npppd_ctl_add_started_ppp_id
if (npppd_ctl_add_started_ppp_id(c->ctx, ppp->id) == 0) {
int npppd_ctl_add_started_ppp_id(struct npppd_ctl *, uint32_t);
if (npppd_ctl_add_started_ppp_id(_this, ppp->id) != 0)