Hi Julian, You should got a "internal" (since it doesn't seems to return a error code) during the bind operation, since you try to bind your sock to a multicast address (which is a wrong idea). If you only need to send mutlicast, you can bind to any addr/port, like this: addr.sin_family = AF_INET; addr.sin_port = htons(INADDR_ANY); addr.sin_addr.s_addr = htonl(INADDR_ANY); and next, change the IP address to the multicast group you want. addr.sin_addr.s_addr = htonl( (239<<24)|(255<<16)|(255<<8)|(250)); /* be sure of your byte-order */ Regards ==================================== Frédéric BERNON HYMATOM SA Chef de projet informatique Microsoft Certified Professional Tél. : +33 (0)4-67-87-61-10 Fax. : +33 (0)4-67-70-85-44 Email : [EMAIL PROTECTED] Web Site : http://www.hymatom.fr <http://www.hymatom.fr/> ==================================== P Avant d'imprimer, penser à l'environnement
-----Message d'origine-----
De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Julian
Gardner [RSD]
Envoyé : vendredi 20 juillet 2007 14:26
À : [email protected]
Objet : [lwip-users] missing something but what
I have a small problem and cant work out what i am doing wrong.
I have stripped out the code to this and this hangs in udp_sendto
waiting on a mbox
int sock;
int onBool = 1;
int err;
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(
(239<<24)|(255<<16)|(255<<8)|(250));
addr.sin_port = 50050;
sock = socket(PF_INET, SOCK_DGRAM, 0);
// err = setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, (char *)
&onBool, sizeof (int));
err = bind( sock, (struct sockaddr *)&addr, sizeof(struct
sockaddr));
err = sendto( sock, "Hello", 5, 0, (struct sockaddr *)&addr,
sizeof( addr));
closesocket( sock);
Any ideas, as i get no errors, also port 239.255.255.250 is opened as
multicast but i am not even getting data to be passed to the ethernet chip.
joolz
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