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