[Bug 1862979] [NEW] Cannot Create Socket Networking in Windows Host using Multicast

[Faisal Al-Humaimidi]

Public bug reported:

Hello QEMU devs,

I am trying to create a simulated VLAN using socket networking, and the
only way to connect multiple networks in QEMU using socket networking is
by using the multicast `mcast` option of the `socket` network backend.

However, when I try use the following arguments in QEMU to create a
multicast socket network:

`-device e1000,id=sock-0 -netdev id=sock-0,mcast=230.0.0.1:1234`

it fails with:

`can't bind ip address=230.0.0.1: unknown error` in my Windows host.

I would like to know if this is a bug, or if I am missing a prerequisite
before running the QEMU command.

By the way, I am using Windows 10, and running a cross-compiled QEMU
4.2.0.

** Affects: qemu
     Importance: Undecided
         Status: New

** Description changed:

  Hello QEMU devs,
  
  I am trying to create a simulated VLAN using socket networking, and the
  only way to connect multiple networks in QEMU using socket networking is
  by using the multicast `mcast` option of the `socket` network backend.
  
  However, when I try use the following arguments in QEMU to create a
  multicast socket network:
  
  `-device e1000,id=sock-0 -netdev id=sock-0,mcast=230.0.0.1:1234`
  
  it fails with:
  
  `can't bind ip address=230.0.0.1: unknown error` in my Windows host.
  
  I would like to know if this is a bug, or if I am missing a prerequisite
  before running the QEMU command.
+ 
+ By the way, I am using Windows 10.

** Description changed:

  Hello QEMU devs,
  
  I am trying to create a simulated VLAN using socket networking, and the
  only way to connect multiple networks in QEMU using socket networking is
  by using the multicast `mcast` option of the `socket` network backend.
  
  However, when I try use the following arguments in QEMU to create a
  multicast socket network:
  
  `-device e1000,id=sock-0 -netdev id=sock-0,mcast=230.0.0.1:1234`
  
  it fails with:
  
  `can't bind ip address=230.0.0.1: unknown error` in my Windows host.
  
  I would like to know if this is a bug, or if I am missing a prerequisite
  before running the QEMU command.
  
- By the way, I am using Windows 10.
+ By the way, I am using Windows 10, and running a cross-compiled QEMU
+ 4.2.0.

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https://bugs.launchpad.net/bugs/1862979

Title:
  Cannot Create Socket Networking in Windows Host using Multicast

Status in QEMU:
  New

Bug description:
  Hello QEMU devs,

  I am trying to create a simulated VLAN using socket networking, and
  the only way to connect multiple networks in QEMU using socket
  networking is by using the multicast `mcast` option of the `socket`
  network backend.

  However, when I try use the following arguments in QEMU to create a
  multicast socket network:

  `-device e1000,id=sock-0 -netdev id=sock-0,mcast=230.0.0.1:1234`

  it fails with:

  `can't bind ip address=230.0.0.1: unknown error` in my Windows host.

  I would like to know if this is a bug, or if I am missing a
  prerequisite before running the QEMU command.

  By the way, I am using Windows 10, and running a cross-compiled QEMU
  4.2.0.

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