From patchwork Wed Oct 5 16:20:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 12999470 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 51FCFC433F5 for ; Wed, 5 Oct 2022 16:41:13 +0000 (UTC) Received: from localhost ([::1]:40452 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1og7SK-0000rQ-BZ for qemu-devel@archiver.kernel.org; Wed, 05 Oct 2022 12:41:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46940) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1og796-0007SM-33 for qemu-devel@nongnu.org; Wed, 05 Oct 2022 12:21:20 -0400 Received: from mout.kundenserver.de ([217.72.192.73]:40995) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1og791-0002pC-2z for qemu-devel@nongnu.org; Wed, 05 Oct 2022 12:21:19 -0400 Received: from lenovo-t14s.redhat.com ([82.142.8.70]) by mrelayeu.kundenserver.de (mreue109 [212.227.15.183]) with ESMTPSA (Nemesis) id 1MjSHc-1p4gBT4AZe-00kxPs; Wed, 05 Oct 2022 18:21:10 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Cc: Thomas Huth , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eric Blake , "Dr. David Alan Gilbert" , David Gibson , Jason Wang , Samuel Thibault , Markus Armbruster , Paolo Bonzini , Stefan Weil , Greg Kurz , Laurent Vivier , "Michael S. Tsirkin" , Stefano Brivio Subject: [PATCH v10 12/17] net: dgram: add unix socket Date: Wed, 5 Oct 2022 18:20:46 +0200 Message-Id: <20221005162051.1120041-13-lvivier@redhat.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221005162051.1120041-1-lvivier@redhat.com> References: <20221005162051.1120041-1-lvivier@redhat.com> MIME-Version: 1.0 X-Provags-ID: V03:K1:9mW5BjYZsTrgrCThoia1OPKqH2KDGXaDKQlaJZ4BEWNkWh5yydq 94wyBB2yvRx1r8UVV/oYtHfW1B0IeueDLDj8R84H54pqpOsZcdinrjp5w0KZBlso+FV/Q00 SuKbBV6NF/UpNeoaRi/hWavIfXrvCFdltUXqUTe2R7ylCtxen04+S9f36r2NbOf7sxBkCmW 5jtCUE31V5qM5DlaCApfA== X-UI-Out-Filterresults: notjunk:1;V03:K0:TdT+ES3sRYM=:kV/5ApdlVAx011nCwqeidQ /tKMtccIhWe9p9OnDhbTKCji80gEyej53MFcdAYh4zyjfqW4dwSbye9Ylzdr3ohrKKuAQoqg3 MCoypw885ilOADoK4hSU0lBHGcR+pGJz7tlHpMR/LdESQ9TJRnoqfUPtsPZPs2eZsqVu9kIBh yzl+BegyIhiP8+dbheWBGBgcurzuDeQbXmj56+Ylg+d/SPdb8CEEVB/w+VvbWvc/+YFHUDqEA C/7EZFRQAuwlPLiH/bNT8iSbxv6L0r1MuxVqJSvSec3eLEBBtXxXQVylnqfOKqcjkfEz7+tOQ WrXSwPlc9TIAnKVtJfzcE/SXZisOdLqn8VhZ2uDx80Mj3bynvf6otb0cigdZrmyMU3tBt9LmG LHB1yUD39zB7+vXaS3SWtNqV/T08d3JJyF1Iio+svg+w/U5TgGn04yR5caJ44GWyDC/jIkHsz RSOsS3CwWXUJgTfTCi4d+kDjgsxcHIU2n8VF+M8WhcMLxVBaPzjj64TA0pwiouea50lxtTK94 uxLN1bG121fpuWmE3fykvTfqarCcYXeDz7V51SG6jJvrctE4QD5d4sdKazab26Wt8Q6YvKoLA mlzzUbeNUBx5dSx8ZlTlfGrnSbJh3QVy64fcWNlXwi5A18/UrUmLfyTCnpf4pUrrBbcUEFD8t RwDsbC3xmJJu7SElxd0BRcin0XcgIkoMqxFYy463zsXX/jNJcjTZvYMSIm2TWesMvFDc8Lybd ec+mmmncb0FIbk4osoKxYvVG6UNaMnm2Jk4ZeeqrH3fOHDT56NRazh5InymCupijC5rydPMfe 49pnCp+ Received-SPF: permerror client-ip=217.72.192.73; envelope-from=lvivier@redhat.com; helo=mout.kundenserver.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_FAIL=0.001, SPF_HELO_NONE=0.001 autolearn=no 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Laurent Vivier Reviewed-by: Stefano Brivio Reviewed-by: David Gibson --- net/dgram.