[dbus]How to verify the capability of dbus IPC between machines
Pavel Strashkin
pavel.strashkin at gmail.com
Wed Nov 30 19:36:39 PST 2011
I have the latest 1.4.x. The command should be "DBUS_VERBOSE=1
dbus-send --address=tcp:host=127.0.0.1,port=12434 --print-reply
--type=method_call --dest=org.freedesktop.DBus /org/freedesktop/DBus
org.freedesktop.DBus.ListNames". If it doesn't work, try to run it via
strace: "strace dbus-send ...".
2011/11/30 yinxb <yinxiaobiao at gmail.com>:
> Hi Pavel Strashkin
>
> I downloaded the dbus-1.5.0.tar.gz from
> http://cgit.freedesktop.org/dbus/dbus/
> and ./configure --enable-verbose-mode and make & make install.
> when execute the commad metioned in your last mail,
> I cannot find debug info output.
>
> Also I tried to find the debug version of dbus,and dpkg the package.
> http://packages.ubuntu.com/maverick/dbus-1-dbg
> when use dbus-send,it tells me
> dbus-send: cannot execute binary file
>
> Would you please tell me what is the version of dbus & dbus debug.
> More,Could you kindly tell me the command works in your host and client
> ============
> dbus-send --address=... --print-reply
> --type=method_call --dest=org.freedesktop.DBus /org/freedesktop/DBus
> org.freedesktop.DBus.ListNames
> ============
>
> Thanks very much indeed
>
> 在 2011年11月30日 上午11:53，Pavel Strashkin <pavel.strashkin at gmail.com> 写道：
>> It only means that you can't use --address and --system (--session)
>> command line options together. --system and --session is kind of alias
>> for --address.
>>
>> Try the following call: dbus-send --address=... --print-reply
>> --type=method_call --dest=org.freedesktop.DBus /org/freedesktop/DBus
>> org.freedesktop.DBus.ListNames
>>
>> Put right address there. Also try the same call on localhost where
>> you're listening on 12434 port, use 127.0.0.1 or localhost as a host
>> name.
>>
>> 2011/11/29 yinxb <yinxiaobiao at gmail.com>:
>>> It seems the host(remote pc) is listenning the 12434 port.
>>>
>>> another question,when I execute the following command
>>> dbus-send --address=tcp:host=10.239.58.116,port=12434 --system
>>> --type=method_call --print-reply --dest=org.gnome.DisplayManager
>>> /org/gnome/DisplayManager/Manager
>>> org.gnome.DisplayManager.Manager.GetDisplays
>>>
>>> Get the messages:
>>> ----------------------
>>> --address" may not be used with "--system" or "--session"
>>> ---------------------
>>> Does it mean remote dbus cannot call system bus and session bus in host?
>>> and then what kind of bus can be used in the remote case?
>>>
>>> ps:
>>> DisplayManager is system bus
>>>
>>> 在 2011年11月30日 上午10:04，yinxb <yinxiaobiao at gmail.com> 写道：
>>>> get the following list in local PC
>>>> ----------------------
>>>> tcp 0 0 0.0.0.0:2049 0.0.0.0:*
>>>> LISTEN -
>>>> tcp 0 0 0.0.0.0:59747 0.0.0.0:*
>>>> LISTEN -
>>>> tcp 0 0 0.0.0.0:40967 0.0.0.0:*
>>>> LISTEN 1554/dbus-daemon
>>>> tcp 0 0 0.0.0.0:111 0.0.0.0:*
>>>> LISTEN 617/portmap
>>>> tcp 0 0 0.0.0.0:22 0.0.0.0:*
>>>> LISTEN 586/sshd
>>>> tcp 0 0 127.0.0.1:631 0.0.0.0:*
>>>> LISTEN 984/cupsd
>>>> tcp 0 0 0.0.0.0:59962 0.0.0.0:*
>>>> LISTEN 699/rpc.statd
>>>> tcp 0 0 0.0.0.0:52732 0.0.0.0:*
>>>> LISTEN 927/rpc.mountd
>>>> tcp 0 0 0.0.0.0:60317 0.0.0.0:*
>>>> LISTEN 1768/dbus-daemon
>>>> tcp6 0 0 :::22 :::*
>>>> LISTEN 586/sshd
>>>> tcp6 0 0 ::1:631 :::*
>>>> LISTEN 984/cupsd
>>>> --------------------------
>>>>
>>>> in remotePC
>>>> -------------------------
>>>> tcp 0 0 0.0.0.0:2049 0.0.0.0:*
>>>> LISTEN -
>>>> tcp 0 0 0.0.0.0:53097 0.0.0.0:*
>>>> LISTEN 770/rpc.statd
>>>> tcp 0 0 0.0.0.0:34474 0.0.0.0:*
>>>> LISTEN 1125/rpc.mountd
>>>> tcp 0 0 0.0.0.0:111 0.0.0.0:*
>>>> LISTEN 730/portmap
>>>> tcp 0 0 0.0.0.0:12434 0.0.0.0:*
>>>> LISTEN 512/dbus-daemon
>>>> tcp 0 0 0.0.0.0:33267 0.0.0.0:*
>>>> LISTEN -
>>>> tcp 0 0 0.0.0.0:22 0.0.0.0:*
>>>> LISTEN 1559/sshd
>>>> tcp 0 0 127.0.0.1:631 0.0.0.0:*
>>>> LISTEN 1380/cupsd
>>>> tcp6 0 0 :::22 :::*
>>>> LISTEN 1559/sshd
>>>> tcp6 0 0 ::1:631 :::*
>>>> LISTEN 1380/cupsd
>>>> -------------------------
>>>> 2011/11/30, Pavel Strashkin <pavel.strashkin at gmail.com>:
>>>>> What about "netstat -nlpt"? Does it show that some process is
>>>>> listening on 12434 TCP/IP port?
