> >Is there any solution to my problem? > Hmm. nobody come accross similar issues? I found a solution in the end. Linux supports IP_PKTINFO even on PF_INET6 sockets when IPv4-mapped addresses are used. Thus it's possible to specify source address of sent UDP datagrams in sendmsg(). Nevertheless, how much IPv4-mapped addresses are supported? Any documentation? Jiri Klimes -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html