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_ct.c b/net/netfilter/nft_ct.c
index 0166f28c..fab8e75 100644
--- a/net/netfilter/nft_ct.c
+++ b/net/netfilter/nft_ct.c
@@ -306,7 +306,7 @@
}
}
- priv->dreg = ntohl(nla_get_be32(tb[NFTA_CT_DREG]));
+ priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]);
err = nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, len);
if (err < 0)
@@ -338,7 +338,7 @@
return -EOPNOTSUPP;
}
- priv->sreg = ntohl(nla_get_be32(tb[NFTA_CT_SREG]));
+ priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]);
err = nft_validate_register_load(priv->sreg, len);
if (err < 0)
return err;
@@ -360,7 +360,7 @@
{
const struct nft_ct *priv = nft_expr_priv(expr);
- if (nla_put_be32(skb, NFTA_CT_DREG, htonl(priv->dreg)))
+ if (nft_dump_register(skb, NFTA_CT_DREG, priv->dreg))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
goto nla_put_failure;
@@ -387,7 +387,7 @@
{
const struct nft_ct *priv = nft_expr_priv(expr);
- if (nla_put_be32(skb, NFTA_CT_SREG, htonl(priv->sreg)))
+ if (nft_dump_register(skb, NFTA_CT_SREG, priv->sreg))
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
goto nla_put_failure;