[3/3] vnc: fix "info vnc" with "-vnc ..., reverse=on"

Submitted by Stefan Hajnoczi on Oct. 12, 2012, 9:18 a.m.

Details

Message ID 1350033496-3013-4-git-send-email-stefanha@redhat.com
State New
Headers show

Commit Message

Stefan Hajnoczi Oct. 12, 2012, 9:18 a.m.
From: Paolo Bonzini <pbonzini@redhat.com>

When reverse connection is in use, there is no active VNC server
socket.  Because of this, getsockopt(-1, ...) is attempted and
the following error is emitted:

    $ socat TCP-LISTEN:5900,reuseaddr TCP-LISTEN:5901,reuseaddr &
    $ x86_64-softmmu/qemu-system-x86_64 -vnc localhost:5900,reverse -monitor stdio
    QEMU 1.2.50 monitor - type 'help' for more information
    (qemu) info vnc
    An undefined error has occurred

Because however the host, family, service and auth fields are
optional, we can just exit if there is no active server socket.

    $ x86_64-softmmu/qemu-system-x86_64 -vnc localhost:5900,reverse -monitor stdio
    QEMU 1.2.50 monitor - type 'help' for more information
    (qemu) info vnc
    Server:
    Client:
         address: 127.0.0.1:5900
      x509_dname: none
        username: none

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 ui/vnc.c | 4 ++++
 1 file changed, 4 insertions(+)

Patch hide | download patch | download mbox

diff --git a/ui/vnc.c b/ui/vnc.c
index 01b2daf..33e6386 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -372,6 +372,10 @@  VncInfo *qmp_query_vnc(Error **errp)
             }
         }
 
+        if (vnc_display->lsock == -1) {
+            return info;
+        }
+
         if (getsockname(vnc_display->lsock, (struct sockaddr *)&sa,
                         &salen) == -1) {
             error_set(errp, QERR_UNDEFINED_ERROR);