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++- qapi/net.json | 2 +- qemu-options.hx | 1 + 3 files changed, 55 insertions(+), 2 deletions(-) diff --git a/net/dgram.c b/net/dgram.c index e581cc62f39f..02a189e36358 100644 --- a/net/dgram.c +++ b/net/dgram.c @@ -426,6 +426,7 @@ int net_init_dgram(const Netdev *netdev, const char *name, SocketAddress *remote, *local; struct sockaddr *dest_addr; struct sockaddr_in laddr_in, raddr_in; + struct sockaddr_un laddr_un, raddr_un; socklen_t dest_len; assert(netdev->type == NET_CLIENT_DRIVER_DGRAM); @@ -465,7 +466,7 @@ int net_init_dgram(const Netdev *netdev, const char *name, } } else { if (local->type != SOCKET_ADDRESS_TYPE_FD) { - error_setg(errp, "type=inet requires remote parameter"); + error_setg(errp, "type=inet or unix require remote parameter"); return -1; } } @@ -508,6 +509,53 @@ int net_init_dgram(const Netdev *netdev, const char *name, dest_addr = g_malloc(dest_len); memcpy(dest_addr, &raddr_in, dest_len); break; + case SOCKET_ADDRESS_TYPE_UNIX: + ret = unlink(local->u.q_unix.path); + if (ret < 0 && errno != ENOENT) { + error_setg_errno(errp, errno, "failed to unlink socket %s", + local->u.q_unix.path); + return -1; + } + + laddr_un.sun_family = PF_UNIX; + ret = snprintf(laddr_un.sun_path, sizeof(laddr_un.sun_path), "%s", + local->u.q_unix.path); + if (ret < 0 || ret >= sizeof(laddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + local->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(laddr_un.sun_path)); + } + + raddr_un.sun_family = PF_UNIX; + ret = snprintf(raddr_un.sun_path, sizeof(raddr_un.sun_path), "%s", + remote->u.q_unix.path); + if (ret < 0 || ret >= sizeof(raddr_un.sun_path)) { + error_setg(errp, "UNIX socket path '%s' is too long", + remote->u.q_unix.path); + error_append_hint(errp, "Path must be less than %zu bytes\n", + sizeof(raddr_un.sun_path)); + } + + fd = qemu_socket(PF_UNIX, SOCK_DGRAM, 0); + if (fd < 0) { + error_setg_errno(errp, errno, "can't create datagram socket"); + return -1; + } + + ret = bind(fd, (struct sockaddr *)&laddr_un, sizeof(laddr_un)); + if (ret < 0) { + error_setg_errno(errp, errno, "can't bind unix=%s to socket", + laddr_un.sun_path); + closesocket(fd); + return -1; + } + qemu_socket_set_nonblock(fd); + + dest_len = sizeof(raddr_un); + dest_addr = g_malloc(dest_len); + memcpy(dest_addr, &raddr_un, dest_len); + break; case SOCKET_ADDRESS_TYPE_FD: fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp); if (fd == -1) { @@ -546,6 +594,10 @@ int net_init_dgram(const Netdev *netdev, const char *name, inet_ntoa(raddr_in.sin_addr), ntohs(raddr_in.sin_port)); break; + case SOCKET_ADDRESS_TYPE_UNIX: + qemu_set_info_str(&s->nc, "udp=%s:%s", + laddr_un.sun_path, raddr_un.sun_path); + break; case SOCKET_ADDRESS_TYPE_FD: { SocketAddress *sa; SocketAddressType sa_type; diff --git a/qapi/net.json b/qapi/net.json index d8065c335072..14d1531536c5 100644 --- a/qapi/net.json +++ b/qapi/net.json @@ -600,7 +600,7 @@ # @remote: remote address # @local: local address # -# Only SocketAddress types 'inet' and 'fd' are supported. +# Only SocketAddress types 'unix', 'inet' and 'fd' are supported. # # If remote address is present and it's a multicast address, local address # is optional. Otherwise local address is required and remote address is diff --git a/qemu-options.hx b/qemu-options.hx index 95b231095542..1111e02a220c 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2766,6 +2766,7 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, " configure a network backend to connect to a multicast maddr and port\n" " use ``local.host=addr`` to specify the host address to send packets from\n" "-netdev dgram,id=str,local.type=inet,local.host=addr,local.port=port[,remote.type=inet,remote.host=addr,remote.port=port]\n" + "-netdev dgram,id=str,local.type=unix,local.path=path[,remote.type=unix,remote.path=path]\n" "-netdev dgram,id=str,local.type=fd,local.str=file-descriptor\n" " configure a network backend to connect to another network\n" " using an UDP tunnel\n"