sclp_find_gds_subvector
sv = sclp_find_gds_subvector(v + 1, (void *) v + v->length, 0x81);
netid = sclp_find_gds_subvector(sv + 1, (void *) sv + sv->length, 1);
cpc = sclp_find_gds_subvector(sv + 1, (void *) sv + sv->length, 2);