From patchwork Thu Jul 28 10:12:27 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 9251051 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8EB646077C for ; Thu, 28 Jul 2016 10:13:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 800EF2621F for ; Thu, 28 Jul 2016 10:13:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 74C2A26785; Thu, 28 Jul 2016 10:13:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2EFD226253 for ; Thu, 28 Jul 2016 10:13:29 +0000 (UTC) Received: from localhost ([::1]:52122 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bSiJk-0002wL-4g for patchwork-qemu-devel@patchwork.kernel.org; Thu, 28 Jul 2016 06:13:28 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59575) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bSiJH-0002vS-FW for qemu-devel@nongnu.org; Thu, 28 Jul 2016 06:13:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bSiJD-0000Ls-Vc for qemu-devel@nongnu.org; Thu, 28 Jul 2016 06:12:59 -0400 Received: from [59.151.112.132] (port=52428 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bSiJD-0000Jl-GS for qemu-devel@nongnu.org; Thu, 28 Jul 2016 06:12:55 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="9251078" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 28 Jul 2016 18:12:47 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id A33FA42B5483; Thu, 28 Jul 2016 18:12:48 +0800 (CST) Received: from G08FNSTD140215.g08.fujitsu.local (10.167.226.56) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.279.2; Thu, 28 Jul 2016 18:12:48 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Thu, 28 Jul 2016 18:12:27 +0800 Message-ID: <1469700748-19754-9-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1469700748-19754-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1469700748-19754-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: A33FA42B5483.AC04A X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: zhangchen.fnst@cn.fujitsu.com X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 59.151.112.132 Subject: [Qemu-devel] [PATCH V11 8/9] filter-rewriter: track connection and parse packet X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Li Zhijian , "eddie . dong" , "Dr . David Alan Gilbert" , Zhang Chen , zhanghailiang Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP We use colo-base.h to track connection and parse packet Signed-off-by: Zhang Chen Signed-off-by: Li Zhijian Signed-off-by: Wen Congyang --- net/colo-base.c | 14 ++++++++++++++ net/colo-base.h | 1 + net/filter-rewriter.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 65 insertions(+) diff --git a/net/colo-base.c b/net/colo-base.c index eb1b631..20797b5 100644 --- a/net/colo-base.c +++ b/net/colo-base.c @@ -103,6 +103,20 @@ void fill_connection_key(Packet *pkt, ConnectionKey *key) } } +void reverse_connection_key(ConnectionKey *key) +{ + struct in_addr tmp_ip; + uint16_t tmp_port; + + tmp_ip = key->src; + key->src = key->dst; + key->dst = tmp_ip; + + tmp_port = key->src_port; + key->src_port = key->dst_port; + key->dst_port = tmp_port; +} + Connection *connection_new(ConnectionKey *key) { Connection *conn = g_slice_new(Connection); diff --git a/net/colo-base.h b/net/colo-base.h index 860a148..8d402a3 100644 --- a/net/colo-base.h +++ b/net/colo-base.h @@ -56,6 +56,7 @@ uint32_t connection_key_hash(const void *opaque); int connection_key_equal(const void *opaque1, const void *opaque2); int parse_packet_early(Packet *pkt); void fill_connection_key(Packet *pkt, ConnectionKey *key); +void reverse_connection_key(ConnectionKey *key); Connection *connection_new(ConnectionKey *key); void connection_destroy(void *opaque); Connection *connection_get(GHashTable *connection_track_table, diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c index 3a39f52..6350080 100644 --- a/net/filter-rewriter.c +++ b/net/filter-rewriter.c @@ -51,6 +51,20 @@ static void filter_rewriter_flush(NetFilterState *nf) } } +/* + * Return 1 on success, if return 0 means the pkt + * is not TCP packet + */ +static int is_tcp_packet(Packet *pkt) +{ + if (!parse_packet_early(pkt) && + pkt->ip->ip_p == IPPROTO_TCP) { + return 1; + } else { + return 0; + } +} + static ssize_t colo_rewriter_receive_iov(NetFilterState *nf, NetClientState *sender, unsigned flags, @@ -58,11 +72,47 @@ static ssize_t colo_rewriter_receive_iov(NetFilterState *nf, int iovcnt, NetPacketSent *sent_cb) { + RewriterState *s = FILTER_COLO_REWRITER(nf); + Connection *conn; + ConnectionKey key = {{ 0 } }; + Packet *pkt; + ssize_t size = iov_size(iov, iovcnt); + char *buf = g_malloc0(size); + + iov_to_buf(iov, iovcnt, 0, buf, size); + pkt = packet_new(buf, size); + /* * if we get tcp packet * we will rewrite it to make secondary guest's * connection established successfully */ + if (is_tcp_packet(pkt)) { + + fill_connection_key(pkt, &key); + + if (sender == nf->netdev) { + /* + * We need make tcp TX and RX packet + * into one connection. + */ + reverse_connection_key(&key); + } + conn = connection_get(s->connection_track_table, + &key, + &s->hashtable_size); + + if (sender == nf->netdev) { + /* NET_FILTER_DIRECTION_TX */ + /* handle_primary_tcp_pkt */ + } else { + /* NET_FILTER_DIRECTION_RX */ + /* handle_secondary_tcp_pkt */ + } + } + + packet_destroy(pkt, NULL); + pkt = NULL; return 0; }