It provides new possibilities to send or receive data through the Unix domain
socket file descriptor.
This is useful for obtaining a socket that belongs to a different network
namespace.
Signed-off-by: Oksana Vohchana <ovosh...@redhat.com>
---
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
from . import qmp
@@ -155,6 +156,29 @@ class QEMUMachine(object):
self._args.append(','.join(options))
return self
+ def _recv_fds(self, sock, msglen=8192, maxfds=4096):
+ """
+ Function from:
+ https://docs.python.org/3/library/socket.html#socket.socket.recvmsg
+ """
+ fds = array.array("i")
+ msg, ancdata, flags, addr = sock.recvmsg(msglen, socket.CMSG_LEN(
+ maxfds * fds.itemsize))
+ for cmsg_level, cmsg_type, cmsg_data in ancdata:
+ if (cmsg_level == socket.SOL_SOCKET and
+ cmsg_type == 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=None, file_path=None):
"""
Send an fd or file_path to socket_scm_helper.
--
2.21.1
