diff options
| author |   Liping Zhang <zlpnobody@gmail.com> | 2016-12-25 19:58:59 +0800 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2017-01-03 14:33:26 +0100 |
| commit | 949a358418aae397d7cf1622aa6515eca766b9e7 (patch) | |
| tree | 9b67c64eb688d91983115627063d4f77e90c27b5 /net/netfilter/nft_ct.c | |
| parent | netfilter: nf_tables: add missing descriptions in nft_ct_keys (diff) | |
| download | linux-dev-949a358418aae397d7cf1622aa6515eca766b9e7.tar.xz linux-dev-949a358418aae397d7cf1622aa6515eca766b9e7.zip | |
netfilter: nft_ct: add average bytes per packet support
Similar to xt_connbytes, user can match how many average bytes per packet
a connection has transferred so far.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nft_ct.c')
| -rw-r--r-- | net/netfilter/nft_ct.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c index e6baeaebe653..d774d7823688 100644 --- a/net/netfilter/nft_ct.c +++ b/net/netfilter/nft_ct.c @@ -129,6 +129,22 @@ static void nft_ct_get_eval(const struct nft_expr *expr, memcpy(dest, &count, sizeof(count)); return; } + case NFT_CT_AVGPKT: { + const struct nf_conn_acct *acct = nf_conn_acct_find(ct); + u64 avgcnt = 0, bcnt = 0, pcnt = 0; + + if (acct) { + pcnt = nft_ct_get_eval_counter(acct->counter, + NFT_CT_PKTS, priv->dir); + bcnt = nft_ct_get_eval_counter(acct->counter, + NFT_CT_BYTES, priv->dir); + if (pcnt != 0) + avgcnt = div64_u64(bcnt, pcnt); + } + + memcpy(dest, &avgcnt, sizeof(avgcnt)); + return; + } case NFT_CT_L3PROTOCOL: *dest = nf_ct_l3num(ct); return; @@ -316,6 +332,7 @@ static int nft_ct_get_init(const struct nft_ctx *ctx, break; case NFT_CT_BYTES: case NFT_CT_PKTS: + case NFT_CT_AVGPKT: /* no direction? return sum of original + reply */ if (tb[NFTA_CT_DIRECTION] == NULL) priv->dir = IP_CT_DIR_MAX; @@ -346,7 +363,9 @@ static int nft_ct_get_init(const struct nft_ctx *ctx, if (err < 0) return err; - if (priv->key == NFT_CT_BYTES || priv->key == NFT_CT_PKTS) + if (priv->key == NFT_CT_BYTES || + priv->key == NFT_CT_PKTS || + priv->key == NFT_CT_AVGPKT) nf_ct_set_acct(ctx->net, true); return 0; @@ -445,6 +464,7 @@ static int nft_ct_get_dump(struct sk_buff *skb, const struct nft_expr *expr) break; case NFT_CT_BYTES: case NFT_CT_PKTS: + case NFT_CT_AVGPKT: if (priv->dir < IP_CT_DIR_MAX && nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir)) goto nla_put_failure; |