4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
25 using System.Runtime.InteropServices;
27 using Mono.Unix.Native;
29 using Stdlib = Mono.Unix.Native.Stdlib;
33 internal class Utility
36 private static extern int strlen (IntPtr ptr);
38 [DllImport ("avahi-common")]
39 private static extern IntPtr avahi_address_snprint (IntPtr buf, int size, IntPtr address);
41 [DllImport ("avahi-common")]
42 private static extern IntPtr avahi_address_parse (IntPtr str, Protocol proto, IntPtr ret);
44 public static string PtrToString (IntPtr ptr)
46 if (ptr == IntPtr.Zero)
49 int len = strlen (ptr);
50 byte[] bytes = new byte[len];
51 Marshal.Copy (ptr, bytes, 0, len);
52 return Encoding.UTF8.GetString (bytes);
55 public static string PtrToStringFree (IntPtr ptr)
57 if (ptr == IntPtr.Zero)
60 string ret = PtrToString (ptr);
65 public static byte[] StringToBytes (string str)
70 return Encoding.UTF8.GetBytes (str + "\0"); // lame.
73 private static IntPtr StringToPtr (string str)
78 byte[] bytes = Utility.StringToBytes (str);
79 IntPtr buf = Stdlib.malloc ((uint) bytes.Length + 1);
80 Marshal.Copy (bytes, 0, buf, bytes.Length);
81 Marshal.WriteByte (buf, bytes.Length, 0);
85 public static void Free (IntPtr ptr)
90 public static IntPtr AddressToPtr (IPAddress address)
92 IntPtr straddr = Utility.StringToPtr (address.ToString ());
93 IntPtr addrPtr = Stdlib.malloc (32);
94 avahi_address_parse (straddr, Protocol.Unspecified, addrPtr);
95 Utility.Free (straddr);
100 public static IPAddress PtrToAddress (IntPtr ptr)
102 IPAddress address = null;
104 if (ptr != IntPtr.Zero) {
105 IntPtr buf = Stdlib.malloc (256);
106 IntPtr addrPtr = avahi_address_snprint (buf, 256, ptr);
107 address = IPAddress.Parse (Utility.PtrToString (addrPtr));
108 Utility.Free (addrPtr);