From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pablo Neira Ayuso Subject: [PATCH 40/52] netfilter: meta: secpath support Date: Mon, 8 Jan 2018 21:19:48 +0100 Message-ID: <20180108202000.12989-41-pablo@netfilter.org> References: <20180108202000.12989-1-pablo@netfilter.org> Cc: davem@davemloft.net, netdev@vger.kernel.org To: netfilter-devel@vger.kernel.org Return-path: Received: from mail.us.es ([193.147.175.20]:42720 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933386AbeAHUUm (ORCPT ); Mon, 8 Jan 2018 15:20:42 -0500 Received: from antivirus1-rhel7.int (unknown [192.168.2.11]) by mail.us.es (Postfix) with ESMTP id 93AB1E7B8A for ; Mon, 8 Jan 2018 21:20:40 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 85CF6664B for ; Mon, 8 Jan 2018 21:20:40 +0100 (CET) In-Reply-To: <20180108202000.12989-1-pablo@netfilter.org> Sender: netfilter-devel-owner@vger.kernel.org List-ID: From: Florian Westphal replacement for iptables "-m policy --dir in --policy {ipsec,none}". Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- include/uapi/linux/netfilter/nf_tables.h | 2 ++ net/netfilter/nft_meta.c | 43 ++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index a3ee277b17a1..2efbf9744c2a 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -777,6 +777,7 @@ enum nft_exthdr_attributes { * @NFT_META_OIFGROUP: packet output interface group * @NFT_META_CGROUP: socket control group (skb->sk->sk_classid) * @NFT_META_PRANDOM: a 32bit pseudo-random number + * @NFT_META_SECPATH: boolean, secpath_exists (!!skb->sp) */ enum nft_meta_keys { NFT_META_LEN, @@ -804,6 +805,7 @@ enum nft_meta_keys { NFT_META_OIFGROUP, NFT_META_CGROUP, NFT_META_PRANDOM, + NFT_META_SECPATH, }; /** diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c index 5a60eb23a7ed..1a91e676f13e 100644 --- a/net/netfilter/nft_meta.c +++ b/net/netfilter/nft_meta.c @@ -210,6 +210,11 @@ void nft_meta_get_eval(const struct nft_expr *expr, *dest = prandom_u32_state(state); break; } +#ifdef CONFIG_XFRM + case NFT_META_SECPATH: + nft_reg_store8(dest, !!skb->sp); + break; +#endif default: WARN_ON(1); goto err; @@ -308,6 +313,11 @@ int nft_meta_get_init(const struct nft_ctx *ctx, prandom_init_once(&nft_prandom_state); len = sizeof(u32); break; +#ifdef CONFIG_XFRM + case NFT_META_SECPATH: + len = sizeof(u8); + break; +#endif default: return -EOPNOTSUPP; } @@ -318,6 +328,38 @@ int nft_meta_get_init(const struct nft_ctx *ctx, } EXPORT_SYMBOL_GPL(nft_meta_get_init); +static int nft_meta_get_validate(const struct nft_ctx *ctx, + const struct nft_expr *expr, + const struct nft_data **data) +{ +#ifdef CONFIG_XFRM + const struct nft_meta *priv = nft_expr_priv(expr); + unsigned int hooks; + + if (priv->key != NFT_META_SECPATH) + return 0; + + switch (ctx->afi->family) { + case NFPROTO_NETDEV: + hooks = 1 << NF_NETDEV_INGRESS; + break; + case NFPROTO_IPV4: + case NFPROTO_IPV6: + case NFPROTO_INET: + hooks = (1 << NF_INET_PRE_ROUTING) | + (1 << NF_INET_LOCAL_IN) | + (1 << NF_INET_FORWARD); + break; + default: + return -EOPNOTSUPP; + } + + return nft_chain_validate_hooks(ctx->chain, hooks); +#else + return 0; +#endif +} + int nft_meta_set_validate(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nft_data **data) @@ -434,6 +476,7 @@ static const struct nft_expr_ops nft_meta_get_ops = { .eval = nft_meta_get_eval, .init = nft_meta_get_init, .dump = nft_meta_get_dump, + .validate = nft_meta_get_validate, }; static const struct nft_expr_ops nft_meta_set_ops = { -- 2.11.0