site_archiver@lists.apple.com Delivered-To: macnetworkprog@lists.apple.com S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Technical Support * Networking, Communications, Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists.... At 9:52 +1000 27/9/05, Heath Raftery wrote: My vote goes to the NSString. I'd probably vote for this as well. It's not the best approach in the specific case you mention (-acceptOnAddress:port:), but it's the best solution in general. At 1:45 -0700 25/9/05, Dustin Voss wrote: To my knowledge, there are four high-level APIs the developer might have used to get a particular address: System Configuration, Open Transport, CFHost, and NSHost. Why not provide your own API to get the list of local addresses? That way you can return the address in a format that's compatible with your -acceptOnAddress:port: input. At 1:45 -0700 25/9/05, Dustin Voss wrote: Whichever I choose, I want to support both IPv4 and IPv6 addresses. I don't care about DNS names. But I will need to be able to verify that the developer did not pass a DNS name or an address of another computer to the method. And I need to end up with a sockaddr struct. You can just let bind do this for you. If you try to bind to an address that's not local, you'll get an error (AFAICT EADDRNOTAVAIL). At 9:52 +1000 27/9/05, Heath Raftery wrote: I haven't had to deal with the extra difficulties you'll face, and you've probably already got this far, but here's what I use to go from NSString to sockaddr: struct sockaddr_in socketAddress; socketAddress.sin_family = AF_INET; socketAddress.sin_port = htons(fRemoteHostPort); inet_aton([fRemoteHostIPAddress cString], &(socketAddress.sin_addr)); memset(&(socketAddress.sin_zero), '\0', 8); // zero the rest of the struct If you want to work at the BSD level, I think that getaddrinfo <x-man-page://3/getaddrinfo> is the best choice. It supports both v4 and v6. By passing AI_NUMERICHOST, you can get it to just support the textual representation of numerical IP addresses, and never hit the wire. This email sent to site_archiver@lists.apple.com