ipmp_getifinfo
err = ipmp_getifinfo(ih, iflistp->il_ifs[i], &ifinfop);
err = ipmp_getifinfo(arg->sa_ih, iflistp->il_ifs[i], &ifinfop);
err = ipmp_getifinfo(arg->sa_ih, iflistp->il_ifs[i], &ifinfop);
extern int ipmp_getifinfo(ipmp_handle_t, const char *, ipmp_ifinfo_t **);