netfilter: nf_tables: add register parsing/dumping helpers
Add helper functions to parse and dump register values in netlink attributes.
These helpers will later be changed to take care of translation between the
old 128 bit and the new 32 bit register numbers.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/netfilter/nft_byteorder.c b/net/netfilter/nft_byteorder.c
index d6290db..2ee3e57 100644
--- a/net/netfilter/nft_byteorder.c
+++ b/net/netfilter/nft_byteorder.c
@@ -106,13 +106,13 @@
return -EINVAL;
}
- priv->sreg = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_SREG]));
+ priv->sreg = nft_parse_register(tb[NFTA_BYTEORDER_SREG]);
priv->len = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_LEN]));
err = nft_validate_register_load(priv->sreg, priv->len);
if (err < 0)
return err;
- priv->dreg = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_DREG]));
+ priv->dreg = nft_parse_register(tb[NFTA_BYTEORDER_DREG]);
return nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, priv->len);
}
@@ -121,9 +121,9 @@
{
const struct nft_byteorder *priv = nft_expr_priv(expr);
- if (nla_put_be32(skb, NFTA_BYTEORDER_SREG, htonl(priv->sreg)))
+ if (nft_dump_register(skb, NFTA_BYTEORDER_SREG, priv->sreg))
goto nla_put_failure;
- if (nla_put_be32(skb, NFTA_BYTEORDER_DREG, htonl(priv->dreg)))
+ if (nft_dump_register(skb, NFTA_BYTEORDER_DREG, priv->dreg))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_BYTEORDER_OP, htonl(priv->op)))
goto nla_put_failure;