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Thu, 20 Feb 2020 15:10:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582211453; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yMcsuqrYa1e/c6WIxi9XC5EJlGhyeHPg8JOTNTCllQ8=; b=dNAOU9kNtnXOIG6zeHm63Xv8XC3s6N1Jt+EvBReH3JeK5qyKF89Eb8HI0XWVXG7E921iyI c5e77c0wI5ft951TulYVQYwH9YQEkAaMpBKjZ7Blj4tijuB/0BfS28OtfjmUNQ/Ipi0BEt +ioGXqS8bsSWm5g5ZKE8nwTrppcaZc4= X-MC-Unique: ns8n_V4hOvmoE9yMw6s2hA-1 From: Oksana Vohchana To: qemu-devel@nongnu.org Subject: [PATCH v2 1/3] Adding functions _send_fds and _recv_fds Date: Thu, 20 Feb 2020 17:10:37 +0200 Message-Id: <20200220151039.20552-2-ovoshcha@redhat.com> In-Reply-To: <20200220151039.20552-1-ovoshcha@redhat.com> References: <20200220151039.20552-1-ovoshcha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ovoshcha@redhat.com, philmd@redhat.com, ehabkost@redhat.com, wainersm@redhat.com, crosa@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" It provides new possibilities to send or receive data through the Unix doma= in socket file descriptor. This is useful for obtaining a socket that belongs to a different network namespace. Signed-off-by: Oksana Vohchana --- python/qemu/machine.py | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 183d8f3d38..976316e5f5 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -24,6 +24,7 @@ import subprocess import shutil import socket import tempfile +import array =20 from . import qmp =20 @@ -155,6 +156,29 @@ class QEMUMachine(object): self._args.append(','.join(options)) return self =20 + def _recv_fds(self, sock, msglen=3D8192, maxfds=3D4096): + """ + Function from: + https://docs.python.org/3/library/socket.html#socket.socket.recvmsg + """ + fds =3D array.array("i") + msg, ancdata, flags, addr =3D sock.recvmsg(msglen, socket.CMSG_LEN( + maxfds * fds.itemsize)) + for cmsg_level, cmsg_type, cmsg_data in ancdata: + if (cmsg_level =3D=3D socket.SOL_SOCKET and + cmsg_type =3D=3D socket.SCM_RIGHTS): + fds.frombytes(cmsg_data[:len(cmsg_data) - (len(cmsg_data) + % fds.itemsize)]) + return msg, list(fds) + + def _send_fds(self, sock, msg, fds): + """ + Function from: + https://docs.python.org/3/library/socket.html#socket.socket.sendmsg + """ + return sock.sendmsg([msg], [(socket.SOL_SOCKET, socket.SCM_RIGHTS, + array.array("i", fds))]) + def send_fd_scm(self, fd=3DNone, file_path=3DNone): """ Send an fd or file_path to socket_scm_helper. --=20 2.21.1