[Bug 1903470] [NEW] qemu 5.1.0: Add UNIX socket support for netdev socket

[Bug 1903470] [NEW] qemu 5.1.0: Add UNIX socket support for netdev socket

[Mark Karpeles]

Public bug reported:

Note: this is a feature request.

qemu has a way to connect instances using a socket:

-netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

This can also be used to connect a qemu instance to something else using
a socket connection, however there is no authentication or security to
the connection, so rather than using a port which can be accessed by any
user on the machine, having the ability to use or connect to UNIX
sockets would be helpful, and adding this option should be fairly
trivial.

UNIX sockets can be found in various parts of qemu (monitor, etc) so I
believe having this on network would make sense.

** Affects: qemu
     Importance: Undecided
         Status: New

** Description changed:

+ Note: this is a feature request.
+ 
  qemu has a way to connect instances using a socket:
  
  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]
  
  This can also be used to connect a qemu instance to something else using
  a socket connection, however there is no authentication or security to
  the connection, so rather than using a port which can be accessed by any
  user on the machine, having the ability to use or connect to UNIX
  sockets would be helpful, and adding this option should be fairly
  trivial.
  
  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  New

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

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[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[elmarco]

With the fd= argument/property, you can setup a private socketpair
connection already. Is this enough?

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  New

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

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[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[Thomas Huth]

** Changed in: qemu
       Status: New => Incomplete

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  Incomplete

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1903470/+subscriptions

[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[Mark Karpelès]

Thanks for the response. I'm not sure, how would I run qemu with a fd=
socketpair on the command line?

The wiki (https://wiki.qemu.org/index.php/Documentation/Networking)
suggests for example to use:

-netdev socket,id=mynet0,listen=:1234
-netdev socket,id=mynet0,connect=:1234

This would allow however anyone on the same network (or in the world if
run on a server) to connect to this network and possibly do bad things.
Using localhost binding helps but is still risky if there is more than
one user on a given machine. Using something like:

-netdev socket,id=mynet0,listen=~/.qemu-netsocket
-netdev socket,id=mynet0,connect=~/.qemu-netsocket

How would one do that with fd= ?

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  Incomplete

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1903470/+subscriptions

[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  Expired

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1903470/+subscriptions

[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[Yury Bushmelev]

JFYI I miss the ability to use Unix socket right now.. I'm trying to use
vagrant + vagrant-qemu + socket_vmnet on Macbook m1. It'd be MUCH easier
to connect QEMU to the socket_vmnet' Unix socket directly w/o any
wrappers..

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  Expired

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1903470/+subscriptions

[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[Laurent Vivier]

This will be available in the next QEMU release (7.2) under a sligthly
different form:

"-netdev stream" for TCP socket and "-netdev dgram" for UDP socket.

Both support inet and unix sockets. See qemu(1).

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  Expired

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1903470/+subscriptions

[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[Laurent Vivier]

This was added to support passt:

https://passt.top

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  Expired

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1903470/+subscriptions

[Bug 1903470] Re: qemu 5.1.0: Add UNIX socket support for netdev socket

[Mark Karpelès]

Despite what is said in an earlier comment, qemu(1) has no information
on -netdev stream or -netdev dgram.

The best help I could find comes from the patch description:

https://patchew.org/QEMU/20221021090922.170074-1-lvivier@redhat.com/

Example use:

-netdev stream,id=socket0,server=off,addr.type=unix,addr.path=/tmp/qemu0

Also useful to note that the reconnect argument is only going to be
available in qemu 8.0.0 (not released yet)

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Title:
  qemu 5.1.0: Add UNIX socket support for netdev socket

Status in QEMU:
  Expired

Bug description:
  Note: this is a feature request.

  qemu has a way to connect instances using a socket:

  -netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]

  This can also be used to connect a qemu instance to something else
  using a socket connection, however there is no authentication or
  security to the connection, so rather than using a port which can be
  accessed by any user on the machine, having the ability to use or
  connect to UNIX sockets would be helpful, and adding this option
  should be fairly trivial.

  UNIX sockets can be found in various parts of qemu (monitor, etc) so I
  believe having this on network would make sense.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1903470/+subscriptions