diff options
| author | Jeremy Sowden <jeremy@azazel.net> | 2020-01-15 20:05:53 +0000 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-01-16 15:51:59 +0100 |
| commit | 71d6ded3ac496f9a6563752917921b7db0f38a34 (patch) | |
| tree | 536fd41fd550d1d368511120e37f98163024eb7a /net/netfilter | |
| parent | 3f8d9eb032ec76c35344a2453c4c4a0a29805e3f (diff) | |
netfilter: bitwise: add helper for evaluating boolean operations.
Split the code specific to evaluating bitwise boolean operations out
into a separate function. Similar functions will be added later for
shift operations.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nft_bitwise.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/net/netfilter/nft_bitwise.c b/net/netfilter/nft_bitwise.c index d0cc5f753e52..88a91c63f213 100644 --- a/net/netfilter/nft_bitwise.c +++ b/net/netfilter/nft_bitwise.c @@ -24,16 +24,27 @@ struct nft_bitwise { struct nft_data xor; }; +static void nft_bitwise_eval_bool(u32 *dst, const u32 *src, + const struct nft_bitwise *priv) +{ + unsigned int i; + + for (i = 0; i < DIV_ROUND_UP(priv->len, 4); i++) + dst[i] = (src[i] & priv->mask.data[i]) ^ priv->xor.data[i]; +} + void nft_bitwise_eval(const struct nft_expr *expr, struct nft_regs *regs, const struct nft_pktinfo *pkt) { const struct nft_bitwise *priv = nft_expr_priv(expr); const u32 *src = ®s->data[priv->sreg]; u32 *dst = ®s->data[priv->dreg]; - unsigned int i; - for (i = 0; i < DIV_ROUND_UP(priv->len, 4); i++) - dst[i] = (src[i] & priv->mask.data[i]) ^ priv->xor.data[i]; + switch (priv->op) { + case NFT_BITWISE_BOOL: + nft_bitwise_eval_bool(dst, src, priv); + break; + } } static const struct nla_policy nft_bitwise_policy[NFTA_BITWISE_MAX + 1] = { |