tdb_hash
int tdb_hash(u_int32_t, union sockaddr_union *, u_int8_t);
hashval = tdb_hash(spi, dst, proto);
hashval = tdb_hash(0, src, proto);
hashval = tdb_hash(0, &su_null, proto);
hashval = tdb_hash(0, dst, sproto);
hashval = tdb_hash(0, src, sproto);
hashval = tdb_hash(tdbp->tdb_spi, &tdbp->tdb_dst,
hashval = tdb_hash(0, &tdbp->tdb_dst, tdbp->tdb_sproto);
hashval = tdb_hash(0, &tdbp->tdb_src, tdbp->tdb_sproto);
hashval = tdb_hash(tdbp->tdb_spi, &tdbp->tdb_dst, tdbp->tdb_sproto);
hashval = tdb_hash(tdbp->tdb_spi, &tdbp->tdb_dst,
hashval = tdb_hash(0, &tdbp->tdb_dst, tdbp->tdb_sproto);
hashval = tdb_hash(0, &tdbp->tdb_src, tdbp->tdb_sproto);
hashval = tdb_hash(tdbp->tdb_spi, &tdbp->tdb_dst, tdbp->tdb_sproto);
hashval = tdb_hash(0, &tdbp->tdb_dst, tdbp->tdb_sproto);
hashval = tdb_hash(0, &tdbp->tdb_src, tdbp->tdb_sproto);