Function route_param_get

action.c:551–614

function used to get parameter from a route scope */

/* function used to get parameter from a route scope */
static int route_param_get(struct sip_msg *msg,  pv_param_t *ip,
		pv_value_t *res, void *_params, void *_extra)
{
	int index;
	pv_value_t tv;
	pv_value_t *params = (pv_value_t *)_params;
	int params_no = (int)(unsigned long)_extra;

	if (params_no <= 0) {
		LM_DBG("route without parameters\n");
		return pv_get_null(msg, ip, res);
	}

	if(ip->pvn.type==PV_NAME_INTSTR)
	{
		if (ip->pvn.u.isname.type != 0)
		{
			LM_ERR("route $param variable accepts only integer indexes\n");
			return -1;
		}
		index = ip->pvn.u.isname.name.n;
	} else
	{
		/* pvar -> it might be another $param variable! */
		route_rec_level--;
		if(pv_get_spec_value(msg, (pv_spec_p)(ip->pvn.u.dname), &tv)!=0)
		{
			LM_ERR("cannot get spec value\n");
			route_rec_level++;
			return -1;
		}
		route_rec_level++;

		if(tv.flags&PV_VAL_NULL || tv.flags&PV_VAL_EMPTY)
		{
			LM_ERR("null or empty name\n");
			return -1;
		}
		if (!(tv.flags&PV_VAL_INT) || str2int(&tv.rs,(unsigned int*)&index) < 0)
		{
			LM_ERR("invalid index <%.*s>\n", tv.rs.len, tv.rs.s);
			return -1;
		}
	}

	if (!params)
	{
		LM_DBG("no parameter specified for this route\n");
		return pv_get_null(msg, ip, res);
	}

	if (index < 1 || index > params_no)
	{
		LM_DBG("no such parameter index %d\n", index);
		return pv_get_null(msg, ip, res);
	}

	/* the parameters start at 0, whereas the index starts from 1 */