nlist_t* nets_make_list(vscf_data_t* nets_cfg, dclists_t* dclists, const char* map_name) {
nlist_t* nl = nlist_new(map_name, false);
if(nets_cfg) {
dmn_assert(vscf_is_hash(nets_cfg));
if(nets_parse(nets_cfg, dclists, map_name, nl)) {
nlist_destroy(nl);
nl = NULL;
}
}
if(nl) {
// This masks out the 5x v4-like spaces that we *never*
// lookup directly. These "NN_UNDEF" dclists will
// never be seen by runtime lookups. The only
// reason these exist is so that supernets and
// adjacent networks get proper masks. Otherwise
// lookups in these nearby spaces might return
// oversized edns-client-subnet masks and cause
// the cache to affect lookup of these spaces...
nlist_append(nl, start_v4mapped, 96, NN_UNDEF);
nlist_append(nl, start_siit, 96, NN_UNDEF);
nlist_append(nl, start_wkp, 96, NN_UNDEF);
nlist_append(nl, start_6to4, 16, NN_UNDEF);
nlist_append(nl, start_teredo, 32, NN_UNDEF);
nlist_finish(nl);
}
return nl;
}
F_NONNULL F_NOINLINE
static void isolate_jmp(geoip2_t* db, nlist_t** nl) {
dmn_assert(db); dmn_assert(nl);
*nl = nlist_new(db->map_name, true);
if(!sigsetjmp(db->jbuf, 0)) {
geoip2_list_xlate(db, *nl);
nlist_finish(*nl);
}
else {
nlist_destroy(*nl);
*nl = NULL;
}
}
