From patchwork Sun Oct 13 18:54:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Woudstra X-Patchwork-Id: 13833537 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 22581CF2579 for ; Sun, 13 Oct 2024 18:59:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=pfUb9HJ+s1GLLmxcujXBQ1+8qs5ZhQwuVS6uJsoTo/c=; b=YdLlamKFLYml19bXRiQVsck1hO OS9NBWX/AHZwTrqVVBWGH9DcGK5902ItUFhPClGdR9TNlaksZhxSBchTbIK4mWrcdlctIkGFvOOgF oKh8N9+U0VyjmmKCHNpxemvywkPA++q9F12THN2z2lcuqEf5XbbzYyokNWVYLhFksC0F7Rsk6kCyh cvNSfdo6C/fIkHndgxoDJ+GcNZfRYaGQIg/h6m2tchoj696Bt38vNBhrhyTcBHaw7XXjU9it6jdLH Dg5tgAF/pZ8kR2fOXM0xtmLvPr1l0zb7r19iBArnAub/qXyG211VyKB3utDyPvqr9ydO/Y9lNlHVX qzBq224A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t03oh-000000035VL-4BTb; Sun, 13 Oct 2024 18:59:48 +0000 Received: from mail-ej1-x62a.google.com ([2a00:1450:4864:20::62a]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t03kd-000000034Y8-45vG; Sun, 13 Oct 2024 18:55:37 +0000 Received: by mail-ej1-x62a.google.com with SMTP id a640c23a62f3a-a994cd82a3bso529004166b.2; Sun, 13 Oct 2024 11:55:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1728845734; x=1729450534; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=pfUb9HJ+s1GLLmxcujXBQ1+8qs5ZhQwuVS6uJsoTo/c=; b=KIzX0WpKhF5fxODZyuF//67Sw+AB8xNI1E71a5KEx29oGQqwBxkZ8m91nwggj0Y2UP vGsrvdOe059ivc1feiHpr2mEOx/gsZxkmLQkfDu/MJLrqbAeT1aeCIUbiTZSn/qsF80m rJxy/tSrTi60kDIn7R3ZQZ/DmHmCqzn5ghMwX3AQkRC8v9rOqvsQwfhFr2wFMhbTZR8f lJsJKCgc3spMdren1Aj4Mg2D2EYvkGxEPmmvbvYF8YpojHpopmYvSHHZ23uxvJyIdvLq fcpZWY20cPYOAFgle2EJb9x6Lh9gnhDavp6RJoOfNXmbpeLS5WOz3++uTBJ/aa8PsMVe Besg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728845734; x=1729450534; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=pfUb9HJ+s1GLLmxcujXBQ1+8qs5ZhQwuVS6uJsoTo/c=; b=D68ucnzuKoQ82zndnzcEKIVvQZk6utdiMxrAi101wLUHhsjaY4qNfvzYypIEH4lSPT uoT2to1+1RmI/B66/1rHH5OlowKd1ybV3l2M50r9wJTLsNiP7nc9qItfkrwHxKlBsiQA FhKOjtD8C/9FYMx8w+hmtfsjSh1YlFMkDDGZsDv2J4yFBCwgvcQygNcC/lGjmHehf8tp c7jC+6lGN1jLFkAn/3oTlG1krqVDZgCQnIYtCCW5Qi5Jam2TiwXMGe1nw/Ml3bDHL33j DBTYY7EReJeww8OsPOWdZ+R8zYhSKWEDR3Xsj6IKwg+ixJSzDUtLu99PAt7aPHAyrk+D MNBQ== X-Forwarded-Encrypted: i=1; AJvYcCUMiVBDZAVhRxTUA8Aq1hDr0GlLgunYW4rj8/7olBW7WmPak287M8s340YZ3pY8a7TniArJRZpZPsjeQ9qBW6DS@lists.infradead.org, AJvYcCWAzfZi9pLEnk0itIfP0wRlsG0CIziS3u2vLUX1GWCBFYX/48r9zq0QytFKCEj69MrZzuxuMiVINPSh2OuU2Y8=@lists.infradead.org X-Gm-Message-State: AOJu0YxHIsQGV/k4N6fJAXNA45bQCHr2xTxYuOayZusahnvO/PEUQ1Aq soNbX5pqxJeCF5gm0CXxeq/bhD2laZuaNKuaiwMxtF7t+P9x/YHW X-Google-Smtp-Source: AGHT+IH+8DzpaIYRj4WDn5wY606h6B8yn6VPFaENvcSZa4TDlxRT2Jmn8BI4I5TivbHspBA60sKu/Q== X-Received: by 2002:a17:907:6d14:b0:a8d:5472:b591 with SMTP id a640c23a62f3a-a99b93a86b0mr765431566b.5.1728845734027; Sun, 13 Oct 2024 11:55:34 -0700 (PDT) Received: from corebook.localdomain (2001-1c00-020d-1300-1b1c-4449-176a-89ea.cable.dynamic.v6.ziggo.nl. [2001:1c00:20d:1300:1b1c:4449:176a:89ea]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9a12d384b9sm13500866b.172.2024.10.13.11.55.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Oct 2024 11:55:33 -0700 (PDT) From: Eric Woudstra To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Pablo Neira Ayuso , Jozsef Kadlecsik , Roopa Prabhu , Nikolay Aleksandrov , Matthias Brugger , AngeloGioacchino Del Regno , Jiri Pirko , Sebastian Andrzej Siewior , Lorenzo Bianconi , "Frank Wunderlich" , Daniel Golle , Eric Woudstra Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, bridge@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH RFC v1 net-next 02/12] netfilter: bridge: Add conntrack double vlan and pppoe Date: Sun, 13 Oct 2024 20:54:58 +0200 Message-ID: <20241013185509.4430-3-ericwouds@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241013185509.4430-1-ericwouds@gmail.com> References: <20241013185509.4430-1-ericwouds@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241013_115536_036022_200E12D0 X-CRM114-Status: GOOD ( 13.47 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org This adds the capability to conntrack 802.1ad, QinQ, PPPoE and PPPoE-in-Q packets that are passing a bridge. Signed-off-by: Eric Woudstra Signed-off-by: Vladimir Oltean --- net/bridge/netfilter/nf_conntrack_bridge.c | 86 ++++++++++++++++++---- 1 file changed, 73 insertions(+), 13 deletions(-) diff --git a/net/bridge/netfilter/nf_conntrack_bridge.c b/net/bridge/netfilter/nf_conntrack_bridge.c index 816bb0fde718..fb2f79396aa0 100644 --- a/net/bridge/netfilter/nf_conntrack_bridge.c +++ b/net/bridge/netfilter/nf_conntrack_bridge.c @@ -241,56 +241,116 @@ static unsigned int nf_ct_bridge_pre(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nf_hook_state bridge_state = *state; + __be16 outer_proto, inner_proto; enum ip_conntrack_info ctinfo; + int ret, offset = 0; struct nf_conn *ct; - u32 len; - int ret; + u32 len, data_len; ct = nf_ct_get(skb, &ctinfo); if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED) return NF_ACCEPT; + switch (skb->protocol) { + case htons(ETH_P_PPP_SES): + struct ppp_hdr { + struct pppoe_hdr hdr; + __be16 proto; + } *ph = (struct ppp_hdr *)(skb->data); + + data_len = ntohs(ph->hdr.length) - 2; + offset = PPPOE_SES_HLEN; + outer_proto = skb->protocol; + switch (ph->proto) { + case htons(PPP_IP): + inner_proto = htons(ETH_P_IP); + break; + case htons(PPP_IPV6): + inner_proto = htons(ETH_P_IPV6); + break; + default: + return NF_ACCEPT; + } + break; + case htons(ETH_P_8021Q): + struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data); + + data_len = 0xffffffff; + offset = VLAN_HLEN; + outer_proto = skb->protocol; + inner_proto = vhdr->h_vlan_encapsulated_proto; + break; + default: + data_len = 0xffffffff; + break; + } + + if (offset) { + switch (inner_proto) { + case htons(ETH_P_IP): + case htons(ETH_P_IPV6): + if (!pskb_may_pull(skb, offset)) + return NF_ACCEPT; + skb_pull_rcsum(skb, offset); + skb_reset_network_header(skb); + skb->protocol = inner_proto; + break; + default: + return NF_ACCEPT; + } + } + + ret = NF_ACCEPT; switch (skb->protocol) { case htons(ETH_P_IP): if (!pskb_may_pull(skb, sizeof(struct iphdr))) - return NF_ACCEPT; + goto do_not_track; len = skb_ip_totlen(skb); + if (data_len < len) + len = data_len; if (pskb_trim_rcsum(skb, len)) - return NF_ACCEPT; + goto do_not_track; if (nf_ct_br_ip_check(skb)) - return NF_ACCEPT; + goto do_not_track; bridge_state.pf = NFPROTO_IPV4; ret = nf_ct_br_defrag4(skb, &bridge_state); break; case htons(ETH_P_IPV6): if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) - return NF_ACCEPT; + goto do_not_track; len = sizeof(struct ipv6hdr) + ntohs(ipv6_hdr(skb)->payload_len); + if (data_len < len) + len = data_len; if (pskb_trim_rcsum(skb, len)) - return NF_ACCEPT; + goto do_not_track; if (nf_ct_br_ipv6_check(skb)) - return NF_ACCEPT; + goto do_not_track; bridge_state.pf = NFPROTO_IPV6; ret = nf_ct_br_defrag6(skb, &bridge_state); break; default: nf_ct_set(skb, NULL, IP_CT_UNTRACKED); - return NF_ACCEPT; + goto do_not_track; } - if (ret != NF_ACCEPT) - return ret; + if (ret == NF_ACCEPT) + ret = nf_conntrack_in(skb, &bridge_state); - return nf_conntrack_in(skb, &bridge_state); +do_not_track: + if (offset) { + skb_push_rcsum(skb, offset); + skb_reset_network_header(skb); + skb->protocol = outer_proto; + } + return ret; } - static unsigned int nf_ct_bridge_in(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) {