rem: fr_inv_timer_param.len = strlen(fr_timer_param.s);
add: fr_inv_timer_param.len = strlen(fr_inv_timer_param.s);
context: void init_avp_params(void){	fr_timer_avp.s = &fr_timer_param;	fr_inv_timer_avp.s = &fr_inv_timer_param;	fr_timer_param.len = strlen(fr_timer_param.s);	fr_inv_timer_param.len = strlen(fr_timer_param.s);}