static int nft_lookup_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_lookup *priv = nft_expr_priv(expr);
struct nft_set *set;
int err;
if (tb[NFTA_LOOKUP_SET] == NULL ||
tb[NFTA_LOOKUP_SREG] == NULL)
return -EINVAL;
set = nf_tables_set_lookup(ctx->table, tb[NFTA_LOOKUP_SET]);
if (IS_ERR(set))
return PTR_ERR(set);
priv->sreg = ntohl(nla_get_be32(tb[NFTA_LOOKUP_SREG]));
err = nft_validate_input_register(priv->sreg);
if (err < 0)
return err;
if (tb[NFTA_LOOKUP_DREG] != NULL) {
if (!(set->flags & NFT_SET_MAP))
return -EINVAL;
priv->dreg = ntohl(nla_get_be32(tb[NFTA_LOOKUP_DREG]));
err = nft_validate_output_register(priv->dreg);
if (err < 0)
return err;
if (priv->dreg == NFT_REG_VERDICT) {
if (set->dtype != NFT_DATA_VERDICT)
return -EINVAL;
} else if (set->dtype == NFT_DATA_VERDICT)
return -EINVAL;
} else if (set->flags & NFT_SET_MAP)
return -EINVAL;
err = nf_tables_bind_set(ctx, set, &priv->binding);
if (err < 0)
return err;
priv->set = set;
return 0;
}
static int nft_lookup_init(const struct nft_ctx *ctx,
const struct nft_expr *expr,
const struct nlattr * const tb[])
{
struct nft_lookup *priv = nft_expr_priv(expr);
u8 genmask = nft_genmask_next(ctx->net);
struct nft_set *set;
u32 flags;
int err;
if (tb[NFTA_LOOKUP_SET] == NULL ||
tb[NFTA_LOOKUP_SREG] == NULL)
return -EINVAL;
set = nf_tables_set_lookup(ctx->table, tb[NFTA_LOOKUP_SET], genmask);
if (IS_ERR(set)) {
if (tb[NFTA_LOOKUP_SET_ID]) {
set = nf_tables_set_lookup_byid(ctx->net,
tb[NFTA_LOOKUP_SET_ID],
genmask);
}
if (IS_ERR(set))
return PTR_ERR(set);
}
if (set->flags & NFT_SET_EVAL)
return -EOPNOTSUPP;
priv->sreg = nft_parse_register(tb[NFTA_LOOKUP_SREG]);
err = nft_validate_register_load(priv->sreg, set->klen);
if (err < 0)
return err;
if (tb[NFTA_LOOKUP_FLAGS]) {
flags = ntohl(nla_get_be32(tb[NFTA_LOOKUP_FLAGS]));
if (flags & ~NFT_LOOKUP_F_INV)
return -EINVAL;
if (flags & NFT_LOOKUP_F_INV) {
if (set->flags & NFT_SET_MAP)
return -EINVAL;
priv->invert = true;
}
}
if (tb[NFTA_LOOKUP_DREG] != NULL) {
if (priv->invert)
return -EINVAL;
if (!(set->flags & NFT_SET_MAP))
return -EINVAL;
priv->dreg = nft_parse_register(tb[NFTA_LOOKUP_DREG]);
err = nft_validate_register_store(ctx, priv->dreg, NULL,
set->dtype, set->dlen);
if (err < 0)
return err;
} else if (set->flags & NFT_SET_MAP)
return -EINVAL;
priv->binding.flags = set->flags & NFT_SET_MAP;
err = nf_tables_bind_set(ctx, set, &priv->binding);
if (err < 0)
return err;
priv->set = set;
return 0;
}
