versaplexd/vxdbusutils.cs

   1 using System;
   2 using Wv;
   3
   4 // Utility methods for dealing with DBus
   5 class VxDbusUtils
   6 {
   7     static string DbusConnName = "vx.versaplexd";
   8     static string DbusInterface = "vx.db";
   9     static readonly ObjectPath DbusObjPath;
  10
  11     static VxDbusUtils()
  12     {
  13         DbusObjPath = new ObjectPath("/db");
  14     }
  15
  16     // Fishes an error name and error message out of a DBus message and
  17     // returns them in an exception.
  18     public static Exception GetDbusException(Message reply)
  19     {
  20         object errname;
  21         if (!reply.Header.Fields.TryGetValue(FieldCode.ErrorName, out errname))
  22             return new Exception("Could not find error name in DBus message.");
  23
  24         object errsig;
  25         if (!reply.Header.Fields.TryGetValue(FieldCode.Signature, out errsig) ||
  26                 errsig.ToString() != "s")
  27             return new DbusError(errname.ToString());
  28
  29         MessageReader mr = new MessageReader(reply);
  30
  31         string errmsg = mr.ReadString();
  32
  33         return new DbusError(errname.ToString() + ": " + errmsg.ToString());
  34     }
  35
  36     // Create a method call using the default connection, object path, and
  37     // interface
  38     public static Message CreateMethodCall(Bus bus,
  39         string member, string signature)
  40     {
  41         return CreateMethodCall(bus, DbusConnName, DbusObjPath,
  42             DbusInterface, member, signature);
  43     }
  44
  45     public static Message CreateMethodCall(Bus bus, string destination,
  46             ObjectPath path, string iface, string member, string signature)
  47     {
  48         Message msg = new Message();
  49         msg.Connection = bus;
  50         msg.Header.MessageType = MessageType.MethodCall;
  51         msg.Header.Flags = HeaderFlag.None;
  52         msg.Header.Fields[FieldCode.Path] = path;
  53         msg.Header.Fields[FieldCode.Member] = member;
  54
  55         if (destination != null && destination != "")
  56             msg.Header.Fields[FieldCode.Destination] = destination;
  57
  58         if (iface != null && iface != "")
  59             msg.Header.Fields[FieldCode.Interface] = iface;
  60
  61         if (signature != null && signature != "")
  62             msg.Header.Fields[FieldCode.Signature] = new Signature(signature);
  63
  64         return msg;
  65     }
  66
  67 }