar_helper(), retval, and S_OR.

load_module()

static int load_module ( void  )

static

Definition at line 232 of file func_evalexten.c.

{
    int res = 0;
    res |= ast_custom_function_register(&eval_exten_function);
    res |= ast_custom_function_register(&eval_sub_function);
    return res;
}

References ast_custom_function_register, eval_exten_function, and eval_sub_function.

unload_module()

static int unload_module ( void  )

static

Definition at line 224 of file func_evalexten.c.

{
    int res = 0;
    res |= ast_custom_function_unregister(&eval_exten_function);
    res |= ast_custom_function_unregister(&eval_sub_function);
    return res;
}

References ast_custom_function_unregister(), eval_exten_function, and eval_sub_function.

Variable Documentation

eval_exten_function

struct ast_custom_function eval_exten_function

static

Initial value:

= {
    .name = "EVAL_EXTEN",
    .read = eval_exten_read,
}

Definition at line 214 of file func_evalexten.c.

Referenced by load_module(), and unload_module().

eval_sub_function

struct ast_custom_function eval_sub_function

static

Initial value:

= {
    .name = "EVAL_SUB",
    .read = eval_sub_read,
}

Definition at line 219 of file func_evalexten.c.

Referenced by load_module(), and unload_module().