From patchwork Fri Nov 12 03:11:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 12616049 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC9CDC433EF for ; Fri, 12 Nov 2021 03:22:37 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 84FF160E52 for ; Fri, 12 Nov 2021 03:22:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 84FF160E52 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:48102 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mlN9A-0000c4-HP for qemu-devel@archiver.kernel.org; Thu, 11 Nov 2021 22:22:36 -0500 Received: from eggs.gnu.org ([209.51.188.92]:37652) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlN8D-0006Kf-ND for qemu-devel@nongnu.org; Thu, 11 Nov 2021 22:21:37 -0500 Received: from mga03.intel.com ([134.134.136.65]:4409) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mlN8B-0005U8-G6 for qemu-devel@nongnu.org; Thu, 11 Nov 2021 22:21:37 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10165"; a="233009118" X-IronPort-AV: E=Sophos;i="5.87,227,1631602800"; d="scan'208";a="233009118" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2021 19:21:34 -0800 X-IronPort-AV: E=Sophos;i="5.87,227,1631602800"; d="scan'208";a="504711499" Received: from unknown (HELO localhost.localdomain) ([10.239.13.19]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2021 19:21:32 -0800 From: Zhang Chen To: Jason Wang , Markus Armbruster , "Dr. David Alan Gilbert" , =?utf-8?q?Daniel_P=2E_Berra?= =?utf-8?q?ng=C3=A9?= , Eric Blake Subject: [PATCH for 7.0 V10 6/6] net/net.c: Add handler for passthrough filter command Date: Fri, 12 Nov 2021 11:11:12 +0800 Message-Id: <20211112031112.9303-7-chen.zhang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211112031112.9303-1-chen.zhang@intel.com> References: <20211112031112.9303-1-chen.zhang@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.65; envelope-from=chen.zhang@intel.com; helo=mga03.intel.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhang Chen , qemu-dev , Li Zhijian Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Use the connection protocol,src port,dst port,src ip,dst ip as the key to passthrough certain network traffic in object with network packet processing function. Signed-off-by: Zhang Chen --- net/net.c | 199 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 197 insertions(+), 2 deletions(-) diff --git a/net/net.c b/net/net.c index 5d0d5914fb..443e88d396 100644 --- a/net/net.c +++ b/net/net.c @@ -55,6 +55,8 @@ #include "net/colo-compare.h" #include "net/filter.h" #include "qapi/string-output-visitor.h" +#include "net/colo-compare.h" +#include "qom/object_interfaces.h" /* Net bridge is currently not supported for W32. */ #if !defined(_WIN32) @@ -1215,14 +1217,207 @@ void qmp_netdev_del(const char *id, Error **errp) } } +static int check_addr(InetSocketAddressBase *addr) +{ + if (!addr || (addr->host && !qemu_isdigit(addr->host[0]))) { + return -1; + } + + if (atoi(addr->port) > 65536 || atoi(addr->port) < 0) { + return -1; + } + + return 0; +} + +/* The initial version only supports colo-compare */ +static CompareState *passthrough_filter_check(IPFlowSpec *spec, Error **errp) +{ + Object *container; + Object *obj; + CompareState *s; + + if (!spec->object_name) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "object-name", + "Need input object name"); + return NULL; + } + + container = object_get_objects_root(); + obj = object_resolve_path_component(container, spec->object_name); + if (!obj) { + error_setg(errp, "object '%s' not found", spec->object_name); + return NULL; + } + + s = COLO_COMPARE(obj); + + if (!getprotobyname(spec->protocol)) { + error_setg(errp, "Passthrough filter get wrong protocol"); + return NULL; + } + + if (spec->source) { + if (check_addr(spec->source)) { + error_setg(errp, "Passthrough