>By the way, bsdi has an interesting library function called >"getifaddrs", which returns a linked list of addresses. We may have to >consider to standardize such a function... Yes, something like that is clearly the way forward. Any fixed-length buffer will cause trouble sooner or later. It would be possible to implement this function in user-space on Linux (in libc or where-ever) so it can be made to work even with current kernels. p.