Hello, I need a help with setting source address for outgoing UDP datagrams. I have a PF_INET6 socket bound to "::" (unspecified address) and a port. That allows me to accept both IPv4 and IPv6 UDP datagrams. Now I want to send a UDP/IPv4 datagram with some specific IP address and the port bound to the above socket. But I am not able to do it. All ways, I used, failed. 1. I tried to specify source address via ancillary data (IPV6_PKTINFO) to sendmsg() This doesn't work because IPV6_PKTINFO is not supported for IPv4-mapped addresses. 2.Tried to create a new socket and bind it to the required source address and port This doesn't work either because it's not possible to create completly duplicate binding. Note: This is possible on Solaris, as the first address is unspecified (::) ! Is there any solution to my problem? 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