On Tue, Feb 24, 2004 at 07:15:30PM +0100, Sven Neumann wrote: > [39 lines, 175 words, 1301 characters] Top characters: _enoiald > > Hi, > > Jeff Abrahamson <jeff@xxxxxxxxxx> writes: > > > I have an app that talks UDP, and I'd like to use a glib-2.0 main > > event loop to handle communication. (I can handle it myself using > > sendto and recvfrom, but I'd like the main event loop to do polling > > for me and then call my handler functions. > > > > So I (apparently naively) write the following (with error checking > > mostly stripped for this email). > > > > > > sock = socket(AF_INET, SOCK_DGRAM, 0); > > > > memset(&saddr, 0, sizeof(saddr)); > > saddr.sin_family = AF_INET; > > saddr.sin_addr.s_addr = htonl(INADDR_ANY); /* anyone can talk to us */ > > saddr.sin_port = port; > > ret = bind(sock, (struct sockaddr *)&saddr, sizeof(saddr)); > > > > ioc = g_io_channel_unix_new(sock); > > ret = g_io_add_watch(ioc, G_IO_IN | G_IO_PRI, serve_input_handler, 0); > > You will need to unset the io channel's encoding (it defaults to UTF-8): > > g_io_channel_set_encoding (ioc, NULL, NULL); > > If you are looking for some example code that does UDP with > GIOChannels, take a look at BSender and BReceiver in Blib: > > http://sven.gimp.org/blinkenlights/blib-1.1.5.tar.gz Thanks for the tip and the source code. Setting the encoding unfortunately just gives me a different error stream. Now I see an infinite stream of these: (process:12739): GLib-CRITICAL **: file giochannel.c: line 1662 (g_io_channel_read_to_end): assertion `(error == NULL) || (*error == NULL)' failed I get this by calling GError *err; iostat = g_io_channel_read_to_end(source, &str_return, &length, &err); I note that in blib you do the same work-around I had settled on: req_fd = g_io_channel_unix_get_fd (io); buf_read = recvfrom (req_fd, buf, sizeof (buf), 0, (struct sockaddr *) &req_addr, &req_addr_length); ;-) Maybe that's the way I should do it, since I have that working. I was mostly curious if glib could somehow save me from having to know quite so much about sockets. But it's no big loss, as I already know so much about sockets... -- Jeff Jeff Abrahamson <http://www.purple.com/jeff/> GPG fingerprint: 1A1A BA95 D082 A558 A276 63C6 16BF 8C4C 0D1D AE4B _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
