[sr-dev] [tracker] Task opened: function for evaluating string value

[sip-router]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Juha Heinanen (jh) 

Attached to Project - sip-router
Summary - function for evaluating string value
Task Type - Feature Request
Category - Module
Status - New
Assigned To - 
Operating System - All
Severity - Medium
Priority - Normal
Reported Version - Development
Due in Version - Undecided
Due Date - Undecided
Details - it would improve dynamic configuration of sip proxy if a function or transformation would exist for evaluating a string value stored in a pseudo variable that contains pseudo variables, transformations, etc.

i tried to implement such function (below), but was not able to make it work.  any help is appreciated.

-- juha


/* 
 * Evaluates first param (string) and saves result to second param (pvar)
 */
int eval(struct sip_msg* _m, char* _string, char* _dst)
{
    str value, result;
    char **param;
    pv_spec_t *dst;
    pv_value_t val;
    fparam_t *fp;

    if (fixup_get_svalue(_m, (gparam_p)_string, &value) != 0) {
	LM_ERR("cannot get parameter value\n");
	return -1;
    }

    param = &(value.s);
    LM_INFO("param value as string is <%s>\n", *param);

    if (fixup_spve_null((void **)param, 1) != 0) {
	LM_ERR("failed to evaluate parameter <%.*s>\n", value.len, value.s);
	return -1;
    }

    fp = (fparam_t *)param;

    LM_INFO("orig <%s>, type <%d>\n", fp->orig, fp->type);
    if (get_str_fparam(&result, _m, fp) != 0) {
	LM_ERR("cannot get result value\n");
	return -1;
    }
    
    val.rs.s = result.s;
    val.rs.len = result.len;
    LM_INFO("eval result: %.*s\n", val.rs.len, val.rs.s);
    val.flags = PV_VAL_STR;
    dst = (pv_spec_t *)_dst;
    dst->setf(_m, &dst->pvp, (int)EQ_T, &val);
    
    return 1;
}


More information can be found at the following URL:
http://sip-router.org/tracker/index.php?do=details&task_id=78

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