[Mono-bugs] [Bug 39178][Nor] Changed - UdpClient.Connect fails with broadcast address

bugzilla-daemon@rocky.ximian.com bugzilla-daemon@rocky.ximian.com
Tue, 11 Mar 2003 06:46:30 -0500 (EST)

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Changed by dick@ximian.com.


--- shadow/39178	Thu Mar  6 11:44:06 2003
+++ shadow/39178.tmp.6634	Tue Mar 11 06:46:30 2003
@@ -67,6 +67,47 @@
 SocketOptionName.Broadcast, 1);
 before calling Connect.
 (Client property = the Socket (it's protected in UdpClient))
+------- Additional Comments From dick@ximian.com  2003-03-11 06:46 -------
+Just for reference, I thought I'd added this before but I must have
+forgotten to:
+<Dick> EINTR? sounds more like EACCES
+<Dick> System.Net.Sockets.SocketException: Access denied
+<Dick> +in (unmanaged) mono(mono_raise_exception+0x20) [0x80c14f4]
+<Dick> +in (unmanaged) mono
+<Dick> +(ves_icall_System_Net_Sockets_Socket_Connect_internal+0x7a)
+<Dick>               The  user  tried  to connect to a broadcast address
+<Dick>               without having the socket broadcast flag enabled or
+<Dick>               the  connection  request  failed because of a local
+<Dick>               firewall rule.
+<Dick> "
+<gonzalo> i saw a errno=4 with gdb
+<gonzalo> #define       EINTR            4      /* Interrupted system
+call */
+<Dick> #define EACCES          13      /* Permission denied */
+<Dick> 321             if(ret==-1) {
+<Dick> (gdb) print errno
+<Dick> $2 = 4
+<Dick> (gdb) n
+<Dick> 322                     gint errnum = errno;
+<Dick> (gdb)
+<Dick> 327                     errnum = errno_to_WSA (errnum,
+<Dick> (gdb) s
+<Dick> errno_to_WSA (code=13, function_name=0x8190c73 "_wapi_connect")
+at error.c:62
+<Dick> 62              gint result = -1;
+<Dick> looks like some optimisation has shuffled errno assigning around
+<Dick> there doesnt seem to be any way of setting SO_BROADCAST from
+the class libraries, so i guess we need to see if we get EACCESS and
+try setting it there
+<gonzalo> btw, it works under mono/windows
+<Dick> yeah, its the library or the kernel denying you access for
+broadcast addresses