diff options
| author | Liping Zhang <zlpnobody@gmail.com> | 2017-04-15 17:22:17 +0800 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-04-15 11:30:08 +0200 |
| commit | e2b25ccc31b8262a0739b46337fbb354e00aa1d6 (patch) | |
| tree | 05db8f700716c22ef19ff6153807a173d17a8821 /src/netlink_delinearize.c | |
| parent | cd3877cd4a7c4943dc29c274366795f02c42feb0 (diff) | |
hash: generate a random seed if seed option is empty
Typing the "nft add rule x y ct mark set jhash ip saddr mod 2" will
not generate a random seed, instead, the seed will always be zero.
So if seed option is empty, we shoulde not set the NFTA_HASH_SEED
attribute, then a random seed will be generated in the kernel.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/netlink_delinearize.c')
| -rw-r--r-- | src/netlink_delinearize.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c index 9ad1e2c6..4a0b8dcc 100644 --- a/src/netlink_delinearize.c +++ b/src/netlink_delinearize.c @@ -525,13 +525,15 @@ static void netlink_parse_hash(struct netlink_parse_ctx *ctx, struct expr *expr, *hexpr; uint32_t mod, seed, len, offset; enum nft_hash_types type; + bool seed_set; type = nftnl_expr_get_u32(nle, NFTNL_EXPR_HASH_TYPE); offset = nftnl_expr_get_u32(nle, NFTNL_EXPR_HASH_OFFSET); + seed_set = nftnl_expr_is_set(nle, NFTNL_EXPR_HASH_SEED); seed = nftnl_expr_get_u32(nle, NFTNL_EXPR_HASH_SEED); mod = nftnl_expr_get_u32(nle, NFTNL_EXPR_HASH_MODULUS); - expr = hash_expr_alloc(loc, mod, seed, offset, type); + expr = hash_expr_alloc(loc, mod, seed_set, seed, offset, type); if (type != NFT_HASH_SYM) { sreg = netlink_parse_register(nle, NFTNL_EXPR_HASH_SREG); |