From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52A34C432C0 for ; Mon, 18 Nov 2019 21:50:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 304E8222DC for ; Mon, 18 Nov 2019 21:50:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727092AbfKRVtb (ORCPT ); Mon, 18 Nov 2019 16:49:31 -0500 Received: from correo.us.es ([193.147.175.20]:45696 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727016AbfKRVta (ORCPT ); Mon, 18 Nov 2019 16:49:30 -0500 Received: from antivirus1-rhel7.int (unknown [192.168.2.11]) by mail.us.es (Postfix) with ESMTP id 81B12EB48C for ; Mon, 18 Nov 2019 22:49:26 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 745C3B7FFB for ; Mon, 18 Nov 2019 22:49:26 +0100 (CET) Received: by antivirus1-rhel7.int (Postfix, from userid 99) id 6A0A7B7FF2; Mon, 18 Nov 2019 22:49:26 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 9D0AED1DBB; Mon, 18 Nov 2019 22:49:21 +0100 (CET) Received: from 192.168.1.97 (192.168.1.97) by antivirus1-rhel7.int (F-Secure/fsigk_smtp/550/antivirus1-rhel7.int); Mon, 18 Nov 2019 22:49:21 +0100 (CET) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/antivirus1-rhel7.int) Received: from salvia.here (sys.soleta.eu [212.170.55.40]) (Authenticated sender: pneira@us.es) by entrada.int (Postfix) with ESMTPA id 6D2C442EE38F; Mon, 18 Nov 2019 22:49:21 +0100 (CET) X-SMTPAUTHUS: auth mail.us.es From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Cc: davem@davemloft.net, netdev@vger.kernel.org Subject: [PATCH 01/18] netfilter: ipset: Add wildcard support to net,iface Date: Mon, 18 Nov 2019 22:48:57 +0100 Message-Id: <20191118214914.142794-2-pablo@netfilter.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20191118214914.142794-1-pablo@netfilter.org> References: <20191118214914.142794-1-pablo@netfilter.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org From: Kristian Evensen The net,iface equal functions currently compares the full interface names. In several cases, wildcard (or prefix) matching is useful. For example, when converting a large iptables rule-set to make use of ipset, I was able to significantly reduce the number of set elements by making use of wildcard matching. Wildcard matching is enabled by adding "wildcard" when adding an element to a set. Internally, this causes the IPSET_FLAG_IFACE_WILDCARD-flag to be set. When this flag is set, only the initial part of the interface name is used for comparison. Wildcard matching is done per element and not per set, as there are many cases where mixing wildcard and non-wildcard elements are useful. This means that is up to the user to handle (avoid) overlapping interface names. Signed-off-by: Kristian Evensen Signed-off-by: Jozsef Kadlecsik --- include/uapi/linux/netfilter/ipset/ip_set.h | 2 ++ net/netfilter/ipset/ip_set_hash_netiface.c | 23 ++++++++++++++++++----- 2 files changed, 20 insertions(+), 5 deletions(-) diff --git a/include/uapi/linux/netfilter/ipset/ip_set.h b/include/uapi/linux/netfilter/ipset/ip_set.h index eea166c52c36..11a72a938eb1 100644 --- a/include/uapi/linux/netfilter/ipset/ip_set.h +++ b/include/uapi/linux/netfilter/ipset/ip_set.h @@ -205,6 +205,8 @@ enum ipset_cadt_flags { IPSET_FLAG_WITH_FORCEADD = (1 << IPSET_FLAG_BIT_WITH_FORCEADD), IPSET_FLAG_BIT_WITH_SKBINFO = 6, IPSET_FLAG_WITH_SKBINFO = (1 << IPSET_FLAG_BIT_WITH_SKBINFO), + IPSET_FLAG_BIT_IFACE_WILDCARD = 7, + IPSET_FLAG_IFACE_WILDCARD = (1 << IPSET_FLAG_BIT_IFACE_WILDCARD), IPSET_FLAG_CADT_MAX = 15, }; diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c index 1a04e0929738..be5e95a0d876 100644 --- a/net/netfilter/ipset/ip_set_hash_netiface.c +++ b/net/netfilter/ipset/ip_set_hash_netiface.c @@ -25,7 +25,8 @@ /* 3 Counters support added */ /* 4 Comments support added */ /* 5 Forceadd support added */ -#define IPSET_TYPE_REV_MAX 6 /* skbinfo support added */ +/* 6 skbinfo support added */ +#define IPSET_TYPE_REV_MAX 7 /* interface wildcard support added */ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Jozsef Kadlecsik "); @@ -57,6 +58,7 @@ struct hash_netiface4_elem { u8 cidr; u8 nomatch; u8 elem; + u8 wildcard; char iface[IFNAMSIZ]; }; @@ -71,7 +73,9 @@ hash_netiface4_data_equal(const struct hash_netiface4_elem *ip1, ip1->cidr == ip2->cidr && (++*multi) && ip1->physdev == ip2->physdev && - strcmp(ip1->iface, ip2->iface) == 0; + (ip1->wildcard ? + strncmp(ip1->iface, ip2->iface, strlen(ip1->iface)) == 0 : + strcmp(ip1->iface, ip2->iface) == 0); } static int @@ -103,7 +107,8 @@ static bool hash_netiface4_data_list(struct sk_buff *skb, const struct hash_netiface4_elem *data) { - u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0; + u32 flags = (data->physdev ? IPSET_FLAG_PHYSDEV : 0) | + (data->wildcard ? IPSET_FLAG_IFACE_WILDCARD : 0); if (data->nomatch) flags |= IPSET_FLAG_NOMATCH; @@ -229,6 +234,8 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[], e.physdev = 1; if (cadt_flags & IPSET_FLAG_NOMATCH) flags |= (IPSET_FLAG_NOMATCH << 16); + if (cadt_flags & IPSET_FLAG_IFACE_WILDCARD) + e.wildcard = 1; } if (adt == IPSET_TEST || !tb[IPSET_ATTR_IP_TO]) { e.ip = htonl(ip & ip_set_hostmask(e.cidr)); @@ -280,6 +287,7 @@ struct hash_netiface6_elem { u8 cidr; u8 nomatch; u8 elem; + u8 wildcard; char iface[IFNAMSIZ]; }; @@ -294,7 +302,9 @@ hash_netiface6_data_equal(const struct hash_netiface6_elem *ip1, ip1->cidr == ip2->cidr && (++*multi) && ip1->physdev == ip2->physdev && - strcmp(ip1->iface, ip2->iface) == 0; + (ip1->wildcard ? + strncmp(ip1->iface, ip2->iface, strlen(ip1->iface)) == 0 : + strcmp(ip1->iface, ip2->iface) == 0); } static int @@ -326,7 +336,8 @@ static bool hash_netiface6_data_list(struct sk_buff *skb, const struct hash_netiface6_elem *data) { - u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0; + u32 flags = (data->physdev ? IPSET_FLAG_PHYSDEV : 0) | + (data->wildcard ? IPSET_FLAG_IFACE_WILDCARD : 0); if (data->nomatch) flags |= IPSET_FLAG_NOMATCH; @@ -440,6 +451,8 @@ hash_netiface6_uadt(struct ip_set *set, struct nlattr *tb[], e.physdev = 1; if (cadt_flags & IPSET_FLAG_NOMATCH) flags |= (IPSET_FLAG_NOMATCH << 16); + if (cadt_flags & IPSET_FLAG_IFACE_WILDCARD) + e.wildcard = 1; } ret = adtfn(set, &e, &ext, &ext, flags); -- 2.11.0