Hi list:

        I met a problem when made a multicast program.

        The problem is that when I send packet to the socket(have join a multicast 
group) on 

the linux from hpux 10.2 or windows 2000, the max size of per packet is 28112, though 
I 

have set the SO_RCVBUF of socket on the linxu equal to 32768, like this:

int bufsize = 32768;
int len = sizeof(int);
setsockopt(hSocket, SOL_SOCKET, SO_RCVBUF, &bufsize, &len);

thanks for helping and hints 





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