It is not implemented:
Code:
int uae_slirp_redir(int is_udp, int host_port, struct in_addr guest_addr,
int guest_port)
{
#ifdef WITH_QEMU_SLIRP
if (impl == QEMU_IMPLEMENTATION) {
UAE_LOG_STUB("");
return 0;
}
#endif
#ifdef WITH_BUILTIN_SLIRP
if (impl == BUILTIN_IMPLEMENTATION) {
return slirp_redir(is_udp, host_port, guest_addr, guest_port);
}
#endif
return 0;
}