[Qemu-devel] [Bug 1213196] [NEW] -serial tcp should hang up when DTR goes low

[Qemu-devel] [Bug 1213196] [NEW] -serial tcp should hang up when DTR goes low

[Nathaniel Filardo]

Public bug reported:

In keeping with the spirit of serial modem control signals, de-asserting
DTR should cause the TCP connection to break; asserting DTR should cause
QEMU to initiate a new connection or for it to accept another (in server
mode; this may involve waiting for one to arrive, too).

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  -serial tcp should hang up when DTR goes low

Status in QEMU:
  New

Bug description:
  In keeping with the spirit of serial modem control signals, de-
  asserting DTR should cause the TCP connection to break; asserting DTR
  should cause QEMU to initiate a new connection or for it to accept
  another (in server mode; this may involve waiting for one to arrive,
  too).

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[Bug 1213196] Re: -serial tcp should hang up when DTR goes low

[Thomas Huth]

** Changed in: qemu
   Importance: Undecided => Wishlist

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Title:
  -serial tcp should hang up when DTR goes low

Status in QEMU:
  New

Bug description:
  In keeping with the spirit of serial modem control signals, de-
  asserting DTR should cause the TCP connection to break; asserting DTR
  should cause QEMU to initiate a new connection or for it to accept
  another (in server mode; this may involve waiting for one to arrive,
  too).

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1213196/+subscriptions

[Bug 1213196] Re: -serial tcp should hang up when DTR goes low

[Darrin M. Gorski]

In addition to allowing low DTR to drop the socket connection, and
allowing low DTR to reject a socket connection, the DCD modem bit also
be implemented - DCD should follow the state of the TCP socket: a
connected socket should pull DCD high, and a disconnected socket should
pull DCD low. From what Ive seen in the source, it looks like a serial
IOCTL functioned needs to be added to chardev/char-socket.c to allow the
MSR bits to be tracked against the state of the socket.  DCD should be
very easy to implement this way, but I hadn't thought about DTR.

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https://bugs.launchpad.net/bugs/1213196

Title:
  -serial tcp should hang up when DTR goes low

Status in QEMU:
  New

Bug description:
  In keeping with the spirit of serial modem control signals, de-
  asserting DTR should cause the TCP connection to break; asserting DTR
  should cause QEMU to initiate a new connection or for it to accept
  another (in server mode; this may involve waiting for one to arrive,
  too).

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1213196/+subscriptions

[Bug 1213196] Re: -serial tcp should hang up when DTR goes low

[Darrin M. Gorski]

Sent in a patch for this.

https://lists.gnu.org/archive/html/qemu-devel/2020-12/msg04658.html

DTR controls the socket.

DCD reflects the state of the socket.

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https://bugs.launchpad.net/bugs/1213196

Title:
  -serial tcp should hang up when DTR goes low

Status in QEMU:
  New

Bug description:
  In keeping with the spirit of serial modem control signals, de-
  asserting DTR should cause the TCP connection to break; asserting DTR
  should cause QEMU to initiate a new connection or for it to accept
  another (in server mode; this may involve waiting for one to arrive,
  too).

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1213196/+subscriptions

[Bug 1213196] Re: -serial tcp should hang up when DTR goes low

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/97


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

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #97
   https://gitlab.com/qemu-project/qemu/-/issues/97

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https://bugs.launchpad.net/bugs/1213196

Title:
  -serial tcp should hang up when DTR goes low

Status in QEMU:
  Expired

Bug description:
  In keeping with the spirit of serial modem control signals, de-
  asserting DTR should cause the TCP connection to break; asserting DTR
  should cause QEMU to initiate a new connection or for it to accept
  another (in server mode; this may involve waiting for one to arrive,
  too).

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1213196/+subscriptions