>>>>>
>>>>> 2011/11/29 yinxb <yinxiaobiao at gmail.com>:
>>>>>> Hi Pavel Strashkin
>>>>>>
>>>>>> It seems that dbus-monitor did not connect the specified host & port.
>>>>>>
>>>>>> When execute the command in remotePC or lolcaPC:
>>>>>> dbus-monitor --address tcp:host=xx.xxx.xx.116,port=12434
>>>>>> only get the register failed message
>>>>>> ========
>>>>>> Failed to register connection to bus at
>>>>>> tcp:host=10.239.58.116,port=12434: Did not receive a reply. Possible
>>>>>> causes include: the remote application did not send a reply, the
>>>>>> message bus security policy blocked the reply, the reply timeout
>>>>>> expired, or the network connection was broken.
>>>>>> ========
>>>>>> I even turned off the firewall on both remotePC and localPC and
>>>>>> still get the same result.
>>>>>>
>>>>>> 在 2011年11月30日 上午3:34，Pavel Strashkin <pavel.strashkin at gmail.com> 写道：
>>>>>>> Does dbus-monitor successfully connect to dbus-daemon on specified host &
>>>>>>> port?
>>>>>>>
>>>>>>> 2011/11/28 yinxb <yinxiaobiao at gmail.com>:
>>>>>>>> In addition,dbus-monitor in the remote PC cannot find any info related
>>>>>>>> the dbus-send.
>>>>>>>>
>>>>>>>> 在 2011年11月29日 上午10:38，yinxb <yinxiaobiao at gmail.com> 写道：
>>>>>>>>> Hi Thiago Macieira and Pavel
>>>>>>>>>
>>>>>>>>> Thanks for your reply.
>>>>>>>>>
>>>>>>>>> As metioned in your mail,I did the following steps:
>>>>>>>>> 1.Romote PC:
>>>>>>>>> Config /etc/dbus-1/system.conf.
>>>>>>>>> Add listen tcp:host=0.0.0.0,port=12434
>>>>>>>>>
>>>>>>>>> 2.Local PC:
>>>>>>>>> dbus-send --address=tcp:host=xx.xxx.xx.116,port=12434 --print-reply
>>>>>>>>> --dest=org.gnome.PowerManager
>>>>>>>>> /org/ayatana/NotificationItem/gnome_power_manager/Menu
>>>>>>>>> org.freedesktop.Dbus.Introspectable.Introspect
>>>>>>>>>
>>>>>>>>> after that,I got the following message:
>>>>>>>>> Error org.freedesktop.DBus.Error.NoReply: Did not receive a reply.
>>>>>>>>> Possible causes include: the remote application did not send a reply,
>>>>>>>>> the message bus security policy blocked the reply, the reply timeout
>>>>>>>>> expired, or the network connection was broken.
>>>>>>>>>
>>>>>>>>> Can you figure out what is missing or wrong with my steps?
>>>>>>>>>
>>>>>>>>> ps:
>>>>>>>>> telnet can connect the remote PC (xx.xxx.xx.116).
>>>>>>>>>
>>>>>>>>> 2011/11/29 Thiago Macieira <thiago at kde.org>:
>>>>>>>>>> On Monday, 28 de November de 2011 15.59.42, 尹YinXiaobiao wrote:
>>>>>>>>>>> Hi all
>>>>>>>>>>> I am a newbie at Dbus and this is my first mail in this
>>>>>>>>>>> maillist.
>>>>>>>>>>> By some investigate and look at the source code,I know that dbus
>>>>>>>>>>> is using socket(tcp & unix domain socket) to transfer data.
>>>>>>>>>>> So it is possible for communication between two machines(or VM).
>>>>>>>>>>
>>>>>>>>>> Right, it's possible.
>>>>>>>>>>
>>>>>>>>>>> Now my question is how to vevify this capability by dbus-send
>>>>>>>>>>> command.
>>>>>>>>>>> Can anyone give me a hint?
>>>>>>>>>>
>>>>>>>>>> Just send the message you want to send. You know the address of the
>>>>>>>>>> bus server
>>>>>>>>>> to connect to, so pass it in the --address= option. You know that
>>>>>>>>>> address
>>>>>>>>>> because you configured the other machine with it.
>>>>>>>>>>
>>>>>>>>>>> Someone tell me that dbus do not listen on TCP by default,how to
>>>>>>>>>>> enable TCP listen?
>>>>>>>>>>
>>>>>>>>>> Create your own config file and change the <listen> directive to be on
>>>>>>>>>> TCP.
>>>>>>>>>>
>>>>>>>>>> Remember: D-Bus TCP is unauthenticated an unencrypted. It accepts
>>>>>>>>>> connections
>>>>>>>>>> from anywhere and trusts it blindly.
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
>>>>>>>>>> Software Architect - Intel Open Source Technology Center
>>>>>>>>>> PGP/GPG: 0x6EF45358; fingerprint:
>>>>>>>>>> E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> dbus mailing list
>>>>>>>>>> dbus at lists.freedesktop.org
>>>>>>>>>> http://lists.freedesktop.org/mailman/listinfo/dbus
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> dbus mailing list
>>>>>>>> dbus at lists.freedesktop.org
>>>>>>>> http://lists.freedesktop.org/mailman/listinfo/dbus
>>>>>>>>
>>>>>>
>>>>>
>>>
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