filter get wrong source"); + return NULL; + } + } + + if (spec->destination) { + if (check_addr(spec->destination)) { + error_setg(errp, "Passthrough filter get wrong destination"); + return NULL; + } + } + + return s; +} + +/* The initial version only supports colo-compare */ +static COLOPassthroughEntry *passthrough_filter_find(CompareState *s, + COLOPassthroughEntry *ent) +{ + COLOPassthroughEntry *next = NULL, *origin = NULL; + + if (!QLIST_EMPTY(&s->passthroughlist)) { + QLIST_FOREACH_SAFE(origin, &s->passthroughlist, node, next) { + if ((ent->l4_protocol.p_proto == origin->l4_protocol.p_proto) && + (ent->src_port == origin->src_port) && + (ent->dst_port == origin->dst_port) && + (ent->src_ip.s_addr == origin->src_ip.s_addr) && + (ent->dst_ip.s_addr == origin->dst_ip.s_addr)) { + return origin; + } + } + } + + return NULL; +} + +/* The initial version only supports colo-compare */ +static void passthrough_filter_add(CompareState *s, + IPFlowSpec *spec, + Error **errp) +{ + COLOPassthroughEntry *pass = NULL; + + pass = g_new0(COLOPassthroughEntry, 1); + + if (spec->protocol) { + memcpy(&pass->l4_protocol, getprotobyname(spec->protocol), + sizeof(struct protoent)); + } + + if (spec->source) { + if (!inet_aton(spec->source->host, &pass->src_ip)) { + pass->src_ip.s_addr = 0; + } + + pass->src_port = atoi(spec->source->port); + } + + if (spec->destination) { + if (!inet_aton(spec->destination->host, &pass->dst_ip)) { + pass->dst_ip.s_addr = 0; + } + + pass->dst_port = atoi(spec->destination->port); + } + + qemu_mutex_lock(&s->passthroughlist_mutex); + if (passthrough_filter_find(s, pass)) { + error_setg(errp, "The pass through connection already exists"); + g_free(pass); + qemu_mutex_unlock(&s->passthroughlist_mutex); + return; + } + + QLIST_INSERT_HEAD(&s->passthroughlist, pass, node); + qemu_mutex_unlock(&s->passthroughlist_mutex); +} + +/* The initial version only supports colo-compare */ +static void passthrough_filter_del(CompareState *s, + IPFlowSpec *spec, + Error **errp) +{ + COLOPassthroughEntry *pass = NULL, *result = NULL; + + pass = g_new0(COLOPassthroughEntry, 1); + + if (spec->protocol) { + memcpy(&pass->l4_protocol, getprotobyname(spec->protocol), + sizeof(struct protoent)); + } + + if (spec->source) { + if (!inet_aton(spec->source->host, &pass->src_ip)) { + pass->src_ip.s_addr = 0; + } + + pass->src_port = atoi(spec->source->port); + } + + if (spec->destination) { + if (!inet_aton(spec->destination->host, &pass->dst_ip)) { + pass->dst_ip.s_addr = 0; + } + + pass->dst_port = atoi(spec->destination->port); + } + + qemu_mutex_lock(&s->passthroughlist_mutex); + + result = passthrough_filter_find(s, pass); + if (result) { + QLIST_REMOVE(result, node); + g_free(result); + } else { + error_setg(errp, "Can't find the IP flow Spec"); + } + + g_free(pass); + g_free(spec); + qemu_mutex_unlock(&s->passthroughlist_mutex); +} + +/* The initial version only supports colo-compare */ void qmp_passthrough_filter_add(IPFlowSpec *spec, Error **errp) { - /* TODO implement setup passthrough rule */ + CompareState *s; + Error *err = NULL; + + s = passthrough_filter_check(spec, &err); + if (err) { + error_propagate(errp, err); + return; + } + + passthrough_filter_add(s, spec, &err); + if (err) { + error_propagate(errp, err); + return; + } } +/* The initial version only supports colo-compare */ void qmp_passthrough_filter_del(IPFlowSpec *spec, Error **errp) { - /* TODO implement delete passthrough rule */ + CompareState *s; + Error *err = NULL; + + s = passthrough_filter_check(spec, &err); + if (err) { + error_propagate(errp, err); + return; + } + + passthrough_filter_del(s, spec, &err); + if (err) { + error_propagate(errp, err); + return; + } } static void netfilter_print_info(Monitor *mon, NetFilterState *nf)