Dbus -没有收到回复

Question

我对Dbus有个奇怪的问题..。

我用Dbus-1。

问题是，它只在有时和不同的地方发生。有时用于IDAMsg_GetFontName，有时用于IDAMsg_GetForeColor (例如)。也许程序运行十倍好，然后有一次有错误。或者四倍罚款，然后两次错误。

但是，来自我的std::cout和Dbus的错误消息总是相同的：

Too few arguments

和

Did not receive a reply

但是，我怎么能有时争论太少呢？

怎么才能给Dbus这个错误信息，就像它看上去的那样，一个回复已经发送并得到了？

我们真的很感激你的帮助。

提亚

早咬

Dbus消息是：

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.

发送一种方法：

if(vMethod == IDAMsg_Init || vMethod == IDAMsg_GetFontName
|| vMethod == IDAMsg_AppQuit
|| vMethod == IDAMsg_GetBackColor || vMethod == IDAMsg_GetForeColor
|| vMethod == IDAMsg_GetBorderColor){
    dbus_message_iter_init_append(msg, &args);
    if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &vMsg.Str_Send[0])) {
         cout << "DBUS -- SEND -- OUT OF MEMORY 1" << endl; return 0;
    }
    if(vMethod == IDAMsg_GetBorderColor || vMethod == IDAMsg_AppQuit){
        if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &vMsg.Str_Send[1])) {
             cout << "DBUS -- SEND -- OUT of Memory 2" << endl; return 0;
        }
    }
}

答覆如下：

if(vMethod == IDAMsg_Init || vMethod == IDAMsg_AppQuit
|| vMethod == IDAMsg_GetFontName
|| vMethod == IDAMsg_GetBackColor || vMethod == IDAMsg_GetForeColor
|| vMethod == IDAMsg_GetBorderColor){
    if (DBUS_TYPE_STRING != dbus_message_iter_get_arg_type(&args)){
         cout << "DBUS -- REPLY -- ARG is not String 1 " << endl;
    } else {
         dbus_message_iter_get_basic(&args, &nStr_In[0]);
    }
    if(vMethod == IDAMsg_GetBorderColor || vMethod == IDAMsg_AppQuit){
        if (!dbus_message_iter_next(&args)){
             cout << "DBUS -- REPLY -- Message has too few arguments 1" << endl;
        } else if (DBUS_TYPE_STRING != dbus_message_iter_get_arg_type(&args)){
             cout << "DBUS -- REPLY -- Argument is not STRING 2" << endl;
        } else {
             dbus_message_iter_get_basic(&args, &nStr_In[1]);
        }
    }
    reply = dbus_message_new_method_return(msg);
    dbus_message_iter_init_append(reply, &args);
}
if(vMethod == IDAMsg_Init){
    if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_BOOLEAN, &stat)) {
         cout << "DBUS -- REPLY -- OUT of Memory 1" << endl; return;
    }
    if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_UINT32, &level)) {
         cout << "DBUS -- REPLY -- OUT of Memory 2" << endl; return;
    }
}

std::cout输出通常为：

DBUS -- EBIDA_IDA_Server -- Method Reply for : GetForeColor
DBUS -- IDABrowse -- Got Reply  245_245_245 21614
IDA -- IDABrowse -- INCOMING CALLBACK : GetBorderColor
DBUS -- IDABrowse -- Request send with : GetBorderColor
DBUS -- EBIDA_IDA_Server -- Method Reply for : GetBorderColor
DBUS -- IDABrowse -- Got Reply  102_143_165 21614
IDA -- IDABrowse -- INCOMING CALLBACK : GetBorderColor
DBUS -- IDABrowse -- Request send with : GetBorderColor
DBUS -- EBIDA_IDA_Server -- Method Reply for : GetBorderColor
DBUS -- IDABrowse -- Got Reply  126_177_204 21614
IDA -- IDABrowse -- INCOMING CALLBACK : GetBorderColor
DBUS -- IDABrowse -- Request send with : GetBorderColor
DBUS -- EBIDA_IDA_Server -- Method Reply for : GetBorderColor
DBUS -- IDABrowse -- Got Reply  148_207_239 21614

但是如果出了什么问题，它看起来是这样的：

DBUS -- EBIDA_IDA_Server -- Method Reply for : GetForeColor
DBUS -- IDABase -- Got Reply  245_245_245 21614
IDA -- IDABase -- INCOMING CALLBACK : GetBorderColor
DBUS -- EBIDA_IDA_Server -- Method Reply for : GetBorderColor
DBUS -- IDABase -- Request send with : GetBorderColor
DBUS --  SEND -- Message has too few arguments 1
DBUS -- IDABase -- Got Reply  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. 32723

编辑：

我认为这方面的问题如下：

这是输出的正常顺序：

IDA -- IDABrowse -- INCOMING CALLBACK : GetBorderColor
DBUS -- IDABrowse -- Request sending with : GetBorderColor
DBUS -- EBIDA_IDA_Server -- Method Reply for : GetBorderColor
DBUS -- IDABrowse -- Got Reply  126_177_204 21614

当发生错误时：

IDA -- IDABrowse -- INCOMING CALLBACK : GetBorderColor
DBUS -- EBIDA_IDA_Server -- Method Reply for : GetBorderColor
DBUS -- IDABrowse -- Request sending with : GetBorderColor
DBUS -- IDABrowse -- Got Reply  126_177_204 21614

如果出现错误，则第2行和第3行已更改。

回复在请求发送之前就存在了..。

Answer 1

调试它的方法是使用dbus-monitor或喧闹查看总线上的通信量(请求、回复、错误)。这将精确地指出错误，并向您显示是什么消息导致了错误。